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Btrfs: create the uuid tree on remount rw 

Users have been complaining of the uuid tree stuff warning that there is no uuid
root when trying to do snapshot operations.  This is because if you mount -o ro
we will not create the uuid tree.  But then if you mount -o rw,remount we will
still not create it and then any subsequent snapshot/subvol operations you try
to do will fail gloriously.  Fix this by creating the uuid_root on remount rw if
it was not already there.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Josef Bacik 2013-09-20 22:33:20 -04:00 committed by Chris Mason
parent cbf8b8ca3e
commit 94aebfb2e7
1 changed files with 10 additions and 0 deletions
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10
fs/btrfs/super.c
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@ -1383,6 +1383,16 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
pr_warn("btrfs: failed to resume dev_replace\n");
goto restore;
}
if (!fs_info->uuid_root) {
pr_info("btrfs: creating UUID tree\n");
ret = btrfs_create_uuid_tree(fs_info);
if (ret) {
pr_warn("btrfs: failed to create the uuid tree"
"%d\n", ret);
goto restore;
}
}
sb->s_flags &= ~MS_RDONLY;
}
out: