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| author | Marcos Paulo de Souza <mpdesouza@suse.com> | 2020-08-03 16:55:01 -0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-08-19 18:39:12 +0200 |
| commit | 282dd7d7718444679b046b769d872b188818ca35 (patch) | |
| tree | fd9117b53157612779302a662ba1da5283fdda66 /fs | |
| parent | c965d6402f24adcd3d4d0dd9b1f30a0578b6255c (diff) | |
| download | linux-stable-282dd7d7718444679b046b769d872b188818ca35.tar.gz linux-stable-282dd7d7718444679b046b769d872b188818ca35.tar.bz2 linux-stable-282dd7d7718444679b046b769d872b188818ca35.zip | |
btrfs: reset compression level for lzo on remount
Currently a user can set mount "-o compress" which will set the
compression algorithm to zlib, and use the default compress level for
zlib (3):
relatime,compress=zlib:3,space_cache
If the user remounts the fs using "-o compress=lzo", then the old
compress_level is used:
relatime,compress=lzo:3,space_cache
But lzo does not expose any tunable compression level. The same happens
if we set any compress argument with different level, also with zstd.
Fix this by resetting the compress_level when compress=lzo is
specified. With the fix applied, lzo is shown without compress level:
relatime,compress=lzo,space_cache
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index e529ddb35b87..25967ecaaf0a 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -625,6 +625,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, } else if (strncmp(args[0].from, "lzo", 3) == 0) { compress_type = "lzo"; info->compress_type = BTRFS_COMPRESS_LZO; + info->compress_level = 0; btrfs_set_opt(info->mount_opt, COMPRESS); btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATASUM); |