Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | SCSI Tape Driver for Linux version 1.1 and newer. See the accompanying | |
3 | file Documentation/scsi/st.txt for more information. | |
4 | ||
5 | History: | |
6 | ||
7 | OnStream SCSI Tape support (osst) cloned from st.c by | |
8 | Willem Riede (osst@riede.org) Feb 2000 | |
9 | Fixes ... Kurt Garloff <garloff@suse.de> Mar 2000 | |
10 | ||
11 | Rewritten from Dwayne Forsyth's SCSI tape driver by Kai Makisara. | |
12 | Contribution and ideas from several people including (in alphabetical | |
13 | order) Klaus Ehrenfried, Wolfgang Denk, Steve Hirsch, Andreas Koppenh"ofer, | |
14 | Michael Leodolter, Eyal Lebedinsky, J"org Weule, and Eric Youngdale. | |
15 | ||
5e6575c0 | 16 | Copyright 1992 - 2002 Kai Makisara / 2000 - 2006 Willem Riede |
1da177e4 LT |
17 | email osst@riede.org |
18 | ||
19 | $Header: /cvsroot/osst/Driver/osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $ | |
20 | ||
21 | Microscopic alterations - Rik Ling, 2000/12/21 | |
22 | Last st.c sync: Tue Oct 15 22:01:04 2002 by makisara | |
23 | Some small formal changes - aeb, 950809 | |
24 | */ | |
25 | ||
26 | static const char * cvsid = "$Id: osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $"; | |
5e6575c0 | 27 | static const char * osst_version = "0.99.4"; |
1da177e4 LT |
28 | |
29 | /* The "failure to reconnect" firmware bug */ | |
30 | #define OSST_FW_NEED_POLL_MIN 10601 /*(107A)*/ | |
31 | #define OSST_FW_NEED_POLL_MAX 10704 /*(108D)*/ | |
32 | #define OSST_FW_NEED_POLL(x,d) ((x) >= OSST_FW_NEED_POLL_MIN && (x) <= OSST_FW_NEED_POLL_MAX && d->host->this_id != 7) | |
33 | ||
34 | #include <linux/module.h> | |
35 | ||
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/proc_fs.h> | |
40 | #include <linux/mm.h> | |
5a0e3ad6 | 41 | #include <linux/slab.h> |
1da177e4 LT |
42 | #include <linux/init.h> |
43 | #include <linux/string.h> | |
44 | #include <linux/errno.h> | |
45 | #include <linux/mtio.h> | |
46 | #include <linux/ioctl.h> | |
47 | #include <linux/fcntl.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/vmalloc.h> | |
50 | #include <linux/blkdev.h> | |
51 | #include <linux/moduleparam.h> | |
1da177e4 | 52 | #include <linux/delay.h> |
60c904ae | 53 | #include <linux/jiffies.h> |
c45d15d2 | 54 | #include <linux/mutex.h> |
1da177e4 LT |
55 | #include <asm/uaccess.h> |
56 | #include <asm/dma.h> | |
1da177e4 LT |
57 | |
58 | /* The driver prints some debugging information on the console if DEBUG | |
59 | is defined and non-zero. */ | |
60 | #define DEBUG 0 | |
61 | ||
62 | /* The message level for the debug messages is currently set to KERN_NOTICE | |
63 | so that people can easily see the messages. Later when the debugging messages | |
64 | in the drivers are more widely classified, this may be changed to KERN_DEBUG. */ | |
65 | #define OSST_DEB_MSG KERN_NOTICE | |
66 | ||
67 | #include <scsi/scsi.h> | |
68 | #include <scsi/scsi_dbg.h> | |
69 | #include <scsi/scsi_device.h> | |
70 | #include <scsi/scsi_driver.h> | |
71 | #include <scsi/scsi_eh.h> | |
72 | #include <scsi/scsi_host.h> | |
73 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
74 | |
75 | #define ST_KILOBYTE 1024 | |
76 | ||
77 | #include "st.h" | |
78 | #include "osst.h" | |
79 | #include "osst_options.h" | |
80 | #include "osst_detect.h" | |
81 | ||
c45d15d2 | 82 | static DEFINE_MUTEX(osst_int_mutex); |
1da177e4 LT |
83 | static int max_dev = 0; |
84 | static int write_threshold_kbs = 0; | |
85 | static int max_sg_segs = 0; | |
86 | ||
87 | #ifdef MODULE | |
88 | MODULE_AUTHOR("Willem Riede"); | |
89 | MODULE_DESCRIPTION("OnStream {DI-|FW-|SC-|USB}{30|50} Tape Driver"); | |
90 | MODULE_LICENSE("GPL"); | |
f018fa55 | 91 | MODULE_ALIAS_CHARDEV_MAJOR(OSST_MAJOR); |
d7b8bcb0 | 92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_TAPE); |
1da177e4 LT |
93 | |
94 | module_param(max_dev, int, 0444); | |
95 | MODULE_PARM_DESC(max_dev, "Maximum number of OnStream Tape Drives to attach (4)"); | |
96 | ||
97 | module_param(write_threshold_kbs, int, 0644); | |
98 | MODULE_PARM_DESC(write_threshold_kbs, "Asynchronous write threshold (KB; 32)"); | |
99 | ||
100 | module_param(max_sg_segs, int, 0644); | |
101 | MODULE_PARM_DESC(max_sg_segs, "Maximum number of scatter/gather segments to use (9)"); | |
102 | #else | |
103 | static struct osst_dev_parm { | |
104 | char *name; | |
105 | int *val; | |
106 | } parms[] __initdata = { | |
107 | { "max_dev", &max_dev }, | |
108 | { "write_threshold_kbs", &write_threshold_kbs }, | |
109 | { "max_sg_segs", &max_sg_segs } | |
110 | }; | |
111 | #endif | |
112 | ||
1da177e4 LT |
113 | /* Some default definitions have been moved to osst_options.h */ |
114 | #define OSST_BUFFER_SIZE (OSST_BUFFER_BLOCKS * ST_KILOBYTE) | |
115 | #define OSST_WRITE_THRESHOLD (OSST_WRITE_THRESHOLD_BLOCKS * ST_KILOBYTE) | |
116 | ||
117 | /* The buffer size should fit into the 24 bits for length in the | |
118 | 6-byte SCSI read and write commands. */ | |
119 | #if OSST_BUFFER_SIZE >= (2 << 24 - 1) | |
120 | #error "Buffer size should not exceed (2 << 24 - 1) bytes!" | |
121 | #endif | |
122 | ||
123 | #if DEBUG | |
124 | static int debugging = 1; | |
125 | /* uncomment define below to test error recovery */ | |
126 | // #define OSST_INJECT_ERRORS 1 | |
127 | #endif | |
128 | ||
129 | /* Do not retry! The drive firmware already retries when appropriate, | |
130 | and when it tries to tell us something, we had better listen... */ | |
131 | #define MAX_RETRIES 0 | |
132 | ||
133 | #define NO_TAPE NOT_READY | |
134 | ||
135 | #define OSST_WAIT_POSITION_COMPLETE (HZ > 200 ? HZ / 200 : 1) | |
136 | #define OSST_WAIT_WRITE_COMPLETE (HZ / 12) | |
137 | #define OSST_WAIT_LONG_WRITE_COMPLETE (HZ / 2) | |
138 | ||
139 | #define OSST_TIMEOUT (200 * HZ) | |
140 | #define OSST_LONG_TIMEOUT (1800 * HZ) | |
141 | ||
142 | #define TAPE_NR(x) (iminor(x) & ~(-1 << ST_MODE_SHIFT)) | |
143 | #define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT) | |
144 | #define TAPE_REWIND(x) ((iminor(x) & 0x80) == 0) | |
145 | #define TAPE_IS_RAW(x) (TAPE_MODE(x) & (ST_NBR_MODES >> 1)) | |
146 | ||
147 | /* Internal ioctl to set both density (uppermost 8 bits) and blocksize (lower | |
148 | 24 bits) */ | |
149 | #define SET_DENS_AND_BLK 0x10001 | |
150 | ||
151 | static int osst_buffer_size = OSST_BUFFER_SIZE; | |
152 | static int osst_write_threshold = OSST_WRITE_THRESHOLD; | |
153 | static int osst_max_sg_segs = OSST_MAX_SG; | |
154 | static int osst_max_dev = OSST_MAX_TAPES; | |
155 | static int osst_nr_dev; | |
156 | ||
157 | static struct osst_tape **os_scsi_tapes = NULL; | |
158 | static DEFINE_RWLOCK(os_scsi_tapes_lock); | |
159 | ||
160 | static int modes_defined = 0; | |
161 | ||
162 | static struct osst_buffer *new_tape_buffer(int, int, int); | |
163 | static int enlarge_buffer(struct osst_buffer *, int); | |
164 | static void normalize_buffer(struct osst_buffer *); | |
165 | static int append_to_buffer(const char __user *, struct osst_buffer *, int); | |
166 | static int from_buffer(struct osst_buffer *, char __user *, int); | |
167 | static int osst_zero_buffer_tail(struct osst_buffer *); | |
168 | static int osst_copy_to_buffer(struct osst_buffer *, unsigned char *); | |
169 | static int osst_copy_from_buffer(struct osst_buffer *, unsigned char *); | |
170 | ||
171 | static int osst_probe(struct device *); | |
172 | static int osst_remove(struct device *); | |
173 | ||
174 | static struct scsi_driver osst_template = { | |
1da177e4 LT |
175 | .gendrv = { |
176 | .name = "osst", | |
3af6b352 | 177 | .owner = THIS_MODULE, |
1da177e4 LT |
178 | .probe = osst_probe, |
179 | .remove = osst_remove, | |
180 | } | |
181 | }; | |
182 | ||
5e6575c0 | 183 | static int osst_int_ioctl(struct osst_tape *STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
184 | unsigned int cmd_in, unsigned long arg); |
185 | ||
5e6575c0 | 186 | static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int frame, int skip); |
1da177e4 | 187 | |
5e6575c0 | 188 | static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt); |
1da177e4 | 189 | |
5e6575c0 | 190 | static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt); |
1da177e4 | 191 | |
5e6575c0 | 192 | static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending); |
1da177e4 LT |
193 | |
194 | static inline char *tape_name(struct osst_tape *tape) | |
195 | { | |
196 | return tape->drive->disk_name; | |
197 | } | |
198 | \f | |
199 | /* Routines that handle the interaction with mid-layer SCSI routines */ | |
200 | ||
5e6575c0 WR |
201 | |
202 | /* Normalize Sense */ | |
203 | static void osst_analyze_sense(struct osst_request *SRpnt, struct st_cmdstatus *s) | |
204 | { | |
205 | const u8 *ucp; | |
206 | const u8 *sense = SRpnt->sense; | |
207 | ||
208 | s->have_sense = scsi_normalize_sense(SRpnt->sense, | |
209 | SCSI_SENSE_BUFFERSIZE, &s->sense_hdr); | |
210 | s->flags = 0; | |
211 | ||
212 | if (s->have_sense) { | |
213 | s->deferred = 0; | |
214 | s->remainder_valid = | |
215 | scsi_get_sense_info_fld(sense, SCSI_SENSE_BUFFERSIZE, &s->uremainder64); | |
216 | switch (sense[0] & 0x7f) { | |
217 | case 0x71: | |
218 | s->deferred = 1; | |
219 | case 0x70: | |
220 | s->fixed_format = 1; | |
221 | s->flags = sense[2] & 0xe0; | |
222 | break; | |
223 | case 0x73: | |
224 | s->deferred = 1; | |
225 | case 0x72: | |
226 | s->fixed_format = 0; | |
227 | ucp = scsi_sense_desc_find(sense, SCSI_SENSE_BUFFERSIZE, 4); | |
228 | s->flags = ucp ? (ucp[3] & 0xe0) : 0; | |
229 | break; | |
230 | } | |
231 | } | |
232 | } | |
233 | ||
1da177e4 | 234 | /* Convert the result to success code */ |
5e6575c0 | 235 | static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt) |
1da177e4 LT |
236 | { |
237 | char *name = tape_name(STp); | |
5e6575c0 WR |
238 | int result = SRpnt->result; |
239 | u8 * sense = SRpnt->sense, scode; | |
1da177e4 LT |
240 | #if DEBUG |
241 | const char *stp; | |
242 | #endif | |
5e6575c0 | 243 | struct st_cmdstatus *cmdstatp; |
1da177e4 | 244 | |
5e6575c0 | 245 | if (!result) |
1da177e4 | 246 | return 0; |
5e6575c0 WR |
247 | |
248 | cmdstatp = &STp->buffer->cmdstat; | |
249 | osst_analyze_sense(SRpnt, cmdstatp); | |
250 | ||
251 | if (cmdstatp->have_sense) | |
252 | scode = STp->buffer->cmdstat.sense_hdr.sense_key; | |
253 | else | |
1da177e4 | 254 | scode = 0; |
1da177e4 LT |
255 | #if DEBUG |
256 | if (debugging) { | |
5e6575c0 | 257 | printk(OSST_DEB_MSG "%s:D: Error: %x, cmd: %x %x %x %x %x %x\n", |
1da177e4 | 258 | name, result, |
5e6575c0 WR |
259 | SRpnt->cmd[0], SRpnt->cmd[1], SRpnt->cmd[2], |
260 | SRpnt->cmd[3], SRpnt->cmd[4], SRpnt->cmd[5]); | |
1da177e4 | 261 | if (scode) printk(OSST_DEB_MSG "%s:D: Sense: %02x, ASC: %02x, ASCQ: %02x\n", |
d811b848 | 262 | name, scode, sense[12], sense[13]); |
5e6575c0 | 263 | if (cmdstatp->have_sense) |
d811b848 HR |
264 | __scsi_print_sense(STp->device, name, |
265 | SRpnt->sense, SCSI_SENSE_BUFFERSIZE); | |
1da177e4 LT |
266 | } |
267 | else | |
268 | #endif | |
5e6575c0 | 269 | if (cmdstatp->have_sense && ( |
1da177e4 LT |
270 | scode != NO_SENSE && |
271 | scode != RECOVERED_ERROR && | |
272 | /* scode != UNIT_ATTENTION && */ | |
273 | scode != BLANK_CHECK && | |
274 | scode != VOLUME_OVERFLOW && | |
5e6575c0 WR |
275 | SRpnt->cmd[0] != MODE_SENSE && |
276 | SRpnt->cmd[0] != TEST_UNIT_READY)) { /* Abnormal conditions for tape */ | |
277 | if (cmdstatp->have_sense) { | |
1da177e4 | 278 | printk(KERN_WARNING "%s:W: Command with sense data:\n", name); |
d811b848 HR |
279 | __scsi_print_sense(STp->device, name, |
280 | SRpnt->sense, SCSI_SENSE_BUFFERSIZE); | |
1da177e4 LT |
281 | } |
282 | else { | |
283 | static int notyetprinted = 1; | |
284 | ||
285 | printk(KERN_WARNING | |
a4976d68 JB |
286 | "%s:W: Warning %x (driver bt 0x%x, host bt 0x%x).\n", |
287 | name, result, driver_byte(result), | |
1da177e4 LT |
288 | host_byte(result)); |
289 | if (notyetprinted) { | |
290 | notyetprinted = 0; | |
291 | printk(KERN_INFO | |
292 | "%s:I: This warning may be caused by your scsi controller,\n", name); | |
293 | printk(KERN_INFO | |
294 | "%s:I: it has been reported with some Buslogic cards.\n", name); | |
295 | } | |
296 | } | |
297 | } | |
298 | STp->pos_unknown |= STp->device->was_reset; | |
299 | ||
5e6575c0 | 300 | if (cmdstatp->have_sense && scode == RECOVERED_ERROR) { |
1da177e4 LT |
301 | STp->recover_count++; |
302 | STp->recover_erreg++; | |
303 | #if DEBUG | |
304 | if (debugging) { | |
5e6575c0 | 305 | if (SRpnt->cmd[0] == READ_6) |
1da177e4 | 306 | stp = "read"; |
5e6575c0 | 307 | else if (SRpnt->cmd[0] == WRITE_6) |
1da177e4 LT |
308 | stp = "write"; |
309 | else | |
310 | stp = "ioctl"; | |
311 | printk(OSST_DEB_MSG "%s:D: Recovered %s error (%d).\n", name, stp, | |
312 | STp->recover_count); | |
313 | } | |
314 | #endif | |
315 | if ((sense[2] & 0xe0) == 0) | |
316 | return 0; | |
317 | } | |
318 | return (-EIO); | |
319 | } | |
320 | ||
321 | ||
322 | /* Wakeup from interrupt */ | |
26243043 | 323 | static void osst_end_async(struct request *req, int update) |
1da177e4 | 324 | { |
26243043 | 325 | struct osst_request *SRpnt = req->end_io_data; |
5e6575c0 | 326 | struct osst_tape *STp = SRpnt->stp; |
26243043 | 327 | struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; |
1da177e4 | 328 | |
26243043 | 329 | STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors; |
1da177e4 LT |
330 | #if DEBUG |
331 | STp->write_pending = 0; | |
332 | #endif | |
5e6575c0 WR |
333 | if (SRpnt->waiting) |
334 | complete(SRpnt->waiting); | |
26243043 FT |
335 | |
336 | if (SRpnt->bio) { | |
337 | kfree(mdata->pages); | |
338 | blk_rq_unmap_user(SRpnt->bio); | |
339 | } | |
340 | ||
341 | __blk_put_request(req->q, req); | |
5e6575c0 WR |
342 | } |
343 | ||
344 | /* osst_request memory management */ | |
345 | static struct osst_request *osst_allocate_request(void) | |
346 | { | |
347 | return kzalloc(sizeof(struct osst_request), GFP_KERNEL); | |
1da177e4 LT |
348 | } |
349 | ||
5e6575c0 WR |
350 | static void osst_release_request(struct osst_request *streq) |
351 | { | |
352 | kfree(streq); | |
353 | } | |
1da177e4 | 354 | |
26243043 FT |
355 | static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd, |
356 | int cmd_len, int data_direction, void *buffer, unsigned bufflen, | |
357 | int use_sg, int timeout, int retries) | |
358 | { | |
359 | struct request *req; | |
360 | struct page **pages = NULL; | |
361 | struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; | |
362 | ||
363 | int err = 0; | |
364 | int write = (data_direction == DMA_TO_DEVICE); | |
365 | ||
366 | req = blk_get_request(SRpnt->stp->device->request_queue, write, GFP_KERNEL); | |
a492f075 | 367 | if (IS_ERR(req)) |
26243043 FT |
368 | return DRIVER_ERROR << 24; |
369 | ||
f27b087b | 370 | blk_rq_set_block_pc(req); |
26243043 FT |
371 | req->cmd_flags |= REQ_QUIET; |
372 | ||
373 | SRpnt->bio = NULL; | |
374 | ||
375 | if (use_sg) { | |
376 | struct scatterlist *sg, *sgl = (struct scatterlist *)buffer; | |
377 | int i; | |
378 | ||
379 | pages = kzalloc(use_sg * sizeof(struct page *), GFP_KERNEL); | |
380 | if (!pages) | |
381 | goto free_req; | |
382 | ||
383 | for_each_sg(sgl, sg, use_sg, i) | |
384 | pages[i] = sg_page(sg); | |
385 | ||
386 | mdata->null_mapped = 1; | |
387 | ||
388 | mdata->page_order = get_order(sgl[0].length); | |
389 | mdata->nr_entries = | |
390 | DIV_ROUND_UP(bufflen, PAGE_SIZE << mdata->page_order); | |
391 | mdata->offset = 0; | |
392 | ||
393 | err = blk_rq_map_user(req->q, req, mdata, NULL, bufflen, GFP_KERNEL); | |
394 | if (err) { | |
395 | kfree(pages); | |
396 | goto free_req; | |
397 | } | |
398 | SRpnt->bio = req->bio; | |
399 | mdata->pages = pages; | |
400 | ||
401 | } else if (bufflen) { | |
402 | err = blk_rq_map_kern(req->q, req, buffer, bufflen, GFP_KERNEL); | |
403 | if (err) | |
404 | goto free_req; | |
405 | } | |
406 | ||
407 | req->cmd_len = cmd_len; | |
408 | memset(req->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ | |
409 | memcpy(req->cmd, cmd, req->cmd_len); | |
410 | req->sense = SRpnt->sense; | |
411 | req->sense_len = 0; | |
412 | req->timeout = timeout; | |
413 | req->retries = retries; | |
414 | req->end_io_data = SRpnt; | |
415 | ||
416 | blk_execute_rq_nowait(req->q, NULL, req, 1, osst_end_async); | |
417 | return 0; | |
418 | free_req: | |
419 | blk_put_request(req); | |
420 | return DRIVER_ERROR << 24; | |
421 | } | |
422 | ||
1da177e4 LT |
423 | /* Do the scsi command. Waits until command performed if do_wait is true. |
424 | Otherwise osst_write_behind_check() is used to check that the command | |
425 | has finished. */ | |
5e6575c0 | 426 | static struct osst_request * osst_do_scsi(struct osst_request *SRpnt, struct osst_tape *STp, |
1da177e4 LT |
427 | unsigned char *cmd, int bytes, int direction, int timeout, int retries, int do_wait) |
428 | { | |
429 | unsigned char *bp; | |
5e6575c0 | 430 | unsigned short use_sg; |
1da177e4 LT |
431 | #ifdef OSST_INJECT_ERRORS |
432 | static int inject = 0; | |
433 | static int repeat = 0; | |
434 | #endif | |
5e6575c0 WR |
435 | struct completion *waiting; |
436 | ||
437 | /* if async, make sure there's no command outstanding */ | |
438 | if (!do_wait && ((STp->buffer)->last_SRpnt)) { | |
439 | printk(KERN_ERR "%s: Async command already active.\n", | |
440 | tape_name(STp)); | |
441 | if (signal_pending(current)) | |
442 | (STp->buffer)->syscall_result = (-EINTR); | |
443 | else | |
444 | (STp->buffer)->syscall_result = (-EBUSY); | |
445 | return NULL; | |
446 | } | |
447 | ||
1da177e4 | 448 | if (SRpnt == NULL) { |
5e6575c0 WR |
449 | SRpnt = osst_allocate_request(); |
450 | if (SRpnt == NULL) { | |
451 | printk(KERN_ERR "%s: Can't allocate SCSI request.\n", | |
452 | tape_name(STp)); | |
1da177e4 LT |
453 | if (signal_pending(current)) |
454 | (STp->buffer)->syscall_result = (-EINTR); | |
455 | else | |
456 | (STp->buffer)->syscall_result = (-EBUSY); | |
457 | return NULL; | |
458 | } | |
5e6575c0 | 459 | SRpnt->stp = STp; |
1da177e4 LT |
460 | } |
461 | ||
5e6575c0 WR |
462 | /* If async IO, set last_SRpnt. This ptr tells write_behind_check |
463 | which IO is outstanding. It's nulled out when the IO completes. */ | |
464 | if (!do_wait) | |
465 | (STp->buffer)->last_SRpnt = SRpnt; | |
466 | ||
467 | waiting = &STp->wait; | |
468 | init_completion(waiting); | |
469 | SRpnt->waiting = waiting; | |
470 | ||
471 | use_sg = (bytes > STp->buffer->sg[0].length) ? STp->buffer->use_sg : 0; | |
472 | if (use_sg) { | |
1da177e4 | 473 | bp = (char *)&(STp->buffer->sg[0]); |
5e6575c0 WR |
474 | if (STp->buffer->sg_segs < use_sg) |
475 | use_sg = STp->buffer->sg_segs; | |
1da177e4 LT |
476 | } |
477 | else | |
478 | bp = (STp->buffer)->b_data; | |
1da177e4 | 479 | |
5e6575c0 WR |
480 | memcpy(SRpnt->cmd, cmd, sizeof(SRpnt->cmd)); |
481 | STp->buffer->cmdstat.have_sense = 0; | |
482 | STp->buffer->syscall_result = 0; | |
1da177e4 | 483 | |
26243043 FT |
484 | if (osst_execute(SRpnt, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, |
485 | use_sg, timeout, retries)) | |
5e6575c0 WR |
486 | /* could not allocate the buffer or request was too large */ |
487 | (STp->buffer)->syscall_result = (-EBUSY); | |
488 | else if (do_wait) { | |
489 | wait_for_completion(waiting); | |
490 | SRpnt->waiting = NULL; | |
1da177e4 LT |
491 | STp->buffer->syscall_result = osst_chk_result(STp, SRpnt); |
492 | #ifdef OSST_INJECT_ERRORS | |
493 | if (STp->buffer->syscall_result == 0 && | |
494 | cmd[0] == READ_6 && | |
495 | cmd[4] && | |
496 | ( (++ inject % 83) == 29 || | |
497 | (STp->first_frame_position == 240 | |
498 | /* or STp->read_error_frame to fail again on the block calculated above */ && | |
499 | ++repeat < 3))) { | |
500 | printk(OSST_DEB_MSG "%s:D: Injecting read error\n", tape_name(STp)); | |
501 | STp->buffer->last_result_fatal = 1; | |
502 | } | |
503 | #endif | |
504 | } | |
505 | return SRpnt; | |
506 | } | |
507 | ||
508 | ||
509 | /* Handle the write-behind checking (downs the semaphore) */ | |
510 | static void osst_write_behind_check(struct osst_tape *STp) | |
511 | { | |
512 | struct osst_buffer * STbuffer; | |
513 | ||
514 | STbuffer = STp->buffer; | |
515 | ||
516 | #if DEBUG | |
517 | if (STp->write_pending) | |
518 | STp->nbr_waits++; | |
519 | else | |
520 | STp->nbr_finished++; | |
521 | #endif | |
522 | wait_for_completion(&(STp->wait)); | |
5e6575c0 | 523 | STp->buffer->last_SRpnt->waiting = NULL; |
1da177e4 LT |
524 | |
525 | STp->buffer->syscall_result = osst_chk_result(STp, STp->buffer->last_SRpnt); | |
526 | ||
5e6575c0 WR |
527 | if (STp->buffer->syscall_result) |
528 | STp->buffer->syscall_result = | |
529 | osst_write_error_recovery(STp, &(STp->buffer->last_SRpnt), 1); | |
1da177e4 LT |
530 | else |
531 | STp->first_frame_position++; | |
532 | ||
5e6575c0 | 533 | osst_release_request(STp->buffer->last_SRpnt); |
1da177e4 LT |
534 | |
535 | if (STbuffer->writing < STbuffer->buffer_bytes) | |
536 | printk(KERN_WARNING "osst :A: write_behind_check: something left in buffer!\n"); | |
537 | ||
5e6575c0 | 538 | STbuffer->last_SRpnt = NULL; |
1da177e4 LT |
539 | STbuffer->buffer_bytes -= STbuffer->writing; |
540 | STbuffer->writing = 0; | |
541 | ||
542 | return; | |
543 | } | |
544 | ||
545 | ||
546 | \f | |
547 | /* Onstream specific Routines */ | |
548 | /* | |
549 | * Initialize the OnStream AUX | |
550 | */ | |
551 | static void osst_init_aux(struct osst_tape * STp, int frame_type, int frame_seq_number, | |
552 | int logical_blk_num, int blk_sz, int blk_cnt) | |
553 | { | |
554 | os_aux_t *aux = STp->buffer->aux; | |
555 | os_partition_t *par = &aux->partition; | |
556 | os_dat_t *dat = &aux->dat; | |
557 | ||
558 | if (STp->raw) return; | |
559 | ||
560 | memset(aux, 0, sizeof(*aux)); | |
561 | aux->format_id = htonl(0); | |
562 | memcpy(aux->application_sig, "LIN4", 4); | |
563 | aux->hdwr = htonl(0); | |
564 | aux->frame_type = frame_type; | |
565 | ||
566 | switch (frame_type) { | |
567 | case OS_FRAME_TYPE_HEADER: | |
568 | aux->update_frame_cntr = htonl(STp->update_frame_cntr); | |
569 | par->partition_num = OS_CONFIG_PARTITION; | |
570 | par->par_desc_ver = OS_PARTITION_VERSION; | |
571 | par->wrt_pass_cntr = htons(0xffff); | |
572 | /* 0-4 = reserved, 5-9 = header, 2990-2994 = header, 2995-2999 = reserved */ | |
573 | par->first_frame_ppos = htonl(0); | |
574 | par->last_frame_ppos = htonl(0xbb7); | |
575 | aux->frame_seq_num = htonl(0); | |
576 | aux->logical_blk_num_high = htonl(0); | |
577 | aux->logical_blk_num = htonl(0); | |
578 | aux->next_mark_ppos = htonl(STp->first_mark_ppos); | |
579 | break; | |
580 | case OS_FRAME_TYPE_DATA: | |
581 | case OS_FRAME_TYPE_MARKER: | |
582 | dat->dat_sz = 8; | |
583 | dat->reserved1 = 0; | |
584 | dat->entry_cnt = 1; | |
585 | dat->reserved3 = 0; | |
586 | dat->dat_list[0].blk_sz = htonl(blk_sz); | |
587 | dat->dat_list[0].blk_cnt = htons(blk_cnt); | |
588 | dat->dat_list[0].flags = frame_type==OS_FRAME_TYPE_MARKER? | |
589 | OS_DAT_FLAGS_MARK:OS_DAT_FLAGS_DATA; | |
590 | dat->dat_list[0].reserved = 0; | |
591 | case OS_FRAME_TYPE_EOD: | |
592 | aux->update_frame_cntr = htonl(0); | |
593 | par->partition_num = OS_DATA_PARTITION; | |
594 | par->par_desc_ver = OS_PARTITION_VERSION; | |
595 | par->wrt_pass_cntr = htons(STp->wrt_pass_cntr); | |
596 | par->first_frame_ppos = htonl(STp->first_data_ppos); | |
597 | par->last_frame_ppos = htonl(STp->capacity); | |
598 | aux->frame_seq_num = htonl(frame_seq_number); | |
599 | aux->logical_blk_num_high = htonl(0); | |
600 | aux->logical_blk_num = htonl(logical_blk_num); | |
601 | break; | |
602 | default: ; /* probably FILL */ | |
603 | } | |
95389b86 AV |
604 | aux->filemark_cnt = htonl(STp->filemark_cnt); |
605 | aux->phys_fm = htonl(0xffffffff); | |
606 | aux->last_mark_ppos = htonl(STp->last_mark_ppos); | |
607 | aux->last_mark_lbn = htonl(STp->last_mark_lbn); | |
1da177e4 LT |
608 | } |
609 | ||
610 | /* | |
611 | * Verify that we have the correct tape frame | |
612 | */ | |
613 | static int osst_verify_frame(struct osst_tape * STp, int frame_seq_number, int quiet) | |
614 | { | |
615 | char * name = tape_name(STp); | |
616 | os_aux_t * aux = STp->buffer->aux; | |
617 | os_partition_t * par = &(aux->partition); | |
618 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
619 | int blk_cnt, blk_sz, i; | |
620 | ||
621 | if (STp->raw) { | |
622 | if (STp->buffer->syscall_result) { | |
623 | for (i=0; i < STp->buffer->sg_segs; i++) | |
45711f1a | 624 | memset(page_address(sg_page(&STp->buffer->sg[i])), |
1da177e4 LT |
625 | 0, STp->buffer->sg[i].length); |
626 | strcpy(STp->buffer->b_data, "READ ERROR ON FRAME"); | |
627 | } else | |
628 | STp->buffer->buffer_bytes = OS_FRAME_SIZE; | |
629 | return 1; | |
630 | } | |
631 | if (STp->buffer->syscall_result) { | |
632 | #if DEBUG | |
633 | printk(OSST_DEB_MSG "%s:D: Skipping frame, read error\n", name); | |
634 | #endif | |
635 | return 0; | |
636 | } | |
637 | if (ntohl(aux->format_id) != 0) { | |
638 | #if DEBUG | |
639 | printk(OSST_DEB_MSG "%s:D: Skipping frame, format_id %u\n", name, ntohl(aux->format_id)); | |
640 | #endif | |
641 | goto err_out; | |
642 | } | |
643 | if (memcmp(aux->application_sig, STp->application_sig, 4) != 0 && | |
644 | (memcmp(aux->application_sig, "LIN3", 4) != 0 || STp->linux_media_version != 4)) { | |
645 | #if DEBUG | |
646 | printk(OSST_DEB_MSG "%s:D: Skipping frame, incorrect application signature\n", name); | |
647 | #endif | |
648 | goto err_out; | |
649 | } | |
650 | if (par->partition_num != OS_DATA_PARTITION) { | |
651 | if (!STp->linux_media || STp->linux_media_version != 2) { | |
652 | #if DEBUG | |
653 | printk(OSST_DEB_MSG "%s:D: Skipping frame, partition num %d\n", | |
654 | name, par->partition_num); | |
655 | #endif | |
656 | goto err_out; | |
657 | } | |
658 | } | |
659 | if (par->par_desc_ver != OS_PARTITION_VERSION) { | |
660 | #if DEBUG | |
661 | printk(OSST_DEB_MSG "%s:D: Skipping frame, partition version %d\n", name, par->par_desc_ver); | |
662 | #endif | |
663 | goto err_out; | |
664 | } | |
665 | if (ntohs(par->wrt_pass_cntr) != STp->wrt_pass_cntr) { | |
666 | #if DEBUG | |
667 | printk(OSST_DEB_MSG "%s:D: Skipping frame, wrt_pass_cntr %d (expected %d)\n", | |
668 | name, ntohs(par->wrt_pass_cntr), STp->wrt_pass_cntr); | |
669 | #endif | |
670 | goto err_out; | |
671 | } | |
672 | if (aux->frame_type != OS_FRAME_TYPE_DATA && | |
673 | aux->frame_type != OS_FRAME_TYPE_EOD && | |
674 | aux->frame_type != OS_FRAME_TYPE_MARKER) { | |
ccd1443b | 675 | if (!quiet) { |
1da177e4 LT |
676 | #if DEBUG |
677 | printk(OSST_DEB_MSG "%s:D: Skipping frame, frame type %x\n", name, aux->frame_type); | |
678 | #endif | |
ccd1443b | 679 | } |
1da177e4 LT |
680 | goto err_out; |
681 | } | |
682 | if (aux->frame_type == OS_FRAME_TYPE_EOD && | |
683 | STp->first_frame_position < STp->eod_frame_ppos) { | |
684 | printk(KERN_INFO "%s:I: Skipping premature EOD frame %d\n", name, | |
685 | STp->first_frame_position); | |
686 | goto err_out; | |
687 | } | |
688 | if (frame_seq_number != -1 && ntohl(aux->frame_seq_num) != frame_seq_number) { | |
ccd1443b | 689 | if (!quiet) { |
1da177e4 LT |
690 | #if DEBUG |
691 | printk(OSST_DEB_MSG "%s:D: Skipping frame, sequence number %u (expected %d)\n", | |
692 | name, ntohl(aux->frame_seq_num), frame_seq_number); | |
693 | #endif | |
ccd1443b | 694 | } |
1da177e4 LT |
695 | goto err_out; |
696 | } | |
697 | if (aux->frame_type == OS_FRAME_TYPE_MARKER) { | |
698 | STps->eof = ST_FM_HIT; | |
699 | ||
700 | i = ntohl(aux->filemark_cnt); | |
701 | if (STp->header_cache != NULL && i < OS_FM_TAB_MAX && (i > STp->filemark_cnt || | |
702 | STp->first_frame_position - 1 != ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i]))) { | |
703 | #if DEBUG | |
704 | printk(OSST_DEB_MSG "%s:D: %s filemark %d at frame pos %d\n", name, | |
705 | STp->header_cache->dat_fm_tab.fm_tab_ent[i] == 0?"Learned":"Corrected", | |
706 | i, STp->first_frame_position - 1); | |
707 | #endif | |
708 | STp->header_cache->dat_fm_tab.fm_tab_ent[i] = htonl(STp->first_frame_position - 1); | |
709 | if (i >= STp->filemark_cnt) | |
710 | STp->filemark_cnt = i+1; | |
711 | } | |
712 | } | |
713 | if (aux->frame_type == OS_FRAME_TYPE_EOD) { | |
714 | STps->eof = ST_EOD_1; | |
715 | STp->frame_in_buffer = 1; | |
716 | } | |
717 | if (aux->frame_type == OS_FRAME_TYPE_DATA) { | |
718 | blk_cnt = ntohs(aux->dat.dat_list[0].blk_cnt); | |
719 | blk_sz = ntohl(aux->dat.dat_list[0].blk_sz); | |
720 | STp->buffer->buffer_bytes = blk_cnt * blk_sz; | |
721 | STp->buffer->read_pointer = 0; | |
722 | STp->frame_in_buffer = 1; | |
723 | ||
724 | /* See what block size was used to write file */ | |
725 | if (STp->block_size != blk_sz && blk_sz > 0) { | |
726 | printk(KERN_INFO | |
727 | "%s:I: File was written with block size %d%c, currently %d%c, adjusted to match.\n", | |
728 | name, blk_sz<1024?blk_sz:blk_sz/1024,blk_sz<1024?'b':'k', | |
729 | STp->block_size<1024?STp->block_size:STp->block_size/1024, | |
730 | STp->block_size<1024?'b':'k'); | |
731 | STp->block_size = blk_sz; | |
732 | STp->buffer->buffer_blocks = OS_DATA_SIZE / blk_sz; | |
733 | } | |
734 | STps->eof = ST_NOEOF; | |
735 | } | |
736 | STp->frame_seq_number = ntohl(aux->frame_seq_num); | |
737 | STp->logical_blk_num = ntohl(aux->logical_blk_num); | |
738 | return 1; | |
739 | ||
740 | err_out: | |
741 | if (STp->read_error_frame == 0) | |
742 | STp->read_error_frame = STp->first_frame_position - 1; | |
743 | return 0; | |
744 | } | |
745 | ||
746 | /* | |
747 | * Wait for the unit to become Ready | |
748 | */ | |
5e6575c0 | 749 | static int osst_wait_ready(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
750 | unsigned timeout, int initial_delay) |
751 | { | |
752 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 753 | struct osst_request * SRpnt; |
1da177e4 LT |
754 | unsigned long startwait = jiffies; |
755 | #if DEBUG | |
756 | int dbg = debugging; | |
757 | char * name = tape_name(STp); | |
758 | ||
759 | printk(OSST_DEB_MSG "%s:D: Reached onstream wait ready\n", name); | |
760 | #endif | |
761 | ||
762 | if (initial_delay > 0) | |
763 | msleep(jiffies_to_msecs(initial_delay)); | |
764 | ||
765 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
766 | cmd[0] = TEST_UNIT_READY; | |
767 | ||
768 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
769 | *aSRpnt = SRpnt; | |
770 | if (!SRpnt) return (-EBUSY); | |
771 | ||
772 | while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && | |
5e6575c0 WR |
773 | (( SRpnt->sense[2] == 2 && SRpnt->sense[12] == 4 && |
774 | (SRpnt->sense[13] == 1 || SRpnt->sense[13] == 8) ) || | |
775 | ( SRpnt->sense[2] == 6 && SRpnt->sense[12] == 0x28 && | |
776 | SRpnt->sense[13] == 0 ) )) { | |
1da177e4 LT |
777 | #if DEBUG |
778 | if (debugging) { | |
779 | printk(OSST_DEB_MSG "%s:D: Sleeping in onstream wait ready\n", name); | |
780 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); | |
781 | debugging = 0; | |
782 | } | |
783 | #endif | |
784 | msleep(100); | |
785 | ||
786 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
787 | cmd[0] = TEST_UNIT_READY; | |
788 | ||
789 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
790 | } | |
791 | *aSRpnt = SRpnt; | |
792 | #if DEBUG | |
793 | debugging = dbg; | |
794 | #endif | |
795 | if ( STp->buffer->syscall_result && | |
796 | osst_write_error_recovery(STp, aSRpnt, 0) ) { | |
797 | #if DEBUG | |
798 | printk(OSST_DEB_MSG "%s:D: Abnormal exit from onstream wait ready\n", name); | |
799 | printk(OSST_DEB_MSG "%s:D: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", name, | |
5e6575c0 WR |
800 | STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2], |
801 | SRpnt->sense[12], SRpnt->sense[13]); | |
1da177e4 LT |
802 | #endif |
803 | return (-EIO); | |
804 | } | |
805 | #if DEBUG | |
806 | printk(OSST_DEB_MSG "%s:D: Normal exit from onstream wait ready\n", name); | |
807 | #endif | |
808 | return 0; | |
809 | } | |
810 | ||
811 | /* | |
812 | * Wait for a tape to be inserted in the unit | |
813 | */ | |
5e6575c0 | 814 | static int osst_wait_for_medium(struct osst_tape * STp, struct osst_request ** aSRpnt, unsigned timeout) |
1da177e4 LT |
815 | { |
816 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 817 | struct osst_request * SRpnt; |
1da177e4 LT |
818 | unsigned long startwait = jiffies; |
819 | #if DEBUG | |
820 | int dbg = debugging; | |
821 | char * name = tape_name(STp); | |
822 | ||
823 | printk(OSST_DEB_MSG "%s:D: Reached onstream wait for medium\n", name); | |
824 | #endif | |
825 | ||
826 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
827 | cmd[0] = TEST_UNIT_READY; | |
828 | ||
829 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
830 | *aSRpnt = SRpnt; | |
831 | if (!SRpnt) return (-EBUSY); | |
832 | ||
833 | while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && | |
5e6575c0 | 834 | SRpnt->sense[2] == 2 && SRpnt->sense[12] == 0x3a && SRpnt->sense[13] == 0 ) { |
1da177e4 LT |
835 | #if DEBUG |
836 | if (debugging) { | |
837 | printk(OSST_DEB_MSG "%s:D: Sleeping in onstream wait medium\n", name); | |
838 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); | |
839 | debugging = 0; | |
840 | } | |
841 | #endif | |
842 | msleep(100); | |
843 | ||
844 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
845 | cmd[0] = TEST_UNIT_READY; | |
846 | ||
847 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
848 | } | |
849 | *aSRpnt = SRpnt; | |
850 | #if DEBUG | |
851 | debugging = dbg; | |
852 | #endif | |
5e6575c0 WR |
853 | if ( STp->buffer->syscall_result && SRpnt->sense[2] != 2 && |
854 | SRpnt->sense[12] != 4 && SRpnt->sense[13] == 1) { | |
1da177e4 LT |
855 | #if DEBUG |
856 | printk(OSST_DEB_MSG "%s:D: Abnormal exit from onstream wait medium\n", name); | |
857 | printk(OSST_DEB_MSG "%s:D: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", name, | |
5e6575c0 WR |
858 | STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2], |
859 | SRpnt->sense[12], SRpnt->sense[13]); | |
1da177e4 LT |
860 | #endif |
861 | return 0; | |
862 | } | |
863 | #if DEBUG | |
864 | printk(OSST_DEB_MSG "%s:D: Normal exit from onstream wait medium\n", name); | |
865 | #endif | |
866 | return 1; | |
867 | } | |
868 | ||
5e6575c0 | 869 | static int osst_position_tape_and_confirm(struct osst_tape * STp, struct osst_request ** aSRpnt, int frame) |
1da177e4 LT |
870 | { |
871 | int retval; | |
872 | ||
873 | osst_wait_ready(STp, aSRpnt, 15 * 60, 0); /* TODO - can this catch a write error? */ | |
874 | retval = osst_set_frame_position(STp, aSRpnt, frame, 0); | |
875 | if (retval) return (retval); | |
876 | osst_wait_ready(STp, aSRpnt, 15 * 60, OSST_WAIT_POSITION_COMPLETE); | |
877 | return (osst_get_frame_position(STp, aSRpnt)); | |
878 | } | |
879 | ||
880 | /* | |
881 | * Wait for write(s) to complete | |
882 | */ | |
5e6575c0 | 883 | static int osst_flush_drive_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
884 | { |
885 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 886 | struct osst_request * SRpnt; |
1da177e4 LT |
887 | int result = 0; |
888 | int delay = OSST_WAIT_WRITE_COMPLETE; | |
889 | #if DEBUG | |
890 | char * name = tape_name(STp); | |
891 | ||
892 | printk(OSST_DEB_MSG "%s:D: Reached onstream flush drive buffer (write filemark)\n", name); | |
893 | #endif | |
894 | ||
895 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
896 | cmd[0] = WRITE_FILEMARKS; | |
897 | cmd[1] = 1; | |
898 | ||
899 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
900 | *aSRpnt = SRpnt; | |
901 | if (!SRpnt) return (-EBUSY); | |
902 | if (STp->buffer->syscall_result) { | |
5e6575c0 WR |
903 | if ((SRpnt->sense[2] & 0x0f) == 2 && SRpnt->sense[12] == 4) { |
904 | if (SRpnt->sense[13] == 8) { | |
1da177e4 LT |
905 | delay = OSST_WAIT_LONG_WRITE_COMPLETE; |
906 | } | |
907 | } else | |
908 | result = osst_write_error_recovery(STp, aSRpnt, 0); | |
909 | } | |
910 | result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay); | |
911 | STp->ps[STp->partition].rw = OS_WRITING_COMPLETE; | |
912 | ||
913 | return (result); | |
914 | } | |
915 | ||
916 | #define OSST_POLL_PER_SEC 10 | |
5e6575c0 | 917 | static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int curr, int minlast, int to) |
1da177e4 LT |
918 | { |
919 | unsigned long startwait = jiffies; | |
920 | char * name = tape_name(STp); | |
921 | #if DEBUG | |
922 | char notyetprinted = 1; | |
923 | #endif | |
924 | if (minlast >= 0 && STp->ps[STp->partition].rw != ST_READING) | |
925 | printk(KERN_ERR "%s:A: Waiting for frame without having initialized read!\n", name); | |
926 | ||
927 | while (time_before (jiffies, startwait + to*HZ)) | |
928 | { | |
929 | int result; | |
930 | result = osst_get_frame_position(STp, aSRpnt); | |
931 | if (result == -EIO) | |
932 | if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0) | |
933 | return 0; /* successful recovery leaves drive ready for frame */ | |
934 | if (result < 0) break; | |
935 | if (STp->first_frame_position == curr && | |
936 | ((minlast < 0 && | |
937 | (signed)STp->last_frame_position > (signed)curr + minlast) || | |
938 | (minlast >= 0 && STp->cur_frames > minlast) | |
939 | ) && result >= 0) | |
940 | { | |
941 | #if DEBUG | |
60c904ae | 942 | if (debugging || time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC)) |
1da177e4 LT |
943 | printk (OSST_DEB_MSG |
944 | "%s:D: Succ wait f fr %i (>%i): %i-%i %i (%i): %3li.%li s\n", | |
945 | name, curr, curr+minlast, STp->first_frame_position, | |
946 | STp->last_frame_position, STp->cur_frames, | |
947 | result, (jiffies-startwait)/HZ, | |
948 | (((jiffies-startwait)%HZ)*10)/HZ); | |
949 | #endif | |
950 | return 0; | |
951 | } | |
952 | #if DEBUG | |
60c904ae | 953 | if (time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC) && notyetprinted) |
1da177e4 LT |
954 | { |
955 | printk (OSST_DEB_MSG "%s:D: Wait for frame %i (>%i): %i-%i %i (%i)\n", | |
956 | name, curr, curr+minlast, STp->first_frame_position, | |
957 | STp->last_frame_position, STp->cur_frames, result); | |
958 | notyetprinted--; | |
959 | } | |
960 | #endif | |
961 | msleep(1000 / OSST_POLL_PER_SEC); | |
962 | } | |
963 | #if DEBUG | |
964 | printk (OSST_DEB_MSG "%s:D: Fail wait f fr %i (>%i): %i-%i %i: %3li.%li s\n", | |
965 | name, curr, curr+minlast, STp->first_frame_position, | |
966 | STp->last_frame_position, STp->cur_frames, | |
967 | (jiffies-startwait)/HZ, (((jiffies-startwait)%HZ)*10)/HZ); | |
968 | #endif | |
969 | return -EBUSY; | |
970 | } | |
971 | ||
5e6575c0 | 972 | static int osst_recover_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int writing) |
1da177e4 | 973 | { |
5e6575c0 | 974 | struct osst_request * SRpnt; |
1da177e4 LT |
975 | unsigned char cmd[MAX_COMMAND_SIZE]; |
976 | unsigned long startwait = jiffies; | |
977 | int retval = 1; | |
978 | char * name = tape_name(STp); | |
979 | ||
980 | if (writing) { | |
981 | char mybuf[24]; | |
982 | char * olddata = STp->buffer->b_data; | |
983 | int oldsize = STp->buffer->buffer_size; | |
984 | ||
985 | /* write zero fm then read pos - if shows write error, try to recover - if no progress, wait */ | |
986 | ||
987 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
988 | cmd[0] = WRITE_FILEMARKS; | |
989 | cmd[1] = 1; | |
990 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, | |
991 | MAX_RETRIES, 1); | |
992 | ||
993 | while (retval && time_before (jiffies, startwait + 5*60*HZ)) { | |
994 | ||
5e6575c0 | 995 | if (STp->buffer->syscall_result && (SRpnt->sense[2] & 0x0f) != 2) { |
1da177e4 LT |
996 | |
997 | /* some failure - not just not-ready */ | |
998 | retval = osst_write_error_recovery(STp, aSRpnt, 0); | |
999 | break; | |
1000 | } | |
a9a3047d | 1001 | schedule_timeout_interruptible(HZ / OSST_POLL_PER_SEC); |
1da177e4 LT |
1002 | |
1003 | STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; | |
1004 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1005 | cmd[0] = READ_POSITION; | |
1006 | ||
1007 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 20, DMA_FROM_DEVICE, STp->timeout, | |
1008 | MAX_RETRIES, 1); | |
1009 | ||
1010 | retval = ( STp->buffer->syscall_result || (STp->buffer)->b_data[15] > 25 ); | |
1011 | STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; | |
1012 | } | |
1013 | if (retval) | |
1014 | printk(KERN_ERR "%s:E: Device did not succeed to write buffered data\n", name); | |
1015 | } else | |
1016 | /* TODO - figure out which error conditions can be handled */ | |
1017 | if (STp->buffer->syscall_result) | |
1018 | printk(KERN_WARNING | |
1019 | "%s:W: Recover_wait_frame(read) cannot handle %02x:%02x:%02x\n", name, | |
5e6575c0 WR |
1020 | (*aSRpnt)->sense[ 2] & 0x0f, |
1021 | (*aSRpnt)->sense[12], | |
1022 | (*aSRpnt)->sense[13]); | |
1da177e4 LT |
1023 | |
1024 | return retval; | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Read the next OnStream tape frame at the current location | |
1029 | */ | |
5e6575c0 | 1030 | static int osst_read_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int timeout) |
1da177e4 LT |
1031 | { |
1032 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 1033 | struct osst_request * SRpnt; |
1da177e4 LT |
1034 | int retval = 0; |
1035 | #if DEBUG | |
1036 | os_aux_t * aux = STp->buffer->aux; | |
1037 | char * name = tape_name(STp); | |
1038 | #endif | |
1039 | ||
1040 | if (STp->poll) | |
1041 | if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout)) | |
1042 | retval = osst_recover_wait_frame(STp, aSRpnt, 0); | |
1043 | ||
1044 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1045 | cmd[0] = READ_6; | |
1046 | cmd[1] = 1; | |
1047 | cmd[4] = 1; | |
1048 | ||
1049 | #if DEBUG | |
1050 | if (debugging) | |
1051 | printk(OSST_DEB_MSG "%s:D: Reading frame from OnStream tape\n", name); | |
1052 | #endif | |
1053 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE, | |
1054 | STp->timeout, MAX_RETRIES, 1); | |
1055 | *aSRpnt = SRpnt; | |
1056 | if (!SRpnt) | |
1057 | return (-EBUSY); | |
1058 | ||
1059 | if ((STp->buffer)->syscall_result) { | |
1060 | retval = 1; | |
1061 | if (STp->read_error_frame == 0) { | |
1062 | STp->read_error_frame = STp->first_frame_position; | |
1063 | #if DEBUG | |
1064 | printk(OSST_DEB_MSG "%s:D: Recording read error at %d\n", name, STp->read_error_frame); | |
1065 | #endif | |
1066 | } | |
1067 | #if DEBUG | |
1068 | if (debugging) | |
1069 | printk(OSST_DEB_MSG "%s:D: Sense: %2x %2x %2x %2x %2x %2x %2x %2x\n", | |
1070 | name, | |
5e6575c0 WR |
1071 | SRpnt->sense[0], SRpnt->sense[1], |
1072 | SRpnt->sense[2], SRpnt->sense[3], | |
1073 | SRpnt->sense[4], SRpnt->sense[5], | |
1074 | SRpnt->sense[6], SRpnt->sense[7]); | |
1da177e4 LT |
1075 | #endif |
1076 | } | |
1077 | else | |
1078 | STp->first_frame_position++; | |
1079 | #if DEBUG | |
1080 | if (debugging) { | |
1081 | char sig[8]; int i; | |
1082 | for (i=0;i<4;i++) | |
1083 | sig[i] = aux->application_sig[i]<32?'^':aux->application_sig[i]; | |
1084 | sig[4] = '\0'; | |
1085 | printk(OSST_DEB_MSG | |
1086 | "%s:D: AUX: %s UpdFrCt#%d Wpass#%d %s FrSeq#%d LogBlk#%d Qty=%d Sz=%d\n", name, sig, | |
1087 | ntohl(aux->update_frame_cntr), ntohs(aux->partition.wrt_pass_cntr), | |
1088 | aux->frame_type==1?"EOD":aux->frame_type==2?"MARK": | |
1089 | aux->frame_type==8?"HEADR":aux->frame_type==0x80?"DATA":"FILL", | |
1090 | ntohl(aux->frame_seq_num), ntohl(aux->logical_blk_num), | |
1091 | ntohs(aux->dat.dat_list[0].blk_cnt), ntohl(aux->dat.dat_list[0].blk_sz) ); | |
1092 | if (aux->frame_type==2) | |
1093 | printk(OSST_DEB_MSG "%s:D: mark_cnt=%d, last_mark_ppos=%d, last_mark_lbn=%d\n", name, | |
1094 | ntohl(aux->filemark_cnt), ntohl(aux->last_mark_ppos), ntohl(aux->last_mark_lbn)); | |
1095 | printk(OSST_DEB_MSG "%s:D: Exit read frame from OnStream tape with code %d\n", name, retval); | |
1096 | } | |
1097 | #endif | |
1098 | return (retval); | |
1099 | } | |
1100 | ||
5e6575c0 | 1101 | static int osst_initiate_read(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
1102 | { |
1103 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
5e6575c0 | 1104 | struct osst_request * SRpnt ; |
1da177e4 LT |
1105 | unsigned char cmd[MAX_COMMAND_SIZE]; |
1106 | int retval = 0; | |
1107 | char * name = tape_name(STp); | |
1108 | ||
1109 | if (STps->rw != ST_READING) { /* Initialize read operation */ | |
1110 | if (STps->rw == ST_WRITING || STp->dirty) { | |
1111 | STp->write_type = OS_WRITE_DATA; | |
1112 | osst_flush_write_buffer(STp, aSRpnt); | |
1113 | osst_flush_drive_buffer(STp, aSRpnt); | |
1114 | } | |
1115 | STps->rw = ST_READING; | |
1116 | STp->frame_in_buffer = 0; | |
1117 | ||
1118 | /* | |
1119 | * Issue a read 0 command to get the OnStream drive | |
1120 | * read frames into its buffer. | |
1121 | */ | |
1122 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1123 | cmd[0] = READ_6; | |
1124 | cmd[1] = 1; | |
1125 | ||
1126 | #if DEBUG | |
1127 | printk(OSST_DEB_MSG "%s:D: Start Read Ahead on OnStream tape\n", name); | |
1128 | #endif | |
1129 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
1130 | *aSRpnt = SRpnt; | |
1131 | if ((retval = STp->buffer->syscall_result)) | |
1132 | printk(KERN_WARNING "%s:W: Error starting read ahead\n", name); | |
1133 | } | |
1134 | ||
1135 | return retval; | |
1136 | } | |
1137 | ||
5e6575c0 | 1138 | static int osst_get_logical_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
1139 | int frame_seq_number, int quiet) |
1140 | { | |
1141 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
1142 | char * name = tape_name(STp); | |
1143 | int cnt = 0, | |
1144 | bad = 0, | |
1145 | past = 0, | |
1146 | x, | |
1147 | position; | |
1148 | ||
1149 | /* | |
1150 | * If we want just any frame (-1) and there is a frame in the buffer, return it | |
1151 | */ | |
1152 | if (frame_seq_number == -1 && STp->frame_in_buffer) { | |
1153 | #if DEBUG | |
1154 | printk(OSST_DEB_MSG "%s:D: Frame %d still in buffer\n", name, STp->frame_seq_number); | |
1155 | #endif | |
1156 | return (STps->eof); | |
1157 | } | |
1158 | /* | |
1159 | * Search and wait for the next logical tape frame | |
1160 | */ | |
1161 | while (1) { | |
1162 | if (cnt++ > 400) { | |
1163 | printk(KERN_ERR "%s:E: Couldn't find logical frame %d, aborting\n", | |
1164 | name, frame_seq_number); | |
1165 | if (STp->read_error_frame) { | |
1166 | osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0); | |
1167 | #if DEBUG | |
1168 | printk(OSST_DEB_MSG "%s:D: Repositioning tape to bad frame %d\n", | |
1169 | name, STp->read_error_frame); | |
1170 | #endif | |
1171 | STp->read_error_frame = 0; | |
1172 | STp->abort_count++; | |
1173 | } | |
1174 | return (-EIO); | |
1175 | } | |
1176 | #if DEBUG | |
1177 | if (debugging) | |
1178 | printk(OSST_DEB_MSG "%s:D: Looking for frame %d, attempt %d\n", | |
1179 | name, frame_seq_number, cnt); | |
1180 | #endif | |
1181 | if ( osst_initiate_read(STp, aSRpnt) | |
1182 | || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) { | |
1183 | if (STp->raw) | |
1184 | return (-EIO); | |
1185 | position = osst_get_frame_position(STp, aSRpnt); | |
1186 | if (position >= 0xbae && position < 0xbb8) | |
1187 | position = 0xbb8; | |
1188 | else if (position > STp->eod_frame_ppos || ++bad == 10) { | |
1189 | position = STp->read_error_frame - 1; | |
1190 | bad = 0; | |
1191 | } | |
1192 | else { | |
1193 | position += 29; | |
1194 | cnt += 19; | |
1195 | } | |
1196 | #if DEBUG | |
1197 | printk(OSST_DEB_MSG "%s:D: Bad frame detected, positioning tape to block %d\n", | |
1198 | name, position); | |
1199 | #endif | |
1200 | osst_set_frame_position(STp, aSRpnt, position, 0); | |
1201 | continue; | |
1202 | } | |
1203 | if (osst_verify_frame(STp, frame_seq_number, quiet)) | |
1204 | break; | |
1205 | if (osst_verify_frame(STp, -1, quiet)) { | |
1206 | x = ntohl(STp->buffer->aux->frame_seq_num); | |
1207 | if (STp->fast_open) { | |
1208 | printk(KERN_WARNING | |
1209 | "%s:W: Found logical frame %d instead of %d after fast open\n", | |
1210 | name, x, frame_seq_number); | |
1211 | STp->header_ok = 0; | |
1212 | STp->read_error_frame = 0; | |
1213 | return (-EIO); | |
1214 | } | |
1215 | if (x > frame_seq_number) { | |
1216 | if (++past > 3) { | |
1217 | /* positioning backwards did not bring us to the desired frame */ | |
1218 | position = STp->read_error_frame - 1; | |
1219 | } | |
1220 | else { | |
1221 | position = osst_get_frame_position(STp, aSRpnt) | |
1222 | + frame_seq_number - x - 1; | |
1223 | ||
1224 | if (STp->first_frame_position >= 3000 && position < 3000) | |
1225 | position -= 10; | |
1226 | } | |
1227 | #if DEBUG | |
1228 | printk(OSST_DEB_MSG | |
1229 | "%s:D: Found logical frame %d while looking for %d: back up %d\n", | |
1230 | name, x, frame_seq_number, | |
1231 | STp->first_frame_position - position); | |
1232 | #endif | |
1233 | osst_set_frame_position(STp, aSRpnt, position, 0); | |
1234 | cnt += 10; | |
1235 | } | |
1236 | else | |
1237 | past = 0; | |
1238 | } | |
1239 | if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) { | |
1240 | #if DEBUG | |
1241 | printk(OSST_DEB_MSG "%s:D: Skipping config partition\n", name); | |
1242 | #endif | |
1243 | osst_set_frame_position(STp, aSRpnt, 0xbb8, 0); | |
1244 | cnt--; | |
1245 | } | |
1246 | STp->frame_in_buffer = 0; | |
1247 | } | |
1248 | if (cnt > 1) { | |
1249 | STp->recover_count++; | |
1250 | STp->recover_erreg++; | |
1251 | printk(KERN_WARNING "%s:I: Don't worry, Read error at position %d recovered\n", | |
1252 | name, STp->read_error_frame); | |
1253 | } | |
1254 | STp->read_count++; | |
1255 | ||
1256 | #if DEBUG | |
1257 | if (debugging || STps->eof) | |
1258 | printk(OSST_DEB_MSG | |
1259 | "%s:D: Exit get logical frame (%d=>%d) from OnStream tape with code %d\n", | |
1260 | name, frame_seq_number, STp->frame_seq_number, STps->eof); | |
1261 | #endif | |
1262 | STp->fast_open = 0; | |
1263 | STp->read_error_frame = 0; | |
1264 | return (STps->eof); | |
1265 | } | |
1266 | ||
5e6575c0 | 1267 | static int osst_seek_logical_blk(struct osst_tape * STp, struct osst_request ** aSRpnt, int logical_blk_num) |
1da177e4 LT |
1268 | { |
1269 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
1270 | char * name = tape_name(STp); | |
1271 | int retries = 0; | |
1272 | int frame_seq_estimate, ppos_estimate, move; | |
1273 | ||
1274 | if (logical_blk_num < 0) logical_blk_num = 0; | |
1275 | #if DEBUG | |
1276 | printk(OSST_DEB_MSG "%s:D: Seeking logical block %d (now at %d, size %d%c)\n", | |
1277 | name, logical_blk_num, STp->logical_blk_num, | |
1278 | STp->block_size<1024?STp->block_size:STp->block_size/1024, | |
1279 | STp->block_size<1024?'b':'k'); | |
1280 | #endif | |
1281 | /* Do we know where we are? */ | |
1282 | if (STps->drv_block >= 0) { | |
1283 | move = logical_blk_num - STp->logical_blk_num; | |
1284 | if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1; | |
1285 | move /= (OS_DATA_SIZE / STp->block_size); | |
1286 | frame_seq_estimate = STp->frame_seq_number + move; | |
1287 | } else | |
1288 | frame_seq_estimate = logical_blk_num * STp->block_size / OS_DATA_SIZE; | |
1289 | ||
1290 | if (frame_seq_estimate < 2980) ppos_estimate = frame_seq_estimate + 10; | |
1291 | else ppos_estimate = frame_seq_estimate + 20; | |
1292 | while (++retries < 10) { | |
1293 | if (ppos_estimate > STp->eod_frame_ppos-2) { | |
1294 | frame_seq_estimate += STp->eod_frame_ppos - 2 - ppos_estimate; | |
1295 | ppos_estimate = STp->eod_frame_ppos - 2; | |
1296 | } | |
1297 | if (frame_seq_estimate < 0) { | |
1298 | frame_seq_estimate = 0; | |
1299 | ppos_estimate = 10; | |
1300 | } | |
1301 | osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0); | |
1302 | if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) { | |
1303 | /* we've located the estimated frame, now does it have our block? */ | |
1304 | if (logical_blk_num < STp->logical_blk_num || | |
1305 | logical_blk_num >= STp->logical_blk_num + ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt)) { | |
1306 | if (STps->eof == ST_FM_HIT) | |
1307 | move = logical_blk_num < STp->logical_blk_num? -2 : 1; | |
1308 | else { | |
1309 | move = logical_blk_num - STp->logical_blk_num; | |
1310 | if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1; | |
1311 | move /= (OS_DATA_SIZE / STp->block_size); | |
1312 | } | |
1313 | if (!move) move = logical_blk_num > STp->logical_blk_num ? 1 : -1; | |
1314 | #if DEBUG | |
1315 | printk(OSST_DEB_MSG | |
1316 | "%s:D: Seek retry %d at ppos %d fsq %d (est %d) lbn %d (need %d) move %d\n", | |
1317 | name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate, | |
1318 | STp->logical_blk_num, logical_blk_num, move); | |
1319 | #endif | |
1320 | frame_seq_estimate += move; | |
1321 | ppos_estimate += move; | |
1322 | continue; | |
1323 | } else { | |
1324 | STp->buffer->read_pointer = (logical_blk_num - STp->logical_blk_num) * STp->block_size; | |
1325 | STp->buffer->buffer_bytes -= STp->buffer->read_pointer; | |
1326 | STp->logical_blk_num = logical_blk_num; | |
1327 | #if DEBUG | |
1328 | printk(OSST_DEB_MSG | |
1329 | "%s:D: Seek success at ppos %d fsq %d in_buf %d, bytes %d, ptr %d*%d\n", | |
1330 | name, ppos_estimate, STp->frame_seq_number, STp->frame_in_buffer, | |
1331 | STp->buffer->buffer_bytes, STp->buffer->read_pointer / STp->block_size, | |
1332 | STp->block_size); | |
1333 | #endif | |
1334 | STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt); | |
1335 | if (STps->eof == ST_FM_HIT) { | |
1336 | STps->drv_file++; | |
1337 | STps->drv_block = 0; | |
1338 | } else { | |
1339 | STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)? | |
1340 | STp->logical_blk_num - | |
1341 | (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0): | |
1342 | -1; | |
1343 | } | |
1344 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF; | |
1345 | return 0; | |
1346 | } | |
1347 | } | |
1348 | if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0) | |
1349 | goto error; | |
1350 | /* we are not yet at the estimated frame, adjust our estimate of its physical position */ | |
1351 | #if DEBUG | |
1352 | printk(OSST_DEB_MSG "%s:D: Seek retry %d at ppos %d fsq %d (est %d) lbn %d (need %d)\n", | |
1353 | name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate, | |
1354 | STp->logical_blk_num, logical_blk_num); | |
1355 | #endif | |
1356 | if (frame_seq_estimate != STp->frame_seq_number) | |
1357 | ppos_estimate += frame_seq_estimate - STp->frame_seq_number; | |
1358 | else | |
1359 | break; | |
1360 | } | |
1361 | error: | |
1362 | printk(KERN_ERR "%s:E: Couldn't seek to logical block %d (at %d), %d retries\n", | |
1363 | name, logical_blk_num, STp->logical_blk_num, retries); | |
1364 | return (-EIO); | |
1365 | } | |
1366 | ||
1367 | /* The values below are based on the OnStream frame payload size of 32K == 2**15, | |
1368 | * that is, OSST_FRAME_SHIFT + OSST_SECTOR_SHIFT must be 15. With a minimum block | |
1369 | * size of 512 bytes, we need to be able to resolve 32K/512 == 64 == 2**6 positions | |
25985edc | 1370 | * inside each frame. Finally, OSST_SECTOR_MASK == 2**OSST_FRAME_SHIFT - 1. |
1da177e4 LT |
1371 | */ |
1372 | #define OSST_FRAME_SHIFT 6 | |
1373 | #define OSST_SECTOR_SHIFT 9 | |
1374 | #define OSST_SECTOR_MASK 0x03F | |
1375 | ||
5e6575c0 | 1376 | static int osst_get_sector(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
1377 | { |
1378 | int sector; | |
1379 | #if DEBUG | |
1380 | char * name = tape_name(STp); | |
1381 | ||
1382 | printk(OSST_DEB_MSG | |
1383 | "%s:D: Positioned at ppos %d, frame %d, lbn %d, file %d, blk %d, %cptr %d, eof %d\n", | |
1384 | name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num, | |
1385 | STp->ps[STp->partition].drv_file, STp->ps[STp->partition].drv_block, | |
1386 | STp->ps[STp->partition].rw == ST_WRITING?'w':'r', | |
1387 | STp->ps[STp->partition].rw == ST_WRITING?STp->buffer->buffer_bytes: | |
1388 | STp->buffer->read_pointer, STp->ps[STp->partition].eof); | |
1389 | #endif | |
1390 | /* do we know where we are inside a file? */ | |
1391 | if (STp->ps[STp->partition].drv_block >= 0) { | |
1392 | sector = (STp->frame_in_buffer ? STp->first_frame_position-1 : | |
1393 | STp->first_frame_position) << OSST_FRAME_SHIFT; | |
1394 | if (STp->ps[STp->partition].rw == ST_WRITING) | |
1395 | sector |= (STp->buffer->buffer_bytes >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK; | |
1396 | else | |
1397 | sector |= (STp->buffer->read_pointer >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK; | |
1398 | } else { | |
1399 | sector = osst_get_frame_position(STp, aSRpnt); | |
1400 | if (sector > 0) | |
1401 | sector <<= OSST_FRAME_SHIFT; | |
1402 | } | |
1403 | return sector; | |
1404 | } | |
1405 | ||
5e6575c0 | 1406 | static int osst_seek_sector(struct osst_tape * STp, struct osst_request ** aSRpnt, int sector) |
1da177e4 LT |
1407 | { |
1408 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
1409 | int frame = sector >> OSST_FRAME_SHIFT, | |
1410 | offset = (sector & OSST_SECTOR_MASK) << OSST_SECTOR_SHIFT, | |
1411 | r; | |
1412 | #if DEBUG | |
1413 | char * name = tape_name(STp); | |
1414 | ||
1415 | printk(OSST_DEB_MSG "%s:D: Seeking sector %d in frame %d at offset %d\n", | |
1416 | name, sector, frame, offset); | |
1417 | #endif | |
1418 | if (frame < 0 || frame >= STp->capacity) return (-ENXIO); | |
1419 | ||
1420 | if (frame <= STp->first_data_ppos) { | |
1421 | STp->frame_seq_number = STp->logical_blk_num = STps->drv_file = STps->drv_block = 0; | |
1422 | return (osst_set_frame_position(STp, aSRpnt, frame, 0)); | |
1423 | } | |
1424 | r = osst_set_frame_position(STp, aSRpnt, offset?frame:frame-1, 0); | |
1425 | if (r < 0) return r; | |
1426 | ||
1427 | r = osst_get_logical_frame(STp, aSRpnt, -1, 1); | |
1428 | if (r < 0) return r; | |
1429 | ||
1430 | if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO); | |
1431 | ||
1432 | if (offset) { | |
1433 | STp->logical_blk_num += offset / STp->block_size; | |
1434 | STp->buffer->read_pointer = offset; | |
1435 | STp->buffer->buffer_bytes -= offset; | |
1436 | } else { | |
1437 | STp->frame_seq_number++; | |
1438 | STp->frame_in_buffer = 0; | |
1439 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); | |
1440 | STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0; | |
1441 | } | |
1442 | STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt); | |
1443 | if (STps->eof == ST_FM_HIT) { | |
1444 | STps->drv_file++; | |
1445 | STps->drv_block = 0; | |
1446 | } else { | |
1447 | STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)? | |
1448 | STp->logical_blk_num - | |
1449 | (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0): | |
1450 | -1; | |
1451 | } | |
1452 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF; | |
1453 | #if DEBUG | |
1454 | printk(OSST_DEB_MSG | |
1455 | "%s:D: Now positioned at ppos %d, frame %d, lbn %d, file %d, blk %d, rptr %d, eof %d\n", | |
1456 | name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num, | |
1457 | STps->drv_file, STps->drv_block, STp->buffer->read_pointer, STps->eof); | |
1458 | #endif | |
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * Read back the drive's internal buffer contents, as a part | |
1464 | * of the write error recovery mechanism for old OnStream | |
1465 | * firmware revisions. | |
1466 | * Precondition for this function to work: all frames in the | |
1467 | * drive's buffer must be of one type (DATA, MARK or EOD)! | |
1468 | */ | |
5e6575c0 | 1469 | static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
1470 | unsigned int frame, unsigned int skip, int pending) |
1471 | { | |
5e6575c0 | 1472 | struct osst_request * SRpnt = * aSRpnt; |
1da177e4 LT |
1473 | unsigned char * buffer, * p; |
1474 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
1475 | int flag, new_frame, i; | |
1476 | int nframes = STp->cur_frames; | |
1477 | int blks_per_frame = ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); | |
1478 | int frame_seq_number = ntohl(STp->buffer->aux->frame_seq_num) | |
1479 | - (nframes + pending - 1); | |
1480 | int logical_blk_num = ntohl(STp->buffer->aux->logical_blk_num) | |
1481 | - (nframes + pending - 1) * blks_per_frame; | |
1482 | char * name = tape_name(STp); | |
1483 | unsigned long startwait = jiffies; | |
1484 | #if DEBUG | |
1485 | int dbg = debugging; | |
1486 | #endif | |
1487 | ||
2099973a | 1488 | if ((buffer = vmalloc((nframes + 1) * OS_DATA_SIZE)) == NULL) |
1da177e4 LT |
1489 | return (-EIO); |
1490 | ||
1491 | printk(KERN_INFO "%s:I: Reading back %d frames from drive buffer%s\n", | |
