Commit | Line | Data |
---|---|---|
b14f8ab2 BH |
1 | /* |
2 | * Copyright (C) 2005, 2006 | |
27d2e149 | 3 | * Avishay Traeger (avishay@gmail.com) |
b14f8ab2 BH |
4 | * Copyright (C) 2008, 2009 |
5 | * Boaz Harrosh <bharrosh@panasas.com> | |
6 | * | |
7 | * This file is part of exofs. | |
8 | * | |
9 | * exofs is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation. Since it is based on ext2, and the only | |
12 | * valid version of GPL for the Linux kernel is version 2, the only valid | |
13 | * version of GPL for exofs is version 2. | |
14 | * | |
15 | * exofs is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with exofs; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | */ | |
24 | ||
5a0e3ad6 | 25 | #include <linux/slab.h> |
5d952b83 | 26 | #include <asm/div64.h> |
b14f8ab2 | 27 | |
8ff660ab | 28 | #include <scsi/osd_ore.h> |
b14f8ab2 | 29 | |
8ff660ab | 30 | #define ORE_ERR(fmt, a...) printk(KERN_ERR "ore: " fmt, ##a) |
34ce4e7c | 31 | |
8ff660ab BH |
32 | #ifdef CONFIG_EXOFS_DEBUG |
33 | #define ORE_DBGMSG(fmt, a...) \ | |
34 | printk(KERN_NOTICE "ore @%s:%d: " fmt, __func__, __LINE__, ##a) | |
35 | #else | |
36 | #define ORE_DBGMSG(fmt, a...) \ | |
37 | do { if (0) printk(fmt, ##a); } while (0) | |
38 | #endif | |
39 | ||
40 | /* u64 has problems with printk this will cast it to unsigned long long */ | |
41 | #define _LLU(x) (unsigned long long)(x) | |
42 | ||
43 | #define ORE_DBGMSG2(M...) do {} while (0) | |
44 | /* #define ORE_DBGMSG2 ORE_DBGMSG */ | |
45 | ||
cf283ade BH |
46 | MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>"); |
47 | MODULE_DESCRIPTION("Objects Raid Engine ore.ko"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
8ff660ab | 50 | static u8 *_ios_cred(struct ore_io_state *ios, unsigned index) |
9e9db456 BH |
51 | { |
52 | return ios->comps->comps[index & ios->comps->single_comp].cred; | |
53 | } | |
54 | ||
8ff660ab | 55 | static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index) |
9e9db456 BH |
56 | { |
57 | return &ios->comps->comps[index & ios->comps->single_comp].obj; | |
58 | } | |
59 | ||
8ff660ab | 60 | static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index) |
9e9db456 BH |
61 | { |
62 | return ios->comps->ods[index]; | |
63 | } | |
64 | ||
8ff660ab BH |
65 | int ore_get_rw_state(struct ore_layout *layout, struct ore_components *comps, |
66 | bool is_reading, u64 offset, u64 length, | |
67 | struct ore_io_state **pios) | |
b14f8ab2 | 68 | { |
8ff660ab | 69 | struct ore_io_state *ios; |
06886a5a BH |
70 | |
71 | /*TODO: Maybe use kmem_cach per sbi of size | |
45d3abcb | 72 | * exofs_io_state_size(layout->s_numdevs) |
06886a5a | 73 | */ |
8ff660ab | 74 | ios = kzalloc(ore_io_state_size(comps->numdevs), GFP_KERNEL); |
06886a5a | 75 | if (unlikely(!ios)) { |
8ff660ab BH |
76 | ORE_DBGMSG("Failed kzalloc bytes=%d\n", |
77 | ore_io_state_size(comps->numdevs)); | |
06886a5a BH |
78 | *pios = NULL; |
79 | return -ENOMEM; | |
80 | } | |
81 | ||
45d3abcb | 82 | ios->layout = layout; |
9e9db456 | 83 | ios->comps = comps; |
e1042ba0 BH |
84 | ios->offset = offset; |
85 | ios->length = length; | |
86 | ios->reading = is_reading; | |
87 | ||
06886a5a BH |
88 | *pios = ios; |
89 | return 0; | |
b14f8ab2 | 90 | } |
cf283ade | 91 | EXPORT_SYMBOL(ore_get_rw_state); |
b14f8ab2 | 92 | |
8ff660ab BH |
93 | int ore_get_io_state(struct ore_layout *layout, struct ore_components *comps, |
94 | struct ore_io_state **ios) | |
e1042ba0 | 95 | { |
8ff660ab | 96 | return ore_get_rw_state(layout, comps, true, 0, 0, ios); |
e1042ba0 | 97 | } |
cf283ade | 98 | EXPORT_SYMBOL(ore_get_io_state); |
e1042ba0 | 99 | |
8ff660ab | 100 | void ore_put_io_state(struct ore_io_state *ios) |
b14f8ab2 | 101 | { |
06886a5a BH |
102 | if (ios) { |
103 | unsigned i; | |
