X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fzio_checksum.c;h=c8fe20f2eb4ee79f6b017151ef4a25644746aaa3;hb=refs%2Fheads%2Frertzinger%2Ffeature-zpool-get--p;hp=bf7fe733fe0c8c2ba3a58c60e4833ebb81a8bdf2;hpb=172bb4bd5e4afef721dd4d2972d8680d983f144b;p=zfs.git diff --git a/module/zfs/zio_checksum.c b/module/zfs/zio_checksum.c index bf7fe73..c8fe20f 100644 --- a/module/zfs/zio_checksum.c +++ b/module/zfs/zio_checksum.c @@ -19,14 +19,15 @@ * CDDL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. */ #include #include #include #include +#include +#include /* * Checksum vectors. @@ -49,13 +50,13 @@ * we want the ability to take advantage of that hardware. * * Of course, we don't want a checksum upgrade to invalidate existing - * data, so we store the checksum *function* in five bits of the DVA. - * This gives us room for up to 32 different checksum functions. + * data, so we store the checksum *function* in eight bits of the bp. + * This gives us room for up to 256 different checksum functions. * * When writing a block, we always checksum it with the latest-and-greatest * checksum function of the appropriate strength. When reading a block, * we compare the expected checksum against the actual checksum, which we - * compute via the checksum function specified in the DVA encoding. + * compute via the checksum function specified by BP_GET_CHECKSUM(bp). */ /*ARGSUSED*/ @@ -66,19 +67,20 @@ zio_checksum_off(const void *buf, uint64_t size, zio_cksum_t *zcp) } zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS] = { - {{NULL, NULL}, 0, 0, "inherit"}, - {{NULL, NULL}, 0, 0, "on"}, - {{zio_checksum_off, zio_checksum_off}, 0, 0, "off"}, - {{zio_checksum_SHA256, zio_checksum_SHA256}, 1, 1, "label"}, - {{zio_checksum_SHA256, zio_checksum_SHA256}, 1, 1, "gang_header"}, - {{fletcher_2_native, fletcher_2_byteswap}, 0, 1, "zilog"}, - {{fletcher_2_native, fletcher_2_byteswap}, 0, 0, "fletcher2"}, - {{fletcher_4_native, fletcher_4_byteswap}, 1, 0, "fletcher4"}, - {{zio_checksum_SHA256, zio_checksum_SHA256}, 1, 0, "SHA256"}, + {{NULL, NULL}, 0, 0, 0, "inherit"}, + {{NULL, NULL}, 0, 0, 0, "on"}, + {{zio_checksum_off, zio_checksum_off}, 0, 0, 0, "off"}, + {{zio_checksum_SHA256, zio_checksum_SHA256}, 1, 1, 0, "label"}, + {{zio_checksum_SHA256, zio_checksum_SHA256}, 1, 1, 0, "gang_header"}, + {{fletcher_2_native, fletcher_2_byteswap}, 0, 1, 0, "zilog"}, + {{fletcher_2_native, fletcher_2_byteswap}, 0, 0, 0, "fletcher2"}, + {{fletcher_4_native, fletcher_4_byteswap}, 1, 0, 0, "fletcher4"}, + {{zio_checksum_SHA256, zio_checksum_SHA256}, 1, 0, 1, "sha256"}, + {{fletcher_4_native, fletcher_4_byteswap}, 0, 1, 0, "zilog2"}, }; -uint8_t -zio_checksum_select(uint8_t child, uint8_t parent) +enum zio_checksum +zio_checksum_select(enum zio_checksum child, enum zio_checksum parent) { ASSERT(child < ZIO_CHECKSUM_FUNCTIONS); ASSERT(parent < ZIO_CHECKSUM_FUNCTIONS); @@ -93,6 +95,29 @@ zio_checksum_select(uint8_t child, uint8_t parent) return (child); } +enum zio_checksum +zio_checksum_dedup_select(spa_t *spa, enum zio_checksum child, + enum zio_checksum parent) +{ + ASSERT((child & ZIO_CHECKSUM_MASK) < ZIO_CHECKSUM_FUNCTIONS); + ASSERT((parent & ZIO_CHECKSUM_MASK) < ZIO_CHECKSUM_FUNCTIONS); + ASSERT(parent != ZIO_CHECKSUM_INHERIT && parent != ZIO_CHECKSUM_ON); + + if (child == ZIO_CHECKSUM_INHERIT) + return (parent); + + if (child == ZIO_CHECKSUM_ON) + return (spa_dedup_checksum(spa)); + + if (child == (ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY)) + return (spa_dedup_checksum(spa) | ZIO_CHECKSUM_VERIFY); + + ASSERT(zio_checksum_table[child & ZIO_CHECKSUM_MASK].ci_dedup || + (child & ZIO_CHECKSUM_VERIFY) || child == ZIO_CHECKSUM_OFF); + + return (child); +} + /* * Set the external verifier for a gang block based on , * a tuple which is guaranteed to be unique for the life of the pool. @@ -101,7 +126,7 @@ static void zio_checksum_gang_verifier(zio_cksum_t *zcp, blkptr_t *bp) { dva_t *dva = BP_IDENTITY(bp); - uint64_t txg = bp->blk_birth; + uint64_t txg = BP_PHYSICAL_BIRTH(bp); ASSERT(BP_IS_GANG(bp)); @@ -128,47 +153,79 @@ zio_checksum_compute(zio_t *zio, enum zio_checksum checksum, { blkptr_t *bp = zio->io_bp; uint64_t offset = zio->io_offset; - zio_block_tail_t *zbt = (zio_block_tail_t *)((char *)data + size) - 1; zio_checksum_info_t *ci = &zio_checksum_table[checksum]; - zio_cksum_t zbt_cksum; + zio_cksum_t cksum; ASSERT((uint_t)checksum < ZIO_CHECKSUM_FUNCTIONS); ASSERT(ci->ci_func[0] != NULL); - if (ci->ci_zbt) { + if (ci->ci_eck) { + zio_eck_t *eck; + + if (checksum == ZIO_CHECKSUM_ZILOG2) { + zil_chain_t *zilc = data; + + size = P2ROUNDUP_TYPED(zilc->zc_nused, ZIL_MIN_BLKSZ, + uint64_t); + eck = &zilc->zc_eck; + } else { + eck = (zio_eck_t *)((char *)data + size) - 1; + } if (checksum == ZIO_CHECKSUM_GANG_HEADER) - zio_checksum_gang_verifier(&zbt->zbt_cksum, bp); + zio_checksum_gang_verifier(&eck->zec_cksum, bp); else if (checksum == ZIO_CHECKSUM_LABEL) - zio_checksum_label_verifier(&zbt->zbt_cksum, offset); + zio_checksum_label_verifier(&eck->zec_cksum, offset); else - bp->blk_cksum = zbt->zbt_cksum; - zbt->zbt_magic = ZBT_MAGIC; - ci->ci_func[0](data, size, &zbt_cksum); - zbt->zbt_cksum = zbt_cksum; + bp->blk_cksum = eck->zec_cksum; + eck->zec_magic = ZEC_MAGIC; + ci->ci_func[0](data, size, &cksum); + eck->zec_cksum = cksum; } else { ci->ci_func[0](data, size, &bp->blk_cksum); } } int -zio_checksum_error(zio_t *zio) +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; - void *data = zio->io_data; + 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; - zio_block_tail_t *zbt = (zio_block_tail_t *)((char *)data + size) - 1; + 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_zbt) { + 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) @@ -176,15 +233,15 @@ zio_checksum_error(zio_t *zio) else verifier = bp->blk_cksum; - byteswap = (zbt->zbt_magic == BSWAP_64(ZBT_MAGIC)); + byteswap = (eck->zec_magic == BSWAP_64(ZEC_MAGIC)); if (byteswap) byteswap_uint64_array(&verifier, sizeof (zio_cksum_t)); - expected_cksum = zbt->zbt_cksum; - zbt->zbt_cksum = verifier; + expected_cksum = eck->zec_cksum; + eck->zec_cksum = verifier; ci->ci_func[byteswap](data, size, &actual_cksum); - zbt->zbt_cksum = expected_cksum; + eck->zec_cksum = expected_cksum; if (byteswap) byteswap_uint64_array(&expected_cksum, @@ -196,11 +253,22 @@ zio_checksum_error(zio_t *zio) 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) - return (zio_handle_fault_injection(zio, ECKSUM)); + if (zio_injection_enabled && !zio->io_error && + (error = zio_handle_fault_injection(zio, ECKSUM)) != 0) { + + info->zbc_injected = 1; + return (error); + } return (0); }