1492 | name, nframes, pending?" and one that was pending":""); | |
1493 | ||
1494 | osst_copy_from_buffer(STp->buffer, (p = &buffer[nframes * OS_DATA_SIZE])); | |
1495 | #if DEBUG | |
1496 | if (pending && debugging) | |
1497 | printk(OSST_DEB_MSG "%s:D: Pending frame %d (lblk %d), data %02x %02x %02x %02x\n", | |
1498 | name, frame_seq_number + nframes, | |
1499 | logical_blk_num + nframes * blks_per_frame, | |
1500 | p[0], p[1], p[2], p[3]); | |
1501 | #endif | |
1502 | for (i = 0, p = buffer; i < nframes; i++, p += OS_DATA_SIZE) { | |
1503 | ||
1504 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1505 | cmd[0] = 0x3C; /* Buffer Read */ | |
1506 | cmd[1] = 6; /* Retrieve Faulty Block */ | |
1507 | cmd[7] = 32768 >> 8; | |
1508 | cmd[8] = 32768 & 0xff; | |
1509 | ||
1510 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE, | |
1511 | STp->timeout, MAX_RETRIES, 1); | |
1512 | ||
1513 | if ((STp->buffer)->syscall_result || !SRpnt) { | |
1514 | printk(KERN_ERR "%s:E: Failed to read frame back from OnStream buffer\n", name); | |
f9101210 | 1515 | vfree(buffer); |
1da177e4 LT |
1516 | *aSRpnt = SRpnt; |
1517 | return (-EIO); | |
1518 | } | |
1519 | osst_copy_from_buffer(STp->buffer, p); | |
1520 | #if DEBUG | |
1521 | if (debugging) | |
1522 | printk(OSST_DEB_MSG "%s:D: Read back logical frame %d, data %02x %02x %02x %02x\n", | |
1523 | name, frame_seq_number + i, p[0], p[1], p[2], p[3]); | |
1524 | #endif | |
1525 | } | |
1526 | *aSRpnt = SRpnt; | |
1527 | osst_get_frame_position(STp, aSRpnt); | |
1528 | ||
1529 | #if DEBUG | |
1530 | printk(OSST_DEB_MSG "%s:D: Frames left in buffer: %d\n", name, STp->cur_frames); | |
1531 | #endif | |
1532 | /* Write synchronously so we can be sure we're OK again and don't have to recover recursively */ | |
1533 | /* In the header we don't actually re-write the frames that fail, just the ones after them */ | |
1534 | ||
1535 | for (flag=1, new_frame=frame, p=buffer, i=0; i < nframes + pending; ) { | |
1536 | ||
1537 | if (flag) { | |
1538 | if (STp->write_type == OS_WRITE_HEADER) { | |
1539 | i += skip; | |
1540 | p += skip * OS_DATA_SIZE; | |
1541 | } | |
1542 | else if (new_frame < 2990 && new_frame+skip+nframes+pending >= 2990) | |
1543 | new_frame = 3000-i; | |
1544 | else | |
1545 | new_frame += skip; | |
1546 | #if DEBUG | |
1547 | printk(OSST_DEB_MSG "%s:D: Position to frame %d, write fseq %d\n", | |
1548 | name, new_frame+i, frame_seq_number+i); | |
1549 | #endif | |
1550 | osst_set_frame_position(STp, aSRpnt, new_frame + i, 0); | |
1551 | osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE); | |
1552 | osst_get_frame_position(STp, aSRpnt); | |
1553 | SRpnt = * aSRpnt; | |
1554 | ||
1555 | if (new_frame > frame + 1000) { | |
1556 | printk(KERN_ERR "%s:E: Failed to find writable tape media\n", name); | |
f9101210 | 1557 | vfree(buffer); |
1da177e4 LT |
1558 | return (-EIO); |
1559 | } | |
1560 | if ( i >= nframes + pending ) break; | |
1561 | flag = 0; | |
1562 | } | |
1563 | osst_copy_to_buffer(STp->buffer, p); | |
1564 | /* | |
1565 | * IMPORTANT: for error recovery to work, _never_ queue frames with mixed frame type! | |
1566 | */ | |
1567 | osst_init_aux(STp, STp->buffer->aux->frame_type, frame_seq_number+i, | |
1568 | logical_blk_num + i*blks_per_frame, | |
1569 | ntohl(STp->buffer->aux->dat.dat_list[0].blk_sz), blks_per_frame); | |
1570 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1571 | cmd[0] = WRITE_6; | |
1572 | cmd[1] = 1; | |
1573 | cmd[4] = 1; | |
1574 | ||
1575 | #if DEBUG | |
1576 | if (debugging) | |
1577 | printk(OSST_DEB_MSG | |
1578 | "%s:D: About to write frame %d, seq %d, lbn %d, data %02x %02x %02x %02x\n", | |
1579 | name, new_frame+i, frame_seq_number+i, logical_blk_num + i*blks_per_frame, | |
1580 | p[0], p[1], p[2], p[3]); | |
1581 | #endif | |
1582 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, | |
1583 | STp->timeout, MAX_RETRIES, 1); | |
1584 | ||
1585 | if (STp->buffer->syscall_result) | |
1586 | flag = 1; | |
1587 | else { | |
1588 | p += OS_DATA_SIZE; i++; | |
1589 | ||
1590 | /* if we just sent the last frame, wait till all successfully written */ | |
1591 | if ( i == nframes + pending ) { | |
1592 | #if DEBUG | |
1593 | printk(OSST_DEB_MSG "%s:D: Check re-write successful\n", name); | |
1594 | #endif | |
1595 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1596 | cmd[0] = WRITE_FILEMARKS; | |
1597 | cmd[1] = 1; | |
1598 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, | |
1599 | STp->timeout, MAX_RETRIES, 1); | |
1600 | #if DEBUG | |
1601 | if (debugging) { | |
1602 | printk(OSST_DEB_MSG "%s:D: Sleeping in re-write wait ready\n", name); | |
1603 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); | |
1604 | debugging = 0; | |
1605 | } | |
1606 | #endif | |
1607 | flag = STp->buffer->syscall_result; | |
1608 | while ( !flag && time_before(jiffies, startwait + 60*HZ) ) { | |
1609 | ||
1610 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1611 | cmd[0] = TEST_UNIT_READY; | |
1612 | ||
1613 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, | |
1614 | MAX_RETRIES, 1); | |
1615 | ||
5e6575c0 WR |
1616 | if (SRpnt->sense[2] == 2 && SRpnt->sense[12] == 4 && |
1617 | (SRpnt->sense[13] == 1 || SRpnt->sense[13] == 8)) { | |
1da177e4 LT |
1618 | /* in the process of becoming ready */ |
1619 | msleep(100); | |
1620 | continue; | |
1621 | } | |
1622 | if (STp->buffer->syscall_result) | |
1623 | flag = 1; | |
1624 | break; | |
1625 | } | |
1626 | #if DEBUG | |
1627 | debugging = dbg; | |
1628 | printk(OSST_DEB_MSG "%s:D: Wait re-write finished\n", name); | |
1629 | #endif | |
1630 | } | |
1631 | } | |
1632 | *aSRpnt = SRpnt; | |
1633 | if (flag) { | |
5e6575c0 WR |
1634 | if ((SRpnt->sense[ 2] & 0x0f) == 13 && |
1635 | SRpnt->sense[12] == 0 && | |
1636 | SRpnt->sense[13] == 2) { | |
1da177e4 | 1637 | printk(KERN_ERR "%s:E: Volume overflow in write error recovery\n", name); |
f9101210 | 1638 | vfree(buffer); |
1da177e4 LT |
1639 | return (-EIO); /* hit end of tape = fail */ |
1640 | } | |
5e6575c0 WR |
1641 | i = ((SRpnt->sense[3] << 24) | |
1642 | (SRpnt->sense[4] << 16) | | |
1643 | (SRpnt->sense[5] << 8) | | |
1644 | SRpnt->sense[6] ) - new_frame; | |
1da177e4 LT |
1645 | p = &buffer[i * OS_DATA_SIZE]; |
1646 | #if DEBUG | |
1647 | printk(OSST_DEB_MSG "%s:D: Additional write error at %d\n", name, new_frame+i); | |
1648 | #endif | |
1649 | osst_get_frame_position(STp, aSRpnt); | |
1650 | #if DEBUG | |
1651 | printk(OSST_DEB_MSG "%s:D: reported frame positions: host = %d, tape = %d, buffer = %d\n", | |
1652 | name, STp->first_frame_position, STp->last_frame_position, STp->cur_frames); | |
1653 | #endif | |
1654 | } | |
1655 | } | |
1656 | if (flag) { | |
1657 | /* error recovery did not successfully complete */ | |
1658 | printk(KERN_ERR "%s:D: Write error recovery failed in %s\n", name, | |
1659 | STp->write_type == OS_WRITE_HEADER?"header":"body"); | |
1660 | } | |
1661 | if (!pending) | |
1662 | osst_copy_to_buffer(STp->buffer, p); /* so buffer content == at entry in all cases */ | |
f9101210 | 1663 | vfree(buffer); |
1da177e4 LT |
1664 | return 0; |
1665 | } | |
1666 | ||
5e6575c0 | 1667 | static int osst_reposition_and_retry(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
1668 | unsigned int frame, unsigned int skip, int pending) |
1669 | { | |
1670 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 1671 | struct osst_request * SRpnt; |
1da177e4 LT |
1672 | char * name = tape_name(STp); |
1673 | int expected = 0; | |
1674 | int attempts = 1000 / skip; | |
1675 | int flag = 1; | |
1676 | unsigned long startwait = jiffies; | |
1677 | #if DEBUG | |
1678 | int dbg = debugging; | |
1679 | #endif | |
1680 | ||
1681 | while (attempts && time_before(jiffies, startwait + 60*HZ)) { | |
1682 | if (flag) { | |
1683 | #if DEBUG | |
1684 | debugging = dbg; | |
1685 | #endif | |
1686 | if (frame < 2990 && frame+skip+STp->cur_frames+pending >= 2990) | |
1687 | frame = 3000-skip; | |
1688 | expected = frame+skip+STp->cur_frames+pending; | |
1689 | #if DEBUG | |
1690 | printk(OSST_DEB_MSG "%s:D: Position to fppos %d, re-write from fseq %d\n", | |
1691 | name, frame+skip, STp->frame_seq_number-STp->cur_frames-pending); | |
1692 | #endif | |
1693 | osst_set_frame_position(STp, aSRpnt, frame + skip, 1); | |
1694 | flag = 0; | |
1695 | attempts--; | |
a9a3047d | 1696 | schedule_timeout_interruptible(msecs_to_jiffies(100)); |
1da177e4 LT |
1697 | } |
1698 | if (osst_get_frame_position(STp, aSRpnt) < 0) { /* additional write error */ | |
1699 | #if DEBUG | |
1700 | printk(OSST_DEB_MSG "%s:D: Addl error, host %d, tape %d, buffer %d\n", | |
1701 | name, STp->first_frame_position, | |
1702 | STp->last_frame_position, STp->cur_frames); | |
1703 | #endif | |
1704 | frame = STp->last_frame_position; | |
1705 | flag = 1; | |
1706 | continue; | |
1707 | } | |
1708 | if (pending && STp->cur_frames < 50) { | |
1709 | ||
1710 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
1711 | cmd[0] = WRITE_6; | |
1712 | cmd[1] = 1; | |
1713 | cmd[4] = 1; | |
1714 | #if DEBUG | |
1715 | printk(OSST_DEB_MSG "%s:D: About to write pending fseq %d at fppos %d\n", | |
1716 | name, STp->frame_seq_number-1, STp->first_frame_position); | |
1717 | #endif | |
1718 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, | |
1719 | STp->timeout, MAX_RETRIES, 1); | |
1720 | *aSRpnt = SRpnt; | |
1721 | ||
1722 | if (STp->buffer->syscall_result) { /* additional write error */ | |
5e6575c0 WR |
1723 | if ((SRpnt->sense[ 2] & 0x0f) == 13 && |
1724 | SRpnt->sense[12] == 0 && | |
1725 | SRpnt->sense[13] == 2) { | |
1da177e4 LT |
1726 | printk(KERN_ERR |
1727 | "%s:E: Volume overflow in write error recovery\n", | |
1728 | name); | |
1729 | break; /* hit end of tape = fail */ | |
1730 | } | |
1731 | flag = 1; | |
1732 | } | |
1733 | else | |
1734 | pending = 0; | |
1735 | ||
1736 | continue; | |
1737 | } | |
1738 | if (STp->cur_frames == 0) { | |
1739 | #if DEBUG | |
1740 | debugging = dbg; | |
1741 | printk(OSST_DEB_MSG "%s:D: Wait re-write finished\n", name); | |
1742 | #endif | |
1743 | if (STp->first_frame_position != expected) { | |
1744 | printk(KERN_ERR "%s:A: Actual position %d - expected %d\n", | |
1745 | name, STp->first_frame_position, expected); | |
1746 | return (-EIO); | |
1747 | } | |
1748 | return 0; | |
1749 | } | |
1750 | #if DEBUG | |
1751 | if (debugging) { | |
1752 | printk(OSST_DEB_MSG "%s:D: Sleeping in re-write wait ready\n", name); | |
1753 | printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); | |
1754 | debugging = 0; | |
1755 | } | |
1756 | #endif | |
a9a3047d | 1757 | schedule_timeout_interruptible(msecs_to_jiffies(100)); |
1da177e4 LT |
1758 | } |
1759 | printk(KERN_ERR "%s:E: Failed to find valid tape media\n", name); | |
1760 | #if DEBUG | |
1761 | debugging = dbg; | |
1762 | #endif | |
1763 | return (-EIO); | |
1764 | } | |
1765 | ||
1766 | /* | |
1767 | * Error recovery algorithm for the OnStream tape. | |
1768 | */ | |
1769 | ||
5e6575c0 | 1770 | static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending) |
1da177e4 | 1771 | { |
5e6575c0 | 1772 | struct osst_request * SRpnt = * aSRpnt; |
1da177e4 LT |
1773 | struct st_partstat * STps = & STp->ps[STp->partition]; |
1774 | char * name = tape_name(STp); | |
1775 | int retval = 0; | |
1776 | int rw_state; | |
1777 | unsigned int frame, skip; | |
1778 | ||
1779 | rw_state = STps->rw; | |
1780 | ||
5e6575c0 WR |
1781 | if ((SRpnt->sense[ 2] & 0x0f) != 3 |
1782 | || SRpnt->sense[12] != 12 | |
1783 | || SRpnt->sense[13] != 0) { | |
1da177e4 LT |
1784 | #if DEBUG |
1785 | printk(OSST_DEB_MSG "%s:D: Write error recovery cannot handle %02x:%02x:%02x\n", name, | |
5e6575c0 | 1786 | SRpnt->sense[2], SRpnt->sense[12], SRpnt->sense[13]); |
1da177e4 LT |
1787 | #endif |
1788 | return (-EIO); | |
1789 | } | |
5e6575c0 WR |
1790 | frame = (SRpnt->sense[3] << 24) | |
1791 | (SRpnt->sense[4] << 16) | | |
1792 | (SRpnt->sense[5] << 8) | | |
1793 | SRpnt->sense[6]; | |
1794 | skip = SRpnt->sense[9]; | |
1da177e4 LT |
1795 | |
1796 | #if DEBUG | |
1797 | printk(OSST_DEB_MSG "%s:D: Detected physical bad frame at %u, advised to skip %d\n", name, frame, skip); | |
1798 | #endif | |
1799 | osst_get_frame_position(STp, aSRpnt); | |
1800 | #if DEBUG | |
1801 | printk(OSST_DEB_MSG "%s:D: reported frame positions: host = %d, tape = %d\n", | |
1802 | name, STp->first_frame_position, STp->last_frame_position); | |
1803 | #endif | |
1804 | switch (STp->write_type) { | |
1805 | case OS_WRITE_DATA: | |
1806 | case OS_WRITE_EOD: | |
1807 | case OS_WRITE_NEW_MARK: | |
1808 | printk(KERN_WARNING | |
1809 | "%s:I: Relocating %d buffered logical frames from position %u to %u\n", | |
1810 | name, STp->cur_frames, frame, (frame + skip > 3000 && frame < 3000)?3000:frame + skip); | |
1811 | if (STp->os_fw_rev >= 10600) | |
1812 | retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending); | |
1813 | else | |
1814 | retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending); | |
1815 | printk(KERN_WARNING "%s:%s: %sWrite error%srecovered\n", name, | |
1816 | retval?"E" :"I", | |
1817 | retval?"" :"Don't worry, ", | |
1818 | retval?" not ":" "); | |
1819 | break; | |
1820 | case OS_WRITE_LAST_MARK: | |
1821 | printk(KERN_ERR "%s:E: Bad frame in update last marker, fatal\n", name); | |
1822 | osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0); | |
1823 | retval = -EIO; | |
1824 | break; | |
1825 | case OS_WRITE_HEADER: | |
1826 | printk(KERN_WARNING "%s:I: Bad frame in header partition, skipped\n", name); | |
1827 | retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending); | |
1828 | break; | |
1829 | default: | |
1830 | printk(KERN_INFO "%s:I: Bad frame in filler, ignored\n", name); | |
1831 | osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0); | |
1832 | } | |
1833 | osst_get_frame_position(STp, aSRpnt); | |
1834 | #if DEBUG | |
1835 | printk(OSST_DEB_MSG "%s:D: Positioning complete, cur_frames %d, pos %d, tape pos %d\n", | |
1836 | name, STp->cur_frames, STp->first_frame_position, STp->last_frame_position); | |
1837 | printk(OSST_DEB_MSG "%s:D: next logical frame to write: %d\n", name, STp->logical_blk_num); | |
1838 | #endif | |
1839 | if (retval == 0) { | |
1840 | STp->recover_count++; | |
1841 | STp->recover_erreg++; | |
1842 | } else | |
1843 | STp->abort_count++; | |
1844 | ||
1845 | STps->rw = rw_state; | |
1846 | return retval; | |
1847 | } | |
1848 | ||
5e6575c0 | 1849 | static int osst_space_over_filemarks_backward(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
1850 | int mt_op, int mt_count) |
1851 | { | |
1852 | char * name = tape_name(STp); | |
1853 | int cnt; | |
1854 | int last_mark_ppos = -1; | |
1855 | ||
1856 | #if DEBUG | |
1857 | printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_backwards %d %d\n", name, mt_op, mt_count); | |
1858 | #endif | |
1859 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
1860 | #if DEBUG | |
1861 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_bwd\n", name); | |
1862 | #endif | |
1863 | return -EIO; | |
1864 | } | |
1865 | if (STp->linux_media_version >= 4) { | |
1866 | /* | |
1867 | * direct lookup in header filemark list | |
1868 | */ | |
1869 | cnt = ntohl(STp->buffer->aux->filemark_cnt); | |
1870 | if (STp->header_ok && | |
1871 | STp->header_cache != NULL && | |
1872 | (cnt - mt_count) >= 0 && | |
1873 | (cnt - mt_count) < OS_FM_TAB_MAX && | |
1874 | (cnt - mt_count) < STp->filemark_cnt && | |
1875 | STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == STp->buffer->aux->last_mark_ppos) | |
1876 | ||
1877 | last_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt - mt_count]); | |
1878 | #if DEBUG | |
1879 | if (STp->header_cache == NULL || (cnt - mt_count) < 0 || (cnt - mt_count) >= OS_FM_TAB_MAX) | |
1880 | printk(OSST_DEB_MSG "%s:D: Filemark lookup fail due to %s\n", name, | |
1881 | STp->header_cache == NULL?"lack of header cache":"count out of range"); | |
1882 | else | |
1883 | printk(OSST_DEB_MSG "%s:D: Filemark lookup: prev mark %d (%s), skip %d to %d\n", | |
1884 | name, cnt, | |
1885 | ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || | |
1886 | (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == | |
1887 | STp->buffer->aux->last_mark_ppos))?"match":"error", | |
1888 | mt_count, last_mark_ppos); | |
1889 | #endif | |
1890 | if (last_mark_ppos > 10 && last_mark_ppos < STp->eod_frame_ppos) { | |
1891 | osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos); | |
1892 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
1893 | #if DEBUG | |
1894 | printk(OSST_DEB_MSG | |
1895 | "%s:D: Couldn't get logical blk num in space_filemarks\n", name); | |
1896 | #endif | |
1897 | return (-EIO); | |
1898 | } | |
1899 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { | |
1900 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", | |
1901 | name, last_mark_ppos); | |
1902 | return (-EIO); | |
1903 | } | |
1904 | goto found; | |
1905 | } | |
1906 | #if DEBUG | |
1907 | printk(OSST_DEB_MSG "%s:D: Reverting to scan filemark backwards\n", name); | |
1908 | #endif | |
1909 | } | |
1910 | cnt = 0; | |
1911 | while (cnt != mt_count) { | |
1912 | last_mark_ppos = ntohl(STp->buffer->aux->last_mark_ppos); | |
1913 | if (last_mark_ppos == -1) | |
1914 | return (-EIO); | |
1915 | #if DEBUG | |
1916 | printk(OSST_DEB_MSG "%s:D: Positioning to last mark at %d\n", name, last_mark_ppos); | |
1917 | #endif | |
1918 | osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos); | |
1919 | cnt++; | |
1920 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
1921 | #if DEBUG | |
1922 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", name); | |
1923 | #endif | |
1924 | return (-EIO); | |
1925 | } | |
1926 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { | |
1927 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", | |
1928 | name, last_mark_ppos); | |
1929 | return (-EIO); | |
1930 | } | |
1931 | } | |
1932 | found: | |
1933 | if (mt_op == MTBSFM) { | |
1934 | STp->frame_seq_number++; | |
1935 | STp->frame_in_buffer = 0; | |
1936 | STp->buffer->buffer_bytes = 0; | |
1937 | STp->buffer->read_pointer = 0; | |
1938 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); | |
1939 | } | |
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | /* | |
1944 | * ADRL 1.1 compatible "slow" space filemarks fwd version | |
1945 | * | |
1946 | * Just scans for the filemark sequentially. | |
1947 | */ | |
5e6575c0 | 1948 | static int osst_space_over_filemarks_forward_slow(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
1949 | int mt_op, int mt_count) |
1950 | { | |
1951 | int cnt = 0; | |
1952 | #if DEBUG | |
1953 | char * name = tape_name(STp); | |
1954 | ||
1955 | printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_forward_slow %d %d\n", name, mt_op, mt_count); | |
1956 | #endif | |
1957 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
1958 | #if DEBUG | |
1959 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_fwd\n", name); | |
1960 | #endif | |
1961 | return (-EIO); | |
1962 | } | |
1963 | while (1) { | |
1964 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
1965 | #if DEBUG | |
1966 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", name); | |
1967 | #endif | |
1968 | return (-EIO); | |
1969 | } | |
1970 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER) | |
1971 | cnt++; | |
1972 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) { | |
1973 | #if DEBUG | |
1974 | printk(OSST_DEB_MSG "%s:D: space_fwd: EOD reached\n", name); | |
1975 | #endif | |
1976 | if (STp->first_frame_position > STp->eod_frame_ppos+1) { | |
1977 | #if DEBUG | |
1978 | printk(OSST_DEB_MSG "%s:D: EOD position corrected (%d=>%d)\n", | |
1979 | name, STp->eod_frame_ppos, STp->first_frame_position-1); | |
1980 | #endif | |
1981 | STp->eod_frame_ppos = STp->first_frame_position-1; | |
1982 | } | |
1983 | return (-EIO); | |
1984 | } | |
1985 | if (cnt == mt_count) | |
1986 | break; | |
1987 | STp->frame_in_buffer = 0; | |
1988 | } | |
1989 | if (mt_op == MTFSF) { | |
1990 | STp->frame_seq_number++; | |
1991 | STp->frame_in_buffer = 0; | |
1992 | STp->buffer->buffer_bytes = 0; | |
1993 | STp->buffer->read_pointer = 0; | |
1994 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); | |
1995 | } | |
1996 | return 0; | |
1997 | } | |
1998 | ||
1999 | /* | |
2000 | * Fast linux specific version of OnStream FSF | |
2001 | */ | |
5e6575c0 | 2002 | static int osst_space_over_filemarks_forward_fast(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
2003 | int mt_op, int mt_count) |
2004 | { | |
2005 | char * name = tape_name(STp); | |
2006 | int cnt = 0, | |
2007 | next_mark_ppos = -1; | |
2008 | ||
2009 | #if DEBUG | |
2010 | printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_forward_fast %d %d\n", name, mt_op, mt_count); | |
2011 | #endif | |
2012 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
2013 | #if DEBUG | |
2014 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_fwd\n", name); | |
2015 | #endif | |
2016 | return (-EIO); | |
2017 | } | |
2018 | ||
2019 | if (STp->linux_media_version >= 4) { | |
2020 | /* | |
2021 | * direct lookup in header filemark list | |
2022 | */ | |
2023 | cnt = ntohl(STp->buffer->aux->filemark_cnt) - 1; | |
2024 | if (STp->header_ok && | |
2025 | STp->header_cache != NULL && | |
2026 | (cnt + mt_count) < OS_FM_TAB_MAX && | |
2027 | (cnt + mt_count) < STp->filemark_cnt && | |
2028 | ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || | |
2029 | (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == STp->buffer->aux->last_mark_ppos))) | |
2030 | ||
2031 | next_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt + mt_count]); | |
2032 | #if DEBUG | |
2033 | if (STp->header_cache == NULL || (cnt + mt_count) >= OS_FM_TAB_MAX) | |
2034 | printk(OSST_DEB_MSG "%s:D: Filemark lookup fail due to %s\n", name, | |
2035 | STp->header_cache == NULL?"lack of header cache":"count out of range"); | |
2036 | else | |
2037 | printk(OSST_DEB_MSG "%s:D: Filemark lookup: prev mark %d (%s), skip %d to %d\n", | |
2038 | name, cnt, | |
2039 | ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || | |
2040 | (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == | |
2041 | STp->buffer->aux->last_mark_ppos))?"match":"error", | |
2042 | mt_count, next_mark_ppos); | |
2043 | #endif | |
2044 | if (next_mark_ppos <= 10 || next_mark_ppos > STp->eod_frame_ppos) { | |
2045 | #if DEBUG | |
2046 | printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); | |
2047 | #endif | |
2048 | return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); | |
2049 | } else { | |
2050 | osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos); | |
2051 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
2052 | #if DEBUG | |
2053 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", | |
2054 | name); | |
2055 | #endif | |
2056 | return (-EIO); | |
2057 | } | |
2058 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { | |
2059 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", | |
2060 | name, next_mark_ppos); | |
2061 | return (-EIO); | |
2062 | } | |
2063 | if (ntohl(STp->buffer->aux->filemark_cnt) != cnt + mt_count) { | |
2064 | printk(KERN_WARNING "%s:W: Expected to find marker %d at ppos %d, not %d\n", | |
2065 | name, cnt+mt_count, next_mark_ppos, | |
2066 | ntohl(STp->buffer->aux->filemark_cnt)); | |
2067 | return (-EIO); | |
2068 | } | |
2069 | } | |
2070 | } else { | |
2071 | /* | |
2072 | * Find nearest (usually previous) marker, then jump from marker to marker | |
2073 | */ | |
2074 | while (1) { | |
2075 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER) | |
2076 | break; | |
2077 | if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) { | |
2078 | #if DEBUG | |
2079 | printk(OSST_DEB_MSG "%s:D: space_fwd: EOD reached\n", name); | |
2080 | #endif | |
2081 | return (-EIO); | |
2082 | } | |
2083 | if (ntohl(STp->buffer->aux->filemark_cnt) == 0) { | |
2084 | if (STp->first_mark_ppos == -1) { | |
2085 | #if DEBUG | |
2086 | printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); | |
2087 | #endif | |
2088 | return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); | |
2089 | } | |
2090 | osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos); | |
2091 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
2092 | #if DEBUG | |
2093 | printk(OSST_DEB_MSG | |
2094 | "%s:D: Couldn't get logical blk num in space_filemarks_fwd_fast\n", | |
2095 | name); | |
2096 | #endif | |
2097 | return (-EIO); | |
2098 | } | |
2099 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { | |
2100 | printk(KERN_WARNING "%s:W: Expected to find filemark at %d\n", | |
2101 | name, STp->first_mark_ppos); | |
2102 | return (-EIO); | |
2103 | } | |
2104 | } else { | |
2105 | if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0) | |
2106 | return (-EIO); | |
2107 | mt_count++; | |
2108 | } | |
2109 | } | |
2110 | cnt++; | |
2111 | while (cnt != mt_count) { | |
2112 | next_mark_ppos = ntohl(STp->buffer->aux->next_mark_ppos); | |
2113 | if (!next_mark_ppos || next_mark_ppos > STp->eod_frame_ppos) { | |
2114 | #if DEBUG | |
2115 | printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); | |
2116 | #endif | |
2117 | return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt); | |
2118 | } | |
2119 | #if DEBUG | |
2120 | else printk(OSST_DEB_MSG "%s:D: Positioning to next mark at %d\n", name, next_mark_ppos); | |
2121 | #endif | |
2122 | osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos); | |
2123 | cnt++; | |
2124 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
2125 | #if DEBUG | |
2126 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", | |
2127 | name); | |
2128 | #endif | |
2129 | return (-EIO); | |
2130 | } | |
2131 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { | |
2132 | printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", | |
2133 | name, next_mark_ppos); | |
2134 | return (-EIO); | |
2135 | } | |
2136 | } | |
2137 | } | |
2138 | if (mt_op == MTFSF) { | |
2139 | STp->frame_seq_number++; | |
2140 | STp->frame_in_buffer = 0; | |
2141 | STp->buffer->buffer_bytes = 0; | |
2142 | STp->buffer->read_pointer = 0; | |
2143 | STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); | |
2144 | } | |
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | /* | |
2149 | * In debug mode, we want to see as many errors as possible | |
2150 | * to test the error recovery mechanism. | |
2151 | */ | |
2152 | #if DEBUG | |
5e6575c0 | 2153 | static void osst_set_retries(struct osst_tape * STp, struct osst_request ** aSRpnt, int retries) |
1da177e4 LT |
2154 | { |
2155 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 2156 | struct osst_request * SRpnt = * aSRpnt; |
1da177e4 LT |
2157 | char * name = tape_name(STp); |
2158 | ||
2159 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
2160 | cmd[0] = MODE_SELECT; | |
2161 | cmd[1] = 0x10; | |
2162 | cmd[4] = NUMBER_RETRIES_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
2163 | ||
2164 | (STp->buffer)->b_data[0] = cmd[4] - 1; | |
2165 | (STp->buffer)->b_data[1] = 0; /* Medium Type - ignoring */ | |
2166 | (STp->buffer)->b_data[2] = 0; /* Reserved */ | |
2167 | (STp->buffer)->b_data[3] = 0; /* Block Descriptor Length */ | |
2168 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = NUMBER_RETRIES_PAGE | (1 << 7); | |
2169 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 2; | |
2170 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 4; | |
2171 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = retries; | |
2172 | ||
2173 | if (debugging) | |
2174 | printk(OSST_DEB_MSG "%s:D: Setting number of retries on OnStream tape to %d\n", name, retries); | |
2175 | ||
2176 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); | |
2177 | *aSRpnt = SRpnt; | |
2178 | ||
2179 | if ((STp->buffer)->syscall_result) | |
2180 | printk (KERN_ERR "%s:D: Couldn't set retries to %d\n", name, retries); | |
2181 | } | |
2182 | #endif | |
2183 | ||
2184 | ||
5e6575c0 | 2185 | static int osst_write_filemark(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2186 | { |
2187 | int result; | |
2188 | int this_mark_ppos = STp->first_frame_position; | |
2189 | int this_mark_lbn = STp->logical_blk_num; | |
2190 | #if DEBUG | |
2191 | char * name = tape_name(STp); | |
2192 | #endif | |
2193 | ||
2194 | if (STp->raw) return 0; | |
2195 | ||
2196 | STp->write_type = OS_WRITE_NEW_MARK; | |
2197 | #if DEBUG | |
2198 | printk(OSST_DEB_MSG "%s:D: Writing Filemark %i at fppos %d (fseq %d, lblk %d)\n", | |
2199 | name, STp->filemark_cnt, this_mark_ppos, STp->frame_seq_number, this_mark_lbn); | |
2200 | #endif | |
2201 | STp->dirty = 1; | |
2202 | result = osst_flush_write_buffer(STp, aSRpnt); | |
2203 | result |= osst_flush_drive_buffer(STp, aSRpnt); | |
2204 | STp->last_mark_ppos = this_mark_ppos; | |
2205 | STp->last_mark_lbn = this_mark_lbn; | |
2206 | if (STp->header_cache != NULL && STp->filemark_cnt < OS_FM_TAB_MAX) | |
2207 | STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt] = htonl(this_mark_ppos); | |
2208 | if (STp->filemark_cnt++ == 0) | |
2209 | STp->first_mark_ppos = this_mark_ppos; | |
2210 | return result; | |
2211 | } | |
2212 | ||
5e6575c0 | 2213 | static int osst_write_eod(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2214 | { |
2215 | int result; | |
2216 | #if DEBUG | |
2217 | char * name = tape_name(STp); | |
2218 | #endif | |
2219 | ||
2220 | if (STp->raw) return 0; | |
2221 | ||
2222 | STp->write_type = OS_WRITE_EOD; | |
2223 | STp->eod_frame_ppos = STp->first_frame_position; | |
2224 | #if DEBUG | |
2225 | printk(OSST_DEB_MSG "%s:D: Writing EOD at fppos %d (fseq %d, lblk %d)\n", name, | |
2226 | STp->eod_frame_ppos, STp->frame_seq_number, STp->logical_blk_num); | |
2227 | #endif | |
2228 | STp->dirty = 1; | |
2229 | ||
2230 | result = osst_flush_write_buffer(STp, aSRpnt); | |
2231 | result |= osst_flush_drive_buffer(STp, aSRpnt); | |
2232 | STp->eod_frame_lfa = --(STp->frame_seq_number); | |
2233 | return result; | |
2234 | } | |
2235 | ||
5e6575c0 | 2236 | static int osst_write_filler(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int count) |
1da177e4 LT |
2237 | { |
2238 | char * name = tape_name(STp); | |
2239 | ||
2240 | #if DEBUG | |
2241 | printk(OSST_DEB_MSG "%s:D: Reached onstream write filler group %d\n", name, where); | |
2242 | #endif | |
2243 | osst_wait_ready(STp, aSRpnt, 60 * 5, 0); | |
2244 | osst_set_frame_position(STp, aSRpnt, where, 0); | |
2245 | STp->write_type = OS_WRITE_FILLER; | |
2246 | while (count--) { | |
2247 | memcpy(STp->buffer->b_data, "Filler", 6); | |
2248 | STp->buffer->buffer_bytes = 6; | |
2249 | STp->dirty = 1; | |
2250 | if (osst_flush_write_buffer(STp, aSRpnt)) { | |
2251 | printk(KERN_INFO "%s:I: Couldn't write filler frame\n", name); | |
2252 | return (-EIO); | |
2253 | } | |
2254 | } | |
2255 | #if DEBUG | |
2256 | printk(OSST_DEB_MSG "%s:D: Exiting onstream write filler group\n", name); | |
2257 | #endif | |
2258 | return osst_flush_drive_buffer(STp, aSRpnt); | |
2259 | } | |
2260 | ||
5e6575c0 | 2261 | static int __osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int count) |
1da177e4 LT |
2262 | { |
2263 | char * name = tape_name(STp); | |
2264 | int result; | |
2265 | ||
2266 | #if DEBUG | |
2267 | printk(OSST_DEB_MSG "%s:D: Reached onstream write header group %d\n", name, where); | |
2268 | #endif | |
2269 | osst_wait_ready(STp, aSRpnt, 60 * 5, 0); | |
2270 | osst_set_frame_position(STp, aSRpnt, where, 0); | |
2271 | STp->write_type = OS_WRITE_HEADER; | |
2272 | while (count--) { | |
2273 | osst_copy_to_buffer(STp->buffer, (unsigned char *)STp->header_cache); | |
2274 | STp->buffer->buffer_bytes = sizeof(os_header_t); | |
2275 | STp->dirty = 1; | |
2276 | if (osst_flush_write_buffer(STp, aSRpnt)) { | |
2277 | printk(KERN_INFO "%s:I: Couldn't write header frame\n", name); | |
2278 | return (-EIO); | |
2279 | } | |
2280 | } | |
2281 | result = osst_flush_drive_buffer(STp, aSRpnt); | |
2282 | #if DEBUG | |
2283 | printk(OSST_DEB_MSG "%s:D: Write onstream header group %s\n", name, result?"failed":"done"); | |
2284 | #endif | |
2285 | return result; | |
2286 | } | |
2287 | ||
5e6575c0 | 2288 | static int osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int locate_eod) |
1da177e4 LT |
2289 | { |
2290 | os_header_t * header; | |
2291 | int result; | |
2292 | char * name = tape_name(STp); | |
2293 | ||
2294 | #if DEBUG | |
2295 | printk(OSST_DEB_MSG "%s:D: Writing tape header\n", name); | |
2296 | #endif | |
2297 | if (STp->raw) return 0; | |
2298 | ||
2299 | if (STp->header_cache == NULL) { | |
2099973a | 2300 | if ((STp->header_cache = vmalloc(sizeof(os_header_t))) == NULL) { |
1da177e4 LT |
2301 | printk(KERN_ERR "%s:E: Failed to allocate header cache\n", name); |
2302 | return (-ENOMEM); | |
2303 | } | |
2304 | memset(STp->header_cache, 0, sizeof(os_header_t)); | |
2305 | #if DEBUG | |
2306 | printk(OSST_DEB_MSG "%s:D: Allocated and cleared memory for header cache\n", name); | |
2307 | #endif | |
2308 | } | |
2309 | if (STp->header_ok) STp->update_frame_cntr++; | |
2310 | else STp->update_frame_cntr = 0; | |
2311 | ||
2312 | header = STp->header_cache; | |
2313 | strcpy(header->ident_str, "ADR_SEQ"); | |
2314 | header->major_rev = 1; | |
2315 | header->minor_rev = 4; | |
2316 | header->ext_trk_tb_off = htons(17192); | |
2317 | header->pt_par_num = 1; | |
2318 | header->partition[0].partition_num = OS_DATA_PARTITION; | |
2319 | header->partition[0].par_desc_ver = OS_PARTITION_VERSION; | |
2320 | header->partition[0].wrt_pass_cntr = htons(STp->wrt_pass_cntr); | |
2321 | header->partition[0].first_frame_ppos = htonl(STp->first_data_ppos); | |
2322 | header->partition[0].last_frame_ppos = htonl(STp->capacity); | |
2323 | header->partition[0].eod_frame_ppos = htonl(STp->eod_frame_ppos); | |
2324 | header->cfg_col_width = htonl(20); | |
2325 | header->dat_col_width = htonl(1500); | |
2326 | header->qfa_col_width = htonl(0); | |
2327 | header->ext_track_tb.nr_stream_part = 1; | |
2328 | header->ext_track_tb.et_ent_sz = 32; | |
2329 | header->ext_track_tb.dat_ext_trk_ey.et_part_num = 0; | |
2330 | header->ext_track_tb.dat_ext_trk_ey.fmt = 1; | |
2331 | header->ext_track_tb.dat_ext_trk_ey.fm_tab_off = htons(17736); | |
2332 | header->ext_track_tb.dat_ext_trk_ey.last_hlb_hi = 0; | |
2333 | header->ext_track_tb.dat_ext_trk_ey.last_hlb = htonl(STp->eod_frame_lfa); | |
2334 | header->ext_track_tb.dat_ext_trk_ey.last_pp = htonl(STp->eod_frame_ppos); | |
2335 | header->dat_fm_tab.fm_part_num = 0; | |
2336 | header->dat_fm_tab.fm_tab_ent_sz = 4; | |
2337 | header->dat_fm_tab.fm_tab_ent_cnt = htons(STp->filemark_cnt<OS_FM_TAB_MAX? | |
2338 | STp->filemark_cnt:OS_FM_TAB_MAX); | |
2339 | ||
2340 | result = __osst_write_header(STp, aSRpnt, 0xbae, 5); | |
2341 | if (STp->update_frame_cntr == 0) | |
2342 | osst_write_filler(STp, aSRpnt, 0xbb3, 5); | |
2343 | result &= __osst_write_header(STp, aSRpnt, 5, 5); | |
2344 | ||
2345 | if (locate_eod) { | |
2346 | #if DEBUG | |
2347 | printk(OSST_DEB_MSG "%s:D: Locating back to eod frame addr %d\n", name, STp->eod_frame_ppos); | |
2348 | #endif | |
2349 | osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0); | |
2350 | } | |
2351 | if (result) | |
2352 | printk(KERN_ERR "%s:E: Write header failed\n", name); | |
2353 | else { | |
2354 | memcpy(STp->application_sig, "LIN4", 4); | |
2355 | STp->linux_media = 1; | |
2356 | STp->linux_media_version = 4; | |
2357 | STp->header_ok = 1; | |
2358 | } | |
2359 | return result; | |
2360 | } | |
2361 | ||
5e6575c0 | 2362 | static int osst_reset_header(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2363 | { |
2364 | if (STp->header_cache != NULL) | |
2365 | memset(STp->header_cache, 0, sizeof(os_header_t)); | |
2366 | ||
2367 | STp->logical_blk_num = STp->frame_seq_number = 0; | |
2368 | STp->frame_in_buffer = 0; | |
2369 | STp->eod_frame_ppos = STp->first_data_ppos = 0x0000000A; | |
2370 | STp->filemark_cnt = 0; | |
2371 | STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1; | |
2372 | return osst_write_header(STp, aSRpnt, 1); | |
2373 | } | |
2374 | ||
5e6575c0 | 2375 | static int __osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt, int ppos) |
1da177e4 LT |
2376 | { |
2377 | char * name = tape_name(STp); | |
2378 | os_header_t * header; | |
2379 | os_aux_t * aux; | |
2380 | char id_string[8]; | |
2381 | int linux_media_version, | |
2382 | update_frame_cntr; | |
2383 | ||
2384 | if (STp->raw) | |
2385 | return 1; | |
2386 | ||
2387 | if (ppos == 5 || ppos == 0xbae || STp->buffer->syscall_result) { | |
2388 | if (osst_set_frame_position(STp, aSRpnt, ppos, 0)) | |
2389 | printk(KERN_WARNING "%s:W: Couldn't position tape\n", name); | |
2390 | osst_wait_ready(STp, aSRpnt, 60 * 15, 0); | |
2391 | if (osst_initiate_read (STp, aSRpnt)) { | |
2392 | printk(KERN_WARNING "%s:W: Couldn't initiate read\n", name); | |
2393 | return 0; | |
2394 | } | |
2395 | } | |
2396 | if (osst_read_frame(STp, aSRpnt, 180)) { | |
2397 | #if DEBUG | |
2398 | printk(OSST_DEB_MSG "%s:D: Couldn't read header frame\n", name); | |
2399 | #endif | |
2400 | return 0; | |
2401 | } | |
2402 | header = (os_header_t *) STp->buffer->b_data; /* warning: only first segment addressable */ | |
2403 | aux = STp->buffer->aux; | |
2404 | if (aux->frame_type != OS_FRAME_TYPE_HEADER) { | |
2405 | #if DEBUG | |
2406 | printk(OSST_DEB_MSG "%s:D: Skipping non-header frame (%d)\n", name, ppos); | |
2407 | #endif | |
2408 | return 0; | |
2409 | } | |
2410 | if (ntohl(aux->frame_seq_num) != 0 || | |
2411 | ntohl(aux->logical_blk_num) != 0 || | |
2412 | aux->partition.partition_num != OS_CONFIG_PARTITION || | |
2413 | ntohl(aux->partition.first_frame_ppos) != 0 || | |
2414 | ntohl(aux->partition.last_frame_ppos) != 0xbb7 ) { | |
2415 | #if DEBUG | |
2416 | printk(OSST_DEB_MSG "%s:D: Invalid header frame (%d,%d,%d,%d,%d)\n", name, | |
2417 | ntohl(aux->frame_seq_num), ntohl(aux->logical_blk_num), | |
2418 | aux->partition.partition_num, ntohl(aux->partition.first_frame_ppos), | |
2419 | ntohl(aux->partition.last_frame_ppos)); | |
2420 | #endif | |
2421 | return 0; | |
2422 | } | |
2423 | if (strncmp(header->ident_str, "ADR_SEQ", 7) != 0 && | |
2424 | strncmp(header->ident_str, "ADR-SEQ", 7) != 0) { | |
2425 | strlcpy(id_string, header->ident_str, 8); | |
2426 | #if DEBUG | |
2427 | printk(OSST_DEB_MSG "%s:D: Invalid header identification string %s\n", name, id_string); | |
2428 | #endif | |
2429 | return 0; | |
2430 | } | |
2431 | update_frame_cntr = ntohl(aux->update_frame_cntr); | |
2432 | if (update_frame_cntr < STp->update_frame_cntr) { | |
2433 | #if DEBUG | |
2434 | printk(OSST_DEB_MSG "%s:D: Skipping frame %d with update_frame_counter %d<%d\n", | |
2435 | name, ppos, update_frame_cntr, STp->update_frame_cntr); | |
2436 | #endif | |
2437 | return 0; | |
2438 | } | |
2439 | if (header->major_rev != 1 || header->minor_rev != 4 ) { | |
2440 | #if DEBUG | |
2441 | printk(OSST_DEB_MSG "%s:D: %s revision %d.%d detected (1.4 supported)\n", | |
2442 | name, (header->major_rev != 1 || header->minor_rev < 2 || | |
2443 | header->minor_rev > 4 )? "Invalid" : "Warning:", | |
2444 | header->major_rev, header->minor_rev); | |
2445 | #endif | |
2446 | if (header->major_rev != 1 || header->minor_rev < 2 || header->minor_rev > 4) | |
2447 | return 0; | |
2448 | } | |
2449 | #if DEBUG | |
2450 | if (header->pt_par_num != 1) | |
2451 | printk(KERN_INFO "%s:W: %d partitions defined, only one supported\n", | |
2452 | name, header->pt_par_num); | |
2453 | #endif | |
2454 | memcpy(id_string, aux->application_sig, 4); | |
2455 | id_string[4] = 0; | |
2456 | if (memcmp(id_string, "LIN", 3) == 0) { | |
2457 | STp->linux_media = 1; | |
2458 | linux_media_version = id_string[3] - '0'; | |
2459 | if (linux_media_version != 4) | |
2460 | printk(KERN_INFO "%s:I: Linux media version %d detected (current 4)\n", | |
2461 | name, linux_media_version); | |
2462 | } else { | |
2463 | printk(KERN_WARNING "%s:W: Non Linux media detected (%s)\n", name, id_string); | |
2464 | return 0; | |
2465 | } | |
2466 | if (linux_media_version < STp->linux_media_version) { | |
2467 | #if DEBUG | |
2468 | printk(OSST_DEB_MSG "%s:D: Skipping frame %d with linux_media_version %d\n", | |
2469 | name, ppos, linux_media_version); | |
2470 | #endif | |
2471 | return 0; | |
2472 | } | |
2473 | if (linux_media_version > STp->linux_media_version) { | |
2474 | #if DEBUG | |
2475 | printk(OSST_DEB_MSG "%s:D: Frame %d sets linux_media_version to %d\n", | |
2476 | name, ppos, linux_media_version); | |
2477 | #endif | |
2478 | memcpy(STp->application_sig, id_string, 5); | |
2479 | STp->linux_media_version = linux_media_version; | |
2480 | STp->update_frame_cntr = -1; | |
2481 | } | |
2482 | if (update_frame_cntr > STp->update_frame_cntr) { | |
2483 | #if DEBUG | |
2484 | printk(OSST_DEB_MSG "%s:D: Frame %d sets update_frame_counter to %d\n", | |
2485 | name, ppos, update_frame_cntr); | |
2486 | #endif | |
2487 | if (STp->header_cache == NULL) { | |
2099973a | 2488 | if ((STp->header_cache = vmalloc(sizeof(os_header_t))) == NULL) { |
1da177e4 LT |
2489 | printk(KERN_ERR "%s:E: Failed to allocate header cache\n", name); |
2490 | return 0; | |
2491 | } | |
2492 | #if DEBUG | |
2493 | printk(OSST_DEB_MSG "%s:D: Allocated memory for header cache\n", name); | |
2494 | #endif | |
2495 | } | |
2496 | osst_copy_from_buffer(STp->buffer, (unsigned char *)STp->header_cache); | |
2497 | header = STp->header_cache; /* further accesses from cached (full) copy */ | |
2498 | ||
2499 | STp->wrt_pass_cntr = ntohs(header->partition[0].wrt_pass_cntr); | |
2500 | STp->first_data_ppos = ntohl(header->partition[0].first_frame_ppos); | |
2501 | STp->eod_frame_ppos = ntohl(header->partition[0].eod_frame_ppos); | |
2502 | STp->eod_frame_lfa = ntohl(header->ext_track_tb.dat_ext_trk_ey.last_hlb); | |
2503 | STp->filemark_cnt = ntohl(aux->filemark_cnt); | |
2504 | STp->first_mark_ppos = ntohl(aux->next_mark_ppos); | |
2505 | STp->last_mark_ppos = ntohl(aux->last_mark_ppos); | |
2506 | STp->last_mark_lbn = ntohl(aux->last_mark_lbn); | |
2507 | STp->update_frame_cntr = update_frame_cntr; | |
2508 | #if DEBUG | |
2509 | printk(OSST_DEB_MSG "%s:D: Detected write pass %d, update frame counter %d, filemark counter %d\n", | |
2510 | name, STp->wrt_pass_cntr, STp->update_frame_cntr, STp->filemark_cnt); | |
2511 | printk(OSST_DEB_MSG "%s:D: first data frame on tape = %d, last = %d, eod frame = %d\n", name, | |
2512 | STp->first_data_ppos, | |
2513 | ntohl(header->partition[0].last_frame_ppos), | |
2514 | ntohl(header->partition[0].eod_frame_ppos)); | |
2515 | printk(OSST_DEB_MSG "%s:D: first mark on tape = %d, last = %d, eod frame = %d\n", | |
2516 | name, STp->first_mark_ppos, STp->last_mark_ppos, STp->eod_frame_ppos); | |
2517 | #endif | |
2518 | if (header->minor_rev < 4 && STp->linux_media_version == 4) { | |
2519 | #if DEBUG | |
2520 | printk(OSST_DEB_MSG "%s:D: Moving filemark list to ADR 1.4 location\n", name); | |
2521 | #endif | |
2522 | memcpy((void *)header->dat_fm_tab.fm_tab_ent, | |
2523 | (void *)header->old_filemark_list, sizeof(header->dat_fm_tab.fm_tab_ent)); | |
2524 | memset((void *)header->old_filemark_list, 0, sizeof(header->old_filemark_list)); | |
2525 | } | |
2526 | if (header->minor_rev == 4 && | |
2527 | (header->ext_trk_tb_off != htons(17192) || | |
2528 | header->partition[0].partition_num != OS_DATA_PARTITION || | |
2529 | header->partition[0].par_desc_ver != OS_PARTITION_VERSION || | |
2530 | header->partition[0].last_frame_ppos != htonl(STp->capacity) || | |
2531 | header->cfg_col_width != htonl(20) || | |
2532 | header->dat_col_width != htonl(1500) || | |
2533 | header->qfa_col_width != htonl(0) || | |
2534 | header->ext_track_tb.nr_stream_part != 1 || | |
2535 | header->ext_track_tb.et_ent_sz != 32 || | |
2536 | header->ext_track_tb.dat_ext_trk_ey.et_part_num != OS_DATA_PARTITION || | |
2537 | header->ext_track_tb.dat_ext_trk_ey.fmt != 1 || | |
2538 | header->ext_track_tb.dat_ext_trk_ey.fm_tab_off != htons(17736) || | |
2539 | header->ext_track_tb.dat_ext_trk_ey.last_hlb_hi != 0 || | |
2540 | header->ext_track_tb.dat_ext_trk_ey.last_pp != htonl(STp->eod_frame_ppos) || | |
2541 | header->dat_fm_tab.fm_part_num != OS_DATA_PARTITION || | |
2542 | header->dat_fm_tab.fm_tab_ent_sz != 4 || | |
2543 | header->dat_fm_tab.fm_tab_ent_cnt != | |
2544 | htons(STp->filemark_cnt<OS_FM_TAB_MAX?STp->filemark_cnt:OS_FM_TAB_MAX))) | |
2545 | printk(KERN_WARNING "%s:W: Failed consistency check ADR 1.4 format\n", name); | |
2546 | ||
2547 | } | |
2548 | ||
2549 | return 1; | |
2550 | } | |
2551 | ||
5e6575c0 | 2552 | static int osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2553 | { |
2554 | int position, ppos; | |
2555 | int first, last; | |
2556 | int valid = 0; | |
2557 | char * name = tape_name(STp); | |
2558 | ||
2559 | position = osst_get_frame_position(STp, aSRpnt); | |
2560 | ||
2561 | if (STp->raw) { | |
2562 | STp->header_ok = STp->linux_media = 1; | |
2563 | STp->linux_media_version = 0; | |
2564 | return 1; | |
2565 | } | |
2566 | STp->header_ok = STp->linux_media = STp->linux_media_version = 0; | |
2567 | STp->wrt_pass_cntr = STp->update_frame_cntr = -1; | |
2568 | STp->eod_frame_ppos = STp->first_data_ppos = -1; | |
2569 | STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1; | |
2570 | #if DEBUG | |
2571 | printk(OSST_DEB_MSG "%s:D: Reading header\n", name); | |
2572 | #endif | |
2573 | ||
2574 | /* optimization for speed - if we are positioned at ppos 10, read second group first */ | |
2575 | /* TODO try the ADR 1.1 locations for the second group if we have no valid one yet... */ | |
2576 | ||
2577 | first = position==10?0xbae: 5; | |
2578 | last = position==10?0xbb3:10; | |
2579 | ||
2580 | for (ppos = first; ppos < last; ppos++) | |
2581 | if (__osst_analyze_headers(STp, aSRpnt, ppos)) | |
2582 | valid = 1; | |
2583 | ||
2584 | first = position==10? 5:0xbae; | |
2585 | last = position==10?10:0xbb3; | |
2586 | ||
2587 | for (ppos = first; ppos < last; ppos++) | |
2588 | if (__osst_analyze_headers(STp, aSRpnt, ppos)) | |
2589 | valid = 1; | |
2590 | ||
2591 | if (!valid) { | |
2592 | printk(KERN_ERR "%s:E: Failed to find valid ADRL header, new media?\n", name); | |
2593 | STp->eod_frame_ppos = STp->first_data_ppos = 0; | |
2594 | osst_set_frame_position(STp, aSRpnt, 10, 0); | |
2595 | return 0; | |
2596 | } | |
2597 | if (position <= STp->first_data_ppos) { | |
2598 | position = STp->first_data_ppos; | |
2599 | STp->ps[0].drv_file = STp->ps[0].drv_block = STp->frame_seq_number = STp->logical_blk_num = 0; | |
2600 | } | |
2601 | osst_set_frame_position(STp, aSRpnt, position, 0); | |
2602 | STp->header_ok = 1; | |
2603 | ||
2604 | return 1; | |
2605 | } | |
2606 | ||
5e6575c0 | 2607 | static int osst_verify_position(struct osst_tape * STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2608 | { |
2609 | int frame_position = STp->first_frame_position; | |
2610 | int frame_seq_numbr = STp->frame_seq_number; | |
2611 | int logical_blk_num = STp->logical_blk_num; | |
2612 | int halfway_frame = STp->frame_in_buffer; | |
2613 | int read_pointer = STp->buffer->read_pointer; | |
2614 | int prev_mark_ppos = -1; | |
2615 | int actual_mark_ppos, i, n; | |
2616 | #if DEBUG | |
2617 | char * name = tape_name(STp); | |
2618 | ||
2619 | printk(OSST_DEB_MSG "%s:D: Verify that the tape is really the one we think before writing\n", name); | |
2620 | #endif | |
2621 | osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); | |
2622 | if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { | |
2623 | #if DEBUG | |
2624 | printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in verify_position\n", name); | |
2625 | #endif | |
2626 | return (-EIO); | |
2627 | } | |
2628 | if (STp->linux_media_version >= 4) { | |
2629 | for (i=0; i<STp->filemark_cnt; i++) | |
2630 | if ((n=ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i])) < frame_position) | |
2631 | prev_mark_ppos = n; | |
2632 | } else | |
2633 | prev_mark_ppos = frame_position - 1; /* usually - we don't really know */ | |
2634 | actual_mark_ppos = STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER ? | |
2635 | frame_position - 1 : ntohl(STp->buffer->aux->last_mark_ppos); | |
2636 | if (frame_position != STp->first_frame_position || | |
2637 | frame_seq_numbr != STp->frame_seq_number + (halfway_frame?0:1) || | |
2638 | prev_mark_ppos != actual_mark_ppos ) { | |
2639 | #if DEBUG | |
2640 | printk(OSST_DEB_MSG "%s:D: Block mismatch: fppos %d-%d, fseq %d-%d, mark %d-%d\n", name, | |
2641 | STp->first_frame_position, frame_position, | |
2642 | STp->frame_seq_number + (halfway_frame?0:1), | |
2643 | frame_seq_numbr, actual_mark_ppos, prev_mark_ppos); | |
2644 | #endif | |
2645 | return (-EIO); | |
2646 | } | |
2647 | if (halfway_frame) { | |
2648 | /* prepare buffer for append and rewrite on top of original */ | |
2649 | osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); | |
2650 | STp->buffer->buffer_bytes = read_pointer; | |
2651 | STp->ps[STp->partition].rw = ST_WRITING; | |
2652 | STp->dirty = 1; | |
2653 | } | |
2654 | STp->frame_in_buffer = halfway_frame; | |
2655 | STp->frame_seq_number = frame_seq_numbr; | |
2656 | STp->logical_blk_num = logical_blk_num; | |
2657 | return 0; | |
2658 | } | |
2659 | ||
2660 | /* Acc. to OnStream, the vers. numbering is the following: | |
2661 | * X.XX for released versions (X=digit), | |
2662 | * XXXY for unreleased versions (Y=letter) | |
2663 | * Ordering 1.05 < 106A < 106B < ... < 106a < ... < 1.06 | |
2664 | * This fn makes monoton numbers out of this scheme ... | |
2665 | */ | |
2666 | static unsigned int osst_parse_firmware_rev (const char * str) | |
2667 | { | |
2668 | if (str[1] == '.') { | |
2669 | return (str[0]-'0')*10000 | |
2670 | +(str[2]-'0')*1000 | |
2671 | +(str[3]-'0')*100; | |
2672 | } else { | |
2673 | return (str[0]-'0')*10000 | |
2674 | +(str[1]-'0')*1000 | |
2675 | +(str[2]-'0')*100 - 100 | |
2676 | +(str[3]-'@'); | |
2677 | } | |
2678 | } | |
2679 | ||
2680 | /* | |
2681 | * Configure the OnStream SCII tape drive for default operation | |
2682 | */ | |
5e6575c0 | 2683 | static int osst_configure_onstream(struct osst_tape *STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2684 | { |
2685 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
2686 | char * name = tape_name(STp); | |
5e6575c0 | 2687 | struct osst_request * SRpnt = * aSRpnt; |
1da177e4 LT |
2688 | osst_mode_parameter_header_t * header; |
2689 | osst_block_size_page_t * bs; | |
2690 | osst_capabilities_page_t * cp; | |
2691 | osst_tape_paramtr_page_t * prm; | |
2692 | int drive_buffer_size; | |
2693 | ||
2694 | if (STp->ready != ST_READY) { | |
2695 | #if DEBUG | |
2696 | printk(OSST_DEB_MSG "%s:D: Not Ready\n", name); | |
2697 | #endif | |
2698 | return (-EIO); | |
2699 | } | |
2700 | ||
2701 | if (STp->os_fw_rev < 10600) { | |
2702 | printk(KERN_INFO "%s:I: Old OnStream firmware revision detected (%s),\n", name, STp->device->rev); | |
2703 | printk(KERN_INFO "%s:I: an upgrade to version 1.06 or above is recommended\n", name); | |
2704 | } | |
2705 | ||
2706 | /* | |
2707 | * Configure 32.5KB (data+aux) frame size. | |
2708 | * Get the current frame size from the block size mode page | |
2709 | */ | |
2710 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
2711 | cmd[0] = MODE_SENSE; | |
2712 | cmd[1] = 8; | |
2713 | cmd[2] = BLOCK_SIZE_PAGE; | |
2714 | cmd[4] = BLOCK_SIZE_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
2715 | ||
2716 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); | |
2717 | if (SRpnt == NULL) { | |
2718 | #if DEBUG | |
2719 | printk(OSST_DEB_MSG "osst :D: Busy\n"); | |
2720 | #endif | |
2721 | return (-EBUSY); | |
2722 | } | |
2723 | *aSRpnt = SRpnt; | |
2724 | if ((STp->buffer)->syscall_result != 0) { | |
2725 | printk (KERN_ERR "%s:E: Can't get tape block size mode page\n", name); | |
2726 | return (-EIO); | |
2727 | } | |
2728 | ||
2729 | header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; | |
2730 | bs = (osst_block_size_page_t *) ((STp->buffer)->b_data + sizeof(osst_mode_parameter_header_t) + header->bdl); | |
2731 | ||
2732 | #if DEBUG | |
2733 | printk(OSST_DEB_MSG "%s:D: 32KB play back: %s\n", name, bs->play32 ? "Yes" : "No"); | |
2734 | printk(OSST_DEB_MSG "%s:D: 32.5KB play back: %s\n", name, bs->play32_5 ? "Yes" : "No"); | |
2735 | printk(OSST_DEB_MSG "%s:D: 32KB record: %s\n", name, bs->record32 ? "Yes" : "No"); | |
2736 | printk(OSST_DEB_MSG "%s:D: 32.5KB record: %s\n", name, bs->record32_5 ? "Yes" : "No"); | |
2737 | #endif | |
2738 | ||
2739 | /* | |
2740 | * Configure default auto columns mode, 32.5KB transfer mode | |
2741 | */ | |
2742 | bs->one = 1; | |
2743 | bs->play32 = 0; | |
2744 | bs->play32_5 = 1; | |
2745 | bs->record32 = 0; | |
2746 | bs->record32_5 = 1; | |
2747 | ||
2748 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
2749 | cmd[0] = MODE_SELECT; | |
2750 | cmd[1] = 0x10; | |
2751 | cmd[4] = BLOCK_SIZE_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
2752 | ||
2753 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); | |
2754 | *aSRpnt = SRpnt; | |
2755 | if ((STp->buffer)->syscall_result != 0) { | |
2756 | printk (KERN_ERR "%s:E: Couldn't set tape block size mode page\n", name); | |
2757 | return (-EIO); | |
2758 | } | |
2759 | ||
2760 | #if DEBUG | |
2761 | printk(KERN_INFO "%s:D: Drive Block Size changed to 32.5K\n", name); | |
2762 | /* | |
2763 | * In debug mode, we want to see as many errors as possible | |
2764 | * to test the error recovery mechanism. | |
2765 | */ | |
2766 | osst_set_retries(STp, aSRpnt, 0); | |
2767 | SRpnt = * aSRpnt; | |
2768 | #endif | |
2769 | ||
2770 | /* | |
2771 | * Set vendor name to 'LIN4' for "Linux support version 4". | |
2772 | */ | |
2773 | ||
2774 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
2775 | cmd[0] = MODE_SELECT; | |
2776 | cmd[1] = 0x10; | |
2777 | cmd[4] = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
2778 | ||
2779 | header->mode_data_length = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH - 1; | |
2780 | header->medium_type = 0; /* Medium Type - ignoring */ | |
2781 | header->dsp = 0; /* Reserved */ | |
2782 | header->bdl = 0; /* Block Descriptor Length */ | |
2783 | ||
2784 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = VENDOR_IDENT_PAGE | (1 << 7); | |
2785 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 6; | |
2786 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 'L'; | |
2787 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 'I'; | |
2788 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 4] = 'N'; | |
2789 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 5] = '4'; | |
2790 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 6] = 0; | |
2791 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 7] = 0; | |
2792 | ||
2793 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); | |
2794 | *aSRpnt = SRpnt; | |
2795 | ||
2796 | if ((STp->buffer)->syscall_result != 0) { | |
2797 | printk (KERN_ERR "%s:E: Couldn't set vendor name to %s\n", name, | |
2798 | (char *) ((STp->buffer)->b_data + MODE_HEADER_LENGTH + 2)); | |
2799 | return (-EIO); | |
2800 | } | |
2801 | ||
2802 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
2803 | cmd[0] = MODE_SENSE; | |
2804 | cmd[1] = 8; | |
2805 | cmd[2] = CAPABILITIES_PAGE; | |
2806 | cmd[4] = CAPABILITIES_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
2807 | ||
2808 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); | |
2809 | *aSRpnt = SRpnt; | |
2810 | ||
2811 | if ((STp->buffer)->syscall_result != 0) { | |
2812 | printk (KERN_ERR "%s:E: Can't get capabilities page\n", name); | |
2813 | return (-EIO); | |
2814 | } | |
2815 | ||
2816 | header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; | |
2817 | cp = (osst_capabilities_page_t *) ((STp->buffer)->b_data + | |
2818 | sizeof(osst_mode_parameter_header_t) + header->bdl); | |
2819 | ||
2820 | drive_buffer_size = ntohs(cp->buffer_size) / 2; | |
2821 | ||
2822 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
2823 | cmd[0] = MODE_SENSE; | |
2824 | cmd[1] = 8; | |
2825 | cmd[2] = TAPE_PARAMTR_PAGE; | |
2826 | cmd[4] = TAPE_PARAMTR_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
2827 | ||
2828 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); | |
2829 | *aSRpnt = SRpnt; | |
2830 | ||
2831 | if ((STp->buffer)->syscall_result != 0) { | |
2832 | printk (KERN_ERR "%s:E: Can't get tape parameter page\n", name); | |
2833 | return (-EIO); | |
2834 | } | |
2835 | ||
2836 | header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; | |
2837 | prm = (osst_tape_paramtr_page_t *) ((STp->buffer)->b_data + | |
2838 | sizeof(osst_mode_parameter_header_t) + header->bdl); | |
2839 | ||
2840 | STp->density = prm->density; | |
2841 | STp->capacity = ntohs(prm->segtrk) * ntohs(prm->trks); | |
2842 | #if DEBUG | |
2843 | printk(OSST_DEB_MSG "%s:D: Density %d, tape length: %dMB, drive buffer size: %dKB\n", | |
2844 | name, STp->density, STp->capacity / 32, drive_buffer_size); | |
2845 | #endif | |
2846 | ||
2847 | return 0; | |
2848 | ||
2849 | } | |
2850 | ||
2851 | ||
2852 | /* Step over EOF if it has been inadvertently crossed (ioctl not used because | |
2853 | it messes up the block number). */ | |
5e6575c0 | 2854 | static int cross_eof(struct osst_tape *STp, struct osst_request ** aSRpnt, int forward) |
1da177e4 LT |
2855 | { |
2856 | int result; | |
2857 | char * name = tape_name(STp); | |
2858 | ||
2859 | #if DEBUG | |
2860 | if (debugging) | |
2861 | printk(OSST_DEB_MSG "%s:D: Stepping over filemark %s.\n", | |
2862 | name, forward ? "forward" : "backward"); | |
2863 | #endif | |
2864 | ||
2865 | if (forward) { | |
2866 | /* assumes that the filemark is already read by the drive, so this is low cost */ | |
2867 | result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1); | |
2868 | } | |
2869 | else | |
2870 | /* assumes this is only called if we just read the filemark! */ | |
2871 | result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1); | |
2872 | ||
2873 | if (result < 0) | |
2874 | printk(KERN_WARNING "%s:W: Stepping over filemark %s failed.\n", | |
2875 | name, forward ? "forward" : "backward"); | |
2876 | ||
2877 | return result; | |
2878 | } | |
2879 | ||
2880 | ||
2881 | /* Get the tape position. */ | |
2882 | ||
5e6575c0 | 2883 | static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
2884 | { |
2885 | unsigned char scmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 2886 | struct osst_request * SRpnt; |
1da177e4 LT |
2887 | int result = 0; |
2888 | char * name = tape_name(STp); | |
2889 | ||
2890 | /* KG: We want to be able to use it for checking Write Buffer availability | |
2891 | * and thus don't want to risk to overwrite anything. Exchange buffers ... */ | |
2892 | char mybuf[24]; | |
2893 | char * olddata = STp->buffer->b_data; | |
2894 | int oldsize = STp->buffer->buffer_size; | |
2895 | ||
2896 | if (STp->ready != ST_READY) return (-EIO); | |
2897 | ||
2898 | memset (scmd, 0, MAX_COMMAND_SIZE); | |
2899 | scmd[0] = READ_POSITION; | |
2900 | ||
2901 | STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; | |
2902 | SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, DMA_FROM_DEVICE, | |
2903 | STp->timeout, MAX_RETRIES, 1); | |
2904 | if (!SRpnt) { | |
2905 | STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; | |
2906 | return (-EBUSY); | |
2907 | } | |
2908 | *aSRpnt = SRpnt; | |
2909 | ||
2910 | if (STp->buffer->syscall_result) | |
5e6575c0 | 2911 | result = ((SRpnt->sense[2] & 0x0f) == 3) ? -EIO : -EINVAL; /* 3: Write Error */ |
1da177e4 LT |
2912 | |
2913 | if (result == -EINVAL) | |
2914 | printk(KERN_ERR "%s:E: Can't read tape position.\n", name); | |
2915 | else { | |
2916 | if (result == -EIO) { /* re-read position - this needs to preserve media errors */ | |
2917 | unsigned char mysense[16]; | |
5e6575c0 | 2918 | memcpy (mysense, SRpnt->sense, 16); |
1da177e4 LT |
2919 | memset (scmd, 0, MAX_COMMAND_SIZE); |
2920 | scmd[0] = READ_POSITION; | |
2921 | STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; | |
2922 | SRpnt = osst_do_scsi(SRpnt, STp, scmd, 20, DMA_FROM_DEVICE, | |
2923 | STp->timeout, MAX_RETRIES, 1); | |
2924 | #if DEBUG | |
2925 | printk(OSST_DEB_MSG "%s:D: Reread position, reason=[%02x:%02x:%02x], result=[%s%02x:%02x:%02x]\n", | |
2926 | name, mysense[2], mysense[12], mysense[13], STp->buffer->syscall_result?"":"ok:", | |
