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> |
b14f8ab2 | 26 | #include <scsi/scsi_device.h> |
5d952b83 | 27 | #include <asm/div64.h> |
b14f8ab2 BH |
28 | |
29 | #include "exofs.h" | |
30 | ||
34ce4e7c BH |
31 | #define EXOFS_DBGMSG2(M...) do {} while (0) |
32 | /* #define EXOFS_DBGMSG2 EXOFS_DBGMSG */ | |
33 | ||
06886a5a | 34 | void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj) |
b14f8ab2 | 35 | { |
06886a5a BH |
36 | osd_sec_init_nosec_doall_caps(cred_a, obj, false, true); |
37 | } | |
38 | ||
39 | int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj, | |
40 | u64 offset, void *p, unsigned length) | |
41 | { | |
42 | struct osd_request *or = osd_start_request(od, GFP_KERNEL); | |
43 | /* struct osd_sense_info osi = {.key = 0};*/ | |
44 | int ret; | |
45 | ||
46 | if (unlikely(!or)) { | |
47 | EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__); | |
48 | return -ENOMEM; | |
49 | } | |
50 | ret = osd_req_read_kern(or, obj, offset, p, length); | |
51 | if (unlikely(ret)) { | |
52 | EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__); | |
53 | goto out; | |
b14f8ab2 BH |
54 | } |
55 | ||
06886a5a BH |
56 | ret = osd_finalize_request(or, 0, cred, NULL); |
57 | if (unlikely(ret)) { | |
426d3107 | 58 | EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n", ret); |
06886a5a BH |
59 | goto out; |
60 | } | |
b14f8ab2 | 61 | |
06886a5a BH |
62 | ret = osd_execute_request(or); |
63 | if (unlikely(ret)) | |
64 | EXOFS_DBGMSG("osd_execute_request() => %d\n", ret); | |
65 | /* osd_req_decode_sense(or, ret); */ | |
b14f8ab2 | 66 | |
06886a5a BH |
67 | out: |
68 | osd_end_request(or); | |
b14f8ab2 BH |
69 | return ret; |
70 | } | |
71 | ||
45d3abcb BH |
72 | int exofs_get_io_state(struct exofs_layout *layout, |
73 | struct exofs_io_state **pios) | |
b14f8ab2 | 74 | { |
06886a5a BH |
75 | struct exofs_io_state *ios; |
76 | ||
77 | /*TODO: Maybe use kmem_cach per sbi of size | |
45d3abcb | 78 | * exofs_io_state_size(layout->s_numdevs) |
06886a5a | 79 | */ |
45d3abcb | 80 | ios = kzalloc(exofs_io_state_size(layout->s_numdevs), GFP_KERNEL); |
06886a5a | 81 | if (unlikely(!ios)) { |
426d3107 | 82 | EXOFS_DBGMSG("Failed kzalloc bytes=%d\n", |
45d3abcb | 83 | exofs_io_state_size(layout->s_numdevs)); |
06886a5a BH |
84 | *pios = NULL; |
85 | return -ENOMEM; | |
86 | } | |
87 | ||
45d3abcb BH |
88 | ios->layout = layout; |
89 | ios->obj.partition = layout->s_pid; | |
06886a5a BH |
90 | *pios = ios; |
91 | return 0; | |
b14f8ab2 BH |
92 | } |
93 | ||
06886a5a | 94 | void exofs_put_io_state(struct exofs_io_state *ios) |
b14f8ab2 | 95 | { |
06886a5a BH |
96 | if (ios) { |
97 | unsigned i; | |
b14f8ab2 | 98 | |
06886a5a BH |
99 | for (i = 0; i < ios->numdevs; i++) { |
100 | struct exofs_per_dev_state *per_dev = &ios->per_dev[i]; | |
101 | ||
102 | if (per_dev->or) | |
103 | osd_end_request(per_dev->or); | |
104 | if (per_dev->bio) | |
105 | bio_put(per_dev->bio); | |
106 | } | |
107 | ||
108 | kfree(ios); | |
b14f8ab2 | 109 | } |
06886a5a | 110 | } |
b14f8ab2 | 111 | |
d9c740d2 BH |
112 | unsigned exofs_layout_od_id(struct exofs_layout *layout, |
113 | osd_id obj_no, unsigned layout_index) | |
114 | { | |
5d952b83 BH |
115 | /* switch (layout->lay_func) { |
116 | case LAYOUT_MOVING_WINDOW: | |
117 | {*/ | |
118 | unsigned dev_mod = obj_no; | |
119 | ||
120 | return (layout_index + dev_mod * layout->mirrors_p1) % | |
121 | layout->s_numdevs; | |
122 | /* } | |
123 | case LAYOUT_FUNC_IMPLICT: | |
124 | return layout->devs[layout_index]; | |
125 | }*/ | |
d9c740d2 BH |
126 | } |
127 | ||
