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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
3c67d83a | 23 | * Copyright 2013 Saso Kiselkov. All rights reserved. |
a6255b7f | 24 | * Copyright (c) 2013, 2016 by Delphix. All rights reserved. |
34dc7c2f BB |
25 | */ |
26 | ||
34dc7c2f BB |
27 | #include <sys/zfs_context.h> |
28 | #include <sys/spa.h> | |
3c67d83a | 29 | #include <sys/spa_impl.h> |
34dc7c2f BB |
30 | #include <sys/zio.h> |
31 | #include <sys/zio_checksum.h> | |
428870ff | 32 | #include <sys/zil.h> |
a6255b7f | 33 | #include <sys/abd.h> |
428870ff | 34 | #include <zfs_fletcher.h> |
34dc7c2f BB |
35 | |
36 | /* | |
37 | * Checksum vectors. | |
38 | * | |
39 | * In the SPA, everything is checksummed. We support checksum vectors | |
40 | * for three distinct reasons: | |
41 | * | |
42 | * 1. Different kinds of data need different levels of protection. | |
43 | * For SPA metadata, we always want a very strong checksum. | |
44 | * For user data, we let users make the trade-off between speed | |
45 | * and checksum strength. | |
46 | * | |
47 | * 2. Cryptographic hash and MAC algorithms are an area of active research. | |
48 | * It is likely that in future hash functions will be at least as strong | |
49 | * as current best-of-breed, and may be substantially faster as well. | |
50 | * We want the ability to take advantage of these new hashes as soon as | |
51 | * they become available. | |
52 | * | |
53 | * 3. If someone develops hardware that can compute a strong hash quickly, | |
54 | * we want the ability to take advantage of that hardware. | |
55 | * | |
56 | * Of course, we don't want a checksum upgrade to invalidate existing | |
428870ff BB |
57 | * data, so we store the checksum *function* in eight bits of the bp. |
58 | * This gives us room for up to 256 different checksum functions. | |
34dc7c2f BB |
59 | * |
60 | * When writing a block, we always checksum it with the latest-and-greatest | |
61 | * checksum function of the appropriate strength. When reading a block, | |
62 | * we compare the expected checksum against the actual checksum, which we | |
428870ff | 63 | * compute via the checksum function specified by BP_GET_CHECKSUM(bp). |
3c67d83a TH |
64 | * |
65 | * SALTED CHECKSUMS | |
66 | * | |
67 | * To enable the use of less secure hash algorithms with dedup, we | |
68 | * introduce the notion of salted checksums (MACs, really). A salted | |
69 | * checksum is fed both a random 256-bit value (the salt) and the data | |
70 | * to be checksummed. This salt is kept secret (stored on the pool, but | |
71 | * never shown to the user). Thus even if an attacker knew of collision | |
72 | * weaknesses in the hash algorithm, they won't be able to mount a known | |
73 | * plaintext attack on the DDT, since the actual hash value cannot be | |
74 | * known ahead of time. How the salt is used is algorithm-specific | |
75 | * (some might simply prefix it to the data block, others might need to | |
76 | * utilize a full-blown HMAC). On disk the salt is stored in a ZAP | |
77 | * object in the MOS (DMU_POOL_CHECKSUM_SALT). | |
78 | * | |
79 | * CONTEXT TEMPLATES | |
80 | * | |
81 | * Some hashing algorithms need to perform a substantial amount of | |