5e6575c0 | 2927 | SRpnt->sense[2],SRpnt->sense[12],SRpnt->sense[13]); |
1da177e4 LT |
2928 | #endif |
2929 | if (!STp->buffer->syscall_result) | |
5e6575c0 | 2930 | memcpy (SRpnt->sense, mysense, 16); |
1da177e4 LT |
2931 | else |
2932 | printk(KERN_WARNING "%s:W: Double error in get position\n", name); | |
2933 | } | |
2934 | STp->first_frame_position = ((STp->buffer)->b_data[4] << 24) | |
2935 | + ((STp->buffer)->b_data[5] << 16) | |
2936 | + ((STp->buffer)->b_data[6] << 8) | |
2937 | + (STp->buffer)->b_data[7]; | |
2938 | STp->last_frame_position = ((STp->buffer)->b_data[ 8] << 24) | |
2939 | + ((STp->buffer)->b_data[ 9] << 16) | |
2940 | + ((STp->buffer)->b_data[10] << 8) | |
2941 | + (STp->buffer)->b_data[11]; | |
2942 | STp->cur_frames = (STp->buffer)->b_data[15]; | |
2943 | #if DEBUG | |
2944 | if (debugging) { | |
2945 | printk(OSST_DEB_MSG "%s:D: Drive Positions: host %d, tape %d%s, buffer %d\n", name, | |
2946 | STp->first_frame_position, STp->last_frame_position, | |
2947 | ((STp->buffer)->b_data[0]&0x80)?" (BOP)": | |
2948 | ((STp->buffer)->b_data[0]&0x40)?" (EOP)":"", | |
2949 | STp->cur_frames); | |
2950 | } | |
2951 | #endif | |
2952 | if (STp->cur_frames == 0 && STp->first_frame_position != STp->last_frame_position) { | |
2953 | #if DEBUG | |
2954 | printk(OSST_DEB_MSG "%s:D: Correcting read position %d, %d, %d\n", name, | |
2955 | STp->first_frame_position, STp->last_frame_position, STp->cur_frames); | |
2956 | #endif | |
2957 | STp->first_frame_position = STp->last_frame_position; | |
2958 | } | |
2959 | } | |
2960 | STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; | |
2961 | ||
2962 | return (result == 0 ? STp->first_frame_position : result); | |
2963 | } | |
2964 | ||
2965 | ||
2966 | /* Set the tape block */ | |
5e6575c0 | 2967 | static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int ppos, int skip) |
1da177e4 LT |
2968 | { |
2969 | unsigned char scmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 2970 | struct osst_request * SRpnt; |
1da177e4 LT |
2971 | struct st_partstat * STps; |
2972 | int result = 0; | |
2973 | int pp = (ppos == 3000 && !skip)? 0 : ppos; | |
2974 | char * name = tape_name(STp); | |
2975 | ||
2976 | if (STp->ready != ST_READY) return (-EIO); | |
2977 | ||
2978 | STps = &(STp->ps[STp->partition]); | |
2979 | ||
2980 | if (ppos < 0 || ppos > STp->capacity) { | |
2981 | printk(KERN_WARNING "%s:W: Reposition request %d out of range\n", name, ppos); | |
2982 | pp = ppos = ppos < 0 ? 0 : (STp->capacity - 1); | |
2983 | result = (-EINVAL); | |
2984 | } | |
2985 | ||
2986 | do { | |
2987 | #if DEBUG | |
2988 | if (debugging) | |
2989 | printk(OSST_DEB_MSG "%s:D: Setting ppos to %d.\n", name, pp); | |
2990 | #endif | |
2991 | memset (scmd, 0, MAX_COMMAND_SIZE); | |
2992 | scmd[0] = SEEK_10; | |
2993 | scmd[1] = 1; | |
2994 | scmd[3] = (pp >> 24); | |
2995 | scmd[4] = (pp >> 16); | |
2996 | scmd[5] = (pp >> 8); | |
2997 | scmd[6] = pp; | |
2998 | if (skip) | |
2999 | scmd[9] = 0x80; | |
3000 | ||
3001 | SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, DMA_NONE, STp->long_timeout, | |
3002 | MAX_RETRIES, 1); | |
3003 | if (!SRpnt) | |
3004 | return (-EBUSY); | |
3005 | *aSRpnt = SRpnt; | |
3006 | ||
3007 | if ((STp->buffer)->syscall_result != 0) { | |
3008 | #if DEBUG | |
3009 | printk(OSST_DEB_MSG "%s:D: SEEK command from %d to %d failed.\n", | |
3010 | name, STp->first_frame_position, pp); | |
3011 | #endif | |
3012 | result = (-EIO); | |
3013 | } | |
3014 | if (pp != ppos) | |
3015 | osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE); | |
3016 | } while ((pp != ppos) && (pp = ppos)); | |
3017 | STp->first_frame_position = STp->last_frame_position = ppos; | |
3018 | STps->eof = ST_NOEOF; | |
3019 | STps->at_sm = 0; | |
3020 | STps->rw = ST_IDLE; | |
3021 | STp->frame_in_buffer = 0; | |
3022 | return result; | |
3023 | } | |
3024 | ||
5e6575c0 | 3025 | static int osst_write_trailer(struct osst_tape *STp, struct osst_request ** aSRpnt, int leave_at_EOT) |
1da177e4 LT |
3026 | { |
3027 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
3028 | int result = 0; | |
3029 | ||
3030 | if (STp->write_type != OS_WRITE_NEW_MARK) { | |
3031 | /* true unless the user wrote the filemark for us */ | |
3032 | result = osst_flush_drive_buffer(STp, aSRpnt); | |
3033 | if (result < 0) goto out; | |
3034 | result = osst_write_filemark(STp, aSRpnt); | |
3035 | if (result < 0) goto out; | |
3036 | ||
3037 | if (STps->drv_file >= 0) | |
3038 | STps->drv_file++ ; | |
3039 | STps->drv_block = 0; | |
3040 | } | |
3041 | result = osst_write_eod(STp, aSRpnt); | |
3042 | osst_write_header(STp, aSRpnt, leave_at_EOT); | |
3043 | ||
3044 | STps->eof = ST_FM; | |
3045 | out: | |
3046 | return result; | |
3047 | } | |
3048 | \f | |
3049 | /* osst versions of st functions - augmented and stripped to suit OnStream only */ | |
3050 | ||
3051 | /* Flush the write buffer (never need to write if variable blocksize). */ | |
5e6575c0 | 3052 | static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt) |
1da177e4 LT |
3053 | { |
3054 | int offset, transfer, blks = 0; | |
3055 | int result = 0; | |
3056 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 3057 | struct osst_request * SRpnt = *aSRpnt; |
1da177e4 LT |
3058 | struct st_partstat * STps; |
3059 | char * name = tape_name(STp); | |
3060 | ||
3061 | if ((STp->buffer)->writing) { | |
3062 | if (SRpnt == (STp->buffer)->last_SRpnt) | |
3063 | #if DEBUG | |
3064 | { printk(OSST_DEB_MSG | |
5e6575c0 | 3065 | "%s:D: aSRpnt points to osst_request that write_behind_check will release -- cleared\n", name); |
1da177e4 LT |
3066 | #endif |
3067 | *aSRpnt = SRpnt = NULL; | |
3068 | #if DEBUG | |
3069 | } else if (SRpnt) | |
3070 | printk(OSST_DEB_MSG | |
5e6575c0 | 3071 | "%s:D: aSRpnt does not point to osst_request that write_behind_check will release -- strange\n", name); |
1da177e4 LT |
3072 | #endif |
3073 | osst_write_behind_check(STp); | |
3074 | if ((STp->buffer)->syscall_result) { | |
3075 | #if DEBUG | |
3076 | if (debugging) | |
3077 | printk(OSST_DEB_MSG "%s:D: Async write error (flush) %x.\n", | |
3078 | name, (STp->buffer)->midlevel_result); | |
3079 | #endif | |
3080 | if ((STp->buffer)->midlevel_result == INT_MAX) | |
3081 | return (-ENOSPC); | |
3082 | return (-EIO); | |
3083 | } | |
3084 | } | |
3085 | ||
3086 | result = 0; | |
3087 | if (STp->dirty == 1) { | |
3088 | ||
3089 | STp->write_count++; | |
3090 | STps = &(STp->ps[STp->partition]); | |
3091 | STps->rw = ST_WRITING; | |
3092 | offset = STp->buffer->buffer_bytes; | |
3093 | blks = (offset + STp->block_size - 1) / STp->block_size; | |
3094 | transfer = OS_FRAME_SIZE; | |
3095 | ||
3096 | if (offset < OS_DATA_SIZE) | |
3097 | osst_zero_buffer_tail(STp->buffer); | |
3098 | ||
3099 | if (STp->poll) | |
3100 | if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120)) | |
3101 | result = osst_recover_wait_frame(STp, aSRpnt, 1); | |
3102 | ||
3103 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
3104 | cmd[0] = WRITE_6; | |
3105 | cmd[1] = 1; | |
3106 | cmd[4] = 1; | |
3107 | ||
3108 | switch (STp->write_type) { | |
3109 | case OS_WRITE_DATA: | |
3110 | #if DEBUG | |
3111 | if (debugging) | |
3112 | printk(OSST_DEB_MSG "%s:D: Writing %d blocks to frame %d, lblks %d-%d\n", | |
3113 | name, blks, STp->frame_seq_number, | |
3114 | STp->logical_blk_num - blks, STp->logical_blk_num - 1); | |
3115 | #endif | |
3116 | osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++, | |
3117 | STp->logical_blk_num - blks, STp->block_size, blks); | |
3118 | break; | |
3119 | case OS_WRITE_EOD: | |
3120 | osst_init_aux(STp, OS_FRAME_TYPE_EOD, STp->frame_seq_number++, | |
3121 | STp->logical_blk_num, 0, 0); | |
3122 | break; | |
3123 | case OS_WRITE_NEW_MARK: | |
3124 | osst_init_aux(STp, OS_FRAME_TYPE_MARKER, STp->frame_seq_number++, | |
3125 | STp->logical_blk_num++, 0, blks=1); | |
3126 | break; | |
3127 | case OS_WRITE_HEADER: | |
3128 | osst_init_aux(STp, OS_FRAME_TYPE_HEADER, 0, 0, 0, blks=0); | |
3129 | break; | |
3130 | default: /* probably FILLER */ | |
3131 | osst_init_aux(STp, OS_FRAME_TYPE_FILL, 0, 0, 0, 0); | |
3132 | } | |
3133 | #if DEBUG | |
3134 | if (debugging) | |
25985edc | 3135 | printk(OSST_DEB_MSG "%s:D: Flushing %d bytes, Transferring %d bytes in %d lblocks.\n", |
1da177e4 LT |
3136 | name, offset, transfer, blks); |
3137 | #endif | |
3138 | ||
3139 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, DMA_TO_DEVICE, | |
3140 | STp->timeout, MAX_RETRIES, 1); | |
3141 | *aSRpnt = SRpnt; | |
3142 | if (!SRpnt) | |
3143 | return (-EBUSY); | |
3144 | ||
3145 | if ((STp->buffer)->syscall_result != 0) { | |
3146 | #if DEBUG | |
3147 | printk(OSST_DEB_MSG | |
3148 | "%s:D: write sense [0]=0x%02x [2]=%02x [12]=%02x [13]=%02x\n", | |
5e6575c0 WR |
3149 | name, SRpnt->sense[0], SRpnt->sense[2], |
3150 | SRpnt->sense[12], SRpnt->sense[13]); | |
1da177e4 | 3151 | #endif |
5e6575c0 WR |
3152 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
3153 | (SRpnt->sense[2] & 0x40) && /* FIXME - SC-30 drive doesn't assert EOM bit */ | |
3154 | (SRpnt->sense[2] & 0x0f) == NO_SENSE) { | |
1da177e4 LT |
3155 | STp->dirty = 0; |
3156 | (STp->buffer)->buffer_bytes = 0; | |
3157 | result = (-ENOSPC); | |
3158 | } | |
3159 | else { | |
3160 | if (osst_write_error_recovery(STp, aSRpnt, 1)) { | |
3161 | printk(KERN_ERR "%s:E: Error on flush write.\n", name); | |
3162 | result = (-EIO); | |
3163 | } | |
3164 | } | |
3165 | STps->drv_block = (-1); /* FIXME - even if write recovery succeeds? */ | |
3166 | } | |
3167 | else { | |
3168 | STp->first_frame_position++; | |
3169 | STp->dirty = 0; | |
3170 | (STp->buffer)->buffer_bytes = 0; | |
3171 | } | |
3172 | } | |
3173 | #if DEBUG | |
3174 | printk(OSST_DEB_MSG "%s:D: Exit flush write buffer with code %d\n", name, result); | |
3175 | #endif | |
3176 | return result; | |
3177 | } | |
3178 | ||
3179 | ||
3180 | /* Flush the tape buffer. The tape will be positioned correctly unless | |
3181 | seek_next is true. */ | |
5e6575c0 | 3182 | static int osst_flush_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt, int seek_next) |
1da177e4 LT |
3183 | { |
3184 | struct st_partstat * STps; | |
3185 | int backspace = 0, result = 0; | |
3186 | #if DEBUG | |
3187 | char * name = tape_name(STp); | |
3188 | #endif | |
3189 | ||
3190 | /* | |
3191 | * If there was a bus reset, block further access | |
3192 | * to this device. | |
3193 | */ | |
3194 | if( STp->pos_unknown) | |
3195 | return (-EIO); | |
3196 | ||
3197 | if (STp->ready != ST_READY) | |
3198 | return 0; | |
3199 | ||
3200 | STps = &(STp->ps[STp->partition]); | |
3201 | if (STps->rw == ST_WRITING || STp->dirty) { /* Writing */ | |
3202 | STp->write_type = OS_WRITE_DATA; | |
3203 | return osst_flush_write_buffer(STp, aSRpnt); | |
3204 | } | |
3205 | if (STp->block_size == 0) | |
3206 | return 0; | |
3207 | ||
3208 | #if DEBUG | |
3209 | printk(OSST_DEB_MSG "%s:D: Reached flush (read) buffer\n", name); | |
3210 | #endif | |
3211 | ||
3212 | if (!STp->can_bsr) { | |
3213 | backspace = ((STp->buffer)->buffer_bytes + (STp->buffer)->read_pointer) / STp->block_size - | |
3214 | ((STp->buffer)->read_pointer + STp->block_size - 1 ) / STp->block_size ; | |
3215 | (STp->buffer)->buffer_bytes = 0; | |
3216 | (STp->buffer)->read_pointer = 0; | |
3217 | STp->frame_in_buffer = 0; /* FIXME is this relevant w. OSST? */ | |
3218 | } | |
3219 | ||
3220 | if (!seek_next) { | |
3221 | if (STps->eof == ST_FM_HIT) { | |
3222 | result = cross_eof(STp, aSRpnt, 0); /* Back over the EOF hit */ | |
3223 | if (!result) | |
3224 | STps->eof = ST_NOEOF; | |
3225 | else { | |
3226 | if (STps->drv_file >= 0) | |
3227 | STps->drv_file++; | |
3228 | STps->drv_block = 0; | |
3229 | } | |
3230 | } | |
3231 | if (!result && backspace > 0) /* TODO -- design and run a test case for this */ | |
3232 | result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace); | |
3233 | } | |
3234 | else if (STps->eof == ST_FM_HIT) { | |
3235 | if (STps->drv_file >= 0) | |
3236 | STps->drv_file++; | |
3237 | STps->drv_block = 0; | |
3238 | STps->eof = ST_NOEOF; | |
3239 | } | |
3240 | ||
3241 | return result; | |
3242 | } | |
3243 | ||
5e6575c0 | 3244 | static int osst_write_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int synchronous) |
1da177e4 LT |
3245 | { |
3246 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 3247 | struct osst_request * SRpnt; |
1da177e4 LT |
3248 | int blks; |
3249 | #if DEBUG | |
3250 | char * name = tape_name(STp); | |
3251 | #endif | |
3252 | ||
3253 | if ((!STp-> raw) && (STp->first_frame_position == 0xbae)) { /* _must_ preserve buffer! */ | |
3254 | #if DEBUG | |
3255 | printk(OSST_DEB_MSG "%s:D: Reaching config partition.\n", name); | |
3256 | #endif | |
3257 | if (osst_flush_drive_buffer(STp, aSRpnt) < 0) { | |
3258 | return (-EIO); | |
3259 | } | |
3260 | /* error recovery may have bumped us past the header partition */ | |
3261 | if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) { | |
3262 | #if DEBUG | |
3263 | printk(OSST_DEB_MSG "%s:D: Skipping over config partition.\n", name); | |
3264 | #endif | |
3265 | osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8); | |
3266 | } | |
3267 | } | |
3268 | ||
3269 | if (STp->poll) | |
3270 | if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -48, 120)) | |
3271 | if (osst_recover_wait_frame(STp, aSRpnt, 1)) | |
3272 | return (-EIO); | |
3273 | ||
3274 | // osst_build_stats(STp, &SRpnt); | |
3275 | ||
3276 | STp->ps[STp->partition].rw = ST_WRITING; | |
3277 | STp->write_type = OS_WRITE_DATA; | |
3278 | ||
3279 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
3280 | cmd[0] = WRITE_6; | |
3281 | cmd[1] = 1; | |
3282 | cmd[4] = 1; /* one frame at a time... */ | |
3283 | blks = STp->buffer->buffer_bytes / STp->block_size; | |
3284 | #if DEBUG | |
3285 | if (debugging) | |
3286 | printk(OSST_DEB_MSG "%s:D: Writing %d blocks to frame %d, lblks %d-%d\n", name, blks, | |
3287 | STp->frame_seq_number, STp->logical_blk_num - blks, STp->logical_blk_num - 1); | |
3288 | #endif | |
3289 | osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++, | |
3290 | STp->logical_blk_num - blks, STp->block_size, blks); | |
3291 | ||
3292 | #if DEBUG | |
3293 | if (!synchronous) | |
3294 | STp->write_pending = 1; | |
3295 | #endif | |
3296 | SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, STp->timeout, | |
3297 | MAX_RETRIES, synchronous); | |
3298 | if (!SRpnt) | |
3299 | return (-EBUSY); | |
3300 | *aSRpnt = SRpnt; | |
3301 | ||
3302 | if (synchronous) { | |
3303 | if (STp->buffer->syscall_result != 0) { | |
3304 | #if DEBUG | |
3305 | if (debugging) | |
3306 | printk(OSST_DEB_MSG "%s:D: Error on write:\n", name); | |
3307 | #endif | |
5e6575c0 WR |
3308 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
3309 | (SRpnt->sense[2] & 0x40)) { | |
3310 | if ((SRpnt->sense[2] & 0x0f) == VOLUME_OVERFLOW) | |
1da177e4 LT |
3311 | return (-ENOSPC); |
3312 | } | |
3313 | else { | |
3314 | if (osst_write_error_recovery(STp, aSRpnt, 1)) | |
3315 | return (-EIO); | |
3316 | } | |
3317 | } | |
3318 | else | |
3319 | STp->first_frame_position++; | |
3320 | } | |
3321 | ||
3322 | STp->write_count++; | |
3323 | ||
3324 | return 0; | |
3325 | } | |
3326 | ||
5e6575c0 | 3327 | /* Lock or unlock the drive door. Don't use when struct osst_request allocated. */ |
1da177e4 LT |
3328 | static int do_door_lock(struct osst_tape * STp, int do_lock) |
3329 | { | |
2b3b3d61 | 3330 | int retval; |
1da177e4 | 3331 | |
1da177e4 LT |
3332 | #if DEBUG |
3333 | printk(OSST_DEB_MSG "%s:D: %socking drive door.\n", tape_name(STp), do_lock ? "L" : "Unl"); | |
3334 | #endif | |
2b3b3d61 CH |
3335 | |
3336 | retval = scsi_set_medium_removal(STp->device, | |
3337 | do_lock ? SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); | |
3338 | if (!retval) | |
1da177e4 | 3339 | STp->door_locked = do_lock ? ST_LOCKED_EXPLICIT : ST_UNLOCKED; |
2b3b3d61 | 3340 | else |
1da177e4 | 3341 | STp->door_locked = ST_LOCK_FAILS; |
1da177e4 LT |
3342 | return retval; |
3343 | } | |
3344 | ||
3345 | /* Set the internal state after reset */ | |
3346 | static void reset_state(struct osst_tape *STp) | |
3347 | { | |
3348 | int i; | |
3349 | struct st_partstat *STps; | |
3350 | ||
3351 | STp->pos_unknown = 0; | |
3352 | for (i = 0; i < ST_NBR_PARTITIONS; i++) { | |
3353 | STps = &(STp->ps[i]); | |
3354 | STps->rw = ST_IDLE; | |
3355 | STps->eof = ST_NOEOF; | |
3356 | STps->at_sm = 0; | |
3357 | STps->last_block_valid = 0; | |
3358 | STps->drv_block = -1; | |
3359 | STps->drv_file = -1; | |
3360 | } | |
3361 | } | |
3362 | ||
3363 | \f | |
3364 | /* Entry points to osst */ | |
3365 | ||
3366 | /* Write command */ | |
3367 | static ssize_t osst_write(struct file * filp, const char __user * buf, size_t count, loff_t *ppos) | |
3368 | { | |
3369 | ssize_t total, retval = 0; | |
3370 | ssize_t i, do_count, blks, transfer; | |
3371 | int write_threshold; | |
3372 | int doing_write = 0; | |
3373 | const char __user * b_point; | |
5e6575c0 | 3374 | struct osst_request * SRpnt = NULL; |
1da177e4 LT |
3375 | struct st_modedef * STm; |
3376 | struct st_partstat * STps; | |
3377 | struct osst_tape * STp = filp->private_data; | |
3378 | char * name = tape_name(STp); | |
3379 | ||
3380 | ||
4390e601 | 3381 | if (mutex_lock_interruptible(&STp->lock)) |
1da177e4 LT |
3382 | return (-ERESTARTSYS); |
3383 | ||
3384 | /* | |
3385 | * If we are in the middle of error recovery, don't let anyone | |
3386 | * else try and use this device. Also, if error recovery fails, it | |
3387 | * may try and take the device offline, in which case all further | |
3388 | * access to the device is prohibited. | |
3389 | */ | |
3390 | if( !scsi_block_when_processing_errors(STp->device) ) { | |
3391 | retval = (-ENXIO); | |
3392 | goto out; | |
3393 | } | |
3394 | ||
3395 | if (STp->ready != ST_READY) { | |
3396 | if (STp->ready == ST_NO_TAPE) | |
3397 | retval = (-ENOMEDIUM); | |
3398 | else | |
3399 | retval = (-EIO); | |
3400 | goto out; | |
3401 | } | |
3402 | STm = &(STp->modes[STp->current_mode]); | |
3403 | if (!STm->defined) { | |
3404 | retval = (-ENXIO); | |
3405 | goto out; | |
3406 | } | |
3407 | if (count == 0) | |
3408 | goto out; | |
3409 | ||
3410 | /* | |
3411 | * If there was a bus reset, block further access | |
3412 | * to this device. | |
3413 | */ | |
3414 | if (STp->pos_unknown) { | |
3415 | retval = (-EIO); | |
3416 | goto out; | |
3417 | } | |
3418 | ||
3419 | #if DEBUG | |
3420 | if (!STp->in_use) { | |
3421 | printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); | |
3422 | retval = (-EIO); | |
3423 | goto out; | |
3424 | } | |
3425 | #endif | |
3426 | ||
3427 | if (STp->write_prot) { | |
3428 | retval = (-EACCES); | |
3429 | goto out; | |
3430 | } | |
3431 | ||
3432 | /* Write must be integral number of blocks */ | |
3433 | if (STp->block_size != 0 && (count % STp->block_size) != 0) { | |
3434 | printk(KERN_ERR "%s:E: Write (%Zd bytes) not multiple of tape block size (%d%c).\n", | |
3435 | name, count, STp->block_size<1024? | |
3436 | STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k'); | |
3437 | retval = (-EINVAL); | |
3438 | goto out; | |
3439 | } | |
3440 | ||
3441 | if (STp->first_frame_position >= STp->capacity - OSST_EOM_RESERVE) { | |
3442 | printk(KERN_ERR "%s:E: Write truncated at EOM early warning (frame %d).\n", | |
3443 | name, STp->first_frame_position); | |
3444 | retval = (-ENOSPC); | |
3445 | goto out; | |
3446 | } | |
3447 | ||
3448 | if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1)) | |
3449 | STp->door_locked = ST_LOCKED_AUTO; | |
3450 | ||
3451 | STps = &(STp->ps[STp->partition]); | |
3452 | ||
3453 | if (STps->rw == ST_READING) { | |
3454 | #if DEBUG | |
3455 | printk(OSST_DEB_MSG "%s:D: Switching from read to write at file %d, block %d\n", name, | |
3456 | STps->drv_file, STps->drv_block); | |
3457 | #endif | |
3458 | retval = osst_flush_buffer(STp, &SRpnt, 0); | |
3459 | if (retval) | |
3460 | goto out; | |
3461 | STps->rw = ST_IDLE; | |
3462 | } | |
3463 | if (STps->rw != ST_WRITING) { | |
3464 | /* Are we totally rewriting this tape? */ | |
3465 | if (!STp->header_ok || | |
3466 | (STp->first_frame_position == STp->first_data_ppos && STps->drv_block < 0) || | |
3467 | (STps->drv_file == 0 && STps->drv_block == 0)) { | |
3468 | STp->wrt_pass_cntr++; | |
3469 | #if DEBUG | |
3470 | printk(OSST_DEB_MSG "%s:D: Allocating next write pass counter: %d\n", | |
3471 | name, STp->wrt_pass_cntr); | |
3472 | #endif | |
3473 | osst_reset_header(STp, &SRpnt); | |
3474 | STps->drv_file = STps->drv_block = 0; | |
3475 | } | |
3476 | /* Do we know where we'll be writing on the tape? */ | |
3477 | else { | |
3478 | if ((STp->fast_open && osst_verify_position(STp, &SRpnt)) || | |
3479 | STps->drv_file < 0 || STps->drv_block < 0) { | |
3480 | if (STp->first_frame_position == STp->eod_frame_ppos) { /* at EOD */ | |
3481 | STps->drv_file = STp->filemark_cnt; | |
3482 | STps->drv_block = 0; | |
3483 | } | |
3484 | else { | |
3485 | /* We have no idea where the tape is positioned - give up */ | |
3486 | #if DEBUG | |
3487 | printk(OSST_DEB_MSG | |
3488 | "%s:D: Cannot write at indeterminate position.\n", name); | |
3489 | #endif | |
3490 | retval = (-EIO); | |
3491 | goto out; | |
3492 | } | |
3493 | } | |
3494 | if ((STps->drv_file + STps->drv_block) > 0 && STps->drv_file < STp->filemark_cnt) { | |
3495 | STp->filemark_cnt = STps->drv_file; | |
3496 | STp->last_mark_ppos = | |
3497 | ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt-1]); | |
3498 | printk(KERN_WARNING | |
3499 | "%s:W: Overwriting file %d with old write pass counter %d\n", | |
3500 | name, STps->drv_file, STp->wrt_pass_cntr); | |
3501 | printk(KERN_WARNING | |
3502 | "%s:W: may lead to stale data being accepted on reading back!\n", | |
3503 | name); | |
3504 | #if DEBUG | |
3505 | printk(OSST_DEB_MSG | |
3506 | "%s:D: resetting filemark count to %d and last mark ppos,lbn to %d,%d\n", | |
3507 | name, STp->filemark_cnt, STp->last_mark_ppos, STp->last_mark_lbn); | |
3508 | #endif | |
3509 | } | |
3510 | } | |
3511 | STp->fast_open = 0; | |
3512 | } | |
3513 | if (!STp->header_ok) { | |
3514 | #if DEBUG | |
3515 | printk(OSST_DEB_MSG "%s:D: Write cannot proceed without valid headers\n", name); | |
3516 | #endif | |
3517 | retval = (-EIO); | |
3518 | goto out; | |
3519 | } | |
3520 | ||
3521 | if ((STp->buffer)->writing) { | |
3522 | if (SRpnt) printk(KERN_ERR "%s:A: Not supposed to have SRpnt at line %d\n", name, __LINE__); | |
3523 | osst_write_behind_check(STp); | |
3524 | if ((STp->buffer)->syscall_result) { | |
3525 | #if DEBUG | |
3526 | if (debugging) | |
3527 | printk(OSST_DEB_MSG "%s:D: Async write error (write) %x.\n", name, | |
3528 | (STp->buffer)->midlevel_result); | |
3529 | #endif | |
3530 | if ((STp->buffer)->midlevel_result == INT_MAX) | |
3531 | STps->eof = ST_EOM_OK; | |
3532 | else | |
3533 | STps->eof = ST_EOM_ERROR; | |
3534 | } | |
3535 | } | |
3536 | if (STps->eof == ST_EOM_OK) { | |
3537 | retval = (-ENOSPC); | |
3538 | goto out; | |
3539 | } | |
3540 | else if (STps->eof == ST_EOM_ERROR) { | |
3541 | retval = (-EIO); | |
3542 | goto out; | |
3543 | } | |
3544 | ||
3545 | /* Check the buffer readability in cases where copy_user might catch | |
3546 | the problems after some tape movement. */ | |
3547 | if ((copy_from_user(&i, buf, 1) != 0 || | |
3548 | copy_from_user(&i, buf + count - 1, 1) != 0)) { | |
3549 | retval = (-EFAULT); | |
3550 | goto out; | |
3551 | } | |
3552 | ||
3553 | if (!STm->do_buffer_writes) { | |
3554 | write_threshold = 1; | |
3555 | } | |
3556 | else | |
3557 | write_threshold = (STp->buffer)->buffer_blocks * STp->block_size; | |
3558 | if (!STm->do_async_writes) | |
3559 | write_threshold--; | |
3560 | ||
3561 | total = count; | |
3562 | #if DEBUG | |
3563 | if (debugging) | |
3564 | printk(OSST_DEB_MSG "%s:D: Writing %d bytes to file %d block %d lblk %d fseq %d fppos %d\n", | |
5e6575c0 | 3565 | name, (int) count, STps->drv_file, STps->drv_block, |
1da177e4 LT |
3566 | STp->logical_blk_num, STp->frame_seq_number, STp->first_frame_position); |
3567 | #endif | |
3568 | b_point = buf; | |
3569 | while ((STp->buffer)->buffer_bytes + count > write_threshold) | |
3570 | { | |
3571 | doing_write = 1; | |
3572 | do_count = (STp->buffer)->buffer_blocks * STp->block_size - | |
3573 | (STp->buffer)->buffer_bytes; | |
3574 | if (do_count > count) | |
3575 | do_count = count; | |
3576 | ||
3577 | i = append_to_buffer(b_point, STp->buffer, do_count); | |
3578 | if (i) { | |
3579 | retval = i; | |
3580 | goto out; | |
3581 | } | |
3582 | ||
3583 | blks = do_count / STp->block_size; | |
3584 | STp->logical_blk_num += blks; /* logical_blk_num is incremented as data is moved from user */ | |
3585 | ||
3586 | i = osst_write_frame(STp, &SRpnt, 1); | |
3587 | ||
3588 | if (i == (-ENOSPC)) { | |
3589 | transfer = STp->buffer->writing; /* FIXME -- check this logic */ | |
3590 | if (transfer <= do_count) { | |
e1c54b64 | 3591 | *ppos += do_count - transfer; |
1da177e4 LT |
3592 | count -= do_count - transfer; |
3593 | if (STps->drv_block >= 0) { | |
3594 | STps->drv_block += (do_count - transfer) / STp->block_size; | |
3595 | } | |
3596 | STps->eof = ST_EOM_OK; | |
3597 | retval = (-ENOSPC); /* EOM within current request */ | |
3598 | #if DEBUG | |
3599 | if (debugging) | |
3600 | printk(OSST_DEB_MSG "%s:D: EOM with %d bytes unwritten.\n", | |
5e6575c0 | 3601 | name, (int) transfer); |
1da177e4 LT |
3602 | #endif |
3603 | } | |
3604 | else { | |
3605 | STps->eof = ST_EOM_ERROR; | |
3606 | STps->drv_block = (-1); /* Too cautious? */ | |
3607 | retval = (-EIO); /* EOM for old data */ | |
3608 | #if DEBUG | |
3609 | if (debugging) | |
3610 | printk(OSST_DEB_MSG "%s:D: EOM with lost data.\n", name); | |
3611 | #endif | |
3612 | } | |
3613 | } | |
3614 | else | |
3615 | retval = i; | |
3616 | ||
3617 | if (retval < 0) { | |
3618 | if (SRpnt != NULL) { | |
5e6575c0 | 3619 | osst_release_request(SRpnt); |
1da177e4 LT |
3620 | SRpnt = NULL; |
3621 | } | |
3622 | STp->buffer->buffer_bytes = 0; | |
3623 | STp->dirty = 0; | |
3624 | if (count < total) | |
3625 | retval = total - count; | |
3626 | goto out; | |
3627 | } | |
3628 | ||
e1c54b64 | 3629 | *ppos += do_count; |
1da177e4 LT |
3630 | b_point += do_count; |
3631 | count -= do_count; | |
3632 | if (STps->drv_block >= 0) { | |
3633 | STps->drv_block += blks; | |
3634 | } | |
3635 | STp->buffer->buffer_bytes = 0; | |
3636 | STp->dirty = 0; | |
3637 | } /* end while write threshold exceeded */ | |
3638 | ||
3639 | if (count != 0) { | |
3640 | STp->dirty = 1; | |
3641 | i = append_to_buffer(b_point, STp->buffer, count); | |
3642 | if (i) { | |
3643 | retval = i; | |
3644 | goto out; | |
3645 | } | |
3646 | blks = count / STp->block_size; | |
3647 | STp->logical_blk_num += blks; | |
3648 | if (STps->drv_block >= 0) { | |
3649 | STps->drv_block += blks; | |
3650 | } | |
e1c54b64 | 3651 | *ppos += count; |
1da177e4 LT |
3652 | count = 0; |
3653 | } | |
3654 | ||
3655 | if (doing_write && (STp->buffer)->syscall_result != 0) { | |
3656 | retval = (STp->buffer)->syscall_result; | |
3657 | goto out; | |
3658 | } | |
3659 | ||
3660 | if (STm->do_async_writes && ((STp->buffer)->buffer_bytes >= STp->write_threshold)) { | |
3661 | /* Schedule an asynchronous write */ | |
3662 | (STp->buffer)->writing = ((STp->buffer)->buffer_bytes / | |
3663 | STp->block_size) * STp->block_size; | |
3664 | STp->dirty = !((STp->buffer)->writing == | |
3665 | (STp->buffer)->buffer_bytes); | |
3666 | ||
3667 | i = osst_write_frame(STp, &SRpnt, 0); | |
3668 | if (i < 0) { | |
3669 | retval = (-EIO); | |
3670 | goto out; | |
3671 | } | |
3672 | SRpnt = NULL; /* Prevent releasing this request! */ | |
3673 | } | |
3674 | STps->at_sm &= (total == 0); | |
3675 | if (total > 0) | |
3676 | STps->eof = ST_NOEOF; | |
3677 | ||
3678 | retval = total; | |
3679 | ||
3680 | out: | |
5e6575c0 | 3681 | if (SRpnt != NULL) osst_release_request(SRpnt); |
1da177e4 | 3682 | |
4390e601 | 3683 | mutex_unlock(&STp->lock); |
1da177e4 LT |
3684 | |
3685 | return retval; | |
3686 | } | |
3687 | ||
3688 | ||
3689 | /* Read command */ | |
3690 | static ssize_t osst_read(struct file * filp, char __user * buf, size_t count, loff_t *ppos) | |
3691 | { | |
3692 | ssize_t total, retval = 0; | |
3693 | ssize_t i, transfer; | |
3694 | int special; | |
3695 | struct st_modedef * STm; | |
3696 | struct st_partstat * STps; | |
5e6575c0 | 3697 | struct osst_request * SRpnt = NULL; |
1da177e4 LT |
3698 | struct osst_tape * STp = filp->private_data; |
3699 | char * name = tape_name(STp); | |
3700 | ||
3701 | ||
4390e601 | 3702 | if (mutex_lock_interruptible(&STp->lock)) |
1da177e4 LT |
3703 | return (-ERESTARTSYS); |
3704 | ||
3705 | /* | |
3706 | * If we are in the middle of error recovery, don't let anyone | |
3707 | * else try and use this device. Also, if error recovery fails, it | |
3708 | * may try and take the device offline, in which case all further | |
3709 | * access to the device is prohibited. | |
3710 | */ | |
3711 | if( !scsi_block_when_processing_errors(STp->device) ) { | |
3712 | retval = (-ENXIO); | |
3713 | goto out; | |
3714 | } | |
3715 | ||
3716 | if (STp->ready != ST_READY) { | |
3717 | if (STp->ready == ST_NO_TAPE) | |
3718 | retval = (-ENOMEDIUM); | |
3719 | else | |
3720 | retval = (-EIO); | |
3721 | goto out; | |
3722 | } | |
3723 | STm = &(STp->modes[STp->current_mode]); | |
3724 | if (!STm->defined) { | |
3725 | retval = (-ENXIO); | |
3726 | goto out; | |
3727 | } | |
3728 | #if DEBUG | |
3729 | if (!STp->in_use) { | |
3730 | printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); | |
3731 | retval = (-EIO); | |
3732 | goto out; | |
3733 | } | |
3734 | #endif | |
3735 | /* Must have initialized medium */ | |
3736 | if (!STp->header_ok) { | |
3737 | retval = (-EIO); | |
3738 | goto out; | |
3739 | } | |
3740 | ||
3741 | if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1)) | |
3742 | STp->door_locked = ST_LOCKED_AUTO; | |
3743 | ||
3744 | STps = &(STp->ps[STp->partition]); | |
3745 | if (STps->rw == ST_WRITING) { | |
3746 | retval = osst_flush_buffer(STp, &SRpnt, 0); | |
3747 | if (retval) | |
3748 | goto out; | |
