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 | ||
5a51c0c7 BH |
50 | /* ore_verify_layout does a couple of things: |
51 | * 1. Given a minimum number of needed parameters fixes up the rest of the | |
52 | * members to be operatonals for the ore. The needed parameters are those | |
53 | * that are defined by the pnfs-objects layout STD. | |
54 | * 2. Check to see if the current ore code actually supports these parameters | |
55 | * for example stripe_unit must be a multple of the system PAGE_SIZE, | |
56 | * and etc... | |
57 | * 3. Cache some havily used calculations that will be needed by users. | |
58 | */ | |
59 | ||
b916c5cd BH |
60 | static void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset, |
61 | struct ore_striping_info *si); | |
62 | ||
5a51c0c7 BH |
63 | enum { BIO_MAX_PAGES_KMALLOC = |
64 | (PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec),}; | |
65 | ||
66 | int ore_verify_layout(unsigned total_comps, struct ore_layout *layout) | |
67 | { | |
68 | u64 stripe_length; | |
69 | ||
70 | /* FIXME: Only raid0 is supported for now. */ | |
71 | if (layout->raid_algorithm != PNFS_OSD_RAID_0) { | |
72 | ORE_ERR("Only RAID_0 for now\n"); | |
73 | return -EINVAL; | |
74 | } | |
75 | if (0 != (layout->stripe_unit & ~PAGE_MASK)) { | |
76 | ORE_ERR("Stripe Unit(0x%llx)" | |
77 | " must be Multples of PAGE_SIZE(0x%lx)\n", | |
78 | _LLU(layout->stripe_unit), PAGE_SIZE); | |
79 | return -EINVAL; | |
80 | } | |
81 | if (layout->group_width) { | |
82 | if (!layout->group_depth) { | |
83 | ORE_ERR("group_depth == 0 && group_width != 0\n"); | |
84 | return -EINVAL; | |
85 | } | |
86 | if (total_comps < (layout->group_width * layout->mirrors_p1)) { | |
87 | ORE_ERR("Data Map wrong, " | |
88 | "numdevs=%d < group_width=%d * mirrors=%d\n", | |
89 | total_comps, layout->group_width, | |
90 | layout->mirrors_p1); | |
91 | return -EINVAL; | |
92 | } | |
93 | layout->group_count = total_comps / layout->mirrors_p1 / | |
94 | layout->group_width; | |
95 | } else { | |
96 | if (layout->group_depth) { | |
97 | printk(KERN_NOTICE "Warning: group_depth ignored " | |
98 | "group_width == 0 && group_depth == %lld\n", | |
99 | _LLU(layout->group_depth)); | |
100 | } | |
101 | layout->group_width = total_comps / layout->mirrors_p1; | |
102 | layout->group_depth = -1; | |
103 | layout->group_count = 1; | |
104 | } | |
105 | ||
106 | stripe_length = (u64)layout->group_width * layout->stripe_unit; | |
107 | if (stripe_length >= (1ULL << 32)) { | |
108 | ORE_ERR("Stripe_length(0x%llx) >= 32bit is not supported\n", | |
109 | _LLU(stripe_length)); | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | layout->max_io_length = | |
114 | (BIO_MAX_PAGES_KMALLOC * PAGE_SIZE - layout->stripe_unit) * | |
115 | layout->group_width; | |
116 | return 0; | |
117 | } | |
118 | EXPORT_SYMBOL(ore_verify_layout); | |
119 | ||
8ff660ab | 120 | static u8 *_ios_cred(struct ore_io_state *ios, unsigned index) |
9e9db456 | 121 | { |
5bf696da | 122 | return ios->oc->comps[index & ios->oc->single_comp].cred; |
9e9db456 BH |
123 | } |
124 | ||
8ff660ab | 125 | static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index) |
9e9db456 | 126 | { |
5bf696da | 127 | return &ios->oc->comps[index & ios->oc->single_comp].obj; |
9e9db456 BH |
128 | } |
129 | ||
8ff660ab | 130 | static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index) |
9e9db456 | 131 | { |
3bd98568 BH |
132 | ORE_DBGMSG2("oc->first_dev=%d oc->numdevs=%d i=%d oc->ods=%p\n", |
133 | ios->oc->first_dev, ios->oc->numdevs, index, | |
134 | ios->oc->ods); | |
135 | ||
d866d875 | 136 | return ore_comp_dev(ios->oc, index); |
9e9db456 BH |
137 | } |
138 | ||
b916c5cd BH |
139 | static int _get_io_state(struct ore_layout *layout, |
140 | struct ore_components *oc, unsigned numdevs, | |
141 | struct ore_io_state **pios) | |
b14f8ab2 | 142 | { |
8ff660ab | 143 | struct ore_io_state *ios; |
06886a5a BH |
144 | |
145 | /*TODO: Maybe use kmem_cach per sbi of size | |
45d3abcb | 146 | * exofs_io_state_size(layout->s_numdevs) |
06886a5a | 147 | */ |
b916c5cd | 148 | ios = kzalloc(ore_io_state_size(numdevs), GFP_KERNEL); |
