Commit | Line | Data |
---|---|---|
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 | ||
3197d48a WY |
27 | static void __bio_integrity_free(struct bio_set *bs, |
28 | struct bio_integrity_payload *bip) | |
0b8eb629 CX |
29 | { |
30 | if (bs && mempool_initialized(&bs->bio_integrity_pool)) { | |
31 | if (bip->bip_vec) | |
32 | bvec_free(&bs->bvec_integrity_pool, bip->bip_vec, | |
33 | bip->bip_slab); | |
34 | mempool_free(bip, &bs->bio_integrity_pool); | |
35 | } else { | |
36 | kfree(bip); | |
37 | } | |
38 | } | |
39 | ||
7ba1ba12 | 40 | /** |
1e2a410f | 41 | * bio_integrity_alloc - Allocate integrity payload and attach it to bio |
7ba1ba12 MP |
42 | * @bio: bio to attach integrity metadata to |
43 | * @gfp_mask: Memory allocation mask | |
44 | * @nr_vecs: Number of integrity metadata scatter-gather elements | |
7ba1ba12 MP |
45 | * |
46 | * Description: This function prepares a bio for attaching integrity | |
47 | * metadata. nr_vecs specifies the maximum number of pages containing | |
48 | * integrity metadata that can be attached. | |
49 | */ | |
1e2a410f KO |
50 | struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, |
51 | gfp_t gfp_mask, | |
52 | unsigned int nr_vecs) | |
7ba1ba12 MP |
53 | { |
54 | struct bio_integrity_payload *bip; | |
1e2a410f | 55 | struct bio_set *bs = bio->bi_pool; |
9f060e22 KO |
56 | unsigned inline_vecs; |
57 | ||
d145dc23 ST |
58 | if (WARN_ON_ONCE(bio_has_crypt_ctx(bio))) |
59 | return ERR_PTR(-EOPNOTSUPP); | |
60 | ||
8aa6ba2f | 61 | if (!bs || !mempool_initialized(&bs->bio_integrity_pool)) { |
7a102d90 | 62 | bip = kmalloc(struct_size(bip, bip_inline_vecs, nr_vecs), gfp_mask); |
9f060e22 KO |
63 | inline_vecs = nr_vecs; |
64 | } else { | |
8aa6ba2f | 65 | bip = mempool_alloc(&bs->bio_integrity_pool, gfp_mask); |
9f060e22 | 66 | inline_vecs = BIP_INLINE_VECS; |
7ba1ba12 MP |
67 | } |
68 | ||
9f060e22 | 69 | if (unlikely(!bip)) |
06c1e390 | 70 | return ERR_PTR(-ENOMEM); |
9f060e22 | 71 | |
7878cba9 MP |
72 | memset(bip, 0, sizeof(*bip)); |
73 | ||
9f060e22 | 74 | if (nr_vecs > inline_vecs) { |
ed996a52 CH |
75 | unsigned long idx = 0; |
76 | ||
9f060e22 | 77 | bip->bip_vec = bvec_alloc(gfp_mask, nr_vecs, &idx, |
8aa6ba2f | 78 | &bs->bvec_integrity_pool); |
9f060e22 KO |
79 | if (!bip->bip_vec) |
80 | goto err; | |
cbcd1054 | 81 | bip->bip_max_vcnt = bvec_nr_vecs(idx); |
ed996a52 | 82 | bip->bip_slab = idx; |
9f060e22 KO |
83 | } else { |
84 | bip->bip_vec = bip->bip_inline_vecs; | |
cbcd1054 | 85 | bip->bip_max_vcnt = inline_vecs; |
9f060e22 KO |
86 | } |
87 | ||
7ba1ba12 MP |
88 | bip->bip_bio = bio; |
89 | bio->bi_integrity = bip; | |
1eff9d32 | 90 | bio->bi_opf |= REQ_INTEGRITY; |
7ba1ba12 MP |
91 | |
92 | return bip; | |
9f060e22 | 93 | err: |
0b8eb629 | 94 | __bio_integrity_free(bs, bip); |
06c1e390 | 95 | return ERR_PTR(-ENOMEM); |
7ba1ba12 | 96 | } |
7ba1ba12 MP |
97 | EXPORT_SYMBOL(bio_integrity_alloc); |
98 | ||
99 | /** | |
100 | * bio_integrity_free - Free bio integrity payload | |
101 | * @bio: bio containing bip to be freed | |
7ba1ba12 MP |
102 | * |
103 | * Description: Used to free the integrity portion of a bio. Usually | |
104 | * called from bio_free(). | |
105 | */ | |
ece841ab | 106 | void bio_integrity_free(struct bio *bio) |
7ba1ba12 | 107 | { |
180b2f95 | 108 | struct bio_integrity_payload *bip = bio_integrity(bio); |
1e2a410f KO |
109 | struct bio_set *bs = bio->bi_pool; |
110 | ||
b1f01388 | 111 | if (bip->bip_flags & BIP_BLOCK_INTEGRITY) |
5f9378fa MP |
112 | kfree(page_address(bip->bip_vec->bv_page) + |
113 | bip->bip_vec->bv_offset); | |
7ba1ba12 | 114 | |
0b8eb629 | 115 | __bio_integrity_free(bs, bip); |
7ba1ba12 | 116 | bio->bi_integrity = NULL; |
7c20f116 | 117 | bio->bi_opf &= ~REQ_INTEGRITY; |
7ba1ba12 | 118 | } |
7ba1ba12 MP |
119 | |
120 | /** | |
121 | * bio_integrity_add_page - Attach integrity metadata | |
122 | * @bio: bio to update | |
123 | * @page: page containing integrity metadata | |
124 | * @len: number of bytes of integrity metadata in page | |
125 | * @offset: start offset within page | |
126 | * | |
127 | * Description: Attach a page containing integrity metadata to bio. | |
128 | */ | |
129 | int bio_integrity_add_page(struct bio *bio, struct page *page, | |
130 | unsigned int len, unsigned int offset) | |
131 | { | |
180b2f95 | 132 | struct bio_integrity_payload *bip = bio_integrity(bio); |
7ba1ba12 MP |
133 | struct bio_vec *iv; |
134 | ||
cbcd1054 | 135 | if (bip->bip_vcnt >= bip->bip_max_vcnt) { |
7ba1ba12 MP |
136 | printk(KERN_ERR "%s: bip_vec full\n", __func__); |
137 | return 0; | |
138 | } | |
139 | ||
d57a5f7c | 140 | iv = bip->bip_vec + bip->bip_vcnt; |
7ba1ba12 | 141 | |
87a816df | 142 | if (bip->bip_vcnt && |
74d46992 | 143 | bvec_gap_to_prev(bio->bi_disk->queue, |
87a816df SG |
144 | &bip->bip_vec[bip->bip_vcnt - 1], offset)) |
145 | return 0; | |
146 | ||
7ba1ba12 MP |
147 | iv->bv_page = page; |
148 | iv->bv_len = len; | |
149 | iv->bv_offset = offset; | |
150 | bip->bip_vcnt++; | |
151 | ||
152 | return len; | |
153 | } | |
154 | EXPORT_SYMBOL(bio_integrity_add_page); | |
155 | ||
7ba1ba12 | 156 | /** |
18593088 | 157 | * bio_integrity_process - Process integrity metadata for a bio |
bf36f9cf | 158 | * @bio: bio to generate/verify integrity metadata for |
63573e35 | 159 | * @proc_iter: iterator to process |
18593088 | 160 | * @proc_fn: Pointer to the relevant processing function |
7ba1ba12 | 161 | */ |
4e4cbee9 | 162 | static blk_status_t bio_integrity_process(struct bio *bio, |
63573e35 | 163 | struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) |
7ba1ba12 | 164 | { |
74d46992 | 165 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
18593088 | 166 | struct blk_integrity_iter iter; |
594416a7 DW |
167 | struct bvec_iter bviter; |
168 | struct bio_vec bv; | |
5f9378fa | 169 | struct bio_integrity_payload *bip = bio_integrity(bio); |
4e4cbee9 | 170 | blk_status_t ret = BLK_STS_OK; |
5f9378fa MP |
171 | void *prot_buf = page_address(bip->bip_vec->bv_page) + |
172 | bip->bip_vec->bv_offset; | |
7ba1ba12 | 173 | |
74d46992 | 174 | iter.disk_name = bio->bi_disk->disk_name; |
a48f041d | 175 | iter.interval = 1 << bi->interval_exp; |
63573e35 | 176 | iter.seed = proc_iter->bi_sector; |
18593088 | 177 | iter.prot_buf = prot_buf; |
7ba1ba12 | 178 | |
63573e35 | 179 | __bio_for_each_segment(bv, bio, bviter, *proc_iter) { |
594416a7 | 180 | void *kaddr = kmap_atomic(bv.bv_page); |
7ba1ba12 | 181 | |
594416a7 DW |
182 | iter.data_buf = kaddr + bv.bv_offset; |
183 | iter.data_size = bv.bv_len; | |
18593088 MP |
184 | |
185 | ret = proc_fn(&iter); | |
186 | if (ret) { | |
187 | kunmap_atomic(kaddr); | |
188 | return ret; | |
189 | } | |
7ba1ba12 | 190 | |
e8e3c3d6 | 191 | kunmap_atomic(kaddr); |
7ba1ba12 | 192 | } |
bf36f9cf GZ |
193 | return ret; |
194 | } | |
195 | ||
7ba1ba12 MP |
196 | /** |
197 | * bio_integrity_prep - Prepare bio for integrity I/O | |
198 | * @bio: bio to prepare | |
199 | * | |
e23947bd DM |
200 | * Description: Checks if the bio already has an integrity payload attached. |
201 | * If it does, the payload has been generated by another kernel subsystem, | |
202 | * and we just pass it through. Otherwise allocates integrity payload. | |
203 | * The bio must have data direction, target device and start sector set priot | |
204 | * to calling. In the WRITE case, integrity metadata will be generated using | |
205 | * the block device's integrity function. In the READ case, the buffer | |
7ba1ba12 MP |
206 | * will be prepared for DMA and a suitable end_io handler set up. |
207 | */ | |
e23947bd | 208 | bool bio_integrity_prep(struct bio *bio) |
7ba1ba12 MP |
209 | { |
210 | struct bio_integrity_payload *bip; | |
74d46992 CH |
211 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
212 | struct request_queue *q = bio->bi_disk->queue; | |
7ba1ba12 MP |
213 | void *buf; |
214 | unsigned long start, end; | |
215 | unsigned int len, nr_pages; | |
216 | unsigned int bytes, offset, i; | |
3be91c4a | 217 | unsigned int intervals; |
e23947bd | 218 | blk_status_t status; |
7ba1ba12 | 219 | |
9346beb9 CH |
220 | if (!bi) |
221 | return true; | |
222 | ||
e23947bd DM |
223 | if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE) |
224 | return true; | |
225 | ||
226 | if (!bio_sectors(bio)) | |
227 | return true; | |
7ba1ba12 | 228 | |
e23947bd DM |
229 | /* Already protected? */ |
230 | if (bio_integrity(bio)) | |
231 | return true; | |
232 | ||
e23947bd DM |
233 | if (bio_data_dir(bio) == READ) { |
234 | if (!bi->profile->verify_fn || | |
235 | !(bi->flags & BLK_INTEGRITY_VERIFY)) | |
236 | return true; | |
237 | } else { | |
238 | if (!bi->profile->generate_fn || | |
239 | !(bi->flags & BLK_INTEGRITY_GENERATE)) | |
240 | return true; | |
241 | } | |
3be91c4a | 242 | intervals = bio_integrity_intervals(bi, bio_sectors(bio)); |
7ba1ba12 MP |
243 | |
244 | /* Allocate kernel buffer for protection data */ | |
3be91c4a | 245 | len = intervals * bi->tuple_size; |
72f46503 | 246 | buf = kmalloc(len, GFP_NOIO | q->bounce_gfp); |
e23947bd | 247 | status = BLK_STS_RESOURCE; |
7ba1ba12 MP |
248 | if (unlikely(buf == NULL)) { |
249 | printk(KERN_ERR "could not allocate integrity buffer\n"); | |
e23947bd | 250 | goto err_end_io; |
7ba1ba12 MP |
251 | } |
252 | ||
253 | end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
254 | start = ((unsigned long) buf) >> PAGE_SHIFT; | |
255 | nr_pages = end - start; | |
256 | ||
257 | /* Allocate bio integrity payload and integrity vectors */ | |
258 | bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages); | |
7b6c0f80 | 259 | if (IS_ERR(bip)) { |
7ba1ba12 MP |
260 | printk(KERN_ERR "could not allocate data integrity bioset\n"); |
261 | kfree(buf); | |
e23947bd DM |
262 | status = BLK_STS_RESOURCE; |
263 | goto err_end_io; | |
7ba1ba12 MP |
264 | } |
265 | ||
b1f01388 | 266 | bip->bip_flags |= BIP_BLOCK_INTEGRITY; |
d57a5f7c | 267 | bip->bip_iter.bi_size = len; |
18593088 | 268 | bip_set_seed(bip, bio->bi_iter.bi_sector); |
7ba1ba12 | 269 | |
aae7df50 MP |
270 | if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) |
271 | bip->bip_flags |= BIP_IP_CHECKSUM; | |
272 | ||
7ba1ba12 MP |
273 | /* Map it */ |
274 | offset = offset_in_page(buf); | |
275 | for (i = 0 ; i < nr_pages ; i++) { | |
276 | int ret; | |
277 | bytes = PAGE_SIZE - offset; | |
278 | ||
279 | if (len <= 0) | |
280 | break; | |
281 | ||
282 | if (bytes > len) | |
283 | bytes = len; | |
284 | ||
285 | ret = bio_integrity_add_page(bio, virt_to_page(buf), | |
286 | bytes, offset); | |
287 | ||
e7bf90e5 WW |
288 | if (ret == 0) { |
289 | printk(KERN_ERR "could not attach integrity payload\n"); | |
e7bf90e5 WW |
290 | status = BLK_STS_RESOURCE; |
291 | goto err_end_io; | |
292 | } | |
7ba1ba12 MP |
293 | |
294 | if (ret < bytes) | |
295 | break; | |
296 | ||
297 | buf += bytes; | |
298 | len -= bytes; | |
299 | offset = 0; | |
300 | } | |
301 | ||
7ba1ba12 | 302 | /* Auto-generate integrity metadata if this is a write */ |
63573e35 DM |
303 | if (bio_data_dir(bio) == WRITE) { |
304 | bio_integrity_process(bio, &bio->bi_iter, | |
305 | bi->profile->generate_fn); | |
7759eb23 ML |
306 | } else { |
307 | bip->bio_iter = bio->bi_iter; | |
63573e35 | 308 | } |
e23947bd DM |
309 | return true; |
310 | ||
311 | err_end_io: | |
312 | bio->bi_status = status; | |
313 | bio_endio(bio); | |
314 | return false; | |
7ba1ba12 | 315 | |
7ba1ba12 MP |
316 | } |
317 | EXPORT_SYMBOL(bio_integrity_prep); | |
318 | ||
7ba1ba12 MP |
319 | /** |
320 | * bio_integrity_verify_fn - Integrity I/O completion worker | |
321 | * @work: Work struct stored in bio to be verified | |
322 | * | |
323 | * Description: This workqueue function is called to complete a READ | |
324 | * request. The function verifies the transferred integrity metadata | |
325 | * and then calls the original bio end_io function. | |
326 | */ | |
327 | static void bio_integrity_verify_fn(struct work_struct *work) | |
328 | { | |
b984679e | 329 | struct bio_integrity_payload *bip = |
7ba1ba12 MP |
330 | container_of(work, struct bio_integrity_payload, bip_work); |
331 | struct bio *bio = bip->bip_bio; | |