3749 | STps->rw = ST_IDLE; | |
3750 | /* FIXME -- this may leave the tape without EOD and up2date headers */ | |
3751 | } | |
3752 | ||
3753 | if ((count % STp->block_size) != 0) { | |
3754 | printk(KERN_WARNING | |
3755 | "%s:W: Read (%Zd bytes) not multiple of tape block size (%d%c).\n", name, count, | |
3756 | STp->block_size<1024?STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k'); | |
3757 | } | |
3758 | ||
3759 | #if DEBUG | |
3760 | if (debugging && STps->eof != ST_NOEOF) | |
3761 | printk(OSST_DEB_MSG "%s:D: EOF/EOM flag up (%d). Bytes %d\n", name, | |
3762 | STps->eof, (STp->buffer)->buffer_bytes); | |
3763 | #endif | |
3764 | if ((STp->buffer)->buffer_bytes == 0 && | |
3765 | STps->eof >= ST_EOD_1) { | |
3766 | if (STps->eof < ST_EOD) { | |
3767 | STps->eof += 1; | |
3768 | retval = 0; | |
3769 | goto out; | |
3770 | } | |
3771 | retval = (-EIO); /* EOM or Blank Check */ | |
3772 | goto out; | |
3773 | } | |
3774 | ||
3775 | /* Check the buffer writability before any tape movement. Don't alter | |
3776 | buffer data. */ | |
3777 | if (copy_from_user(&i, buf, 1) != 0 || | |
3778 | copy_to_user (buf, &i, 1) != 0 || | |
3779 | copy_from_user(&i, buf + count - 1, 1) != 0 || | |
3780 | copy_to_user (buf + count - 1, &i, 1) != 0) { | |
3781 | retval = (-EFAULT); | |
3782 | goto out; | |
3783 | } | |
3784 | ||
3785 | /* Loop until enough data in buffer or a special condition found */ | |
3786 | for (total = 0, special = 0; total < count - STp->block_size + 1 && !special; ) { | |
3787 | ||
3788 | /* Get new data if the buffer is empty */ | |
3789 | if ((STp->buffer)->buffer_bytes == 0) { | |
3790 | if (STps->eof == ST_FM_HIT) | |
3791 | break; | |
3792 | special = osst_get_logical_frame(STp, &SRpnt, STp->frame_seq_number, 0); | |
3793 | if (special < 0) { /* No need to continue read */ | |
3794 | STp->frame_in_buffer = 0; | |
3795 | retval = special; | |
3796 | goto out; | |
3797 | } | |
3798 | } | |
3799 | ||
3800 | /* Move the data from driver buffer to user buffer */ | |
3801 | if ((STp->buffer)->buffer_bytes > 0) { | |
3802 | #if DEBUG | |
3803 | if (debugging && STps->eof != ST_NOEOF) | |
3804 | printk(OSST_DEB_MSG "%s:D: EOF up (%d). Left %d, needed %d.\n", name, | |
5e6575c0 | 3805 | STps->eof, (STp->buffer)->buffer_bytes, (int) (count - total)); |
1da177e4 LT |
3806 | #endif |
3807 | /* force multiple of block size, note block_size may have been adjusted */ | |
3808 | transfer = (((STp->buffer)->buffer_bytes < count - total ? | |
3809 | (STp->buffer)->buffer_bytes : count - total)/ | |
3810 | STp->block_size) * STp->block_size; | |
3811 | ||
3812 | if (transfer == 0) { | |
3813 | printk(KERN_WARNING | |
25985edc | 3814 | "%s:W: Nothing can be transferred, requested %Zd, tape block size (%d%c).\n", |
1da177e4 LT |
3815 | name, count, STp->block_size < 1024? |
3816 | STp->block_size:STp->block_size/1024, | |
3817 | STp->block_size<1024?'b':'k'); | |
3818 | break; | |
3819 | } | |
3820 | i = from_buffer(STp->buffer, buf, transfer); | |
3821 | if (i) { | |
3822 | retval = i; | |
3823 | goto out; | |
3824 | } | |
3825 | STp->logical_blk_num += transfer / STp->block_size; | |
3826 | STps->drv_block += transfer / STp->block_size; | |
e1c54b64 | 3827 | *ppos += transfer; |
1da177e4 LT |
3828 | buf += transfer; |
3829 | total += transfer; | |
3830 | } | |
3831 | ||
3832 | if ((STp->buffer)->buffer_bytes == 0) { | |
3833 | #if DEBUG | |
3834 | if (debugging) | |
3835 | printk(OSST_DEB_MSG "%s:D: Finished with frame %d\n", | |
3836 | name, STp->frame_seq_number); | |
3837 | #endif | |
3838 | STp->frame_in_buffer = 0; | |
3839 | STp->frame_seq_number++; /* frame to look for next time */ | |
3840 | } | |
3841 | } /* for (total = 0, special = 0; total < count && !special; ) */ | |
3842 | ||
3843 | /* Change the eof state if no data from tape or buffer */ | |
3844 | if (total == 0) { | |
3845 | if (STps->eof == ST_FM_HIT) { | |
3846 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD_2:ST_FM; | |
3847 | STps->drv_block = 0; | |
3848 | if (STps->drv_file >= 0) | |
3849 | STps->drv_file++; | |
3850 | } | |
3851 | else if (STps->eof == ST_EOD_1) { | |
3852 | STps->eof = ST_EOD_2; | |
3853 | if (STps->drv_block > 0 && STps->drv_file >= 0) | |
3854 | STps->drv_file++; | |
3855 | STps->drv_block = 0; | |
3856 | } | |
3857 | else if (STps->eof == ST_EOD_2) | |
3858 | STps->eof = ST_EOD; | |
3859 | } | |
3860 | else if (STps->eof == ST_FM) | |
3861 | STps->eof = ST_NOEOF; | |
3862 | ||
3863 | retval = total; | |
3864 | ||
3865 | out: | |
5e6575c0 | 3866 | if (SRpnt != NULL) osst_release_request(SRpnt); |
1da177e4 | 3867 | |
4390e601 | 3868 | mutex_unlock(&STp->lock); |
1da177e4 LT |
3869 | |
3870 | return retval; | |
3871 | } | |
3872 | ||
3873 | ||
3874 | /* Set the driver options */ | |
3875 | static void osst_log_options(struct osst_tape *STp, struct st_modedef *STm, char *name) | |
3876 | { | |
3877 | printk(KERN_INFO | |
3878 | "%s:I: Mode %d options: buffer writes: %d, async writes: %d, read ahead: %d\n", | |
3879 | name, STp->current_mode, STm->do_buffer_writes, STm->do_async_writes, | |
3880 | STm->do_read_ahead); | |
3881 | printk(KERN_INFO | |
3882 | "%s:I: can bsr: %d, two FMs: %d, fast mteom: %d, auto lock: %d,\n", | |
3883 | name, STp->can_bsr, STp->two_fm, STp->fast_mteom, STp->do_auto_lock); | |
3884 | printk(KERN_INFO | |
3885 | "%s:I: defs for wr: %d, no block limits: %d, partitions: %d, s2 log: %d\n", | |
3886 | name, STm->defaults_for_writes, STp->omit_blklims, STp->can_partitions, | |
3887 | STp->scsi2_logical); | |
3888 | printk(KERN_INFO | |
3889 | "%s:I: sysv: %d\n", name, STm->sysv); | |
3890 | #if DEBUG | |
3891 | printk(KERN_INFO | |
3892 | "%s:D: debugging: %d\n", | |
3893 | name, debugging); | |
3894 | #endif | |
3895 | } | |
3896 | ||
3897 | ||
3898 | static int osst_set_options(struct osst_tape *STp, long options) | |
3899 | { | |
3900 | int value; | |
3901 | long code; | |
3902 | struct st_modedef * STm; | |
3903 | char * name = tape_name(STp); | |
3904 | ||
3905 | STm = &(STp->modes[STp->current_mode]); | |
3906 | if (!STm->defined) { | |
3907 | memcpy(STm, &(STp->modes[0]), sizeof(*STm)); | |
3908 | modes_defined = 1; | |
3909 | #if DEBUG | |
3910 | if (debugging) | |
3911 | printk(OSST_DEB_MSG "%s:D: Initialized mode %d definition from mode 0\n", | |
3912 | name, STp->current_mode); | |
3913 | #endif | |
3914 | } | |
3915 | ||
3916 | code = options & MT_ST_OPTIONS; | |
3917 | if (code == MT_ST_BOOLEANS) { | |
3918 | STm->do_buffer_writes = (options & MT_ST_BUFFER_WRITES) != 0; | |
3919 | STm->do_async_writes = (options & MT_ST_ASYNC_WRITES) != 0; | |
3920 | STm->defaults_for_writes = (options & MT_ST_DEF_WRITES) != 0; | |
3921 | STm->do_read_ahead = (options & MT_ST_READ_AHEAD) != 0; | |
3922 | STp->two_fm = (options & MT_ST_TWO_FM) != 0; | |
3923 | STp->fast_mteom = (options & MT_ST_FAST_MTEOM) != 0; | |
3924 | STp->do_auto_lock = (options & MT_ST_AUTO_LOCK) != 0; | |
3925 | STp->can_bsr = (options & MT_ST_CAN_BSR) != 0; | |
3926 | STp->omit_blklims = (options & MT_ST_NO_BLKLIMS) != 0; | |
3927 | if ((STp->device)->scsi_level >= SCSI_2) | |
3928 | STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0; | |
3929 | STp->scsi2_logical = (options & MT_ST_SCSI2LOGICAL) != 0; | |
3930 | STm->sysv = (options & MT_ST_SYSV) != 0; | |
3931 | #if DEBUG | |
3932 | debugging = (options & MT_ST_DEBUGGING) != 0; | |
3933 | #endif | |
3934 | osst_log_options(STp, STm, name); | |
3935 | } | |
3936 | else if (code == MT_ST_SETBOOLEANS || code == MT_ST_CLEARBOOLEANS) { | |
3937 | value = (code == MT_ST_SETBOOLEANS); | |
3938 | if ((options & MT_ST_BUFFER_WRITES) != 0) | |
3939 | STm->do_buffer_writes = value; | |
3940 | if ((options & MT_ST_ASYNC_WRITES) != 0) | |
3941 | STm->do_async_writes = value; | |
3942 | if ((options & MT_ST_DEF_WRITES) != 0) | |
3943 | STm->defaults_for_writes = value; | |
3944 | if ((options & MT_ST_READ_AHEAD) != 0) | |
3945 | STm->do_read_ahead = value; | |
3946 | if ((options & MT_ST_TWO_FM) != 0) | |
3947 | STp->two_fm = value; | |
3948 | if ((options & MT_ST_FAST_MTEOM) != 0) | |
3949 | STp->fast_mteom = value; | |
3950 | if ((options & MT_ST_AUTO_LOCK) != 0) | |
3951 | STp->do_auto_lock = value; | |
3952 | if ((options & MT_ST_CAN_BSR) != 0) | |
3953 | STp->can_bsr = value; | |
3954 | if ((options & MT_ST_NO_BLKLIMS) != 0) | |
3955 | STp->omit_blklims = value; | |
3956 | if ((STp->device)->scsi_level >= SCSI_2 && | |
3957 | (options & MT_ST_CAN_PARTITIONS) != 0) | |
3958 | STp->can_partitions = value; | |
3959 | if ((options & MT_ST_SCSI2LOGICAL) != 0) | |
3960 | STp->scsi2_logical = value; | |
3961 | if ((options & MT_ST_SYSV) != 0) | |
3962 | STm->sysv = value; | |
3963 | #if DEBUG | |
3964 | if ((options & MT_ST_DEBUGGING) != 0) | |
3965 | debugging = value; | |
3966 | #endif | |
3967 | osst_log_options(STp, STm, name); | |
3968 | } | |
3969 | else if (code == MT_ST_WRITE_THRESHOLD) { | |
3970 | value = (options & ~MT_ST_OPTIONS) * ST_KILOBYTE; | |
3971 | if (value < 1 || value > osst_buffer_size) { | |
3972 | printk(KERN_WARNING "%s:W: Write threshold %d too small or too large.\n", | |
3973 | name, value); | |
3974 | return (-EIO); | |
3975 | } | |
3976 | STp->write_threshold = value; | |
3977 | printk(KERN_INFO "%s:I: Write threshold set to %d bytes.\n", | |
3978 | name, value); | |
3979 | } | |
3980 | else if (code == MT_ST_DEF_BLKSIZE) { | |
3981 | value = (options & ~MT_ST_OPTIONS); | |
3982 | if (value == ~MT_ST_OPTIONS) { | |
3983 | STm->default_blksize = (-1); | |
3984 | printk(KERN_INFO "%s:I: Default block size disabled.\n", name); | |
3985 | } | |
3986 | else { | |
3987 | if (value < 512 || value > OS_DATA_SIZE || OS_DATA_SIZE % value) { | |
3988 | printk(KERN_WARNING "%s:W: Default block size cannot be set to %d.\n", | |
3989 | name, value); | |
3990 | return (-EINVAL); | |
3991 | } | |
3992 | STm->default_blksize = value; | |
3993 | printk(KERN_INFO "%s:I: Default block size set to %d bytes.\n", | |
3994 | name, STm->default_blksize); | |
3995 | } | |
3996 | } | |
3997 | else if (code == MT_ST_TIMEOUTS) { | |
3998 | value = (options & ~MT_ST_OPTIONS); | |
3999 | if ((value & MT_ST_SET_LONG_TIMEOUT) != 0) { | |
4000 | STp->long_timeout = (value & ~MT_ST_SET_LONG_TIMEOUT) * HZ; | |
4001 | printk(KERN_INFO "%s:I: Long timeout set to %d seconds.\n", name, | |
4002 | (value & ~MT_ST_SET_LONG_TIMEOUT)); | |
4003 | } | |
4004 | else { | |
4005 | STp->timeout = value * HZ; | |
4006 | printk(KERN_INFO "%s:I: Normal timeout set to %d seconds.\n", name, value); | |
4007 | } | |
4008 | } | |
4009 | else if (code == MT_ST_DEF_OPTIONS) { | |
4010 | code = (options & ~MT_ST_CLEAR_DEFAULT); | |
4011 | value = (options & MT_ST_CLEAR_DEFAULT); | |
4012 | if (code == MT_ST_DEF_DENSITY) { | |
4013 | if (value == MT_ST_CLEAR_DEFAULT) { | |
4014 | STm->default_density = (-1); | |
4015 | printk(KERN_INFO "%s:I: Density default disabled.\n", name); | |
4016 | } | |
4017 | else { | |
4018 | STm->default_density = value & 0xff; | |
4019 | printk(KERN_INFO "%s:I: Density default set to %x\n", | |
4020 | name, STm->default_density); | |
4021 | } | |
4022 | } | |
4023 | else if (code == MT_ST_DEF_DRVBUFFER) { | |
4024 | if (value == MT_ST_CLEAR_DEFAULT) { | |
4025 | STp->default_drvbuffer = 0xff; | |
4026 | printk(KERN_INFO "%s:I: Drive buffer default disabled.\n", name); | |
4027 | } | |
4028 | else { | |
4029 | STp->default_drvbuffer = value & 7; | |
4030 | printk(KERN_INFO "%s:I: Drive buffer default set to %x\n", | |
4031 | name, STp->default_drvbuffer); | |
4032 | } | |
4033 | } | |
4034 | else if (code == MT_ST_DEF_COMPRESSION) { | |
4035 | if (value == MT_ST_CLEAR_DEFAULT) { | |
4036 | STm->default_compression = ST_DONT_TOUCH; | |
4037 | printk(KERN_INFO "%s:I: Compression default disabled.\n", name); | |
4038 | } | |
4039 | else { | |
4040 | STm->default_compression = (value & 1 ? ST_YES : ST_NO); | |
4041 | printk(KERN_INFO "%s:I: Compression default set to %x\n", | |
4042 | name, (value & 1)); | |
4043 | } | |
4044 | } | |
4045 | } | |
4046 | else | |
4047 | return (-EIO); | |
4048 | ||
4049 | return 0; | |
4050 | } | |
4051 | ||
4052 | ||
4053 | /* Internal ioctl function */ | |
5e6575c0 | 4054 | static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt, |
1da177e4 LT |
4055 | unsigned int cmd_in, unsigned long arg) |
4056 | { | |
4057 | int timeout; | |
4058 | long ltmp; | |
4059 | int i, ioctl_result; | |
4060 | int chg_eof = 1; | |
4061 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 4062 | struct osst_request * SRpnt = * aSRpnt; |
1da177e4 LT |
4063 | struct st_partstat * STps; |
4064 | int fileno, blkno, at_sm, frame_seq_numbr, logical_blk_num; | |
4065 | int datalen = 0, direction = DMA_NONE; | |
4066 | char * name = tape_name(STp); | |
4067 | ||
4068 | if (STp->ready != ST_READY && cmd_in != MTLOAD) { | |
4069 | if (STp->ready == ST_NO_TAPE) | |
4070 | return (-ENOMEDIUM); | |
4071 | else | |
4072 | return (-EIO); | |
4073 | } | |
4074 | timeout = STp->long_timeout; | |
4075 | STps = &(STp->ps[STp->partition]); | |
4076 | fileno = STps->drv_file; | |
4077 | blkno = STps->drv_block; | |
4078 | at_sm = STps->at_sm; | |
4079 | frame_seq_numbr = STp->frame_seq_number; | |
4080 | logical_blk_num = STp->logical_blk_num; | |
4081 | ||
4082 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
4083 | switch (cmd_in) { | |
4084 | case MTFSFM: | |
4085 | chg_eof = 0; /* Changed from the FSF after this */ | |
4086 | case MTFSF: | |
4087 | if (STp->raw) | |
4088 | return (-EIO); | |
4089 | if (STp->linux_media) | |
4090 | ioctl_result = osst_space_over_filemarks_forward_fast(STp, &SRpnt, cmd_in, arg); | |
4091 | else | |
4092 | ioctl_result = osst_space_over_filemarks_forward_slow(STp, &SRpnt, cmd_in, arg); | |
4093 | if (fileno >= 0) | |
4094 | fileno += arg; | |
4095 | blkno = 0; | |
4096 | at_sm &= (arg == 0); | |
4097 | goto os_bypass; | |
4098 | ||
4099 | case MTBSF: | |
4100 | chg_eof = 0; /* Changed from the FSF after this */ | |
4101 | case MTBSFM: | |
4102 | if (STp->raw) | |
4103 | return (-EIO); | |
4104 | ioctl_result = osst_space_over_filemarks_backward(STp, &SRpnt, cmd_in, arg); | |
4105 | if (fileno >= 0) | |
4106 | fileno -= arg; | |
4107 | blkno = (-1); /* We can't know the block number */ | |
4108 | at_sm &= (arg == 0); | |
4109 | goto os_bypass; | |
4110 | ||
4111 | case MTFSR: | |
4112 | case MTBSR: | |
4113 | #if DEBUG | |
4114 | if (debugging) | |
4115 | printk(OSST_DEB_MSG "%s:D: Skipping %lu blocks %s from logical block %d\n", | |
4116 | name, arg, cmd_in==MTFSR?"forward":"backward", logical_blk_num); | |
4117 | #endif | |
4118 | if (cmd_in == MTFSR) { | |
4119 | logical_blk_num += arg; | |
4120 | if (blkno >= 0) blkno += arg; | |
4121 | } | |
4122 | else { | |
4123 | logical_blk_num -= arg; | |
4124 | if (blkno >= 0) blkno -= arg; | |
4125 | } | |
4126 | ioctl_result = osst_seek_logical_blk(STp, &SRpnt, logical_blk_num); | |
4127 | fileno = STps->drv_file; | |
4128 | blkno = STps->drv_block; | |
4129 | at_sm &= (arg == 0); | |
4130 | goto os_bypass; | |
4131 | ||
4132 | case MTFSS: | |
4133 | cmd[0] = SPACE; | |
4134 | cmd[1] = 0x04; /* Space Setmarks */ /* FIXME -- OS can't do this? */ | |
4135 | cmd[2] = (arg >> 16); | |
4136 | cmd[3] = (arg >> 8); | |
4137 | cmd[4] = arg; | |
4138 | #if DEBUG | |
4139 | if (debugging) | |
4140 | printk(OSST_DEB_MSG "%s:D: Spacing tape forward %d setmarks.\n", name, | |
4141 | cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); | |
4142 | #endif | |
4143 | if (arg != 0) { | |
4144 | blkno = fileno = (-1); | |
4145 | at_sm = 1; | |
4146 | } | |
4147 | break; | |
4148 | case MTBSS: | |
4149 | cmd[0] = SPACE; | |
4150 | cmd[1] = 0x04; /* Space Setmarks */ /* FIXME -- OS can't do this? */ | |
4151 | ltmp = (-arg); | |
4152 | cmd[2] = (ltmp >> 16); | |
4153 | cmd[3] = (ltmp >> 8); | |
4154 | cmd[4] = ltmp; | |
4155 | #if DEBUG | |
4156 | if (debugging) { | |
4157 | if (cmd[2] & 0x80) | |
4158 | ltmp = 0xff000000; | |
4159 | ltmp = ltmp | (cmd[2] << 16) | (cmd[3] << 8) | cmd[4]; | |
4160 | printk(OSST_DEB_MSG "%s:D: Spacing tape backward %ld setmarks.\n", | |
4161 | name, (-ltmp)); | |
4162 | } | |
4163 | #endif | |
4164 | if (arg != 0) { | |
4165 | blkno = fileno = (-1); | |
4166 | at_sm = 1; | |
4167 | } | |
4168 | break; | |
4169 | case MTWEOF: | |
4170 | if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) { | |
4171 | STp->write_type = OS_WRITE_DATA; | |
4172 | ioctl_result = osst_flush_write_buffer(STp, &SRpnt); | |
4173 | } else | |
4174 | ioctl_result = 0; | |
4175 | #if DEBUG | |
4176 | if (debugging) | |
4177 | printk(OSST_DEB_MSG "%s:D: Writing %ld filemark(s).\n", name, arg); | |
4178 | #endif | |
4179 | for (i=0; i<arg; i++) | |
4180 | ioctl_result |= osst_write_filemark(STp, &SRpnt); | |
4181 | if (fileno >= 0) fileno += arg; | |
4182 | if (blkno >= 0) blkno = 0; | |
4183 | goto os_bypass; | |
4184 | ||
4185 | case MTWSM: | |
4186 | if (STp->write_prot) | |
4187 | return (-EACCES); | |
4188 | if (!STp->raw) | |
4189 | return 0; | |
4190 | cmd[0] = WRITE_FILEMARKS; /* FIXME -- need OS version */ | |
4191 | if (cmd_in == MTWSM) | |
4192 | cmd[1] = 2; | |
4193 | cmd[2] = (arg >> 16); | |
4194 | cmd[3] = (arg >> 8); | |
4195 | cmd[4] = arg; | |
4196 | timeout = STp->timeout; | |
4197 | #if DEBUG | |
4198 | if (debugging) | |
4199 | printk(OSST_DEB_MSG "%s:D: Writing %d setmark(s).\n", name, | |
4200 | cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); | |
4201 | #endif | |
4202 | if (fileno >= 0) | |
4203 | fileno += arg; | |
4204 | blkno = 0; | |
4205 | at_sm = (cmd_in == MTWSM); | |
4206 | break; | |
4207 | case MTOFFL: | |
4208 | case MTLOAD: | |
4209 | case MTUNLOAD: | |
4210 | case MTRETEN: | |
4211 | cmd[0] = START_STOP; | |
4212 | cmd[1] = 1; /* Don't wait for completion */ | |
4213 | if (cmd_in == MTLOAD) { | |
4214 | if (STp->ready == ST_NO_TAPE) | |
4215 | cmd[4] = 4; /* open tray */ | |
4216 | else | |
4217 | cmd[4] = 1; /* load */ | |
4218 | } | |
4219 | if (cmd_in == MTRETEN) | |
4220 | cmd[4] = 3; /* retension then mount */ | |
4221 | if (cmd_in == MTOFFL) | |
4222 | cmd[4] = 4; /* rewind then eject */ | |
4223 | timeout = STp->timeout; | |
4224 | #if DEBUG | |
4225 | if (debugging) { | |
4226 | switch (cmd_in) { | |
4227 | case MTUNLOAD: | |
4228 | printk(OSST_DEB_MSG "%s:D: Unloading tape.\n", name); | |
4229 | break; | |
4230 | case MTLOAD: | |
4231 | printk(OSST_DEB_MSG "%s:D: Loading tape.\n", name); | |
4232 | break; | |
4233 | case MTRETEN: | |
4234 | printk(OSST_DEB_MSG "%s:D: Retensioning tape.\n", name); | |
4235 | break; | |
4236 | case MTOFFL: | |
4237 | printk(OSST_DEB_MSG "%s:D: Ejecting tape.\n", name); | |
4238 | break; | |
4239 | } | |
4240 | } | |
4241 | #endif | |
4242 | fileno = blkno = at_sm = frame_seq_numbr = logical_blk_num = 0 ; | |
4243 | break; | |
4244 | case MTNOP: | |
4245 | #if DEBUG | |
4246 | if (debugging) | |
4247 | printk(OSST_DEB_MSG "%s:D: No-op on tape.\n", name); | |
4248 | #endif | |
4249 | return 0; /* Should do something ? */ | |
4250 | break; | |
4251 | case MTEOM: | |
4252 | #if DEBUG | |
4253 | if (debugging) | |
4254 | printk(OSST_DEB_MSG "%s:D: Spacing to end of recorded medium.\n", name); | |
4255 | #endif | |
4256 | if ((osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) || | |
4257 | (osst_get_logical_frame(STp, &SRpnt, -1, 0) < 0)) { | |
4258 | ioctl_result = -EIO; | |
4259 | goto os_bypass; | |
4260 | } | |
4261 | if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_EOD) { | |
4262 | #if DEBUG | |
4263 | printk(OSST_DEB_MSG "%s:D: No EOD frame found where expected.\n", name); | |
4264 | #endif | |
4265 | ioctl_result = -EIO; | |
4266 | goto os_bypass; | |
4267 | } | |
4268 | ioctl_result = osst_set_frame_position(STp, &SRpnt, STp->eod_frame_ppos, 0); | |
4269 | fileno = STp->filemark_cnt; | |
4270 | blkno = at_sm = 0; | |
4271 | goto os_bypass; | |
4272 | ||
4273 | case MTERASE: | |
4274 | if (STp->write_prot) | |
4275 | return (-EACCES); | |
4276 | ioctl_result = osst_reset_header(STp, &SRpnt); | |
4277 | i = osst_write_eod(STp, &SRpnt); | |
4278 | if (i < ioctl_result) ioctl_result = i; | |
4279 | i = osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos); | |
4280 | if (i < ioctl_result) ioctl_result = i; | |
4281 | fileno = blkno = at_sm = 0 ; | |
4282 | goto os_bypass; | |
4283 | ||
4284 | case MTREW: | |
4285 | cmd[0] = REZERO_UNIT; /* rewind */ | |
4286 | cmd[1] = 1; | |
4287 | #if DEBUG | |
4288 | if (debugging) | |
4289 | printk(OSST_DEB_MSG "%s:D: Rewinding tape, Immed=%d.\n", name, cmd[1]); | |
4290 | #endif | |
4291 | fileno = blkno = at_sm = frame_seq_numbr = logical_blk_num = 0 ; | |
4292 | break; | |
4293 | ||
4294 | case MTSETBLK: /* Set block length */ | |
4295 | if ((STps->drv_block == 0 ) && | |
4296 | !STp->dirty && | |
4297 | ((STp->buffer)->buffer_bytes == 0) && | |
4298 | ((arg & MT_ST_BLKSIZE_MASK) >= 512 ) && | |
4299 | ((arg & MT_ST_BLKSIZE_MASK) <= OS_DATA_SIZE) && | |
4300 | !(OS_DATA_SIZE % (arg & MT_ST_BLKSIZE_MASK)) ) { | |
4301 | /* | |
4302 | * Only allowed to change the block size if you opened the | |
4303 | * device at the beginning of a file before writing anything. | |
4304 | * Note, that when reading, changing block_size is futile, | |
4305 | * as the size used when writing overrides it. | |
4306 | */ | |
4307 | STp->block_size = (arg & MT_ST_BLKSIZE_MASK); | |
4308 | printk(KERN_INFO "%s:I: Block size set to %d bytes.\n", | |
4309 | name, STp->block_size); | |
4310 | return 0; | |
4311 | } | |
4312 | case MTSETDENSITY: /* Set tape density */ | |
4313 | case MTSETDRVBUFFER: /* Set drive buffering */ | |
4314 | case SET_DENS_AND_BLK: /* Set density and block size */ | |
4315 | chg_eof = 0; | |
4316 | if (STp->dirty || (STp->buffer)->buffer_bytes != 0) | |
4317 | return (-EIO); /* Not allowed if data in buffer */ | |
4318 | if ((cmd_in == MTSETBLK || cmd_in == SET_DENS_AND_BLK) && | |
4319 | (arg & MT_ST_BLKSIZE_MASK) != 0 && | |
4320 | (arg & MT_ST_BLKSIZE_MASK) != STp->block_size ) { | |
4321 | printk(KERN_WARNING "%s:W: Illegal to set block size to %d%s.\n", | |
4322 | name, (int)(arg & MT_ST_BLKSIZE_MASK), | |
4323 | (OS_DATA_SIZE % (arg & MT_ST_BLKSIZE_MASK))?"":" now"); | |
4324 | return (-EINVAL); | |
4325 | } | |
4326 | return 0; /* FIXME silently ignore if block size didn't change */ | |
4327 | ||
4328 | default: | |
4329 | return (-ENOSYS); | |
4330 | } | |
4331 | ||
4332 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, datalen, direction, timeout, MAX_RETRIES, 1); | |
4333 | ||
4334 | ioctl_result = (STp->buffer)->syscall_result; | |
4335 | ||
4336 | if (!SRpnt) { | |
4337 | #if DEBUG | |
4338 | printk(OSST_DEB_MSG "%s:D: Couldn't exec scsi cmd for IOCTL\n", name); | |
4339 | #endif | |
4340 | return ioctl_result; | |
4341 | } | |
4342 | ||
4343 | if (!ioctl_result) { /* SCSI command successful */ | |
4344 | STp->frame_seq_number = frame_seq_numbr; | |
4345 | STp->logical_blk_num = logical_blk_num; | |
4346 | } | |
4347 | ||
4348 | os_bypass: | |
4349 | #if DEBUG | |
4350 | if (debugging) | |
4351 | printk(OSST_DEB_MSG "%s:D: IOCTL (%d) Result=%d\n", name, cmd_in, ioctl_result); | |
4352 | #endif | |
4353 | ||
4354 | if (!ioctl_result) { /* success */ | |
4355 | ||
4356 | if (cmd_in == MTFSFM) { | |
4357 | fileno--; | |
4358 | blkno--; | |
4359 | } | |
4360 | if (cmd_in == MTBSFM) { | |
4361 | fileno++; | |
4362 | blkno++; | |
4363 | } | |
4364 | STps->drv_block = blkno; | |
4365 | STps->drv_file = fileno; | |
4366 | STps->at_sm = at_sm; | |
4367 | ||
4368 | if (cmd_in == MTEOM) | |
4369 | STps->eof = ST_EOD; | |
4370 | else if ((cmd_in == MTFSFM || cmd_in == MTBSF) && STps->eof == ST_FM_HIT) { | |
4371 | ioctl_result = osst_seek_logical_blk(STp, &SRpnt, STp->logical_blk_num-1); | |
4372 | STps->drv_block++; | |
4373 | STp->logical_blk_num++; | |
4374 | STp->frame_seq_number++; | |
4375 | STp->frame_in_buffer = 0; | |
4376 | STp->buffer->read_pointer = 0; | |
4377 | } | |
4378 | else if (cmd_in == MTFSF) | |
4379 | STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_FM; | |
4380 | else if (chg_eof) | |
4381 | STps->eof = ST_NOEOF; | |
4382 | ||
4383 | if (cmd_in == MTOFFL || cmd_in == MTUNLOAD) | |
4384 | STp->rew_at_close = 0; | |
4385 | else if (cmd_in == MTLOAD) { | |
4386 | for (i=0; i < ST_NBR_PARTITIONS; i++) { | |
4387 | STp->ps[i].rw = ST_IDLE; | |
4388 | STp->ps[i].last_block_valid = 0;/* FIXME - where else is this field maintained? */ | |
4389 | } | |
4390 | STp->partition = 0; | |
4391 | } | |
4392 | ||
4393 | if (cmd_in == MTREW) { | |
4394 | ioctl_result = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos); | |
4395 | if (ioctl_result > 0) | |
4396 | ioctl_result = 0; | |
4397 | } | |
4398 | ||
4399 | } else if (cmd_in == MTBSF || cmd_in == MTBSFM ) { | |
4400 | if (osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos) < 0) | |
4401 | STps->drv_file = STps->drv_block = -1; | |
4402 | else | |
4403 | STps->drv_file = STps->drv_block = 0; | |
4404 | STps->eof = ST_NOEOF; | |
4405 | } else if (cmd_in == MTFSF || cmd_in == MTFSFM) { | |
4406 | if (osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) | |
4407 | STps->drv_file = STps->drv_block = -1; | |
4408 | else { | |
4409 | STps->drv_file = STp->filemark_cnt; | |
4410 | STps->drv_block = 0; | |
4411 | } | |
4412 | STps->eof = ST_EOD; | |
4413 | } else if (cmd_in == MTBSR || cmd_in == MTFSR || cmd_in == MTWEOF || cmd_in == MTEOM) { | |
4414 | STps->drv_file = STps->drv_block = (-1); | |
4415 | STps->eof = ST_NOEOF; | |
4416 | STp->header_ok = 0; | |
4417 | } else if (cmd_in == MTERASE) { | |
4418 | STp->header_ok = 0; | |
4419 | } else if (SRpnt) { /* SCSI command was not completely successful. */ | |
5e6575c0 | 4420 | if (SRpnt->sense[2] & 0x40) { |
1da177e4 LT |
4421 | STps->eof = ST_EOM_OK; |
4422 | STps->drv_block = 0; | |
4423 | } | |
4424 | if (chg_eof) | |
4425 | STps->eof = ST_NOEOF; | |
4426 | ||
5e6575c0 | 4427 | if ((SRpnt->sense[2] & 0x0f) == BLANK_CHECK) |
1da177e4 LT |
4428 | STps->eof = ST_EOD; |
4429 | ||
4430 | if (cmd_in == MTLOAD && osst_wait_for_medium(STp, &SRpnt, 60)) | |
4431 | ioctl_result = osst_wait_ready(STp, &SRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE); | |
4432 | } | |
4433 | *aSRpnt = SRpnt; | |
4434 | ||
4435 | return ioctl_result; | |
4436 | } | |
4437 | ||
4438 | ||
4439 | /* Open the device */ | |
647d87bd | 4440 | static int __os_scsi_tape_open(struct inode * inode, struct file * filp) |
1da177e4 LT |
4441 | { |
4442 | unsigned short flags; | |
4443 | int i, b_size, new_session = 0, retval = 0; | |
4444 | unsigned char cmd[MAX_COMMAND_SIZE]; | |
5e6575c0 | 4445 | struct osst_request * SRpnt = NULL; |
1da177e4 LT |
4446 | struct osst_tape * STp; |
4447 | struct st_modedef * STm; | |
4448 | struct st_partstat * STps; | |
4449 | char * name; | |
4450 | int dev = TAPE_NR(inode); | |
4451 | int mode = TAPE_MODE(inode); | |
4452 | ||
4453 | /* | |
4454 | * We really want to do nonseekable_open(inode, filp); here, but some | |
4455 | * versions of tar incorrectly call lseek on tapes and bail out if that | |
4456 | * fails. So we disallow pread() and pwrite(), but permit lseeks. | |
4457 | */ | |
4458 | filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE); | |
4459 | ||
4460 | write_lock(&os_scsi_tapes_lock); | |
4461 | if (dev >= osst_max_dev || os_scsi_tapes == NULL || | |
4462 | (STp = os_scsi_tapes[dev]) == NULL || !STp->device) { | |
4463 | write_unlock(&os_scsi_tapes_lock); | |
4464 | return (-ENXIO); | |
4465 | } | |
4466 | ||
4467 | name = tape_name(STp); | |
4468 | ||
4469 | if (STp->in_use) { | |
4470 | write_unlock(&os_scsi_tapes_lock); | |
4471 | #if DEBUG | |
4472 | printk(OSST_DEB_MSG "%s:D: Device already in use.\n", name); | |
4473 | #endif | |
4474 | return (-EBUSY); | |
4475 | } | |
4476 | if (scsi_device_get(STp->device)) { | |
4477 | write_unlock(&os_scsi_tapes_lock); | |
4478 | #if DEBUG | |
4479 | printk(OSST_DEB_MSG "%s:D: Failed scsi_device_get.\n", name); | |
4480 | #endif | |
4481 | return (-ENXIO); | |
4482 | } | |
4483 | filp->private_data = STp; | |
4484 | STp->in_use = 1; | |
4485 | write_unlock(&os_scsi_tapes_lock); | |
4486 | STp->rew_at_close = TAPE_REWIND(inode); | |
4487 | ||
4488 | if( !scsi_block_when_processing_errors(STp->device) ) { | |
4489 | return -ENXIO; | |
4490 | } | |
4491 | ||
4492 | if (mode != STp->current_mode) { | |
4493 | #if DEBUG | |
4494 | if (debugging) | |
4495 | printk(OSST_DEB_MSG "%s:D: Mode change from %d to %d.\n", | |
4496 | name, STp->current_mode, mode); | |
4497 | #endif | |
4498 | new_session = 1; | |
4499 | STp->current_mode = mode; | |
4500 | } | |
4501 | STm = &(STp->modes[STp->current_mode]); | |
4502 | ||
4503 | flags = filp->f_flags; | |
4504 | STp->write_prot = ((flags & O_ACCMODE) == O_RDONLY); | |
4505 | ||
4506 | STp->raw = TAPE_IS_RAW(inode); | |
4507 | if (STp->raw) | |
4508 | STp->header_ok = 0; | |
4509 | ||
4510 | /* Allocate data segments for this device's tape buffer */ | |
4511 | if (!enlarge_buffer(STp->buffer, STp->restr_dma)) { | |
4512 | printk(KERN_ERR "%s:E: Unable to allocate memory segments for tape buffer.\n", name); | |
4513 | retval = (-EOVERFLOW); | |
4514 | goto err_out; | |
4515 | } | |
4516 | if (STp->buffer->buffer_size >= OS_FRAME_SIZE) { | |
4517 | for (i = 0, b_size = 0; | |
4518 | (i < STp->buffer->sg_segs) && ((b_size + STp->buffer->sg[i].length) <= OS_DATA_SIZE); | |
4519 | b_size += STp->buffer->sg[i++].length); | |
45711f1a | 4520 | STp->buffer->aux = (os_aux_t *) (page_address(sg_page(&STp->buffer->sg[i])) + OS_DATA_SIZE - b_size); |
1da177e4 LT |
4521 | #if DEBUG |
4522 | printk(OSST_DEB_MSG "%s:D: b_data points to %p in segment 0 at %p\n", name, | |
4523 | STp->buffer->b_data, page_address(STp->buffer->sg[0].page)); | |
4524 | printk(OSST_DEB_MSG "%s:D: AUX points to %p in segment %d at %p\n", name, | |
4525 | STp->buffer->aux, i, page_address(STp->buffer->sg[i].page)); | |
4526 | #endif | |
4527 | } else { | |
4528 | STp->buffer->aux = NULL; /* this had better never happen! */ | |
4529 | printk(KERN_NOTICE "%s:A: Framesize %d too large for buffer.\n", name, OS_FRAME_SIZE); | |
4530 | retval = (-EIO); | |
4531 | goto err_out; | |
4532 | } | |
4533 | STp->buffer->writing = 0; | |
