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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 | ||
e878ae19 CX |
27 | void __bio_integrity_free(struct bio_set *bs, struct bio_integrity_payload *bip) |
28 | { | |
29 | if (bs && mempool_initialized(&bs->bio_integrity_pool)) { | |
30 | if (bip->bip_vec) | |
31 | bvec_free(&bs->bvec_integrity_pool, bip->bip_vec, | |
32 | bip->bip_slab); | |
33 | mempool_free(bip, &bs->bio_integrity_pool); | |
34 | } else { | |
35 | kfree(bip); | |
36 | } | |
37 | } | |
38 | ||
7ba1ba12 | 39 | /** |
1e2a410f | 40 | * bio_integrity_alloc - Allocate integrity payload and attach it to bio |
7ba1ba12 MP |
41 | * @bio: bio to attach integrity metadata to |
42 | * @gfp_mask: Memory allocation mask | |
43 | * @nr_vecs: Number of integrity metadata scatter-gather elements | |
7ba1ba12 MP |
44 | * |
45 | * Description: This function prepares a bio for attaching integrity | |
46 | * metadata. nr_vecs specifies the maximum number of pages containing | |
47 | * integrity metadata that can be attached. | |
48 | */ | |
1e2a410f KO |
49 | struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, |
50 | gfp_t gfp_mask, | |
51 | unsigned int nr_vecs) | |
7ba1ba12 MP |
52 | { |
53 | struct bio_integrity_payload *bip; | |
1e2a410f | 54 | struct bio_set *bs = bio->bi_pool; |
9f060e22 KO |
55 | unsigned inline_vecs; |
56 | ||
8aa6ba2f | 57 | if (!bs || !mempool_initialized(&bs->bio_integrity_pool)) { |
7a102d90 | 58 | bip = kmalloc(struct_size(bip, bip_inline_vecs, nr_vecs), gfp_mask); |
9f060e22 KO |
59 | inline_vecs = nr_vecs; |
60 | } else { | |
8aa6ba2f | 61 | bip = mempool_alloc(&bs->bio_integrity_pool, gfp_mask); |
9f060e22 | 62 | inline_vecs = BIP_INLINE_VECS; |
7ba1ba12 MP |
63 | } |
64 | ||
9f060e22 | 65 | if (unlikely(!bip)) |
06c1e390 | 66 | return ERR_PTR(-ENOMEM); |
9f060e22 | 67 | |
7878cba9 MP |
68 | memset(bip, 0, sizeof(*bip)); |
69 | ||
9f060e22 | 70 | if (nr_vecs > inline_vecs) { |
ed996a52 CH |
71 | unsigned long idx = 0; |
72 | ||
9f060e22 | 73 | bip->bip_vec = bvec_alloc(gfp_mask, nr_vecs, &idx, |
8aa6ba2f | 74 | &bs->bvec_integrity_pool); |
9f060e22 KO |
75 | if (!bip->bip_vec) |
76 | goto err; | |
cbcd1054 | 77 | bip->bip_max_vcnt = bvec_nr_vecs(idx); |
ed996a52 | 78 | bip->bip_slab = idx; |
9f060e22 KO |
79 | } else { |
80 | bip->bip_vec = bip->bip_inline_vecs; | |
cbcd1054 | 81 | bip->bip_max_vcnt = inline_vecs; |
9f060e22 KO |
82 | } |
83 | ||
7ba1ba12 MP |
84 | bip->bip_bio = bio; |
85 | bio->bi_integrity = bip; | |
1eff9d32 | 86 | bio->bi_opf |= REQ_INTEGRITY; |
7ba1ba12 MP |
87 | |
88 | return bip; | |
9f060e22 | 89 | err: |
e878ae19 | 90 | __bio_integrity_free(bs, bip); |
06c1e390 | 91 | return ERR_PTR(-ENOMEM); |
7ba1ba12 | 92 | } |
7ba1ba12 MP |
93 | EXPORT_SYMBOL(bio_integrity_alloc); |
94 | ||
95 | /** | |
96 | * bio_integrity_free - Free bio integrity payload | |
97 | * @bio: bio containing bip to be freed | |
7ba1ba12 MP |
98 | * |
99 | * Description: Used to free the integrity portion of a bio. Usually | |
100 | * called from bio_free(). | |
101 | */ | |
478cf75b | 102 | void bio_integrity_free(struct bio *bio) |
7ba1ba12 | 103 | { |
180b2f95 | 104 | struct bio_integrity_payload *bip = bio_integrity(bio); |
1e2a410f KO |
105 | struct bio_set *bs = bio->bi_pool; |
106 | ||
b1f01388 | 107 | if (bip->bip_flags & BIP_BLOCK_INTEGRITY) |
5f9378fa MP |
108 | kfree(page_address(bip->bip_vec->bv_page) + |
109 | bip->bip_vec->bv_offset); | |
7ba1ba12 | 110 | |
e878ae19 | 111 | __bio_integrity_free(bs, bip); |
7ba1ba12 | 112 | bio->bi_integrity = NULL; |
7c20f116 | 113 | bio->bi_opf &= ~REQ_INTEGRITY; |