06886a5a | 149 | if (unlikely(!ios)) { |
8ff660ab | 150 | ORE_DBGMSG("Failed kzalloc bytes=%d\n", |
b916c5cd | 151 | ore_io_state_size(numdevs)); |
06886a5a BH |
152 | *pios = NULL; |
153 | return -ENOMEM; | |
154 | } | |
155 | ||
45d3abcb | 156 | ios->layout = layout; |
5bf696da | 157 | ios->oc = oc; |
b916c5cd BH |
158 | *pios = ios; |
159 | return 0; | |
160 | } | |
161 | ||
162 | /* Allocate an io_state for only a single group of devices | |
163 | * | |
164 | * If a user needs to call ore_read/write() this version must be used becase it | |
165 | * allocates extra stuff for striping and raid. | |
166 | * The ore might decide to only IO less then @length bytes do to alignmets | |
167 | * and constrains as follows: | |
168 | * - The IO cannot cross group boundary. | |
169 | * - In raid5/6 The end of the IO must align at end of a stripe eg. | |
170 | * (@offset + @length) % strip_size == 0. Or the complete range is within a | |
171 | * single stripe. | |
172 | * - Memory condition only permitted a shorter IO. (A user can use @length=~0 | |
173 | * And check the returned ios->length for max_io_size.) | |
174 | * | |
175 | * The caller must check returned ios->length (and/or ios->nr_pages) and | |
176 | * re-issue these pages that fall outside of ios->length | |
177 | */ | |
178 | int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc, | |
179 | bool is_reading, u64 offset, u64 length, | |
180 | struct ore_io_state **pios) | |
181 | { | |
182 | struct ore_io_state *ios; | |
183 | unsigned numdevs = layout->group_width * layout->mirrors_p1; | |
184 | int ret; | |
185 | ||
186 | ret = _get_io_state(layout, oc, numdevs, pios); | |
187 | if (unlikely(ret)) | |
188 | return ret; | |
189 | ||
190 | ios = *pios; | |
e1042ba0 | 191 | ios->reading = is_reading; |
b916c5cd BH |
192 | ios->offset = offset; |
193 | ||
194 | if (length) { | |
98260754 BH |
195 | ore_calc_stripe_info(layout, offset, &ios->si); |
196 | ios->length = (length <= ios->si.group_length) ? length : | |
197 | ios->si.group_length; | |
b916c5cd BH |
198 | ios->nr_pages = (ios->length + PAGE_SIZE - 1) / PAGE_SIZE; |
199 | } | |
e1042ba0 | 200 | |
06886a5a | 201 | return 0; |
b14f8ab2 | 202 | } |
cf283ade | 203 | EXPORT_SYMBOL(ore_get_rw_state); |
b14f8ab2 | 204 | |
b916c5cd BH |
205 | /* Allocate an io_state for all the devices in the comps array |
206 | * | |
207 | * This version of io_state allocation is used mostly by create/remove | |
208 | * and trunc where we currently need all the devices. The only wastful | |
209 | * bit is the read/write_attributes with no IO. Those sites should | |
210 | * be converted to use ore_get_rw_state() with length=0 | |
211 | */ | |
5bf696da | 212 | int ore_get_io_state(struct ore_layout *layout, struct ore_components *oc, |
b916c5cd | 213 | struct ore_io_state **pios) |
e1042ba0 | 214 | { |
b916c5cd | 215 | return _get_io_state(layout, oc, oc->numdevs, pios); |
e1042ba0 | 216 | } |
cf283ade | 217 | EXPORT_SYMBOL(ore_get_io_state); |
e1042ba0 | 218 | |
8ff660ab | 219 | void ore_put_io_state(struct ore_io_state *ios) |
b14f8ab2 | 220 | { |
06886a5a BH |
221 | if (ios) { |
222 | unsigned i; | |
b14f8ab2 | 223 | |
06886a5a | 224 | for (i = 0; i < ios->numdevs; i++) { |
8ff660ab | 225 | struct ore_per_dev_state *per_dev = &ios->per_dev[i]; |
06886a5a BH |
226 | |
227 | if (per_dev->or) | |
228 | osd_end_request(per_dev->or); | |
229 | if (per_dev->bio) | |
230 | bio_put(per_dev->bio); | |
231 | } | |
232 | ||
233 | kfree(ios); | |
b14f8ab2 | 234 | } |
06886a5a | 235 | } |
cf283ade | 236 | EXPORT_SYMBOL(ore_put_io_state); |
b14f8ab2 | 237 | |
8ff660ab | 238 | static void _sync_done(struct ore_io_state *ios, void *p) |
06886a5a BH |
239 | { |
240 | struct completion *waiting = p; | |
b14f8ab2 | 241 | |
06886a5a BH |
242 | complete(waiting); |
243 | } | |
244 | ||
245 | static void _last_io(struct kref *kref) | |
246 | { | |
8ff660ab BH |
247 | struct ore_io_state *ios = container_of( |
248 | kref, struct ore_io_state, kref); | |
06886a5a BH |
249 | |
250 | ios->done(ios, ios->private); | |
251 | } | |
252 | ||
253 | static void _done_io(struct osd_request *or, void *p) | |
254 | { | |
8ff660ab | 255 | struct ore_io_state *ios = p; |
06886a5a BH |
256 | |
257 | kref_put(&ios->kref, _last_io); | |
258 | } | |
259 | ||
8ff660ab | 260 | static int ore_io_execute(struct ore_io_state *ios) |
06886a5a BH |
261 | { |
262 | DECLARE_COMPLETION_ONSTACK(wait); | |
263 | bool sync = (ios->done == NULL); | |
264 | int i, ret; | |
265 | ||
266 | if (sync) { | |
267 | ios->done = _sync_done; | |
268 | ios->private = &wait; | |
269 | } | |
270 | ||
271 | for (i = 0; i < ios->numdevs; i++) { | |
272 | struct osd_request *or = ios->per_dev[i].or; | |
273 | if (unlikely(!or)) | |
274 | continue; | |
275 | ||
9e9db456 | 276 | ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL); |
06886a5a | 277 | if (unlikely(ret)) { |
8ff660ab | 278 | ORE_DBGMSG("Failed to osd_finalize_request() => %d\n", |
06886a5a BH |
279 | ret); |
280 | return ret; | |
281 | } | |
282 | } | |
283 | ||
284 | kref_init(&ios->kref); | |
285 | ||
286 | for (i = 0; i < ios->numdevs; i++) { | |
287 | struct osd_request *or = ios->per_dev[i].or; | |
288 | if (unlikely(!or)) | |
289 | continue; | |
290 | ||
291 | kref_get(&ios->kref); | |
292 | osd_execute_request_async(or, _done_io, ios); | |
293 | } | |
294 | ||
295 | kref_put(&ios->kref, _last_io); | |
296 | ret = 0; | |
297 | ||
298 | if (sync) { | |
299 | wait_for_completion(&wait); | |
8ff660ab | 300 | ret = ore_check_io(ios, NULL); |
06886a5a | 301 | } |
b14f8ab2 BH |
302 | return ret; |
303 | } | |
304 | ||
22ddc556 BH |
305 | static void _clear_bio(struct bio *bio) |
306 | { | |
307 | struct bio_vec *bv; | |
308 | unsigned i; | |
309 | ||
310 | __bio_for_each_segment(bv, bio, i, 0) { | |
311 | unsigned this_count = bv->bv_len; | |
312 | ||
313 | if (likely(PAGE_SIZE == this_count)) | |
314 | clear_highpage(bv->bv_page); | |
315 | else | |
316 | zero_user(bv->bv_page, bv->bv_offset, this_count); | |
317 | } | |
318 | } | |
319 | ||
8ff660ab | 320 | int ore_check_io(struct ore_io_state *ios, u64 *resid) |
b14f8ab2 | 321 | { |
06886a5a BH |
322 | enum osd_err_priority acumulated_osd_err = 0; |
323 | int acumulated_lin_err = 0; | |
324 | int i; | |
b14f8ab2 | 325 | |
06886a5a BH |
326 | for (i = 0; i < ios->numdevs; i++) { |
327 | struct osd_sense_info osi; | |
22ddc556 BH |
328 | struct osd_request *or = ios->per_dev[i].or; |
329 | int ret; | |
330 | ||
331 | if (unlikely(!or)) | |
332 | continue; | |
06886a5a | 333 | |
22ddc556 | 334 | ret = osd_req_decode_sense(or, &osi); |
06886a5a BH |
335 | if (likely(!ret)) |
336 | continue; | |
337 | ||
22ddc556 BH |
338 | if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) { |
339 | /* start read offset passed endof file */ | |
340 | _clear_bio(ios->per_dev[i].bio); | |
8ff660ab | 341 | ORE_DBGMSG("start read offset passed end of file " |
22ddc556 | 342 | "offset=0x%llx, length=0x%llx\n", |
5d952b83 BH |
343 | _LLU(ios->per_dev[i].offset), |
344 | _LLU(ios->per_dev[i].length)); | |
22ddc556 BH |
345 | |
346 | continue; /* we recovered */ | |
06886a5a BH |
347 | } |
348 | ||
349 | if (osi.osd_err_pri >= acumulated_osd_err) { | |
350 | acumulated_osd_err = osi.osd_err_pri; | |
351 | acumulated_lin_err = ret; | |
352 | } | |
353 | } | |
354 | ||
355 | /* TODO: raid specific residual calculations */ | |
356 | if (resid) { | |
357 | if (likely(!acumulated_lin_err)) | |
358 | *resid = 0; | |
359 | else | |
360 | *resid = ios->length; | |
361 | } | |
362 | ||
363 | return acumulated_lin_err; | |
364 | } | |
cf283ade | 365 | EXPORT_SYMBOL(ore_check_io); |
06886a5a | 366 | |
b367e78b BH |
367 | /* |
368 | * L - logical offset into the file | |
369 | * | |
50a76fd3 | 370 | * U - The number of bytes in a stripe within a group |
b367e78b BH |
371 | * |
372 | * U = stripe_unit * group_width | |
373 | * | |
50a76fd3 BH |
374 | * T - The number of bytes striped within a group of component objects |
375 | * (before advancing to the next group) | |
b367e78b | 376 | * |
50a76fd3 BH |
377 | * T = stripe_unit * group_width * group_depth |
378 | * | |
