Blame view
block/bio-integrity.c
14.2 KB
7ba1ba12e block: Block laye... |
1 2 3 |
/* * bio-integrity.c - bio data integrity extensions * |
7878cba9f block: Create bip... |
4 |
* Copyright (C) 2007, 2008, 2009 Oracle Corporation |
7ba1ba12e block: Block laye... |
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
* Written by: Martin K. Petersen <martin.petersen@oracle.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, * USA. * */ #include <linux/blkdev.h> #include <linux/mempool.h> |
afeacc8c1 fs: add export.h ... |
25 |
#include <linux/export.h> |
7ba1ba12e block: Block laye... |
26 27 |
#include <linux/bio.h> #include <linux/workqueue.h> |
5a0e3ad6a include cleanup: ... |
28 |
#include <linux/slab.h> |
1179a5a08 block/bio-integri... |
29 |
#include "blk.h" |
7ba1ba12e block: Block laye... |
30 |
|
9f060e223 block: Convert in... |
31 |
#define BIP_INLINE_VECS 4 |
7878cba9f block: Create bip... |
32 |
|
9f060e223 block: Convert in... |
33 |
static struct kmem_cache *bip_slab; |
7ba1ba12e block: Block laye... |
34 |
static struct workqueue_struct *kintegrityd_wq; |
5a48fc147 block: blk_flush_... |
35 36 37 38 |
void blk_flush_integrity(void) { flush_workqueue(kintegrityd_wq); } |
7ba1ba12e block: Block laye... |
39 |
/** |
1e2a410ff block: Ues bi_poo... |
40 |
* bio_integrity_alloc - Allocate integrity payload and attach it to bio |
7ba1ba12e block: Block laye... |
41 42 43 |
* @bio: bio to attach integrity metadata to * @gfp_mask: Memory allocation mask * @nr_vecs: Number of integrity metadata scatter-gather elements |
7ba1ba12e block: Block laye... |
44 45 46 47 48 |
* * Description: This function prepares a bio for attaching integrity * metadata. nr_vecs specifies the maximum number of pages containing * integrity metadata that can be attached. */ |
1e2a410ff block: Ues bi_poo... |
49 50 51 |
struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp_mask, unsigned int nr_vecs) |
7ba1ba12e block: Block laye... |
52 53 |
{ struct bio_integrity_payload *bip; |
1e2a410ff block: Ues bi_poo... |
54 |
struct bio_set *bs = bio->bi_pool; |
9f060e223 block: Convert in... |
55 |
unsigned inline_vecs; |
bb8bd38b9 bio integrity: do... |
56 |
if (!bs || !bs->bio_integrity_pool) { |
9f060e223 block: Convert in... |
57 58 59 60 |
bip = kmalloc(sizeof(struct bio_integrity_payload) + sizeof(struct bio_vec) * nr_vecs, gfp_mask); inline_vecs = nr_vecs; } else { |
7878cba9f block: Create bip... |
61 |
bip = mempool_alloc(bs->bio_integrity_pool, gfp_mask); |
9f060e223 block: Convert in... |
62 |
inline_vecs = BIP_INLINE_VECS; |
7ba1ba12e block: Block laye... |
63 |
} |
9f060e223 block: Convert in... |
64 |
if (unlikely(!bip)) |
06c1e3902 blk-integrity: em... |
65 |
return ERR_PTR(-ENOMEM); |
9f060e223 block: Convert in... |
66 |
|
7878cba9f block: Create bip... |
67 |
memset(bip, 0, sizeof(*bip)); |
9f060e223 block: Convert in... |
68 |
if (nr_vecs > inline_vecs) { |
ed996a52c block: simplify a... |
69 |
unsigned long idx = 0; |
9f060e223 block: Convert in... |
70 71 72 73 |
bip->bip_vec = bvec_alloc(gfp_mask, nr_vecs, &idx, bs->bvec_integrity_pool); if (!bip->bip_vec) goto err; |
cbcd1054a bio-integrity: ad... |
74 |
bip->bip_max_vcnt = bvec_nr_vecs(idx); |
ed996a52c block: simplify a... |
75 |
bip->bip_slab = idx; |
9f060e223 block: Convert in... |
76 77 |
} else { bip->bip_vec = bip->bip_inline_vecs; |
cbcd1054a bio-integrity: ad... |
78 |
bip->bip_max_vcnt = inline_vecs; |
9f060e223 block: Convert in... |
79 |
} |
7ba1ba12e block: Block laye... |
80 81 |
bip->bip_bio = bio; bio->bi_integrity = bip; |
1eff9d322 block: rename bio... |
82 |
bio->bi_opf |= REQ_INTEGRITY; |
7ba1ba12e block: Block laye... |
83 84 |
return bip; |
9f060e223 block: Convert in... |
85 86 |
err: mempool_free(bip, bs->bio_integrity_pool); |
06c1e3902 blk-integrity: em... |