7ba1ba12 | 114 | } |
7ba1ba12 MP |
115 | |
116 | /** | |
117 | * bio_integrity_add_page - Attach integrity metadata | |
118 | * @bio: bio to update | |
119 | * @page: page containing integrity metadata | |
120 | * @len: number of bytes of integrity metadata in page | |
121 | * @offset: start offset within page | |
122 | * | |
123 | * Description: Attach a page containing integrity metadata to bio. | |
124 | */ | |
125 | int bio_integrity_add_page(struct bio *bio, struct page *page, | |
126 | unsigned int len, unsigned int offset) | |
127 | { | |
180b2f95 | 128 | struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12 MP |
129 | struct bio_vec *iv; |
130 | ||
cbcd1054 | 131 | if (bip->bip_vcnt >= bip->bip_max_vcnt) { |
7ba1ba12 MP |
132 | printk(KERN_ERR "%s: bip_vec full\n", __func__); |
133 | return 0; | |
134 | } | |
135 | ||
d57a5f7c | 136 | iv = bip->bip_vec + bip->bip_vcnt; |
7ba1ba12 | 137 | |
87a816df | 138 | if (bip->bip_vcnt && |
74d46992 | 139 | bvec_gap_to_prev(bio->bi_disk->queue, |
87a816df SG |
140 | &bip->bip_vec[bip->bip_vcnt - 1], offset)) |
141 | return 0; | |
142 | ||
7ba1ba12 MP |
143 | iv->bv_page = page; |
144 | iv->bv_len = len; | |
145 | iv->bv_offset = offset; | |
146 | bip->bip_vcnt++; | |
147 | ||
148 | return len; | |
149 | } | |
150 | EXPORT_SYMBOL(bio_integrity_add_page); | |
151 | ||
7ba1ba12 | 152 | /** |
18593088 | 153 | * bio_integrity_process - Process integrity metadata for a bio |
bf36f9cf | 154 | * @bio: bio to generate/verify integrity metadata for |
63573e35 | 155 | * @proc_iter: iterator to process |
18593088 | 156 | * @proc_fn: Pointer to the relevant processing function |
7ba1ba12 | 157 | */ |
4e4cbee9 | 158 | static blk_status_t bio_integrity_process(struct bio *bio, |
63573e35 | 159 | struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) |
7ba1ba12 | 160 | { |
74d46992 | 161 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
18593088 | 162 | struct blk_integrity_iter iter; |
594416a7 DW |
163 | struct bvec_iter bviter; |
164 | struct bio_vec bv; | |
5f9378fa | 165 | struct bio_integrity_payload *bip = bio_integrity(bio); |
4e4cbee9 | 166 | blk_status_t ret = BLK_STS_OK; |
5f9378fa MP |
167 | void *prot_buf = page_address(bip->bip_vec->bv_page) + |
168 | bip->bip_vec->bv_offset; | |
7ba1ba12 | 169 | |
74d46992 | 170 | iter.disk_name = bio->bi_disk->disk_name; |
a48f041d | 171 | iter.interval = 1 << bi->interval_exp; |
63573e35 | 172 | iter.seed = proc_iter->bi_sector; |
18593088 | 173 | iter.prot_buf = prot_buf; |
7ba1ba12 | 174 | |
63573e35 | 175 | __bio_for_each_segment(bv, bio, bviter, *proc_iter) { |
594416a7 | 176 | void *kaddr = kmap_atomic(bv.bv_page); |
7ba1ba12 | 177 | |
594416a7 DW |
178 | iter.data_buf = kaddr + bv.bv_offset; |
179 | iter.data_size = bv.bv_len; | |
18593088 MP |
180 | |
181 | ret = proc_fn(&iter); | |
182 | if (ret) { | |
183 | kunmap_atomic(kaddr); | |
184 | return ret; | |
185 | } | |
7ba1ba12 | 186 | |
e8e3c3d6 | 187 | kunmap_atomic(kaddr); |
7ba1ba12 | 188 | } |
bf36f9cf GZ |
189 | return ret; |
190 | } | |
191 | ||
7ba1ba12 MP |
192 | /** |
193 | * bio_integrity_prep - Prepare bio for integrity I/O | |
194 | * @bio: bio to prepare | |
195 | * | |
e23947bd DM |
196 | * Description: Checks if the bio already has an integrity payload attached. |
197 | * If it does, the payload has been generated by another kernel subsystem, | |
198 | * and we just pass it through. Otherwise allocates integrity payload. | |
199 | * The bio must have data direction, target device and start sector set priot | |
200 | * to calling. In the WRITE case, integrity metadata will be generated using | |
201 | * the block device's integrity function. In the READ case, the buffer | |
7ba1ba12 MP |
202 | * will be prepared for DMA and a suitable end_io handler set up. |
203 | */ | |
e23947bd | 204 | bool bio_integrity_prep(struct bio *bio) |
7ba1ba12 MP |
205 | { |
206 | struct bio_integrity_payload *bip; | |
74d46992 CH |
207 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
208 | struct request_queue *q = bio->bi_disk->queue; | |
7ba1ba12 MP |
209 | void *buf; |
210 | unsigned long start, end; | |
211 | unsigned int len, nr_pages; | |
212 | unsigned int bytes, offset, i; | |
3be91c4a | 213 | unsigned int intervals; |
e23947bd | 214 | blk_status_t status; |
7ba1ba12 | 215 | |
9346beb9 CH |
216 | if (!bi) |
217 | return true; | |
218 | ||
e23947bd DM |
219 | if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE) |
220 | return true; | |
221 | ||
222 | if (!bio_sectors(bio)) | |
223 | return true; | |
7ba1ba12 | 224 | |
e23947bd DM |
225 | /* Already protected? */ |
226 | if (bio_integrity(bio)) | |
227 | return true; | |
228 | ||
e23947bd DM |
229 | if (bio_data_dir(bio) == READ) { |
230 | if (!bi->profile->verify_fn || | |
231 | !(bi->flags & BLK_INTEGRITY_VERIFY)) | |
232 | return true; | |
233 | } else { | |
234 | if (!bi->profile->generate_fn || | |
235 | !(bi->flags & BLK_INTEGRITY_GENERATE)) | |
236 | return true; | |
237 | } | |
3be91c4a | 238 | intervals = bio_integrity_intervals(bi, bio_sectors(bio)); |
7ba1ba12 MP |
239 | |
240 | /* Allocate kernel buffer for protection data */ | |
3be91c4a | 241 | len = intervals * bi->tuple_size; |
72f46503 | 242 | buf = kmalloc(len, GFP_NOIO | q->bounce_gfp); |
e23947bd | 243 | status = BLK_STS_RESOURCE; |
7ba1ba12 MP |
244 | if (unlikely(buf == NULL)) { |
245 | printk(KERN_ERR "could not allocate integrity buffer\n"); | |
e23947bd | 246 | goto err_end_io; |
7ba1ba12 MP |
247 | } |
248 | ||
249 | end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
250 | start = ((unsigned long) buf) >> PAGE_SHIFT; | |
251 | nr_pages = end - start; | |
252 | ||
253 | /* Allocate bio integrity payload and integrity vectors */ | |
254 | bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages); | |
7b6c0f80 | 255 | if (IS_ERR(bip)) { |
7ba1ba12 MP |
256 | printk(KERN_ERR "could not allocate data integrity bioset\n"); |
257 | kfree(buf); | |
e23947bd DM |
258 | status = BLK_STS_RESOURCE; |
259 | goto err_end_io; | |
7ba1ba12 MP |
260 | } |
261 | ||
b1f01388 | 262 | bip->bip_flags |= BIP_BLOCK_INTEGRITY; |
d57a5f7c | 263 | bip->bip_iter.bi_size = len; |
18593088 | 264 | bip_set_seed(bip, bio->bi_iter.bi_sector); |
7ba1ba12 | 265 | |
aae7df50 MP |
266 | if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) |
267 | bip->bip_flags |= BIP_IP_CHECKSUM; | |
268 | ||
7ba1ba12 MP |
269 | /* Map it */ |
270 | offset = offset_in_page(buf); | |
271 | for (i = 0 ; i < nr_pages ; i++) { | |
272 | int ret; | |
273 | bytes = PAGE_SIZE - offset; | |
274 | ||
275 | if (len <= 0) | |
276 | break; | |
277 | ||
278 | if (bytes > len) | |
279 | bytes = len; | |
280 | ||
281 | ret = bio_integrity_add_page(bio, virt_to_page(buf), | |
282 | bytes, offset); | |
283 | ||
e7bf90e5 WW |
284 | if (ret == 0) { |
285 | printk(KERN_ERR "could not attach integrity payload\n"); | |
e7bf90e5 WW |
286 | status = BLK_STS_RESOURCE; |
287 | goto err_end_io; | |
288 | } | |
7ba1ba12 MP |
289 | |
290 | if (ret < bytes) | |
291 | break; | |
292 | ||
293 | buf += bytes; | |
294 | len -= bytes; | |
295 | offset = 0; | |
296 | } | |
297 | ||
7ba1ba12 | 298 | /* Auto-generate integrity metadata if this is a write */ |
63573e35 DM |
299 | if (bio_data_dir(bio) == WRITE) { |
300 | bio_integrity_process(bio, &bio->bi_iter, | |
301 | bi->profile->generate_fn); | |
7759eb23 ML |
302 | } else { |
303 | bip->bio_iter = bio->bi_iter; | |
63573e35 | 304 | } |
e23947bd DM |
305 | return true; |
306 | ||
307 | err_end_io: | |
308 | bio->bi_status = status; | |
309 | bio_endio(bio); | |
310 | return false; | |
7ba1ba12 | 311 | |
7ba1ba12 MP |
312 | } |
313 | EXPORT_SYMBOL(bio_integrity_prep); | |
314 | ||
7ba1ba12 MP |
315 | /** |
316 | * bio_integrity_verify_fn - Integrity I/O completion worker | |
317 | * @work: Work struct stored in bio to be verified | |
318 | * | |
319 | * Description: This workqueue function is called to complete a READ | |
320 | * request. The function verifies the transferred integrity metadata | |
321 | * and then calls the original bio end_io function. | |
322 | */ | |
323 | static void bio_integrity_verify_fn(struct work_struct *work) | |
324 | { | |
b984679e | 325 | struct bio_integrity_payload *bip = |
7ba1ba12 MP |
326 | container_of(work, struct bio_integrity_payload, bip_work); |
327 | struct bio *bio = bip->bip_bio; | |
74d46992 | 328 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
63573e35 DM |
329 | |
330 | /* | |
331 | * At the moment verify is called bio's iterator was advanced | |
332 | * during split and completion, we need to rewind iterator to | |
333 | * it's original position. | |
334 | */ | |
7759eb23 ML |
335 | bio->bi_status = bio_integrity_process(bio, &bip->bio_iter, |
336 | bi->profile->verify_fn); | |
7c20f116 | 337 | bio_integrity_free(bio); |
4246a0b6 | 338 | bio_endio(bio); |
7ba1ba12 MP |
339 | } |
340 | ||
341 | /** | |
7c20f116 | 342 | * __bio_integrity_endio - Integrity I/O completion function |
7ba1ba12 | 343 | * @bio: Protected bio |
7ba1ba12 MP |
344 | * |
345 | * Description: Completion for integrity I/O | |
346 | * | |
347 | * Normally I/O completion is done in interrupt context. However, | |
348 | * verifying I/O integrity is a time-consuming task which must be run | |
349 | * in process context. This function postpones completion | |
350 | * accordingly. | |
351 | */ | |
7c20f116 | 352 | bool __bio_integrity_endio(struct bio *bio) |
7ba1ba12 | 353 | { |
97e05463 | 354 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
f86e28c4 | 355 | struct bio_integrity_payload *bip = bio_integrity(bio); |
c775d209 MB |
356 | |
357 | if (bio_op(bio) == REQ_OP_READ && !bio->bi_status && | |
f86e28c4 | 358 | (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) { |
7c20f116 CH |
359 | INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); |
360 | queue_work(kintegrityd_wq, &bip->bip_work); | |
361 | return false; | |
7b24fc4d MP |
362 | } |
363 | ||
7c20f116 CH |
364 | bio_integrity_free(bio); |
365 | return true; | |
7ba1ba12 | 366 | } |
7ba1ba12 | 367 | |
7ba1ba12 MP |
368 | /** |
369 | * bio_integrity_advance - Advance integrity vector | |
370 | * @bio: bio whose integrity vector to update | |
371 | * @bytes_done: number of data bytes that have been completed | |
372 | * | |
373 | * Description: This function calculates how many integrity bytes the | |
374 | * number of completed data bytes correspond to and advances the | |
375 | * integrity vector accordingly. | |
376 | */ | |
377 | void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) | |
378 | { | |
180b2f95 | 379 | struct bio_integrity_payload *bip = bio_integrity(bio); |
74d46992 | 380 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
d57a5f7c | 381 | unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); |
7ba1ba12 | 382 | |
309a62fa | 383 | bip->bip_iter.bi_sector += bytes_done >> 9; |
d57a5f7c | 384 | bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); |
7ba1ba12 | 385 | } |
7ba1ba12 MP |
386 | |
387 | /** | |
388 | * bio_integrity_trim - Trim integrity vector | |
389 | * @bio: bio whose integrity vector to update | |
7ba1ba12 MP |
390 | * |
391 | * Description: Used to trim the integrity vector in a cloned bio. | |
7ba1ba12 | 392 | */ |
fbd08e76 | 393 | void bio_integrity_trim(struct bio *bio) |
7ba1ba12 | 394 | { |
180b2f95 | 395 | struct bio_integrity_payload *bip = bio_integrity(bio); |
74d46992 | 396 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
7ba1ba12 | 397 | |
fbd08e76 | 398 | bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); |
7ba1ba12 MP |
399 | } |
400 | EXPORT_SYMBOL(bio_integrity_trim); | |
401 | ||
7ba1ba12 MP |
402 | /** |
403 | * bio_integrity_clone - Callback for cloning bios with integrity metadata | |
404 | * @bio: New bio | |
405 | * @bio_src: Original bio | |
87092698 | 406 | * @gfp_mask: Memory allocation mask |
7ba1ba12 MP |
407 | * |
408 | * Description: Called to allocate a bip when cloning a bio | |
409 | */ | |
7878cba9 | 410 | int bio_integrity_clone(struct bio *bio, struct bio *bio_src, |
1e2a410f | 411 | gfp_t gfp_mask) |
7ba1ba12 | 412 | { |
180b2f95 | 413 | struct bio_integrity_payload *bip_src = bio_integrity(bio_src); |
7ba1ba12 MP |
414 | struct bio_integrity_payload *bip; |
415 | ||
416 | BUG_ON(bip_src == NULL); | |
417 | ||
1e2a410f | 418 | bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt); |
7b6c0f80 DC |
419 | if (IS_ERR(bip)) |
420 | return PTR_ERR(bip); | |
7ba1ba12 MP |
421 | |
422 | memcpy(bip->bip_vec, bip_src->bip_vec, | |
423 | bip_src->bip_vcnt * sizeof(struct bio_vec)); | |
424 | ||
7ba1ba12 | 425 | bip->bip_vcnt = bip_src->bip_vcnt; |
d57a5f7c | 426 | bip->bip_iter = bip_src->bip_iter; |
7ba1ba12 MP |
427 | |
428 | return 0; | |
429 | } | |
430 | EXPORT_SYMBOL(bio_integrity_clone); | |
431 | ||
7878cba9 | 432 | int bioset_integrity_create(struct bio_set *bs, int pool_size) |
7ba1ba12 | 433 | { |
8aa6ba2f | 434 | if (mempool_initialized(&bs->bio_integrity_pool)) |
a91a2785 MP |
435 | return 0; |
436 | ||
8aa6ba2f KO |
437 | if (mempool_init_slab_pool(&bs->bio_integrity_pool, |
438 | pool_size, bip_slab)) | |
9f060e22 | 439 | return -1; |
7ba1ba12 | 440 | |
8aa6ba2f KO |
441 | if (biovec_init_pool(&bs->bvec_integrity_pool, pool_size)) { |
442 | mempool_exit(&bs->bio_integrity_pool); | |
7878cba9 | 443 | return -1; |
bc5c8f07 | 444 | } |
7878cba9 MP |
445 | |
446 | return 0; | |
447 | } | |
448 | EXPORT_SYMBOL(bioset_integrity_create); | |
449 | ||
450 | void bioset_integrity_free(struct bio_set *bs) | |
451 | { | |
8aa6ba2f KO |
452 | mempool_exit(&bs->bio_integrity_pool); |
453 | mempool_exit(&bs->bvec_integrity_pool); | |
7878cba9 | 454 | } |
7878cba9 MP |
455 | |
456 | void __init bio_integrity_init(void) | |
457 | { | |
a6e8dc46 TH |
458 | /* |
459 | * kintegrityd won't block much but may burn a lot of CPU cycles. | |
460 | * Make it highpri CPU intensive wq with max concurrency of 1. | |
461 | */ | |
462 | kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | | |
463 | WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); | |
6d2a78e7 MP |
464 | if (!kintegrityd_wq) |
465 | panic("Failed to create kintegrityd\n"); | |
7ba1ba12 | 466 | |
9f060e22 KO |
467 | bip_slab = kmem_cache_create("bio_integrity_payload", |
468 | sizeof(struct bio_integrity_payload) + | |
469 | sizeof(struct bio_vec) * BIP_INLINE_VECS, | |
470 | 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); | |
7ba1ba12 | 471 | } |