4534 | STp->buffer->syscall_result = 0; | |
4535 | STp->dirty = 0; | |
4536 | for (i=0; i < ST_NBR_PARTITIONS; i++) { | |
4537 | STps = &(STp->ps[i]); | |
4538 | STps->rw = ST_IDLE; | |
4539 | } | |
4540 | STp->ready = ST_READY; | |
4541 | #if DEBUG | |
4542 | STp->nbr_waits = STp->nbr_finished = 0; | |
4543 | #endif | |
4544 | ||
4545 | memset (cmd, 0, MAX_COMMAND_SIZE); | |
4546 | cmd[0] = TEST_UNIT_READY; | |
4547 | ||
4548 | SRpnt = osst_do_scsi(NULL, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); | |
4549 | if (!SRpnt) { | |
4550 | retval = (STp->buffer)->syscall_result; /* FIXME - valid? */ | |
4551 | goto err_out; | |
4552 | } | |
5e6575c0 WR |
4553 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
4554 | (SRpnt->sense[2] & 0x0f) == NOT_READY && | |
4555 | SRpnt->sense[12] == 4 ) { | |
1da177e4 | 4556 | #if DEBUG |
5e6575c0 | 4557 | printk(OSST_DEB_MSG "%s:D: Unit not ready, cause %x\n", name, SRpnt->sense[13]); |
1da177e4 LT |
4558 | #endif |
4559 | if (filp->f_flags & O_NONBLOCK) { | |
4560 | retval = -EAGAIN; | |
4561 | goto err_out; | |
4562 | } | |
5e6575c0 | 4563 | if (SRpnt->sense[13] == 2) { /* initialize command required (LOAD) */ |
1da177e4 LT |
4564 | memset (cmd, 0, MAX_COMMAND_SIZE); |
4565 | cmd[0] = START_STOP; | |
4566 | cmd[1] = 1; | |
4567 | cmd[4] = 1; | |
4568 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, | |
4569 | STp->timeout, MAX_RETRIES, 1); | |
4570 | } | |
5e6575c0 | 4571 | osst_wait_ready(STp, &SRpnt, (SRpnt->sense[13]==1?15:3) * 60, 0); |
1da177e4 | 4572 | } |
5e6575c0 WR |
4573 | if ((SRpnt->sense[0] & 0x70) == 0x70 && |
4574 | (SRpnt->sense[2] & 0x0f) == UNIT_ATTENTION) { /* New media? */ | |
1da177e4 LT |
4575 | #if DEBUG |
4576 | printk(OSST_DEB_MSG "%s:D: Unit wants attention\n", name); | |
4577 | #endif | |
4578 | STp->header_ok = 0; | |
4579 | ||
4580 | for (i=0; i < 10; i++) { | |
4581 | ||
4582 | memset (cmd, 0, MAX_COMMAND_SIZE); | |
4583 | cmd[0] = TEST_UNIT_READY; | |
4584 | ||
4585 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, | |
4586 | STp->timeout, MAX_RETRIES, 1); | |
5e6575c0 WR |
4587 | if ((SRpnt->sense[0] & 0x70) != 0x70 || |
4588 | (SRpnt->sense[2] & 0x0f) != UNIT_ATTENTION) | |
1da177e4 LT |
4589 | break; |
4590 | } | |
4591 | ||
4592 | STp->pos_unknown = 0; | |
4593 | STp->partition = STp->new_partition = 0; | |
4594 | if (STp->can_partitions) | |
4595 | STp->nbr_partitions = 1; /* This guess will be updated later if necessary */ | |
4596 | for (i=0; i < ST_NBR_PARTITIONS; i++) { | |
4597 | STps = &(STp->ps[i]); | |
4598 | STps->rw = ST_IDLE; /* FIXME - seems to be redundant... */ | |
4599 | STps->eof = ST_NOEOF; | |
4600 | STps->at_sm = 0; | |
4601 | STps->last_block_valid = 0; | |
4602 | STps->drv_block = 0; | |
4603 | STps->drv_file = 0 ; | |
4604 | } | |
4605 | new_session = 1; | |
4606 | STp->recover_count = 0; | |
4607 | STp->abort_count = 0; | |
4608 | } | |
4609 | /* | |
4610 | * if we have valid headers from before, and the drive/tape seem untouched, | |
4611 | * open without reconfiguring and re-reading the headers | |
4612 | */ | |
4613 | if (!STp->buffer->syscall_result && STp->header_ok && | |
5e6575c0 | 4614 | !SRpnt->result && SRpnt->sense[0] == 0) { |
1da177e4 LT |
4615 | |
4616 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
4617 | cmd[0] = MODE_SENSE; | |
4618 | cmd[1] = 8; | |
4619 | cmd[2] = VENDOR_IDENT_PAGE; | |
4620 | cmd[4] = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH; | |
4621 | ||
4622 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1); | |
4623 | ||
4624 | if (STp->buffer->syscall_result || | |
4625 | STp->buffer->b_data[MODE_HEADER_LENGTH + 2] != 'L' || | |
4626 | STp->buffer->b_data[MODE_HEADER_LENGTH + 3] != 'I' || | |
4627 | STp->buffer->b_data[MODE_HEADER_LENGTH + 4] != 'N' || | |
4628 | STp->buffer->b_data[MODE_HEADER_LENGTH + 5] != '4' ) { | |
4629 | #if DEBUG | |
4630 | printk(OSST_DEB_MSG "%s:D: Signature was changed to %c%c%c%c\n", name, | |
4631 | STp->buffer->b_data[MODE_HEADER_LENGTH + 2], | |
4632 | STp->buffer->b_data[MODE_HEADER_LENGTH + 3], | |
4633 | STp->buffer->b_data[MODE_HEADER_LENGTH + 4], | |
4634 | STp->buffer->b_data[MODE_HEADER_LENGTH + 5]); | |
4635 | #endif | |
4636 | STp->header_ok = 0; | |
4637 | } | |
4638 | i = STp->first_frame_position; | |
4639 | if (STp->header_ok && i == osst_get_frame_position(STp, &SRpnt)) { | |
4640 | if (STp->door_locked == ST_UNLOCKED) { | |
4641 | if (do_door_lock(STp, 1)) | |
4642 | printk(KERN_INFO "%s:I: Can't lock drive door\n", name); | |
4643 | else | |
4644 | STp->door_locked = ST_LOCKED_AUTO; | |
4645 | } | |
4646 | if (!STp->frame_in_buffer) { | |
4647 | STp->block_size = (STm->default_blksize > 0) ? | |
4648 | STm->default_blksize : OS_DATA_SIZE; | |
4649 | STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0; | |
4650 | } | |
4651 | STp->buffer->buffer_blocks = OS_DATA_SIZE / STp->block_size; | |
4652 | STp->fast_open = 1; | |
5e6575c0 | 4653 | osst_release_request(SRpnt); |
1da177e4 LT |
4654 | return 0; |
4655 | } | |
4656 | #if DEBUG | |
4657 | if (i != STp->first_frame_position) | |
4658 | printk(OSST_DEB_MSG "%s:D: Tape position changed from %d to %d\n", | |
4659 | name, i, STp->first_frame_position); | |
4660 | #endif | |
4661 | STp->header_ok = 0; | |
4662 | } | |
4663 | STp->fast_open = 0; | |
4664 | ||
4665 | if ((STp->buffer)->syscall_result != 0 && /* in all error conditions except no medium */ | |
5e6575c0 | 4666 | (SRpnt->sense[2] != 2 || SRpnt->sense[12] != 0x3A) ) { |
1da177e4 LT |
4667 | |
4668 | memset(cmd, 0, MAX_COMMAND_SIZE); | |
4669 | cmd[0] = MODE_SELECT; | |
4670 | cmd[1] = 0x10; | |
4671 | cmd[4] = 4 + MODE_HEADER_LENGTH; | |
4672 | ||
4673 | (STp->buffer)->b_data[0] = cmd[4] - 1; | |
4674 | (STp->buffer)->b_data[1] = 0; /* Medium Type - ignoring */ | |
4675 | (STp->buffer)->b_data[2] = 0; /* Reserved */ | |
4676 | (STp->buffer)->b_data[3] = 0; /* Block Descriptor Length */ | |
4677 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = 0x3f; | |
4678 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 1; | |
4679 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 2; | |
4680 | (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 3; | |
4681 | ||
4682 | #if DEBUG | |
4683 | printk(OSST_DEB_MSG "%s:D: Applying soft reset\n", name); | |
4684 | #endif | |
4685 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); | |
4686 | ||
4687 | STp->header_ok = 0; | |
4688 | ||
4689 | for (i=0; i < 10; i++) { | |
4690 | ||
4691 | memset (cmd, 0, MAX_COMMAND_SIZE); | |
4692 | cmd[0] = TEST_UNIT_READY; | |
4693 | ||
4694 | SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, | |
4695 | STp->timeout, MAX_RETRIES, 1); | |
5e6575c0 WR |
4696 | if ((SRpnt->sense[0] & 0x70) != 0x70 || |
4697 | (SRpnt->sense[2] & 0x0f) == NOT_READY) | |
1da177e4 LT |
4698 | break; |
4699 | ||
5e6575c0 | 4700 | if ((SRpnt->sense[2] & 0x0f) == UNIT_ATTENTION) { |
6e2037b0 AM |
4701 | int j; |
4702 | ||
1da177e4 LT |
4703 | STp->pos_unknown = 0; |
4704 | STp->partition = STp->new_partition = 0; | |
4705 | if (STp->can_partitions) | |
4706 | STp->nbr_partitions = 1; /* This guess will be updated later if necessary */ | |
a061f57d RK |
4707 | for (j = 0; j < ST_NBR_PARTITIONS; j++) { |
4708 | STps = &(STp->ps[j]); | |
1da177e4 LT |
4709 | STps->rw = ST_IDLE; |
4710 | STps->eof = ST_NOEOF; | |
4711 | STps->at_sm = 0; | |
4712 | STps->last_block_valid = 0; | |
4713 | STps->drv_block = 0; | |
4714 | STps->drv_file = 0 ; | |
4715 | } | |
4716 | new_session = 1; | |
4717 | } | |
4718 | } | |
4719 | } | |
4720 | ||
4721 | if (osst_wait_ready(STp, &SRpnt, 15 * 60, 0)) /* FIXME - not allowed with NOBLOCK */ | |
4722 | printk(KERN_INFO "%s:I: Device did not become Ready in open\n", name); | |
4723 | ||
4724 | if ((STp->buffer)->syscall_result != 0) { | |
4725 | if ((STp->device)->scsi_level >= SCSI_2 && | |
5e6575c0 WR |
4726 | (SRpnt->sense[0] & 0x70) == 0x70 && |
4727 | (SRpnt->sense[2] & 0x0f) == NOT_READY && | |
4728 | SRpnt->sense[12] == 0x3a) { /* Check ASC */ | |
1da177e4 LT |
4729 | STp->ready = ST_NO_TAPE; |
4730 | } else | |
4731 | STp->ready = ST_NOT_READY; | |
5e6575c0 | 4732 | osst_release_request(SRpnt); |
1da177e4 LT |
4733 | SRpnt = NULL; |
4734 | STp->density = 0; /* Clear the erroneous "residue" */ | |
4735 | STp->write_prot = 0; | |
4736 | STp->block_size = 0; | |
4737 | STp->ps[0].drv_file = STp->ps[0].drv_block = (-1); | |
4738 | STp->partition = STp->new_partition = 0; | |
4739 | STp->door_locked = ST_UNLOCKED; | |
4740 | return 0; | |
4741 | } | |
4742 | ||
4743 | osst_configure_onstream(STp, &SRpnt); | |
4744 | ||
4745 | STp->block_size = STp->raw ? OS_FRAME_SIZE : ( | |
4746 | (STm->default_blksize > 0) ? STm->default_blksize : OS_DATA_SIZE); | |
4747 | STp->buffer->buffer_blocks = STp->raw ? 1 : OS_DATA_SIZE / STp->block_size; | |
4748 | STp->buffer->buffer_bytes = | |
4749 | STp->buffer->read_pointer = | |
4750 | STp->frame_in_buffer = 0; | |
4751 | ||
4752 | #if DEBUG | |
4753 | if (debugging) | |
4754 | printk(OSST_DEB_MSG "%s:D: Block size: %d, frame size: %d, buffer size: %d (%d blocks).\n", | |
4755 | name, STp->block_size, OS_FRAME_SIZE, (STp->buffer)->buffer_size, | |
4756 | (STp->buffer)->buffer_blocks); | |
4757 | #endif | |
4758 | ||
4759 | if (STp->drv_write_prot) { | |
4760 | STp->write_prot = 1; | |
4761 | #if DEBUG | |
4762 | if (debugging) | |
4763 | printk(OSST_DEB_MSG "%s:D: Write protected\n", name); | |
4764 | #endif | |
4765 | if ((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR) { | |
4766 | retval = (-EROFS); | |
4767 | goto err_out; | |
4768 | } | |
4769 | } | |
4770 | ||
4771 | if (new_session) { /* Change the drive parameters for the new mode */ | |
4772 | #if DEBUG | |
4773 | if (debugging) | |
4774 | printk(OSST_DEB_MSG "%s:D: New Session\n", name); | |
4775 | #endif | |
4776 | STp->density_changed = STp->blksize_changed = 0; | |
4777 | STp->compression_changed = 0; | |
4778 | } | |
4779 | ||
4780 | /* | |
4781 | * properly position the tape and check the ADR headers | |
4782 | */ | |
4783 | if (STp->door_locked == ST_UNLOCKED) { | |
4784 | if (do_door_lock(STp, 1)) | |
4785 | printk(KERN_INFO "%s:I: Can't lock drive door\n", name); | |
4786 | else | |
4787 | STp->door_locked = ST_LOCKED_AUTO; | |
4788 | } | |
4789 | ||
4790 | osst_analyze_headers(STp, &SRpnt); | |
4791 | ||
5e6575c0 | 4792 | osst_release_request(SRpnt); |
1da177e4 LT |
4793 | SRpnt = NULL; |
4794 | ||
4795 | return 0; | |
4796 | ||
4797 | err_out: | |
4798 | if (SRpnt != NULL) | |
5e6575c0 | 4799 | osst_release_request(SRpnt); |
1da177e4 LT |
4800 | normalize_buffer(STp->buffer); |
4801 | STp->header_ok = 0; | |
4802 | STp->in_use = 0; | |
4803 | scsi_device_put(STp->device); | |
4804 | ||
4805 | return retval; | |
4806 | } | |
4807 | ||
647d87bd JC |
4808 | /* BKL pushdown: spaghetti avoidance wrapper */ |
4809 | static int os_scsi_tape_open(struct inode * inode, struct file * filp) | |
4810 | { | |
4811 | int ret; | |
4812 | ||
c45d15d2 | 4813 | mutex_lock(&osst_int_mutex); |
647d87bd | 4814 | ret = __os_scsi_tape_open(inode, filp); |
c45d15d2 | 4815 | mutex_unlock(&osst_int_mutex); |
647d87bd JC |
4816 | return ret; |
4817 | } | |
4818 | ||
4819 | ||
1da177e4 LT |
4820 | |
4821 | /* Flush the tape buffer before close */ | |
75e1fcc0 | 4822 | static int os_scsi_tape_flush(struct file * filp, fl_owner_t id) |
1da177e4 LT |
4823 | { |
4824 | int result = 0, result2; | |
4825 | struct osst_tape * STp = filp->private_data; | |
4826 | struct st_modedef * STm = &(STp->modes[STp->current_mode]); | |
4827 | struct st_partstat * STps = &(STp->ps[STp->partition]); | |
5e6575c0 | 4828 | struct osst_request * SRpnt = NULL; |
1da177e4 LT |
4829 | char * name = tape_name(STp); |
4830 | ||
4831 | if (file_count(filp) > 1) | |
4832 | return 0; | |
4833 | ||
4834 | if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) { | |
4835 | STp->write_type = OS_WRITE_DATA; | |
4836 | result = osst_flush_write_buffer(STp, &SRpnt); | |
4837 | if (result != 0 && result != (-ENOSPC)) | |
4838 | goto out; | |
4839 | } | |
4840 | if ( STps->rw >= ST_WRITING && !STp->pos_unknown) { | |
4841 | ||
4842 | #if DEBUG | |
4843 | if (debugging) { | |
4844 | printk(OSST_DEB_MSG "%s:D: File length %ld bytes.\n", | |
4845 | name, (long)(filp->f_pos)); | |
4846 | printk(OSST_DEB_MSG "%s:D: Async write waits %d, finished %d.\n", | |
4847 | name, STp->nbr_waits, STp->nbr_finished); | |
4848 | } | |
4849 | #endif | |
4850 | result = osst_write_trailer(STp, &SRpnt, !(STp->rew_at_close)); | |
4851 | #if DEBUG | |
4852 | if (debugging) | |
4853 | printk(OSST_DEB_MSG "%s:D: Buffer flushed, %d EOF(s) written\n", | |
4854 | name, 1+STp->two_fm); | |
4855 | #endif | |
4856 | } | |
4857 | else if (!STp->rew_at_close) { | |
4858 | STps = &(STp->ps[STp->partition]); | |
4859 | if (!STm->sysv || STps->rw != ST_READING) { | |
4860 | if (STp->can_bsr) | |
4861 | result = osst_flush_buffer(STp, &SRpnt, 0); /* this is the default path */ | |
4862 | else if (STps->eof == ST_FM_HIT) { | |
4863 | result = cross_eof(STp, &SRpnt, 0); | |
4864 | if (result) { | |
4865 | if (STps->drv_file >= 0) | |
4866 | STps->drv_file++; | |
4867 | STps->drv_block = 0; | |
4868 | STps->eof = ST_FM; | |
4869 | } | |
4870 | else | |
4871 | STps->eof = ST_NOEOF; | |
4872 | } | |
4873 | } | |
4874 | else if ((STps->eof == ST_NOEOF && | |
4875 | !(result = cross_eof(STp, &SRpnt, 1))) || | |
4876 | STps->eof == ST_FM_HIT) { | |
4877 | if (STps->drv_file >= 0) | |
4878 | STps->drv_file++; | |
4879 | STps->drv_block = 0; | |
4880 | STps->eof = ST_FM; | |
4881 | } | |
4882 | } | |
4883 | ||
4884 | out: | |
4885 | if (STp->rew_at_close) { | |
4886 | result2 = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos); | |
4887 | STps->drv_file = STps->drv_block = STp->frame_seq_number = STp->logical_blk_num = 0; | |
4888 | if (result == 0 && result2 < 0) | |
4889 | result = result2; | |
4890 | } | |
5e6575c0 | 4891 | if (SRpnt) osst_release_request(SRpnt); |
1da177e4 LT |
4892 | |
4893 | if (STp->abort_count || STp->recover_count) { | |
4894 | printk(KERN_INFO "%s:I:", name); | |
4895 | if (STp->abort_count) | |
4896 | printk(" %d unrecovered errors", STp->abort_count); | |
4897 | if (STp->recover_count) | |
4898 | printk(" %d recovered errors", STp->recover_count); | |
4899 | if (STp->write_count) | |
4900 | printk(" in %d frames written", STp->write_count); | |
4901 | if (STp->read_count) | |
4902 | printk(" in %d frames read", STp->read_count); | |
4903 | printk("\n"); | |
4904 | STp->recover_count = 0; | |
4905 | STp->abort_count = 0; | |
4906 | } | |
4907 | STp->write_count = 0; | |
4908 | STp->read_count = 0; | |
4909 | ||
4910 | return result; | |
4911 | } | |
4912 | ||
4913 | ||
4914 | /* Close the device and release it */ | |
4915 | static int os_scsi_tape_close(struct inode * inode, struct file * filp) | |
4916 | { | |
4917 | int result = 0; | |
4918 | struct osst_tape * STp = filp->private_data; | |
4919 | ||
4920 | if (STp->door_locked == ST_LOCKED_AUTO) | |
4921 | do_door_lock(STp, 0); | |
4922 | ||
4923 | if (STp->raw) | |
4924 | STp->header_ok = 0; | |
4925 | ||
4926 | normalize_buffer(STp->buffer); | |
4927 | write_lock(&os_scsi_tapes_lock); | |
4928 | STp->in_use = 0; | |
4929 | write_unlock(&os_scsi_tapes_lock); | |
4930 | ||
4931 | scsi_device_put(STp->device); | |
4932 | ||
4933 | return result; | |
4934 | } | |
4935 | ||
4936 | ||
4937 | /* The ioctl command */ | |
f4927c45 | 4938 | static long osst_ioctl(struct file * file, |
1da177e4 LT |
4939 | unsigned int cmd_in, unsigned long arg) |
4940 | { | |
45223fd7 | 4941 | int i, cmd_nr, cmd_type, blk, retval = 0; |
1da177e4 LT |
4942 | struct st_modedef * STm; |
4943 | struct st_partstat * STps; | |
5e6575c0 | 4944 | struct osst_request * SRpnt = NULL; |
1da177e4 LT |
4945 | struct osst_tape * STp = file->private_data; |
4946 | char * name = tape_name(STp); | |
4947 | void __user * p = (void __user *)arg; | |
4948 | ||
c45d15d2 | 4949 | mutex_lock(&osst_int_mutex); |
f4927c45 | 4950 | if (mutex_lock_interruptible(&STp->lock)) { |
c45d15d2 | 4951 | mutex_unlock(&osst_int_mutex); |
1da177e4 | 4952 | return -ERESTARTSYS; |
f4927c45 | 4953 | } |
1da177e4 LT |
4954 | |
4955 | #if DEBUG | |
4956 | if (debugging && !STp->in_use) { | |
4957 | printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); | |
4958 | retval = (-EIO); | |
4959 | goto out; | |
4960 | } | |
4961 | #endif | |
4962 | STm = &(STp->modes[STp->current_mode]); | |
4963 | STps = &(STp->ps[STp->partition]); | |
4964 | ||
4965 | /* | |
4966 | * If we are in the middle of error recovery, don't let anyone | |
4967 | * else try and use this device. Also, if error recovery fails, it | |
4968 | * may try and take the device offline, in which case all further | |
4969 | * access to the device is prohibited. | |
4970 | */ | |
906d15fb CH |
4971 | retval = scsi_ioctl_block_when_processing_errors(STp->device, cmd_in, |
4972 | file->f_flags & O_NDELAY); | |
4973 | if (retval) | |
1da177e4 | 4974 | goto out; |
1da177e4 LT |
4975 | |
4976 | cmd_type = _IOC_TYPE(cmd_in); | |
4977 | cmd_nr = _IOC_NR(cmd_in); | |
4978 | #if DEBUG | |
4979 | printk(OSST_DEB_MSG "%s:D: Ioctl %d,%d in %s mode\n", name, | |
4980 | cmd_type, cmd_nr, STp->raw?"raw":"normal"); | |
4981 | #endif | |
4982 | if (cmd_type == _IOC_TYPE(MTIOCTOP) && cmd_nr == _IOC_NR(MTIOCTOP)) { | |
4983 | struct mtop mtc; | |
4984 | int auto_weof = 0; | |
4985 | ||
4986 | if (_IOC_SIZE(cmd_in) != sizeof(mtc)) { | |
4987 | retval = (-EINVAL); | |
4988 | goto out; | |
4989 | } | |
4990 | ||
4991 | i = copy_from_user((char *) &mtc, p, sizeof(struct mtop)); | |
4992 | if (i) { | |
4993 | retval = (-EFAULT); | |
4994 | goto out; | |
4995 | } | |
4996 | ||
4997 | if (mtc.mt_op == MTSETDRVBUFFER && !capable(CAP_SYS_ADMIN)) { | |
4998 | printk(KERN_WARNING "%s:W: MTSETDRVBUFFER only allowed for root.\n", name); | |
4999 | retval = (-EPERM); | |
5000 | goto out; | |
5001 | } | |
5002 | ||
5003 | if (!STm->defined && (mtc.mt_op != MTSETDRVBUFFER && (mtc.mt_count & MT_ST_OPTIONS) == 0)) { | |
5004 | retval = (-ENXIO); | |
5005 | goto out; | |
5006 | } | |
5007 | ||
5008 | if (!STp->pos_unknown) { | |
5009 | ||
5010 | if (STps->eof == ST_FM_HIT) { | |
5011 | if (mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM|| mtc.mt_op == MTEOM) { | |
5012 | mtc.mt_count -= 1; | |
5013 | if (STps->drv_file >= 0) | |
5014 | STps->drv_file += 1; | |
5015 | } | |
5016 | else if (mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM) { | |
5017 | mtc.mt_count += 1; | |
5018 | if (STps->drv_file >= 0) | |
5019 | STps->drv_file += 1; | |
5020 | } | |
5021 | } | |
5022 | ||
5023 | if (mtc.mt_op == MTSEEK) { | |
5024 | /* Old position must be restored if partition will be changed */ | |
5025 | i = !STp->can_partitions || (STp->new_partition != STp->partition); | |
5026 | } | |
5027 | else { | |
5028 | i = mtc.mt_op == MTREW || mtc.mt_op == MTOFFL || | |
5029 | mtc.mt_op == MTRETEN || mtc.mt_op == MTEOM || | |
5030 | mtc.mt_op == MTLOCK || mtc.mt_op == MTLOAD || | |
5031 | mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM || | |
5032 | mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM || | |
5033 | mtc.mt_op == MTCOMPRESSION; | |
5034 | } | |
5035 | i = osst_flush_buffer(STp, &SRpnt, i); | |
5036 | if (i < 0) { | |
5037 | retval = i; | |
5038 | goto out; | |
5039 | } | |
5040 | } | |
5041 | else { | |
5042 | /* | |
5043 | * If there was a bus reset, block further access | |
5044 | * to this device. If the user wants to rewind the tape, | |
5045 | * then reset the flag and allow access again. | |
5046 | */ | |
5047 | if(mtc.mt_op != MTREW && | |
5048 | mtc.mt_op != MTOFFL && | |
5049 | mtc.mt_op != MTRETEN && | |
5050 | mtc.mt_op != MTERASE && | |
5051 | mtc.mt_op != MTSEEK && | |
5052 | mtc.mt_op != MTEOM) { | |
5053 | retval = (-EIO); | |
5054 | goto out; | |
5055 | } | |
5056 | reset_state(STp); | |
5057 | /* remove this when the midlevel properly clears was_reset */ | |
5058 | STp->device->was_reset = 0; | |
5059 | } | |
5060 | ||
5061 | if (mtc.mt_op != MTCOMPRESSION && mtc.mt_op != MTLOCK && | |
5062 | mtc.mt_op != MTNOP && mtc.mt_op != MTSETBLK && | |
5063 | mtc.mt_op != MTSETDENSITY && mtc.mt_op != MTSETDRVBUFFER && | |
5064 | mtc.mt_op != MTMKPART && mtc.mt_op != MTSETPART && | |
5065 | mtc.mt_op != MTWEOF && mtc.mt_op != MTWSM ) { | |
5066 | ||
5067 | /* | |
5068 | * The user tells us to move to another position on the tape. | |
5069 | * If we were appending to the tape content, that would leave | |
5070 | * the tape without proper end, in that case write EOD and | |
5071 | * update the header to reflect its position. | |
5072 | */ | |
5073 | #if DEBUG | |
5074 | printk(KERN_WARNING "%s:D: auto_weod %s at ffp=%d,efp=%d,fsn=%d,lbn=%d,fn=%d,bn=%d\n", name, | |
5075 | STps->rw >= ST_WRITING ? "write" : STps->rw == ST_READING ? "read" : "idle", | |
5076 | STp->first_frame_position, STp->eod_frame_ppos, STp->frame_seq_number, | |
5077 | STp->logical_blk_num, STps->drv_file, STps->drv_block ); | |
5078 | #endif | |
5079 | if (STps->rw >= ST_WRITING && STp->first_frame_position >= STp->eod_frame_ppos) { | |
5080 | auto_weof = ((STp->write_type != OS_WRITE_NEW_MARK) && | |
5081 | !(mtc.mt_op == MTREW || mtc.mt_op == MTOFFL)); | |
5082 | i = osst_write_trailer(STp, &SRpnt, | |
5083 | !(mtc.mt_op == MTREW || mtc.mt_op == MTOFFL)); | |
5084 | #if DEBUG | |
5085 | printk(KERN_WARNING "%s:D: post trailer xeof=%d,ffp=%d,efp=%d,fsn=%d,lbn=%d,fn=%d,bn=%d\n", | |
5086 | name, auto_weof, STp->first_frame_position, STp->eod_frame_ppos, | |
5087 | STp->frame_seq_number, STp->logical_blk_num, STps->drv_file, STps->drv_block ); | |
5088 | #endif | |
5089 | if (i < 0) { | |
5090 | retval = i; | |
5091 | goto out; | |
5092 | } | |
5093 | } | |
5094 | STps->rw = ST_IDLE; | |
5095 | } | |
5096 | ||
5097 | if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED) | |
5098 | do_door_lock(STp, 0); /* Ignore result! */ | |
5099 | ||
5100 | if (mtc.mt_op == MTSETDRVBUFFER && | |
5101 | (mtc.mt_count & MT_ST_OPTIONS) != 0) { | |
5102 | retval = osst_set_options(STp, mtc.mt_count); | |
5103 | goto out; | |
5104 | } | |
5105 | ||
5106 | if (mtc.mt_op == MTSETPART) { | |
5107 | if (mtc.mt_count >= STp->nbr_partitions) | |
5108 | retval = -EINVAL; | |
5109 | else { | |
5110 | STp->new_partition = mtc.mt_count; | |
5111 | retval = 0; | |
5112 | } | |
5113 | goto out; | |
5114 | } | |
5115 | ||
5116 | if (mtc.mt_op == MTMKPART) { | |
5117 | if (!STp->can_partitions) { | |
5118 | retval = (-EINVAL); | |
5119 | goto out; | |
5120 | } | |
5121 | if ((i = osst_int_ioctl(STp, &SRpnt, MTREW, 0)) < 0 /*|| | |
5122 | (i = partition_tape(inode, mtc.mt_count)) < 0*/) { | |
5123 | retval = i; | |
5124 | goto out; | |
5125 | } | |
5126 | for (i=0; i < ST_NBR_PARTITIONS; i++) { | |
5127 | STp->ps[i].rw = ST_IDLE; | |
5128 | STp->ps[i].at_sm = 0; | |
5129 | STp->ps[i].last_block_valid = 0; | |
5130 | } | |
5131 | STp->partition = STp->new_partition = 0; | |
5132 | STp->nbr_partitions = 1; /* Bad guess ?-) */ | |
5133 | STps->drv_block = STps->drv_file = 0; | |
5134 | retval = 0; | |
5135 | goto out; | |
5136 | } | |
5137 | ||
5138 | if (mtc.mt_op == MTSEEK) { | |
5139 | if (STp->raw) | |
5140 | i = osst_set_frame_position(STp, &SRpnt, mtc.mt_count, 0); | |
5141 | else | |
5142 | i = osst_seek_sector(STp, &SRpnt, mtc.mt_count); | |
5143 | if (!STp->can_partitions) | |
5144 | STp->ps[0].rw = ST_IDLE; | |
5145 | retval = i; | |
5146 | goto out; | |
5147 | } | |
5148 | ||
5149 | if (mtc.mt_op == MTLOCK || mtc.mt_op == MTUNLOCK) { | |
5150 | retval = do_door_lock(STp, (mtc.mt_op == MTLOCK)); | |
5151 | goto out; | |
5152 | } | |
5153 | ||
5154 | if (auto_weof) | |
5155 | cross_eof(STp, &SRpnt, 0); | |
5156 | ||
5157 | if (mtc.mt_op == MTCOMPRESSION) | |
5158 | retval = -EINVAL; /* OnStream drives don't have compression hardware */ | |
5159 | else | |
5160 | /* MTBSF MTBSFM MTBSR MTBSS MTEOM MTERASE MTFSF MTFSFB MTFSR MTFSS | |
5161 | * MTLOAD MTOFFL MTRESET MTRETEN MTREW MTUNLOAD MTWEOF MTWSM */ | |
5162 | retval = osst_int_ioctl(STp, &SRpnt, mtc.mt_op, mtc.mt_count); | |
5163 | goto out; | |
5164 | } | |
5165 | ||
5166 | if (!STm->defined) { | |
5167 | retval = (-ENXIO); | |
5168 | goto out; | |
5169 | } | |
5170 | ||
5171 | if ((i = osst_flush_buffer(STp, &SRpnt, 0)) < 0) { | |
5172 | retval = i; | |
5173 | goto out; | |
5174 | } | |
5175 | ||
5176 | if (cmd_type == _IOC_TYPE(MTIOCGET) && cmd_nr == _IOC_NR(MTIOCGET)) { | |
5177 | struct mtget mt_status; | |
5178 | ||
5179 | if (_IOC_SIZE(cmd_in) != sizeof(struct mtget)) { | |
5180 | retval = (-EINVAL); | |
5181 | goto out; | |
5182 | } | |
5183 | ||
5184 | mt_status.mt_type = MT_ISONSTREAM_SC; | |
5185 | mt_status.mt_erreg = STp->recover_erreg << MT_ST_SOFTERR_SHIFT; | |
5186 | mt_status.mt_dsreg = | |
5187 | ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) | | |
5188 | ((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK); | |
5189 | mt_status.mt_blkno = STps->drv_block; | |
5190 | mt_status.mt_fileno = STps->drv_file; | |
5191 | if (STp->block_size != 0) { | |
5192 | if (STps->rw == ST_WRITING) | |
5193 | mt_status.mt_blkno += (STp->buffer)->buffer_bytes / STp->block_size; | |
5194 | else if (STps->rw == ST_READING) | |
5195 | mt_status.mt_blkno -= ((STp->buffer)->buffer_bytes + | |
5196 | STp->block_size - 1) / STp->block_size; | |
5197 | } | |
5198 | ||
5199 | mt_status.mt_gstat = 0; | |
5200 | if (STp->drv_write_prot) | |
5201 | mt_status.mt_gstat |= GMT_WR_PROT(0xffffffff); | |
5202 | if (mt_status.mt_blkno == 0) { | |
5203 | if (mt_status.mt_fileno == 0) | |
5204 | mt_status.mt_gstat |= GMT_BOT(0xffffffff); | |
5205 | else | |
5206 | mt_status.mt_gstat |= GMT_EOF(0xffffffff); | |
5207 | } | |
5208 | mt_status.mt_resid = STp->partition; | |
5209 | if (STps->eof == ST_EOM_OK || STps->eof == ST_EOM_ERROR) | |
5210 | mt_status.mt_gstat |= GMT_EOT(0xffffffff); | |
5211 | else if (STps->eof >= ST_EOM_OK) | |
5212 | mt_status.mt_gstat |= GMT_EOD(0xffffffff); | |
5213 | if (STp->density == 1) | |
5214 | mt_status.mt_gstat |= GMT_D_800(0xffffffff); | |
5215 | else if (STp->density == 2) | |
5216 | mt_status.mt_gstat |= GMT_D_1600(0xffffffff); | |
5217 | else if (STp->density == 3) | |
5218 | mt_status.mt_gstat |= GMT_D_6250(0xffffffff); | |
5219 | if (STp->ready == ST_READY) | |
5220 | mt_status.mt_gstat |= GMT_ONLINE(0xffffffff); | |
5221 | if (STp->ready == ST_NO_TAPE) | |
5222 | mt_status.mt_gstat |= GMT_DR_OPEN(0xffffffff); | |
5223 | if (STps->at_sm) | |
5224 | mt_status.mt_gstat |= GMT_SM(0xffffffff); | |
5225 | if (STm->do_async_writes || (STm->do_buffer_writes && STp->block_size != 0) || | |
5226 | STp->drv_buffer != 0) | |
5227 | mt_status.mt_gstat |= GMT_IM_REP_EN(0xffffffff); | |
5228 | ||
5229 | i = copy_to_user(p, &mt_status, sizeof(struct mtget)); | |
5230 | if (i) { | |
5231 | retval = (-EFAULT); | |
5232 | goto out; | |
5233 | } | |
5234 | ||
5235 | STp->recover_erreg = 0; /* Clear after read */ | |
5236 | retval = 0; | |
5237 | goto out; | |
5238 | } /* End of MTIOCGET */ | |
5239 | ||
5240 | if (cmd_type == _IOC_TYPE(MTIOCPOS) && cmd_nr == _IOC_NR(MTIOCPOS)) { | |
5241 | struct mtpos mt_pos; | |
5242 | ||
5243 | if (_IOC_SIZE(cmd_in) != sizeof(struct mtpos)) { | |
5244 | retval = (-EINVAL); | |
5245 | goto out; | |
5246 | } | |
5247 | if (STp->raw) | |
5248 | blk = osst_get_frame_position(STp, &SRpnt); | |
5249 | else | |
5250 | blk = osst_get_sector(STp, &SRpnt); | |
5251 | if (blk < 0) { | |
5252 | retval = blk; | |
5253 | goto out; | |
5254 | } | |
5255 | mt_pos.mt_blkno = blk; | |
5256 | i = copy_to_user(p, &mt_pos, sizeof(struct mtpos)); | |
5257 | if (i) | |
5258 | retval = -EFAULT; | |
5259 | goto out; | |
5260 | } | |
5e6575c0 | 5261 | if (SRpnt) osst_release_request(SRpnt); |
1da177e4 | 5262 | |
4390e601 | 5263 | mutex_unlock(&STp->lock); |
1da177e4 | 5264 | |
f4927c45 | 5265 | retval = scsi_ioctl(STp->device, cmd_in, p); |
c45d15d2 | 5266 | mutex_unlock(&osst_int_mutex); |
f4927c45 | 5267 | return retval; |
1da177e4 LT |
5268 | |
5269 | out: | |
5e6575c0 | 5270 | if (SRpnt) osst_release_request(SRpnt); |
1da177e4 | 5271 | |
4390e601 | 5272 | mutex_unlock(&STp->lock); |
c45d15d2 | 5273 | mutex_unlock(&osst_int_mutex); |
1da177e4 LT |
5274 | |
5275 | return retval; | |
5276 | } | |
5277 | ||
5278 | #ifdef CONFIG_COMPAT | |
5279 | static long osst_compat_ioctl(struct file * file, unsigned int cmd_in, unsigned long arg) | |
5280 | { | |
5281 | struct osst_tape *STp = file->private_data; | |
5282 | struct scsi_device *sdev = STp->device; | |
5283 | int ret = -ENOIOCTLCMD; | |
5284 | if (sdev->host->hostt->compat_ioctl) { | |
5285 | ||
5286 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd_in, (void __user *)arg); | |
5287 | ||
5288 | } | |
5289 | return ret; | |
5290 | } | |
5291 | #endif | |
5292 | ||
5293 | ||
5294 | \f | |
5295 | /* Memory handling routines */ | |
5296 | ||
5297 | /* Try to allocate a new tape buffer skeleton. Caller must not hold os_scsi_tapes_lock */ | |
5298 | static struct osst_buffer * new_tape_buffer( int from_initialization, int need_dma, int max_sg ) | |
5299 | { | |
c53033f6 AV |
5300 | int i; |
5301 | gfp_t priority; | |
1da177e4 LT |
5302 | struct osst_buffer *tb; |
5303 | ||
5304 | if (from_initialization) | |
5305 | priority = GFP_ATOMIC; | |
5306 | else | |
5307 | priority = GFP_KERNEL; | |
5308 | ||
5309 | i = sizeof(struct osst_buffer) + (osst_max_sg_segs - 1) * sizeof(struct scatterlist); | |
37e0333c | 5310 | tb = kzalloc(i, priority); |
1da177e4 LT |
5311 | if (!tb) { |
5312 | printk(KERN_NOTICE "osst :I: Can't allocate new tape buffer.\n"); | |
5313 | return NULL; | |
5314 | } | |
37e0333c | 5315 | |
1da177e4 LT |
5316 | tb->sg_segs = tb->orig_sg_segs = 0; |
5317 | tb->use_sg = max_sg; | |
5318 | tb->in_use = 1; | |
5319 | tb->dma = need_dma; | |
5320 | tb->buffer_size = 0; | |
5321 | #if DEBUG | |
5322 | if (debugging) | |
5323 | printk(OSST_DEB_MSG | |
5324 | "osst :D: Allocated tape buffer skeleton (%d bytes, %d segments, dma: %d).\n", | |
5325 | i, max_sg, need_dma); | |
5326 | #endif | |
5327 | return tb; | |
5328 | } | |
5329 | ||
