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| author | David Sterba <dsterba@suse.com> | 2020-02-05 19:12:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 18:35:53 +0300 |
| commit | 13b91b8b704340c2ffd1a926a16c63091660ed3d (patch) | |
| tree | f76da52cacf2a9e33cc7b0c4e31258ce13eeadea /fs | |
| parent | 893bb1890fb956ab960aec89ef51f1422b0a4405 (diff) | |
| download | linux-13b91b8b704340c2ffd1a926a16c63091660ed3d.tar.xz | |
btrfs: log message when rw remount is attempted with unclean tree-log
commit 10a3a3edc5b89a8cd095bc63495fb1e0f42047d9 upstream.
A remount to a read-write filesystem is not safe when there's tree-log
to be replayed. Files that could be opened until now might be affected
by the changes in the tree-log.
A regular mount is needed to replay the log so the filesystem presents
the consistent view with the pending changes included.
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/super.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 3ab79fa00dc7..17a8463ef35c 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1801,6 +1801,8 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) } if (btrfs_super_log_root(fs_info->super_copy) != 0) { + btrfs_warn(fs_info, + "mount required to replay tree-log, cannot remount read-write"); ret = -EINVAL; goto restore; } |