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 <martin.petersen@oracle.com> |
7ba1ba12 MP |
7 | */ |
8 | ||
9 | #include <linux/blkdev.h> | |
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 | #define BIP_INLINE_VECS 4 |
7878cba9 | 18 | |
9f060e22 | 19 | static struct kmem_cache *bip_slab; |
7ba1ba12 MP |
20 | static struct workqueue_struct *kintegrityd_wq; |
21 | ||
5a48fc14 DW |
22 | void blk_flush_integrity(void) |
23 | { | |
24 | flush_workqueue(kintegrityd_wq); | |
25 | } | |
26 | ||
7ba1ba12 | 27 | /** |
1e2a410f | 28 | * bio_integrity_alloc - Allocate integrity payload and attach it to bio |
7ba1ba12 MP |
29 | * @bio: bio to attach integrity metadata to |
30 | * @gfp_mask: Memory allocation mask | |
31 | * @nr_vecs: Number of integrity metadata scatter-gather elements | |
7ba1ba12 MP |
32 | * |
33 | * Description: This function prepares a bio for attaching integrity | |
34 | * metadata. nr_vecs specifies the maximum number of pages containing | |
35 | * integrity metadata that can be attached. | |
36 | */ | |
1e2a410f KO |
37 | struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, |
38 | gfp_t gfp_mask, | |
39 | unsigned int nr_vecs) | |
7ba1ba12 MP |
40 | { |
41 | struct bio_integrity_payload *bip; | |
1e2a410f | 42 | struct bio_set *bs = bio->bi_pool; |
9f060e22 KO |
43 | unsigned inline_vecs; |
44 | ||
8aa6ba2f | 45 | if (!bs || !mempool_initialized(&bs->bio_integrity_pool)) { |
7a102d90 | 46 | bip = kmalloc(struct_size(bip, bip_inline_vecs, nr_vecs), gfp_mask); |
9f060e22 KO |
47 | inline_vecs = nr_vecs; |
48 | } else { | |
8aa6ba2f | 49 | bip = mempool_alloc(&bs->bio_integrity_pool, gfp_mask); |
9f060e22 | 50 | inline_vecs = BIP_INLINE_VECS; |
7ba1ba12 MP |
51 | } |
52 | ||
9f060e22 | 53 | if (unlikely(!bip)) |
06c1e390 | 54 | return ERR_PTR(-ENOMEM); |
9f060e22 | 55 | |
7878cba9 MP |
56 | memset(bip, 0, sizeof(*bip)); |
57 | ||
9f060e22 | 58 | if (nr_vecs > inline_vecs) { |
ed996a52 CH |
59 | unsigned long idx = 0; |
60 | ||
9f060e22 | 61 | bip->bip_vec = bvec_alloc(gfp_mask, nr_vecs, &idx, |
8aa6ba2f | 62 | &bs->bvec_integrity_pool); |
9f060e22 KO |
63 | if (!bip->bip_vec) |
64 | goto err; | |
cbcd1054 | 65 | bip->bip_max_vcnt = bvec_nr_vecs(idx); |
ed996a52 | 66 | bip->bip_slab = idx; |
9f060e22 KO |
67 | } else { |
68 | bip->bip_vec = bip->bip_inline_vecs; | |
cbcd1054 | 69 | bip->bip_max_vcnt = inline_vecs; |
9f060e22 KO |
70 | } |
71 | ||
7ba1ba12 MP |
72 | bip->bip_bio = bio; |
73 | bio->bi_integrity = bip; | |
1eff9d32 | 74 | bio->bi_opf |= REQ_INTEGRITY; |
7ba1ba12 MP |
75 | |
76 | return bip; | |
9f060e22 | 77 | err: |
8aa6ba2f | 78 | mempool_free(bip, &bs->bio_integrity_pool); |
06c1e390 | 79 | return ERR_PTR(-ENOMEM); |
7ba1ba12 | 80 | } |
7ba1ba12 MP |
81 | EXPORT_SYMBOL(bio_integrity_alloc); |
82 | ||
83 | /** | |
84 | * bio_integrity_free - Free bio integrity payload | |
85 | * @bio: bio containing bip to be freed | |
7ba1ba12 MP |
86 | * |
87 | * Description: Used to free the integrity portion of a bio. Usually | |
88 | * called from bio_free(). | |
89 | */ | |
ece841ab | 90 | void bio_integrity_free(struct bio *bio) |
7ba1ba12 | 91 | { |
180b2f95 | 92 | struct bio_integrity_payload *bip = bio_integrity(bio); |
1e2a410f KO |
93 | struct bio_set *bs = bio->bi_pool; |
94 | ||
b1f01388 | 95 | if (bip->bip_flags & BIP_BLOCK_INTEGRITY) |
5f9378fa MP |
96 | kfree(page_address(bip->bip_vec->bv_page) + |
97 | bip->bip_vec->bv_offset); | |
7ba1ba12 | 98 | |
8aa6ba2f KO |
99 | if (bs && mempool_initialized(&bs->bio_integrity_pool)) { |
100 | bvec_free(&bs->bvec_integrity_pool, bip->bip_vec, bip->bip_slab); | |
9f060e22 | 101 | |
8aa6ba2f | 102 | mempool_free(bip, &bs->bio_integrity_pool); |
9f060e22 KO |
103 | } else { |
104 | kfree(bip); | |
105 | } | |
7ba1ba12 MP |
106 | |
107 | bio->bi_integrity = NULL; | |
7c20f116 | 108 | bio->bi_opf &= ~REQ_INTEGRITY; |
7ba1ba12 | 109 | } |
7ba1ba12 MP |
110 | |
111 | /** | |
112 | * bio_integrity_add_page - Attach integrity metadata | |
113 | * @bio: bio to update | |
114 | * @page: page containing integrity metadata | |
115 | * @len: number of bytes of integrity metadata in page | |
116 | * @offset: start offset within page | |
117 | * | |
118 | * Description: Attach a page containing integrity metadata to bio. | |
119 | */ | |
120 | int bio_integrity_add_page(struct bio *bio, struct page *page, | |
121 | unsigned int len, unsigned int offset) | |
122 | { | |
180b2f95 | 123 | struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12 MP |
124 | struct bio_vec *iv; |
125 | ||
cbcd1054 | 126 | if (bip->bip_vcnt >= bip->bip_max_vcnt) { |
7ba1ba12 MP |
127 | printk(KERN_ERR "%s: bip_vec full\n", __func__); |
128 | return 0; | |
129 | } | |
130 | ||
d57a5f7c | 131 | iv = bip->bip_vec + bip->bip_vcnt; |
7ba1ba12 | 132 | |
87a816df | 133 | if (bip->bip_vcnt && |
74d46992 | 134 | bvec_gap_to_prev(bio->bi_disk->queue, |
87a816df SG |
135 | &bip->bip_vec[bip->bip_vcnt - 1], offset)) |
136 | return 0; | |
137 | ||
7ba1ba12 MP |
138 | iv->bv_page = page; |
139 | iv->bv_len = len; | |
140 | iv->bv_offset = offset; | |
141 | bip->bip_vcnt++; | |
142 | ||
143 | return len; | |
144 | } | |
145 | EXPORT_SYMBOL(bio_integrity_add_page); | |
146 | ||
7ba1ba12 | 147 | /** |
18593088 | 148 | * bio_integrity_process - Process integrity metadata for a bio |
bf36f9cf | 149 | * @bio: bio to generate/verify integrity metadata for |
63573e35 | 150 | * @proc_iter: iterator to process |
18593088 | 151 | * @proc_fn: Pointer to the relevant processing function |
7ba1ba12 | 152 | */ |
4e4cbee9 | 153 | static blk_status_t bio_integrity_process(struct bio *bio, |
63573e35 | 154 | struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) |
7ba1ba12 | 155 | { |
74d46992 | 156 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
18593088 | 157 | struct blk_integrity_iter iter; |
594416a7 DW |
158 | struct bvec_iter bviter; |
159 | struct bio_vec bv; | |
5f9378fa | 160 | struct bio_integrity_payload *bip = bio_integrity(bio); |
4e4cbee9 | 161 | blk_status_t ret = BLK_STS_OK; |
5f9378fa MP |
162 | void *prot_buf = page_address(bip->bip_vec->bv_page) + |