5330 | /* Try to allocate a temporary (while a user has the device open) enlarged tape buffer */ | |
5331 | static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma) | |
5332 | { | |
c53033f6 AV |
5333 | int segs, nbr, max_segs, b_size, order, got; |
5334 | gfp_t priority; | |
1da177e4 LT |
5335 | |
5336 | if (STbuffer->buffer_size >= OS_FRAME_SIZE) | |
5337 | return 1; | |
5338 | ||
5339 | if (STbuffer->sg_segs) { | |
5340 | printk(KERN_WARNING "osst :A: Buffer not previously normalized.\n"); | |
5341 | normalize_buffer(STbuffer); | |
5342 | } | |
5343 | /* See how many segments we can use -- need at least two */ | |
5344 | nbr = max_segs = STbuffer->use_sg; | |
5345 | if (nbr <= 2) | |
5346 | return 0; | |
5347 | ||
5348 | priority = GFP_KERNEL /* | __GFP_NOWARN */; | |
5349 | if (need_dma) | |
5350 | priority |= GFP_DMA; | |
5351 | ||
5352 | /* Try to allocate the first segment up to OS_DATA_SIZE and the others | |
5353 | big enough to reach the goal (code assumes no segments in place) */ | |
5354 | for (b_size = OS_DATA_SIZE, order = OSST_FIRST_ORDER; b_size >= PAGE_SIZE; order--, b_size /= 2) { | |
45711f1a JA |
5355 | struct page *page = alloc_pages(priority, order); |
5356 | ||
1da177e4 | 5357 | STbuffer->sg[0].offset = 0; |
45711f1a | 5358 | if (page != NULL) { |
642f1490 | 5359 | sg_set_page(&STbuffer->sg[0], page, b_size, 0); |
45711f1a | 5360 | STbuffer->b_data = page_address(page); |
1da177e4 LT |
5361 | break; |
5362 | } | |
5363 | } | |
45711f1a | 5364 | if (sg_page(&STbuffer->sg[0]) == NULL) { |
1da177e4 LT |
5365 | printk(KERN_NOTICE "osst :I: Can't allocate tape buffer main segment.\n"); |
5366 | return 0; | |
5367 | } | |
5368 | /* Got initial segment of 'bsize,order', continue with same size if possible, except for AUX */ | |
5369 | for (segs=STbuffer->sg_segs=1, got=b_size; | |
5370 | segs < max_segs && got < OS_FRAME_SIZE; ) { | |
45711f1a | 5371 | struct page *page = alloc_pages(priority, (OS_FRAME_SIZE - got <= PAGE_SIZE) ? 0 : order); |
1da177e4 | 5372 | STbuffer->sg[segs].offset = 0; |
45711f1a | 5373 | if (page == NULL) { |
1da177e4 LT |
5374 | printk(KERN_WARNING "osst :W: Failed to enlarge buffer to %d bytes.\n", |
5375 | OS_FRAME_SIZE); | |
5376 | #if DEBUG | |
5377 | STbuffer->buffer_size = got; | |
5378 | #endif | |
5379 | normalize_buffer(STbuffer); | |
5380 | return 0; | |
5381 | } | |
642f1490 | 5382 | sg_set_page(&STbuffer->sg[segs], page, (OS_FRAME_SIZE - got <= PAGE_SIZE / 2) ? (OS_FRAME_SIZE - got) : b_size, 0); |
1da177e4 LT |
5383 | got += STbuffer->sg[segs].length; |
5384 | STbuffer->buffer_size = got; | |
5385 | STbuffer->sg_segs = ++segs; | |
5386 | } | |
5387 | #if DEBUG | |
5388 | if (debugging) { | |
5389 | printk(OSST_DEB_MSG | |
5390 | "osst :D: Expanded tape buffer (%d bytes, %d->%d segments, dma: %d, at: %p).\n", | |
5391 | got, STbuffer->orig_sg_segs, STbuffer->sg_segs, need_dma, STbuffer->b_data); | |
5392 | printk(OSST_DEB_MSG | |
5393 | "osst :D: segment sizes: first %d at %p, last %d bytes at %p.\n", | |
5394 | STbuffer->sg[0].length, page_address(STbuffer->sg[0].page), | |
5395 | STbuffer->sg[segs-1].length, page_address(STbuffer->sg[segs-1].page)); | |
5396 | } | |
5397 | #endif | |
5398 | ||
5399 | return 1; | |
5400 | } | |
5401 | ||
5402 | ||
5403 | /* Release the segments */ | |
5404 | static void normalize_buffer(struct osst_buffer *STbuffer) | |
5405 | { | |
5406 | int i, order, b_size; | |
5407 | ||
5408 | for (i=0; i < STbuffer->sg_segs; i++) { | |
5409 | ||
5410 | for (b_size = PAGE_SIZE, order = 0; | |
5411 | b_size < STbuffer->sg[i].length; | |
5412 | b_size *= 2, order++); | |
5413 | ||
45711f1a | 5414 | __free_pages(sg_page(&STbuffer->sg[i]), order); |
1da177e4 LT |
5415 | STbuffer->buffer_size -= STbuffer->sg[i].length; |
5416 | } | |
5417 | #if DEBUG | |
5418 | if (debugging && STbuffer->orig_sg_segs < STbuffer->sg_segs) | |
5419 | printk(OSST_DEB_MSG "osst :D: Buffer at %p normalized to %d bytes (segs %d).\n", | |
5420 | STbuffer->b_data, STbuffer->buffer_size, STbuffer->sg_segs); | |
5421 | #endif | |
5422 | STbuffer->sg_segs = STbuffer->orig_sg_segs = 0; | |
5423 | } | |
5424 | ||
5425 | ||
5426 | /* Move data from the user buffer to the tape buffer. Returns zero (success) or | |
5427 | negative error code. */ | |
5428 | static int append_to_buffer(const char __user *ubp, struct osst_buffer *st_bp, int do_count) | |
5429 | { | |
5430 | int i, cnt, res, offset; | |
5431 | ||
5432 | for (i=0, offset=st_bp->buffer_bytes; | |
5433 | i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) | |
5434 | offset -= st_bp->sg[i].length; | |
5435 | if (i == st_bp->sg_segs) { /* Should never happen */ | |
5436 | printk(KERN_WARNING "osst :A: Append_to_buffer offset overflow.\n"); | |
5437 | return (-EIO); | |
5438 | } | |
5439 | for ( ; i < st_bp->sg_segs && do_count > 0; i++) { | |
5440 | cnt = st_bp->sg[i].length - offset < do_count ? | |
5441 | st_bp->sg[i].length - offset : do_count; | |
45711f1a | 5442 | res = copy_from_user(page_address(sg_page(&st_bp->sg[i])) + offset, ubp, cnt); |
1da177e4 LT |
5443 | if (res) |
5444 | return (-EFAULT); | |
5445 | do_count -= cnt; | |
5446 | st_bp->buffer_bytes += cnt; | |
5447 | ubp += cnt; | |
5448 | offset = 0; | |
5449 | } | |
5450 | if (do_count) { /* Should never happen */ | |
5451 | printk(KERN_WARNING "osst :A: Append_to_buffer overflow (left %d).\n", | |
5452 | do_count); | |
5453 | return (-EIO); | |
5454 | } | |
5455 | return 0; | |
5456 | } | |
5457 | ||
5458 | ||
5459 | /* Move data from the tape buffer to the user buffer. Returns zero (success) or | |
5460 | negative error code. */ | |
5461 | static int from_buffer(struct osst_buffer *st_bp, char __user *ubp, int do_count) | |
5462 | { | |
5463 | int i, cnt, res, offset; | |
5464 | ||
5465 | for (i=0, offset=st_bp->read_pointer; | |
5466 | i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) | |
5467 | offset -= st_bp->sg[i].length; | |
5468 | if (i == st_bp->sg_segs) { /* Should never happen */ | |
5469 | printk(KERN_WARNING "osst :A: From_buffer offset overflow.\n"); | |
5470 | return (-EIO); | |
5471 | } | |
5472 | for ( ; i < st_bp->sg_segs && do_count > 0; i++) { | |
5473 | cnt = st_bp->sg[i].length - offset < do_count ? | |
5474 | st_bp->sg[i].length - offset : do_count; | |
45711f1a | 5475 | res = copy_to_user(ubp, page_address(sg_page(&st_bp->sg[i])) + offset, cnt); |
1da177e4 LT |
5476 | if (res) |
5477 | return (-EFAULT); | |
5478 | do_count -= cnt; | |
5479 | st_bp->buffer_bytes -= cnt; | |
5480 | st_bp->read_pointer += cnt; | |
5481 | ubp += cnt; | |
5482 | offset = 0; | |
5483 | } | |
5484 | if (do_count) { /* Should never happen */ | |
5485 | printk(KERN_WARNING "osst :A: From_buffer overflow (left %d).\n", do_count); | |
5486 | return (-EIO); | |
5487 | } | |
5488 | return 0; | |
5489 | } | |
5490 | ||
5491 | /* Sets the tail of the buffer after fill point to zero. | |
5492 | Returns zero (success) or negative error code. */ | |
5493 | static int osst_zero_buffer_tail(struct osst_buffer *st_bp) | |
5494 | { | |
5495 | int i, offset, do_count, cnt; | |
5496 | ||
5497 | for (i = 0, offset = st_bp->buffer_bytes; | |
5498 | i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) | |
5499 | offset -= st_bp->sg[i].length; | |
5500 | if (i == st_bp->sg_segs) { /* Should never happen */ | |
5501 | printk(KERN_WARNING "osst :A: Zero_buffer offset overflow.\n"); | |
5502 | return (-EIO); | |
5503 | } | |
5504 | for (do_count = OS_DATA_SIZE - st_bp->buffer_bytes; | |
5505 | i < st_bp->sg_segs && do_count > 0; i++) { | |
5506 | cnt = st_bp->sg[i].length - offset < do_count ? | |
5507 | st_bp->sg[i].length - offset : do_count ; | |
45711f1a | 5508 | memset(page_address(sg_page(&st_bp->sg[i])) + offset, 0, cnt); |
1da177e4 LT |
5509 | do_count -= cnt; |
5510 | offset = 0; | |
5511 | } | |
5512 | if (do_count) { /* Should never happen */ | |
5513 | printk(KERN_WARNING "osst :A: Zero_buffer overflow (left %d).\n", do_count); | |
5514 | return (-EIO); | |
5515 | } | |
5516 | return 0; | |
5517 | } | |
5518 | ||
5519 | /* Copy a osst 32K chunk of memory into the buffer. | |
5520 | Returns zero (success) or negative error code. */ | |
5521 | static int osst_copy_to_buffer(struct osst_buffer *st_bp, unsigned char *ptr) | |
5522 | { | |
5523 | int i, cnt, do_count = OS_DATA_SIZE; | |
5524 | ||
5525 | for (i = 0; i < st_bp->sg_segs && do_count > 0; i++) { | |
5526 | cnt = st_bp->sg[i].length < do_count ? | |
5527 | st_bp->sg[i].length : do_count ; | |
45711f1a | 5528 | memcpy(page_address(sg_page(&st_bp->sg[i])), ptr, cnt); |
1da177e4 LT |
5529 | do_count -= cnt; |
5530 | ptr += cnt; | |
5531 | } | |
5532 | if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ | |
5533 | printk(KERN_WARNING "osst :A: Copy_to_buffer overflow (left %d at sg %d).\n", | |
5534 | do_count, i); | |
5535 | return (-EIO); | |
5536 | } | |
5537 | return 0; | |
5538 | } | |
5539 | ||
5540 | /* Copy a osst 32K chunk of memory from the buffer. | |
5541 | Returns zero (success) or negative error code. */ | |
5542 | static int osst_copy_from_buffer(struct osst_buffer *st_bp, unsigned char *ptr) | |
5543 | { | |
5544 | int i, cnt, do_count = OS_DATA_SIZE; | |
5545 | ||
5546 | for (i = 0; i < st_bp->sg_segs && do_count > 0; i++) { | |
5547 | cnt = st_bp->sg[i].length < do_count ? | |
5548 | st_bp->sg[i].length : do_count ; | |
45711f1a | 5549 | memcpy(ptr, page_address(sg_page(&st_bp->sg[i])), cnt); |
1da177e4 LT |
5550 | do_count -= cnt; |
5551 | ptr += cnt; | |
5552 | } | |
5553 | if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ | |
5554 | printk(KERN_WARNING "osst :A: Copy_from_buffer overflow (left %d at sg %d).\n", | |
5555 | do_count, i); | |
5556 | return (-EIO); | |
5557 | } | |
5558 | return 0; | |
5559 | } | |
5560 | ||
5561 | \f | |
5562 | /* Module housekeeping */ | |
5563 | ||
5564 | static void validate_options (void) | |
5565 | { | |
5566 | if (max_dev > 0) | |
5567 | osst_max_dev = max_dev; | |
5568 | if (write_threshold_kbs > 0) | |
5569 | osst_write_threshold = write_threshold_kbs * ST_KILOBYTE; | |
5570 | if (osst_write_threshold > osst_buffer_size) | |
5571 | osst_write_threshold = osst_buffer_size; | |
5572 | if (max_sg_segs >= OSST_FIRST_SG) | |
5573 | osst_max_sg_segs = max_sg_segs; | |
5574 | #if DEBUG | |
5575 | printk(OSST_DEB_MSG "osst :D: max tapes %d, write threshold %d, max s/g segs %d.\n", | |
5576 | osst_max_dev, osst_write_threshold, osst_max_sg_segs); | |
5577 | #endif | |
5578 | } | |
5579 | ||
5580 | #ifndef MODULE | |
5581 | /* Set the boot options. Syntax: osst=xxx,yyy,... | |
5582 | where xxx is write threshold in 1024 byte blocks, | |
5583 | and yyy is number of s/g segments to use. */ | |
5584 | static int __init osst_setup (char *str) | |
5585 | { | |
5586 | int i, ints[5]; | |
5587 | char *stp; | |
5588 | ||
5589 | stp = get_options(str, ARRAY_SIZE(ints), ints); | |
6391a113 | 5590 | |
1da177e4 LT |
5591 | if (ints[0] > 0) { |
5592 | for (i = 0; i < ints[0] && i < ARRAY_SIZE(parms); i++) | |
5593 | *parms[i].val = ints[i + 1]; | |
5594 | } else { | |
5595 | while (stp != NULL) { | |
5596 | for (i = 0; i < ARRAY_SIZE(parms); i++) { | |
5597 | int len = strlen(parms[i].name); | |
5598 | if (!strncmp(stp, parms[i].name, len) && | |
5599 | (*(stp + len) == ':' || *(stp + len) == '=')) { | |
5600 | *parms[i].val = | |
5601 | simple_strtoul(stp + len + 1, NULL, 0); | |
5602 | break; | |
5603 | } | |
5604 | } | |
6391a113 | 5605 | if (i >= ARRAY_SIZE(parms)) |
1da177e4 LT |
5606 | printk(KERN_INFO "osst :I: Illegal parameter in '%s'\n", |
5607 | stp); | |
5608 | stp = strchr(stp, ','); | |
5609 | if (stp) | |
5610 | stp++; | |
5611 | } | |
5612 | } | |
5613 | ||
5614 | return 1; | |
5615 | } | |
5616 | ||
5617 | __setup("osst=", osst_setup); | |
5618 | ||
5619 | #endif | |
5620 | ||
00977a59 | 5621 | static const struct file_operations osst_fops = { |
1da177e4 LT |
5622 | .owner = THIS_MODULE, |
5623 | .read = osst_read, | |
5624 | .write = osst_write, | |
f4927c45 | 5625 | .unlocked_ioctl = osst_ioctl, |
1da177e4 LT |
5626 | #ifdef CONFIG_COMPAT |
5627 | .compat_ioctl = osst_compat_ioctl, | |
5628 | #endif | |
5629 | .open = os_scsi_tape_open, | |
5630 | .flush = os_scsi_tape_flush, | |
5631 | .release = os_scsi_tape_close, | |
889e5fbb | 5632 | .llseek = noop_llseek, |
1da177e4 LT |
5633 | }; |
5634 | ||
5635 | static int osst_supports(struct scsi_device * SDp) | |
5636 | { | |
5637 | struct osst_support_data { | |
5638 | char *vendor; | |
5639 | char *model; | |
5640 | char *rev; | |
5641 | char *driver_hint; /* Name of the correct driver, NULL if unknown */ | |
5642 | }; | |
5643 | ||
5644 | static struct osst_support_data support_list[] = { | |
5645 | /* {"XXX", "Yy-", "", NULL}, example */ | |
5646 | SIGS_FROM_OSST, | |
5647 | {NULL, }}; | |
5648 | ||
5649 | struct osst_support_data *rp; | |
5650 | ||
5651 | /* We are willing to drive OnStream SC-x0 as well as the | |
5652 | * * IDE, ParPort, FireWire, USB variants, if accessible by | |
5653 | * * emulation layer (ide-scsi, usb-storage, ...) */ | |
5654 | ||
5655 | for (rp=&(support_list[0]); rp->vendor != NULL; rp++) | |
5656 | if (!strncmp(rp->vendor, SDp->vendor, strlen(rp->vendor)) && | |
5657 | !strncmp(rp->model, SDp->model, strlen(rp->model)) && | |
5658 | !strncmp(rp->rev, SDp->rev, strlen(rp->rev))) | |
5659 | return 1; | |
5660 | return 0; | |
5661 | } | |
5662 | ||
5663 | /* | |
5664 | * sysfs support for osst driver parameter information | |
5665 | */ | |
5666 | ||
5667 | static ssize_t osst_version_show(struct device_driver *ddd, char *buf) | |
5668 | { | |
5669 | return snprintf(buf, PAGE_SIZE, "%s\n", osst_version); | |
5670 | } | |
5671 | ||
5672 | static DRIVER_ATTR(version, S_IRUGO, osst_version_show, NULL); | |
5673 | ||
405ae7d3 | 5674 | static int osst_create_sysfs_files(struct device_driver *sysfs) |
1da177e4 | 5675 | { |
405ae7d3 | 5676 | return driver_create_file(sysfs, &driver_attr_version); |
1da177e4 LT |
5677 | } |
5678 | ||
405ae7d3 | 5679 | static void osst_remove_sysfs_files(struct device_driver *sysfs) |
1da177e4 | 5680 | { |
405ae7d3 | 5681 | driver_remove_file(sysfs, &driver_attr_version); |
1da177e4 LT |
5682 | } |
5683 | ||
5684 | /* | |
5685 | * sysfs support for accessing ADR header information | |
5686 | */ | |
5687 | ||
ee959b00 TJ |
5688 | static ssize_t osst_adr_rev_show(struct device *dev, |
5689 | struct device_attribute *attr, char *buf) | |
1da177e4 | 5690 | { |
ee959b00 | 5691 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
1da177e4 LT |
5692 | ssize_t l = 0; |
5693 | ||
5694 | if (STp && STp->header_ok && STp->linux_media) | |
5695 | l = snprintf(buf, PAGE_SIZE, "%d.%d\n", STp->header_cache->major_rev, STp->header_cache->minor_rev); | |
5696 | return l; | |
5697 | } | |
5698 | ||
ee959b00 | 5699 | DEVICE_ATTR(ADR_rev, S_IRUGO, osst_adr_rev_show, NULL); |
1da177e4 | 5700 | |
ee959b00 TJ |
5701 | static ssize_t osst_linux_media_version_show(struct device *dev, |
5702 | struct device_attribute *attr, | |
5703 | char *buf) | |
1da177e4 | 5704 | { |
ee959b00 | 5705 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
1da177e4 LT |
5706 | ssize_t l = 0; |
5707 | ||
5708 | if (STp && STp->header_ok && STp->linux_media) | |
5709 | l = snprintf(buf, PAGE_SIZE, "LIN%d\n", STp->linux_media_version); | |
5710 | return l; | |
5711 | } | |
5712 | ||
ee959b00 | 5713 | DEVICE_ATTR(media_version, S_IRUGO, osst_linux_media_version_show, NULL); |
1da177e4 | 5714 | |
ee959b00 TJ |
5715 | static ssize_t osst_capacity_show(struct device *dev, |
5716 | struct device_attribute *attr, char *buf) | |
1da177e4 | 5717 | { |
ee959b00 | 5718 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
1da177e4 LT |
5719 | ssize_t l = 0; |
5720 | ||
5721 | if (STp && STp->header_ok && STp->linux_media) | |
5722 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->capacity); | |
5723 | return l; | |
5724 | } | |
5725 | ||
ee959b00 | 5726 | DEVICE_ATTR(capacity, S_IRUGO, osst_capacity_show, NULL); |
1da177e4 | 5727 | |
ee959b00 TJ |
5728 | static ssize_t osst_first_data_ppos_show(struct device *dev, |
5729 | struct device_attribute *attr, | |
5730 | char *buf) | |
1da177e4 | 5731 | { |
ee959b00 | 5732 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
1da177e4 LT |
5733 | ssize_t l = 0; |
5734 | ||
5735 | if (STp && STp->header_ok && STp->linux_media) | |
5736 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->first_data_ppos); | |
5737 | return l; | |
5738 | } | |
5739 | ||
ee959b00 | 5740 | DEVICE_ATTR(BOT_frame, S_IRUGO, osst_first_data_ppos_show, NULL); |
1da177e4 | 5741 | |
ee959b00 TJ |
5742 | static ssize_t osst_eod_frame_ppos_show(struct device *dev, |
5743 | struct device_attribute *attr, | |
5744 | char *buf) | |
1da177e4 | 5745 | { |
ee959b00 | 5746 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
1da177e4 LT |
5747 | ssize_t l = 0; |
5748 | ||
5749 | if (STp && STp->header_ok && STp->linux_media) | |
5750 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->eod_frame_ppos); | |
5751 | return l; | |
5752 | } | |
5753 | ||
ee959b00 | 5754 | DEVICE_ATTR(EOD_frame, S_IRUGO, osst_eod_frame_ppos_show, NULL); |
1da177e4 | 5755 | |
ee959b00 TJ |
5756 | static ssize_t osst_filemark_cnt_show(struct device *dev, |
5757 | struct device_attribute *attr, char *buf) | |
1da177e4 | 5758 | { |
ee959b00 | 5759 | struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev); |
1da177e4 LT |
5760 | ssize_t l = 0; |
5761 | ||
5762 | if (STp && STp->header_ok && STp->linux_media) | |
5763 | l = snprintf(buf, PAGE_SIZE, "%d\n", STp->filemark_cnt); | |
5764 | return l; | |
5765 | } | |
5766 | ||
ee959b00 | 5767 | DEVICE_ATTR(file_count, S_IRUGO, osst_filemark_cnt_show, NULL); |
1da177e4 | 5768 | |
d253878b | 5769 | static struct class *osst_sysfs_class; |
1da177e4 | 5770 | |
37e0333c | 5771 | static int osst_sysfs_init(void) |
1da177e4 | 5772 | { |
d253878b | 5773 | osst_sysfs_class = class_create(THIS_MODULE, "onstream_tape"); |
37e0333c JG |
5774 | if (IS_ERR(osst_sysfs_class)) { |
5775 | printk(KERN_ERR "osst :W: Unable to register sysfs class\n"); | |
5776 | return PTR_ERR(osst_sysfs_class); | |
5777 | } | |
5778 | ||
5779 | return 0; | |
1da177e4 LT |
5780 | } |
5781 | ||
37e0333c | 5782 | static void osst_sysfs_destroy(dev_t dev) |
1da177e4 | 5783 | { |
ee959b00 | 5784 | device_destroy(osst_sysfs_class, dev); |
37e0333c | 5785 | } |
1da177e4 | 5786 | |
37e0333c JG |
5787 | static int osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * STp, char * name) |
5788 | { | |
ee959b00 | 5789 | struct device *osst_member; |
37e0333c | 5790 | int err; |
1da177e4 | 5791 | |
d73a1a67 GKH |
5792 | osst_member = device_create(osst_sysfs_class, device, dev, STp, |
5793 | "%s", name); | |
ee959b00 | 5794 | if (IS_ERR(osst_member)) { |
1da177e4 | 5795 | printk(KERN_WARNING "osst :W: Unable to add sysfs class member %s\n", name); |
ee959b00 | 5796 | return PTR_ERR(osst_member); |
1da177e4 | 5797 | } |
37e0333c | 5798 | |
ee959b00 | 5799 | err = device_create_file(osst_member, &dev_attr_ADR_rev); |
37e0333c JG |
5800 | if (err) |
5801 | goto err_out; | |
ee959b00 | 5802 | err = device_create_file(osst_member, &dev_attr_media_version); |
37e0333c JG |
5803 | if (err) |
5804 | goto err_out; | |
ee959b00 | 5805 | err = device_create_file(osst_member, &dev_attr_capacity); |
37e0333c JG |
5806 | if (err) |
5807 | goto err_out; | |
ee959b00 | 5808 | err = device_create_file(osst_member, &dev_attr_BOT_frame); |
37e0333c JG |
5809 | if (err) |
5810 | goto err_out; | |
ee959b00 | 5811 | err = device_create_file(osst_member, &dev_attr_EOD_frame); |
37e0333c JG |
5812 | if (err) |
5813 | goto err_out; | |
ee959b00 | 5814 | err = device_create_file(osst_member, &dev_attr_file_count); |
37e0333c JG |
5815 | if (err) |
5816 | goto err_out; | |
1da177e4 | 5817 | |
37e0333c | 5818 | return 0; |
1da177e4 | 5819 | |
37e0333c JG |
5820 | err_out: |
5821 | osst_sysfs_destroy(dev); | |
5822 | return err; | |
1da177e4 LT |
5823 | } |
5824 | ||
5825 | static void osst_sysfs_cleanup(void) | |
5826 | { | |
37e0333c | 5827 | class_destroy(osst_sysfs_class); |
1da177e4 LT |
5828 | } |
5829 | ||
5830 | /* | |
5831 | * osst startup / cleanup code | |
5832 | */ | |
5833 | ||
5834 | static int osst_probe(struct device *dev) | |
5835 | { | |
5836 | struct scsi_device * SDp = to_scsi_device(dev); | |
5837 | struct osst_tape * tpnt; | |
5838 | struct st_modedef * STm; | |
5839 | struct st_partstat * STps; | |
5840 | struct osst_buffer * buffer; | |
5841 | struct gendisk * drive; | |
37e0333c | 5842 | int i, dev_num, err = -ENODEV; |
1da177e4 LT |
5843 | |
5844 | if (SDp->type != TYPE_TAPE || !osst_supports(SDp)) | |
5845 | return -ENODEV; | |
5846 | ||
5847 | drive = alloc_disk(1); | |
5848 | if (!drive) { | |
5849 | printk(KERN_ERR "osst :E: Out of memory. Device not attached.\n"); | |
5850 | return -ENODEV; | |
5851 | } | |
5852 | ||
5853 | /* if this is the first attach, build the infrastructure */ | |
5854 | write_lock(&os_scsi_tapes_lock); | |
5855 | if (os_scsi_tapes == NULL) { | |
2099973a | 5856 | os_scsi_tapes = kmalloc(osst_max_dev * sizeof(struct osst_tape *), GFP_ATOMIC); |
1da177e4 LT |
5857 | if (os_scsi_tapes == NULL) { |
5858 | write_unlock(&os_scsi_tapes_lock); | |
5859 | printk(KERN_ERR "osst :E: Unable to allocate array for OnStream SCSI tapes.\n"); | |
5860 | goto out_put_disk; | |
5861 | } | |
5862 | for (i=0; i < osst_max_dev; ++i) os_scsi_tapes[i] = NULL; | |
5863 | } | |
5864 | ||
5865 | if (osst_nr_dev >= osst_max_dev) { | |
5866 | write_unlock(&os_scsi_tapes_lock); | |
5867 | printk(KERN_ERR "osst :E: Too many tape devices (max. %d).\n", osst_max_dev); | |
5868 | goto out_put_disk; | |
5869 | } | |
5870 | ||
5871 | /* find a free minor number */ | |
ef3f7cc4 RK |
5872 | for (i = 0; i < osst_max_dev && os_scsi_tapes[i]; i++) |
5873 | ; | |
1da177e4 LT |
5874 | if(i >= osst_max_dev) panic ("Scsi_devices corrupt (osst)"); |
5875 | dev_num = i; | |
5876 | ||
5877 | /* allocate a struct osst_tape for this device */ | |
bbfbbbc1 MK |
5878 | tpnt = kzalloc(sizeof(struct osst_tape), GFP_ATOMIC); |
5879 | if (!tpnt) { | |
1da177e4 LT |
5880 | write_unlock(&os_scsi_tapes_lock); |
5881 | printk(KERN_ERR "osst :E: Can't allocate device descriptor, device not attached.\n"); | |
5882 | goto out_put_disk; | |
5883 | } | |
1da177e4 LT |
5884 | |
5885 | /* allocate a buffer for this device */ | |
5886 | i = SDp->host->sg_tablesize; | |
5887 | if (osst_max_sg_segs < i) | |
5888 | i = osst_max_sg_segs; | |
5889 | buffer = new_tape_buffer(1, SDp->host->unchecked_isa_dma, i); | |
5890 | if (buffer == NULL) { | |
5891 | write_unlock(&os_scsi_tapes_lock); | |
5892 | printk(KERN_ERR "osst :E: Unable to allocate a tape buffer, device not attached.\n"); | |
5893 | kfree(tpnt); | |
5894 | goto out_put_disk; | |
5895 | } | |
5896 | os_scsi_tapes[dev_num] = tpnt; | |
5897 | tpnt->buffer = buffer; | |
5898 | tpnt->device = SDp; | |
5899 | drive->private_data = &tpnt->driver; | |
5900 | sprintf(drive->disk_name, "osst%d", dev_num); | |
5901 | tpnt->driver = &osst_template; | |
5902 | tpnt->drive = drive; | |
5903 | tpnt->in_use = 0; | |
5904 | tpnt->capacity = 0xfffff; | |
5905 | tpnt->dirty = 0; | |
5906 | tpnt->drv_buffer = 1; /* Try buffering if no mode sense */ | |
5907 | tpnt->restr_dma = (SDp->host)->unchecked_isa_dma; | |
5908 | tpnt->density = 0; | |
5909 | tpnt->do_auto_lock = OSST_AUTO_LOCK; | |
5910 | tpnt->can_bsr = OSST_IN_FILE_POS; | |
5911 | tpnt->can_partitions = 0; | |
5912 | tpnt->two_fm = OSST_TWO_FM; | |
5913 | tpnt->fast_mteom = OSST_FAST_MTEOM; | |
5914 | tpnt->scsi2_logical = OSST_SCSI2LOGICAL; /* FIXME */ | |
5915 | tpnt->write_threshold = osst_write_threshold; | |
5916 | tpnt->default_drvbuffer = 0xff; /* No forced buffering */ | |
5917 | tpnt->partition = 0; | |
5918 | tpnt->new_partition = 0; | |
5919 | tpnt->nbr_partitions = 0; | |
5920 | tpnt->min_block = 512; | |
5921 | tpnt->max_block = OS_DATA_SIZE; | |
5922 | tpnt->timeout = OSST_TIMEOUT; | |
5923 | tpnt->long_timeout = OSST_LONG_TIMEOUT; | |
5924 | ||
5925 | /* Recognize OnStream tapes */ | |
5926 | /* We don't need to test for OnStream, as this has been done in detect () */ | |
5927 | tpnt->os_fw_rev = osst_parse_firmware_rev (SDp->rev); | |
5928 | tpnt->omit_blklims = 1; | |
5929 | ||
5930 | tpnt->poll = (strncmp(SDp->model, "DI-", 3) == 0) || | |
5931 | (strncmp(SDp->model, "FW-", 3) == 0) || OSST_FW_NEED_POLL(tpnt->os_fw_rev,SDp); | |
5932 | tpnt->frame_in_buffer = 0; | |
5933 | tpnt->header_ok = 0; | |
5934 | tpnt->linux_media = 0; | |
5935 | tpnt->header_cache = NULL; | |
5936 | ||
5937 | for (i=0; i < ST_NBR_MODES; i++) { | |
5938 | STm = &(tpnt->modes[i]); | |
5939 | STm->defined = 0; | |
5940 | STm->sysv = OSST_SYSV; | |
5941 | STm->defaults_for_writes = 0; | |
5942 | STm->do_async_writes = OSST_ASYNC_WRITES; | |
5943 | STm->do_buffer_writes = OSST_BUFFER_WRITES; | |
5944 | STm->do_read_ahead = OSST_READ_AHEAD; | |
5945 | STm->default_compression = ST_DONT_TOUCH; | |
5946 | STm->default_blksize = 512; | |
5947 | STm->default_density = (-1); /* No forced density */ | |
5948 | } | |
5949 | ||
5950 | for (i=0; i < ST_NBR_PARTITIONS; i++) { | |
5951 | STps = &(tpnt->ps[i]); | |
5952 | STps->rw = ST_IDLE; | |
5953 | STps->eof = ST_NOEOF; | |
5954 | STps->at_sm = 0; | |
5955 | STps->last_block_valid = 0; | |
5956 | STps->drv_block = (-1); | |
5957 | STps->drv_file = (-1); | |
5958 | } | |
5959 | ||
5960 | tpnt->current_mode = 0; | |
5961 | tpnt->modes[0].defined = 1; | |
5962 | tpnt->modes[2].defined = 1; | |
5963 | tpnt->density_changed = tpnt->compression_changed = tpnt->blksize_changed = 0; | |
5964 | ||
4390e601 | 5965 | mutex_init(&tpnt->lock); |
1da177e4 LT |
5966 | osst_nr_dev++; |
5967 | write_unlock(&os_scsi_tapes_lock); | |
37e0333c | 5968 | |
1da177e4 LT |
5969 | { |
5970 | char name[8]; | |
37e0333c | 5971 | |
1da177e4 | 5972 | /* Rewind entry */ |
37e0333c JG |
5973 | err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num), dev, tpnt, tape_name(tpnt)); |
5974 | if (err) | |
5975 | goto out_free_buffer; | |
5976 | ||
1da177e4 LT |
5977 | /* No-rewind entry */ |
5978 | snprintf(name, 8, "%s%s", "n", tape_name(tpnt)); | |
37e0333c JG |
5979 | err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num + 128), dev, tpnt, name); |
5980 | if (err) | |
5981 | goto out_free_sysfs1; | |
1da177e4 | 5982 | } |
1da177e4 | 5983 | |
80e23bab | 5984 | sdev_printk(KERN_INFO, SDp, |
9ccfc756 JB |
5985 | "osst :I: Attached OnStream %.5s tape as %s\n", |
5986 | SDp->model, tape_name(tpnt)); | |
1da177e4 LT |
5987 | |
5988 | return 0; | |
5989 | ||
37e0333c JG |
5990 | out_free_sysfs1: |
5991 | osst_sysfs_destroy(MKDEV(OSST_MAJOR, dev_num)); | |
5992 | out_free_buffer: | |
5993 | kfree(buffer); | |
1da177e4 LT |
5994 | out_put_disk: |
5995 | put_disk(drive); | |
37e0333c | 5996 | return err; |
1da177e4 LT |
5997 | }; |
5998 | ||
5999 | static int osst_remove(struct device *dev) | |
6000 | { | |
6001 | struct scsi_device * SDp = to_scsi_device(dev); | |
6002 | struct osst_tape * tpnt; | |
5e3c34c1 | 6003 | int i; |
1da177e4 LT |
6004 | |
6005 | if ((SDp->type != TYPE_TAPE) || (osst_nr_dev <= 0)) | |
6006 | return 0; | |
6007 | ||
6008 | write_lock(&os_scsi_tapes_lock); | |
6009 | for(i=0; i < osst_max_dev; i++) { | |
6010 | if((tpnt = os_scsi_tapes[i]) && (tpnt->device == SDp)) { | |
6011 | osst_sysfs_destroy(MKDEV(OSST_MAJOR, i)); | |
6012 | osst_sysfs_destroy(MKDEV(OSST_MAJOR, i+128)); | |
6013 | tpnt->device = NULL; | |
1da177e4 LT |
6014 | put_disk(tpnt->drive); |
6015 | os_scsi_tapes[i] = NULL; | |
6016 | osst_nr_dev--; | |
6017 | write_unlock(&os_scsi_tapes_lock); | |
f9101210 | 6018 | vfree(tpnt->header_cache); |
1da177e4 LT |
6019 | if (tpnt->buffer) { |
6020 | normalize_buffer(tpnt->buffer); | |
6021 | kfree(tpnt->buffer); | |
6022 | } | |
6023 | kfree(tpnt); | |
6024 | return 0; | |
6025 | } | |
6026 | } | |
6027 | write_unlock(&os_scsi_tapes_lock); | |
6028 | return 0; | |
6029 | } | |
6030 | ||
6031 | static int __init init_osst(void) | |
6032 | { | |
37e0333c JG |
6033 | int err; |
6034 | ||
1da177e4 LT |
6035 | printk(KERN_INFO "osst :I: Tape driver with OnStream support version %s\nosst :I: %s\n", osst_version, cvsid); |
6036 | ||
6037 | validate_options(); | |
1da177e4 | 6038 | |
37e0333c JG |
6039 | err = osst_sysfs_init(); |
6040 | if (err) | |
6041 | return err; | |
6042 | ||
6043 | err = register_chrdev(OSST_MAJOR, "osst", &osst_fops); | |
6044 | if (err < 0) { | |
1da177e4 | 6045 | printk(KERN_ERR "osst :E: Unable to register major %d for OnStream tapes\n", OSST_MAJOR); |
37e0333c | 6046 | goto err_out; |
1da177e4 | 6047 | } |
37e0333c JG |
6048 | |
6049 | err = scsi_register_driver(&osst_template.gendrv); | |
6050 | if (err) | |
6051 | goto err_out_chrdev; | |
6052 | ||
405ae7d3 | 6053 | err = osst_create_sysfs_files(&osst_template.gendrv); |
37e0333c JG |
6054 | if (err) |
6055 | goto err_out_scsidrv; | |
1da177e4 LT |
6056 | |
6057 | return 0; | |
37e0333c JG |
6058 | |
6059 | err_out_scsidrv: | |
6060 | scsi_unregister_driver(&osst_template.gendrv); | |
6061 | err_out_chrdev: | |
6062 | unregister_chrdev(OSST_MAJOR, "osst"); | |
6063 | err_out: | |
6064 | osst_sysfs_cleanup(); | |
6065 | return err; | |
1da177e4 LT |
6066 | } |
6067 | ||
6068 | static void __exit exit_osst (void) | |
6069 | { | |
6070 | int i; | |
6071 | struct osst_tape * STp; | |
6072 | ||
405ae7d3 | 6073 | osst_remove_sysfs_files(&osst_template.gendrv); |
1da177e4 LT |
6074 | scsi_unregister_driver(&osst_template.gendrv); |
6075 | unregister_chrdev(OSST_MAJOR, "osst"); | |
6076 | osst_sysfs_cleanup(); | |
6077 | ||
6078 | if (os_scsi_tapes) { | |
6079 | for (i=0; i < osst_max_dev; ++i) { | |
6080 | if (!(STp = os_scsi_tapes[i])) continue; | |
6081 | /* This is defensive, supposed to happen during detach */ | |
f9101210 | 6082 | vfree(STp->header_cache); |
1da177e4 LT |
6083 | if (STp->buffer) { |
6084 | normalize_buffer(STp->buffer); | |
6085 | kfree(STp->buffer); | |
6086 | } | |
6087 | put_disk(STp->drive); | |
6088 | kfree(STp); | |
6089 | } | |
6090 | kfree(os_scsi_tapes); | |
6091 | } | |
6092 | printk(KERN_INFO "osst :I: Unloaded.\n"); | |
6093 | } | |
6094 | ||
6095 | module_init(init_osst); | |
6096 | module_exit(exit_osst); |