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f931551b RC |
1 | /* |
2 | * Copyright (c) 2006, 2007, 2008, 2009 QLogic Corporation. All rights reserved. | |
3 | * Copyright (c) 2006 PathScale, Inc. All rights reserved. | |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include <linux/module.h> | |
35 | #include <linux/fs.h> | |
36 | #include <linux/mount.h> | |
37 | #include <linux/pagemap.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/namei.h> | |
40 | ||
41 | #include "qib.h" | |
42 | ||
43 | #define QIBFS_MAGIC 0x726a77 | |
44 | ||
45 | static struct super_block *qib_super; | |
46 | ||
47 | #define private2dd(file) ((file)->f_dentry->d_inode->i_private) | |
48 | ||
49 | static int qibfs_mknod(struct inode *dir, struct dentry *dentry, | |
50 | int mode, const struct file_operations *fops, | |
51 | void *data) | |
52 | { | |
53 | int error; | |
54 | struct inode *inode = new_inode(dir->i_sb); | |
55 | ||
56 | if (!inode) { | |
57 | error = -EPERM; | |
58 | goto bail; | |
59 | } | |
60 | ||
85fe4025 | 61 | inode->i_ino = get_next_ino(); |
f931551b RC |
62 | inode->i_mode = mode; |
63 | inode->i_uid = 0; | |
64 | inode->i_gid = 0; | |
65 | inode->i_blocks = 0; | |
66 | inode->i_atime = CURRENT_TIME; | |
67 | inode->i_mtime = inode->i_atime; | |
68 | inode->i_ctime = inode->i_atime; | |
69 | inode->i_private = data; | |
70 | if ((mode & S_IFMT) == S_IFDIR) { | |
71 | inode->i_op = &simple_dir_inode_operations; | |
72 | inc_nlink(inode); | |
73 | inc_nlink(dir); | |
74 | } | |
75 | ||
76 | inode->i_fop = fops; | |
77 | ||
78 | d_instantiate(dentry, inode); | |
79 | error = 0; | |
80 | ||
81 | bail: | |
82 | return error; | |
83 | } | |
84 | ||
85 | static int create_file(const char *name, mode_t mode, | |
86 | struct dentry *parent, struct dentry **dentry, | |
87 | const struct file_operations *fops, void *data) | |
88 | { | |
89 | int error; | |
90 | ||
91 | *dentry = NULL; | |
92 | mutex_lock(&parent->d_inode->i_mutex); | |
93 | *dentry = lookup_one_len(name, parent, strlen(name)); | |
94 | if (!IS_ERR(*dentry)) | |
95 | error = qibfs_mknod(parent->d_inode, *dentry, | |
96 | mode, fops, data); | |
97 | else | |
98 | error = PTR_ERR(*dentry); | |
99 | mutex_unlock(&parent->d_inode->i_mutex); | |
100 | ||
101 | return error; | |
102 | } | |
103 | ||
104 | static ssize_t driver_stats_read(struct file *file, char __user *buf, | |
105 | size_t count, loff_t *ppos) | |
106 | { | |
107 | return simple_read_from_buffer(buf, count, ppos, &qib_stats, | |
108 | sizeof qib_stats); | |
109 | } | |
110 | ||
111 | /* | |
112 | * driver stats field names, one line per stat, single string. Used by | |
113 | * programs like ipathstats to print the stats in a way which works for | |
114 | * different versions of drivers, without changing program source. | |
115 | * if qlogic_ib_stats changes, this needs to change. Names need to be | |
116 | * 12 chars or less (w/o newline), for proper display by ipathstats utility. | |
117 | */ | |
118 | static const char qib_statnames[] = | |
119 | "KernIntr\n" | |
120 | "ErrorIntr\n" | |
121 | "Tx_Errs\n" | |
122 | "Rcv_Errs\n" | |
123 | "H/W_Errs\n" | |
124 | "NoPIOBufs\n" | |
125 | "CtxtsOpen\n" | |
126 | "RcvLen_Errs\n" | |
127 | "EgrBufFull\n" | |
128 | "EgrHdrFull\n" | |
129 | ; | |
130 | ||
131 | static ssize_t driver_names_read(struct file *file, char __user *buf, | |
132 | size_t count, loff_t *ppos) | |
133 | { | |
134 | return simple_read_from_buffer(buf, count, ppos, qib_statnames, | |
135 | sizeof qib_statnames - 1); /* no null */ | |
136 | } | |
137 | ||
138 | static const struct file_operations driver_ops[] = { | |
dd378c21 AB |
139 | { .read = driver_stats_read, .llseek = generic_file_llseek, }, |
140 | { .read = driver_names_read, .llseek = generic_file_llseek, }, | |
f931551b RC |
141 | }; |
142 | ||
143 | /* read the per-device counters */ | |
144 | static ssize_t dev_counters_read(struct file *file, char __user *buf, | |
145 | size_t count, loff_t *ppos) | |
146 | { | |
147 | u64 *counters; | |
f27ec1d6 | 148 | size_t avail; |
f931551b RC |
149 | struct qib_devdata *dd = private2dd(file); |
150 | ||
f27ec1d6 RD |
151 | avail = dd->f_read_cntrs(dd, *ppos, NULL, &counters); |
152 | return simple_read_from_buffer(buf, count, ppos, counters, avail); | |
f931551b RC |
153 | } |
154 | ||
155 | /* read the per-device counters */ | |
156 | static ssize_t dev_names_read(struct file *file, char __user *buf, | |
157 | size_t count, loff_t *ppos) | |
158 | { | |
159 | char *names; | |
f27ec1d6 | 160 | size_t avail; |
f931551b RC |
161 | struct qib_devdata *dd = private2dd(file); |
162 | ||
f27ec1d6 RD |
163 | avail = dd->f_read_cntrs(dd, *ppos, &names, NULL); |
164 | return simple_read_from_buffer(buf, count, ppos, names, avail); | |
f931551b RC |
165 | } |
166 | ||
167 | static const struct file_operations cntr_ops[] = { | |
dd378c21 AB |
168 | { .read = dev_counters_read, .llseek = generic_file_llseek, }, |
169 | { .read = dev_names_read, .llseek = generic_file_llseek, }, | |
f931551b RC |
170 | }; |
171 | ||
172 | /* | |
173 | * Could use file->f_dentry->d_inode->i_ino to figure out which file, | |
174 | * instead of separate routine for each, but for now, this works... | |
175 | */ | |
176 | ||
177 | /* read the per-port names (same for each port) */ | |
178 | static ssize_t portnames_read(struct file *file, char __user *buf, | |
179 | size_t count, loff_t *ppos) | |
180 | { | |
181 | char *names; | |
f27ec1d6 | 182 | size_t avail; |
f931551b RC |
183 | struct qib_devdata *dd = private2dd(file); |
184 | ||
f27ec1d6 RD |
185 | avail = dd->f_read_portcntrs(dd, *ppos, 0, &names, NULL); |
186 | return simple_read_from_buffer(buf, count, ppos, names, avail); | |
f931551b RC |
187 | } |
188 | ||
189 | /* read the per-port counters for port 1 (pidx 0) */ | |
190 | static ssize_t portcntrs_1_read(struct file *file, char __user *buf, | |
191 | size_t count, loff_t *ppos) | |
192 | { | |
193 | u64 *counters; | |
f27ec1d6 | 194 | size_t avail; |
f931551b RC |
195 | struct qib_devdata *dd = private2dd(file); |
196 | ||
f27ec1d6 RD |
197 | avail = dd->f_read_portcntrs(dd, *ppos, 0, NULL, &counters); |
198 | return simple_read_from_buffer(buf, count, ppos, counters, avail); | |
f931551b RC |
199 | } |
200 | ||
201 | /* read the per-port counters for port 2 (pidx 1) */ | |