128 | static inline struct osd_dev *exofs_ios_od(struct exofs_io_state *ios, | |
129 | unsigned layout_index) | |
130 | { | |
131 | return ios->layout->s_ods[ | |
132 | exofs_layout_od_id(ios->layout, ios->obj.id, layout_index)]; | |
133 | } | |
134 | ||
06886a5a BH |
135 | static void _sync_done(struct exofs_io_state *ios, void *p) |
136 | { | |
137 | struct completion *waiting = p; | |
b14f8ab2 | 138 | |
06886a5a BH |
139 | complete(waiting); |
140 | } | |
141 | ||
142 | static void _last_io(struct kref *kref) | |
143 | { | |
144 | struct exofs_io_state *ios = container_of( | |
145 | kref, struct exofs_io_state, kref); | |
146 | ||
147 | ios->done(ios, ios->private); | |
148 | } | |
149 | ||
150 | static void _done_io(struct osd_request *or, void *p) | |
151 | { | |
152 | struct exofs_io_state *ios = p; | |
153 | ||
154 | kref_put(&ios->kref, _last_io); | |
155 | } | |
156 | ||
157 | static int exofs_io_execute(struct exofs_io_state *ios) | |
158 | { | |
159 | DECLARE_COMPLETION_ONSTACK(wait); | |
160 | bool sync = (ios->done == NULL); | |
161 | int i, ret; | |
162 | ||
163 | if (sync) { | |
164 | ios->done = _sync_done; | |
165 | ios->private = &wait; | |
166 | } | |
167 | ||
168 | for (i = 0; i < ios->numdevs; i++) { | |
169 | struct osd_request *or = ios->per_dev[i].or; | |
170 | if (unlikely(!or)) | |
171 | continue; | |
172 | ||
173 | ret = osd_finalize_request(or, 0, ios->cred, NULL); | |
174 | if (unlikely(ret)) { | |
426d3107 | 175 | EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n", |
06886a5a BH |
176 | ret); |
177 | return ret; | |
178 | } | |
179 | } | |
180 | ||
181 | kref_init(&ios->kref); | |
182 | ||
183 | for (i = 0; i < ios->numdevs; i++) { | |
184 | struct osd_request *or = ios->per_dev[i].or; | |
185 | if (unlikely(!or)) | |
186 | continue; | |
187 | ||
188 | kref_get(&ios->kref); | |
189 | osd_execute_request_async(or, _done_io, ios); | |
190 | } | |
191 | ||
192 | kref_put(&ios->kref, _last_io); | |
193 | ret = 0; | |
194 | ||
195 | if (sync) { | |
196 | wait_for_completion(&wait); | |
197 | ret = exofs_check_io(ios, NULL); | |
198 | } | |
b14f8ab2 BH |
199 | return ret; |
200 | } | |
201 | ||
22ddc556 BH |
202 | static void _clear_bio(struct bio *bio) |
203 | { | |
204 | struct bio_vec *bv; | |
205 | unsigned i; | |
206 | ||
207 | __bio_for_each_segment(bv, bio, i, 0) { | |
208 | unsigned this_count = bv->bv_len; | |
209 | ||
210 | if (likely(PAGE_SIZE == this_count)) | |
211 | clear_highpage(bv->bv_page); | |
212 | else | |
213 | zero_user(bv->bv_page, bv->bv_offset, this_count); | |
214 | } | |
215 | } | |
216 | ||
06886a5a | 217 | int exofs_check_io(struct exofs_io_state *ios, u64 *resid) |
b14f8ab2 | 218 | { |
06886a5a BH |
219 | enum osd_err_priority acumulated_osd_err = 0; |
220 | int acumulated_lin_err = 0; | |
221 | int i; | |
b14f8ab2 | 222 | |
06886a5a BH |
223 | for (i = 0; i < ios->numdevs; i++) { |
224 | struct osd_sense_info osi; | |
22ddc556 BH |
225 | struct osd_request *or = ios->per_dev[i].or; |
226 | int ret; | |
227 | ||
228 | if (unlikely(!or)) | |
229 | continue; | |
06886a5a | 230 | |
22ddc556 | 231 | ret = osd_req_decode_sense(or, &osi); |
06886a5a BH |
232 | if (likely(!ret)) |
233 | continue; | |
234 | ||
22ddc556 BH |
235 | if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) { |
236 | /* start read offset passed endof file */ | |
237 | _clear_bio(ios->per_dev[i].bio); | |
238 | EXOFS_DBGMSG("start read offset passed end of file " | |
239 | "offset=0x%llx, length=0x%llx\n", | |
5d952b83 BH |
240 | _LLU(ios->per_dev[i].offset), |
241 | _LLU(ios->per_dev[i].length)); | |