82 | * initialization work (e.g. salted checksums above may need to pre-hash | |
83 | * the salt) before being able to process data. Performing this | |
84 | * redundant work for each block would be wasteful, so we instead allow | |
85 | * a checksum algorithm to do the work once (the first time it's used) | |
86 | * and then keep this pre-initialized context as a template inside the | |
87 | * spa_t (spa_cksum_tmpls). If the zio_checksum_info_t contains | |
88 | * non-NULL ci_tmpl_init and ci_tmpl_free callbacks, they are used to | |
89 | * construct and destruct the pre-initialized checksum context. The | |
90 | * pre-initialized context is then reused during each checksum | |
91 | * invocation and passed to the checksum function. | |
34dc7c2f BB |
92 | */ |
93 | ||
94 | /*ARGSUSED*/ | |
95 | static void | |
a6255b7f | 96 | abd_checksum_off(abd_t *abd, uint64_t size, |
4ea3f864 | 97 | const void *ctx_template, zio_cksum_t *zcp) |
34dc7c2f BB |
98 | { |
99 | ZIO_SET_CHECKSUM(zcp, 0, 0, 0, 0); | |
100 | } | |
101 | ||
a6255b7f DQ |
102 | /*ARGSUSED*/ |
103 | void | |
104 | abd_fletcher_2_native(abd_t *abd, uint64_t size, | |
105 | const void *ctx_template, zio_cksum_t *zcp) | |
106 | { | |
107 | fletcher_init(zcp); | |
108 | (void) abd_iterate_func(abd, 0, size, | |
109 | fletcher_2_incremental_native, zcp); | |
110 | } | |
111 | ||
112 | /*ARGSUSED*/ | |
113 | void | |
114 | abd_fletcher_2_byteswap(abd_t *abd, uint64_t size, | |
115 | const void *ctx_template, zio_cksum_t *zcp) | |
116 | { | |
117 | fletcher_init(zcp); | |
118 | (void) abd_iterate_func(abd, 0, size, | |
119 | fletcher_2_incremental_byteswap, zcp); | |
120 | } | |
121 | ||
122 | /*ARGSUSED*/ | |
123 | void | |
124 | abd_fletcher_4_native(abd_t *abd, uint64_t size, | |
125 | const void *ctx_template, zio_cksum_t *zcp) | |
126 | { | |
127 | fletcher_init(zcp); | |
128 | (void) abd_iterate_func(abd, 0, size, | |
129 | fletcher_4_incremental_native, zcp); | |
130 | } | |
131 | ||
132 | /*ARGSUSED*/ | |
133 | void | |
134 | abd_fletcher_4_byteswap(abd_t *abd, uint64_t size, | |
135 | const void *ctx_template, zio_cksum_t *zcp) | |
136 | { | |
137 | fletcher_init(zcp); | |
138 | (void) abd_iterate_func(abd, 0, size, | |
139 | fletcher_4_incremental_byteswap, zcp); | |
140 | } | |
141 | ||
34dc7c2f | 142 | zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS] = { |
3c67d83a TH |
143 | {{NULL, NULL}, NULL, NULL, 0, "inherit"}, |
144 | {{NULL, NULL}, NULL, NULL, 0, "on"}, | |
a6255b7f | 145 | {{abd_checksum_off, abd_checksum_off}, |
3c67d83a | 146 | NULL, NULL, 0, "off"}, |
a6255b7f | 147 | {{abd_checksum_SHA256, abd_checksum_SHA256}, |
3c67d83a TH |
148 | NULL, NULL, ZCHECKSUM_FLAG_METADATA | ZCHECKSUM_FLAG_EMBEDDED, |
149 | "label"}, | |
a6255b7f | 150 | {{abd_checksum_SHA256, abd_checksum_SHA256}, |
3c67d83a TH |
151 | NULL, NULL, ZCHECKSUM_FLAG_METADATA | ZCHECKSUM_FLAG_EMBEDDED, |
152 | "gang_header"}, | |
a6255b7f | 153 | {{abd_fletcher_2_native, abd_fletcher_2_byteswap}, |
3c67d83a | 154 | NULL, NULL, ZCHECKSUM_FLAG_EMBEDDED, "zilog"}, |
a6255b7f | 155 | {{abd_fletcher_2_native, abd_fletcher_2_byteswap}, |
3c67d83a | 156 | NULL, NULL, 0, "fletcher2"}, |
a6255b7f | 157 | {{abd_fletcher_4_native, abd_fletcher_4_byteswap}, |
3c67d83a | 158 | NULL, NULL, ZCHECKSUM_FLAG_METADATA, "fletcher4"}, |
a6255b7f | 159 | {{abd_checksum_SHA256, abd_checksum_SHA256}, |
3c67d83a TH |
160 | NULL, NULL, ZCHECKSUM_FLAG_METADATA | ZCHECKSUM_FLAG_DEDUP | |
161 | ZCHECKSUM_FLAG_NOPWRITE, "sha256"}, | |
a6255b7f | 162 | {{abd_fletcher_4_native, abd_fletcher_4_byteswap}, |
3c67d83a | 163 | NULL, NULL, ZCHECKSUM_FLAG_EMBEDDED, "zilog2"}, |
a6255b7f | 164 | {{abd_checksum_off, abd_checksum_off}, |
3c67d83a | 165 | NULL, NULL, 0, "noparity"}, |
a6255b7f | 166 | {{abd_checksum_SHA512_native, abd_checksum_SHA512_byteswap}, |
3c67d83a TH |
167 | NULL, NULL, ZCHECKSUM_FLAG_METADATA | ZCHECKSUM_FLAG_DEDUP | |
168 | ZCHECKSUM_FLAG_NOPWRITE, "sha512"}, | |
a6255b7f DQ |
169 | {{abd_checksum_skein_native, abd_checksum_skein_byteswap}, |
170 | abd_checksum_skein_tmpl_init, abd_checksum_skein_tmpl_free, | |
3c67d83a TH |
171 | ZCHECKSUM_FLAG_METADATA | ZCHECKSUM_FLAG_DEDUP | |
172 | ZCHECKSUM_FLAG_SALTED | ZCHECKSUM_FLAG_NOPWRITE, "skein"}, | |
a6255b7f DQ |
173 | {{abd_checksum_edonr_native, abd_checksum_edonr_byteswap}, |
174 | abd_checksum_edonr_tmpl_init, abd_checksum_edonr_tmpl_free, | |
3c67d83a TH |
175 | ZCHECKSUM_FLAG_METADATA | ZCHECKSUM_FLAG_SALTED | |
176 | ZCHECKSUM_FLAG_NOPWRITE, "edonr"}, | |
34dc7c2f BB |
177 | }; |
178 | ||
4a2e9a17 | 179 | /* |
180 | * The flag corresponding to the "verify" in dedup=[checksum,]verify | |
181 | * must be cleared first, so callers should use ZIO_CHECKSUM_MASK. | |
182 | */ | |
3c67d83a TH |
183 | spa_feature_t |
184 | zio_checksum_to_feature(enum zio_checksum cksum) | |
185 | { | |
4a2e9a17 | 186 | VERIFY((cksum & ~ZIO_CHECKSUM_MASK) == 0); |
187 | ||
3c67d83a TH |
188 | switch (cksum) { |
189 | case ZIO_CHECKSUM_SHA512: | |
190 | return (SPA_FEATURE_SHA512); | |
191 | case ZIO_CHECKSUM_SKEIN: | |
192 | return (SPA_FEATURE_SKEIN); | |
193 | case ZIO_CHECKSUM_EDONR: | |
194 | return (SPA_FEATURE_EDONR); | |
195 | default: | |
196 | return (SPA_FEATURE_NONE); | |
197 | } | |
198 | } | |
199 | ||
428870ff BB |
200 | enum zio_checksum |
201 | zio_checksum_select(enum zio_checksum child, enum zio_checksum parent) | |
34dc7c2f BB |
202 | { |
203 | ASSERT(child < ZIO_CHECKSUM_FUNCTIONS); | |
204 | ASSERT(parent < ZIO_CHECKSUM_FUNCTIONS); | |
205 | ASSERT(parent != ZIO_CHECKSUM_INHERIT && parent != ZIO_CHECKSUM_ON); | |
206 | ||
207 | if (child == ZIO_CHECKSUM_INHERIT) | |
208 | return (parent); | |
209 | ||
210 | if (child == ZIO_CHECKSUM_ON) | |
211 | return (ZIO_CHECKSUM_ON_VALUE); | |
212 | ||
213 | return (child); | |
214 | } | |
215 | ||
428870ff BB |
216 | enum zio_checksum |
217 | zio_checksum_dedup_select(spa_t *spa, enum zio_checksum child, | |
218 | enum zio_checksum parent) | |
219 | { | |
220 | ASSERT((child & ZIO_CHECKSUM_MASK) < ZIO_CHECKSUM_FUNCTIONS); | |
221 | ASSERT((parent & ZIO_CHECKSUM_MASK) < ZIO_CHECKSUM_FUNCTIONS); | |
222 | ASSERT(parent != ZIO_CHECKSUM_INHERIT && parent != ZIO_CHECKSUM_ON); | |
223 | ||
224 | if (child == ZIO_CHECKSUM_INHERIT) | |
225 | return (parent); | |
226 | ||
227 | if (child == ZIO_CHECKSUM_ON) | |
228 | return (spa_dedup_checksum(spa)); | |
229 | ||
230 | if (child == (ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY)) | |
231 | return (spa_dedup_checksum(spa) | ZIO_CHECKSUM_VERIFY); | |
232 | ||
3c67d83a TH |
233 | ASSERT((zio_checksum_table[child & ZIO_CHECKSUM_MASK].ci_flags & |
234 | ZCHECKSUM_FLAG_DEDUP) || | |
428870ff BB |
235 | (child & ZIO_CHECKSUM_VERIFY) || child == ZIO_CHECKSUM_OFF); |
236 | ||
237 | return (child); | |
238 | } | |
239 | ||
b128c09f BB |
240 | /* |
241 | * Set the external verifier for a gang block based on <vdev, offset, txg>, | |
242 | * a tuple which is guaranteed to be unique for the life of the pool. | |
243 | */ | |
244 | static void | |
245 | zio_checksum_gang_verifier(zio_cksum_t *zcp, blkptr_t *bp) | |
246 | { | |
9b67f605 | 247 | const dva_t *dva = BP_IDENTITY(bp); |
428870ff | 248 | uint64_t txg = BP_PHYSICAL_BIRTH(bp); |
b128c09f BB |
249 | |
250 | ASSERT(BP_IS_GANG(bp)); | |
251 | ||
252 | ZIO_SET_CHECKSUM(zcp, DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva), txg, 0); | |
253 | } | |
254 | ||
255 | /* | |
256 | * Set the external verifier for a label block based on its offset. | |
257 | * The vdev is implicit, and the txg is unknowable at pool open time -- | |
258 | * hence the logic in vdev_uberblock_load() to find the most recent copy. | |
259 | */ | |
260 | static void | |
261 | zio_checksum_label_verifier(zio_cksum_t *zcp, uint64_t offset) | |
262 | { | |
263 | ZIO_SET_CHECKSUM(zcp, offset, 0, 0, 0); | |
264 | } | |
265 | ||
3c67d83a TH |
266 | /* |
267 | * Calls the template init function of a checksum which supports context | |
268 | * templates and installs the template into the spa_t. | |
269 | */ | |
270 | static void | |
271 | zio_checksum_template_init(enum zio_checksum checksum, spa_t *spa) | |
272 | { | |
273 | zio_checksum_info_t *ci = &zio_checksum_table[checksum]; | |
274 | ||
275 | if (ci->ci_tmpl_init == NULL) | |
276 | return; | |
277 | if (spa->spa_cksum_tmpls[checksum] != NULL) | |
278 | return; | |
279 | ||
280 | VERIFY(ci->ci_tmpl_free != NULL); | |
281 | mutex_enter(&spa->spa_cksum_tmpls_lock); | |
282 | if (spa->spa_cksum_tmpls[checksum] == NULL) { | |
283 | spa->spa_cksum_tmpls[checksum] = | |
284 | ci->ci_tmpl_init(&spa->spa_cksum_salt); | |
285 | VERIFY(spa->spa_cksum_tmpls[checksum] != NULL); | |
286 | } | |
287 | mutex_exit(&spa->spa_cksum_tmpls_lock); | |
288 | } | |
289 | ||
34dc7c2f BB |
290 | /* |
291 | * Generate the checksum. | |
292 | */ | |
293 | void | |
b128c09f | 294 | zio_checksum_compute(zio_t *zio, enum zio_checksum checksum, |
a6255b7f | 295 | abd_t *abd, uint64_t size) |
34dc7c2f | 296 | { |
b128c09f BB |
297 | blkptr_t *bp = zio->io_bp; |
298 | uint64_t offset = zio->io_offset; | |
34dc7c2f | 299 | zio_checksum_info_t *ci = &zio_checksum_table[checksum]; |
428870ff | 300 | zio_cksum_t cksum; |
3c67d83a | 301 | spa_t *spa = zio->io_spa; |
34dc7c2f | 302 | |
b128c09f | 303 | ASSERT((uint_t)checksum < ZIO_CHECKSUM_FUNCTIONS); |
34dc7c2f BB |
304 | ASSERT(ci->ci_func[0] != NULL); |
305 | ||
3c67d83a TH |
306 | zio_checksum_template_init(checksum, spa); |
307 | ||
308 | if (ci->ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { | |
428870ff | 309 | zio_eck_t *eck; |
a6255b7f | 310 | void *data = abd_to_buf(abd); |
428870ff BB |
311 | |
312 | if (checksum == ZIO_CHECKSUM_ZILOG2) { | |
313 | zil_chain_t *zilc = data; | |
