src/patches/suse-2.6.27.31/patches.fixes/nfs-06-dont-bother-with-check_mnt-in-do_add_mount-on-shrinkable-ones

   1 Git: dd5cae6e9772ecc62fd374f7a8ec10eb51c96c4d
   2 From: Al Viro <viro@zeniv.linux.org.uk>
   3 Subject: Don't bother with check_mnt() in do_add_mount() on shrinkable ones
   4 Date: Tue Apr 7 12:21:18 2009 -0400
   5 Patch-mainline: 2.7.30
   6 References: bnc#490030, bnc#531633
   7
   8 These guys are what we add as submounts; checks for "is that attached in
   9 our namespace" are simply irrelevant for those and counterproductive for
  10 use of private vfsmount trees a-la what NFS folks want.
  11
  12 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
  13 Acked-by: NeilBrown <neilb@suse.de>
  14
  15 ---
  16  fs/namespace.c |    2 +-
  17  1 file changed, 1 insertion(+), 1 deletion(-)
  18
  19 --- linux-2.6.27-SLE11_BRANCH.orig/fs/namespace.c
  20 +++ linux-2.6.27-SLE11_BRANCH/fs/namespace.c
  21 @@ -1658,7 +1658,7 @@ int do_add_mount(struct vfsmount *newmnt
  22                follow_down(&path->mnt, &path->dentry))
  23                 ;
  24         err = -EINVAL;
  25 -       if (!check_mnt(path->mnt))
  26 +       if (!(mnt_flags & MNT_SHRINKABLE) && !check_mnt(path->mnt))
  27                 goto unlock;
  28
  29         /* Refuse the same filesystem on the same mount point */