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LSM: shrink the common_audit_data data union

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After shrinking the common_audit_data stack usage for private LSM data I'm
not going to shrink the data union.  To do this I'm going to move anything
larger than 2 void * ptrs to it's own structure and require it to be declared
separately on the calling stack.  Thus hot paths which don't need more than
a couple pointer don't have to declare space to hold large unneeded
structures.  I could get this down to one void * by dealing with the key
struct and the struct path.  We'll see if that is helpful after taking care of
networking.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric Paris
2012-04-02 13:15:44 -04:00
committed by Linus Torvalds
parent 3b3b0e4fc1
commit 48c62af68a
5 changed files with 140 additions and 105 deletions
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35
include/linux/lsm_audit.h
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@@ -22,6 +22,23 @@
#include <linux/key.h>
#include <linux/skbuff.h>
struct lsm_network_audit {
int netif;
struct sock *sk;
u16 family;
__be16 dport;
__be16 sport;
union {
struct {
__be32 daddr;
__be32 saddr;
} v4;
struct {
struct in6_addr daddr;
struct in6_addr saddr;
} v6;
} fam;
};
/* Auxiliary data to use in generating the audit record. */
struct common_audit_data {
@@ -41,23 +58,7 @@ struct common_audit_data {
struct path path;
struct dentry *dentry;
struct inode *inode;
struct {
int netif;
struct sock *sk;
u16 family;
__be16 dport;
__be16 sport;
union {
struct {
__be32 daddr;
__be32 saddr;
} v4;
struct {
struct in6_addr daddr;
struct in6_addr saddr;
} v6;
} fam;
} net;
struct lsm_network_audit *net;
int cap;
int ipc_id;
struct task_struct *tsk;