163 | bip->bip_vec->bv_offset; | |
7ba1ba12 | 164 | |
74d46992 | 165 | iter.disk_name = bio->bi_disk->disk_name; |
a48f041d | 166 | iter.interval = 1 << bi->interval_exp; |
63573e35 | 167 | iter.seed = proc_iter->bi_sector; |
18593088 | 168 | iter.prot_buf = prot_buf; |
7ba1ba12 | 169 | |
63573e35 | 170 | __bio_for_each_segment(bv, bio, bviter, *proc_iter) { |
594416a7 | 171 | void *kaddr = kmap_atomic(bv.bv_page); |
7ba1ba12 | 172 | |
594416a7 DW |
173 | iter.data_buf = kaddr + bv.bv_offset; |
174 | iter.data_size = bv.bv_len; | |
18593088 MP |
175 | |
176 | ret = proc_fn(&iter); | |
177 | if (ret) { | |
178 | kunmap_atomic(kaddr); | |
179 | return ret; | |
180 | } | |
7ba1ba12 | 181 | |
e8e3c3d6 | 182 | kunmap_atomic(kaddr); |
7ba1ba12 | 183 | } |
bf36f9cf GZ |
184 | return ret; |
185 | } | |
186 | ||
7ba1ba12 MP |
187 | /** |
188 | * bio_integrity_prep - Prepare bio for integrity I/O | |
189 | * @bio: bio to prepare | |
190 | * | |
e23947bd DM |
191 | * Description: Checks if the bio already has an integrity payload attached. |
192 | * If it does, the payload has been generated by another kernel subsystem, | |
193 | * and we just pass it through. Otherwise allocates integrity payload. | |
194 | * The bio must have data direction, target device and start sector set priot | |
195 | * to calling. In the WRITE case, integrity metadata will be generated using | |
196 | * the block device's integrity function. In the READ case, the buffer | |
7ba1ba12 MP |
197 | * will be prepared for DMA and a suitable end_io handler set up. |
198 | */ | |
e23947bd | 199 | bool bio_integrity_prep(struct bio *bio) |
7ba1ba12 MP |
200 | { |
201 | struct bio_integrity_payload *bip; | |
74d46992 CH |
202 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
203 | struct request_queue *q = bio->bi_disk->queue; | |
7ba1ba12 MP |
204 | void *buf; |
205 | unsigned long start, end; | |
206 | unsigned int len, nr_pages; | |
207 | unsigned int bytes, offset, i; | |
3be91c4a | 208 | unsigned int intervals; |
e23947bd | 209 | blk_status_t status; |
7ba1ba12 | 210 | |
9346beb9 CH |
211 | if (!bi) |
212 | return true; | |
213 | ||
e23947bd DM |
214 | if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE) |
215 | return true; | |
216 | ||
217 | if (!bio_sectors(bio)) | |
218 | return true; | |
7ba1ba12 | 219 | |
e23947bd DM |
220 | /* Already protected? */ |
221 | if (bio_integrity(bio)) | |
222 | return true; | |
223 | ||
e23947bd DM |
224 | if (bio_data_dir(bio) == READ) { |
225 | if (!bi->profile->verify_fn || | |
226 | !(bi->flags & BLK_INTEGRITY_VERIFY)) | |
227 | return true; | |
228 | } else { | |
229 | if (!bi->profile->generate_fn || | |
230 | !(bi->flags & BLK_INTEGRITY_GENERATE)) | |
231 | return true; | |
232 | } | |
3be91c4a | 233 | intervals = bio_integrity_intervals(bi, bio_sectors(bio)); |
7ba1ba12 MP |
234 | |
235 | /* Allocate kernel buffer for protection data */ | |
3be91c4a | 236 | len = intervals * bi->tuple_size; |
72f46503 | 237 | buf = kmalloc(len, GFP_NOIO | q->bounce_gfp); |
