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ZFS send/recv with ashift 9->12 leads to data corruption

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Improve the ability of zfs send to determine if a block is compressed
or not by using information contained in the blkptr.

Reviewed-by: Rich Ercolani <rincebrain@gmail.com>
Reviewed-by: Matthew Ahrens <matthew.ahrens@delphix.com>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #12770
This commit is contained in:
Paul Dagnelie 2021-12-07 10:27:59 -08:00 committed by GitHub
parent b6fc42b5e1
commit 376027331d
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 17 additions and 7 deletions
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1
module/zfs/arc.c
View File

@ -2070,7 +2070,6 @@ arc_buf_fill(arc_buf_t *buf, spa_t *spa, const zbookmark_phys_t *zb,
} else {
ASSERT(hdr_compressed);
ASSERT(!compressed);
ASSERT3U(HDR_GET_LSIZE(hdr), !=, HDR_GET_PSIZE(hdr));
/*
* If the buf is sharing its data with the hdr, unlink it and

23
module/zfs/dmu_send.c
View File

@ -165,6 +165,7 @@ struct send_range {
kmutex_t lock;
kcondvar_t cv;
boolean_t io_outstanding;
boolean_t io_compressed;
int io_err;
} data;
struct srh {
@ -450,7 +451,8 @@ dump_redact(dmu_send_cookie_t *dscp, uint64_t object, uint64_t offset,
static int
dmu_dump_write(dmu_send_cookie_t *dscp, dmu_object_type_t type, uint64_t object,
uint64_t offset, int lsize, int psize, const blkptr_t *bp, void *data)
uint64_t offset, int lsize, int psize, const blkptr_t *bp,
boolean_t io_compressed, void *data)
{
uint64_t payload_size;
boolean_t raw = (dscp->dsc_featureflags & DMU_BACKUP_FEATURE_RAW);
@ -487,7 +489,10 @@ dmu_dump_write(dmu_send_cookie_t *dscp, dmu_object_type_t type, uint64_t object,
drrw->drr_logical_size = lsize;
/* only set the compression fields if the buf is compressed or raw */
if (raw || lsize != psize) {
boolean_t compressed =
(bp != NULL ? BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF &&
io_compressed : lsize != psize);
if (raw || compressed) {
ASSERT(raw || dscp->dsc_featureflags &
DMU_BACKUP_FEATURE_COMPRESSED);
ASSERT(!BP_IS_EMBEDDED(bp));
@ -1014,7 +1019,8 @@ do_dump(dmu_send_cookie_t *dscp, struct send_range *range)
int n = MIN(srdp->datablksz,
SPA_OLD_MAXBLOCKSIZE);
err = dmu_dump_write(dscp, srdp->obj_type,
range->object, offset, n, n, NULL, data);
range->object, offset, n, n, NULL, B_FALSE,
data);
offset += n;
/*
* When doing dry run, data==NULL is used as a
@ -1028,7 +1034,8 @@ do_dump(dmu_send_cookie_t *dscp, struct send_range *range)
} else {
err = dmu_dump_write(dscp, srdp->obj_type,
range->object, offset,
srdp->datablksz, srdp->datasz, bp, data);
srdp->datablksz, srdp->datasz, bp,
srdp->io_compressed, data);
}
return (err);
}
@ -1081,6 +1088,7 @@ range_alloc(enum type type, uint64_t object, uint64_t start_blkid,
cv_init(&range->sru.data.cv, NULL, CV_DEFAULT, NULL);
range->sru.data.io_outstanding = 0;
range->sru.data.io_err = 0;
range->sru.data.io_compressed = B_FALSE;
}
return (range);
}
@ -1646,10 +1654,13 @@ issue_data_read(struct send_reader_thread_arg *srta, struct send_range *range)
enum zio_flag zioflags = ZIO_FLAG_CANFAIL;
if (srta->featureflags & DMU_BACKUP_FEATURE_RAW)
if (srta->featureflags & DMU_BACKUP_FEATURE_RAW) {
zioflags |= ZIO_FLAG_RAW;
else if (request_compressed)
srdp->io_compressed = B_TRUE;
} else if (request_compressed) {
zioflags |= ZIO_FLAG_RAW_COMPRESS;
srdp->io_compressed = B_TRUE;
}
srdp->datasz = (zioflags & ZIO_FLAG_RAW_COMPRESS) ?
BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp);