linux/fs/autofs4
Ian Kent 6b6751f7fe autofs: fix lockref lookup
autofs needs to be able to see private data dentry flags for its dentrys
that are being created but not yet hashed and for its dentrys that have
been rmdir()ed but not yet freed.  It needs to do this so it can block
processes in these states until a status has been returned to indicate
the given operation is complete.

It does this by keeping two lists, active and expring, of dentrys in
this state and uses ->d_release() to keep them stable while it checks
the reference count to determine if they should be used.

But with the recent lockref changes dentrys being freed sometimes don't
transition to a reference count of 0 before being freed so autofs can
occassionally use a dentry that is invalid which can lead to a panic.

Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-06 13:04:59 -07:00
..
autofs_i.h autofs4: allow autofs to work outside the initial PID namespace 2014-01-23 16:36:58 -08:00
dev-ioctl.c autofs4: check dev ioctl size before allocating 2014-04-08 16:48:51 -07:00
expire.c autofs: fix symlinks aren't checked for expiry 2014-01-23 16:36:59 -08:00
init.c fs: Limit sys_mount to only request filesystem modules. 2013-03-03 19:36:31 -08:00
inode.c autofs: fix the return value of autofs4_fill_super 2014-01-23 16:36:59 -08:00
Kconfig fs/Kconfig: move autofs, autofs4 out 2009-01-22 13:15:54 +03:00
Makefile autofs4: add miscellaneous device for ioctls 2008-10-16 11:21:39 -07:00
root.c autofs: fix lockref lookup 2014-05-06 13:04:59 -07:00
symlink.c autofs: fix symlinks aren't checked for expiry 2014-01-23 16:36:59 -08:00
waitq.c autofs4: translate pids to the right namespace for the daemon 2014-01-23 16:36:59 -08:00