e23947bd | 238 | status = BLK_STS_RESOURCE; |
7ba1ba12 MP |
239 | if (unlikely(buf == NULL)) { |
240 | printk(KERN_ERR "could not allocate integrity buffer\n"); | |
e23947bd | 241 | goto err_end_io; |
7ba1ba12 MP |
242 | } |
243 | ||
244 | end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
245 | start = ((unsigned long) buf) >> PAGE_SHIFT; | |
246 | nr_pages = end - start; | |
247 | ||
248 | /* Allocate bio integrity payload and integrity vectors */ | |
249 | bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages); | |
7b6c0f80 | 250 | if (IS_ERR(bip)) { |
7ba1ba12 MP |
251 | printk(KERN_ERR "could not allocate data integrity bioset\n"); |
252 | kfree(buf); | |
e23947bd DM |
253 | status = BLK_STS_RESOURCE; |
254 | goto err_end_io; | |
7ba1ba12 MP |
255 | } |
256 | ||
b1f01388 | 257 | bip->bip_flags |= BIP_BLOCK_INTEGRITY; |
d57a5f7c | 258 | bip->bip_iter.bi_size = len; |
18593088 | 259 | bip_set_seed(bip, bio->bi_iter.bi_sector); |
7ba1ba12 | 260 | |
aae7df50 MP |
261 | if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) |
262 | bip->bip_flags |= BIP_IP_CHECKSUM; | |
263 | ||
7ba1ba12 MP |
264 | /* Map it */ |
265 | offset = offset_in_page(buf); | |
266 | for (i = 0 ; i < nr_pages ; i++) { | |
267 | int ret; | |
268 | bytes = PAGE_SIZE - offset; | |
269 | ||
270 | if (len <= 0) | |
271 | break; | |
272 | ||
273 | if (bytes > len) | |
274 | bytes = len; | |
275 | ||
276 | ret = bio_integrity_add_page(bio, virt_to_page(buf), | |
277 | bytes, offset); | |
278 | ||
e7bf90e5 WW |
279 | if (ret == 0) { |
280 | printk(KERN_ERR "could not attach integrity payload\n"); | |
281 | kfree(buf); | |
282 | status = BLK_STS_RESOURCE; | |
283 | goto err_end_io; | |
284 | } | |
7ba1ba12 MP |
285 | |
286 | if (ret < bytes) | |
287 | break; | |
288 | ||
289 | buf += bytes; | |
290 | len -= bytes; | |
291 | offset = 0; | |
292 | } | |
293 | ||
7ba1ba12 | 294 | /* Auto-generate integrity metadata if this is a write */ |
63573e35 DM |
295 | if (bio_data_dir(bio) == WRITE) { |
296 | bio_integrity_process(bio, &bio->bi_iter, | |
297 | bi->profile->generate_fn); | |
7759eb23 ML |
298 | } else { |
299 | bip->bio_iter = bio->bi_iter; | |
63573e35 | 300 | } |
e23947bd DM |
301 | return true; |
302 | ||
303 | err_end_io: | |
304 | bio->bi_status = status; | |
305 | bio_endio(bio); | |
306 | return false; | |
7ba1ba12 | 307 | |
7ba1ba12 MP |
308 | } |
309 | EXPORT_SYMBOL(bio_integrity_prep); | |
310 | ||
7ba1ba12 MP |
311 | /** |
312 | * bio_integrity_verify_fn - Integrity I/O completion worker | |
313 | * @work: Work struct stored in bio to be verified | |
314 | * | |
315 | * Description: This workqueue function is called to complete a READ | |
316 | * request. The function verifies the transferred integrity metadata | |
317 | * and then calls the original bio end_io function. | |
318 | */ | |
319 | static void bio_integrity_verify_fn(struct work_struct *work) | |
320 | { | |
b984679e | 321 | struct bio_integrity_payload *bip = |
7ba1ba12 MP |
322 | container_of(work, struct bio_integrity_payload, bip_work); |
