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 | 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) |
5f9378fa MP |
107 | kfree(page_address(bip->bip_vec->bv_page) + |
108 | bip->bip_vec->bv_offset); | |
7ba1ba12 | 109 | |
0b8eb629 | 110 | __bio_integrity_free(bs, bip); |
7ba1ba12 | 111 | bio->bi_integrity = NULL; |
7c20f116 | 112 | bio->bi_opf &= ~REQ_INTEGRITY; |
7ba1ba12 | 113 | } |
7ba1ba12 MP |
114 | |
115 | /** | |
116 | * bio_integrity_add_page - Attach integrity metadata | |
117 | * @bio: bio to update | |
118 | * @page: page containing integrity metadata | |
119 | * @len: number of bytes of integrity metadata in page | |
120 | * @offset: start offset within page | |
121 | * | |
122 | * Description: Attach a page containing integrity metadata to bio. | |
123 | */ | |
124 | int bio_integrity_add_page(struct bio *bio, struct page *page, | |
125 | unsigned int len, unsigned int offset) | |
126 | { | |
180b2f95 | 127 | struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12 MP |
128 | struct bio_vec *iv; |
129 | ||
cbcd1054 | 130 | if (bip->bip_vcnt >= bip->bip_max_vcnt) { |
7ba1ba12 MP |
131 | printk(KERN_ERR "%s: bip_vec full\n", __func__); |
132 | return 0; | |
133 | } | |
134 | ||
d57a5f7c | 135 | iv = bip->bip_vec + bip->bip_vcnt; |
7ba1ba12 | 136 | |
87a816df | 137 | if (bip->bip_vcnt && |
309dca30 | 138 | bvec_gap_to_prev(bio->bi_bdev->bd_disk->queue, |
87a816df SG |
139 | &bip->bip_vec[bip->bip_vcnt - 1], offset)) |
140 | return 0; | |
141 | ||
7ba1ba12 MP |
142 | iv->bv_page = page; |
143 | iv->bv_len = len; | |
144 | iv->bv_offset = offset; | |
145 | bip->bip_vcnt++; | |
146 | ||
147 | return len; | |
148 | } | |
149 | EXPORT_SYMBOL(bio_integrity_add_page); | |
150 | ||
7ba1ba12 | 151 | /** |
18593088 | 152 | * bio_integrity_process - Process integrity metadata for a bio |
bf36f9cf | 153 | * @bio: bio to generate/verify integrity metadata for |
63573e35 | 154 | * @proc_iter: iterator to process |
18593088 | 155 | * @proc_fn: Pointer to the relevant processing function |
7ba1ba12 | 156 | */ |
4e4cbee9 | 157 | static blk_status_t bio_integrity_process(struct bio *bio, |
63573e35 | 158 | struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) |
7ba1ba12 | 159 | { |
309dca30 | 160 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
18593088 | 161 | struct blk_integrity_iter iter; |
594416a7 DW |
162 | struct bvec_iter bviter; |
163 | struct bio_vec bv; | |
5f9378fa | 164 | struct bio_integrity_payload *bip = bio_integrity(bio); |
4e4cbee9 | 165 | blk_status_t ret = BLK_STS_OK; |
5f9378fa MP |
166 | void *prot_buf = page_address(bip->bip_vec->bv_page) + |
167 | bip->bip_vec->bv_offset; | |
7ba1ba12 | 168 | |
309dca30 | 169 | iter.disk_name = bio->bi_bdev->bd_disk->disk_name; |
a48f041d | 170 | iter.interval = 1 << bi->interval_exp; |
63573e35 | 171 | iter.seed = proc_iter->bi_sector; |
18593088 | 172 | iter.prot_buf = prot_buf; |
7ba1ba12 | 173 | |
63573e35 | 174 | __bio_for_each_segment(bv, bio, bviter, *proc_iter) { |
594416a7 | 175 | void *kaddr = kmap_atomic(bv.bv_page); |
7ba1ba12 | 176 | |
594416a7 DW |
177 | iter.data_buf = kaddr + bv.bv_offset; |
178 | iter.data_size = bv.bv_len; | |
18593088 MP |
179 | |
180 | ret = proc_fn(&iter); | |
181 | if (ret) { | |
182 | kunmap_atomic(kaddr); | |
183 | return ret; | |
184 | } | |
7ba1ba12 | 185 | |
e8e3c3d6 | 186 | kunmap_atomic(kaddr); |
7ba1ba12 | 187 | } |
bf36f9cf GZ |
188 | return ret; |
189 | } | |
190 | ||
7ba1ba12 MP |
191 | /** |
192 | * bio_integrity_prep - Prepare bio for integrity I/O | |
193 | * @bio: bio to prepare | |
194 | * | |
e23947bd DM |
195 | * Description: Checks if the bio already has an integrity payload attached. |
196 | * If it does, the payload has been generated by another kernel subsystem, | |
197 | * and we just pass it through. Otherwise allocates integrity payload. | |
198 | * The bio must have data direction, target device and start sector set priot | |
199 | * to calling. In the WRITE case, integrity metadata will be generated using | |
200 | * the block device's integrity function. In the READ case, the buffer | |
7ba1ba12 MP |
201 | * will be prepared for DMA and a suitable end_io handler set up. |
202 | */ | |
e23947bd | 203 | bool bio_integrity_prep(struct bio *bio) |
7ba1ba12 MP |
204 | { |
205 | struct bio_integrity_payload *bip; | |
309dca30 | 206 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
7ba1ba12 MP |
207 | void *buf; |
208 | unsigned long start, end; | |
209 | unsigned int len, nr_pages; | |
210 | unsigned int bytes, offset, i; | |
3be91c4a | 211 | unsigned int intervals; |
e23947bd | 212 | blk_status_t status; |
7ba1ba12 | 213 | |
9346beb9 CH |
214 | if (!bi) |
215 | return true; | |
216 | ||
e23947bd DM |
217 | if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE) |
218 | return true; | |
219 | ||
220 | if (!bio_sectors(bio)) | |
221 | return true; | |
7ba1ba12 | 222 | |
e23947bd DM |
223 | /* Already protected? */ |
224 | if (bio_integrity(bio)) | |
225 | return true; | |
226 | ||
e23947bd DM |
227 | if (bio_data_dir(bio) == READ) { |
228 | if (!bi->profile->verify_fn || | |
229 | !(bi->flags & BLK_INTEGRITY_VERIFY)) | |
230 | return true; | |
231 | } else { | |
232 | if (!bi->profile->generate_fn || | |
233 | !(bi->flags & BLK_INTEGRITY_GENERATE)) | |
234 | return true; | |
235 | } | |
3be91c4a | 236 | intervals = bio_integrity_intervals(bi, bio_sectors(bio)); |
7ba1ba12 MP |
237 | |
238 | /* Allocate kernel buffer for protection data */ | |
3be91c4a | 239 | len = intervals * bi->tuple_size; |
ce288e05 | 240 | buf = kmalloc(len, GFP_NOIO); |
e23947bd | 241 | status = BLK_STS_RESOURCE; |
7ba1ba12 MP |
242 | if (unlikely(buf == NULL)) { |
243 | printk(KERN_ERR "could not allocate integrity buffer\n"); | |
e23947bd | 244 | goto err_end_io; |
7ba1ba12 MP |
245 | } |
246 | ||
247 | end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
248 | start = ((unsigned long) buf) >> PAGE_SHIFT; | |
249 | nr_pages = end - start; | |
250 | ||
251 | /* Allocate bio integrity payload and integrity vectors */ | |
252 | bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages); | |
7b6c0f80 | 253 | if (IS_ERR(bip)) { |
7ba1ba12 MP |
254 | printk(KERN_ERR "could not allocate data integrity bioset\n"); |
255 | kfree(buf); | |
e23947bd DM |
256 | status = BLK_STS_RESOURCE; |
257 | goto err_end_io; | |
7ba1ba12 MP |
258 | } |
259 | ||
b1f01388 | 260 | bip->bip_flags |= BIP_BLOCK_INTEGRITY; |
d57a5f7c | 261 | bip->bip_iter.bi_size = len; |
18593088 | 262 | bip_set_seed(bip, bio->bi_iter.bi_sector); |
7ba1ba12 | 263 | |
aae7df50 MP |
264 | if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) |
265 | bip->bip_flags |= BIP_IP_CHECKSUM; | |
266 | ||
7ba1ba12 MP |
267 | /* Map it */ |
268 | offset = offset_in_page(buf); | |
269 | for (i = 0 ; i < nr_pages ; i++) { | |
270 | int ret; | |
271 | bytes = PAGE_SIZE - offset; | |
272 | ||
273 | if (len <= 0) | |
274 | break; | |
275 | ||
276 | if (bytes > len) | |
277 | bytes = len; | |
278 | ||
279 | ret = bio_integrity_add_page(bio, virt_to_page(buf), | |
280 | bytes, offset); | |
281 | ||
e7bf90e5 WW |
282 | if (ret == 0) { |
283 | printk(KERN_ERR "could not attach integrity payload\n"); | |
e7bf90e5 WW |
284 | status = BLK_STS_RESOURCE; |
285 | goto err_end_io; | |
286 | } | |
7ba1ba12 MP |
287 | |
288 | if (ret < bytes) | |
289 | break; | |
290 | ||
291 | buf += bytes; | |