22ddc556 BH |
242 | |
243 | continue; /* we recovered */ | |
06886a5a BH |
244 | } |
245 | ||
246 | if (osi.osd_err_pri >= acumulated_osd_err) { | |
247 | acumulated_osd_err = osi.osd_err_pri; | |
248 | acumulated_lin_err = ret; | |
249 | } | |
250 | } | |
251 | ||
252 | /* TODO: raid specific residual calculations */ | |
253 | if (resid) { | |
254 | if (likely(!acumulated_lin_err)) | |
255 | *resid = 0; | |
256 | else | |
257 | *resid = ios->length; | |
258 | } | |
259 | ||
260 | return acumulated_lin_err; | |
261 | } | |
262 | ||
b367e78b BH |
263 | /* |
264 | * L - logical offset into the file | |
265 | * | |
50a76fd3 | 266 | * U - The number of bytes in a stripe within a group |
b367e78b BH |
267 | * |
268 | * U = stripe_unit * group_width | |
269 | * | |
50a76fd3 BH |
270 | * T - The number of bytes striped within a group of component objects |
271 | * (before advancing to the next group) | |
b367e78b | 272 | * |
50a76fd3 BH |
273 | * T = stripe_unit * group_width * group_depth |
274 | * | |
275 | * S - The number of bytes striped across all component objects | |
276 | * before the pattern repeats | |
277 | * | |
278 | * S = stripe_unit * group_width * group_depth * group_count | |
279 | * | |
280 | * M - The "major" (i.e., across all components) stripe number | |
281 | * | |
282 | * M = L / S | |
283 | * | |
284 | * G - Counts the groups from the beginning of the major stripe | |
285 | * | |
286 | * G = (L - (M * S)) / T [or (L % S) / T] | |
287 | * | |
288 | * H - The byte offset within the group | |
289 | * | |
290 | * H = (L - (M * S)) % T [or (L % S) % T] | |
291 | * | |
292 | * N - The "minor" (i.e., across the group) stripe number | |
293 | * | |
294 | * N = H / U | |
b367e78b BH |
295 | * |
296 | * C - The component index coresponding to L | |
297 | * | |
50a76fd3 BH |
298 | * C = (H - (N * U)) / stripe_unit + G * group_width |
299 | * [or (L % U) / stripe_unit + G * group_width] | |
b367e78b BH |
300 | * |
301 | * O - The component offset coresponding to L | |
302 | * | |
50a76fd3 | 303 | * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit |
b367e78b | 304 | */ |
b367e78b BH |
305 | struct _striping_info { |
306 | u64 obj_offset; | |
50a76fd3 | 307 | u64 group_length; |
16f75bb3 | 308 | u64 M; /* for truncate */ |
b367e78b BH |
309 | unsigned dev; |
310 | unsigned unit_off; | |
311 | }; | |
312 | ||
16f75bb3 | 313 | static void _calc_stripe_info(struct exofs_layout *layout, u64 file_offset, |
b367e78b | 314 | struct _striping_info *si) |
5d952b83 | 315 | { |
16f75bb3 BH |
316 | u32 stripe_unit = layout->stripe_unit; |
317 | u32 group_width = layout->group_width; | |
318 | u64 group_depth = layout->group_depth; | |
50a76fd3 | 319 | |
b367e78b | 320 | u32 U = stripe_unit * group_width; |
50a76fd3 | 321 | u64 T = U * group_depth; |
16f75bb3 | 322 | u64 S = T * layout->group_count; |
50a76fd3 BH |
323 | u64 M = div64_u64(file_offset, S); |
324 | ||
325 | /* | |
326 | G = (L - (M * S)) / T | |
327 | H = (L - (M * S)) % T | |
328 | */ | |
329 | u64 LmodS = file_offset - M * S; | |
330 | u32 G = div64_u64(LmodS, T); | |
331 | u64 H = LmodS - G * T; | |
332 | ||
333 | u32 N = div_u64(H, U); | |
334 | ||
335 | /* "H - (N * U)" is just "H % U" so it's bound to u32 */ | |
336 | si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width; | |
16f75bb3 | 337 | si->dev *= layout->mirrors_p1; |
b367e78b | 338 | |
50a76fd3 | 339 | div_u64_rem(file_offset, stripe_unit, &si->unit_off); |
5d952b83 | 340 | |
50a76fd3 BH |
341 | si->obj_offset = si->unit_off + (N * stripe_unit) + |
342 | (M * group_depth * stripe_unit); | |