b14f8ab2 | 104 | |
06886a5a | 105 | for (i = 0; i < ios->numdevs; i++) { |
8ff660ab | 106 | struct ore_per_dev_state *per_dev = &ios->per_dev[i]; |
06886a5a BH |
107 | |
108 | if (per_dev->or) | |
109 | osd_end_request(per_dev->or); | |
110 | if (per_dev->bio) | |
111 | bio_put(per_dev->bio); | |
112 | } | |
113 | ||
114 | kfree(ios); | |
b14f8ab2 | 115 | } |
06886a5a | 116 | } |
cf283ade | 117 | EXPORT_SYMBOL(ore_put_io_state); |
b14f8ab2 | 118 | |
8ff660ab | 119 | static void _sync_done(struct ore_io_state *ios, void *p) |
06886a5a BH |
120 | { |
121 | struct completion *waiting = p; | |
b14f8ab2 | 122 | |
06886a5a BH |
123 | complete(waiting); |
124 | } | |
125 | ||
126 | static void _last_io(struct kref *kref) | |
127 | { | |
8ff660ab BH |
128 | struct ore_io_state *ios = container_of( |
129 | kref, struct ore_io_state, kref); | |
06886a5a BH |
130 | |
131 | ios->done(ios, ios->private); | |
132 | } | |
133 | ||
134 | static void _done_io(struct osd_request *or, void *p) | |
135 | { | |
8ff660ab | 136 | struct ore_io_state *ios = p; |
06886a5a BH |
137 | |
138 | kref_put(&ios->kref, _last_io); | |
139 | } | |
140 | ||
8ff660ab | 141 | static int ore_io_execute(struct ore_io_state *ios) |
06886a5a BH |
142 | { |
143 | DECLARE_COMPLETION_ONSTACK(wait); | |
144 | bool sync = (ios->done == NULL); | |
145 | int i, ret; | |
146 | ||
147 | if (sync) { | |
148 | ios->done = _sync_done; | |
149 | ios->private = &wait; | |
150 | } | |
151 | ||
152 | for (i = 0; i < ios->numdevs; i++) { | |
153 | struct osd_request *or = ios->per_dev[i].or; | |
154 | if (unlikely(!or)) | |
155 | continue; | |
156 | ||
9e9db456 | 157 | ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL); |
06886a5a | 158 | if (unlikely(ret)) { |
8ff660ab | 159 | ORE_DBGMSG("Failed to osd_finalize_request() => %d\n", |
06886a5a BH |
160 | ret); |
161 | return ret; | |
162 | } | |
163 | } | |
164 | ||
165 | kref_init(&ios->kref); | |
166 | ||
167 | for (i = 0; i < ios->numdevs; i++) { | |
168 | struct osd_request *or = ios->per_dev[i].or; | |
169 | if (unlikely(!or)) | |
170 | continue; | |
171 | ||
172 | kref_get(&ios->kref); | |
173 | osd_execute_request_async(or, _done_io, ios); | |
174 | } | |
175 | ||
176 | kref_put(&ios->kref, _last_io); | |
177 | ret = 0; | |
178 | ||
179 | if (sync) { | |
180 | wait_for_completion(&wait); | |
8ff660ab | 181 | ret = ore_check_io(ios, NULL); |
06886a5a | 182 | } |
b14f8ab2 BH |
183 | return ret; |
184 | } | |
185 | ||
22ddc556 BH |
186 | static void _clear_bio(struct bio *bio) |
187 | { | |
188 | struct bio_vec *bv; | |
189 | unsigned i; | |
190 | ||
191 | __bio_for_each_segment(bv, bio, i, 0) { | |
192 | unsigned this_count = bv->bv_len; | |
193 | ||
194 | if (likely(PAGE_SIZE == this_count)) | |
195 | clear_highpage(bv->bv_page); | |
196 | else | |
197 | zero_user(bv->bv_page, bv->bv_offset, this_count); | |
198 | } | |
199 | } | |
200 | ||
8ff660ab | 201 | int ore_check_io(struct ore_io_state *ios, u64 *resid) |
b14f8ab2 | 202 | { |
06886a5a BH |
203 | enum osd_err_priority acumulated_osd_err = 0; |
204 | int acumulated_lin_err = 0; | |
205 | int i; | |
b14f8ab2 | 206 | |
06886a5a BH |
207 | for (i = 0; i < ios->numdevs; i++) { |
208 | struct osd_sense_info osi; | |
22ddc556 BH |
209 | struct osd_request *or = ios->per_dev[i].or; |
210 | int ret; | |
211 | ||
212 | if (unlikely(!or)) | |
213 | continue; | |
06886a5a | 214 | |
22ddc556 | 215 | ret = osd_req_decode_sense(or, &osi); |
06886a5a BH |
216 | if (likely(!ret)) |
217 | continue; | |
218 | ||
22ddc556 BH |
219 | if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) { |
220 | /* start read offset passed endof file */ | |
221 | _clear_bio(ios->per_dev[i].bio); | |
8ff660ab | 222 | ORE_DBGMSG("start read offset passed end of file " |
