]>
Commit | Line | Data |
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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 | ||
b916c5cd BH |
50 | static void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset, |
51 | struct ore_striping_info *si); | |
52 | ||
8ff660ab | 53 | static u8 *_ios_cred(struct ore_io_state *ios, unsigned index) |
9e9db456 | 54 | { |
5bf696da | 55 | return ios->oc->comps[index & ios->oc->single_comp].cred; |
9e9db456 BH |
56 | } |
57 | ||
8ff660ab | 58 | static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index) |
9e9db456 | 59 | { |
5bf696da | 60 | return &ios->oc->comps[index & ios->oc->single_comp].obj; |
9e9db456 BH |
61 | } |
62 | ||
8ff660ab | 63 | static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index) |
9e9db456 | 64 | { |
3bd98568 BH |
65 | ORE_DBGMSG2("oc->first_dev=%d oc->numdevs=%d i=%d oc->ods=%p\n", |
66 | ios->oc->first_dev, ios->oc->numdevs, index, | |
67 | ios->oc->ods); | |
68 | ||
d866d875 | 69 | return ore_comp_dev(ios->oc, index); |
9e9db456 BH |
70 | } |
71 | ||
b916c5cd BH |
72 | static int _get_io_state(struct ore_layout *layout, |
73 | struct ore_components *oc, unsigned numdevs, | |
74 | struct ore_io_state **pios) | |
b14f8ab2 | 75 | { |
8ff660ab | 76 | struct ore_io_state *ios; |
06886a5a BH |
77 | |
78 | /*TODO: Maybe use kmem_cach per sbi of size | |
45d3abcb | 79 | * exofs_io_state_size(layout->s_numdevs) |
06886a5a | 80 | */ |
b916c5cd | 81 | ios = kzalloc(ore_io_state_size(numdevs), GFP_KERNEL); |
06886a5a | 82 | if (unlikely(!ios)) { |
8ff660ab | 83 | ORE_DBGMSG("Failed kzalloc bytes=%d\n", |
b916c5cd | 84 | ore_io_state_size(numdevs)); |
06886a5a BH |
85 | *pios = NULL; |
86 | return -ENOMEM; | |
87 | } | |
88 | ||
45d3abcb | 89 | ios->layout = layout; |
5bf696da | 90 | ios->oc = oc; |
b916c5cd BH |
91 | *pios = ios; |
92 | return 0; | |
93 | } | |
94 | ||
95 | /* Allocate an io_state for only a single group of devices | |
96 | * | |
97 | * If a user needs to call ore_read/write() this version must be used becase it | |
98 | * allocates extra stuff for striping and raid. | |
99 | * The ore might decide to only IO less then @length bytes do to alignmets | |
100 | * and constrains as follows: | |
101 | * - The IO cannot cross group boundary. | |
102 | * - In raid5/6 The end of the IO must align at end of a stripe eg. | |
103 | * (@offset + @length) % strip_size == 0. Or the complete range is within a | |
104 | * single stripe. | |
105 | * - Memory condition only permitted a shorter IO. (A user can use @length=~0 | |
106 | * And check the returned ios->length for max_io_size.) | |
107 | * | |
108 | * The caller must check returned ios->length (and/or ios->nr_pages) and | |
109 | * re-issue these pages that fall outside of ios->length | |
110 | */ | |
111 | int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc, | |
112 | bool is_reading, u64 offset, u64 length, | |
113 | struct ore_io_state **pios) | |
114 | { | |
115 | struct ore_io_state *ios; | |
116 | unsigned numdevs = layout->group_width * layout->mirrors_p1; | |
117 | int ret; | |
118 | ||
119 | ret = _get_io_state(layout, oc, numdevs, pios); | |
120 | if (unlikely(ret)) | |
121 | return ret; | |
122 | ||
123 | ios = *pios; | |
e1042ba0 | 124 | ios->reading = is_reading; |
b916c5cd BH |
125 | ios->offset = offset; |
126 | ||
127 | if (length) { | |
98260754 BH |
128 | ore_calc_stripe_info(layout, offset, &ios->si); |
129 | ios->length = (length <= ios->si.group_length) ? length : | |
130 | ios->si.group_length; | |
b916c5cd BH |
131 | ios->nr_pages = (ios->length + PAGE_SIZE - 1) / PAGE_SIZE; |
132 | } | |
e1042ba0 | 133 | |
06886a5a | 134 | return 0; |
b14f8ab2 | 135 | } |
cf283ade | 136 | EXPORT_SYMBOL(ore_get_rw_state); |
b14f8ab2 | 137 | |
b916c5cd BH |
138 | /* Allocate an io_state for all the devices in the comps array |
139 | * | |
140 | * This version of io_state allocation is used mostly by create/remove | |
141 | * and trunc where we currently need all the devices. The only wastful | |
142 | * bit is the read/write_attributes with no IO. Those sites should | |
143 | * be converted to use ore_get_rw_state() with length=0 | |
144 | */ | |
5bf696da | 145 | int ore_get_io_state(struct ore_layout *layout, struct ore_components *oc, |
b916c5cd | 146 | struct ore_io_state **pios) |
e1042ba0 | 147 | { |
b916c5cd | 148 | return _get_io_state(layout, oc, oc->numdevs, pios); |
e1042ba0 | 149 | } |
cf283ade | 150 | EXPORT_SYMBOL(ore_get_io_state); |
e1042ba0 | 151 | |
8ff660ab | 152 | void ore_put_io_state(struct ore_io_state *ios) |
b14f8ab2 | 153 | { |
06886a5a BH |
154 | if (ios) { |
155 | unsigned i; | |
b14f8ab2 | 156 | |
06886a5a | 157 | for (i = 0; i < ios->numdevs; i++) { |
8ff660ab | 158 | struct ore_per_dev_state *per_dev = &ios->per_dev[i]; |
06886a5a BH |
159 | |
160 | if (per_dev->or) | |
161 | osd_end_request(per_dev->or); | |
162 | if (per_dev->bio) | |
163 | bio_put(per_dev->bio); | |
164 | } | |
165 | ||
166 | kfree(ios); | |
b14f8ab2 | 167 | } |
06886a5a | 168 | } |
cf283ade | 169 | EXPORT_SYMBOL(ore_put_io_state); |
b14f8ab2 | 170 | |
8ff660ab | 171 | static void _sync_done(struct ore_io_state *ios, void *p) |
06886a5a BH |
172 | { |
173 | struct completion *waiting = p; | |
b14f8ab2 | 174 | |
06886a5a BH |
175 | complete(waiting); |
176 | } | |
177 | ||
178 | static void _last_io(struct kref *kref) | |
179 | { | |
8ff660ab BH |
180 | struct ore_io_state *ios = container_of( |
181 | kref, struct ore_io_state, kref); | |
06886a5a BH |
182 | |
183 | ios->done(ios, ios->private); | |
184 | } | |
185 | ||
186 | static void _done_io(struct osd_request *or, void *p) | |
187 | { | |
8ff660ab | 188 | struct ore_io_state *ios = p; |
06886a5a BH |
189 | |
190 | kref_put(&ios->kref, _last_io); | |
191 | } | |
192 | ||
8ff660ab | 193 | static int ore_io_execute(struct ore_io_state *ios) |
06886a5a BH |
194 | { |
195 | DECLARE_COMPLETION_ONSTACK(wait); | |
196 | bool sync = (ios->done == NULL); | |
197 | int i, ret; | |
198 | ||
199 | if (sync) { | |
200 | ios->done = _sync_done; | |
201 | ios->private = &wait; | |
202 | } | |
203 | ||
204 | for (i = 0; i < ios->numdevs; i++) { | |
205 | struct osd_request *or = ios->per_dev[i].or; | |
206 | if (unlikely(!or)) | |
207 | continue; | |
208 | ||
9e9db456 | 209 | ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL); |
06886a5a | 210 | if (unlikely(ret)) { |
8ff660ab | 211 | ORE_DBGMSG("Failed to osd_finalize_request() => %d\n", |
06886a5a BH |
212 | ret); |
213 | return ret; | |
214 | } | |
215 | } | |
216 | ||
217 | kref_init(&ios->kref); | |
218 | ||
219 | for (i = 0; i < ios->numdevs; i++) { | |
220 | struct osd_request *or = ios->per_dev[i].or; | |
221 | if (unlikely(!or)) | |
222 | continue; | |
223 | ||
224 | kref_get(&ios->kref); | |
225 | osd_execute_request_async(or, _done_io, ios); | |
226 | } | |
227 | ||
228 | kref_put(&ios->kref, _last_io); | |
229 | ret = 0; | |
230 | ||
231 | if (sync) { | |
232 | wait_for_completion(&wait); | |
8ff660ab | 233 | ret = ore_check_io(ios, NULL); |
06886a5a | 234 | } |
b14f8ab2 BH |
235 | return ret; |
236 | } | |
237 | ||
22ddc556 BH |
238 | static void _clear_bio(struct bio *bio) |
239 | { | |
240 | struct bio_vec *bv; | |
241 | unsigned i; | |
242 | ||
243 | __bio_for_each_segment(bv, bio, i, 0) { | |
244 | unsigned this_count = bv->bv_len; | |
245 | ||
246 | if (likely(PAGE_SIZE == this_count)) | |
247 | clear_highpage(bv->bv_page); | |
248 | else | |
249 | zero_user(bv->bv_page, bv->bv_offset, this_count); | |