343 | ||
344 | si->group_length = T - H; | |
16f75bb3 | 345 | si->M = M; |
5d952b83 BH |
346 | } |
347 | ||
86093aaf BH |
348 | static int _add_stripe_unit(struct exofs_io_state *ios, unsigned *cur_pg, |
349 | unsigned pgbase, struct exofs_per_dev_state *per_dev, | |
350 | int cur_len) | |
5d952b83 | 351 | { |
86093aaf | 352 | unsigned pg = *cur_pg; |
5d952b83 BH |
353 | struct request_queue *q = |
354 | osd_request_queue(exofs_ios_od(ios, per_dev->dev)); | |
355 | ||
356 | per_dev->length += cur_len; | |
357 | ||
358 | if (per_dev->bio == NULL) { | |
359 | unsigned pages_in_stripe = ios->layout->group_width * | |
360 | (ios->layout->stripe_unit / PAGE_SIZE); | |
86093aaf | 361 | unsigned bio_size = (ios->nr_pages + pages_in_stripe) / |
5d952b83 BH |
362 | ios->layout->group_width; |
363 | ||
364 | per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); | |
365 | if (unlikely(!per_dev->bio)) { | |
426d3107 | 366 | EXOFS_DBGMSG("Failed to allocate BIO size=%u\n", |
5d952b83 BH |
367 | bio_size); |
368 | return -ENOMEM; | |
369 | } | |
370 | } | |
371 | ||
372 | while (cur_len > 0) { | |
86093aaf BH |
373 | unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); |
374 | unsigned added_len; | |
5d952b83 | 375 | |
86093aaf BH |
376 | BUG_ON(ios->nr_pages <= pg); |
377 | cur_len -= pglen; | |
5d952b83 | 378 | |
86093aaf BH |
379 | added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg], |
380 | pglen, pgbase); | |
381 | if (unlikely(pglen != added_len)) | |
5d952b83 | 382 | return -ENOMEM; |
86093aaf BH |
383 | pgbase = 0; |
384 | ++pg; | |
5d952b83 BH |
385 | } |
386 | BUG_ON(cur_len); | |
387 | ||
86093aaf | 388 | *cur_pg = pg; |
5d952b83 BH |
389 | return 0; |
390 | } | |
391 | ||
50a76fd3 | 392 | static int _prepare_one_group(struct exofs_io_state *ios, u64 length, |
6e31609b | 393 | struct _striping_info *si) |
5d952b83 | 394 | { |
5d952b83 | 395 | unsigned stripe_unit = ios->layout->stripe_unit; |
b367e78b | 396 | unsigned mirrors_p1 = ios->layout->mirrors_p1; |
50a76fd3 | 397 | unsigned devs_in_group = ios->layout->group_width * mirrors_p1; |
b367e78b | 398 | unsigned dev = si->dev; |
50a76fd3 | 399 | unsigned first_dev = dev - (dev % devs_in_group); |
50a76fd3 BH |
400 | unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0; |
401 | unsigned cur_pg = ios->pages_consumed; | |
86093aaf | 402 | int ret = 0; |
5d952b83 | 403 | |
5d952b83 | 404 | while (length) { |
6e31609b | 405 | struct exofs_per_dev_state *per_dev = &ios->per_dev[dev]; |
b367e78b | 406 | unsigned cur_len, page_off = 0; |
5d952b83 BH |
407 | |
408 | if (!per_dev->length) { | |
b367e78b BH |
409 | per_dev->dev = dev; |
410 | if (dev < si->dev) { | |
411 | per_dev->offset = si->obj_offset + stripe_unit - | |
412 | si->unit_off; | |
413 | cur_len = stripe_unit; | |
414 | } else if (dev == si->dev) { | |
415 | per_dev->offset = si->obj_offset; | |
416 | cur_len = stripe_unit - si->unit_off; | |
417 | page_off = si->unit_off & ~PAGE_MASK; | |
418 | BUG_ON(page_off && (page_off != ios->pgbase)); | |
419 | } else { /* dev > si->dev */ | |
420 | per_dev->offset = si->obj_offset - si->unit_off; | |
421 | cur_len = stripe_unit; | |
422 | } | |
5d952b83 | 423 | |
6e31609b BH |
424 | if (max_comp < dev) |
425 | max_comp = dev; | |
5d952b83 | 426 | } else { |
b367e78b | 427 | cur_len = stripe_unit; |
5d952b83 | 428 | } |
b367e78b BH |
429 | if (cur_len >= length) |
430 | cur_len = length; | |
5d952b83 | 431 | |
86093aaf BH |
432 | ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev, |
433 | cur_len); | |
5d952b83 BH |
434 | if (unlikely(ret)) |