22ddc556 | 223 | "offset=0x%llx, length=0x%llx\n", |
5d952b83 BH |
224 | _LLU(ios->per_dev[i].offset), |
225 | _LLU(ios->per_dev[i].length)); | |
22ddc556 BH |
226 | |
227 | continue; /* we recovered */ | |
06886a5a BH |
228 | } |
229 | ||
230 | if (osi.osd_err_pri >= acumulated_osd_err) { | |
231 | acumulated_osd_err = osi.osd_err_pri; | |
232 | acumulated_lin_err = ret; | |
233 | } | |
234 | } | |
235 | ||
236 | /* TODO: raid specific residual calculations */ | |
237 | if (resid) { | |
238 | if (likely(!acumulated_lin_err)) | |
239 | *resid = 0; | |
240 | else | |
241 | *resid = ios->length; | |
242 | } | |
243 | ||
244 | return acumulated_lin_err; | |
245 | } | |
cf283ade | 246 | EXPORT_SYMBOL(ore_check_io); |
06886a5a | 247 | |
b367e78b BH |
248 | /* |
249 | * L - logical offset into the file | |
250 | * | |
50a76fd3 | 251 | * U - The number of bytes in a stripe within a group |
b367e78b BH |
252 | * |
253 | * U = stripe_unit * group_width | |
254 | * | |
50a76fd3 BH |
255 | * T - The number of bytes striped within a group of component objects |
256 | * (before advancing to the next group) | |
b367e78b | 257 | * |
50a76fd3 BH |
258 | * T = stripe_unit * group_width * group_depth |
259 | * | |
260 | * S - The number of bytes striped across all component objects | |
261 | * before the pattern repeats | |
262 | * | |
263 | * S = stripe_unit * group_width * group_depth * group_count | |
264 | * | |
265 | * M - The "major" (i.e., across all components) stripe number | |
266 | * | |
267 | * M = L / S | |
268 | * | |
269 | * G - Counts the groups from the beginning of the major stripe | |
270 | * | |
271 | * G = (L - (M * S)) / T [or (L % S) / T] | |
272 | * | |
273 | * H - The byte offset within the group | |
274 | * | |
275 | * H = (L - (M * S)) % T [or (L % S) % T] | |
276 | * | |
277 | * N - The "minor" (i.e., across the group) stripe number | |
278 | * | |
279 | * N = H / U | |
b367e78b BH |
280 | * |
281 | * C - The component index coresponding to L | |
282 | * | |
50a76fd3 BH |
283 | * C = (H - (N * U)) / stripe_unit + G * group_width |
284 | * [or (L % U) / stripe_unit + G * group_width] | |
b367e78b BH |
285 | * |
286 | * O - The component offset coresponding to L | |
287 | * | |
50a76fd3 | 288 | * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit |
b367e78b | 289 | */ |
b367e78b BH |
290 | struct _striping_info { |
291 | u64 obj_offset; | |
50a76fd3 | 292 | u64 group_length; |
16f75bb3 | 293 | u64 M; /* for truncate */ |
b367e78b BH |
294 | unsigned dev; |
295 | unsigned unit_off; | |
296 | }; | |
297 | ||
8ff660ab | 298 | static void _calc_stripe_info(struct ore_layout *layout, u64 file_offset, |
b367e78b | 299 | struct _striping_info *si) |
5d952b83 | 300 | { |
16f75bb3 BH |
301 | u32 stripe_unit = layout->stripe_unit; |
302 | u32 group_width = layout->group_width; | |
303 | u64 group_depth = layout->group_depth; | |
50a76fd3 | 304 | |
b367e78b | 305 | u32 U = stripe_unit * group_width; |
50a76fd3 | 306 | u64 T = U * group_depth; |
16f75bb3 | 307 | u64 S = T * layout->group_count; |
50a76fd3 BH |
308 | u64 M = div64_u64(file_offset, S); |
309 | ||
310 | /* | |
311 | G = (L - (M * S)) / T | |
312 | H = (L - (M * S)) % T | |
313 | */ | |
314 | u64 LmodS = file_offset - M * S; | |
315 | u32 G = div64_u64(LmodS, T); | |
316 | u64 H = LmodS - G * T; | |
317 | ||
318 | u32 N = div_u64(H, U); | |
319 | ||
320 | /* "H - (N * U)" is just "H % U" so it's bound to u32 */ | |
321 | si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width; | |
16f75bb3 | 322 | si->dev *= layout->mirrors_p1; |
b367e78b | 323 | |
50a76fd3 | 324 | div_u64_rem(file_offset, stripe_unit, &si->unit_off); |
5d952b83 | 325 | |
50a76fd3 BH |
326 | si->obj_offset = si->unit_off + (N * stripe_unit) + |
327 | (M * group_depth * stripe_unit); | |
