svc: Change svc_sock_received to svc_xprt_received and export it
All fields touched by svc_sock_received are now transport independent.
Change it to use svc_xprt directly. This function is called from
transport dependent code, so export it.
Update the comment to clearly state the rules for calling this function.
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 2016d9c..5fb537e 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -325,19 +325,21 @@
}
/*
- * Having read something from a socket, check whether it
- * needs to be re-enqueued.
- * Note: XPT_DATA only gets cleared when a read-attempt finds
- * no (or insufficient) data.
+ * svc_xprt_received conditionally queues the transport for processing
+ * by another thread. The caller must hold the XPT_BUSY bit and must
+ * not thereafter touch transport data.
+ *
+ * Note: XPT_DATA only gets cleared when a read-attempt finds no (or
+ * insufficient) data.
*/
-static inline void
-svc_sock_received(struct svc_sock *svsk)
+void svc_xprt_received(struct svc_xprt *xprt)
{
- svsk->sk_xprt.xpt_pool = NULL;
- clear_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags);
- svc_xprt_enqueue(&svsk->sk_xprt);
+ BUG_ON(!test_bit(XPT_BUSY, &xprt->xpt_flags));
+ xprt->xpt_pool = NULL;
+ clear_bit(XPT_BUSY, &xprt->xpt_flags);
+ svc_xprt_enqueue(xprt);
}
-
+EXPORT_SYMBOL_GPL(svc_xprt_received);
/**
* svc_reserve - change the space reserved for the reply to a request.
@@ -766,7 +768,7 @@
(serv->sv_nrthreads+3) * serv->sv_max_mesg);
if ((rqstp->rq_deferred = svc_deferred_dequeue(svsk))) {
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return svc_deferred_recv(rqstp);
}
@@ -783,7 +785,7 @@
dprintk("svc: recvfrom returned error %d\n", -err);
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
}
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN;
}
rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
@@ -798,7 +800,7 @@
/*
* Maybe more packets - kick another thread ASAP.
*/
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
len = skb->len - sizeof(struct udphdr);
rqstp->rq_arg.len = len;
@@ -1104,7 +1106,7 @@
}
memcpy(&newsvsk->sk_local, sin, slen);
- svc_sock_received(newsvsk);
+ svc_xprt_received(&newsvsk->sk_xprt);
if (serv->sv_stats)
serv->sv_stats->nettcpconn++;
@@ -1134,7 +1136,7 @@
test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
if ((rqstp->rq_deferred = svc_deferred_dequeue(svsk))) {
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return svc_deferred_recv(rqstp);
}
@@ -1174,7 +1176,7 @@
if (len < want) {
dprintk("svc: short recvfrom while reading record length (%d of %lu)\n",
len, want);
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN; /* record header not complete */
}
@@ -1210,7 +1212,7 @@
if (len < svsk->sk_reclen) {
dprintk("svc: incomplete TCP record (%d of %d)\n",
len, svsk->sk_reclen);
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return -EAGAIN; /* record not complete */
}
len = svsk->sk_reclen;
@@ -1250,7 +1252,7 @@
svsk->sk_reclen = 0;
svsk->sk_tcplen = 0;
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
if (serv->sv_stats)
serv->sv_stats->nettcpcnt++;
@@ -1263,7 +1265,7 @@
error:
if (len == -EAGAIN) {
dprintk("RPC: TCP recvfrom got EAGAIN\n");
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
} else {
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
svsk->sk_xprt.xpt_server->sv_name, -len);
@@ -1590,7 +1592,7 @@
__module_get(newxpt->xpt_class->xcl_owner);
svc_check_conn_limits(svsk->sk_xprt.xpt_server);
}
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
} else {
dprintk("svc: server %p, pool %u, socket %p, inuse=%d\n",
rqstp, pool->sp_id, svsk,
@@ -1809,7 +1811,7 @@
else {
svsk = svc_setup_socket(serv, so, &err, SVC_SOCK_DEFAULTS);
if (svsk) {
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
err = 0;
}
}
@@ -1865,7 +1867,7 @@
}
if ((svsk = svc_setup_socket(serv, sock, &error, flags)) != NULL) {
- svc_sock_received(svsk);
+ svc_xprt_received(&svsk->sk_xprt);
return (struct svc_xprt *)svsk;
}