87 |
return ERR_PTR(-ENOMEM); |
7ba1ba12e block: Block laye... |
88 |
} |
7ba1ba12e block: Block laye... |
89 90 91 92 93 |
EXPORT_SYMBOL(bio_integrity_alloc); /** * bio_integrity_free - Free bio integrity payload * @bio: bio containing bip to be freed |
7ba1ba12e block: Block laye... |
94 95 96 97 |
* * Description: Used to free the integrity portion of a bio. Usually * called from bio_free(). */ |
1e2a410ff block: Ues bi_poo... |
98 |
void bio_integrity_free(struct bio *bio) |
7ba1ba12e block: Block laye... |
99 |
{ |
180b2f95d block: Replace bi... |
100 |
struct bio_integrity_payload *bip = bio_integrity(bio); |
1e2a410ff block: Ues bi_poo... |
101 |
struct bio_set *bs = bio->bi_pool; |
b1f013885 block: Relocate b... |
102 |
if (bip->bip_flags & BIP_BLOCK_INTEGRITY) |
5f9378fa9 block: Remove bip... |
103 104 |
kfree(page_address(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset); |
7ba1ba12e block: Block laye... |
105 |
|
bb8bd38b9 bio integrity: do... |
106 |
if (bs && bs->bio_integrity_pool) { |
ed996a52c block: simplify a... |
107 |
bvec_free(bs->bvec_integrity_pool, bip->bip_vec, bip->bip_slab); |
9f060e223 block: Convert in... |
108 |
|
7878cba9f block: Create bip... |
109 |
mempool_free(bip, bs->bio_integrity_pool); |
9f060e223 block: Convert in... |
110 111 112 |
} else { kfree(bip); } |
7ba1ba12e block: Block laye... |
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 |
bio->bi_integrity = NULL; } EXPORT_SYMBOL(bio_integrity_free); /** * bio_integrity_add_page - Attach integrity metadata * @bio: bio to update * @page: page containing integrity metadata * @len: number of bytes of integrity metadata in page * @offset: start offset within page * * Description: Attach a page containing integrity metadata to bio. */ int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len, unsigned int offset) { |
180b2f95d block: Replace bi... |
130 |
struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12e block: Block laye... |
131 |
struct bio_vec *iv; |
cbcd1054a bio-integrity: ad... |
132 |
if (bip->bip_vcnt >= bip->bip_max_vcnt) { |
7ba1ba12e block: Block laye... |
133 134 135 136 |
printk(KERN_ERR "%s: bip_vec full ", __func__); return 0; } |
d57a5f7c6 bio-integrity: Co... |
137 |
iv = bip->bip_vec + bip->bip_vcnt; |
7ba1ba12e block: Block laye... |
138 |
|
87a816df5 block: Refuse add... |
139 140 141 142 |
if (bip->bip_vcnt && bvec_gap_to_prev(bdev_get_queue(bio->bi_bdev), &bip->bip_vec[bip->bip_vcnt - 1], offset)) return 0; |
7ba1ba12e block: Block laye... |
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 |
iv->bv_page = page; iv->bv_len = len; iv->bv_offset = offset; bip->bip_vcnt++; return len; } EXPORT_SYMBOL(bio_integrity_add_page); /** * bio_integrity_enabled - Check whether integrity can be passed * @bio: bio to check * * Description: Determines whether bio_integrity_prep() can be called * on this bio or not. bio data direction and target device must be * set prior to calling. The functions honors the write_generate and * read_verify flags in sysfs. */ |
e7258c1a2 block: Get rid of... |
161 |
bool bio_integrity_enabled(struct bio *bio) |
7ba1ba12e block: Block laye... |
162 |
{ |
e7258c1a2 block: Get rid of... |
163 |
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); |
e69f18f06 block: Ensure we ... |
164 |
if (!bio_is_rw(bio)) |
e7258c1a2 block: Get rid of... |
165 |
return false; |
e69f18f06 block: Ensure we ... |
166 |
|
7ba1ba12e block: Block laye... |
167 168 |
/* Already protected? */ if (bio_integrity(bio)) |
e7258c1a2 block: Get rid of... |
169 170 171 172 |
return false; if (bi == NULL) return false; |
0f8087ecd block: Consolidat... |
173 |
if (bio_data_dir(bio) == READ && bi->profile->verify_fn != NULL && |
8288f496e block: Add prefix... |
174 |
(bi->flags & BLK_INTEGRITY_VERIFY)) |