435 | goto out; | |
436 | ||
6e31609b BH |
437 | dev += mirrors_p1; |
438 | dev = (dev % devs_in_group) + first_dev; | |
5d952b83 BH |
439 | |
440 | length -= cur_len; | |
441 | } | |
442 | out: | |
50a76fd3 BH |
443 | ios->numdevs = max_comp + mirrors_p1; |
444 | ios->pages_consumed = cur_pg; | |
5d952b83 BH |
445 | return ret; |
446 | } | |
447 | ||
b367e78b BH |
448 | static int _prepare_for_striping(struct exofs_io_state *ios) |
449 | { | |
50a76fd3 | 450 | u64 length = ios->length; |
5002dd18 | 451 | u64 offset = ios->offset; |
b367e78b | 452 | struct _striping_info si; |
50a76fd3 | 453 | int ret = 0; |
b367e78b | 454 | |
b367e78b BH |
455 | if (!ios->pages) { |
456 | if (ios->kern_buff) { | |
457 | struct exofs_per_dev_state *per_dev = &ios->per_dev[0]; | |
458 | ||
16f75bb3 | 459 | _calc_stripe_info(ios->layout, ios->offset, &si); |
b367e78b BH |
460 | per_dev->offset = si.obj_offset; |
461 | per_dev->dev = si.dev; | |
462 | ||
463 | /* no cross device without page array */ | |
464 | BUG_ON((ios->layout->group_width > 1) && | |
465 | (si.unit_off + ios->length > | |
466 | ios->layout->stripe_unit)); | |
467 | } | |
468 | ios->numdevs = ios->layout->mirrors_p1; | |
469 | return 0; | |
470 | } | |
471 | ||
50a76fd3 | 472 | while (length) { |
16f75bb3 | 473 | _calc_stripe_info(ios->layout, offset, &si); |
5002dd18 | 474 | |
50a76fd3 BH |
475 | if (length < si.group_length) |
476 | si.group_length = length; | |
477 | ||
6e31609b | 478 | ret = _prepare_one_group(ios, si.group_length, &si); |
50a76fd3 BH |
479 | if (unlikely(ret)) |
480 | goto out; | |
481 | ||
5002dd18 | 482 | offset += si.group_length; |
50a76fd3 | 483 | length -= si.group_length; |
50a76fd3 BH |
484 | } |
485 | ||
486 | out: | |
487 | return ret; | |
b367e78b BH |
488 | } |
489 | ||
06886a5a BH |
490 | int exofs_sbi_create(struct exofs_io_state *ios) |
491 | { | |
492 | int i, ret; | |
493 | ||
45d3abcb | 494 | for (i = 0; i < ios->layout->s_numdevs; i++) { |
06886a5a BH |
495 | struct osd_request *or; |
496 | ||
d9c740d2 | 497 | or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL); |
06886a5a BH |
498 | if (unlikely(!or)) { |
499 | EXOFS_ERR("%s: osd_start_request failed\n", __func__); | |
500 | ret = -ENOMEM; | |
501 | goto out; | |
502 | } | |
503 | ios->per_dev[i].or = or; | |
504 | ios->numdevs++; | |
505 | ||
506 | osd_req_create_object(or, &ios->obj); | |
507 | } | |
508 | ret = exofs_io_execute(ios); | |
509 | ||
510 | out: | |
511 | return ret; | |
512 | } | |
513 | ||
514 | int exofs_sbi_remove(struct exofs_io_state *ios) | |
515 | { | |
516 | int i, ret; | |
517 | ||
45d3abcb | 518 | for (i = 0; i < ios->layout->s_numdevs; i++) { |
06886a5a BH |
519 | struct osd_request *or; |
520 | ||
d9c740d2 | 521 | or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL); |
06886a5a BH |
522 | if (unlikely(!or)) { |
523 | EXOFS_ERR("%s: osd_start_request failed\n", __func__); | |
524 | ret = -ENOMEM; | |
525 | goto out; | |
526 | } | |
527 | ios->per_dev[i].or = or; | |
528 | ios->numdevs++; | |
529 | ||
530 | osd_req_remove_object(or, &ios->obj); | |
531 | } | |
532 | ret = exofs_io_execute(ios); | |
533 | ||
534 | out: | |
535 | return ret; | |
536 | } | |
537 | ||
5d952b83 | 538 | static int _sbi_write_mirror(struct exofs_io_state *ios, int cur_comp) |
06886a5a | 539 | { |
5d952b83 BH |
540 | struct exofs_per_dev_state *master_dev = &ios->per_dev[cur_comp]; |
541 | unsigned dev = ios->per_dev[cur_comp].dev; | |
542 | unsigned last_comp = cur_comp + ios->layout->mirrors_p1; | |
543 | int ret = 0; | |
06886a5a | 544 | |
50a76fd3 BH |
