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-rw-r--r--include/linux/sunrpc/svc.h1
-rw-r--r--include/linux/sunrpc/svc_xprt.h1
-rw-r--r--net/sunrpc/sunrpc.h13
-rw-r--r--net/sunrpc/svcsock.c5
4 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 04e7632..a0dbbd1 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -254,6 +254,7 @@ struct svc_rqst {
u32 rq_prot; /* IP protocol */
unsigned short
rq_secure : 1; /* secure port */
+ unsigned short rq_local : 1; /* local request */
void * rq_argp; /* decoded arguments */
void * rq_resp; /* xdr'd results */
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index 0cec1b9..7235040 100644
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -64,6 +64,7 @@ struct svc_xprt {
#define XPT_DETACHED 10 /* detached from tempsocks list */
#define XPT_LISTENER 11 /* listening endpoint */
#define XPT_CACHE_AUTH 12 /* cache auth info */
+#define XPT_LOCAL 13 /* connection from loopback interface */
struct svc_serv *xpt_server; /* service for transport */
atomic_t xpt_reserved; /* space on outq that is rsvd */
diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h
index 14c9f6d..f2b7cb5 100644
--- a/net/sunrpc/sunrpc.h
+++ b/net/sunrpc/sunrpc.h
@@ -43,6 +43,19 @@ static inline int rpc_reply_expected(struct rpc_task *task)
(task->tk_msg.rpc_proc->p_decode != NULL);
}
+static inline int sock_is_loopback(struct sock *sk)
+{
+ struct dst_entry *dst;
+ int loopback = 0;
+ rcu_read_lock();
+ dst = rcu_dereference(sk->sk_dst_cache);
+ if (dst && dst->dev &&
+ (dst->dev->features & NETIF_F_LOOPBACK))
+ loopback = 1;
+ rcu_read_unlock();
+ return loopback;
+}
+
int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
struct page *headpage, unsigned long headoffset,
struct page *tailpage, unsigned long tailoffset);
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 0cb34f5..f3b8eb3 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -874,6 +874,10 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
}
svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen);
+ if (sock_is_loopback(newsock->sk))
+ set_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags);
+ else
+ clear_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags);
if (serv->sv_stats)
serv->sv_stats->nettcpconn++;
@@ -1119,6 +1123,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_xprt_ctxt = NULL;
rqstp->rq_prot = IPPROTO_TCP;
+ rqstp->rq_local = !!test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags);
p = (__be32 *)rqstp->rq_arg.head[0].iov_base;
calldir = p[1];
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