[PATCH 001/001] net: Add tx_queue/rx_queue info to /proc/net/unix

[Ryan Hajdaj]

From: Ryan Hajdaj <rhajdaj@xxxxxxxxx>

Add tx_queue/rx_queue info to /proc/net/unix (unix_seq_show)

Signed-off-by: Ryan Hajdaj <rhajdaj@xxxxxxxxx>
Tested-by: Ryan Hajdaj <rhajdaj@xxxxxxxxx>
---
tx_queue/rx_queue info is useful in systems with multiple processes
using Unix Domain sockets to communicate, as it can be used to check
process health "at a glance".
Unit tested on Unix stream and datagram sockets.
--- linux-3.3-rc1/net/unix/af_unix.c.orig	2012-01-28 20:36:33.000000000 +0000
+++ linux-3.3-rc1/net/unix/af_unix.c	2012-01-28 19:09:18.000000000 +0000
@@ -2286,13 +2286,14 @@ static int unix_seq_show(struct seq_file

 	if (v == SEQ_START_TOKEN)
 		seq_puts(seq, "Num       RefCount Protocol Flags    Type St "
-			 "Inode Path\n");
+			 "tx_queue rx_queue Inode Path\n");
 	else {
 		struct sock *s = v;
 		struct unix_sock *u = unix_sk(s);
 		unix_state_lock(s);

-		seq_printf(seq, "%pK: %08X %08X %08X %04X %02X %5lu",
+		seq_printf(seq,
+			"%pK: %08X %08X %08X %04X %02X %08lX %08lX %5lu",
 			s,
 			atomic_read(&s->sk_refcnt),
 			0,
@@ -2301,6 +2302,8 @@ static int unix_seq_show(struct seq_file
 			s->sk_socket ?
 			(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTED : SS_UNCONNECTED) :
 			(s->sk_state == TCP_ESTABLISHED ? SS_CONNECTING : SS_DISCONNECTING),
+			unix_outq_len(s),
+			(unix_inq_len(s) < 0 ? 0 : unix_inq_len(s)),
 			sock_i_ino(s));

 		if (u->addr) {
--
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