74d46992 | 332 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
63573e35 DM |
333 | |
334 | /* | |
335 | * At the moment verify is called bio's iterator was advanced | |
336 | * during split and completion, we need to rewind iterator to | |
337 | * it's original position. | |
338 | */ | |
7759eb23 ML |
339 | bio->bi_status = bio_integrity_process(bio, &bip->bio_iter, |
340 | bi->profile->verify_fn); | |
7c20f116 | 341 | bio_integrity_free(bio); |
4246a0b6 | 342 | bio_endio(bio); |
7ba1ba12 MP |
343 | } |
344 | ||
345 | /** | |
7c20f116 | 346 | * __bio_integrity_endio - Integrity I/O completion function |
7ba1ba12 | 347 | * @bio: Protected bio |
7ba1ba12 MP |
348 | * |
349 | * Description: Completion for integrity I/O | |
350 | * | |
351 | * Normally I/O completion is done in interrupt context. However, | |
352 | * verifying I/O integrity is a time-consuming task which must be run | |
353 | * in process context. This function postpones completion | |
354 | * accordingly. | |
355 | */ | |
7c20f116 | 356 | bool __bio_integrity_endio(struct bio *bio) |
7ba1ba12 | 357 | { |
97e05463 | 358 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
f86e28c4 | 359 | struct bio_integrity_payload *bip = bio_integrity(bio); |
c775d209 MB |
360 | |
361 | if (bio_op(bio) == REQ_OP_READ && !bio->bi_status && | |
f86e28c4 | 362 | (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) { |
7c20f116 CH |
363 | INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); |
364 | queue_work(kintegrityd_wq, &bip->bip_work); | |
365 | return false; | |
7b24fc4d MP |
366 | } |
367 | ||
7c20f116 CH |
368 | bio_integrity_free(bio); |
369 | return true; | |
7ba1ba12 | 370 | } |
7ba1ba12 | 371 | |
7ba1ba12 MP |
372 | /** |
373 | * bio_integrity_advance - Advance integrity vector | |
374 | * @bio: bio whose integrity vector to update | |
375 | * @bytes_done: number of data bytes that have been completed | |
376 | * | |
377 | * Description: This function calculates how many integrity bytes the | |
378 | * number of completed data bytes correspond to and advances the | |
379 | * integrity vector accordingly. | |
380 | */ | |
381 | void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) | |
382 | { | |
180b2f95 | 383 | struct bio_integrity_payload *bip = bio_integrity(bio); |
74d46992 | 384 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
d57a5f7c | 385 | unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); |
7ba1ba12 | 386 | |
309a62fa | 387 | bip->bip_iter.bi_sector += bytes_done >> 9; |
d57a5f7c | 388 | bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); |
7ba1ba12 | 389 | } |
7ba1ba12 MP |
390 | |
391 | /** | |
392 | * bio_integrity_trim - Trim integrity vector | |
393 | * @bio: bio whose integrity vector to update | |
7ba1ba12 MP |
394 | * |
395 | * Description: Used to trim the integrity vector in a cloned bio. | |
7ba1ba12 | 396 | */ |
fbd08e76 | 397 | void bio_integrity_trim(struct bio *bio) |
7ba1ba12 | 398 | { |
180b2f95 | 399 | struct bio_integrity_payload *bip = bio_integrity(bio); |