314 | ||
315 | size = P2ROUNDUP_TYPED(zilc->zc_nused, ZIL_MIN_BLKSZ, | |
316 | uint64_t); | |
317 | eck = &zilc->zc_eck; | |
318 | } else { | |
319 | eck = (zio_eck_t *)((char *)data + size) - 1; | |
320 | } | |
b128c09f | 321 | if (checksum == ZIO_CHECKSUM_GANG_HEADER) |
428870ff | 322 | zio_checksum_gang_verifier(&eck->zec_cksum, bp); |
b128c09f | 323 | else if (checksum == ZIO_CHECKSUM_LABEL) |
428870ff | 324 | zio_checksum_label_verifier(&eck->zec_cksum, offset); |
b128c09f | 325 | else |
428870ff BB |
326 | bp->blk_cksum = eck->zec_cksum; |
327 | eck->zec_magic = ZEC_MAGIC; | |
a6255b7f | 328 | ci->ci_func[0](abd, size, spa->spa_cksum_tmpls[checksum], |
3c67d83a | 329 | &cksum); |
428870ff | 330 | eck->zec_cksum = cksum; |
34dc7c2f | 331 | } else { |
a6255b7f | 332 | ci->ci_func[0](abd, size, spa->spa_cksum_tmpls[checksum], |
3c67d83a | 333 | &bp->blk_cksum); |
34dc7c2f BB |
334 | } |
335 | } | |
336 | ||
337 | int | |
d3c2ae1c | 338 | zio_checksum_error_impl(spa_t *spa, blkptr_t *bp, enum zio_checksum checksum, |
a6255b7f | 339 | abd_t *abd, uint64_t size, uint64_t offset, zio_bad_cksum_t *info) |
34dc7c2f | 340 | { |
34dc7c2f | 341 | zio_checksum_info_t *ci = &zio_checksum_table[checksum]; |
d3c2ae1c | 342 | int byteswap; |
3c67d83a | 343 | zio_cksum_t actual_cksum, expected_cksum; |
34dc7c2f BB |
344 | |
345 | if (checksum >= ZIO_CHECKSUM_FUNCTIONS || ci->ci_func[0] == NULL) | |
2e528b49 | 346 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 347 | |
3c67d83a TH |
348 | zio_checksum_template_init(checksum, spa); |
349 | ||
350 | if (ci->ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { | |
428870ff | 351 | zio_eck_t *eck; |
d3c2ae1c | 352 | zio_cksum_t verifier; |
a6255b7f DQ |
353 | size_t eck_offset; |
354 | uint64_t data_size = size; | |
355 | void *data = abd_borrow_buf_copy(abd, data_size); | |
428870ff BB |
356 | |
357 | if (checksum == ZIO_CHECKSUM_ZILOG2) { | |
358 | zil_chain_t *zilc = data; | |
359 | uint64_t nused; | |
360 | ||
361 | eck = &zilc->zc_eck; | |
a6255b7f | 362 | if (eck->zec_magic == ZEC_MAGIC) { |
428870ff | 363 | nused = zilc->zc_nused; |
a6255b7f | 364 | } else if (eck->zec_magic == BSWAP_64(ZEC_MAGIC)) { |
428870ff | 365 | nused = BSWAP_64(zilc->zc_nused); |
a6255b7f DQ |
366 | } else { |
367 | abd_return_buf(abd, data, data_size); | |
2e528b49 | 368 | return (SET_ERROR(ECKSUM)); |
a6255b7f | 369 | } |
428870ff | 370 | |
a6255b7f DQ |
371 | if (nused > data_size) { |
372 | abd_return_buf(abd, data, data_size); | |
2e528b49 | 373 | return (SET_ERROR(ECKSUM)); |
a6255b7f | 374 | } |
428870ff BB |
375 | |
376 | size = P2ROUNDUP_TYPED(nused, ZIL_MIN_BLKSZ, uint64_t); | |
377 | } else { | |
a6255b7f | 378 | eck = (zio_eck_t *)((char *)data + data_size) - 1; |
428870ff BB |
379 | } |
380 | ||
34dc7c2f | 381 | if (checksum == ZIO_CHECKSUM_GANG_HEADER) |
b128c09f BB |
382 | zio_checksum_gang_verifier(&verifier, bp); |
383 | else if (checksum == ZIO_CHECKSUM_LABEL) | |
384 | zio_checksum_label_verifier(&verifier, offset); | |
385 | else | |
386 | verifier = bp->blk_cksum; | |
387 | ||
428870ff | 388 | byteswap = (eck->zec_magic == BSWAP_64(ZEC_MAGIC)); |
34dc7c2f | 389 | |
b128c09f BB |
390 | if (byteswap) |
391 | byteswap_uint64_array(&verifier, sizeof (zio_cksum_t)); | |
392 | ||
a6255b7f | 393 | eck_offset = (size_t)(&eck->zec_cksum) - (size_t)data; |
428870ff BB |
394 | expected_cksum = eck->zec_cksum; |
395 | eck->zec_cksum = verifier; | |
a6255b7f DQ |
396 | abd_return_buf_copy(abd, data, data_size); |
397 | ||
398 | ci->ci_func[byteswap](abd, size, | |
3c67d83a | 399 | spa->spa_cksum_tmpls[checksum], &actual_cksum); |
a6255b7f DQ |
400 | abd_copy_from_buf_off(abd, &expected_cksum, |
401 | eck_offset, sizeof (zio_cksum_t)); | |
b128c09f | 402 | |
d3c2ae1c | 403 | if (byteswap) { |
34dc7c2f BB |
404 | byteswap_uint64_array(&expected_cksum, |
405 | sizeof (zio_cksum_t)); | |
d3c2ae1c | 406 | } |
34dc7c2f | 407 | } else { |
b128c09f BB |
408 | byteswap = BP_SHOULD_BYTESWAP(bp); |
409 | expected_cksum = bp->blk_cksum; | |
a6255b7f | 410 | ci->ci_func[byteswap](abd, size, |
3c67d83a | 411 | spa->spa_cksum_tmpls[checksum], &actual_cksum); |
34dc7c2f BB |
412 | } |
413 | ||
d3c2ae1c GW |
414 | if (info != NULL) { |
415 | info->zbc_expected = expected_cksum; | |
416 | info->zbc_actual = actual_cksum; | |
417 | info->zbc_checksum_name = ci->ci_name; | |
418 | info->zbc_byteswapped = byteswap; | |
419 | info->zbc_injected = 0; | |
420 | info->zbc_has_cksum = 1; | |
421 | } | |
428870ff | 422 | |
b128c09f | 423 | if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum)) |
2e528b49 | 424 | return (SET_ERROR(ECKSUM)); |
34dc7c2f | 425 | |
d3c2ae1c GW |
426 | return (0); |
427 | } | |
428 | ||
429 | int | |
430 | zio_checksum_error(zio_t *zio, zio_bad_cksum_t *info) | |
431 | { | |
432 | blkptr_t *bp = zio->io_bp; | |
433 | uint_t checksum = (bp == NULL ? zio->io_prop.zp_checksum : | |
434 | (BP_IS_GANG(bp) ? ZIO_CHECKSUM_GANG_HEADER : BP_GET_CHECKSUM(bp))); | |
435 | int error; | |
436 | uint64_t size = (bp == NULL ? zio->io_size : | |
437 | (BP_IS_GANG(bp) ? SPA_GANGBLOCKSIZE : BP_GET_PSIZE(bp))); | |
438 | uint64_t offset = zio->io_offset; | |
a6255b7f | 439 | abd_t *data = zio->io_abd; |
d3c2ae1c GW |
440 | spa_t *spa = zio->io_spa; |
441 | ||
442 | error = zio_checksum_error_impl(spa, bp, checksum, data, size, | |
443 | offset, info); | |
444 | if (error != 0 && zio_injection_enabled && !zio->io_error && | |
428870ff BB |
445 | (error = zio_handle_fault_injection(zio, ECKSUM)) != 0) { |
446 | ||
447 | info->zbc_injected = 1; | |
448 | return (error); | |
449 | } | |
d3c2ae1c | 450 | return (error); |
34dc7c2f | 451 | } |
3c67d83a TH |
452 | |
453 | /* | |
454 | * Called by a spa_t that's about to be deallocated. This steps through | |
455 | * all of the checksum context templates and deallocates any that were | |
456 | * initialized using the algorithm-specific template init function. | |
457 | */ | |
458 | void | |
459 | zio_checksum_templates_free(spa_t *spa) | |
460 | { | |
461 | enum zio_checksum checksum; | |
462 | for (checksum = 0; checksum < ZIO_CHECKSUM_FUNCTIONS; | |
463 | checksum++) { | |
464 | if (spa->spa_cksum_tmpls[checksum] != NULL) { | |
465 | zio_checksum_info_t *ci = &zio_checksum_table[checksum]; | |
466 | ||
467 | VERIFY(ci->ci_tmpl_free != NULL); | |
468 | ci->ci_tmpl_free(spa->spa_cksum_tmpls[checksum]); | |
469 | spa->spa_cksum_tmpls[checksum] = NULL; | |
470 | } | |
471 | } | |
472 | } |