linux/security/selinux
Eric Paris 9ade0cf440 SELINUX: Make selinux cache VFS RCU walks safe
Now that the security modules can decide whether they support the
dcache RCU walk or not it's possible to make selinux a bit more
RCU friendly.  The SELinux AVC and security server access decision
code is RCU safe.  A specific piece of the LSM audit code may not
be RCU safe.

This patch makes the VFS RCU walk retry if it would hit the non RCU
safe chunk of code.  It will normally just work under RCU.  This is
done simply by passing the VFS RCU state as a flag down into the
avc_audit() code and returning ECHILD there if it would have an issue.

Based-on-patch-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-25 18:16:32 -07:00
..
include SELINUX: Make selinux cache VFS RCU walks safe 2011-04-25 18:16:32 -07:00
ss Fix common misspellings 2011-03-31 11:26:23 -03:00
.gitignore SELinux: add .gitignore files for dynamic classes 2009-10-24 09:42:27 +08:00
avc.c SELINUX: Make selinux cache VFS RCU walks safe 2011-04-25 18:16:32 -07:00
exports.c secmark: make secmark object handling generic 2010-10-21 10:12:48 +11:00
hooks.c SELINUX: Make selinux cache VFS RCU walks safe 2011-04-25 18:16:32 -07:00
Kconfig selinux: Deprecate and schedule the removal of the the compat_net functionality 2008-12-31 12:54:11 -05:00
Makefile selinux: change to new flag variable 2010-10-21 10:12:40 +11:00
netif.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
netlabel.c Fix common misspellings 2011-03-31 11:26:23 -03:00
netlink.c Merge branch 'master' into next 2010-05-06 10:56:07 +10:00
netnode.c selinux: remove all rcu head initializations 2010-08-02 15:33:35 +10:00
netport.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
nlmsgtab.c SELinux: define permissions for DCB netlink messages 2010-12-16 12:50:17 -05:00
selinuxfs.c Merge branch 'master' of git://git.infradead.org/users/eparis/selinux into next 2011-01-10 10:40:42 +11:00
xfrm.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-03-16 16:29:25 -07:00