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svc: Make the enqueue service transport neutral and export it. 

The svc_sock_enqueue function is now transport independent since all of
the fields it touches have been moved to the transport independent svc_xprt
structure. Change the function to use the svc_xprt structure directly
instead of the transport specific svc_sock structure.

Transport specific data-ready handlers need to call this function, so
export it.

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>
This commit is contained in:
Tom Tucker 2007-12-30 21:07:57 -06:00 committed by J. Bruce Fields
parent 7a90e8cc21
commit f6150c3cab
1 changed files with 48 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
net/sunrpc/svcsock.c
View File

@ -5,7 +5,7 @@
*
* The server scheduling algorithm does not always distribute the load
* evenly when servicing a single client. May need to modify the
* svc_sock_enqueue procedure...
* svc_xprt_enqueue procedure...
*
* TCP support is largely untested and may be a little slow. The problem
* is that we currently do two separate recvfrom's, one for the 4-byte
@ -63,7 +63,7 @@
* providing that certain rules are followed:
*
* XPT_CONN, XPT_DATA, can be set or cleared at any time.
* after a set, svc_sock_enqueue must be called.
* after a set, svc_xprt_enqueue must be called.
* after a clear, the socket must be read/accepted
* if this succeeds, it must be set again.
* XPT_CLOSE can set at any time. It is never cleared.
@ -212,22 +212,21 @@ static void svc_release_skb(struct svc_rqst *rqstp)
* processes, wake 'em up.
*
*/
static void
svc_sock_enqueue(struct svc_sock *svsk)
void svc_xprt_enqueue(struct svc_xprt *xprt)
{
struct svc_serv *serv = svsk->sk_xprt.xpt_server;
struct svc_serv *serv = xprt->xpt_server;
struct svc_pool *pool;
struct svc_rqst *rqstp;
int cpu;
if (!(svsk->sk_xprt.xpt_flags &
if (!(xprt->xpt_flags &
((1<<XPT_CONN)|(1<<XPT_DATA)|(1<<XPT_CLOSE)|(1<<XPT_DEFERRED))))
return;
if (test_bit(XPT_DEAD, &svsk->sk_xprt.xpt_flags))
if (test_bit(XPT_DEAD, &xprt->xpt_flags))
return;
cpu = get_cpu();
pool = svc_pool_for_cpu(svsk->sk_xprt.xpt_server, cpu);
pool = svc_pool_for_cpu(xprt->xpt_server, cpu);
put_cpu();
spin_lock_bh(&pool->sp_lock);
@ -235,11 +234,12 @@ svc_sock_enqueue(struct svc_sock *svsk)
if (!list_empty(&pool->sp_threads) &&
!list_empty(&pool->sp_sockets))
printk(KERN_ERR
"svc_sock_enqueue: threads and sockets both waiting??\n");
"svc_xprt_enqueue: "
"threads and transports both waiting??\n");
if (test_bit(XPT_DEAD, &svsk->sk_xprt.xpt_flags)) {
if (test_bit(XPT_DEAD, &xprt->xpt_flags)) {
/* Don't enqueue dead sockets */
dprintk("svc: socket %p is dead, not enqueued\n", svsk->sk_sk);
dprintk("svc: transport %p is dead, not enqueued\n", xprt);
goto out_unlock;
}
@ -248,28 +248,29 @@ svc_sock_enqueue(struct svc_sock *svsk)
* on the idle list. We update XPT_BUSY atomically because
* it also guards against trying to enqueue the svc_sock twice.
*/
if (test_and_set_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)) {
if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags)) {
/* Don't enqueue socket while already enqueued */
dprintk("svc: socket %p busy, not enqueued\n", svsk->sk_sk);
dprintk("svc: transport %p busy, not enqueued\n", xprt);
goto out_unlock;
}
BUG_ON(svsk->sk_xprt.xpt_pool != NULL);
svsk->sk_xprt.xpt_pool = pool;
BUG_ON(xprt->xpt_pool != NULL);
xprt->xpt_pool = pool;
/* Handle pending connection */
if (test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags))
if (test_bit(XPT_CONN, &xprt->xpt_flags))
goto process;
/* Handle close in-progress */
if (test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags))
if (test_bit(XPT_CLOSE, &xprt->xpt_flags))
goto process;
/* Check if we have space to reply to a request */
if (!svsk->sk_xprt.xpt_ops->xpo_has_wspace(&svsk->sk_xprt)) {
if (!xprt->xpt_ops->xpo_has_wspace(xprt)) {
/* Don't enqueue while not enough space for reply */
dprintk("svc: no write space, socket %p not enqueued\n", svsk);
svsk->sk_xprt.xpt_pool = NULL;
clear_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags);