328 | ||
329 | si->group_length = T - H; | |
16f75bb3 | 330 | si->M = M; |
5d952b83 BH |
331 | } |
332 | ||
8ff660ab BH |
333 | static int _add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg, |
334 | unsigned pgbase, struct ore_per_dev_state *per_dev, | |
86093aaf | 335 | int cur_len) |
5d952b83 | 336 | { |
86093aaf | 337 | unsigned pg = *cur_pg; |
5d952b83 | 338 | struct request_queue *q = |
9e9db456 | 339 | osd_request_queue(_ios_od(ios, per_dev->dev)); |
5d952b83 BH |
340 | |
341 | per_dev->length += cur_len; | |
342 | ||
343 | if (per_dev->bio == NULL) { | |
344 | unsigned pages_in_stripe = ios->layout->group_width * | |
345 | (ios->layout->stripe_unit / PAGE_SIZE); | |
86093aaf | 346 | unsigned bio_size = (ios->nr_pages + pages_in_stripe) / |
5d952b83 BH |
347 | ios->layout->group_width; |
348 | ||
349 | per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); | |
350 | if (unlikely(!per_dev->bio)) { | |
8ff660ab | 351 | ORE_DBGMSG("Failed to allocate BIO size=%u\n", |
5d952b83 BH |
352 | bio_size); |
353 | return -ENOMEM; | |
354 | } | |
355 | } | |
356 | ||
357 | while (cur_len > 0) { | |
86093aaf BH |
358 | unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); |
359 | unsigned added_len; | |
5d952b83 | 360 | |
86093aaf BH |
361 | BUG_ON(ios->nr_pages <= pg); |
362 | cur_len -= pglen; | |
5d952b83 | 363 | |
86093aaf BH |
364 | added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg], |
365 | pglen, pgbase); | |
366 | if (unlikely(pglen != added_len)) | |
5d952b83 | 367 | return -ENOMEM; |
86093aaf BH |
368 | pgbase = 0; |
369 | ++pg; | |
5d952b83 BH |
370 | } |
371 | BUG_ON(cur_len); | |
372 | ||
86093aaf | 373 | *cur_pg = pg; |
5d952b83 BH |
374 | return 0; |
375 | } | |
376 | ||
8ff660ab | 377 | static int _prepare_one_group(struct ore_io_state *ios, u64 length, |
6e31609b | 378 | struct _striping_info *si) |
5d952b83 | 379 | { |
5d952b83 | 380 | unsigned stripe_unit = ios->layout->stripe_unit; |
b367e78b | 381 | unsigned mirrors_p1 = ios->layout->mirrors_p1; |
50a76fd3 | 382 | unsigned devs_in_group = ios->layout->group_width * mirrors_p1; |
b367e78b | 383 | unsigned dev = si->dev; |
50a76fd3 | 384 | unsigned first_dev = dev - (dev % devs_in_group); |
50a76fd3 BH |
385 | unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0; |
386 | unsigned cur_pg = ios->pages_consumed; | |
86093aaf | 387 | int ret = 0; |
5d952b83 | 388 | |
5d952b83 | 389 | while (length) { |
8ff660ab | 390 | struct ore_per_dev_state *per_dev = &ios->per_dev[dev]; |
b367e78b | 391 | unsigned cur_len, page_off = 0; |
5d952b83 BH |
392 | |
393 | if (!per_dev->length) { | |
b367e78b BH |
394 | per_dev->dev = dev; |
395 | if (dev < si->dev) { | |
396 | per_dev->offset = si->obj_offset + stripe_unit - | |
397 | si->unit_off; | |
398 | cur_len = stripe_unit; | |
399 | } else if (dev == si->dev) { | |
400 | per_dev->offset = si->obj_offset; | |
401 | cur_len = stripe_unit - si->unit_off; | |
402 | page_off = si->unit_off & ~PAGE_MASK; | |
403 | BUG_ON(page_off && (page_off != ios->pgbase)); | |
404 | } else { /* dev > si->dev */ | |
405 | per_dev->offset = si->obj_offset - si->unit_off; | |
406 | cur_len = stripe_unit; | |
407 | } | |
5d952b83 | 408 | |
6e31609b BH |
409 | if (max_comp < dev) |
410 | max_comp = dev; | |
5d952b83 | 411 | } else { |
b367e78b | 412 | cur_len = stripe_unit; |
5d952b83 | 413 | } |
b367e78b BH |
414 | if (cur_len >= length) |
415 | cur_len = length; | |
5d952b83 | 416 | |
86093aaf BH |
417 | ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev, |
418 | cur_len); | |
5d952b83 BH |
419 | if (unlikely(ret)) |
420 | goto out; | |
421 | ||
6e31609b BH |
422 | dev += mirrors_p1; |
423 | dev = (dev % devs_in_group) + first_dev; | |
5d952b83 BH |
424 | |
425 | length -= cur_len; | |
426 | } | |
