svc: Add per-transport delete functions
Add transport specific xpo_detach and xpo_free functions. The xpo_detach
function causes the transport to stop delivering data-ready events
and enqueing the transport for I/O.
The xpo_free function frees all resources associated with the particular
transport instance.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index d46abc8..44a729d 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -85,6 +85,8 @@
static int svc_udp_recvfrom(struct svc_rqst *);
static int svc_udp_sendto(struct svc_rqst *);
static void svc_close_socket(struct svc_sock *svsk);
+static void svc_sock_detach(struct svc_xprt *);
+static void svc_sock_free(struct svc_xprt *);
static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk);
static int svc_deferred_recv(struct svc_rqst *rqstp);
@@ -376,16 +378,8 @@
svc_sock_put(struct svc_sock *svsk)
{
if (atomic_dec_and_test(&svsk->sk_inuse)) {
- BUG_ON(! test_bit(SK_DEAD, &svsk->sk_flags));
-
- dprintk("svc: releasing dead socket\n");
- if (svsk->sk_sock->file)
- sockfd_put(svsk->sk_sock);
- else
- sock_release(svsk->sk_sock);
- if (svsk->sk_info_authunix != NULL)
- svcauth_unix_info_release(svsk->sk_info_authunix);
- kfree(svsk);
+ BUG_ON(!test_bit(SK_DEAD, &svsk->sk_flags));
+ svsk->sk_xprt.xpt_ops->xpo_free(&svsk->sk_xprt);
}
}
@@ -903,6 +897,8 @@
.xpo_recvfrom = svc_udp_recvfrom,
.xpo_sendto = svc_udp_sendto,
.xpo_release_rqst = svc_release_skb,
+ .xpo_detach = svc_sock_detach,
+ .xpo_free = svc_sock_free,
};
static struct svc_xprt_class svc_udp_class = {
@@ -1358,6 +1354,8 @@
.xpo_recvfrom = svc_tcp_recvfrom,
.xpo_sendto = svc_tcp_sendto,
.xpo_release_rqst = svc_release_skb,
+ .xpo_detach = svc_sock_detach,
+ .xpo_free = svc_sock_free,
};
static struct svc_xprt_class svc_tcp_class = {
@@ -1815,6 +1813,40 @@
}
/*
+ * Detach the svc_sock from the socket so that no
+ * more callbacks occur.
+ */
+static void svc_sock_detach(struct svc_xprt *xprt)
+{
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+ struct sock *sk = svsk->sk_sk;
+
+ dprintk("svc: svc_sock_detach(%p)\n", svsk);
+
+ /* put back the old socket callbacks */
+ sk->sk_state_change = svsk->sk_ostate;
+ sk->sk_data_ready = svsk->sk_odata;
+ sk->sk_write_space = svsk->sk_owspace;
+}
+
+/*
+ * Free the svc_sock's socket resources and the svc_sock itself.
+ */
+static void svc_sock_free(struct svc_xprt *xprt)
+{
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+ dprintk("svc: svc_sock_free(%p)\n", svsk);
+
+ if (svsk->sk_info_authunix != NULL)
+ svcauth_unix_info_release(svsk->sk_info_authunix);
+ if (svsk->sk_sock->file)
+ sockfd_put(svsk->sk_sock);
+ else
+ sock_release(svsk->sk_sock);
+ kfree(svsk);
+}
+
+/*
* Remove a dead socket
*/
static void
@@ -1828,9 +1860,7 @@
serv = svsk->sk_server;
sk = svsk->sk_sk;
- sk->sk_state_change = svsk->sk_ostate;
- sk->sk_data_ready = svsk->sk_odata;
- sk->sk_write_space = svsk->sk_owspace;
+ svsk->sk_xprt.xpt_ops->xpo_detach(&svsk->sk_xprt);
spin_lock_bh(&serv->sv_lock);