tree c70bba916168232f530c00858e7e8a0c5bd82b38
parent 4dcd00b18118d174c4b8d838c11f437f0af3c20c
author Ian Kent <raven@themaw.net> 1114963157 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1114963157 -0700

[PATCH] autofs4: tree race fix

For tree mount maps, a call to chdir or chroot, to a directory above the
moint point directories at a certain time during the expire results in the
expire incorrectly thinking the tree is not busy.  This patch adds a check
to see if the filesystem above the tree mount points is busy and also locks
the filesystem during the tree mount expire to prevent the race.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>