int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *info) { blkptr_t *bp = zio->io_bp; uint_t checksum = (bp == NULL ? zio->io_prop.zp_checksum : (BP_IS_GANG(bp) ? ZIO_CHECKSUM_GANG_HEADER : BP_GET_CHECKSUM(bp))); int byteswap; int error; uint64_t size = (bp == NULL ? zio->io_size : (BP_IS_GANG(bp) ? SPA_GANGBLOCKSIZE : BP_GET_PSIZE(bp))); uint64_t offset = zio->io_offset; void *data = zio->io_data; zio_checksum_info_t *ci = &zio_checksum_table[checksum]; zio_cksum_t actual_cksum, expected_cksum, verifier; if (checksum >= ZIO_CHECKSUM_FUNCTIONS || ci->ci_func[0] == NULL) return (EINVAL); if (ci->ci_eck) { zio_eck_t *eck; if (checksum == ZIO_CHECKSUM_ZILOG2) { zil_chain_t *zilc = data; uint64_t nused; eck = &zilc->zc_eck; if (eck->zec_magic == ZEC_MAGIC) nused = zilc->zc_nused; else if (eck->zec_magic == BSWAP_64(ZEC_MAGIC)) nused = BSWAP_64(zilc->zc_nused); else return (ECKSUM); if (nused > size) return (ECKSUM); size = P2ROUNDUP_TYPED(nused, ZIL_MIN_BLKSZ, uint64_t); } else { eck = (zio_eck_t *)((char *)data + size) - 1; } if (checksum == ZIO_CHECKSUM_GANG_HEADER) zio_checksum_gang_verifier(&verifier, bp); else if (checksum == ZIO_CHECKSUM_LABEL) zio_checksum_label_verifier(&verifier, offset); else verifier = bp->blk_cksum; byteswap = (eck->zec_magic == BSWAP_64(ZEC_MAGIC)); if (byteswap) byteswap_uint64_array(&verifier, sizeof (zio_cksum_t)); expected_cksum = eck->zec_cksum; eck->zec_cksum = verifier; ci->ci_func[byteswap](data, size, &actual_cksum); eck->zec_cksum = expected_cksum; if (byteswap) byteswap_uint64_array(&expected_cksum, sizeof (zio_cksum_t)); } else { ASSERT(!BP_IS_GANG(bp)); byteswap = BP_SHOULD_BYTESWAP(bp); expected_cksum = bp->blk_cksum; ci->ci_func[byteswap](data, size, &actual_cksum); } info->zbc_expected = expected_cksum; info->zbc_actual = actual_cksum; info->zbc_checksum_name = ci->ci_name; info->zbc_byteswapped = byteswap; info->zbc_injected = 0; info->zbc_has_cksum = 1; if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum)) { return (ECKSUM); } if (zio_injection_enabled && !zio->io_error && (error = zio_handle_fault_injection(zio, ECKSUM)) != 0) { info->zbc_injected = 1; return (error); } return (0); }
int main(int argc, char *argv[]) { char *buf = malloc(INITIAL_BUFLEN); dmu_replay_record_t thedrr; dmu_replay_record_t *drr = &thedrr; struct drr_begin *drrb = &thedrr.drr_u.drr_begin; struct drr_end *drre = &thedrr.drr_u.drr_end; struct drr_object *drro = &thedrr.drr_u.drr_object; struct drr_freeobjects *drrfo = &thedrr.drr_u.drr_freeobjects; struct drr_write *drrw = &thedrr.drr_u.drr_write; struct drr_write_byref *drrwbr = &thedrr.drr_u.drr_write_byref; struct drr_free *drrf = &thedrr.drr_u.drr_free; struct drr_spill *drrs = &thedrr.drr_u.drr_spill; char c; boolean_t verbose = B_FALSE; boolean_t first = B_TRUE; int err; zio_cksum_t zc = { 0 }; zio_cksum_t pcksum = { 0 }; while ((c = getopt(argc, argv, ":vC")) != -1) { switch (c) { case 'C': do_cksum = B_FALSE; break; case 'v': verbose = B_TRUE; break; case ':': (void) fprintf(stderr, "missing argument for '%c' option\n", optopt); usage(); break; case '?': (void) fprintf(stderr, "invalid option '%c'\n", optopt); usage(); } } if (isatty(STDIN_FILENO)) { (void) fprintf(stderr, "Error: Backup stream can not be read " "from a terminal.\n" "You must redirect standard input.\n"); exit(1); } send_stream = stdin; pcksum = zc; while (ssread(drr, sizeof (dmu_replay_record_t), &zc)) { if (first) { if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { do_byteswap = B_TRUE; if (do_cksum) { ZIO_SET_CHECKSUM(&zc, 0, 0, 0, 0); /* * recalculate header checksum now * that we know it needs to be * byteswapped. */ fletcher_4_incremental_byteswap(drr, sizeof (dmu_replay_record_t), &zc); } } else if (drrb->drr_magic != DMU_BACKUP_MAGIC) { (void) fprintf(stderr, "Invalid stream " "(bad magic number)\n"); exit(1); } first = B_FALSE; } if (do_byteswap) { drr->drr_type = BSWAP_32(drr->drr_type); drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); } /* * At this point, the leading fields of the replay record * (drr_type and drr_payloadlen) have been byte-swapped if * necessary, but the rest of the data structure (the * union of type-specific structures) is still in its * original state. */ if (drr->drr_type >= DRR_NUMTYPES) { (void) printf("INVALID record found: type 0x%x\n", drr->drr_type); (void) printf("Aborting.\n"); exit(1); } drr_record_count[drr->drr_type]++; switch (drr->drr_type) { case DRR_BEGIN: if (do_byteswap) { drrb->drr_magic = BSWAP_64(drrb->drr_magic); drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); drrb->drr_type = BSWAP_32(drrb->drr_type); drrb->drr_flags = BSWAP_32(drrb->drr_flags); drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); } (void) printf("BEGIN record\n"); (void) printf("\thdrtype = %lld\n", DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo)); (void) printf("\tfeatures = %llx\n", DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo)); (void) printf("\tmagic = %llx\n", (u_longlong_t)drrb->drr_magic); (void) printf("\tcreation_time = %llx\n", (u_longlong_t)drrb->drr_creation_time); (void) printf("\ttype = %u\n", drrb->drr_type); (void) printf("\tflags = 0x%x\n", drrb->drr_flags); (void) printf("\ttoguid = %llx\n", (u_longlong_t)drrb->drr_toguid); (void) printf("\tfromguid = %llx\n", (u_longlong_t)drrb->drr_fromguid); (void) printf("\ttoname = %s\n", drrb->drr_toname); if (verbose) (void) printf("\n"); if ((DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == DMU_COMPOUNDSTREAM) && drr->drr_payloadlen != 0) { nvlist_t *nv; int sz = drr->drr_payloadlen; if (sz > 1<<20) { free(buf); buf = malloc(sz); } (void) ssread(buf, sz, &zc); if (ferror(send_stream)) perror("fread"); err = nvlist_unpack(buf, sz, &nv, 0); if (err) perror(strerror(err)); nvlist_print(stdout, nv); nvlist_free(nv); } break; case DRR_END: if (do_byteswap) { drre->drr_checksum.zc_word[0] = BSWAP_64(drre->drr_checksum.zc_word[0]); drre->drr_checksum.zc_word[1] = BSWAP_64(drre->drr_checksum.zc_word[1]); drre->drr_checksum.zc_word[2] = BSWAP_64(drre->drr_checksum.zc_word[2]); drre->drr_checksum.zc_word[3] = BSWAP_64(drre->drr_checksum.zc_word[3]); } /* * We compare against the *previous* checksum * value, because the stored checksum is of * everything before the DRR_END record. */ if (do_cksum && !ZIO_CHECKSUM_EQUAL(drre->drr_checksum, pcksum)) { (void) printf("Expected checksum differs from " "checksum in stream.\n"); (void) printf("Expected checksum = %" FX64 "/%" FX64 "/%" FX64 "/%" FX64 "\n", pcksum.zc_word[0], pcksum.zc_word[1], pcksum.zc_word[2], pcksum.zc_word[3]); } (void) printf("END checksum = %" FX64 "/%" FX64 "/%" FX64 "/%" FX64 "\n", drre->drr_checksum.zc_word[0], drre->drr_checksum.zc_word[1], drre->drr_checksum.zc_word[2], drre->drr_checksum.zc_word[3]); ZIO_SET_CHECKSUM(&zc, 0, 0, 0, 0); break; case DRR_OBJECT: if (do_byteswap) { drro->drr_object = BSWAP_64(drro->drr_object); drro->drr_type = BSWAP_32(drro->drr_type); drro->drr_bonustype = BSWAP_32(drro->drr_bonustype); drro->drr_blksz = BSWAP_32(drro->drr_blksz); drro->drr_bonuslen = BSWAP_32(drro->drr_bonuslen); drro->drr_toguid = BSWAP_64(drro->drr_toguid); } if (verbose) { (void) printf("OBJECT object = %llu type = %u " "bonustype = %u blksz = %u bonuslen = %u\n", (u_longlong_t)drro->drr_object, drro->drr_type, drro->drr_bonustype, drro->drr_blksz, drro->drr_bonuslen); } if (drro->drr_bonuslen > 0) { (void) ssread(buf, P2ROUNDUP(drro->drr_bonuslen, 8), &zc); } break; case DRR_FREEOBJECTS: if (do_byteswap) { drrfo->drr_firstobj = BSWAP_64(drrfo->drr_firstobj); drrfo->drr_numobjs = BSWAP_64(drrfo->drr_numobjs); drrfo->drr_toguid = BSWAP_64(drrfo->drr_toguid); } if (verbose) { (void) printf("FREEOBJECTS firstobj = %llu " "numobjs = %llu\n", (u_longlong_t)drrfo->drr_firstobj, (u_longlong_t)drrfo->drr_numobjs); } break; case DRR_WRITE: if (do_byteswap) { drrw->drr_object = BSWAP_64(drrw->drr_object); drrw->drr_type = BSWAP_32(drrw->drr_type); drrw->drr_offset = BSWAP_64(drrw->drr_offset); drrw->drr_length = BSWAP_64(drrw->drr_length); drrw->drr_toguid = BSWAP_64(drrw->drr_toguid); drrw->drr_key.ddk_prop = BSWAP_64(drrw->drr_key.ddk_prop); } if (verbose) { (void) printf("WRITE object = %llu type = %u " "checksum type = %u\n" "offset = %llu length = %llu " "props = %llx\n", (u_longlong_t)drrw->drr_object, drrw->drr_type, drrw->drr_checksumtype, (u_longlong_t)drrw->drr_offset, (u_longlong_t)drrw->drr_length, (u_longlong_t)drrw->drr_key.ddk_prop); } (void) ssread(buf, drrw->drr_length, &zc); total_write_size += drrw->drr_length; break; case DRR_WRITE_BYREF: if (do_byteswap) { drrwbr->drr_object = BSWAP_64(drrwbr->drr_object); drrwbr->drr_offset = BSWAP_64(drrwbr->drr_offset); drrwbr->drr_length = BSWAP_64(drrwbr->drr_length); drrwbr->drr_toguid = BSWAP_64(drrwbr->drr_toguid); drrwbr->drr_refguid = BSWAP_64(drrwbr->drr_refguid); drrwbr->drr_refobject = BSWAP_64(drrwbr->drr_refobject); drrwbr->drr_refoffset = BSWAP_64(drrwbr->drr_refoffset); drrwbr->drr_key.ddk_prop = BSWAP_64(drrwbr->drr_key.ddk_prop); } if (verbose) { (void) printf("WRITE_BYREF object = %llu " "checksum type = %u props = %llx\n" "offset = %llu length = %llu\n" "toguid = %llx refguid = %llx\n" "refobject = %llu refoffset = %llu\n", (u_longlong_t)drrwbr->drr_object, drrwbr->drr_checksumtype, (u_longlong_t)drrwbr->drr_key.ddk_prop, (u_longlong_t)drrwbr->drr_offset, (u_longlong_t)drrwbr->drr_length, (u_longlong_t)drrwbr->drr_toguid, (u_longlong_t)drrwbr->drr_refguid, (u_longlong_t)drrwbr->drr_refobject, (u_longlong_t)drrwbr->drr_refoffset); } break; case DRR_FREE: if (do_byteswap) { drrf->drr_object = BSWAP_64(drrf->drr_object); drrf->drr_offset = BSWAP_64(drrf->drr_offset); drrf->drr_length = BSWAP_64(drrf->drr_length); } if (verbose) { (void) printf("FREE object = %llu " "offset = %llu length = %lld\n", (u_longlong_t)drrf->drr_object, (u_longlong_t)drrf->drr_offset, (longlong_t)drrf->drr_length); } break; case DRR_SPILL: if (do_byteswap) { drrs->drr_object = BSWAP_64(drrs->drr_object); drrs->drr_length = BSWAP_64(drrs->drr_length); } if (verbose) { (void) printf("SPILL block for object = %" FU64 "length = %" FU64 "\n", drrs->drr_object, drrs->drr_length); } (void) ssread(buf, drrs->drr_length, &zc); break; } pcksum = zc; } free(buf); /* Print final summary */ (void) printf("SUMMARY:\n"); (void) printf("\tTotal DRR_BEGIN records = %lld\n", (u_longlong_t)drr_record_count[DRR_BEGIN]); (void) printf("\tTotal DRR_END records = %lld\n", (u_longlong_t)drr_record_count[DRR_END]); (void) printf("\tTotal DRR_OBJECT records = %lld\n", (u_longlong_t)drr_record_count[DRR_OBJECT]); (void) printf("\tTotal DRR_FREEOBJECTS records = %lld\n", (u_longlong_t)drr_record_count[DRR_FREEOBJECTS]); (void) printf("\tTotal DRR_WRITE records = %lld\n", (u_longlong_t)drr_record_count[DRR_WRITE]); (void) printf("\tTotal DRR_FREE records = %lld\n", (u_longlong_t)drr_record_count[DRR_FREE]); (void) printf("\tTotal DRR_SPILL records = %lld\n", (u_longlong_t)drr_record_count[DRR_SPILL]); (void) printf("\tTotal records = %lld\n", (u_longlong_t)(drr_record_count[DRR_BEGIN] + drr_record_count[DRR_OBJECT] + drr_record_count[DRR_FREEOBJECTS] + drr_record_count[DRR_WRITE] + drr_record_count[DRR_FREE] + drr_record_count[DRR_SPILL] + drr_record_count[DRR_END])); (void) printf("\tTotal write size = %lld (0x%llx)\n", (u_longlong_t)total_write_size, (u_longlong_t)total_write_size); (void) printf("\tTotal stream length = %lld (0x%llx)\n", (u_longlong_t)total_stream_len, (u_longlong_t)total_stream_len); return (0); }
int zio_checksum_error_impl(spa_t *spa, blkptr_t *bp, enum zio_checksum checksum, abd_t *abd, uint64_t size, uint64_t offset, zio_bad_cksum_t *info) { zio_checksum_info_t *ci = &zio_checksum_table[checksum]; int byteswap; zio_cksum_t actual_cksum, expected_cksum; if (checksum >= ZIO_CHECKSUM_FUNCTIONS || ci->ci_func[0] == NULL) return (SET_ERROR(EINVAL)); zio_checksum_template_init(checksum, spa); if (ci->ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { zio_eck_t *eck; zio_cksum_t verifier; size_t eck_offset; uint64_t data_size = size; void *data = abd_borrow_buf_copy(abd, data_size); if (checksum == ZIO_CHECKSUM_ZILOG2) { zil_chain_t *zilc = data; uint64_t nused; eck = &zilc->zc_eck; if (eck->zec_magic == ZEC_MAGIC) { nused = zilc->zc_nused; } else if (eck->zec_magic == BSWAP_64(ZEC_MAGIC)) { nused = BSWAP_64(zilc->zc_nused); } else { abd_return_buf(abd, data, data_size); return (SET_ERROR(ECKSUM)); } if (nused > data_size) { abd_return_buf(abd, data, data_size); return (SET_ERROR(ECKSUM)); } size = P2ROUNDUP_TYPED(nused, ZIL_MIN_BLKSZ, uint64_t); } else { eck = (zio_eck_t *)((char *)data + data_size) - 1; } if (checksum == ZIO_CHECKSUM_GANG_HEADER) zio_checksum_gang_verifier(&verifier, bp); else if (checksum == ZIO_CHECKSUM_LABEL) zio_checksum_label_verifier(&verifier, offset); else verifier = bp->blk_cksum; byteswap = (eck->zec_magic == BSWAP_64(ZEC_MAGIC)); if (byteswap) byteswap_uint64_array(&verifier, sizeof (zio_cksum_t)); eck_offset = (size_t)(&eck->zec_cksum) - (size_t)data; expected_cksum = eck->zec_cksum; eck->zec_cksum = verifier; abd_return_buf_copy(abd, data, data_size); ci->ci_func[byteswap](abd, size, spa->spa_cksum_tmpls[checksum], &actual_cksum); abd_copy_from_buf_off(abd, &expected_cksum, eck_offset, sizeof (zio_cksum_t)); if (byteswap) { byteswap_uint64_array(&expected_cksum, sizeof (zio_cksum_t)); } } else { byteswap = BP_SHOULD_BYTESWAP(bp); expected_cksum = bp->blk_cksum; ci->ci_func[byteswap](abd, size, spa->spa_cksum_tmpls[checksum], &actual_cksum); } if (info != NULL) { info->zbc_expected = expected_cksum; info->zbc_actual = actual_cksum; info->zbc_checksum_name = ci->ci_name; info->zbc_byteswapped = byteswap; info->zbc_injected = 0; info->zbc_has_cksum = 1; } if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum)) return (SET_ERROR(ECKSUM)); return (0); }
int zio_checksum_error_impl(spa_t *spa, const blkptr_t *bp, enum zio_checksum checksum, abd_t *abd, uint64_t size, uint64_t offset, zio_bad_cksum_t *info) { zio_checksum_info_t *ci = &zio_checksum_table[checksum]; zio_cksum_t actual_cksum, expected_cksum; zio_eck_t eck; int byteswap; if (checksum >= ZIO_CHECKSUM_FUNCTIONS || ci->ci_func[0] == NULL) return (SET_ERROR(EINVAL)); zio_checksum_template_init(checksum, spa); if (ci->ci_flags & ZCHECKSUM_FLAG_EMBEDDED) { zio_cksum_t verifier; size_t eck_offset; if (checksum == ZIO_CHECKSUM_ZILOG2) { zil_chain_t zilc; uint64_t nused; abd_copy_to_buf(&zilc, abd, sizeof (zil_chain_t)); eck = zilc.zc_eck; eck_offset = offsetof(zil_chain_t, zc_eck) + offsetof(zio_eck_t, zec_cksum); if (eck.zec_magic == ZEC_MAGIC) { nused = zilc.zc_nused; } else if (eck.zec_magic == BSWAP_64(ZEC_MAGIC)) { nused = BSWAP_64(zilc.zc_nused); } else { return (SET_ERROR(ECKSUM)); } if (nused > size) { return (SET_ERROR(ECKSUM)); } size = P2ROUNDUP_TYPED(nused, ZIL_MIN_BLKSZ, uint64_t); } else { eck_offset = size - sizeof (zio_eck_t); abd_copy_to_buf_off(&eck, abd, eck_offset, sizeof (zio_eck_t)); eck_offset += offsetof(zio_eck_t, zec_cksum); } if (checksum == ZIO_CHECKSUM_GANG_HEADER) zio_checksum_gang_verifier(&verifier, bp); else if (checksum == ZIO_CHECKSUM_LABEL) zio_checksum_label_verifier(&verifier, offset); else verifier = bp->blk_cksum; byteswap = (eck.zec_magic == BSWAP_64(ZEC_MAGIC)); if (byteswap) byteswap_uint64_array(&verifier, sizeof (zio_cksum_t)); expected_cksum = eck.zec_cksum; abd_copy_from_buf_off(abd, &verifier, eck_offset, sizeof (zio_cksum_t)); ci->ci_func[byteswap](abd, size, spa->spa_cksum_tmpls[checksum], &actual_cksum); abd_copy_from_buf_off(abd, &expected_cksum, eck_offset, sizeof (zio_cksum_t)); if (byteswap) { byteswap_uint64_array(&expected_cksum, sizeof (zio_cksum_t)); } } else { byteswap = BP_SHOULD_BYTESWAP(bp); expected_cksum = bp->blk_cksum; ci->ci_func[byteswap](abd, size, spa->spa_cksum_tmpls[checksum], &actual_cksum); } /* * MAC checksums are a special case since half of this checksum will * actually be the encryption MAC. This will be verified by the * decryption process, so we just check the truncated checksum now. * Objset blocks use embedded MACs so we don't truncate the checksum * for them. */ if (bp != NULL && BP_USES_CRYPT(bp) && BP_GET_TYPE(bp) != DMU_OT_OBJSET) { if (!(ci->ci_flags & ZCHECKSUM_FLAG_DEDUP)) { actual_cksum.zc_word[0] ^= actual_cksum.zc_word[2]; actual_cksum.zc_word[1] ^= actual_cksum.zc_word[3]; } actual_cksum.zc_word[2] = 0; actual_cksum.zc_word[3] = 0; expected_cksum.zc_word[2] = 0; expected_cksum.zc_word[3] = 0; } if (info != NULL) { info->zbc_expected = expected_cksum; info->zbc_actual = actual_cksum; info->zbc_checksum_name = ci->ci_name; info->zbc_byteswapped = byteswap; info->zbc_injected = 0; info->zbc_has_cksum = 1; } if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum)) return (SET_ERROR(ECKSUM)); return (0); }
int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *info) { blkptr_t *bp = zio->io_bp; uint_t checksum = (bp == NULL ? zio->io_prop.zp_checksum : (BP_IS_GANG(bp) ? ZIO_CHECKSUM_GANG_HEADER : BP_GET_CHECKSUM(bp))); int byteswap; int error; uint64_t size = (bp == NULL ? zio->io_size : (BP_IS_GANG(bp) ? SPA_GANGBLOCKSIZE : BP_GET_PSIZE(bp))); uint64_t offset = zio->io_offset; void *data = zio->io_data; zio_checksum_info_t *ci = &zio_checksum_table[checksum]; zio_cksum_t actual_cksum, expected_cksum, verifier; if (checksum >= ZIO_CHECKSUM_FUNCTIONS || ci->ci_func[0] == NULL) return (SET_ERROR(EINVAL)); if (ci->ci_eck) { zio_eck_t *eck; if (checksum == ZIO_CHECKSUM_ZILOG2) { zil_chain_t *zilc = data; uint64_t nused; eck = &zilc->zc_eck; if (eck->zec_magic == ZEC_MAGIC) nused = zilc->zc_nused; else if (eck->zec_magic == BSWAP_64(ZEC_MAGIC)) nused = BSWAP_64(zilc->zc_nused); else return (SET_ERROR(ECKSUM)); if (nused > size) return (SET_ERROR(ECKSUM)); size = P2ROUNDUP_TYPED(nused, ZIL_MIN_BLKSZ, uint64_t); } else { eck = (zio_eck_t *)((char *)data + size) - 1; } if (checksum == ZIO_CHECKSUM_GANG_HEADER) zio_checksum_gang_verifier(&verifier, bp); else if (checksum == ZIO_CHECKSUM_LABEL) zio_checksum_label_verifier(&verifier, offset); else verifier = bp->blk_cksum; byteswap = (eck->zec_magic == BSWAP_64(ZEC_MAGIC)); if (byteswap) byteswap_uint64_array(&verifier, sizeof (zio_cksum_t)); expected_cksum = eck->zec_cksum; eck->zec_cksum = verifier; ci->ci_func[byteswap](data, size, &actual_cksum); eck->zec_cksum = expected_cksum; if (byteswap) byteswap_uint64_array(&expected_cksum, sizeof (zio_cksum_t)); } else { ASSERT(!BP_IS_GANG(bp)); byteswap = BP_SHOULD_BYTESWAP(bp); expected_cksum = bp->blk_cksum; ci->ci_func[byteswap](data, size, &actual_cksum); } info->zbc_expected = expected_cksum; info->zbc_actual = actual_cksum; info->zbc_checksum_name = ci->ci_name; info->zbc_byteswapped = byteswap; info->zbc_injected = 0; info->zbc_has_cksum = 1; /* * Special case for truncated checksums with crypto MAC * This may not be the best place to deal with this but it is here now. * * Words 0 and 1 and 32 bits of word 2 of the checksum are the * first 160 bytes of SHA256 hash. * The rest of words 2 and all of word 3 are the crypto MAC so * ignore those because we can't check them until we do the decryption * later, nor could we do them if the key wasn't present */ if (ci->ci_trunc) { if (!(0 == ( (actual_cksum.zc_word[0] - expected_cksum.zc_word[0]) | (actual_cksum.zc_word[1] - expected_cksum.zc_word[1]) | (BF64_GET(actual_cksum.zc_word[2], 0, 32) - BF64_GET(expected_cksum.zc_word[2], 0, 32))))) { return (ECKSUM); } } else if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum)) { return (SET_ERROR(ECKSUM)); } if (zio_injection_enabled && !zio->io_error && (error = zio_handle_fault_injection(zio, ECKSUM)) != 0) { info->zbc_injected = 1; return (error); } return (0); }