427 | out: | |
50a76fd3 BH |
428 | ios->numdevs = max_comp + mirrors_p1; |
429 | ios->pages_consumed = cur_pg; | |
5d952b83 BH |
430 | return ret; |
431 | } | |
432 | ||
8ff660ab | 433 | static int _prepare_for_striping(struct ore_io_state *ios) |
b367e78b | 434 | { |
50a76fd3 | 435 | u64 length = ios->length; |
5002dd18 | 436 | u64 offset = ios->offset; |
b367e78b | 437 | struct _striping_info si; |
50a76fd3 | 438 | int ret = 0; |
b367e78b | 439 | |
b367e78b BH |
440 | if (!ios->pages) { |
441 | if (ios->kern_buff) { | |
8ff660ab | 442 | struct ore_per_dev_state *per_dev = &ios->per_dev[0]; |
b367e78b | 443 | |
16f75bb3 | 444 | _calc_stripe_info(ios->layout, ios->offset, &si); |
b367e78b BH |
445 | per_dev->offset = si.obj_offset; |
446 | per_dev->dev = si.dev; | |
447 | ||
448 | /* no cross device without page array */ | |
449 | BUG_ON((ios->layout->group_width > 1) && | |
450 | (si.unit_off + ios->length > | |
451 | ios->layout->stripe_unit)); | |
452 | } | |
453 | ios->numdevs = ios->layout->mirrors_p1; | |
454 | return 0; | |
455 | } | |
456 | ||
50a76fd3 | 457 | while (length) { |
16f75bb3 | 458 | _calc_stripe_info(ios->layout, offset, &si); |
5002dd18 | 459 | |
50a76fd3 BH |
460 | if (length < si.group_length) |
461 | si.group_length = length; | |
462 | ||
6e31609b | 463 | ret = _prepare_one_group(ios, si.group_length, &si); |
50a76fd3 BH |
464 | if (unlikely(ret)) |
465 | goto out; | |
466 | ||
5002dd18 | 467 | offset += si.group_length; |
50a76fd3 | 468 | length -= si.group_length; |
50a76fd3 BH |
469 | } |
470 | ||
471 | out: | |
472 | return ret; | |
b367e78b BH |
473 | } |
474 | ||
8ff660ab | 475 | int ore_create(struct ore_io_state *ios) |
06886a5a BH |
476 | { |
477 | int i, ret; | |
478 | ||
9e9db456 | 479 | for (i = 0; i < ios->comps->numdevs; i++) { |
06886a5a BH |
480 | struct osd_request *or; |
481 | ||
9e9db456 | 482 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
06886a5a | 483 | if (unlikely(!or)) { |
8ff660ab | 484 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
485 | ret = -ENOMEM; |
486 | goto out; | |
487 | } | |
488 | ios->per_dev[i].or = or; | |
489 | ios->numdevs++; | |
490 | ||
9e9db456 | 491 | osd_req_create_object(or, _ios_obj(ios, i)); |
06886a5a | 492 | } |
8ff660ab | 493 | ret = ore_io_execute(ios); |
06886a5a BH |
494 | |
495 | out: | |
496 | return ret; | |
497 | } | |
cf283ade | 498 | EXPORT_SYMBOL(ore_create); |
06886a5a | 499 | |
8ff660ab | 500 | int ore_remove(struct ore_io_state *ios) |
06886a5a BH |
501 | { |
502 | int i, ret; | |
503 | ||
9e9db456 | 504 | for (i = 0; i < ios->comps->numdevs; i++) { |
06886a5a BH |
505 | struct osd_request *or; |
506 | ||
9e9db456 | 507 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
06886a5a | 508 | if (unlikely(!or)) { |
8ff660ab | 509 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
510 | ret = -ENOMEM; |
511 | goto out; | |
512 | } | |
513 | ios->per_dev[i].or = or; | |
514 | ios->numdevs++; | |
515 | ||
9e9db456 | 516 | osd_req_remove_object(or, _ios_obj(ios, i)); |
06886a5a | 517 | } |
8ff660ab | 518 | ret = ore_io_execute(ios); |
06886a5a BH |
519 | |
520 | out: | |
521 | return ret; | |
522 | } | |
cf283ade | 523 | EXPORT_SYMBOL(ore_remove); |
06886a5a | 524 | |
8ff660ab | 525 | static int _write_mirror(struct ore_io_state *ios, int cur_comp) |
06886a5a | 526 | { |
8ff660ab | 527 | struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp]; |
5d952b83 BH |
528 | unsigned dev = ios->per_dev[cur_comp].dev; |
529 | unsigned last_comp = cur_comp + ios->layout->mirrors_p1; | |
530 | int ret = 0; | |
06886a5a | 531 | |
50a76fd3 BH |
532 | if (ios->pages && !master_dev->length) |
533 | return 0; /* Just an empty slot */ | |
534 | ||
5d952b83 | 535 | for (; cur_comp < last_comp; ++cur_comp, ++dev) { |
