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authorEric Paris <eparis@redhat.com>2011-04-21 17:23:20 -0700
committerEric Paris <eparis@redhat.com>2011-04-25 16:24:41 -0400
commit0dc1ba24f7fff659725eecbba2c9ad679a0954cd (patch)
treead5831b52b38ca8157dd3ba4e5dfb75768bd372f /include/linux/lsm_audit.h
parent1c9904297451f558191e211a48d8838b4bf792b0 (diff)
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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>
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