379 | * S - The number of bytes striped across all component objects | |
380 | * before the pattern repeats | |
381 | * | |
382 | * S = stripe_unit * group_width * group_depth * group_count | |
383 | * | |
384 | * M - The "major" (i.e., across all components) stripe number | |
385 | * | |
386 | * M = L / S | |
387 | * | |
388 | * G - Counts the groups from the beginning of the major stripe | |
389 | * | |
390 | * G = (L - (M * S)) / T [or (L % S) / T] | |
391 | * | |
392 | * H - The byte offset within the group | |
393 | * | |
394 | * H = (L - (M * S)) % T [or (L % S) % T] | |
395 | * | |
396 | * N - The "minor" (i.e., across the group) stripe number | |
397 | * | |
398 | * N = H / U | |
b367e78b BH |
399 | * |
400 | * C - The component index coresponding to L | |
401 | * | |
50a76fd3 BH |
402 | * C = (H - (N * U)) / stripe_unit + G * group_width |
403 | * [or (L % U) / stripe_unit + G * group_width] | |
b367e78b BH |
404 | * |
405 | * O - The component offset coresponding to L | |
406 | * | |
50a76fd3 | 407 | * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit |
b367e78b | 408 | */ |
eb507bc1 BH |
409 | static void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset, |
410 | struct ore_striping_info *si) | |
5d952b83 | 411 | { |
16f75bb3 BH |
412 | u32 stripe_unit = layout->stripe_unit; |
413 | u32 group_width = layout->group_width; | |
414 | u64 group_depth = layout->group_depth; | |
50a76fd3 | 415 | |
b367e78b | 416 | u32 U = stripe_unit * group_width; |
50a76fd3 | 417 | u64 T = U * group_depth; |
16f75bb3 | 418 | u64 S = T * layout->group_count; |
50a76fd3 BH |
419 | u64 M = div64_u64(file_offset, S); |
420 | ||
421 | /* | |
422 | G = (L - (M * S)) / T | |
423 | H = (L - (M * S)) % T | |
424 | */ | |
425 | u64 LmodS = file_offset - M * S; | |
426 | u32 G = div64_u64(LmodS, T); | |
427 | u64 H = LmodS - G * T; | |
428 | ||
429 | u32 N = div_u64(H, U); | |
430 | ||
431 | /* "H - (N * U)" is just "H % U" so it's bound to u32 */ | |
432 | si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width; | |
16f75bb3 | 433 | si->dev *= layout->mirrors_p1; |
b367e78b | 434 | |
50a76fd3 | 435 | div_u64_rem(file_offset, stripe_unit, &si->unit_off); |
5d952b83 | 436 | |
50a76fd3 BH |
437 | si->obj_offset = si->unit_off + (N * stripe_unit) + |
438 | (M * group_depth * stripe_unit); | |
439 | ||
440 | si->group_length = T - H; | |
16f75bb3 | 441 | si->M = M; |
5d952b83 BH |
442 | } |
443 | ||
8ff660ab BH |
444 | static int _add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg, |
445 | unsigned pgbase, struct ore_per_dev_state *per_dev, | |
86093aaf | 446 | int cur_len) |
5d952b83 | 447 | { |
86093aaf | 448 | unsigned pg = *cur_pg; |
5d952b83 | 449 | struct request_queue *q = |
9e9db456 | 450 | osd_request_queue(_ios_od(ios, per_dev->dev)); |
bbf9a31b BH |
451 | unsigned len = cur_len; |
452 | int ret; | |
5d952b83 BH |
453 | |
454 | if (per_dev->bio == NULL) { | |
455 | unsigned pages_in_stripe = ios->layout->group_width * | |
456 | (ios->layout->stripe_unit / PAGE_SIZE); | |
86093aaf | 457 | unsigned bio_size = (ios->nr_pages + pages_in_stripe) / |
5d952b83 BH |
458 | ios->layout->group_width; |
459 | ||
460 | per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size); | |
461 | if (unlikely(!per_dev->bio)) { | |
8ff660ab | 462 | ORE_DBGMSG("Failed to allocate BIO size=%u\n", |
5d952b83 | 463 | bio_size); |
bbf9a31b BH |
464 | ret = -ENOMEM; |
465 | goto out; | |
5d952b83 BH |
466 | } |
467 | } | |
468 | ||
469 | while (cur_len > 0) { | |
86093aaf BH |
470 | unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len); |
471 | unsigned added_len; | |
5d952b83 | 472 | |
86093aaf BH |
473 | BUG_ON(ios->nr_pages <= pg); |
474 | cur_len -= pglen; | |
5d952b83 | 475 | |
86093aaf BH |
476 | added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg], |
477 | pglen, pgbase); | |
bbf9a31b BH |
478 | if (unlikely(pglen != added_len)) { |
479 | ret = -ENOMEM; | |
480 | goto out; | |
481 | } | |
86093aaf BH |
482 | pgbase = 0; |
483 | ++pg; | |
5d952b83 BH |
484 | } |
485 | BUG_ON(cur_len); | |
486 | ||
bbf9a31b | 487 | per_dev->length += len; |
86093aaf | 488 | *cur_pg = pg; |
bbf9a31b BH |
489 | ret = 0; |
490 | out: /* we fail the complete unit on an error eg don't advance | |
491 | * per_dev->length and cur_pg. This means that we might have a bigger | |
492 | * bio than the CDB requested length (per_dev->length). That's fine | |
493 | * only the oposite is fatal. | |
494 | */ | |
495 | return ret; | |
5d952b83 BH |
496 | } |
497 | ||
98260754 | 498 | static int _prepare_for_striping(struct ore_io_state *ios) |
5d952b83 | 499 | { |
98260754 | 500 | struct ore_striping_info *si = &ios->si; |
5d952b83 | 501 | unsigned stripe_unit = ios->layout->stripe_unit; |
b367e78b | 502 | unsigned mirrors_p1 = ios->layout->mirrors_p1; |
50a76fd3 | 503 | unsigned devs_in_group = ios->layout->group_width * mirrors_p1; |
b367e78b | 504 | unsigned dev = si->dev; |
50a76fd3 | 505 | unsigned first_dev = dev - (dev % devs_in_group); |
50a76fd3 | 506 | unsigned cur_pg = ios->pages_consumed; |
98260754 | 507 | u64 length = ios->length; |
86093aaf | 508 | int ret = 0; |
5d952b83 | 509 | |
98260754 | 510 | if (!ios->pages) { |
98260754 BH |
511 | ios->numdevs = ios->layout->mirrors_p1; |
512 | return 0; | |
513 | } | |
514 | ||
515 | BUG_ON(length > si->group_length); | |
516 | ||
5d952b83 | 517 | while (length) { |
b916c5cd BH |
518 | unsigned comp = dev - first_dev; |
519 | struct ore_per_dev_state *per_dev = &ios->per_dev[comp]; | |
b367e78b | 520 | unsigned cur_len, page_off = 0; |
5d952b83 BH |
521 | |
522 | if (!per_dev->length) { | |
b367e78b BH |
523 | per_dev->dev = dev; |
524 | if (dev < si->dev) { | |
525 | per_dev->offset = si->obj_offset + stripe_unit - | |
526 | si->unit_off; | |
527 | cur_len = stripe_unit; | |
528 | } else if (dev == si->dev) { | |
529 | per_dev->offset = si->obj_offset; | |
530 | cur_len = stripe_unit - si->unit_off; | |
531 | page_off = si->unit_off & ~PAGE_MASK; | |
532 | BUG_ON(page_off && (page_off != ios->pgbase)); | |
533 | } else { /* dev > si->dev */ | |
534 | per_dev->offset = si->obj_offset - si->unit_off; | |
535 | cur_len = stripe_unit; | |
536 | } | |
5d952b83 | 537 | } else { |
b367e78b | 538 | cur_len = stripe_unit; |
5d952b83 | 539 | } |
b367e78b BH |
540 | if (cur_len >= length) |
541 | cur_len = length; | |
5d952b83 | 542 | |
86093aaf BH |
543 | ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev, |
544 | cur_len); | |
5d952b83 BH |
545 | if (unlikely(ret)) |
546 | goto out; | |
547 | ||
6e31609b BH |
548 | dev += mirrors_p1; |
549 | dev = (dev % devs_in_group) + first_dev; | |
5d952b83 BH |
550 | |
551 | length -= cur_len; | |
552 | } | |
553 | out: | |
b916c5cd | 554 | ios->numdevs = devs_in_group; |
50a76fd3 | 555 | ios->pages_consumed = cur_pg; |
bbf9a31b BH |
556 | if (unlikely(ret)) { |
557 | if (length == ios->length) | |
558 | return ret; | |
559 | else | |
560 | ios->length -= length; | |
561 | } | |
562 | return 0; | |
5d952b83 BH |
563 | } |
564 | ||
8ff660ab | 565 | int ore_create(struct ore_io_state *ios) |
06886a5a BH |
566 | { |
567 | int i, ret; | |
568 | ||
5bf696da | 569 | for (i = 0; i < ios->oc->numdevs; i++) { |
06886a5a BH |
570 | struct osd_request *or; |
571 | ||
9e9db456 | 572 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
06886a5a | 573 | if (unlikely(!or)) { |
8ff660ab | 574 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
575 | ret = -ENOMEM; |
576 | goto out; | |
577 | } | |
578 | ios->per_dev[i].or = or; | |
579 | ios->numdevs++; | |
580 | ||
9e9db456 | 581 | osd_req_create_object(or, _ios_obj(ios, i)); |
06886a5a | 582 | } |
8ff660ab | 583 | ret = ore_io_execute(ios); |
06886a5a BH |
584 | |
585 | out: | |
586 | return ret; | |
587 | } | |
cf283ade | 588 | EXPORT_SYMBOL(ore_create); |
06886a5a | 589 | |
8ff660ab | 590 | int ore_remove(struct ore_io_state *ios) |
06886a5a BH |
591 | { |
592 | int i, ret; | |
593 | ||
5bf696da | 594 | for (i = 0; i < ios->oc->numdevs; i++) { |
06886a5a BH |
595 | struct osd_request *or; |
596 | ||
9e9db456 | 597 | or = osd_start_request(_ios_od(ios, i), GFP_KERNEL); |
06886a5a | 598 | if (unlikely(!or)) { |
8ff660ab | 599 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
600 | ret = -ENOMEM; |
601 | goto out; | |
602 | } | |
603 | ios->per_dev[i].or = or; | |
604 | ios->numdevs++; | |
605 | ||
9e9db456 | 606 | osd_req_remove_object(or, _ios_obj(ios, i)); |
06886a5a | 607 | } |
8ff660ab | 608 | ret = ore_io_execute(ios); |
06886a5a BH |
609 | |
610 | out: | |
611 | return ret; | |
612 | } | |
cf283ade | 613 | EXPORT_SYMBOL(ore_remove); |
06886a5a | 614 | |
8ff660ab | 615 | static int _write_mirror(struct ore_io_state *ios, int cur_comp) |
06886a5a | 616 | { |
8ff660ab | 617 | struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp]; |
5d952b83 BH |
618 | unsigned dev = ios->per_dev[cur_comp].dev; |
619 | unsigned last_comp = cur_comp + ios->layout->mirrors_p1; | |
620 | int ret = 0; | |
06886a5a | 621 | |
50a76fd3 BH |
622 | if (ios->pages && !master_dev->length) |
623 | return 0; /* Just an empty slot */ | |
624 | ||
5d952b83 | 625 | for (; cur_comp < last_comp; ++cur_comp, ++dev) { |
8ff660ab | 626 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
06886a5a BH |
627 | struct osd_request *or; |
628 | ||
9e9db456 | 629 | or = osd_start_request(_ios_od(ios, dev), GFP_KERNEL); |
06886a5a | 630 | if (unlikely(!or)) { |
8ff660ab | 631 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
06886a5a BH |
632 | ret = -ENOMEM; |
633 | goto out; | |
634 | } | |
5d952b83 | 635 | per_dev->or = or; |
06886a5a | 636 | |
86093aaf | 637 | if (ios->pages) { |
06886a5a BH |
638 | struct bio *bio; |
639 | ||
5d952b83 | 640 | if (per_dev != master_dev) { |
04dc1e88 | 641 | bio = bio_kmalloc(GFP_KERNEL, |
5d952b83 | 642 | master_dev->bio->bi_max_vecs); |
04dc1e88 | 643 | if (unlikely(!bio)) { |
8ff660ab | 644 | ORE_DBGMSG( |
426d3107 | 645 | "Failed to allocate BIO size=%u\n", |
5d952b83 | 646 | master_dev->bio->bi_max_vecs); |
04dc1e88 BH |
647 | ret = -ENOMEM; |
648 | goto out; | |
649 | } | |
650 | ||
5d952b83 | 651 | __bio_clone(bio, master_dev->bio); |
04dc1e88 BH |
652 | bio->bi_bdev = NULL; |
653 | bio->bi_next = NULL; | |
6851a5e5 | 654 | per_dev->offset = master_dev->offset; |
5d952b83 BH |
655 | per_dev->length = master_dev->length; |
656 | per_dev->bio = bio; | |
657 | per_dev->dev = dev; | |
04dc1e88 | 658 | } else { |
5d952b83 BH |
659 | bio = master_dev->bio; |
660 | /* FIXME: bio_set_dir() */ | |
7b6d91da | 661 | bio->bi_rw |= REQ_WRITE; |
04dc1e88 | 662 | } |
06886a5a | 663 | |
9e9db456 BH |
664 | osd_req_write(or, _ios_obj(ios, dev), per_dev->offset, |
665 | bio, per_dev->length); | |
8ff660ab | 666 | ORE_DBGMSG("write(0x%llx) offset=0x%llx " |
34ce4e7c | 667 | "length=0x%llx dev=%d\n", |
9e9db456 BH |
668 | _LLU(_ios_obj(ios, dev)->id), |
669 | _LLU(per_dev->offset), | |
5d952b83 | 670 | _LLU(per_dev->length), dev); |
06886a5a | 671 | } else if (ios->kern_buff) { |
6851a5e5 BH |
672 | per_dev->offset = ios->si.obj_offset; |
673 | per_dev->dev = ios->si.dev + dev; | |
674 | ||
675 | /* no cross device without page array */ | |
676 | BUG_ON((ios->layout->group_width > 1) && | |
677 | (ios->si.unit_off + ios->length > | |
678 | ios->layout->stripe_unit)); | |
679 | ||
680 | ret = osd_req_write_kern(or, _ios_obj(ios, per_dev->dev), | |
9e9db456 BH |
681 | per_dev->offset, |
682 | ios->kern_buff, ios->length); | |
5d952b83 BH |
683 | if (unlikely(ret)) |
684 | goto out; | |
8ff660ab | 685 | ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx " |
34ce4e7c | 686 | "length=0x%llx dev=%d\n", |
9e9db456 BH |
687 | _LLU(_ios_obj(ios, dev)->id), |
688 | _LLU(per_dev->offset), | |
6851a5e5 | 689 | _LLU(ios->length), per_dev->dev); |
06886a5a | 690 | } else { |
9e9db456 | 691 | osd_req_set_attributes(or, _ios_obj(ios, dev)); |
8ff660ab | 692 | ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n", |
9e9db456 BH |
693 | _LLU(_ios_obj(ios, dev)->id), |
694 | ios->out_attr_len, dev); | |
06886a5a BH |
695 | } |
696 | ||
697 | if (ios->out_attr) | |
698 | osd_req_add_set_attr_list(or, ios->out_attr, | |
699 | ios->out_attr_len); | |
700 | ||
701 | if (ios->in_attr) | |
702 | osd_req_add_get_attr_list(or, ios->in_attr, | |
703 | ios->in_attr_len); | |
b14f8ab2 | 704 | } |
06886a5a BH |
705 | |
706 | out: | |
707 | return ret; | |
708 | } | |
709 | ||
8ff660ab | 710 | int ore_write(struct ore_io_state *ios) |
5d952b83 BH |
711 | { |
712 | int i; | |
713 | int ret; | |
714 | ||
715 | ret = _prepare_for_striping(ios); | |
716 | if (unlikely(ret)) | |
717 | return ret; | |
718 | ||
719 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
8ff660ab | 720 | ret = _write_mirror(ios, i); |
5d952b83 BH |
721 | if (unlikely(ret)) |
722 | return ret; | |
723 | } | |
724 | ||
8ff660ab | 725 | ret = ore_io_execute(ios); |
5d952b83 BH |
726 | return ret; |
727 | } | |
cf283ade | 728 | EXPORT_SYMBOL(ore_write); |
5d952b83 | 729 | |
8ff660ab | 730 | static int _read_mirror(struct ore_io_state *ios, unsigned cur_comp) |
06886a5a | 731 | { |
46f4d973 | 732 | struct osd_request *or; |
8ff660ab | 733 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
9e9db456 BH |
734 | struct osd_obj_id *obj = _ios_obj(ios, cur_comp); |
735 | unsigned first_dev = (unsigned)obj->id; | |
06886a5a | 736 | |
50a76fd3 BH |
737 | if (ios->pages && !per_dev->length) |
738 | return 0; /* Just an empty slot */ | |
739 | ||
5d952b83 | 740 | first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1; |
9e9db456 | 741 | or = osd_start_request(_ios_od(ios, first_dev), GFP_KERNEL); |
46f4d973 | 742 | if (unlikely(!or)) { |
8ff660ab | 743 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
46f4d973 BH |
744 | return -ENOMEM; |
745 | } | |
746 | per_dev->or = or; | |
46f4d973 | 747 | |
86093aaf | 748 | if (ios->pages) { |
9e9db456 | 749 | osd_req_read(or, obj, per_dev->offset, |
5d952b83 | 750 | per_dev->bio, per_dev->length); |
8ff660ab | 751 | ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx" |
9e9db456 | 752 | " dev=%d\n", _LLU(obj->id), |
5d952b83 | 753 | _LLU(per_dev->offset), _LLU(per_dev->length), |
46f4d973 | 754 | first_dev); |
46f4d973 | 755 | } else { |
6851a5e5 BH |
756 | BUG_ON(ios->kern_buff); |
757 | ||
9e9db456 | 758 | osd_req_get_attributes(or, obj); |
8ff660ab | 759 | ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n", |
9e9db456 BH |
760 | _LLU(obj->id), |
761 | ios->in_attr_len, first_dev); | |
46f4d973 | 762 | } |
46f4d973 BH |
763 | if (ios->out_attr) |
764 | osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); | |
b14f8ab2 | 765 | |
46f4d973 BH |
766 | if (ios->in_attr) |
767 | osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); | |
b14f8ab2 | 768 | |
5d952b83 BH |
769 | return 0; |
770 | } | |
771 | ||
8ff660ab | 772 | int ore_read(struct ore_io_state *ios) |
5d952b83 BH |
773 | { |
774 | int i; | |
775 | int ret; | |
776 | ||
777 | ret = _prepare_for_striping(ios); | |
778 | if (unlikely(ret)) | |
779 | return ret; | |
780 | ||
781 | for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) { | |
8ff660ab | 782 | ret = _read_mirror(ios, i); |
5d952b83 BH |
783 | if (unlikely(ret)) |
784 | return ret; | |
785 | } | |
786 | ||
8ff660ab | 787 | ret = ore_io_execute(ios); |
5d952b83 | 788 | return ret; |
b14f8ab2 | 789 | } |
cf283ade | 790 | EXPORT_SYMBOL(ore_read); |
b14f8ab2 | 791 | |
8ff660ab | 792 | int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr) |
b14f8ab2 BH |
793 | { |
794 | struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ | |
795 | void *iter = NULL; | |
796 | int nelem; | |
797 | ||
798 | do { | |
799 | nelem = 1; | |
06886a5a BH |
800 | osd_req_decode_get_attr_list(ios->per_dev[0].or, |
801 | &cur_attr, &nelem, &iter); | |
b14f8ab2 BH |
802 | if ((cur_attr.attr_page == attr->attr_page) && |
803 | (cur_attr.attr_id == attr->attr_id)) { | |
804 | attr->len = cur_attr.len; | |
805 | attr->val_ptr = cur_attr.val_ptr; | |
806 | return 0; | |
807 | } | |
808 | } while (iter); | |
809 | ||
810 | return -EIO; | |
811 | } | |
cf283ade | 812 | EXPORT_SYMBOL(extract_attr_from_ios); |
06886a5a | 813 | |
8ff660ab | 814 | static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp, |
5d952b83 BH |
815 | struct osd_attr *attr) |
816 | { | |
817 | int last_comp = cur_comp + ios->layout->mirrors_p1; | |
818 | ||
819 | for (; cur_comp < last_comp; ++cur_comp) { | |
8ff660ab | 820 | struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp]; |
5d952b83 BH |
821 | struct osd_request *or; |
822 | ||
9e9db456 | 823 | or = osd_start_request(_ios_od(ios, cur_comp), GFP_KERNEL); |
5d952b83 | 824 | if (unlikely(!or)) { |
8ff660ab | 825 | ORE_ERR("%s: osd_start_request failed\n", __func__); |
5d952b83 BH |
826 | return -ENOMEM; |
827 | } | |
828 | per_dev->or = or; | |
829 | ||
9e9db456 | 830 | osd_req_set_attributes(or, _ios_obj(ios, cur_comp)); |
5d952b83 BH |
831 | osd_req_add_set_attr_list(or, attr, 1); |
832 | } | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
16f75bb3 | 837 | struct _trunc_info { |
eb507bc1 | 838 | struct ore_striping_info si; |
16f75bb3 BH |
839 | u64 prev_group_obj_off; |
840 | u64 next_group_obj_off; | |
841 | ||
842 | unsigned first_group_dev; | |
843 | unsigned nex_group_dev; | |
16f75bb3 BH |
844 | }; |
845 | ||
1958c7c2 HS |
846 | static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset, |
847 | struct _trunc_info *ti) | |
16f75bb3 BH |
848 | { |
849 | unsigned stripe_unit = layout->stripe_unit; | |
850 | ||
eb507bc1 | 851 | ore_calc_stripe_info(layout, file_offset, &ti->si); |
16f75bb3 BH |
852 | |
853 | ti->prev_group_obj_off = ti->si.M * stripe_unit; | |
854 | ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0; | |
855 | ||
856 | ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width); | |
857 | ti->nex_group_dev = ti->first_group_dev + layout->group_width; | |
16f75bb3 BH |
858 | } |
859 | ||
5bf696da | 860 | int ore_truncate(struct ore_layout *layout, struct ore_components *oc, |
9e9db456 | 861 | u64 size) |
06886a5a | 862 | { |
8ff660ab | 863 | struct ore_io_state *ios; |
5d952b83 BH |
864 | struct exofs_trunc_attr { |
865 | struct osd_attr attr; | |
866 | __be64 newsize; | |
867 | } *size_attrs; | |
16f75bb3 | 868 | struct _trunc_info ti; |
06886a5a BH |
869 | int i, ret; |
870 | ||
5bf696da | 871 | ret = ore_get_io_state(layout, oc, &ios); |
5d952b83 BH |
872 | if (unlikely(ret)) |
873 | return ret; | |
874 | ||
16f75bb3 BH |
875 | _calc_trunk_info(ios->layout, size, &ti); |
876 | ||
b916c5cd | 877 | size_attrs = kcalloc(ios->oc->numdevs, sizeof(*size_attrs), |
5d952b83 BH |
878 | GFP_KERNEL); |
879 | if (unlikely(!size_attrs)) { | |
880 | ret = -ENOMEM; | |
881 | goto out; | |
882 | } | |
06886a5a | 883 | |
5bf696da | 884 | ios->numdevs = ios->oc->numdevs; |
06886a5a | 885 | |
b916c5cd | 886 | for (i = 0; i < ios->numdevs; ++i) { |
5d952b83 BH |
887 | struct exofs_trunc_attr *size_attr = &size_attrs[i]; |
888 | u64 obj_size; | |
06886a5a | 889 | |
16f75bb3 BH |
890 | if (i < ti.first_group_dev) |
891 | obj_size = ti.prev_group_obj_off; | |
892 | else if (i >= ti.nex_group_dev) | |
893 | obj_size = ti.next_group_obj_off; | |
894 | else if (i < ti.si.dev) /* dev within this group */ | |
895 | obj_size = ti.si.obj_offset + | |
896 | ios->layout->stripe_unit - ti.si.unit_off; | |
897 | else if (i == ti.si.dev) | |
898 | obj_size = ti.si.obj_offset; | |
899 | else /* i > ti.dev */ | |
900 | obj_size = ti.si.obj_offset - ti.si.unit_off; | |
06886a5a | 901 | |
5d952b83 BH |
902 | size_attr->newsize = cpu_to_be64(obj_size); |
903 | size_attr->attr = g_attr_logical_length; | |
904 | size_attr->attr.val_ptr = &size_attr->newsize; | |
905 | ||
8ff660ab | 906 | ORE_DBGMSG("trunc(0x%llx) obj_offset=0x%llx dev=%d\n", |
5bf696da | 907 | _LLU(oc->comps->obj.id), _LLU(obj_size), i); |
5d952b83 BH |
908 | ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1, |
909 | &size_attr->attr); | |
910 | if (unlikely(ret)) | |
911 | goto out; | |
06886a5a | 912 | } |
8ff660ab | 913 | ret = ore_io_execute(ios); |
06886a5a BH |
914 | |
915 | out: | |
5d952b83 | 916 | kfree(size_attrs); |
8ff660ab | 917 | ore_put_io_state(ios); |
06886a5a BH |
918 | return ret; |
919 | } | |
cf283ade | 920 | EXPORT_SYMBOL(ore_truncate); |
85e44df4 BH |
921 | |
922 | const struct osd_attr g_attr_logical_length = ATTR_DEF( | |
923 | OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8); | |
cf283ade | 924 | EXPORT_SYMBOL(g_attr_logical_length); |