202 | static ssize_t portcntrs_2_read(struct file *file, char __user *buf, | |
203 | size_t count, loff_t *ppos) | |
204 | { | |
205 | u64 *counters; | |
f27ec1d6 | 206 | size_t avail; |
f931551b RC |
207 | struct qib_devdata *dd = private2dd(file); |
208 | ||
f27ec1d6 RD |
209 | avail = dd->f_read_portcntrs(dd, *ppos, 1, NULL, &counters); |
210 | return simple_read_from_buffer(buf, count, ppos, counters, avail); | |
f931551b RC |
211 | } |
212 | ||
213 | static const struct file_operations portcntr_ops[] = { | |
dd378c21 AB |
214 | { .read = portnames_read, .llseek = generic_file_llseek, }, |
215 | { .read = portcntrs_1_read, .llseek = generic_file_llseek, }, | |
216 | { .read = portcntrs_2_read, .llseek = generic_file_llseek, }, | |
f931551b RC |
217 | }; |
218 | ||
219 | /* | |
220 | * read the per-port QSFP data for port 1 (pidx 0) | |
221 | */ | |
222 | static ssize_t qsfp_1_read(struct file *file, char __user *buf, | |
223 | size_t count, loff_t *ppos) | |
224 | { | |
225 | struct qib_devdata *dd = private2dd(file); | |
226 | char *tmp; | |
227 | int ret; | |
228 | ||
229 | tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
230 | if (!tmp) | |
231 | return -ENOMEM; | |
232 | ||
233 | ret = qib_qsfp_dump(dd->pport, tmp, PAGE_SIZE); | |
234 | if (ret > 0) | |
235 | ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); | |
236 | kfree(tmp); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | /* | |
241 | * read the per-port QSFP data for port 2 (pidx 1) | |
242 | */ | |
243 | static ssize_t qsfp_2_read(struct file *file, char __user *buf, | |
244 | size_t count, loff_t *ppos) | |
245 | { | |
246 | struct qib_devdata *dd = private2dd(file); | |
247 | char *tmp; | |
248 | int ret; | |
249 | ||
250 | if (dd->num_pports < 2) | |
251 | return -ENODEV; | |
252 | ||
253 | tmp = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
254 | if (!tmp) | |
255 | return -ENOMEM; | |
256 | ||
257 | ret = qib_qsfp_dump(dd->pport + 1, tmp, PAGE_SIZE); | |
258 | if (ret > 0) | |
259 | ret = simple_read_from_buffer(buf, count, ppos, tmp, ret); | |
260 | kfree(tmp); | |
261 | return ret; | |
262 | } | |
263 | ||
264 | static const struct file_operations qsfp_ops[] = { | |
dd378c21 AB |
265 | { .read = qsfp_1_read, .llseek = generic_file_llseek, }, |
266 | { .read = qsfp_2_read, .llseek = generic_file_llseek, }, | |
f931551b RC |
267 | }; |
268 | ||
269 | static ssize_t flash_read(struct file *file, char __user *buf, | |
270 | size_t count, loff_t *ppos) | |
271 | { | |
272 | struct qib_devdata *dd; | |
273 | ssize_t ret; | |
274 | loff_t pos; | |
275 | char *tmp; | |
276 | ||
277 | pos = *ppos; | |
278 | ||
279 | if (pos < 0) { | |
280 | ret = -EINVAL; | |
281 | goto bail; | |
282 | } | |
283 | ||
284 | if (pos >= sizeof(struct qib_flash)) { | |
285 | ret = 0; | |
286 | goto bail; | |
287 | } | |
288 | ||
289 | if (count > sizeof(struct qib_flash) - pos) | |
290 | count = sizeof(struct qib_flash) - pos; | |
291 | ||
292 | tmp = kmalloc(count, GFP_KERNEL); | |
293 | if (!tmp) { | |
294 | ret = -ENOMEM; | |
295 | goto bail; | |
296 | } | |
297 | ||
298 | dd = private2dd(file); | |
299 | if (qib_eeprom_read(dd, pos, tmp, count)) { | |
300 | qib_dev_err(dd, "failed to read from flash\n"); | |
