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| author | Paul Moore <pmoore@redhat.com> | 2014-06-26 14:33:56 -0400 |
|---|---|---|
| committer | Paul Moore <pmoore@redhat.com> | 2014-06-26 14:33:56 -0400 |
| commit | 615e51fdda6f274e94b1e905fcaf6111e0d9aa20 (patch) | |
| tree | d0ce12f9f5e086c293a7255e3e712d2a42be02b9 /security/selinux/hooks.c | |
| parent | f31e799459659ae88c341aeac16a8a5efb1271d4 (diff) | |
| download | op-kernel-dev-615e51fdda6f274e94b1e905fcaf6111e0d9aa20.zip op-kernel-dev-615e51fdda6f274e94b1e905fcaf6111e0d9aa20.tar.gz | |
selinux: reduce the number of calls to synchronize_net() when flushing caches
When flushing the AVC, such as during a policy load, the various
network caches are also flushed, with each making a call to
synchronize_net() which has shown to be expensive in some cases.
This patch consolidates the network cache flushes into a single AVC
callback which only calls synchronize_net() once for each AVC cache
flush.
Reported-by: Jaejyn Shin <flagon22bass@gmail.com>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 336f0a0..39bc8c9 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -161,6 +161,17 @@ static int selinux_peerlbl_enabled(void) return (selinux_policycap_alwaysnetwork || netlbl_enabled() || selinux_xfrm_enabled()); } +static int selinux_netcache_avc_callback(u32 event) +{ + if (event == AVC_CALLBACK_RESET) { + sel_netif_flush(); + sel_netnode_flush(); + sel_netport_flush(); + synchronize_net(); + } + return 0; +} + /* * initialise the security for the init task */ @@ -5993,6 +6004,9 @@ static __init int selinux_init(void) if (register_security(&selinux_ops)) panic("SELinux: Unable to register with kernel.\n"); + if (avc_add_callback(selinux_netcache_avc_callback, AVC_CALLBACK_RESET)) + panic("SELinux: Unable to register AVC netcache callback\n"); + if (selinux_enforcing) printk(KERN_DEBUG "SELinux: Starting in enforcing mode\n"); else |
