otrd., 2021. g. 23. febr., plkst. 17:51 — lietotājs Sebastian Roller
(<sebastian.rol...@gmail.com>) rakstīja:
>
[...]
>
> root@hikitty:~$ install/btrfs-progs-5.9/btrfs check --readonly /dev/sdi1
> Opening filesystem to check...
> checksum verify failed on 99593231630336 found 000000B6 wanted 00000000
> checksum verify failed on 124762809384960 found 000000B6 wanted 00000000
> checksum verify failed on 124762809384960 found 000000B6 wanted 00000000
> checksum verify failed on 124762809384960 found 000000B6 wanted 00000000
> bad tree block 124762809384960, bytenr mismatch, want=124762809384960, have=0
> ERROR: failed to read block groups: Input/output error
> ERROR: cannot open file system
One possible reason could be that extent tree is corrupted. Right now
I'm dealing with such filesystem.
I wrote a patch that allows to read-only mount such filesystem
(assuming there's no other problems).
Currently none of btrfs tools work when extent tree is corrupted, but
for `btrfs check` this patch would allow it to go further. Only for
data recovery this isn't really that useful.
--- a/check/main.c
+++ b/check/main.c
@@ -10197,7 +10197,7 @@ static int cmd_check(const struct cmd_struct
*cmd, int argc, char **argv)
int qgroup_report = 0;
int qgroups_repaired = 0;
int qgroup_verify_ret;
- unsigned ctree_flags = OPEN_CTREE_EXCLUSIVE;
+ unsigned ctree_flags = OPEN_CTREE_EXCLUSIVE |
OPEN_CTREE_NO_BLOCK_GROUPS;
int force = 0;
while(1) {
