audit: rename the queues and kauditd related functions

The audit queue names can be shortened and the record sending
helpers associated with the kauditd task could be named better, do
these small cleanups now to make life easier once we start reworking
the queues and kauditd code.
Signed-off-by: Paul Moore <paul@paul-moore.com>

kernel/audit.c

@@ -138,9 +138,9 @@ static DEFINE_SPINLOCK(audit_freelist_lock);
 static int	   audit_freelist_count;
 static LIST_HEAD(audit_freelist);
 
-static struct sk_buff_head audit_skb_queue;
+static struct sk_buff_head audit_queue;
 /* queue of skbs to send to auditd when/if it comes back */
-static struct sk_buff_head audit_skb_hold_queue;
+static struct sk_buff_head audit_hold_queue;
 static struct task_struct *kauditd_task;
 static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait);
 static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait);
@@ -377,8 +377,8 @@ static void audit_hold_skb(struct sk_buff *skb)
 {
 	if (audit_default &&
 	    (!audit_backlog_limit ||
-	     skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit))
-		skb_queue_tail(&audit_skb_hold_queue, skb);
+	     skb_queue_len(&audit_hold_queue) < audit_backlog_limit))
+		skb_queue_tail(&audit_hold_queue, skb);
 	else
 		kfree_skb(skb);
 }
@@ -387,7 +387,7 @@ static void audit_hold_skb(struct sk_buff *skb)
  * For one reason or another this nlh isn't getting delivered to the userspace
  * audit daemon, just send it to printk.
  */
-static void audit_printk_skb(struct sk_buff *skb)
+static void kauditd_printk_skb(struct sk_buff *skb)
 {
 	struct nlmsghdr *nlh = nlmsg_hdr(skb);
 	char *data = nlmsg_data(nlh);
@@ -402,7 +402,7 @@ static void audit_printk_skb(struct sk_buff *skb)
 	audit_hold_skb(skb);
 }
 
-static void kauditd_send_skb(struct sk_buff *skb)
+static void kauditd_send_unicast_skb(struct sk_buff *skb)
 {
 	int err;
 	int attempts = 0;
@@ -493,13 +493,13 @@ static void flush_hold_queue(void)
 	if (!audit_default || !audit_pid)
 		return;
 
-	skb = skb_dequeue(&audit_skb_hold_queue);
+	skb = skb_dequeue(&audit_hold_queue);
 	if (likely(!skb))
 		return;
 
 	while (skb && audit_pid) {
-		kauditd_send_skb(skb);
-		skb = skb_dequeue(&audit_skb_hold_queue);
+		kauditd_send_unicast_skb(skb);
+		skb = skb_dequeue(&audit_hold_queue);
 	}
 
 	/*
@@ -518,7 +518,7 @@ static int kauditd_thread(void *dummy)
 	while (!kthread_should_stop()) {
 		flush_hold_queue();
 
-		skb = skb_dequeue(&audit_skb_queue);
+		skb = skb_dequeue(&audit_queue);
 		if (skb) {
 			nlh = nlmsg_hdr(skb);
 
@@ -540,16 +540,16 @@ static int kauditd_thread(void *dummy)
 			}
 
 			if (audit_pid)
-				kauditd_send_skb(skb);
+				kauditd_send_unicast_skb(skb);
 			else
-				audit_printk_skb(skb);
+				kauditd_printk_skb(skb);
 		} else {
 			/* we have flushed the backlog so wake everyone up who
 			 * is blocked and go to sleep until we have something
 			 * in the backlog again */
 			wake_up(&audit_backlog_wait);
 			wait_event_freezable(kauditd_wait,
-					     skb_queue_len(&audit_skb_queue));
+					     skb_queue_len(&audit_queue));
 		}
 	}
 	return 0;
@@ -865,7 +865,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		s.rate_limit		= audit_rate_limit;
 		s.backlog_limit		= audit_backlog_limit;
 		s.lost			= atomic_read(&audit_lost);
-		s.backlog		= skb_queue_len(&audit_skb_queue);
+		s.backlog		= skb_queue_len(&audit_queue);
 		s.feature_bitmap	= AUDIT_FEATURE_BITMAP_ALL;
 		s.backlog_wait_time	= audit_backlog_wait_time_master;
 		audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &s, sizeof(s));
@@ -1200,8 +1200,8 @@ static int __init audit_init(void)
 		audit_default ? "enabled" : "disabled");
 	register_pernet_subsys(&audit_net_ops);
 
-	skb_queue_head_init(&audit_skb_queue);
-	skb_queue_head_init(&audit_skb_hold_queue);
+	skb_queue_head_init(&audit_queue);
+	skb_queue_head_init(&audit_hold_queue);
 	audit_initialized = AUDIT_INITIALIZED;
 	audit_enabled = audit_default;
 	audit_ever_enabled |= !!audit_default;
@@ -1357,7 +1357,7 @@ static long wait_for_auditd(long sleep_time)
 	DECLARE_WAITQUEUE(wait, current);
 
 	if (audit_backlog_limit &&
-	    skb_queue_len(&audit_skb_queue) > audit_backlog_limit) {
+	    skb_queue_len(&audit_queue) > audit_backlog_limit) {
 		add_wait_queue_exclusive(&audit_backlog_wait, &wait);
 		set_current_state(TASK_UNINTERRUPTIBLE);
 		sleep_time = schedule_timeout(sleep_time);
@@ -1406,7 +1406,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 	}
 
 	while (audit_backlog_limit
-	       && skb_queue_len(&audit_skb_queue) > audit_backlog_limit + reserve) {
+	       && skb_queue_len(&audit_queue) > audit_backlog_limit + reserve) {
 		if (gfp_mask & __GFP_DIRECT_RECLAIM && audit_backlog_wait_time) {
 			long sleep_time;
 
@@ -1419,7 +1419,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 		}
 		if (audit_rate_check() && printk_ratelimit())
 			pr_warn("audit_backlog=%d > audit_backlog_limit=%d\n",
-				skb_queue_len(&audit_skb_queue),
+				skb_queue_len(&audit_queue),
 				audit_backlog_limit);
 		audit_log_lost("backlog limit exceeded");
 		audit_backlog_wait_time = 0;
@@ -2001,7 +2001,7 @@ void audit_log_end(struct audit_buffer *ab)
 	if (!audit_rate_check()) {
 		audit_log_lost("rate limit exceeded");
 	} else {
-		skb_queue_tail(&audit_skb_queue, ab->skb);
+		skb_queue_tail(&audit_queue, ab->skb);
 		wake_up_interruptible(&kauditd_wait);
 		ab->skb = NULL;
 	}