250 | } | |
251 | } | |
252 | ||
8ff660ab | 253 | int ore_check_io(struct ore_io_state *ios, u64 *resid) |
b14f8ab2 | 254 | { |
06886a5a BH |
255 | enum osd_err_priority acumulated_osd_err = 0; |
256 | int acumulated_lin_err = 0; | |
257 | int i; | |
b14f8ab2 | 258 | |
06886a5a BH |
259 | for (i = 0; i < ios->numdevs; i++) { |
260 | struct osd_sense_info osi; | |
22ddc556 BH |
261 | struct osd_request *or = ios->per_dev[i].or; |
262 | int ret; | |
263 | ||
264 | if (unlikely(!or)) | |
265 | continue; | |
06886a5a | 266 | |
22ddc556 | 267 | ret = osd_req_decode_sense(or, &osi); |
06886a5a BH |
268 | if (likely(!ret)) |
269 | continue; | |
270 | ||
22ddc556 BH |
271 | if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) { |
272 | /* start read offset passed endof file */ | |
273 | _clear_bio(ios->per_dev[i].bio); | |
8ff660ab | 274 | ORE_DBGMSG("start read offset passed end of file " |
22ddc556 | 275 | "offset=0x%llx, length=0x%llx\n", |
5d952b83 BH |
276 | _LLU(ios->per_dev[i].offset), |
277 | _LLU(ios->per_dev[i].length)); | |
22ddc556 BH |
278 | |
279 | continue; /* we recovered */ | |
06886a5a BH |
280 | } |
281 | ||
282 | if (osi.osd_err_pri >= acumulated_osd_err) { | |
283 | acumulated_osd_err = osi.osd_err_pri; | |
284 | acumulated_lin_err = ret; | |
285 | } | |
286 | } | |
287 | ||
288 | /* TODO: raid specific residual calculations */ | |
289 | if (resid) { | |
290 | if (likely(!acumulated_lin_err)) | |
291 | *resid = 0; | |
292 | else | |
293 | *resid = ios->length; | |
294 | } | |
295 | ||
296 | return acumulated_lin_err; | |
297 | } | |
cf283ade | 298 | EXPORT_SYMBOL(ore_check_io); |
06886a5a | 299 | |
b367e78b BH |
300 | /* |
301 | * L - logical offset into the file | |
302 | * | |
50a76fd3 | 303 | * U - The number of bytes in a stripe within a group |
b367e78b BH |
304 | * |
305 | * U = stripe_unit * group_width | |
306 | * | |
50a76fd3 BH |
307 | * T - The number of bytes striped within a group of component objects |
308 | * (before advancing to the next group) | |
b367e78b | 309 | * |
50a76fd3 BH |
310 | * T = stripe_unit * group_width * group_depth |
311 | * | |
312 | * S - The number of bytes striped across all component objects | |
313 | * before the pattern repeats | |
314 | * | |
315 | * S = stripe_unit * group_width * group_depth * group_count | |
316 | * | |
317 | * M - The "major" (i.e., across all components) stripe number | |
318 | * | |
319 | * M = L / S | |
320 | * | |
321 | * G - Counts the groups from the beginning of the major stripe | |
322 | * | |
323 | * G = (L - (M * S)) / T [or (L % S) / T] | |
324 | * | |
325 | * H - The byte offset within the group | |
326 | * | |
327 | * H = (L - (M * S)) % T [or (L % S) % T] | |
328 | * | |
329 | * N - The "minor" (i.e., across the group) stripe number | |
330 | * | |
331 | * N = H / U | |
b367e78b BH |
332 | * |
333 | * C - The component index coresponding to L | |
334 | * | |
50a76fd3 BH |
335 | * C = (H - (N * U)) / stripe_unit + G * group_width |
336 | * [or (L % U) / stripe_unit + G * group_width] | |
b367e78b BH |
337 | * |
338 | * O - The component offset coresponding to L | |
339 | * | |
50a76fd3 | 340 | * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit |
b367e78b | 341 | */ |
eb507bc1 BH |
342 | static void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset, |
343 | struct ore_striping_info *si) | |
5d952b83 | 344 | { |
16f75bb3 BH |
345 | u32 stripe_unit = layout->stripe_unit; |
346 | u32 group_width = layout->group_width; | |
347 | u64 group_depth = layout->group_depth; | |
50a76fd3 | 348 | |
b367e78b | 349 | u32 U = stripe_unit * group_width; |
50a76fd3 | 350 | u64 T = U * group_depth; |
16f75bb3 | 351 | u64 S = T * layout->group_count; |
50a76fd3 BH |
352 | u64 M = div64_u64(file_offset, S); |
353 | ||
354 | /* | |
355 | G = (L - (M * S)) / T | |
356 | H = (L - (M * S)) % T | |
357 | */ | |
358 | u64 LmodS = file_offset - M * S; | |
359 | u32 G = div64_u64(LmodS, T); | |
360 | u64 H = LmodS - G * T; | |
361 | ||
362 | u32 N = div_u64(H, U); | |
363 | ||
364 | /* "H - (N * U)" is just "H % U" so it's bound to u32 */ | |
365 | si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width; | |
16f75bb3 | 366 | si->dev *= layout->mirrors_p1; |
b367e78b | 367 | |
50a76fd3 | 368 | div_u64_rem(file_offset, stripe_unit, &si->unit_off); |
5d952b83 | 369 | |
50a76fd3 BH |
370 | si->obj_offset = si->unit_off + (N * stripe_unit) + |
371 | (M * group_depth * stripe_unit); | |
372 | ||
373 | si->group_length = T - H; | |
16f75bb3 | 374 | si->M = M; |
5d952b83 BH |
375 | } |
376 | ||
8ff660ab BH |
377 | static int _add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg, |
378 | unsigned pgbase, struct ore_per_dev_state *per_dev, | |
86093aaf | 379 | int cur_len) |
5d952b83 | 380 | { |
86093aaf | 381 | unsigned pg = *cur_pg; |
5d952b83 | 382 | struct request_queue *q = |
9e9db456 | 383 | osd_request_queue(_ios_od(ios, per_dev->dev)); |
bbf9a31b BH |
384 | unsigned len = cur_len; |
385 | int ret; | |
5d952b83 BH |
386 | |
387 | if (per_dev->bio == NULL) { | |
388 | unsigned pages_in_stripe = ios->layout->group_width * | |
389 | (ios->layout->stripe_unit / PAGE_SIZE); | |
86093aaf | 390 | unsigned bio_size = (ios->nr_pages + pages_in_stripe) / |
5d952b83 BH |
391 | ios->layout->group_width; |
392 | ||
393 | per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); | |
394 | if (unlikely(!per_dev->bio)) { | |
8ff660ab | 395 | ORE_DBGMSG("Failed to allocate BIO size=%u\n", |
5d952b83 | 396 | bio_size); |
bbf9a31b BH |
397 | ret = -ENOMEM; |
398 | goto out; | |
5d952b83 BH |
399 | } |
400 | } | |
401 | ||
402 | while (cur_len > 0) { | |
86093aaf BH |
403 | unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); |
404 | unsigned added_len; | |
5d952b83 | 405 | |
86093aaf BH |
406 | BUG_ON(ios->nr_pages <= pg); |
407 | cur_len -= pglen; | |
5d952b83 | 408 | |
86093aaf BH |
409 | added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg], |
410 | pglen, pgbase); | |
bbf9a31b BH |
411 | if (unlikely(pglen != added_len)) { |
412 | ret = -ENOMEM; | |
413 | goto out; | |
414 | } | |
86093aaf BH |
415 | pgbase = 0; |
416 | ++pg; | |
5d952b83 BH |
417 | } |
418 | BUG_ON(cur_len); | |
419 | ||
bbf9a31b | 420 | per_dev->length += len; |
86093aaf | 421 | *cur_pg = pg; |
bbf9a31b BH |
422 | ret = 0; |
423 | out: /* we fail the complete unit on an error eg don't advance | |
424 | * per_dev->length and cur_pg. This means that we might have a bigger | |
425 | * bio than the CDB requested length (per_dev->length). That's fine | |
426 | * only the oposite is fatal. | |
427 | */ | |
428 | return ret; | |
5d952b83 BH |
429 | } |
430 | ||
98260754 | 431 | static int _prepare_for_striping(struct ore_io_state *ios) |
5d952b83 | 432 | { |
98260754 | 433 | struct ore_striping_info *si = &ios->si; |
5d952b83 | 434 | unsigned stripe_unit = ios->layout->stripe_unit; |
b367e78b | 435 | unsigned mirrors_p1 = ios->layout->mirrors_p1; |
50a76fd3 | 436 | unsigned devs_in_group = ios->layout->group_width * mirrors_p1; |
b367e78b | 437 | unsigned dev = si->dev; |
50a76fd3 | 438 | unsigned first_dev = dev - (dev % devs_in_group); |
50a76fd3 | 439 | unsigned cur_pg = ios->pages_consumed; |
98260754 | 440 | u64 length = ios->length; |
86093aaf | 441 | int ret = 0; |
5d952b83 | 442 | |
98260754 | 443 | if (!ios->pages) { |
98260754 BH |
444 | ios->numdevs = ios->layout->mirrors_p1; |
445 | return 0; | |
446 | } | |
447 | ||
448 | BUG_ON(length > si->group_length); | |
449 | ||
5d952b83 | 450 | while (length) { |
b916c5cd BH |
451 | unsigned comp = dev - first_dev; |
452 | struct ore_per_dev_state *per_dev = &ios->per_dev[comp]; | |
b367e78b | 453 | unsigned cur_len, page_off = 0; |
5d952b83 BH |
454 | |
455 | if (!per_dev->length) { | |
b367e78b BH |
456 | per_dev->dev = dev; |
457 | if (dev < si->dev) { | |
458 | per_dev->offset = si->obj_offset + stripe_unit - | |
459 | si->unit_off; | |
460 | cur_len = stripe_unit; | |
461 | } else if (dev == si->dev) { | |
462 | per_dev->offset = si->obj_offset; | |
463 | cur_len = stripe_unit - si->unit_off; | |
464 | page_off = si->unit_off & ~PAGE_MASK; | |
465 | BUG_ON(page_off && (page_off != ios->pgbase)); | |
466 | } else { /* dev > si->dev */ | |
467 | per_dev->offset = si->obj_offset - si->unit_off; | |
468 | cur_len = stripe_unit; | |
469 | } | |
5d952b83 | 470 | } else { |
b367e78b | 471 | cur_len = stripe_unit; |
5d952b83 | 472 | } |
b367e78b BH |
473 | if (cur_len >= length) |
474 | cur_len = length; | |
5d952b83 | 475 | |
86093aaf BH |
476 | ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev, |
477 | cur_len); | |
5d952b83 BH |
478 | if (unlikely(ret)) |
479 | goto out; | |
480 | ||
6e31609b BH |
481 | dev += mirrors_p1; |
482 | dev = (dev % devs_in_group) + first_dev; | |
5d952b83 BH |
483 | |
484 | length -= cur_len; | |
485 | } | |
486 | out: | |
b916c5cd | 487 | ios->numdevs = devs_in_group; |
50a76fd3 | 488 | ios->pages_consumed = cur_pg; |
bbf9a31b BH |
489 | if (unlikely(ret)) { |
490 | if (length == ios->length) | |
491 | return ret; | |
492 | else | |
493 | ios->length -= length; | |
494 | } | |
495 | return 0; | |
5d952b83 BH |
496 | } |
497 | ||
8ff660ab | 498 | int ore_create(struct ore_io_state *ios) |
06886a5a BH |
499 | { |
500 | int i, ret; | |
501 | ||
5bf696da | 502 | for (i = 0; i < ios->oc->numdevs; i++) { |
06886a5a BH |
503 | struct osd_request *or; |
504 | ||
9e9db456 | 505 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
06886a5a | 506 | if (unlikely(!or)) { |
8ff660ab | 507 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
508 | ret = -ENOMEM; |
509 | goto out; | |
510 | } | |
511 | ios->per_dev[i].or = or; | |
512 | ios->numdevs++; | |
513 | ||
9e9db456 | 514 | osd_req_create_object(or, _ios_obj(ios, i)); |
06886a5a | 515 | } |
8ff660ab | 516 | ret = ore_io_execute(ios); |
06886a5a BH |
517 | |
518 | out: | |
519 | return ret; | |
520 | } | |
cf283ade | 521 | EXPORT_SYMBOL(ore_create); |
06886a5a | 522 | |
8ff660ab | 523 | int ore_remove(struct ore_io_state *ios) |
06886a5a BH |
524 | { |
525 | int i, ret; | |
526 | ||
5bf696da | 527 | for (i = 0; i < ios->oc->numdevs; i++) { |
06886a5a BH |
528 | struct osd_request *or; |
529 | ||
9e9db456 | 530 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
06886a5a | 531 | if (unlikely(!or)) { |
8ff660ab | 532 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
533 | ret = -ENOMEM; |
534 | goto out; | |
535 | } | |
536 | ios->per_dev[i].or = or; | |
537 | ios->numdevs++; | |
538 | ||
9e9db456 | 539 | osd_req_remove_object(or, _ios_obj(ios, i)); |
06886a5a | 540 | } |
8ff660ab | 541 | ret = ore_io_execute(ios); |
06886a5a BH |
542 | |
543 | out: | |
544 | return ret; | |
545 | } | |
cf283ade | 546 | EXPORT_SYMBOL(ore_remove); |
06886a5a | 547 | |
8ff660ab | 548 | static int _write_mirror(struct ore_io_state *ios, int cur_comp) |
06886a5a | 549 | { |
8ff660ab | 550 | struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp]; |
5d952b83 BH |
551 | unsigned dev = ios->per_dev[cur_comp].dev; |
552 | unsigned last_comp = cur_comp + ios->layout->mirrors_p1; | |
553 | int ret = 0; | |
06886a5a | 554 | |
50a76fd3 BH |
555 | if (ios->pages && !master_dev->length) |
556 | return 0; /* Just an empty slot */ | |
557 | ||
5d952b83 | 558 | for (; cur_comp < last_comp; ++cur_comp, ++dev) { |