e7258c1a2 block: Get rid of... |
175 |
return true; |
0f8087ecd block: Consolidat... |
176 |
if (bio_data_dir(bio) == WRITE && bi->profile->generate_fn != NULL && |
8288f496e block: Add prefix... |
177 |
(bi->flags & BLK_INTEGRITY_GENERATE)) |
e7258c1a2 block: Get rid of... |
178 |
return true; |
7ba1ba12e block: Block laye... |
179 |
|
e7258c1a2 block: Get rid of... |
180 |
return false; |
7ba1ba12e block: Block laye... |
181 182 183 184 |
} EXPORT_SYMBOL(bio_integrity_enabled); /** |
3be91c4a3 block: Deprecate ... |
185 |
* bio_integrity_intervals - Return number of integrity intervals for a bio |
7ba1ba12e block: Block laye... |
186 |
* @bi: blk_integrity profile for device |
3be91c4a3 block: Deprecate ... |
187 |
* @sectors: Size of the bio in 512-byte sectors |
7ba1ba12e block: Block laye... |
188 189 |
* * Description: The block layer calculates everything in 512 byte |
3be91c4a3 block: Deprecate ... |
190 191 192 |
* sectors but integrity metadata is done in terms of the data integrity * interval size of the storage device. Convert the block layer sectors * to the appropriate number of integrity intervals. |
7ba1ba12e block: Block laye... |
193 |
*/ |
3be91c4a3 block: Deprecate ... |
194 195 |
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi, unsigned int sectors) |
7ba1ba12e block: Block laye... |
196 |
{ |
a48f041d9 block: Reduce the... |
197 |
return sectors >> (bi->interval_exp - 9); |
7ba1ba12e block: Block laye... |
198 |
} |
d57a5f7c6 bio-integrity: Co... |
199 200 201 |
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, unsigned int sectors) { |
3be91c4a3 block: Deprecate ... |
202 |
return bio_integrity_intervals(bi, sectors) * bi->tuple_size; |
d57a5f7c6 bio-integrity: Co... |
203 |
} |
7ba1ba12e block: Block laye... |
204 |
/** |
185930885 block: Clean up t... |
205 |
* bio_integrity_process - Process integrity metadata for a bio |
bf36f9cfa fs/bio-integrity:... |
206 |
* @bio: bio to generate/verify integrity metadata for |
185930885 block: Clean up t... |
207 |
* @proc_fn: Pointer to the relevant processing function |
7ba1ba12e block: Block laye... |
208 |
*/ |
185930885 block: Clean up t... |
209 210 |
static int bio_integrity_process(struct bio *bio, integrity_processing_fn *proc_fn) |
7ba1ba12e block: Block laye... |
211 212 |
{ struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); |
185930885 block: Clean up t... |
213 |
struct blk_integrity_iter iter; |
594416a72 block: fix regres... |
214 215 |
struct bvec_iter bviter; struct bio_vec bv; |
5f9378fa9 block: Remove bip... |
216 |
struct bio_integrity_payload *bip = bio_integrity(bio); |
594416a72 block: fix regres... |
217 |
unsigned int ret = 0; |
5f9378fa9 block: Remove bip... |
218 219 |
void *prot_buf = page_address(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; |
7ba1ba12e block: Block laye... |
220 |
|
185930885 block: Clean up t... |
221 |
iter.disk_name = bio->bi_bdev->bd_disk->disk_name; |
a48f041d9 block: Reduce the... |
222 |
iter.interval = 1 << bi->interval_exp; |
185930885 block: Clean up t... |
223 224 |
iter.seed = bip_get_seed(bip); iter.prot_buf = prot_buf; |
7ba1ba12e block: Block laye... |
225 |
|
594416a72 block: fix regres... |
226 227 |
bio_for_each_segment(bv, bio, bviter) { void *kaddr = kmap_atomic(bv.bv_page); |
7ba1ba12e block: Block laye... |
228 |
|
594416a72 block: fix regres... |
229 230 |
iter.data_buf = kaddr + bv.bv_offset; iter.data_size = bv.bv_len; |
185930885 block: Clean up t... |
231 232 233 234 235 236 |
ret = proc_fn(&iter); if (ret) { kunmap_atomic(kaddr); return ret; } |
7ba1ba12e block: Block laye... |
237 |
|
e8e3c3d66 fs: remove the se... |
238 |
kunmap_atomic(kaddr); |
7ba1ba12e block: Block laye... |
239 |
} |
bf36f9cfa fs/bio-integrity:... |
240 241 242 243 |
return ret; } /** |
