• Trond Myklebust's avatar
    [PATCH] NFS: Fix lookup intent handling · 1d6757fb
    Trond Myklebust authored
    We should never apply a lookup intent to anything other than the last
    path component in an open(), create() or access() call.
    
    Introduce the helper nfs_lookup_check_intent() which always returns
    zero if LOOKUP_CONTINUE or LOOKUP_PARENT are set, and returns the
    intent flags if we're on the last component of the lookup.
    By doing so, we fix a bug in open(O_EXCL), where we may end up
    optimizing away a real lookup of the parent directory.
    
    Problem noticed by Linda Dunaphant <linda.dunaphant@ccur.com>
    Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    1d6757fb
dir.c 40.9 KB