74d46992 | 400 | struct blk_integrity *bi = blk_get_integrity(bio->bi_disk); |
7ba1ba12 | 401 | |
fbd08e76 | 402 | bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); |
7ba1ba12 MP |
403 | } |
404 | EXPORT_SYMBOL(bio_integrity_trim); | |
405 | ||
7ba1ba12 MP |
406 | /** |
407 | * bio_integrity_clone - Callback for cloning bios with integrity metadata | |
408 | * @bio: New bio | |
409 | * @bio_src: Original bio | |
87092698 | 410 | * @gfp_mask: Memory allocation mask |
7ba1ba12 MP |
411 | * |
412 | * Description: Called to allocate a bip when cloning a bio | |
413 | */ | |
7878cba9 | 414 | int bio_integrity_clone(struct bio *bio, struct bio *bio_src, |
1e2a410f | 415 | gfp_t gfp_mask) |
7ba1ba12 | 416 | { |
180b2f95 | 417 | struct bio_integrity_payload *bip_src = bio_integrity(bio_src); |
7ba1ba12 MP |
418 | struct bio_integrity_payload *bip; |
419 | ||
420 | BUG_ON(bip_src == NULL); | |
421 | ||
1e2a410f | 422 | bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt); |
7b6c0f80 DC |
423 | if (IS_ERR(bip)) |
424 | return PTR_ERR(bip); | |
7ba1ba12 MP |
425 | |
426 | memcpy(bip->bip_vec, bip_src->bip_vec, | |
427 | bip_src->bip_vcnt * sizeof(struct bio_vec)); | |
428 | ||
7ba1ba12 | 429 | bip->bip_vcnt = bip_src->bip_vcnt; |
d57a5f7c | 430 | bip->bip_iter = bip_src->bip_iter; |
7ba1ba12 MP |
431 | |
432 | return 0; | |
433 | } | |
434 | EXPORT_SYMBOL(bio_integrity_clone); | |
435 | ||
7878cba9 | 436 | int bioset_integrity_create(struct bio_set *bs, int pool_size) |
7ba1ba12 | 437 | { |
8aa6ba2f | 438 | if (mempool_initialized(&bs->bio_integrity_pool)) |
a91a2785 MP |
439 | return 0; |
440 | ||
8aa6ba2f KO |
441 | if (mempool_init_slab_pool(&bs->bio_integrity_pool, |
442 | pool_size, bip_slab)) | |
9f060e22 | 443 | return -1; |
7ba1ba12 | 444 | |
8aa6ba2f KO |
445 | if (biovec_init_pool(&bs->bvec_integrity_pool, pool_size)) { |
446 | mempool_exit(&bs->bio_integrity_pool); | |
7878cba9 | 447 | return -1; |
bc5c8f07 | 448 | } |
7878cba9 MP |
449 | |
450 | return 0; | |
451 | } | |
452 | EXPORT_SYMBOL(bioset_integrity_create); | |
453 | ||
454 | void bioset_integrity_free(struct bio_set *bs) | |
455 | { | |
8aa6ba2f KO |
456 | mempool_exit(&bs->bio_integrity_pool); |
457 | mempool_exit(&bs->bvec_integrity_pool); | |
7878cba9 | 458 | } |
7878cba9 MP |
459 | |
460 | void __init bio_integrity_init(void) | |
461 | { | |
a6e8dc46 TH |
462 | /* |
463 | * kintegrityd won't block much but may burn a lot of CPU cycles. | |
464 | * Make it highpri CPU intensive wq with max concurrency of 1. | |
465 | */ | |
466 | kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | | |
467 | WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); | |
6d2a78e7 MP |
468 | if (!kintegrityd_wq) |
469 | panic("Failed to create kintegrityd\n"); | |
7ba1ba12 | 470 | |
9f060e22 KO |
471 | bip_slab = kmem_cache_create("bio_integrity_payload", |
472 | sizeof(struct bio_integrity_payload) + | |
473 | sizeof(struct bio_vec) * BIP_INLINE_VECS, | |
474 | 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); | |
7ba1ba12 | 475 | } |