301 | ret = -ENXIO; | |
302 | goto bail_tmp; | |
303 | } | |
304 | ||
305 | if (copy_to_user(buf, tmp, count)) { | |
306 | ret = -EFAULT; | |
307 | goto bail_tmp; | |
308 | } | |
309 | ||
310 | *ppos = pos + count; | |
311 | ret = count; | |
312 | ||
313 | bail_tmp: | |
314 | kfree(tmp); | |
315 | ||
316 | bail: | |
317 | return ret; | |
318 | } | |
319 | ||
320 | static ssize_t flash_write(struct file *file, const char __user *buf, | |
321 | size_t count, loff_t *ppos) | |
322 | { | |
323 | struct qib_devdata *dd; | |
324 | ssize_t ret; | |
325 | loff_t pos; | |
326 | char *tmp; | |
327 | ||
328 | pos = *ppos; | |
329 | ||
330 | if (pos != 0) { | |
331 | ret = -EINVAL; | |
332 | goto bail; | |
333 | } | |
334 | ||
335 | if (count != sizeof(struct qib_flash)) { | |
336 | ret = -EINVAL; | |
337 | goto bail; | |
338 | } | |
339 | ||
340 | tmp = kmalloc(count, GFP_KERNEL); | |
341 | if (!tmp) { | |
342 | ret = -ENOMEM; | |
343 | goto bail; | |
344 | } | |
345 | ||
346 | if (copy_from_user(tmp, buf, count)) { | |
347 | ret = -EFAULT; | |
348 | goto bail_tmp; | |
349 | } | |
350 | ||
351 | dd = private2dd(file); | |
352 | if (qib_eeprom_write(dd, pos, tmp, count)) { | |
353 | ret = -ENXIO; | |
354 | qib_dev_err(dd, "failed to write to flash\n"); | |
355 | goto bail_tmp; | |
356 | } | |
357 | ||
358 | *ppos = pos + count; | |
359 | ret = count; | |
360 | ||
361 | bail_tmp: | |
362 | kfree(tmp); | |
363 | ||
364 | bail: | |
365 | return ret; | |
366 | } | |
367 | ||
368 | static const struct file_operations flash_ops = { | |
369 | .read = flash_read, | |
370 | .write = flash_write, | |
6038f373 | 371 | .llseek = default_llseek, |
f931551b RC |
372 | }; |
373 | ||
374 | static int add_cntr_files(struct super_block *sb, struct qib_devdata *dd) | |
375 | { | |
376 | struct dentry *dir, *tmp; | |
377 | char unit[10]; | |
378 | int ret, i; | |
379 | ||
380 | /* create the per-unit directory */ | |
381 | snprintf(unit, sizeof unit, "%u", dd->unit); | |
382 | ret = create_file(unit, S_IFDIR|S_IRUGO|S_IXUGO, sb->s_root, &dir, | |
383 | &simple_dir_operations, dd); | |
384 | if (ret) { | |
385 | printk(KERN_ERR "create_file(%s) failed: %d\n", unit, ret); | |
386 | goto bail; | |
387 | } | |
388 | ||
389 | /* create the files in the new directory */ | |
390 | ret = create_file("counters", S_IFREG|S_IRUGO, dir, &tmp, | |
391 | &cntr_ops[0], dd); | |
392 | if (ret) { | |
393 | printk(KERN_ERR "create_file(%s/counters) failed: %d\n", | |
394 | unit, ret); | |
395 | goto bail; | |
396 | } | |
397 | ret = create_file("counter_names", S_IFREG|S_IRUGO, dir, &tmp, | |
398 | &cntr_ops[1], dd); | |
399 | if (ret) { | |
400 | printk(KERN_ERR "create_file(%s/counter_names) failed: %d\n", | |
401 | unit, ret); | |
402 | goto bail; | |
403 | } | |
404 | ret = create_file("portcounter_names", S_IFREG|S_IRUGO, dir, &tmp, | |
405 | &portcntr_ops[0], dd); | |
406 | if (ret) { | |
407 | printk(KERN_ERR "create_file(%s/%s) failed: %d\n", | |
408 | unit, "portcounter_names", ret); | |
409 | goto bail; | |
410 | } | |
411 | for (i = 1; i <= dd->num_pports; i++) { | |
412 | char fname[24]; | |
413 | ||
414 | sprintf(fname, "port%dcounters", i); | |
415 | /* create the files in the new directory */ | |
416 | ret = create_file(fname, S_IFREG|S_IRUGO, dir, &tmp, | |
417 | &portcntr_ops[i], dd); | |
418 | if (ret) { | |
419 | printk(KERN_ERR "create_file(%s/%s) failed: %d\n", | |
420 | unit, fname, ret); | |
421 | goto bail; | |
422 | } | |
423 | if (!(dd->flags & QIB_HAS_QSFP)) | |
424 | continue; | |
425 | sprintf(fname, "qsfp%d", i); | |
426 | ret = create_file(fname, S_IFREG|S_IRUGO, dir, &tmp, | |
427 | &qsfp_ops[i - 1], dd); | |
428 | if (ret) { | |
429 | printk(KERN_ERR "create_file(%s/%s) failed: %d\n", | |
430 | unit, fname, ret); | |
431 | goto bail; | |
432 | } | |
433 | } | |
434 | ||
435 | ret = create_file("flash", S_IFREG|S_IWUSR|S_IRUGO, dir, &tmp, | |
436 | &flash_ops, dd); | |
437 | if (ret) | |
438 | printk(KERN_ERR "create_file(%s/flash) failed: %d\n", | |
439 | unit, ret); | |
440 | bail: | |
441 | return ret; | |
442 | } | |
443 | ||
444 | static int remove_file(struct dentry *parent, char *name) | |
445 | { | |
446 | struct dentry *tmp; | |
447 | int ret; | |
448 | ||
449 | tmp = lookup_one_len(name, parent, strlen(name)); | |
450 | ||
451 | if (IS_ERR(tmp)) { | |
452 | ret = PTR_ERR(tmp); | |
453 | goto bail; | |
454 | } | |
455 | ||
f931551b RC |
456 | spin_lock(&tmp->d_lock); |
457 | if (!(d_unhashed(tmp) && tmp->d_inode)) { | |
dc0474be | 458 | dget_dlock(tmp); |
f931551b RC |
459 | __d_drop(tmp); |
460 | spin_unlock(&tmp->d_lock); | |
f931551b RC |
461 | simple_unlink(parent->d_inode, tmp); |
462 | } else { | |
463 | spin_unlock(&tmp->d_lock); | |
f931551b RC |
464 | } |
465 | ||
466 | ret = 0; | |
467 | bail: | |
468 | /* | |
469 | * We don't expect clients to care about the return value, but | |
470 | * it's there if they need it. | |
471 | */ | |
472 | return ret; | |
473 | } | |
474 | ||
475 | static int remove_device_files(struct super_block *sb, | |
476 | struct qib_devdata *dd) | |
477 | { | |
478 | struct dentry *dir, *root; | |
479 | char unit[10]; | |
480 | int ret, i; | |
481 | ||
482 | root = dget(sb->s_root); | |
483 | mutex_lock(&root->d_inode->i_mutex); | |
484 | snprintf(unit, sizeof unit, "%u", dd->unit); | |
485 | dir = lookup_one_len(unit, root, strlen(unit)); | |
486 | ||
487 | if (IS_ERR(dir)) { | |
488 | ret = PTR_ERR(dir); | |
489 | printk(KERN_ERR "Lookup of %s failed\n", unit); | |
490 | goto bail; | |
491 | } | |
492 | ||
493 | remove_file(dir, "counters"); | |
494 | remove_file(dir, "counter_names"); | |
495 | remove_file(dir, "portcounter_names"); | |
496 | for (i = 0; i < dd->num_pports; i++) { | |
497 | char fname[24]; | |
498 | ||
499 | sprintf(fname, "port%dcounters", i + 1); | |
500 | remove_file(dir, fname); | |
501 | if (dd->flags & QIB_HAS_QSFP) { | |
502 | sprintf(fname, "qsfp%d", i + 1); | |
503 | remove_file(dir, fname); | |
504 | } | |
505 | } | |
506 | remove_file(dir, "flash"); | |
507 | d_delete(dir); | |
508 | ret = simple_rmdir(root->d_inode, dir); | |
509 | ||
510 | bail: | |
511 | mutex_unlock(&root->d_inode->i_mutex); | |
512 | dput(root); | |
513 | return ret; | |
514 | } | |
515 | ||
516 | /* | |
517 | * This fills everything in when the fs is mounted, to handle umount/mount | |
