* [PATCH] ipx: implement shutdown()
@ 2014-02-08 23:04 Sabrina Dubroca
2014-02-08 23:17 ` Sabrina Dubroca
0 siblings, 1 reply; 2+ messages in thread
From: Sabrina Dubroca @ 2014-02-08 23:04 UTC (permalink / raw)
To: acme; +Cc: davem, netdev, 00cpxxx, Sabrina Dubroca
IPX doesn't implement shutdown, which poses a problem to some users:
https://bugzilla.kernel.org/show_bug.cgi?id=67841
This patch is heavily based on the shutdown implementation for unix
sockets.
Reported-by: Bruno Jesus <00cpxxx@gmail.com>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
---
net/ipx/af_ipx.c | 30 ++++++++++++++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index 994e28b..1df57ca 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1383,6 +1383,7 @@ static int ipx_release(struct socket *sock)
goto out;
lock_sock(sk);
+ sk->sk_shutdown = SHUTDOWN_MASK;
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_state_change(sk);
@@ -1806,8 +1807,11 @@ static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
- if (!skb)
+ if (!skb) {
+ if (rc == -EAGAIN && (sk->sk_shutdown & RCV_SHUTDOWN))
+ rc = 0;
goto out;
+ }
ipx = ipx_hdr(skb);
copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
@@ -1937,6 +1941,28 @@ static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long
}
#endif
+static int ipx_shutdown(struct socket *sock, int mode)
+{
+ struct sock *sk = sock->sk;
+
+ printk(KERN_INFO "IPX: shutting down %d\n", mode);
+ if (mode < SHUT_RD || mode > SHUT_RDWR)
+ return -EINVAL;
+ /* This maps:
+ * SHUT_RD (0) -> RCV_SHUTDOWN (1)
+ * SHUT_WR (1) -> SEND_SHUTDOWN (2)
+ * SHUT_RDWR (2) -> SHUTDOWN_MASK (3)
+ */
+ ++mode;
+
+ lock_sock(sk);
+ sk->sk_shutdown |= mode;
+ release_sock(sk);
+ sk->sk_state_change(sk);
+ printk(KERN_INFO "IPX: socket shut down\n");
+
+ return 0;
+}
/*
* Socket family declarations
@@ -1963,7 +1989,7 @@ static const struct proto_ops ipx_dgram_ops = {
.compat_ioctl = ipx_compat_ioctl,
#endif
.listen = sock_no_listen,
- .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
+ .shutdown = ipx_shutdown,
.setsockopt = ipx_setsockopt,
.getsockopt = ipx_getsockopt,
.sendmsg = ipx_sendmsg,
--
1.8.5.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ipx: implement shutdown()
2014-02-08 23:04 [PATCH] ipx: implement shutdown() Sabrina Dubroca
@ 2014-02-08 23:17 ` Sabrina Dubroca
0 siblings, 0 replies; 2+ messages in thread
From: Sabrina Dubroca @ 2014-02-08 23:17 UTC (permalink / raw)
To: acme; +Cc: davem, netdev, 00cpxxx
2014-02-09, 00:04:29 +0100, Sabrina Dubroca wrote:
> +static int ipx_shutdown(struct socket *sock, int mode)
> +{
> + struct sock *sk = sock->sk;
> +
> + printk(KERN_INFO "IPX: shutting down %d\n", mode);
> + if (mode < SHUT_RD || mode > SHUT_RDWR)
> + return -EINVAL;
> + /* This maps:
> + * SHUT_RD (0) -> RCV_SHUTDOWN (1)
> + * SHUT_WR (1) -> SEND_SHUTDOWN (2)
> + * SHUT_RDWR (2) -> SHUTDOWN_MASK (3)
> + */
> + ++mode;
> +
> + lock_sock(sk);
> + sk->sk_shutdown |= mode;
> + release_sock(sk);
> + sk->sk_state_change(sk);
> + printk(KERN_INFO "IPX: socket shut down\n");
> +
> + return 0;
> +}
Sorry, I sent the version with the debugging in. I'll resend a clean one.
--
Sabrina
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