This patch moves the transport independent sk_deferred list to the svc_xprt
structure and updates the svc_deferred_req structure to keep pointers to
svc_xprt's directly. The deferral processing code is also moved out of the
transport dependent recvfrom functions and into the generic svc_recv path.
Signed-off-by: Tom Tucker <[email protected]>
---
include/linux/sunrpc/svc.h | 2 +
include/linux/sunrpc/svc_xprt.h | 2 +
include/linux/sunrpc/svcsock.h | 3 --
net/sunrpc/svc_xprt.c | 1 +
net/sunrpc/svcsock.c | 58 +++++++++++++++++----------------------
5 files changed, 29 insertions(+), 37 deletions(-)
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index cfb2652..40adc9d 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -320,7 +320,7 @@ static inline void svc_free_res_pages(struct svc_rqst *rqstp)
struct svc_deferred_req {
u32 prot; /* protocol (UDP or TCP) */
- struct svc_sock *svsk;
+ struct svc_xprt *xprt;
struct sockaddr_storage addr; /* where reply must go */
size_t addrlen;
union svc_addr_u daddr; /* where reply must come from */
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index dfb1d4d..d93ae27 100644
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -59,6 +59,8 @@ struct svc_xprt {
spinlock_t xpt_lock; /* protects sk_deferred
* and xpt_auth_cache */
void *xpt_auth_cache;/* auth cache */
+ struct list_head xpt_deferred; /* deferred requests that need
+ * to be revisted */
};
int svc_reg_xprt_class(struct svc_xprt_class *);
diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h
index f2ed6a2..96a229e 100644
--- a/include/linux/sunrpc/svcsock.h
+++ b/include/linux/sunrpc/svcsock.h
@@ -20,9 +20,6 @@ struct svc_sock {
struct socket * sk_sock; /* berkeley socket layer */
struct sock * sk_sk; /* INET layer */
- struct list_head sk_deferred; /* deferred requests that need to
- * be revisted */
-
/* We keep the old state_change and data_ready CB's here */
void (*sk_ostate)(struct sock *);
void (*sk_odata)(struct sock *, int bytes);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 79009c2..fdf0d8c 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -115,6 +115,7 @@ void svc_xprt_init(struct svc_xprt_class *xcl, struct svc_xprt *xprt,
xprt->xpt_server = serv;
INIT_LIST_HEAD(&xprt->xpt_list);
INIT_LIST_HEAD(&xprt->xpt_ready);
+ INIT_LIST_HEAD(&xprt->xpt_deferred);
mutex_init(&xprt->xpt_mutex);
spin_lock_init(&xprt->xpt_lock);
}
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index d149f4e..62b5225 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -89,7 +89,7 @@ static void svc_close_xprt(struct svc_xprt *xprt);
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 struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt);
static int svc_deferred_recv(struct svc_rqst *rqstp);
static struct cache_deferred_req *svc_defer(struct cache_req *req);
static struct svc_xprt *
@@ -786,11 +786,6 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
(serv->sv_nrthreads+3) * serv->sv_max_mesg,
(serv->sv_nrthreads+3) * serv->sv_max_mesg);
- if ((rqstp->rq_deferred = svc_deferred_dequeue(svsk))) {
- svc_xprt_received(&svsk->sk_xprt);
- return svc_deferred_recv(rqstp);
- }
-
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
skb = NULL;
err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
@@ -1155,11 +1150,6 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags),
test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
- if ((rqstp->rq_deferred = svc_deferred_dequeue(svsk))) {
- svc_xprt_received(&svsk->sk_xprt);
- return svc_deferred_recv(rqstp);
- }
-
if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags))
/* sndbuf needs to have room for one request
* per thread, otherwise we can stall even when the
@@ -1617,7 +1607,12 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
dprintk("svc: server %p, pool %u, socket %p, inuse=%d\n",
rqstp, pool->sp_id, svsk,
atomic_read(&svsk->sk_xprt.xpt_ref.refcount));
- len = svsk->sk_xprt.xpt_ops->xpo_recvfrom(rqstp);
+ rqstp->rq_deferred = svc_deferred_dequeue(&svsk->sk_xprt);
+ if (rqstp->rq_deferred) {
+ svc_xprt_received(&svsk->sk_xprt);
+ len = svc_deferred_recv(rqstp);
+ } else
+ len = svsk->sk_xprt.xpt_ops->xpo_recvfrom(rqstp);
dprintk("svc: got len=%d\n", len);
}
@@ -1774,7 +1769,6 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
svsk->sk_ostate = inet->sk_state_change;
svsk->sk_odata = inet->sk_data_ready;
svsk->sk_owspace = inet->sk_write_space;
- INIT_LIST_HEAD(&svsk->sk_deferred);
/* Initialize the socket */
if (sock->type == SOCK_DGRAM)
@@ -1992,22 +1986,21 @@ void svc_close_all(struct list_head *xprt_list)
static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
{
struct svc_deferred_req *dr = container_of(dreq, struct svc_deferred_req, handle);
- struct svc_sock *svsk;
+ struct svc_xprt *xprt = dr->xprt;
if (too_many) {
- svc_xprt_put(&dr->svsk->sk_xprt);
+ svc_xprt_put(xprt);
kfree(dr);
return;
}
dprintk("revisit queued\n");
- svsk = dr->svsk;
- dr->svsk = NULL;
- spin_lock(&svsk->sk_xprt.xpt_lock);
- list_add(&dr->handle.recent, &svsk->sk_deferred);
- spin_unlock(&svsk->sk_xprt.xpt_lock);
- set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
- svc_xprt_enqueue(&svsk->sk_xprt);
- svc_xprt_put(&svsk->sk_xprt);
+ dr->xprt = NULL;
+ spin_lock(&xprt->xpt_lock);
+ list_add(&dr->handle.recent, &xprt->xpt_deferred);
+ spin_unlock(&xprt->xpt_lock);
+ set_bit(XPT_DEFERRED, &xprt->xpt_flags);
+ svc_xprt_enqueue(xprt);
+ svc_xprt_put(xprt);
}
static struct cache_deferred_req *
@@ -2038,7 +2031,7 @@ svc_defer(struct cache_req *req)
memcpy(dr->args, rqstp->rq_arg.head[0].iov_base-skip, dr->argslen<<2);
}
svc_xprt_get(rqstp->rq_xprt);
- dr->svsk = rqstp->rq_sock;
+ dr->xprt = rqstp->rq_xprt;
dr->handle.revisit = svc_revisit;
return &dr->handle;
@@ -2064,22 +2057,21 @@ static int svc_deferred_recv(struct svc_rqst *rqstp)
}
-static struct svc_deferred_req *svc_deferred_dequeue(struct svc_sock *svsk)
+static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt)
{
struct svc_deferred_req *dr = NULL;
- if (!test_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags))
+ if (!test_bit(XPT_DEFERRED, &xprt->xpt_flags))
return NULL;
- spin_lock(&svsk->sk_xprt.xpt_lock);
- clear_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
- if (!list_empty(&svsk->sk_deferred)) {
- dr = list_entry(svsk->sk_deferred.next,
+ spin_lock(&xprt->xpt_lock);
+ clear_bit(XPT_DEFERRED, &xprt->xpt_flags);
+ if (!list_empty(&xprt->xpt_deferred)) {
+ dr = list_entry(xprt->xpt_deferred.next,
struct svc_deferred_req,
handle.recent);
list_del_init(&dr->handle.recent);
- set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
+ set_bit(XPT_DEFERRED, &xprt->xpt_flags);
}
- spin_unlock(&svsk->sk_xprt.xpt_lock);
+ spin_unlock(&xprt->xpt_lock);
return dr;
}
-