518 | * after device init. The direct add_cntr_files() call handles adding | |
519 | * them from the init code, when the fs is already mounted. | |
520 | */ | |
521 | static int qibfs_fill_super(struct super_block *sb, void *data, int silent) | |
522 | { | |
523 | struct qib_devdata *dd, *tmp; | |
524 | unsigned long flags; | |
525 | int ret; | |
526 | ||
527 | static struct tree_descr files[] = { | |
528 | [2] = {"driver_stats", &driver_ops[0], S_IRUGO}, | |
529 | [3] = {"driver_stats_names", &driver_ops[1], S_IRUGO}, | |
530 | {""}, | |
531 | }; | |
532 | ||
533 | ret = simple_fill_super(sb, QIBFS_MAGIC, files); | |
534 | if (ret) { | |
535 | printk(KERN_ERR "simple_fill_super failed: %d\n", ret); | |
536 | goto bail; | |
537 | } | |
538 | ||
539 | spin_lock_irqsave(&qib_devs_lock, flags); | |
540 | ||
541 | list_for_each_entry_safe(dd, tmp, &qib_dev_list, list) { | |
542 | spin_unlock_irqrestore(&qib_devs_lock, flags); | |
543 | ret = add_cntr_files(sb, dd); | |
971b2e8a | 544 | if (ret) |
f931551b | 545 | goto bail; |
f931551b RC |
546 | spin_lock_irqsave(&qib_devs_lock, flags); |
547 | } | |
548 | ||
549 | spin_unlock_irqrestore(&qib_devs_lock, flags); | |
550 | ||
551 | bail: | |
552 | return ret; | |
553 | } | |
554 | ||
fc14f2fe AV |
555 | static struct dentry *qibfs_mount(struct file_system_type *fs_type, int flags, |
556 | const char *dev_name, void *data) | |
f931551b | 557 | { |
fc14f2fe AV |
558 | struct dentry *ret; |
559 | ret = mount_single(fs_type, flags, data, qibfs_fill_super); | |
560 | if (!IS_ERR(ret)) | |
561 | qib_super = ret->d_sb; | |
f931551b RC |
562 | return ret; |
563 | } | |
564 | ||
565 | static void qibfs_kill_super(struct super_block *s) | |
566 | { | |
567 | kill_litter_super(s); | |
568 | qib_super = NULL; | |
569 | } | |
570 | ||
571 | int qibfs_add(struct qib_devdata *dd) | |
572 | { | |
573 | int ret; | |
574 | ||
575 | /* | |
576 | * On first unit initialized, qib_super will not yet exist | |
577 | * because nobody has yet tried to mount the filesystem, so | |
578 | * we can't consider that to be an error; if an error occurs | |
579 | * during the mount, that will get a complaint, so this is OK. | |
580 | * add_cntr_files() for all units is done at mount from | |
581 | * qibfs_fill_super(), so one way or another, everything works. | |
582 | */ | |
583 | if (qib_super == NULL) | |
584 | ret = 0; | |
585 | else | |
586 | ret = add_cntr_files(qib_super, dd); | |
587 | return ret; | |
588 | } | |
589 | ||
590 | int qibfs_remove(struct qib_devdata *dd) | |
591 | { | |
592 | int ret = 0; | |
593 | ||
594 | if (qib_super) | |
595 | ret = remove_device_files(qib_super, dd); | |
596 | ||
597 | return ret; | |
598 | } | |
599 | ||
600 | static struct file_system_type qibfs_fs_type = { | |
601 | .owner = THIS_MODULE, | |
602 | .name = "ipathfs", | |
fc14f2fe | 603 | .mount = qibfs_mount, |
f931551b RC |
604 | .kill_sb = qibfs_kill_super, |
605 | }; | |
606 | ||
607 | int __init qib_init_qibfs(void) | |
608 | { | |
609 | return register_filesystem(&qibfs_fs_type); | |
610 | } | |
611 | ||
612 | int __exit qib_exit_qibfs(void) | |
613 | { | |
614 | return unregister_filesystem(&qibfs_fs_type); | |
615 | } |