292 | len -= bytes; | |
293 | offset = 0; | |
294 | } | |
295 | ||
7ba1ba12 | 296 | /* Auto-generate integrity metadata if this is a write */ |
63573e35 DM |
297 | if (bio_data_dir(bio) == WRITE) { |
298 | bio_integrity_process(bio, &bio->bi_iter, | |
299 | bi->profile->generate_fn); | |
7759eb23 ML |
300 | } else { |
301 | bip->bio_iter = bio->bi_iter; | |
63573e35 | 302 | } |
e23947bd DM |
303 | return true; |
304 | ||
305 | err_end_io: | |
306 | bio->bi_status = status; | |
307 | bio_endio(bio); | |
308 | return false; | |
7ba1ba12 | 309 | |
7ba1ba12 MP |
310 | } |
311 | EXPORT_SYMBOL(bio_integrity_prep); | |
312 | ||
7ba1ba12 MP |
313 | /** |
314 | * bio_integrity_verify_fn - Integrity I/O completion worker | |
315 | * @work: Work struct stored in bio to be verified | |
316 | * | |
317 | * Description: This workqueue function is called to complete a READ | |
318 | * request. The function verifies the transferred integrity metadata | |
319 | * and then calls the original bio end_io function. | |
320 | */ | |
321 | static void bio_integrity_verify_fn(struct work_struct *work) | |
322 | { | |
b984679e | 323 | struct bio_integrity_payload *bip = |
7ba1ba12 MP |
324 | container_of(work, struct bio_integrity_payload, bip_work); |
325 | struct bio *bio = bip->bip_bio; | |
309dca30 | 326 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
63573e35 DM |
327 | |
328 | /* | |
329 | * At the moment verify is called bio's iterator was advanced | |
330 | * during split and completion, we need to rewind iterator to | |
331 | * it's original position. | |
332 | */ | |
7759eb23 ML |
333 | bio->bi_status = bio_integrity_process(bio, &bip->bio_iter, |
334 | bi->profile->verify_fn); | |
7c20f116 | 335 | bio_integrity_free(bio); |
4246a0b6 | 336 | bio_endio(bio); |
7ba1ba12 MP |
337 | } |
338 | ||
339 | /** | |
7c20f116 | 340 | * __bio_integrity_endio - Integrity I/O completion function |
7ba1ba12 | 341 | * @bio: Protected bio |
7ba1ba12 MP |
342 | * |
343 | * Description: Completion for integrity I/O | |
344 | * | |
345 | * Normally I/O completion is done in interrupt context. However, | |
346 | * verifying I/O integrity is a time-consuming task which must be run | |
347 | * in process context. This function postpones completion | |
348 | * accordingly. | |
349 | */ | |
7c20f116 | 350 | bool __bio_integrity_endio(struct bio *bio) |
7ba1ba12 | 351 | { |
309dca30 | 352 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
f86e28c4 | 353 | struct bio_integrity_payload *bip = bio_integrity(bio); |
c775d209 MB |
354 | |
355 | if (bio_op(bio) == REQ_OP_READ && !bio->bi_status && | |
f86e28c4 | 356 | (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) { |
7c20f116 CH |
357 | INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); |
358 | queue_work(kintegrityd_wq, &bip->bip_work); | |
359 | return false; | |
7b24fc4d MP |
360 | } |
361 | ||
7c20f116 CH |
362 | bio_integrity_free(bio); |
363 | return true; | |
7ba1ba12 | 364 | } |
7ba1ba12 | 365 | |
7ba1ba12 MP |
366 | /** |
367 | * bio_integrity_advance - Advance integrity vector | |
368 | * @bio: bio whose integrity vector to update | |
369 | * @bytes_done: number of data bytes that have been completed | |
370 | * | |
371 | * Description: This function calculates how many integrity bytes the | |
372 | * number of completed data bytes correspond to and advances the | |
373 | * integrity vector accordingly. | |
374 | */ | |
375 | void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) | |
376 | { | |
180b2f95 | 377 | struct bio_integrity_payload *bip = bio_integrity(bio); |
309dca30 | 378 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
d57a5f7c | 379 | unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); |
7ba1ba12 | 380 | |
309a62fa | 381 | bip->bip_iter.bi_sector += bytes_done >> 9; |
d57a5f7c | 382 | bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); |
7ba1ba12 | 383 | } |
7ba1ba12 MP |
384 | |
385 | /** | |
386 | * bio_integrity_trim - Trim integrity vector | |
387 | * @bio: bio whose integrity vector to update | |
7ba1ba12 MP |
388 | * |
389 | * Description: Used to trim the integrity vector in a cloned bio. | |
7ba1ba12 | 390 | */ |
fbd08e76 | 391 | void bio_integrity_trim(struct bio *bio) |
7ba1ba12 | 392 | { |
180b2f95 | 393 | struct bio_integrity_payload *bip = bio_integrity(bio); |
309dca30 | 394 | struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); |
7ba1ba12 | 395 | |
fbd08e76 | 396 | bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); |
7ba1ba12 MP |
397 | } |
398 | EXPORT_SYMBOL(bio_integrity_trim); | |
399 | ||
7ba1ba12 MP |
400 | /** |
401 | * bio_integrity_clone - Callback for cloning bios with integrity metadata | |
402 | * @bio: New bio | |
403 | * @bio_src: Original bio | |
87092698 | 404 | * @gfp_mask: Memory allocation mask |
7ba1ba12 MP |
405 | * |
406 | * Description: Called to allocate a bip when cloning a bio | |
407 | */ | |
7878cba9 | 408 | int bio_integrity_clone(struct bio *bio, struct bio *bio_src, |
1e2a410f | 409 | gfp_t gfp_mask) |
7ba1ba12 | 410 | { |
180b2f95 | 411 | struct bio_integrity_payload *bip_src = bio_integrity(bio_src); |
7ba1ba12 MP |
412 | struct bio_integrity_payload *bip; |
413 | ||
414 | BUG_ON(bip_src == NULL); | |
415 | ||
1e2a410f | 416 | bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt); |
7b6c0f80 DC |
417 | if (IS_ERR(bip)) |
418 | return PTR_ERR(bip); | |
7ba1ba12 MP |
419 | |
420 | memcpy(bip->bip_vec, bip_src->bip_vec, | |
421 | bip_src->bip_vcnt * sizeof(struct bio_vec)); | |
422 | ||
7ba1ba12 | 423 | bip->bip_vcnt = bip_src->bip_vcnt; |
d57a5f7c | 424 | bip->bip_iter = bip_src->bip_iter; |
7ba1ba12 MP |
425 | |
426 | return 0; | |
427 | } | |
428 | EXPORT_SYMBOL(bio_integrity_clone); | |
429 | ||
7878cba9 | 430 | int bioset_integrity_create(struct bio_set *bs, int pool_size) |
7ba1ba12 | 431 | { |
8aa6ba2f | 432 | if (mempool_initialized(&bs->bio_integrity_pool)) |
a91a2785 MP |
433 | return 0; |
434 | ||
8aa6ba2f KO |
435 | if (mempool_init_slab_pool(&bs->bio_integrity_pool, |
436 | pool_size, bip_slab)) | |
9f060e22 | 437 | return -1; |
7ba1ba12 | 438 | |
8aa6ba2f KO |
439 | if (biovec_init_pool(&bs->bvec_integrity_pool, pool_size)) { |
440 | mempool_exit(&bs->bio_integrity_pool); | |
7878cba9 | 441 | return -1; |
bc5c8f07 | 442 | } |
7878cba9 MP |
443 | |
444 | return 0; | |
445 | } | |
446 | EXPORT_SYMBOL(bioset_integrity_create); | |
447 | ||
448 | void bioset_integrity_free(struct bio_set *bs) | |
449 | { | |
8aa6ba2f KO |
450 | mempool_exit(&bs->bio_integrity_pool); |
451 | mempool_exit(&bs->bvec_integrity_pool); | |
7878cba9 | 452 | } |
7878cba9 MP |
453 | |
454 | void __init bio_integrity_init(void) | |
455 | { | |
a6e8dc46 TH |
456 | /* |
457 | * kintegrityd won't block much but may burn a lot of CPU cycles. | |
458 | * Make it highpri CPU intensive wq with max concurrency of 1. | |
459 | */ | |
460 | kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | | |
461 | WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); | |
6d2a78e7 MP |
462 | if (!kintegrityd_wq) |
463 | panic("Failed to create kintegrityd\n"); | |
7ba1ba12 | 464 | |
9f060e22 KO |
465 | bip_slab = kmem_cache_create("bio_integrity_payload", |
466 | sizeof(struct bio_integrity_payload) + | |
dc0b8a57 | 467 | sizeof(struct bio_vec) * BIO_INLINE_VECS, |
9f060e22 | 468 | 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); |
7ba1ba12 | 469 | } |