8ff660ab | 559 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
06886a5a BH |
560 | struct osd_request *or; |
561 | ||
9e9db456 | 562 | or = osd_start_request(_ios_od(ios, dev), GFP_KERNEL); |
06886a5a | 563 | if (unlikely(!or)) { |
8ff660ab | 564 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
565 | ret = -ENOMEM; |
566 | goto out; | |
567 | } | |
5d952b83 | 568 | per_dev->or = or; |
06886a5a | 569 | |
86093aaf | 570 | if (ios->pages) { |
06886a5a BH |
571 | struct bio *bio; |
572 | ||
5d952b83 | 573 | if (per_dev != master_dev) { |
04dc1e88 | 574 | bio = bio_kmalloc(GFP_KERNEL, |
5d952b83 | 575 | master_dev->bio->bi_max_vecs); |
04dc1e88 | 576 | if (unlikely(!bio)) { |
8ff660ab | 577 | ORE_DBGMSG( |
426d3107 | 578 | "Failed to allocate BIO size=%u\n", |
5d952b83 | 579 | master_dev->bio->bi_max_vecs); |
04dc1e88 BH |
580 | ret = -ENOMEM; |
581 | goto out; | |
582 | } | |
583 | ||
5d952b83 | 584 | __bio_clone(bio, master_dev->bio); |
04dc1e88 BH |
585 | bio->bi_bdev = NULL; |
586 | bio->bi_next = NULL; | |
6851a5e5 | 587 | per_dev->offset = master_dev->offset; |
5d952b83 BH |
588 | per_dev->length = master_dev->length; |
589 | per_dev->bio = bio; | |
590 | per_dev->dev = dev; | |
04dc1e88 | 591 | } else { |
5d952b83 BH |
592 | bio = master_dev->bio; |
593 | /* FIXME: bio_set_dir() */ | |
7b6d91da | 594 | bio->bi_rw |= REQ_WRITE; |
04dc1e88 | 595 | } |
06886a5a | 596 | |
9e9db456 BH |
597 | osd_req_write(or, _ios_obj(ios, dev), per_dev->offset, |
598 | bio, per_dev->length); | |
8ff660ab | 599 | ORE_DBGMSG("write(0x%llx) offset=0x%llx " |
34ce4e7c | 600 | "length=0x%llx dev=%d\n", |
9e9db456 BH |
601 | _LLU(_ios_obj(ios, dev)->id), |
602 | _LLU(per_dev->offset), | |
5d952b83 | 603 | _LLU(per_dev->length), dev); |
06886a5a | 604 | } else if (ios->kern_buff) { |
6851a5e5 BH |
605 | per_dev->offset = ios->si.obj_offset; |
606 | per_dev->dev = ios->si.dev + dev; | |
607 | ||
608 | /* no cross device without page array */ | |
609 | BUG_ON((ios->layout->group_width > 1) && | |
610 | (ios->si.unit_off + ios->length > | |
611 | ios->layout->stripe_unit)); | |
612 | ||
613 | ret = osd_req_write_kern(or, _ios_obj(ios, per_dev->dev), | |
9e9db456 BH |
614 | per_dev->offset, |
615 | ios->kern_buff, ios->length); | |
5d952b83 BH |
616 | if (unlikely(ret)) |
617 | goto out; | |
8ff660ab | 618 | ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx " |
34ce4e7c | 619 | "length=0x%llx dev=%d\n", |
9e9db456 BH |
620 | _LLU(_ios_obj(ios, dev)->id), |
621 | _LLU(per_dev->offset), | |
6851a5e5 | 622 | _LLU(ios->length), per_dev->dev); |
06886a5a | 623 | } else { |
9e9db456 | 624 | osd_req_set_attributes(or, _ios_obj(ios, dev)); |
8ff660ab | 625 | ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", |
9e9db456 BH |
626 | _LLU(_ios_obj(ios, dev)->id), |
627 | ios->out_attr_len, dev); | |
06886a5a BH |
628 | } |
629 | ||
630 | if (ios->out_attr) | |
631 | osd_req_add_set_attr_list(or, ios->out_attr, | |
632 | ios->out_attr_len); | |
633 | ||
634 | if (ios->in_attr) | |
635 | osd_req_add_get_attr_list(or, ios->in_attr, | |
636 | ios->in_attr_len); | |
b14f8ab2 | 637 | } |
06886a5a BH |
638 | |
639 | out: | |
640 | return ret; | |
641 | } | |
642 | ||
8ff660ab | 643 | int ore_write(struct ore_io_state *ios) |
5d952b83 BH |
644 | { |
645 | int i; | |
646 | int ret; | |
647 | ||
648 | ret = _prepare_for_striping(ios); | |
649 | if (unlikely(ret)) | |
650 | return ret; | |
651 | ||
652 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
8ff660ab | 653 | ret = _write_mirror(ios, i); |
5d952b83 BH |
654 | if (unlikely(ret)) |
655 | return ret; | |
656 | } | |
657 | ||
8ff660ab | 658 | ret = ore_io_execute(ios); |
5d952b83 BH |
659 | return ret; |
660 | } | |
cf283ade | 661 | EXPORT_SYMBOL(ore_write); |
5d952b83 | 662 | |
8ff660ab | 663 | static int _read_mirror(struct ore_io_state *ios, unsigned cur_comp) |
06886a5a | 664 | { |
46f4d973 | 665 | struct osd_request *or; |
8ff660ab | 666 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
9e9db456 BH |
667 | struct osd_obj_id *obj = _ios_obj(ios, cur_comp); |
668 | unsigned first_dev = (unsigned)obj->id; | |
06886a5a | 669 | |
50a76fd3 BH |
670 | if (ios->pages && !per_dev->length) |
671 | return 0; /* Just an empty slot */ | |
672 | ||
5d952b83 | 673 | first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; |
9e9db456 | 674 | or = osd_start_request(_ios_od(ios, first_dev), GFP_KERNEL); |
46f4d973 | 675 | if (unlikely(!or)) { |
8ff660ab | 676 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
46f4d973 BH |
677 | return -ENOMEM; |
678 | } | |
679 | per_dev->or = or; | |
46f4d973 | 680 | |
86093aaf | 681 | if (ios->pages) { |
9e9db456 | 682 | osd_req_read(or, obj, per_dev->offset, |
5d952b83 | 683 | per_dev->bio, per_dev->length); |
8ff660ab | 684 | ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" |
9e9db456 | 685 | " dev=%d\n", _LLU(obj->id), |
5d952b83 | 686 | _LLU(per_dev->offset), _LLU(per_dev->length), |
46f4d973 | 687 | first_dev); |
46f4d973 | 688 | } else { |
6851a5e5 BH |
689 | BUG_ON(ios->kern_buff); |
690 | ||
9e9db456 | 691 | osd_req_get_attributes(or, obj); |
8ff660ab | 692 | ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", |
9e9db456 BH |
693 | _LLU(obj->id), |
694 | ios->in_attr_len, first_dev); | |
46f4d973 | 695 | } |
46f4d973 BH |
696 | if (ios->out_attr) |
697 | osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); | |
b14f8ab2 | 698 | |
46f4d973 BH |
699 | if (ios->in_attr) |
700 | osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); | |
b14f8ab2 | 701 | |
5d952b83 BH |
702 | return 0; |
703 | } | |
704 | ||
8ff660ab | 705 | int ore_read(struct ore_io_state *ios) |
5d952b83 BH |
706 | { |
707 | int i; | |
708 | int ret; | |
709 | ||
710 | ret = _prepare_for_striping(ios); | |
711 | if (unlikely(ret)) | |
712 | return ret; | |
713 | ||
714 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
8ff660ab | 715 | ret = _read_mirror(ios, i); |
5d952b83 BH |
716 | if (unlikely(ret)) |
717 | return ret; | |
718 | } | |
719 | ||
8ff660ab | 720 | ret = ore_io_execute(ios); |
5d952b83 | 721 | return ret; |
b14f8ab2 | 722 | } |
cf283ade | 723 | EXPORT_SYMBOL(ore_read); |
b14f8ab2 | 724 | |
8ff660ab | 725 | int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr) |
b14f8ab2 BH |
726 | { |
727 | struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ | |
728 | void *iter = NULL; | |
729 | int nelem; | |
730 | ||
731 | do { | |
732 | nelem = 1; | |
06886a5a BH |
733 | osd_req_decode_get_attr_list(ios->per_dev[0].or, |
734 | &cur_attr, &nelem, &iter); | |
b14f8ab2 BH |
735 | if ((cur_attr.attr_page == attr->attr_page) && |
736 | (cur_attr.attr_id == attr->attr_id)) { | |
737 | attr->len = cur_attr.len; | |
738 | attr->val_ptr = cur_attr.val_ptr; | |
739 | return 0; | |
740 | } | |
741 | } while (iter); | |
742 | ||
743 | return -EIO; | |
744 | } | |
cf283ade | 745 | EXPORT_SYMBOL(extract_attr_from_ios); |
06886a5a | 746 | |
8ff660ab | 747 | static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp, |
5d952b83 BH |
748 | struct osd_attr *attr) |
749 | { | |
750 | int last_comp = cur_comp + ios->layout->mirrors_p1; | |
751 | ||
752 | for (; cur_comp < last_comp; ++cur_comp) { | |
8ff660ab | 753 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
5d952b83 BH |
754 | struct osd_request *or; |
755 | ||
9e9db456 | 756 | or = osd_start_request(_ios_od(ios, cur_comp), GFP_KERNEL); |
5d952b83 | 757 | if (unlikely(!or)) { |
8ff660ab | 758 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
5d952b83 BH |
759 | return -ENOMEM; |
760 | } | |
761 | per_dev->or = or; | |
762 | ||
9e9db456 | 763 | osd_req_set_attributes(or, _ios_obj(ios, cur_comp)); |
5d952b83 BH |
764 | osd_req_add_set_attr_list(or, attr, 1); |
765 | } | |
766 | ||
767 | return 0; | |
768 | } | |
769 | ||
16f75bb3 | 770 | struct _trunc_info { |
eb507bc1 | 771 | struct ore_striping_info si; |
16f75bb3 BH |
772 | u64 prev_group_obj_off; |
773 | u64 next_group_obj_off; | |
774 | ||
775 | unsigned first_group_dev; | |
776 | unsigned nex_group_dev; | |
16f75bb3 BH |
777 | }; |
778 | ||
1958c7c2 HS |
779 | static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset, |
780 | struct _trunc_info *ti) | |
16f75bb3 BH |
781 | { |
782 | unsigned stripe_unit = layout->stripe_unit; | |
783 | ||
eb507bc1 | 784 | ore_calc_stripe_info(layout, file_offset, &ti->si); |
16f75bb3 BH |
785 | |
786 | ti->prev_group_obj_off = ti->si.M * stripe_unit; | |
787 | ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0; | |
788 | ||
789 | ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width); | |
790 | ti->nex_group_dev = ti->first_group_dev + layout->group_width; | |
16f75bb3 BH |
791 | } |
792 | ||
5bf696da | 793 | int ore_truncate(struct ore_layout *layout, struct ore_components *oc, |
9e9db456 | 794 | u64 size) |
06886a5a | 795 | { |
8ff660ab | 796 | struct ore_io_state *ios; |
5d952b83 BH |
797 | struct exofs_trunc_attr { |
798 | struct osd_attr attr; | |
799 | __be64 newsize; | |
800 | } *size_attrs; | |
16f75bb3 | 801 | struct _trunc_info ti; |
06886a5a BH |
802 | int i, ret; |
803 | ||
5bf696da | 804 | ret = ore_get_io_state(layout, oc, &ios); |
5d952b83 BH |
805 | if (unlikely(ret)) |
806 | return ret; | |
807 | ||
16f75bb3 BH |
808 | _calc_trunk_info(ios->layout, size, &ti); |
809 | ||
b916c5cd | 810 | size_attrs = kcalloc(ios->oc->numdevs, sizeof(*size_attrs), |
5d952b83 BH |
811 | GFP_KERNEL); |
812 | if (unlikely(!size_attrs)) { | |
813 | ret = -ENOMEM; | |
814 | goto out; | |
815 | } | |
06886a5a | 816 | |
5bf696da | 817 | ios->numdevs = ios->oc->numdevs; |
06886a5a | 818 | |
b916c5cd | 819 | for (i = 0; i < ios->numdevs; ++i) { |
5d952b83 BH |
820 | struct exofs_trunc_attr *size_attr = &size_attrs[i]; |
821 | u64 obj_size; | |
06886a5a | 822 | |
16f75bb3 BH |
823 | if (i < ti.first_group_dev) |
824 | obj_size = ti.prev_group_obj_off; | |
825 | else if (i >= ti.nex_group_dev) | |
826 | obj_size = ti.next_group_obj_off; | |
827 | else if (i < ti.si.dev) /* dev within this group */ | |
828 | obj_size = ti.si.obj_offset + | |
829 | ios->layout->stripe_unit - ti.si.unit_off; | |
830 | else if (i == ti.si.dev) | |
831 | obj_size = ti.si.obj_offset; | |
832 | else /* i > ti.dev */ | |
833 | obj_size = ti.si.obj_offset - ti.si.unit_off; | |
06886a5a | 834 | |
5d952b83 BH |
835 | size_attr->newsize = cpu_to_be64(obj_size); |
836 | size_attr->attr = g_attr_logical_length; | |
837 | size_attr->attr.val_ptr = &size_attr->newsize; | |
838 | ||
8ff660ab | 839 | ORE_DBGMSG("trunc(0x%llx) obj_offset=0x%llx dev=%d\n", |
5bf696da | 840 | _LLU(oc->comps->obj.id), _LLU(obj_size), i); |
5d952b83 BH |
841 | ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, |
842 | &size_attr->attr); | |
843 | if (unlikely(ret)) | |
844 | goto out; | |
06886a5a | 845 | } |
8ff660ab | 846 | ret = ore_io_execute(ios); |
06886a5a BH |
847 | |
848 | out: | |
5d952b83 | 849 | kfree(size_attrs); |
8ff660ab | 850 | ore_put_io_state(ios); |
06886a5a BH |
851 | return ret; |
852 | } | |
cf283ade | 853 | EXPORT_SYMBOL(ore_truncate); |
85e44df4 BH |
854 | |
855 | const struct osd_attr g_attr_logical_length = ATTR_DEF( | |
856 | OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8); | |
cf283ade | 857 | EXPORT_SYMBOL(g_attr_logical_length); |