8ff660ab | 536 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
06886a5a BH |
537 | struct osd_request *or; |
538 | ||
9e9db456 | 539 | or = osd_start_request(_ios_od(ios, dev), GFP_KERNEL); |
06886a5a | 540 | if (unlikely(!or)) { |
8ff660ab | 541 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
542 | ret = -ENOMEM; |
543 | goto out; | |
544 | } | |
5d952b83 BH |
545 | per_dev->or = or; |
546 | per_dev->offset = master_dev->offset; | |
06886a5a | 547 | |
86093aaf | 548 | if (ios->pages) { |
06886a5a BH |
549 | struct bio *bio; |
550 | ||
5d952b83 | 551 | if (per_dev != master_dev) { |
04dc1e88 | 552 | bio = bio_kmalloc(GFP_KERNEL, |
5d952b83 | 553 | master_dev->bio->bi_max_vecs); |
04dc1e88 | 554 | if (unlikely(!bio)) { |
8ff660ab | 555 | ORE_DBGMSG( |
426d3107 | 556 | "Failed to allocate BIO size=%u\n", |
5d952b83 | 557 | master_dev->bio->bi_max_vecs); |
04dc1e88 BH |
558 | ret = -ENOMEM; |
559 | goto out; | |
560 | } | |
561 | ||
5d952b83 | 562 | __bio_clone(bio, master_dev->bio); |
04dc1e88 BH |
563 | bio->bi_bdev = NULL; |
564 | bio->bi_next = NULL; | |
5d952b83 BH |
565 | per_dev->length = master_dev->length; |
566 | per_dev->bio = bio; | |
567 | per_dev->dev = dev; | |
04dc1e88 | 568 | } else { |
5d952b83 BH |
569 | bio = master_dev->bio; |
570 | /* FIXME: bio_set_dir() */ | |
7b6d91da | 571 | bio->bi_rw |= REQ_WRITE; |
04dc1e88 | 572 | } |
06886a5a | 573 | |
9e9db456 BH |
574 | osd_req_write(or, _ios_obj(ios, dev), per_dev->offset, |
575 | bio, per_dev->length); | |
8ff660ab | 576 | ORE_DBGMSG("write(0x%llx) offset=0x%llx " |
34ce4e7c | 577 | "length=0x%llx dev=%d\n", |
9e9db456 BH |
578 | _LLU(_ios_obj(ios, dev)->id), |
579 | _LLU(per_dev->offset), | |
5d952b83 | 580 | _LLU(per_dev->length), dev); |
06886a5a | 581 | } else if (ios->kern_buff) { |
9e9db456 BH |
582 | ret = osd_req_write_kern(or, _ios_obj(ios, dev), |
583 | per_dev->offset, | |
584 | ios->kern_buff, ios->length); | |
5d952b83 BH |
585 | if (unlikely(ret)) |
586 | goto out; | |
8ff660ab | 587 | ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx " |
34ce4e7c | 588 | "length=0x%llx dev=%d\n", |
9e9db456 BH |
589 | _LLU(_ios_obj(ios, dev)->id), |
590 | _LLU(per_dev->offset), | |
5d952b83 | 591 | _LLU(ios->length), dev); |
06886a5a | 592 | } else { |
9e9db456 | 593 | osd_req_set_attributes(or, _ios_obj(ios, dev)); |
8ff660ab | 594 | ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", |
9e9db456 BH |
595 | _LLU(_ios_obj(ios, dev)->id), |
596 | ios->out_attr_len, dev); | |
06886a5a BH |
597 | } |
598 | ||
599 | if (ios->out_attr) | |
600 | osd_req_add_set_attr_list(or, ios->out_attr, | |
601 | ios->out_attr_len); | |
602 | ||
603 | if (ios->in_attr) | |
604 | osd_req_add_get_attr_list(or, ios->in_attr, | |
605 | ios->in_attr_len); | |
b14f8ab2 | 606 | } |
06886a5a BH |
607 | |
608 | out: | |
609 | return ret; | |
610 | } | |
611 | ||
8ff660ab | 612 | int ore_write(struct ore_io_state *ios) |
5d952b83 BH |
613 | { |
614 | int i; | |
615 | int ret; | |
616 | ||
617 | ret = _prepare_for_striping(ios); | |
618 | if (unlikely(ret)) | |
619 | return ret; | |
620 | ||
621 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
8ff660ab | 622 | ret = _write_mirror(ios, i); |
5d952b83 BH |
623 | if (unlikely(ret)) |
624 | return ret; | |
625 | } | |
626 | ||
8ff660ab | 627 | ret = ore_io_execute(ios); |
5d952b83 BH |
628 | return ret; |
629 | } | |
cf283ade | 630 | EXPORT_SYMBOL(ore_write); |
5d952b83 | 631 | |
8ff660ab | 632 | static int _read_mirror(struct ore_io_state *ios, unsigned cur_comp) |
06886a5a | 633 | { |
46f4d973 | 634 | struct osd_request *or; |
8ff660ab | 635 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
9e9db456 BH |
636 | struct osd_obj_id *obj = _ios_obj(ios, cur_comp); |
637 | unsigned first_dev = (unsigned)obj->id; | |
