From 4849f01d153be0f52b8191ee1be0ce492aa96811 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 14 Dec 2009 19:18:38 +0000 Subject: [PATCH] Btrfs: make subvolid=0 mount the original default root Since theres not a good way to make sure the user sees the original default root tree id, and not to mention it's 5 so is way different than any other volume, just make subvol=0 mount the original default root. This makes it a bit easier for users to handle in the long run. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/super.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index f878337cee6f..9771eb8694b6 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -325,9 +325,15 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags, break; case Opt_subvolid: intarg = 0; - match_int(&args[0], &intarg); - if (intarg) - *subvol_objectid = intarg; + error = match_int(&args[0], &intarg); + if (!error) { + /* we want the original fs_tree */ + if (!intarg) + *subvol_objectid = + BTRFS_FS_TREE_OBJECTID; + else + *subvol_objectid = intarg; + } break; case Opt_device: error = btrfs_scan_one_device(match_strdup(&args[0]),