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H A D | super.c | ba5b8958 Mon Jul 25 14:40:35 CDT 2011 Josef Bacik <josef@redhat.com> Btrfs: use d_obtain_alias when mounting subvol/subvolid
Currently what we do is just wrong. We either
1) Alloc a new "root" dentry with sb->s_root as it's parent which is just wrong as we could walk into this subvol later on via another path and hilarity could ensue. Also we don't check the return value of d_splice_alias which isn't good either.
or
2) Do a d_find_alias() which we could have lost our dentry from cache at this point and found nothing.
So use d_obtain_alias(). In the case that we already have the inode/dentry in cache we will get the correct dentry. If not we will get a disconnected dentry tree so if we walk into it later on everything will be connected up properly. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
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