diff options
Diffstat (limited to 'cmd/zdb/zdb.c')
| -rw-r--r-- | cmd/zdb/zdb.c | 60 |
1 files changed, 58 insertions, 2 deletions
diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c index 81c9eaf8c649..2d35bd0f9ee5 100644 --- a/cmd/zdb/zdb.c +++ b/cmd/zdb/zdb.c @@ -26,6 +26,7 @@ * Copyright 2016 Nexenta Systems, Inc. * Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC. * Copyright (c) 2015, 2017, Intel Corporation. + * Copyright (c) 2019 Datto Inc. */ #include <stdio.h> @@ -6340,7 +6341,7 @@ name: * size - Amount of data to read, in hex, in bytes * flags - A string of characters specifying options * b: Decode a blkptr at given offset within block - * *c: Calculate and display checksums + * c: Calculate and display checksums * d: Decompress data before dumping * e: Byteswap data before dumping * g: Display data as a gang block header @@ -6348,7 +6349,6 @@ name: * p: Do I/O to physical offset * r: Dump raw data to stdout * - * * = not yet implemented */ static void zdb_read_block(char *thing, spa_t *spa) @@ -6566,6 +6566,62 @@ zdb_read_block(char *thing, spa_t *spa) else zdb_dump_block(thing, buf, size, flags); + /* + * If :c was specified, iterate through the checksum table to + * calculate and display each checksum for our specified + * DVA and length. + */ + if ((flags & ZDB_FLAG_CHECKSUM) && !(flags & ZDB_FLAG_RAW) && + !(flags & ZDB_FLAG_GBH)) { + zio_t *czio, *cio; + (void) printf("\n"); + for (enum zio_checksum ck = ZIO_CHECKSUM_LABEL; + ck < ZIO_CHECKSUM_FUNCTIONS; ck++) { + + if ((zio_checksum_table[ck].ci_flags & + ZCHECKSUM_FLAG_EMBEDDED) || + ck == ZIO_CHECKSUM_NOPARITY) { + continue; + } + BP_SET_CHECKSUM(bp, ck); + spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); + czio = zio_root(spa, NULL, NULL, ZIO_FLAG_CANFAIL); + czio->io_bp = bp; + + if (vd == vd->vdev_top) { + cio = zio_read(czio, spa, bp, pabd, psize, + NULL, NULL, + ZIO_PRIORITY_SYNC_READ, + ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | + ZIO_FLAG_DONT_RETRY, NULL); + zio_nowait(cio); + } else { + zio_nowait(zio_vdev_child_io(czio, bp, vd, + offset, pabd, psize, ZIO_TYPE_READ, + ZIO_PRIORITY_SYNC_READ, + ZIO_FLAG_DONT_CACHE | + ZIO_FLAG_DONT_PROPAGATE | + ZIO_FLAG_DONT_RETRY | + ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | + ZIO_FLAG_SPECULATIVE | + ZIO_FLAG_OPTIONAL, NULL, NULL)); + } + error = zio_wait(czio); + if (error == 0 || error == ECKSUM) { + zio_checksum_compute(czio, ck, pabd, lsize); + printf("%12s\tcksum=%llx:%llx:%llx:%llx\n", + zio_checksum_table[ck].ci_name, + (u_longlong_t)bp->blk_cksum.zc_word[0], + (u_longlong_t)bp->blk_cksum.zc_word[1], + (u_longlong_t)bp->blk_cksum.zc_word[2], + (u_longlong_t)bp->blk_cksum.zc_word[3]); + } else { + printf("error %d reading block\n", error); + } + spa_config_exit(spa, SCL_STATE, FTAG); + } + } + if (borrowed) abd_return_buf_copy(pabd, buf, size); |