06886a5a | 638 | |
50a76fd3 BH |
639 | if (ios->pages && !per_dev->length) |
640 | return 0; /* Just an empty slot */ | |
641 | ||
5d952b83 | 642 | first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; |
9e9db456 | 643 | or = osd_start_request(_ios_od(ios, first_dev), GFP_KERNEL); |
46f4d973 | 644 | if (unlikely(!or)) { |
8ff660ab | 645 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
46f4d973 BH |
646 | return -ENOMEM; |
647 | } | |
648 | per_dev->or = or; | |
46f4d973 | 649 | |
86093aaf | 650 | if (ios->pages) { |
9e9db456 | 651 | osd_req_read(or, obj, per_dev->offset, |
5d952b83 | 652 | per_dev->bio, per_dev->length); |
8ff660ab | 653 | ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" |
9e9db456 | 654 | " dev=%d\n", _LLU(obj->id), |
5d952b83 | 655 | _LLU(per_dev->offset), _LLU(per_dev->length), |
46f4d973 BH |
656 | first_dev); |
657 | } else if (ios->kern_buff) { | |
9e9db456 | 658 | int ret = osd_req_read_kern(or, obj, per_dev->offset, |
46f4d973 | 659 | ios->kern_buff, ios->length); |
8ff660ab | 660 | ORE_DBGMSG2("read_kern(0x%llx) offset=0x%llx " |
46f4d973 | 661 | "length=0x%llx dev=%d ret=>%d\n", |
9e9db456 | 662 | _LLU(obj->id), _LLU(per_dev->offset), |
46f4d973 BH |
663 | _LLU(ios->length), first_dev, ret); |
664 | if (unlikely(ret)) | |
665 | return ret; | |
666 | } else { | |
9e9db456 | 667 | osd_req_get_attributes(or, obj); |
8ff660ab | 668 | ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", |
9e9db456 BH |
669 | _LLU(obj->id), |
670 | ios->in_attr_len, first_dev); | |
46f4d973 | 671 | } |
46f4d973 BH |
672 | if (ios->out_attr) |
673 | osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); | |
b14f8ab2 | 674 | |
46f4d973 BH |
675 | if (ios->in_attr) |
676 | osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); | |
b14f8ab2 | 677 | |
5d952b83 BH |
678 | return 0; |
679 | } | |
680 | ||
8ff660ab | 681 | int ore_read(struct ore_io_state *ios) |
5d952b83 BH |
682 | { |
683 | int i; | |
684 | int ret; | |
685 | ||
686 | ret = _prepare_for_striping(ios); | |
687 | if (unlikely(ret)) | |
688 | return ret; | |
689 | ||
690 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
8ff660ab | 691 | ret = _read_mirror(ios, i); |
5d952b83 BH |
692 | if (unlikely(ret)) |
693 | return ret; | |
694 | } | |
695 | ||
8ff660ab | 696 | ret = ore_io_execute(ios); |
5d952b83 | 697 | return ret; |
b14f8ab2 | 698 | } |
cf283ade | 699 | EXPORT_SYMBOL(ore_read); |
b14f8ab2 | 700 | |
8ff660ab | 701 | int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr) |
b14f8ab2 BH |
702 | { |
703 | struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ | |
704 | void *iter = NULL; | |
705 | int nelem; | |
706 | ||
707 | do { | |
708 | nelem = 1; | |
06886a5a BH |
709 | osd_req_decode_get_attr_list(ios->per_dev[0].or, |
710 | &cur_attr, &nelem, &iter); | |
b14f8ab2 BH |
711 | if ((cur_attr.attr_page == attr->attr_page) && |
712 | (cur_attr.attr_id == attr->attr_id)) { | |
713 | attr->len = cur_attr.len; | |
714 | attr->val_ptr = cur_attr.val_ptr; | |
715 | return 0; | |
716 | } | |
717 | } while (iter); | |
718 | ||
719 | return -EIO; | |
720 | } | |
cf283ade | 721 | EXPORT_SYMBOL(extract_attr_from_ios); |
06886a5a | 722 | |
8ff660ab | 723 | static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp, |
5d952b83 BH |
724 | struct osd_attr *attr) |
725 | { | |
726 | int last_comp = cur_comp + ios->layout->mirrors_p1; | |
727 | ||
728 | for (; cur_comp < last_comp; ++cur_comp) { | |
8ff660ab | 729 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
5d952b83 BH |
730 | struct osd_request *or; |
731 | ||
9e9db456 | 732 | or = osd_start_request(_ios_od(ios, cur_comp), GFP_KERNEL); |
5d952b83 | 733 | if (unlikely(!or)) { |
8ff660ab | 734 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
