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VFS: Fix the remaining automounter semantics regressions

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The concensus seems to be that system calls such as stat() etc should
not trigger an automount.  Neither should the l* versions.

This patch therefore adds a LOOKUP_AUTOMOUNT flag to tag those lookups
that _should_ trigger an automount on the last path element.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[ Edited to leave out the cases that are already covered by LOOKUP_OPEN,
  LOOKUP_DIRECTORY and LOOKUP_CREATE - all of which also fundamentally
  force automounting for their own reasons   - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Trond Myklebust
2011-09-26 20:36:09 -04:00
committed by Linus Torvalds
parent d94c177bee
commit 815d405cef
3 changed files with 3 additions and 3 deletions
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2
fs/nfs/super.c
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@@ -2798,7 +2798,7 @@ static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
goto out_put_mnt_ns;
ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt,
export_path, LOOKUP_FOLLOW, &path);
export_path, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path);
nfs_referral_loop_unprotect();
put_mnt_ns(ns_private);