7ba1ba12e block: Block laye... |
244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 |
* bio_integrity_prep - Prepare bio for integrity I/O * @bio: bio to prepare * * Description: Allocates a buffer for integrity metadata, maps the * pages and attaches them to a bio. The bio must have data * direction, target device and start sector set priot to calling. In * the WRITE case, integrity metadata will be generated using the * block device's integrity function. In the READ case, the buffer * will be prepared for DMA and a suitable end_io handler set up. */ int bio_integrity_prep(struct bio *bio) { struct bio_integrity_payload *bip; struct blk_integrity *bi; struct request_queue *q; void *buf; unsigned long start, end; unsigned int len, nr_pages; unsigned int bytes, offset, i; |
3be91c4a3 block: Deprecate ... |
263 |
unsigned int intervals; |
7ba1ba12e block: Block laye... |
264 265 266 267 268 |
bi = bdev_get_integrity(bio->bi_bdev); q = bdev_get_queue(bio->bi_bdev); BUG_ON(bi == NULL); BUG_ON(bio_integrity(bio)); |
3be91c4a3 block: Deprecate ... |
269 |
intervals = bio_integrity_intervals(bi, bio_sectors(bio)); |
7ba1ba12e block: Block laye... |
270 271 |
/* Allocate kernel buffer for protection data */ |
3be91c4a3 block: Deprecate ... |
272 |
len = intervals * bi->tuple_size; |
72f465033 bio-integrity.c: ... |
273 |
buf = kmalloc(len, GFP_NOIO | q->bounce_gfp); |
7ba1ba12e block: Block laye... |
274 275 276 |
if (unlikely(buf == NULL)) { printk(KERN_ERR "could not allocate integrity buffer "); |
220eb7fd9 fs/bio-integrity.... |
277 |
return -ENOMEM; |
7ba1ba12e block: Block laye... |
278 279 280 281 282 283 284 285 |
} end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT; start = ((unsigned long) buf) >> PAGE_SHIFT; nr_pages = end - start; /* Allocate bio integrity payload and integrity vectors */ bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages); |
7b6c0f803 blk-integrity: ch... |
286 |
if (IS_ERR(bip)) { |
7ba1ba12e block: Block laye... |
287 288 289 |
printk(KERN_ERR "could not allocate data integrity bioset "); kfree(buf); |
7b6c0f803 blk-integrity: ch... |
290 |
return PTR_ERR(bip); |
7ba1ba12e block: Block laye... |
291 |
} |
b1f013885 block: Relocate b... |
292 |
bip->bip_flags |= BIP_BLOCK_INTEGRITY; |
d57a5f7c6 bio-integrity: Co... |
293 |
bip->bip_iter.bi_size = len; |
185930885 block: Clean up t... |
294 |
bip_set_seed(bip, bio->bi_iter.bi_sector); |
7ba1ba12e block: Block laye... |
295 |
|
aae7df501 block: Integrity ... |
296 297 |
if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) bip->bip_flags |= BIP_IP_CHECKSUM; |
7ba1ba12e block: Block laye... |
298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 |
/* Map it */ offset = offset_in_page(buf); for (i = 0 ; i < nr_pages ; i++) { int ret; bytes = PAGE_SIZE - offset; if (len <= 0) break; if (bytes > len) bytes = len; ret = bio_integrity_add_page(bio, virt_to_page(buf), bytes, offset); if (ret == 0) return 0; if (ret < bytes) break; buf += bytes; len -= bytes; offset = 0; } /* Install custom I/O completion handler if read verify is enabled */ if (bio_data_dir(bio) == READ) { bip->bip_end_io = bio->bi_end_io; bio->bi_end_io = bio_integrity_endio; } /* Auto-generate integrity metadata if this is a write */ if (bio_data_dir(bio) == WRITE) |
0f8087ecd block: Consolidat... |
332 |
bio_integrity_process(bio, bi->profile->generate_fn); |
7ba1ba12e block: Block laye... |
333 334 335 336 337 338 |
return 0; } EXPORT_SYMBOL(bio_integrity_prep); /** |
7ba1ba12e block: Block laye... |
339 340 341 342 343 344 345 346 347 |
* bio_integrity_verify_fn - Integrity I/O completion worker * @work: Work struct stored in bio to be verified * * Description: This workqueue function is called to complete a READ * request. The function verifies the transferred integrity metadata * and then calls the original bio end_io function. */ static void bio_integrity_verify_fn(struct work_struct *work) { |
b984679ef block: integrity ... |
348 |
struct bio_integrity_payload *bip = |
7ba1ba12e block: Block laye... |
349 350 |
container_of(work, struct bio_integrity_payload, bip_work); struct bio *bio = bip->bip_bio; |
185930885 block: Clean up t... |
351 |
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); |
7ba1ba12e block: Block laye... |
352 |
|
0f8087ecd block: Consolidat... |
353 |
bio->bi_error = bio_integrity_process(bio, bi->profile->verify_fn); |
7ba1ba12e block: Block laye... |
354 355 356 |
/* Restore original bio completion handler */ bio->bi_end_io = bip->bip_end_io; |
4246a0b63 block: add a bi_e... |
357 |
bio_endio(bio); |
7ba1ba12e block: Block laye... |
358 359 360 361 362 363 364 365 366 367 368 369 370 371 |
} /** * bio_integrity_endio - Integrity I/O completion function * @bio: Protected bio * @error: Pointer to errno * * Description: Completion for integrity I/O * * Normally I/O completion is done in interrupt context. However, * verifying I/O integrity is a time-consuming task which must be run * in process context. This function postpones completion * accordingly. */ |
4246a0b63 block: add a bi_e... |
372 |
void bio_integrity_endio(struct bio *bio) |
7ba1ba12e block: Block laye... |
373 |
{ |
180b2f95d block: Replace bi... |
374 |
struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12e block: Block laye... |
375 376 |
BUG_ON(bip->bip_bio != bio); |
7b24fc4d7 block: Don't veri... |
377 378 379 380 |
/* In case of an I/O error there is no point in verifying the * integrity metadata. Restore original bio end_io handler * and run it. */ |
4246a0b63 block: add a bi_e... |
381 |
if (bio->bi_error) { |
7b24fc4d7 block: Don't veri... |
382 |
bio->bi_end_io = bip->bip_end_io; |
4246a0b63 block: add a bi_e... |
383 |
bio_endio(bio); |
7b24fc4d7 block: Don't veri... |
384 385 386 |
return; } |
7ba1ba12e block: Block laye... |
387 388 389 390 391 392 |
INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); queue_work(kintegrityd_wq, &bip->bip_work); } EXPORT_SYMBOL(bio_integrity_endio); /** |
7ba1ba12e block: Block laye... |
393 394 395 396 397 398 399 400 401 402 |
* bio_integrity_advance - Advance integrity vector * @bio: bio whose integrity vector to update * @bytes_done: number of data bytes that have been completed * * Description: This function calculates how many integrity bytes the * number of completed data bytes correspond to and advances the * integrity vector accordingly. */ void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) { |
180b2f95d block: Replace bi... |
403 |
struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12e block: Block laye... |
404 |
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); |
d57a5f7c6 bio-integrity: Co... |
405 |
unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); |
7ba1ba12e block: Block laye... |
406 |
|
d57a5f7c6 bio-integrity: Co... |
407 |
bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); |
7ba1ba12e block: Block laye... |
408 409 410 411 412 413 414 415 416 417 418 419 420 421 |
} EXPORT_SYMBOL(bio_integrity_advance); /** * bio_integrity_trim - Trim integrity vector * @bio: bio whose integrity vector to update * @offset: offset to first data sector * @sectors: number of data sectors * * Description: Used to trim the integrity vector in a cloned bio. * The ivec will be advanced corresponding to 'offset' data sectors * and the length will be truncated corresponding to 'len' data * sectors. */ |
b984679ef block: integrity ... |
422 423 |
void bio_integrity_trim(struct bio *bio, unsigned int offset, unsigned int sectors) |
7ba1ba12e block: Block laye... |
424 |
{ |
180b2f95d block: Replace bi... |
425 |
struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12e block: Block laye... |
426 |
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); |
7ba1ba12e block: Block laye... |
427 |
|
d57a5f7c6 bio-integrity: Co... |
428 429 |
bio_integrity_advance(bio, offset << 9); bip->bip_iter.bi_size = bio_integrity_bytes(bi, sectors); |
7ba1ba12e block: Block laye... |
430 431 432 433 |
} EXPORT_SYMBOL(bio_integrity_trim); /** |
7ba1ba12e block: Block laye... |
434 435 436 |
* bio_integrity_clone - Callback for cloning bios with integrity metadata * @bio: New bio * @bio_src: Original bio |
87092698c block: Add gfp_ma... |
437 |
* @gfp_mask: Memory allocation mask |
7ba1ba12e block: Block laye... |
438 439 440 |
* * Description: Called to allocate a bip when cloning a bio */ |
7878cba9f block: Create bip... |
441 |
int bio_integrity_clone(struct bio *bio, struct bio *bio_src, |
1e2a410ff block: Ues bi_poo... |
442 |
gfp_t gfp_mask) |
7ba1ba12e block: Block laye... |
443 |
{ |
180b2f95d block: Replace bi... |
444 |
struct bio_integrity_payload *bip_src = bio_integrity(bio_src); |
7ba1ba12e block: Block laye... |
445 446 447 |
struct bio_integrity_payload *bip; BUG_ON(bip_src == NULL); |
1e2a410ff block: Ues bi_poo... |
448 |
bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt); |
7b6c0f803 blk-integrity: ch... |
449 450 |
if (IS_ERR(bip)) return PTR_ERR(bip); |
7ba1ba12e block: Block laye... |
451 452 453 |
memcpy(bip->bip_vec, bip_src->bip_vec, bip_src->bip_vcnt * sizeof(struct bio_vec)); |
7ba1ba12e block: Block laye... |
454 |
bip->bip_vcnt = bip_src->bip_vcnt; |
d57a5f7c6 bio-integrity: Co... |
455 |
bip->bip_iter = bip_src->bip_iter; |
7ba1ba12e block: Block laye... |
456 457 458 459 |
return 0; } EXPORT_SYMBOL(bio_integrity_clone); |
7878cba9f block: Create bip... |
460 |
int bioset_integrity_create(struct bio_set *bs, int pool_size) |
7ba1ba12e block: Block laye... |
461 |
{ |
a91a2785b block: Require su... |
462 463 |
if (bs->bio_integrity_pool) return 0; |
9f060e223 block: Convert in... |
464 |
bs->bio_integrity_pool = mempool_create_slab_pool(pool_size, bip_slab); |
bc5c8f078 fs/bio-integrity:... |
465 |
if (!bs->bio_integrity_pool) |
9f060e223 block: Convert in... |
466 |
return -1; |
7ba1ba12e block: Block laye... |
467 |
|
a6c39cb4f fs/bio: remove bs... |
468 |
bs->bvec_integrity_pool = biovec_create_pool(pool_size); |
bc5c8f078 fs/bio-integrity:... |
469 470 |
if (!bs->bvec_integrity_pool) { mempool_destroy(bs->bio_integrity_pool); |
7878cba9f block: Create bip... |
471 |
return -1; |
bc5c8f078 fs/bio-integrity:... |
472 |
} |
7878cba9f block: Create bip... |
473 474 475 476 477 478 479 480 481 |
return 0; } EXPORT_SYMBOL(bioset_integrity_create); void bioset_integrity_free(struct bio_set *bs) { if (bs->bio_integrity_pool) mempool_destroy(bs->bio_integrity_pool); |
9f060e223 block: Convert in... |
482 483 |
if (bs->bvec_integrity_pool) |
adbe6991e bio-integrity: Fi... |
484 |
mempool_destroy(bs->bvec_integrity_pool); |
7878cba9f block: Create bip... |
485 486 487 488 489 |
} EXPORT_SYMBOL(bioset_integrity_free); void __init bio_integrity_init(void) { |
a6e8dc46f bio-integrity: ma... |
490 491 492 493 494 495 |
/* * kintegrityd won't block much but may burn a lot of CPU cycles. * Make it highpri CPU intensive wq with max concurrency of 1. */ kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); |
6d2a78e78 block: add privat... |
496 497 498 |
if (!kintegrityd_wq) panic("Failed to create kintegrityd "); |
7ba1ba12e block: Block laye... |
499 |
|
9f060e223 block: Convert in... |
500 501 502 503 |
bip_slab = kmem_cache_create("bio_integrity_payload", sizeof(struct bio_integrity_payload) + sizeof(struct bio_vec) * BIP_INLINE_VECS, 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); |
7ba1ba12e block: Block laye... |
504 |
} |