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AUDIT: Speed up audit_filter_syscall() for the non-auditable case.

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It was showing up fairly high on profiles even when no rules were set.
Make sure the common path stays as fast as possible.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse 2005-08-17 14:49:57 +01:00
parent 413a1c7520
commit c389649594
1 changed files with 12 additions and 10 deletions
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22
kernel/auditsc.c
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@ -513,20 +513,23 @@ static enum audit_state audit_filter_syscall(struct task_struct *tsk,
struct list_head *list)
{
struct audit_entry *e;
enum audit_state state;
int word = AUDIT_WORD(ctx->major);
int bit = AUDIT_BIT(ctx->major);
enum audit_state state;
if (audit_pid && tsk->tgid == audit_pid)
return AUDIT_DISABLED;
rcu_read_lock();
list_for_each_entry_rcu(e, list, list) {
if ((e->rule.mask[word] & bit) == bit
&& audit_filter_rules(tsk, &e->rule, ctx, &state)) {
rcu_read_unlock();
return state;
}
if (!list_empty(list)) {
int word = AUDIT_WORD(ctx->major);
int bit = AUDIT_BIT(ctx->major);
list_for_each_entry_rcu(e, list, list) {
if ((e->rule.mask[word] & bit) == bit
&& audit_filter_rules(tsk, &e->rule, ctx, &state)) {
rcu_read_unlock();
return state;
}
}
}
rcu_read_unlock();
return AUDIT_BUILD_CONTEXT;
@ -1023,7 +1026,6 @@ void audit_syscall_exit(struct task_struct *tsk, int valid, long return_code)
} else {
audit_free_names(context);
audit_free_aux(context);
audit_zero_context(context, context->state);
tsk->audit_context = context;
}
out: