linux/fs/autofs4
NeilBrown ef16cc5909 autofs4: d_manage() should return -EISDIR when appropriate in rcu-walk mode.
If rcu-walk mode we don't *have* to return -EISDIR for non-mount-traps
as we will simply drop into REF-walk and handling DCACHE_NEED_AUTOMOUNT
dentrys the slow way.  But it is better if we do when possible.

In 'oz_mode', use the same condition as ref-walk: if not a mountpoint,
then it must be -EISDIR.

In regular mode there are most tests needed.  Most of them can be
performed without taking any spinlocks.  If we find a directory that
isn't obviously empty, and isn't mounted on, we need to call
'simple_empty()' which does take a spinlock.  If this turned out to hurt
performance, some other approach could be found to signal when a
directory is known to be empty.

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Ian Kent <raven@themaw.net>
Tested-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-14 02:18:16 +02:00
..
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
autofs_i.h autofs4: avoid taking fs_lock during rcu-walk 2014-10-14 02:18:16 +02:00
dev-ioctl.c autofs4: allow RCU-walk to walk through autofs4 2014-10-14 02:18:16 +02:00
expire.c autofs4: avoid taking fs_lock during rcu-walk 2014-10-14 02:18:16 +02:00
init.c fs: Limit sys_mount to only request filesystem modules. 2013-03-03 19:36:31 -08:00
inode.c autofs4: fix false positive compile error 2014-07-03 09:21:53 -07:00
root.c autofs4: d_manage() should return -EISDIR when appropriate in rcu-walk mode. 2014-10-14 02:18:16 +02:00
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