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Commit | Line | Data |
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8c16567d | 1 | // SPDX-License-Identifier: GPL-2.0 |
7ba1ba12 MP |
2 | /* |
3 | * bio-integrity.c - bio data integrity extensions | |
4 | * | |
7878cba9 | 5 | * Copyright (C) 2007, 2008, 2009 Oracle Corporation |
7ba1ba12 | 6 | * Written by: Martin K. Petersen <[email protected]> |
7ba1ba12 MP |
7 | */ |
8 | ||
fe45e630 | 9 | #include <linux/blk-integrity.h> |
7ba1ba12 | 10 | #include <linux/mempool.h> |
afeacc8c | 11 | #include <linux/export.h> |
7ba1ba12 MP |
12 | #include <linux/bio.h> |
13 | #include <linux/workqueue.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
1179a5a0 | 15 | #include "blk.h" |
7ba1ba12 | 16 | |
9f060e22 | 17 | static struct kmem_cache *bip_slab; |
7ba1ba12 MP |
18 | static struct workqueue_struct *kintegrityd_wq; |
19 | ||
5a48fc14 DW |
20 | void blk_flush_integrity(void) |
21 | { | |
22 | flush_workqueue(kintegrityd_wq); | |
23 | } | |
24 | ||
3197d48a WY |
25 | static void __bio_integrity_free(struct bio_set *bs, |
26 | struct bio_integrity_payload *bip) | |
0b8eb629 CX |
27 | { |
28 | if (bs && mempool_initialized(&bs->bio_integrity_pool)) { | |
29 | if (bip->bip_vec) | |
30 | bvec_free(&bs->bvec_integrity_pool, bip->bip_vec, | |
7a800a20 | 31 | bip->bip_max_vcnt); |
0b8eb629 CX |
32 | mempool_free(bip, &bs->bio_integrity_pool); |
33 | } else { | |
34 | kfree(bip); | |
35 | } | |
36 | } | |
37 | ||
7ba1ba12 | 38 | /** |
1e2a410f | 39 | * bio_integrity_alloc - Allocate integrity payload and attach it to bio |
7ba1ba12 MP |
40 | * @bio: bio to attach integrity metadata to |
41 | * @gfp_mask: Memory allocation mask | |
42 | * @nr_vecs: Number of integrity metadata scatter-gather elements | |
7ba1ba12 MP |
43 | * |
44 | * Description: This function prepares a bio for attaching integrity | |
45 | * metadata. nr_vecs specifies the maximum number of pages containing | |
46 | * integrity metadata that can be attached. | |
47 | */ | |
1e2a410f KO |
48 | struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, |
49 | gfp_t gfp_mask, | |
50 | unsigned int nr_vecs) | |
7ba1ba12 MP |
51 | { |
52 | struct bio_integrity_payload *bip; | |
1e2a410f | 53 | struct bio_set *bs = bio->bi_pool; |
9f060e22 KO |
54 | unsigned inline_vecs; |
55 | ||
d145dc23 ST |
56 | if (WARN_ON_ONCE(bio_has_crypt_ctx(bio))) |
57 | return ERR_PTR(-EOPNOTSUPP); | |
58 | ||
8aa6ba2f | 59 | if (!bs || !mempool_initialized(&bs->bio_integrity_pool)) { |
7a102d90 | 60 | bip = kmalloc(struct_size(bip, bip_inline_vecs, nr_vecs), gfp_mask); |
9f060e22 KO |
61 | inline_vecs = nr_vecs; |
62 | } else { | |
8aa6ba2f | 63 | bip = mempool_alloc(&bs->bio_integrity_pool, gfp_mask); |
dc0b8a57 | 64 | inline_vecs = BIO_INLINE_VECS; |
7ba1ba12 MP |
65 | } |
66 | ||
9f060e22 | 67 | if (unlikely(!bip)) |
06c1e390 | 68 | return ERR_PTR(-ENOMEM); |
9f060e22 | 69 | |
7878cba9 MP |
70 | memset(bip, 0, sizeof(*bip)); |
71 | ||
9f060e22 | 72 | if (nr_vecs > inline_vecs) { |
7a800a20 CH |
73 | bip->bip_max_vcnt = nr_vecs; |
74 | bip->bip_vec = bvec_alloc(&bs->bvec_integrity_pool, | |
75 | &bip->bip_max_vcnt, gfp_mask); | |
9f060e22 KO |
76 | if (!bip->bip_vec) |
77 | goto err; | |
78 | } else { | |
79 | bip->bip_vec = bip->bip_inline_vecs; | |
cbcd1054 | 80 | bip->bip_max_vcnt = inline_vecs; |
9f060e22 KO |
81 | } |
82 | ||
7ba1ba12 MP |
83 | bip->bip_bio = bio; |
84 | bio->bi_integrity = bip; | |
1eff9d32 | 85 | bio->bi_opf |= REQ_INTEGRITY; |
7ba1ba12 MP |
86 | |
87 | return bip; | |
9f060e22 | 88 | err: |
0b8eb629 | 89 | __bio_integrity_free(bs, bip); |
06c1e390 | 90 | return ERR_PTR(-ENOMEM); |
7ba1ba12 | 91 | } |
7ba1ba12 MP |
92 | EXPORT_SYMBOL(bio_integrity_alloc); |
93 | ||
94 | /** | |
95 | * bio_integrity_free - Free bio integrity payload | |
96 | * @bio: bio containing bip to be freed | |
7ba1ba12 MP |
97 | * |
98 | * Description: Used to free the integrity portion of a bio. Usually | |
99 | * called from bio_free(). | |
100 | */ | |
ece841ab | 101 | void bio_integrity_free(struct bio *bio) |
7ba1ba12 | 102 | { |
180b2f95 | 103 | struct bio_integrity_payload *bip = bio_integrity(bio); |
1e2a410f KO |
104 | struct bio_set *bs = bio->bi_pool; |
105 | ||
b1f01388 | 106 | if (bip->bip_flags & BIP_BLOCK_INTEGRITY) |
b93ef453 | 107 | kfree(bvec_virt(bip->bip_vec)); |
7ba1ba12 | 108 | |
0b8eb629 | 109 | __bio_integrity_free(bs, bip); |
7ba1ba12 | 110 | bio->bi_integrity = NULL; |
7c20f116 | 111 | bio->bi_opf &= ~REQ_INTEGRITY; |
7ba1ba12 | 112 | } |
7ba1ba12 MP |
113 | |
114 | /** | |
115 | * bio_integrity_add_page - Attach integrity metadata | |
116 | * @bio: bio to update | |
117 | * @page: page containing integrity metadata | |
118 | * @len: number of bytes of integrity metadata in page | |
119 | * @offset: start offset within page | |
120 | * | |
121 | * Description: Attach a page containing integrity metadata to bio. | |
122 | */ | |
123 | int bio_integrity_add_page(struct bio *bio, struct page *page, | |
124 | unsigned int len, unsigned int offset) | |
125 | { | |
0ece1d64 | 126 | struct request_queue *q = bdev_get_queue(bio->bi_bdev); |
180b2f95 | 127 | struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12 | 128 | |
0ece1d64 JC |
129 | if (((bip->bip_iter.bi_size + len) >> SECTOR_SHIFT) > |
130 | queue_max_hw_sectors(q)) | |
7ba1ba12 | 131 | return 0; |
7ba1ba12 | 132 | |
0ece1d64 JC |
133 | if (bip->bip_vcnt > 0) { |
134 | struct bio_vec *bv = &bip->bip_vec[bip->bip_vcnt - 1]; | |
135 | bool same_page = false; | |
136 | ||
137 | if (bvec_try_merge_hw_page(q, bv, page, len, offset, | |
138 | &same_page)) { | |
139 | bip->bip_iter.bi_size += len; | |
140 | return len; | |
141 | } | |
142 | ||
143 | if (bip->bip_vcnt >= | |
144 | min(bip->bip_max_vcnt, queue_max_integrity_segments(q))) | |
145 | return 0; | |
146 | ||
147 | /* | |
148 | * If the queue doesn't support SG gaps and adding this segment | |
149 | * would create a gap, disallow it. | |
150 | */ | |
151 | if (bvec_gap_to_prev(&q->limits, bv, offset)) | |
152 | return 0; | |
153 | } | |
87a816df | 154 | |
d58cdfae | 155 | bvec_set_page(&bip->bip_vec[bip->bip_vcnt], page, len, offset); |
7ba1ba12 | 156 | bip->bip_vcnt++; |
80814b8e | 157 | bip->bip_iter.bi_size += len; |
7ba1ba12 MP |
158 | |
159 | return len; | |
160 | } | |
161 | EXPORT_SYMBOL(bio_integrity_add_page); | |
162 | ||
7ba1ba12 | 163 | /** |
18593088 | 164 | * bio_integrity_process - Process integrity metadata for a bio |
bf36f9cf | 165 | * @bio: bio to generate/verify integrity metadata for |
63573e35 | 166 | * @proc_iter: iterator to process |
18593088 | 167 | * @proc_fn: Pointer to the relevant processing function |
7ba1ba12 | 168 | */ |
4e4cbee9 | 169 | static blk_status_t bio_integrity_process(struct bio *bio, |
63573e35 | 170 | struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) |
7ba1ba12 | 171 | { |
309dca30 | 172 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
18593088 | 173 | struct blk_integrity_iter iter; |
594416a7 DW |
174 | struct bvec_iter bviter; |
175 | struct bio_vec bv; | |
5f9378fa | 176 | struct bio_integrity_payload *bip = bio_integrity(bio); |
4e4cbee9 | 177 | blk_status_t ret = BLK_STS_OK; |
7ba1ba12 | 178 | |
309dca30 | 179 | iter.disk_name = bio->bi_bdev->bd_disk->disk_name; |
a48f041d | 180 | iter.interval = 1 << bi->interval_exp; |
c340b990 | 181 | iter.tuple_size = bi->tuple_size; |
63573e35 | 182 | iter.seed = proc_iter->bi_sector; |
b93ef453 | 183 | iter.prot_buf = bvec_virt(bip->bip_vec); |
7ba1ba12 | 184 | |
63573e35 | 185 | __bio_for_each_segment(bv, bio, bviter, *proc_iter) { |
503469b5 | 186 | void *kaddr = bvec_kmap_local(&bv); |
7ba1ba12 | 187 | |
503469b5 | 188 | iter.data_buf = kaddr; |
594416a7 | 189 | iter.data_size = bv.bv_len; |
18593088 | 190 | ret = proc_fn(&iter); |
503469b5 CH |
191 | kunmap_local(kaddr); |
192 | ||
193 | if (ret) | |
194 | break; | |
7ba1ba12 | 195 | |
7ba1ba12 | 196 | } |
bf36f9cf GZ |
197 | return ret; |
198 | } | |
199 | ||
7ba1ba12 MP |
200 | /** |
201 | * bio_integrity_prep - Prepare bio for integrity I/O | |
202 | * @bio: bio to prepare | |
203 | * | |
e23947bd DM |
204 | * Description: Checks if the bio already has an integrity payload attached. |
205 | * If it does, the payload has been generated by another kernel subsystem, | |
206 | * and we just pass it through. Otherwise allocates integrity payload. | |
207 | * The bio must have data direction, target device and start sector set priot | |
208 | * to calling. In the WRITE case, integrity metadata will be generated using | |
209 | * the block device's integrity function. In the READ case, the buffer | |
7ba1ba12 MP |
210 | * will be prepared for DMA and a suitable end_io handler set up. |
211 | */ | |
e23947bd | 212 | bool bio_integrity_prep(struct bio *bio) |
7ba1ba12 MP |
213 | { |
214 | struct bio_integrity_payload *bip; | |
309dca30 | 215 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
7ba1ba12 MP |
216 | void *buf; |
217 | unsigned long start, end; | |
218 | unsigned int len, nr_pages; | |
219 | unsigned int bytes, offset, i; | |
7ba1ba12 | 220 | |
9346beb9 CH |
221 | if (!bi) |
222 | return true; | |
223 | ||
e23947bd DM |
224 | if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE) |
225 | return true; | |
226 | ||
227 | if (!bio_sectors(bio)) | |
228 | return true; | |
7ba1ba12 | 229 | |
e23947bd DM |
230 | /* Already protected? */ |
231 | if (bio_integrity(bio)) | |
232 | return true; | |
233 | ||
e23947bd DM |
234 | if (bio_data_dir(bio) == READ) { |
235 | if (!bi->profile->verify_fn || | |
236 | !(bi->flags & BLK_INTEGRITY_VERIFY)) | |
237 | return true; | |
238 | } else { | |
239 | if (!bi->profile->generate_fn || | |
240 | !(bi->flags & BLK_INTEGRITY_GENERATE)) | |
241 | return true; | |
242 | } | |
7ba1ba12 MP |
243 | |
244 | /* Allocate kernel buffer for protection data */ | |
8f63fef5 | 245 | len = bio_integrity_bytes(bi, bio_sectors(bio)); |
ce288e05 | 246 | buf = kmalloc(len, GFP_NOIO); |
7ba1ba12 MP |
247 | if (unlikely(buf == NULL)) { |
248 | printk(KERN_ERR "could not allocate integrity buffer\n"); | |
e23947bd | 249 | goto err_end_io; |
7ba1ba12 MP |
250 | } |
251 | ||
252 | end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
253 | start = ((unsigned long) buf) >> PAGE_SHIFT; | |
254 | nr_pages = end - start; | |
255 | ||
256 | /* Allocate bio integrity payload and integrity vectors */ | |
257 | bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages); | |
7b6c0f80 | 258 | if (IS_ERR(bip)) { |
7ba1ba12 MP |
259 | printk(KERN_ERR "could not allocate data integrity bioset\n"); |
260 | kfree(buf); | |
e23947bd | 261 | goto err_end_io; |
7ba1ba12 MP |
262 | } |
263 | ||
b1f01388 | 264 | bip->bip_flags |= BIP_BLOCK_INTEGRITY; |
18593088 | 265 | bip_set_seed(bip, bio->bi_iter.bi_sector); |
7ba1ba12 | 266 | |
aae7df50 MP |
267 | if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) |
268 | bip->bip_flags |= BIP_IP_CHECKSUM; | |
269 | ||
7ba1ba12 MP |
270 | /* Map it */ |
271 | offset = offset_in_page(buf); | |
d1f04c2e | 272 | for (i = 0; i < nr_pages && len > 0; i++) { |
7ba1ba12 MP |
273 | bytes = PAGE_SIZE - offset; |
274 | ||
7ba1ba12 MP |
275 | if (bytes > len) |
276 | bytes = len; | |
277 | ||
d1f04c2e JC |
278 | if (bio_integrity_add_page(bio, virt_to_page(buf), |
279 | bytes, offset) < bytes) { | |
e7bf90e5 | 280 | printk(KERN_ERR "could not attach integrity payload\n"); |
e7bf90e5 WW |
281 | goto err_end_io; |
282 | } | |
7ba1ba12 | 283 | |
7ba1ba12 MP |
284 | buf += bytes; |
285 | len -= bytes; | |
286 | offset = 0; | |
287 | } | |
288 | ||
7ba1ba12 | 289 | /* Auto-generate integrity metadata if this is a write */ |
63573e35 DM |
290 | if (bio_data_dir(bio) == WRITE) { |
291 | bio_integrity_process(bio, &bio->bi_iter, | |
292 | bi->profile->generate_fn); | |
7759eb23 ML |
293 | } else { |
294 | bip->bio_iter = bio->bi_iter; | |
63573e35 | 295 | } |
e23947bd DM |
296 | return true; |
297 | ||
298 | err_end_io: | |
51d74ec9 | 299 | bio->bi_status = BLK_STS_RESOURCE; |
e23947bd DM |
300 | bio_endio(bio); |
301 | return false; | |
7ba1ba12 MP |
302 | } |
303 | EXPORT_SYMBOL(bio_integrity_prep); | |
304 | ||
7ba1ba12 MP |
305 | /** |
306 | * bio_integrity_verify_fn - Integrity I/O completion worker | |
307 | * @work: Work struct stored in bio to be verified | |
308 | * | |
309 | * Description: This workqueue function is called to complete a READ | |
310 | * request. The function verifies the transferred integrity metadata | |
311 | * and then calls the original bio end_io function. | |
312 | */ | |
313 | static void bio_integrity_verify_fn(struct work_struct *work) | |
314 | { | |
b984679e | 315 | struct bio_integrity_payload *bip = |
7ba1ba12 MP |
316 | container_of(work, struct bio_integrity_payload, bip_work); |
317 | struct bio *bio = bip->bip_bio; | |
309dca30 | 318 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
63573e35 DM |
319 | |
320 | /* | |
321 | * At the moment verify is called bio's iterator was advanced | |
322 | * during split and completion, we need to rewind iterator to | |
323 | * it's original position. | |
324 | */ | |
7759eb23 ML |
325 | bio->bi_status = bio_integrity_process(bio, &bip->bio_iter, |
326 | bi->profile->verify_fn); | |
7c20f116 | 327 | bio_integrity_free(bio); |
4246a0b6 | 328 | bio_endio(bio); |
7ba1ba12 MP |
329 | } |
330 | ||
331 | /** | |
7c20f116 | 332 | * __bio_integrity_endio - Integrity I/O completion function |
7ba1ba12 | 333 | * @bio: Protected bio |
7ba1ba12 MP |
334 | * |
335 | * Description: Completion for integrity I/O | |
336 | * | |
337 | * Normally I/O completion is done in interrupt context. However, | |
338 | * verifying I/O integrity is a time-consuming task which must be run | |
339 | * in process context. This function postpones completion | |
340 | * accordingly. | |
341 | */ | |
7c20f116 | 342 | bool __bio_integrity_endio(struct bio *bio) |
7ba1ba12 | 343 | { |
309dca30 | 344 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
f86e28c4 | 345 | struct bio_integrity_payload *bip = bio_integrity(bio); |
c775d209 MB |
346 | |
347 | if (bio_op(bio) == REQ_OP_READ && !bio->bi_status && | |
f86e28c4 | 348 | (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) { |
7c20f116 CH |
349 | INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); |
350 | queue_work(kintegrityd_wq, &bip->bip_work); | |
351 | return false; | |
7b24fc4d MP |
352 | } |
353 | ||
7c20f116 CH |
354 | bio_integrity_free(bio); |
355 | return true; | |
7ba1ba12 | 356 | } |
7ba1ba12 | 357 | |
7ba1ba12 MP |
358 | /** |
359 | * bio_integrity_advance - Advance integrity vector | |
360 | * @bio: bio whose integrity vector to update | |
361 | * @bytes_done: number of data bytes that have been completed | |
362 | * | |
363 | * Description: This function calculates how many integrity bytes the | |
364 | * number of completed data bytes correspond to and advances the | |
365 | * integrity vector accordingly. | |
366 | */ | |
367 | void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) | |
368 | { | |
180b2f95 | 369 | struct bio_integrity_payload *bip = bio_integrity(bio); |
309dca30 | 370 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
d57a5f7c | 371 | unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); |
7ba1ba12 | 372 | |
b13e0c71 | 373 | bip->bip_iter.bi_sector += bio_integrity_intervals(bi, bytes_done >> 9); |
d57a5f7c | 374 | bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); |
7ba1ba12 | 375 | } |
7ba1ba12 MP |
376 | |
377 | /** | |
378 | * bio_integrity_trim - Trim integrity vector | |
379 | * @bio: bio whose integrity vector to update | |
7ba1ba12 MP |
380 | * |
381 | * Description: Used to trim the integrity vector in a cloned bio. | |
7ba1ba12 | 382 | */ |
fbd08e76 | 383 | void bio_integrity_trim(struct bio *bio) |
7ba1ba12 | 384 | { |
180b2f95 | 385 | struct bio_integrity_payload *bip = bio_integrity(bio); |
309dca30 | 386 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
7ba1ba12 | 387 | |
fbd08e76 | 388 | bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); |
7ba1ba12 MP |
389 | } |
390 | EXPORT_SYMBOL(bio_integrity_trim); | |
391 | ||
7ba1ba12 MP |
392 | /** |
393 | * bio_integrity_clone - Callback for cloning bios with integrity metadata | |
394 | * @bio: New bio | |
395 | * @bio_src: Original bio | |
87092698 | 396 | * @gfp_mask: Memory allocation mask |
7ba1ba12 MP |
397 | * |
398 | * Description: Called to allocate a bip when cloning a bio | |
399 | */ | |
7878cba9 | 400 | int bio_integrity_clone(struct bio *bio, struct bio *bio_src, |
1e2a410f | 401 | gfp_t gfp_mask) |
7ba1ba12 | 402 | { |
180b2f95 | 403 | struct bio_integrity_payload *bip_src = bio_integrity(bio_src); |
7ba1ba12 MP |
404 | struct bio_integrity_payload *bip; |
405 | ||
406 | BUG_ON(bip_src == NULL); | |
407 | ||
1e2a410f | 408 | bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt); |
7b6c0f80 DC |
409 | if (IS_ERR(bip)) |
410 | return PTR_ERR(bip); | |
7ba1ba12 MP |
411 | |
412 | memcpy(bip->bip_vec, bip_src->bip_vec, | |
413 | bip_src->bip_vcnt * sizeof(struct bio_vec)); | |
414 | ||
7ba1ba12 | 415 | bip->bip_vcnt = bip_src->bip_vcnt; |
d57a5f7c | 416 | bip->bip_iter = bip_src->bip_iter; |
b6a4bdcd | 417 | bip->bip_flags = bip_src->bip_flags & ~BIP_BLOCK_INTEGRITY; |
7ba1ba12 MP |
418 | |
419 | return 0; | |
420 | } | |
7ba1ba12 | 421 | |
7878cba9 | 422 | int bioset_integrity_create(struct bio_set *bs, int pool_size) |
7ba1ba12 | 423 | { |
8aa6ba2f | 424 | if (mempool_initialized(&bs->bio_integrity_pool)) |
a91a2785 MP |
425 | return 0; |
426 | ||
8aa6ba2f KO |
427 | if (mempool_init_slab_pool(&bs->bio_integrity_pool, |
428 | pool_size, bip_slab)) | |
9f060e22 | 429 | return -1; |
7ba1ba12 | 430 | |
8aa6ba2f KO |
431 | if (biovec_init_pool(&bs->bvec_integrity_pool, pool_size)) { |
432 | mempool_exit(&bs->bio_integrity_pool); | |
7878cba9 | 433 | return -1; |
bc5c8f07 | 434 | } |
7878cba9 MP |
435 | |
436 | return 0; | |
437 | } | |
438 | EXPORT_SYMBOL(bioset_integrity_create); | |
439 | ||
440 | void bioset_integrity_free(struct bio_set *bs) | |
441 | { | |
8aa6ba2f KO |
442 | mempool_exit(&bs->bio_integrity_pool); |
443 | mempool_exit(&bs->bvec_integrity_pool); | |
7878cba9 | 444 | } |
7878cba9 MP |
445 | |
446 | void __init bio_integrity_init(void) | |
447 | { | |
a6e8dc46 TH |
448 | /* |
449 | * kintegrityd won't block much but may burn a lot of CPU cycles. | |
450 | * Make it highpri CPU intensive wq with max concurrency of 1. | |
451 | */ | |
452 | kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | | |
453 | WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); | |
6d2a78e7 MP |
454 | if (!kintegrityd_wq) |
455 | panic("Failed to create kintegrityd\n"); | |
7ba1ba12 | 456 | |
9f060e22 KO |
457 | bip_slab = kmem_cache_create("bio_integrity_payload", |
458 | sizeof(struct bio_integrity_payload) + | |
dc0b8a57 | 459 | sizeof(struct bio_vec) * BIO_INLINE_VECS, |
9f060e22 | 460 | 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); |
7ba1ba12 | 461 | } |