545 | if (ios->pages && !master_dev->length) |
546 | return 0; /* Just an empty slot */ | |
547 | ||
5d952b83 BH |
548 | for (; cur_comp < last_comp; ++cur_comp, ++dev) { |
549 | struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp]; | |
06886a5a BH |
550 | struct osd_request *or; |
551 | ||
5d952b83 | 552 | or = osd_start_request(exofs_ios_od(ios, dev), GFP_KERNEL); |
06886a5a BH |
553 | if (unlikely(!or)) { |
554 | EXOFS_ERR("%s: osd_start_request failed\n", __func__); | |
555 | ret = -ENOMEM; | |
556 | goto out; | |
557 | } | |
5d952b83 BH |
558 | per_dev->or = or; |
559 | per_dev->offset = master_dev->offset; | |
06886a5a | 560 | |
86093aaf | 561 | if (ios->pages) { |
06886a5a BH |
562 | struct bio *bio; |
563 | ||
5d952b83 | 564 | if (per_dev != master_dev) { |
04dc1e88 | 565 | bio = bio_kmalloc(GFP_KERNEL, |
5d952b83 | 566 | master_dev->bio->bi_max_vecs); |
04dc1e88 | 567 | if (unlikely(!bio)) { |
34ce4e7c | 568 | EXOFS_DBGMSG( |
426d3107 | 569 | "Failed to allocate BIO size=%u\n", |
5d952b83 | 570 | master_dev->bio->bi_max_vecs); |
04dc1e88 BH |
571 | ret = -ENOMEM; |
572 | goto out; | |
573 | } | |
574 | ||
5d952b83 | 575 | __bio_clone(bio, master_dev->bio); |
04dc1e88 BH |
576 | bio->bi_bdev = NULL; |
577 | bio->bi_next = NULL; | |
5d952b83 BH |
578 | per_dev->length = master_dev->length; |
579 | per_dev->bio = bio; | |
580 | per_dev->dev = dev; | |
04dc1e88 | 581 | } else { |
5d952b83 BH |
582 | bio = master_dev->bio; |
583 | /* FIXME: bio_set_dir() */ | |
7b6d91da | 584 | bio->bi_rw |= REQ_WRITE; |
04dc1e88 | 585 | } |
06886a5a | 586 | |
5d952b83 BH |
587 | osd_req_write(or, &ios->obj, per_dev->offset, bio, |
588 | per_dev->length); | |
34ce4e7c BH |
589 | EXOFS_DBGMSG("write(0x%llx) offset=0x%llx " |
590 | "length=0x%llx dev=%d\n", | |
5d952b83 BH |
591 | _LLU(ios->obj.id), _LLU(per_dev->offset), |
592 | _LLU(per_dev->length), dev); | |
06886a5a | 593 | } else if (ios->kern_buff) { |
5d952b83 | 594 | ret = osd_req_write_kern(or, &ios->obj, per_dev->offset, |
06886a5a | 595 | ios->kern_buff, ios->length); |
5d952b83 BH |
596 | if (unlikely(ret)) |
597 | goto out; | |
34ce4e7c BH |
598 | EXOFS_DBGMSG2("write_kern(0x%llx) offset=0x%llx " |
599 | "length=0x%llx dev=%d\n", | |
5d952b83 BH |
600 | _LLU(ios->obj.id), _LLU(per_dev->offset), |
601 | _LLU(ios->length), dev); | |
06886a5a BH |
602 | } else { |
603 | osd_req_set_attributes(or, &ios->obj); | |
34ce4e7c | 604 | EXOFS_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", |
5d952b83 | 605 | _LLU(ios->obj.id), ios->out_attr_len, dev); |
06886a5a BH |
606 | } |
607 | ||
608 | if (ios->out_attr) | |
609 | osd_req_add_set_attr_list(or, ios->out_attr, | |
610 | ios->out_attr_len); | |
611 | ||
612 | if (ios->in_attr) | |
613 | osd_req_add_get_attr_list(or, ios->in_attr, | |
614 | ios->in_attr_len); | |
b14f8ab2 | 615 | } |
06886a5a BH |
616 | |
617 | out: | |
618 | return ret; | |
619 | } | |
620 | ||
5d952b83 BH |
621 | int exofs_sbi_write(struct exofs_io_state *ios) |
622 | { | |
623 | int i; | |
624 | int ret; | |
625 | ||
626 | ret = _prepare_for_striping(ios); | |
627 | if (unlikely(ret)) | |
628 | return ret; | |
629 | ||
630 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
631 | ret = _sbi_write_mirror(ios, i); | |
632 | if (unlikely(ret)) | |
633 | return ret; | |
634 | } | |
635 | ||
636 | ret = exofs_io_execute(ios); | |
637 | return ret; | |
638 | } | |
639 | ||
640 | static int _sbi_read_mirror(struct exofs_io_state *ios, unsigned cur_comp) | |
06886a5a | 641 | { |
46f4d973 | 642 | struct osd_request *or; |
5d952b83 | 643 | struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
46f4d973 | 644 | unsigned first_dev = (unsigned)ios->obj.id; |
06886a5a | 645 | |
50a76fd3 BH |
646 | if (ios->pages && !per_dev->length) |
647 | return 0; /* Just an empty slot */ | |
648 | ||
5d952b83 | 649 | first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; |
d9c740d2 | 650 | or = osd_start_request(exofs_ios_od(ios, first_dev), GFP_KERNEL); |
46f4d973 BH |
651 | if (unlikely(!or)) { |
652 | EXOFS_ERR("%s: osd_start_request failed\n", __func__); | |
653 | return -ENOMEM; | |
654 | } | |
655 | per_dev->or = or; | |
46f4d973 | 656 | |
86093aaf | 657 | if (ios->pages) { |
5d952b83 BH |
658 | osd_req_read(or, &ios->obj, per_dev->offset, |
659 | per_dev->bio, per_dev->length); | |
46f4d973 BH |
660 | EXOFS_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" |
661 | " dev=%d\n", _LLU(ios->obj.id), | |
5d952b83 | 662 | _LLU(per_dev->offset), _LLU(per_dev->length), |
46f4d973 BH |
663 | first_dev); |
664 | } else if (ios->kern_buff) { | |
5d952b83 | 665 | int ret = osd_req_read_kern(or, &ios->obj, per_dev->offset, |
46f4d973 | 666 | ios->kern_buff, ios->length); |
46f4d973 BH |
667 | EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx " |
668 | "length=0x%llx dev=%d ret=>%d\n", | |
5d952b83 | 669 | _LLU(ios->obj.id), _LLU(per_dev->offset), |
46f4d973 BH |
670 | _LLU(ios->length), first_dev, ret); |
671 | if (unlikely(ret)) | |
672 | return ret; | |
673 | } else { | |
674 | osd_req_get_attributes(or, &ios->obj); | |
675 | EXOFS_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", | |
676 | _LLU(ios->obj.id), ios->in_attr_len, first_dev); | |
677 | } | |
46f4d973 BH |
678 | if (ios->out_attr) |
679 | osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); | |
b14f8ab2 | 680 | |
46f4d973 BH |
681 | if (ios->in_attr) |
682 | osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); | |
b14f8ab2 | 683 | |
5d952b83 BH |
684 | return 0; |
685 | } | |
686 | ||
687 | int exofs_sbi_read(struct exofs_io_state *ios) | |
688 | { | |
689 | int i; | |
690 | int ret; | |
691 | ||
692 | ret = _prepare_for_striping(ios); | |
693 | if (unlikely(ret)) | |
694 | return ret; | |
695 | ||
696 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
697 | ret = _sbi_read_mirror(ios, i); | |
698 | if (unlikely(ret)) | |
699 | return ret; | |
700 | } | |
701 | ||
702 | ret = exofs_io_execute(ios); | |
703 | return ret; | |
b14f8ab2 BH |
704 | } |
705 | ||
06886a5a | 706 | int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr) |
b14f8ab2 BH |
707 | { |
708 | struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ | |
709 | void *iter = NULL; | |
710 | int nelem; | |
711 | ||
712 | do { | |
713 | nelem = 1; | |
06886a5a BH |
714 | osd_req_decode_get_attr_list(ios->per_dev[0].or, |
715 | &cur_attr, &nelem, &iter); | |
b14f8ab2 BH |
716 | if ((cur_attr.attr_page == attr->attr_page) && |
717 | (cur_attr.attr_id == attr->attr_id)) { | |
718 | attr->len = cur_attr.len; | |
719 | attr->val_ptr = cur_attr.val_ptr; | |
720 | return 0; | |
721 | } | |
722 | } while (iter); | |
723 | ||
724 | return -EIO; | |
725 | } | |
06886a5a | 726 | |
5d952b83 BH |
727 | static int _truncate_mirrors(struct exofs_io_state *ios, unsigned cur_comp, |
728 | struct osd_attr *attr) | |
729 | { | |
730 | int last_comp = cur_comp + ios->layout->mirrors_p1; | |
731 | ||
732 | for (; cur_comp < last_comp; ++cur_comp) { | |
733 | struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp]; | |
734 | struct osd_request *or; | |
735 | ||
736 | or = osd_start_request(exofs_ios_od(ios, cur_comp), GFP_KERNEL); | |