323 | struct bio *bio = bip->bip_bio; | |
74d46992 | 324 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
63573e35 DM |
325 | |
326 | /* | |
327 | * At the moment verify is called bio's iterator was advanced | |
328 | * during split and completion, we need to rewind iterator to | |
329 | * it's original position. | |
330 | */ | |
7759eb23 ML |
331 | bio->bi_status = bio_integrity_process(bio, &bip->bio_iter, |
332 | bi->profile->verify_fn); | |
7c20f116 | 333 | bio_integrity_free(bio); |
4246a0b6 | 334 | bio_endio(bio); |
7ba1ba12 MP |
335 | } |
336 | ||
337 | /** | |
7c20f116 | 338 | * __bio_integrity_endio - Integrity I/O completion function |
7ba1ba12 | 339 | * @bio: Protected bio |
7ba1ba12 MP |
340 | * |
341 | * Description: Completion for integrity I/O | |
342 | * | |
343 | * Normally I/O completion is done in interrupt context. However, | |
344 | * verifying I/O integrity is a time-consuming task which must be run | |
345 | * in process context. This function postpones completion | |
346 | * accordingly. | |
347 | */ | |
7c20f116 | 348 | bool __bio_integrity_endio(struct bio *bio) |
7ba1ba12 | 349 | { |
97e05463 | 350 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
f86e28c4 | 351 | struct bio_integrity_payload *bip = bio_integrity(bio); |
c775d209 MB |
352 | |
353 | if (bio_op(bio) == REQ_OP_READ && !bio->bi_status && | |
f86e28c4 | 354 | (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) { |
7c20f116 CH |
355 | INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); |
356 | queue_work(kintegrityd_wq, &bip->bip_work); | |
357 | return false; | |
7b24fc4d MP |
358 | } |
359 | ||
7c20f116 CH |
360 | bio_integrity_free(bio); |
361 | return true; | |
7ba1ba12 | 362 | } |
7ba1ba12 | 363 | |
7ba1ba12 MP |
364 | /** |
365 | * bio_integrity_advance - Advance integrity vector | |
366 | * @bio: bio whose integrity vector to update | |
367 | * @bytes_done: number of data bytes that have been completed | |
368 | * | |
369 | * Description: This function calculates how many integrity bytes the | |
370 | * number of completed data bytes correspond to and advances the | |
371 | * integrity vector accordingly. | |
372 | */ | |
373 | void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) | |
374 | { | |
180b2f95 | 375 | struct bio_integrity_payload *bip = bio_integrity(bio); |
74d46992 | 376 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
d57a5f7c | 377 | unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); |
7ba1ba12 | 378 | |
309a62fa | 379 | bip->bip_iter.bi_sector += bytes_done >> 9; |
d57a5f7c | 380 | bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); |
7ba1ba12 | 381 | } |
7ba1ba12 MP |
382 | |
383 | /** | |
384 | * bio_integrity_trim - Trim integrity vector | |
385 | * @bio: bio whose integrity vector to update | |
7ba1ba12 MP |
386 | * |
387 | * Description: Used to trim the integrity vector in a cloned bio. | |
7ba1ba12 | 388 | */ |
fbd08e76 | 389 | void bio_integrity_trim(struct bio *bio) |
7ba1ba12 | 390 | { |
180b2f95 | 391 | struct bio_integrity_payload *bip = bio_integrity(bio); |
74d46992 | 392 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
7ba1ba12 | 393 | |
fbd08e76 | 394 | bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); |
7ba1ba12 MP |
395 | } |
396 | EXPORT_SYMBOL(bio_integrity_trim); | |
397 | ||
7ba1ba12 MP |
398 | /** |
399 | * bio_integrity_clone - Callback for cloning bios with integrity metadata | |
400 | * @bio: New bio | |
401 | * @bio_src: Original bio | |
87092698 | 402 | * @gfp_mask: Memory allocation mask |
7ba1ba12 MP |
403 | * |
404 | * Description: Called to allocate a bip when cloning a bio | |
405 | */ | |
7878cba9 | 406 | int bio_integrity_clone(struct bio *bio, struct bio *bio_src, |
1e2a410f | 407 | gfp_t gfp_mask) |
7ba1ba12 | 408 | { |
180b2f95 | 409 | struct bio_integrity_payload *bip_src = bio_integrity(bio_src); |
7ba1ba12 MP |
410 | struct bio_integrity_payload *bip; |
411 | ||
412 | BUG_ON(bip_src == NULL); | |
413 | ||
1e2a410f | 414 | bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt); |
7b6c0f80 DC |
415 | if (IS_ERR(bip)) |
416 | return PTR_ERR(bip); | |
7ba1ba12 MP |
417 | |
418 | memcpy(bip->bip_vec, bip_src->bip_vec, | |
419 | bip_src->bip_vcnt * sizeof(struct bio_vec)); | |
420 | ||
7ba1ba12 | 421 | bip->bip_vcnt = bip_src->bip_vcnt; |
d57a5f7c | 422 | bip->bip_iter = bip_src->bip_iter; |
7ba1ba12 MP |
423 | |
424 | return 0; | |
425 | } | |
426 | EXPORT_SYMBOL(bio_integrity_clone); | |
427 | ||
7878cba9 | 428 | int bioset_integrity_create(struct bio_set *bs, int pool_size) |
7ba1ba12 | 429 | { |
8aa6ba2f | 430 | if (mempool_initialized(&bs->bio_integrity_pool)) |
a91a2785 MP |
431 | return 0; |
432 | ||
8aa6ba2f KO |
433 | if (mempool_init_slab_pool(&bs->bio_integrity_pool, |
434 | pool_size, bip_slab)) | |
9f060e22 | 435 | return -1; |
7ba1ba12 | 436 | |
8aa6ba2f KO |
437 | if (biovec_init_pool(&bs->bvec_integrity_pool, pool_size)) { |
438 | mempool_exit(&bs->bio_integrity_pool); | |
7878cba9 | 439 | return -1; |
bc5c8f07 | 440 | } |
7878cba9 MP |
441 | |
442 | return 0; | |
443 | } | |
444 | EXPORT_SYMBOL(bioset_integrity_create); | |
445 | ||
446 | void bioset_integrity_free(struct bio_set *bs) | |
447 | { | |
8aa6ba2f KO |
448 | mempool_exit(&bs->bio_integrity_pool); |
449 | mempool_exit(&bs->bvec_integrity_pool); | |
7878cba9 | 450 | } |
7878cba9 MP |
451 | |
452 | void __init bio_integrity_init(void) | |
453 | { | |
a6e8dc46 TH |
454 | /* |
455 | * kintegrityd won't block much but may burn a lot of CPU cycles. | |
456 | * Make it highpri CPU intensive wq with max concurrency of 1. | |
457 | */ | |
458 | kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | | |
459 | WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); | |
6d2a78e7 MP |
460 | if (!kintegrityd_wq) |
461 | panic("Failed to create kintegrityd\n"); | |
7ba1ba12 | 462 | |
9f060e22 KO |
463 | bip_slab = kmem_cache_create("bio_integrity_payload", |
464 | sizeof(struct bio_integrity_payload) + | |
465 | sizeof(struct bio_vec) * BIP_INLINE_VECS, | |
466 | 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); | |
7ba1ba12 | 467 | } |