linux-toradex.git/security/selinux/include/avc.h, branch v3.10.66

SELinux: avc: remove the useless fields in avc_add_callback

2012-04-09T16:23:44+00:00

avc_add_callback now just used for registering reset functions
in initcalls, and the callback functions just did reset operations.
So, reducing the arguments to only one event is enough now.

Signed-off-by: Wanlong Gao 
Signed-off-by: Eric Paris

SELinux: unify the selinux_audit_data and selinux_late_audit_data

2012-04-09T16:23:06+00:00

We no longer need the distinction.  We only need data after we decide to do an
audit.  So turn the "late" audit data into just "data" and remove what we
currently have as "data".

Signed-off-by: Eric Paris

SELinux: remove auditdeny from selinux_audit_data

2012-04-09T16:23:05+00:00

It's just takin' up space.

Signed-off-by: Eric Paris

SELinux: delay initialization of audit data in selinux_inode_permission

2012-04-09T16:22:59+00:00

We pay a rather large overhead initializing the common_audit_data.
Since we only need this information if we actually emit an audit
message there is little need to set it up in the hot path.  This patch
splits the functionality of avc_has_perm() into avc_has_perm_noaudit(),
avc_audit_required() and slow_avc_audit().  But we take care of setting
up to audit between required() and the actual audit call.  Thus saving
measurable time in a hot path.

Signed-off-by: Stephen Smalley 
Signed-off-by: Eric Paris

SELinux: do not allocate stack space for AVC data unless needed

2012-04-03T16:49:41+00:00

Instead of declaring the entire selinux_audit_data on the stack when we
start an operation on declare it on the stack if we are going to use it.
We know it's usefulness at the end of the security decision and can declare
it there.

Signed-off-by: Eric Paris 
Signed-off-by: Linus Torvalds

SELinux: remove avd from selinux_audit_data

2012-04-03T16:49:10+00:00

We do not use it.  Remove it.

Signed-off-by: Eric Paris 
Signed-off-by: Linus Torvalds

LSM: shrink sizeof LSM specific portion of common_audit_data

2012-04-03T16:48:40+00:00

Linus found that the gigantic size of the common audit data caused a big
perf hit on something as simple as running stat() in a loop.  This patch
requires LSMs to declare the LSM specific portion separately rather than
doing it in a union.  Thus each LSM can be responsible for shrinking their
portion and don't have to pay a penalty just because other LSMs have a
bigger space requirement.

Signed-off-by: Eric Paris 
Signed-off-by: Linus Torvalds

Remove all #inclusions of asm/system.h

2012-03-28T17:30:03+00:00

Remove all #inclusions of asm/system.h preparatory to splitting and killing
it.  Performed with the following command:

perl -p -i -e 's!^#\s*include\s*.*\n!!' `grep -Irl '^#\s*include\s*' *`

Signed-off-by: David Howells

selinux: avoid unnecessary avc cache stat hit count

2011-05-20T04:22:53+00:00

There is no point in counting hits - we can calculate it from the number
of lookups and misses.

This makes the avc statistics a bit smaller, and makes the code
generation better too.

Signed-off-by: Linus Torvalds

SELINUX: Make selinux cache VFS RCU walks safe

2011-04-26T01:16:32+00:00

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 
Signed-off-by: Eric Paris 
Signed-off-by: Linus Torvalds