Brian Behlendorf ad8b9f940c Scrub mirror children without BPs ... When scrubbing a raidz/draid pool, which contains a replacing or sparing mirror with multiple online children, only one child will be read. This is not normally a serious concern because the DTL records are used to determine where a good copy of the data is. As long as the data can be read from one child the mirror vdev will use it to repair gaps in any of its children. Furthermore, even if the data which was read is corrupt the raidz code will detect this and issue its own repair I/O to correct the damage in the mirror vdev. However, in the scenario where the DTL is wrong due to silent data corruption (say due to overwriting one child) and the scrub happens to read from a child with good data, then the other damaged mirror child will not be detected nor repaired. While this is possible for both raidz and draid vdevs, it's most pronounced when using draid. This is because by default the zed will sequentially rebuild a draid pool to a distributed spare, and the distributed spare half of the mirror is always preferred since it delivers better performance. This means the damaged half of the mirror will go undetected even after scrubbing. For system administrations this behavior is non-intuitive and in a worst case scenario could result in the only good copy of the data being unknowingly detached from the mirror. This change resolves the issue by reading all replacing/sparing mirror children when scrubbing. When the BP isn't available for verification, then compare the data buffers from each child. They must all be identical, if not there's silent damage and an error is returned to prompt the top-level vdev to issue a repair I/O to rewrite the data on all of the mirror children. Since we can't tell which child was wrong a checksum error is logged against the replacing or sparing mirror vdev. Reviewed-by: Mark Maybee <mark.maybee@delphix.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #13555		2022-06-23 10:36:28 -07:00
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acl	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
alloc_class	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
append	Adding ZTS test for O_APPEND	2022-05-11 08:38:16 -07:00
arc	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
atime	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
bootfs	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
btree	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
cache	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
cachefile	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
casenorm	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
channel_program	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
chattr	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
checksum	Introduce BLAKE3 checksums as an OpenZFS feature	2022-06-08 15:55:57 -07:00
clean_mirror	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
cli_root	Introduce BLAKE3 checksums as an OpenZFS feature	2022-06-08 15:55:57 -07:00
cli_user	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
compression	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
cp_files	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
crtime	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
ctime	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
deadman	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
delegate	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
devices	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
dos_attributes	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
events	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
exec	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
fallocate	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
fault	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
features	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
grow	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
history	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
hkdf	autoconf: use include directives instead of recursing down tests (mostly)	2022-05-10 10:20:09 -07:00
inheritance	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
inuse	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
io	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
l2arc	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
large_files	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
largest_pool	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
libzfs	tests: many_fds: simplify, modernise	2022-05-11 10:33:12 -07:00
limits	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
link_count	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
log_spacemap	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
migration	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
mmap	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
mmp	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
mount	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
mv_files	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
nestedfs	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
no_space	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
nopwrite	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
online_offline	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
pam	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
pool_checkpoint	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
pool_names	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
poolversion	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
privilege	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
procfs	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
projectquota	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
pyzfs	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
quota	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
raidz	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
redacted_send	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
redundancy	Scrub mirror children without BPs	2022-06-23 10:36:28 -07:00
refquota	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
refreserv	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
removal	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
rename_dirs	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
replacement	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
reservation	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
rootpool	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
rsend	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
scrub_mirror	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
simd	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
slog	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
snapshot	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
snapused	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
sparse	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
stat	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
suid	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
tmpfile	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
trim	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
truncate	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
upgrade	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
user_namespace	Add Linux namespace delegation support	2022-06-10 09:51:46 -07:00
userquota	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
vdev_zaps	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
write_dirs	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
xattr	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
zpool_influxdb	autoconf: use include directives instead of recursing down test data	2022-05-10 10:20:19 -07:00
zvol	zvol: Support blk-mq for better performance	2022-06-09 08:10:38 -06:00