5d952b83 BH |
735 | return -ENOMEM; |
736 | } | |
737 | per_dev->or = or; | |
738 | ||
9e9db456 | 739 | osd_req_set_attributes(or, _ios_obj(ios, cur_comp)); |
5d952b83 BH |
740 | osd_req_add_set_attr_list(or, attr, 1); |
741 | } | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
16f75bb3 BH |
746 | struct _trunc_info { |
747 | struct _striping_info si; | |
748 | u64 prev_group_obj_off; | |
749 | u64 next_group_obj_off; | |
750 | ||
751 | unsigned first_group_dev; | |
752 | unsigned nex_group_dev; | |
753 | unsigned max_devs; | |
754 | }; | |
755 | ||
8ff660ab | 756 | void _calc_trunk_info(struct ore_layout *layout, u64 file_offset, |
16f75bb3 BH |
757 | struct _trunc_info *ti) |
758 | { | |
759 | unsigned stripe_unit = layout->stripe_unit; | |
760 | ||
761 | _calc_stripe_info(layout, file_offset, &ti->si); | |
762 | ||
763 | ti->prev_group_obj_off = ti->si.M * stripe_unit; | |
764 | ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0; | |
765 | ||
766 | ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width); | |
767 | ti->nex_group_dev = ti->first_group_dev + layout->group_width; | |
768 | ti->max_devs = layout->group_width * layout->group_count; | |
769 | } | |
770 | ||
8ff660ab | 771 | int ore_truncate(struct ore_layout *layout, struct ore_components *comps, |
9e9db456 | 772 | u64 size) |
06886a5a | 773 | { |
8ff660ab | 774 | struct ore_io_state *ios; |
5d952b83 BH |
775 | struct exofs_trunc_attr { |
776 | struct osd_attr attr; | |
777 | __be64 newsize; | |
778 | } *size_attrs; | |
16f75bb3 | 779 | struct _trunc_info ti; |
06886a5a BH |
780 | int i, ret; |
781 | ||
8ff660ab | 782 | ret = ore_get_io_state(layout, comps, &ios); |
5d952b83 BH |
783 | if (unlikely(ret)) |
784 | return ret; | |
785 | ||
16f75bb3 BH |
786 | _calc_trunk_info(ios->layout, size, &ti); |
787 | ||
788 | size_attrs = kcalloc(ti.max_devs, sizeof(*size_attrs), | |
5d952b83 BH |
789 | GFP_KERNEL); |
790 | if (unlikely(!size_attrs)) { | |
791 | ret = -ENOMEM; | |
792 | goto out; | |
793 | } | |
06886a5a | 794 | |
9e9db456 | 795 | ios->numdevs = ios->comps->numdevs; |
06886a5a | 796 | |
16f75bb3 | 797 | for (i = 0; i < ti.max_devs; ++i) { |
5d952b83 BH |
798 | struct exofs_trunc_attr *size_attr = &size_attrs[i]; |
799 | u64 obj_size; | |
06886a5a | 800 | |
16f75bb3 BH |
801 | if (i < ti.first_group_dev) |
802 | obj_size = ti.prev_group_obj_off; | |
803 | else if (i >= ti.nex_group_dev) | |
804 | obj_size = ti.next_group_obj_off; | |
805 | else if (i < ti.si.dev) /* dev within this group */ | |
806 | obj_size = ti.si.obj_offset + | |
807 | ios->layout->stripe_unit - ti.si.unit_off; | |
808 | else if (i == ti.si.dev) | |
809 | obj_size = ti.si.obj_offset; | |
810 | else /* i > ti.dev */ | |
811 | obj_size = ti.si.obj_offset - ti.si.unit_off; | |
06886a5a | 812 | |
5d952b83 BH |
813 | size_attr->newsize = cpu_to_be64(obj_size); |
814 | size_attr->attr = g_attr_logical_length; | |
815 | size_attr->attr.val_ptr = &size_attr->newsize; | |
816 | ||
8ff660ab | 817 | ORE_DBGMSG("trunc(0x%llx) obj_offset=0x%llx dev=%d\n", |
9e9db456 | 818 | _LLU(comps->comps->obj.id), _LLU(obj_size), i); |
5d952b83 BH |
819 | ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, |
820 | &size_attr->attr); | |
821 | if (unlikely(ret)) | |
822 | goto out; | |
06886a5a | 823 | } |
8ff660ab | 824 | ret = ore_io_execute(ios); |
06886a5a BH |
825 | |
826 | out: | |
5d952b83 | 827 | kfree(size_attrs); |
8ff660ab | 828 | ore_put_io_state(ios); |
06886a5a BH |
829 | return ret; |
830 | } | |
cf283ade | 831 | EXPORT_SYMBOL(ore_truncate); |
85e44df4 BH |
832 | |
833 | const struct osd_attr g_attr_logical_length = ATTR_DEF( | |
834 | OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8); | |
cf283ade | 835 | EXPORT_SYMBOL(g_attr_logical_length); |