737 | if (unlikely(!or)) { | |
738 | EXOFS_ERR("%s: osd_start_request failed\n", __func__); | |
739 | return -ENOMEM; | |
740 | } | |
741 | per_dev->or = or; | |
742 | ||
743 | osd_req_set_attributes(or, &ios->obj); | |
744 | osd_req_add_set_attr_list(or, attr, 1); | |
745 | } | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
16f75bb3 BH |
750 | struct _trunc_info { |
751 | struct _striping_info si; | |
752 | u64 prev_group_obj_off; | |
753 | u64 next_group_obj_off; | |
754 | ||
755 | unsigned first_group_dev; | |
756 | unsigned nex_group_dev; | |
757 | unsigned max_devs; | |
758 | }; | |
759 | ||
760 | void _calc_trunk_info(struct exofs_layout *layout, u64 file_offset, | |
761 | struct _trunc_info *ti) | |
762 | { | |
763 | unsigned stripe_unit = layout->stripe_unit; | |
764 | ||
765 | _calc_stripe_info(layout, file_offset, &ti->si); | |
766 | ||
767 | ti->prev_group_obj_off = ti->si.M * stripe_unit; | |
768 | ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0; | |
769 | ||
770 | ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width); | |
771 | ti->nex_group_dev = ti->first_group_dev + layout->group_width; | |
772 | ti->max_devs = layout->group_width * layout->group_count; | |
773 | } | |
774 | ||
06886a5a BH |
775 | int exofs_oi_truncate(struct exofs_i_info *oi, u64 size) |
776 | { | |
777 | struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info; | |
778 | struct exofs_io_state *ios; | |
5d952b83 BH |
779 | struct exofs_trunc_attr { |
780 | struct osd_attr attr; | |
781 | __be64 newsize; | |
782 | } *size_attrs; | |
16f75bb3 | 783 | struct _trunc_info ti; |
06886a5a BH |
784 | int i, ret; |
785 | ||
5d952b83 BH |
786 | ret = exofs_get_io_state(&sbi->layout, &ios); |
787 | if (unlikely(ret)) | |
788 | return ret; | |
789 | ||
16f75bb3 BH |
790 | _calc_trunk_info(ios->layout, size, &ti); |
791 | ||
792 | size_attrs = kcalloc(ti.max_devs, sizeof(*size_attrs), | |
5d952b83 BH |
793 | GFP_KERNEL); |
794 | if (unlikely(!size_attrs)) { | |
795 | ret = -ENOMEM; | |
796 | goto out; | |
797 | } | |
06886a5a BH |
798 | |
799 | ios->obj.id = exofs_oi_objno(oi); | |
800 | ios->cred = oi->i_cred; | |
5d952b83 | 801 | ios->numdevs = ios->layout->s_numdevs; |
06886a5a | 802 | |
16f75bb3 | 803 | for (i = 0; i < ti.max_devs; ++i) { |
5d952b83 BH |
804 | struct exofs_trunc_attr *size_attr = &size_attrs[i]; |
805 | u64 obj_size; | |
06886a5a | 806 | |
16f75bb3 BH |
807 | if (i < ti.first_group_dev) |
808 | obj_size = ti.prev_group_obj_off; | |
809 | else if (i >= ti.nex_group_dev) | |
810 | obj_size = ti.next_group_obj_off; | |
811 | else if (i < ti.si.dev) /* dev within this group */ | |
812 | obj_size = ti.si.obj_offset + | |
813 | ios->layout->stripe_unit - ti.si.unit_off; | |
814 | else if (i == ti.si.dev) | |
815 | obj_size = ti.si.obj_offset; | |
816 | else /* i > ti.dev */ | |
817 | obj_size = ti.si.obj_offset - ti.si.unit_off; | |
06886a5a | 818 | |
5d952b83 BH |
819 | size_attr->newsize = cpu_to_be64(obj_size); |
820 | size_attr->attr = g_attr_logical_length; | |
821 | size_attr->attr.val_ptr = &size_attr->newsize; | |
822 | ||
16f75bb3 BH |
823 | EXOFS_DBGMSG("trunc(0x%llx) obj_offset=0x%llx dev=%d\n", |
824 | _LLU(ios->obj.id), _LLU(obj_size), i); | |
5d952b83 BH |
825 | ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, |
826 | &size_attr->attr); | |
827 | if (unlikely(ret)) | |
828 | goto out; | |
06886a5a BH |
829 | } |
830 | ret = exofs_io_execute(ios); | |
831 | ||
832 | out: | |
5d952b83 | 833 | kfree(size_attrs); |
06886a5a BH |
834 | exofs_put_io_state(ios); |
835 | return ret; | |
836 | } |