dprintk("svc: no write space, transport %p not enqueued\n",
xprt);
xprt->xpt_pool = NULL;
clear_bit(XPT_BUSY, &xprt->xpt_flags);
goto out_unlock;
}
@ -278,28 +279,29 @@ svc_sock_enqueue(struct svc_sock *svsk)
rqstp = list_entry(pool->sp_threads.next,
struct svc_rqst,
rq_list);
dprintk("svc: socket %p served by daemon %p\n",
svsk->sk_sk, rqstp);
dprintk("svc: transport %p served by daemon %p\n",
xprt, rqstp);
svc_thread_dequeue(pool, rqstp);
if (rqstp->rq_sock)
if (rqstp->rq_xprt)
printk(KERN_ERR
"svc_sock_enqueue: server %p, rq_sock=%p!\n",
rqstp, rqstp->rq_sock);
rqstp->rq_sock = svsk;
svc_xprt_get(&svsk->sk_xprt);
"svc_xprt_enqueue: server %p, rq_xprt=%p!\n",
rqstp, rqstp->rq_xprt);
rqstp->rq_xprt = xprt;
svc_xprt_get(xprt);
rqstp->rq_reserved = serv->sv_max_mesg;
atomic_add(rqstp->rq_reserved, &svsk->sk_xprt.xpt_reserved);
BUG_ON(svsk->sk_xprt.xpt_pool != pool);
atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
BUG_ON(xprt->xpt_pool != pool);
wake_up(&rqstp->rq_wait);
} else {
dprintk("svc: socket %p put into queue\n", svsk->sk_sk);
list_add_tail(&svsk->sk_xprt.xpt_ready, &pool->sp_sockets);
BUG_ON(svsk->sk_xprt.xpt_pool != pool);
dprintk("svc: transport %p put into queue\n", xprt);
list_add_tail(&xprt->xpt_ready, &pool->sp_sockets);
BUG_ON(xprt->xpt_pool != pool);
}
out_unlock:
spin_unlock_bh(&pool->sp_lock);
}
EXPORT_SYMBOL_GPL(svc_xprt_enqueue);
/*
* Dequeue the first socket. Must be called with the pool->sp_lock held.
@ -333,7 +335,7 @@ svc_sock_received(struct svc_sock *svsk)
{
svsk->sk_xprt.xpt_pool = NULL;
clear_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags);
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
}
@ -352,11 +354,11 @@ void svc_reserve(struct svc_rqst *rqstp, int space)
space += rqstp->rq_res.head[0].iov_len;
if (space < rqstp->rq_reserved) {
struct svc_sock *svsk = rqstp->rq_sock;
atomic_sub((rqstp->rq_reserved - space), &svsk->sk_xprt.xpt_reserved);
struct svc_xprt *xprt = rqstp->rq_xprt;
atomic_sub((rqstp->rq_reserved - space), &xprt->xpt_reserved);
rqstp->rq_reserved = space;
svc_sock_enqueue(svsk);
svc_xprt_enqueue(xprt);
}
}
@ -684,7 +686,7 @@ svc_udp_data_ready(struct sock *sk, int count)
svsk, sk, count,
test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags));
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
@ -701,7 +703,7 @@ svc_write_space(struct sock *sk)
if (svsk) {
dprintk("svc: socket %p(inet %p), write_space busy=%d\n",
svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags));
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) {
@ -973,7 +975,7 @@ svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
if (sk->sk_state == TCP_LISTEN) {
if (svsk) {
set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
} else
printk("svc: socket %p: no user data\n", sk);
}
@ -997,7 +999,7 @@ svc_tcp_state_change(struct sock *sk)
printk("svc: socket %p: no user data\n", sk);
else {
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible_all(sk->sk_sleep);
@ -1012,7 +1014,7 @@ svc_tcp_data_ready(struct sock *sk, int count)
sk, sk->sk_user_data);
if (svsk) {
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
@ -1298,7 +1300,7 @@ svc_tcp_sendto(struct svc_rqst *rqstp)
(sent<0)?"got error":"sent only",
sent, xbufp->len);
set_bit(XPT_CLOSE, &rqstp->rq_sock->sk_xprt.xpt_flags);
svc_sock_enqueue(rqstp->rq_sock);
svc_xprt_enqueue(rqstp->rq_xprt);
sent = -EAGAIN;
}
return sent;
@ -1476,7 +1478,7 @@ static void svc_check_conn_limits(struct svc_serv *serv)
spin_unlock_bh(&serv->sv_lock);
if (svsk) {
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
svc_xprt_put(&svsk->sk_xprt);
}
}
@ -1709,7 +1711,7 @@ svc_age_temp_sockets(unsigned long closure)
svsk, get_seconds() - svsk->sk_lastrecv);
/* a thread will dequeue and close it soon */
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
svc_xprt_put(&svsk->sk_xprt);
}
@ -1991,7 +1993,7 @@ static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
list_add(&dr->handle.recent, &svsk->sk_deferred);
spin_unlock(&svsk->sk_lock);
set_bit(XPT_DEFERRED, &svsk->sk_xprt.xpt_flags);
svc_sock_enqueue(svsk);
svc_xprt_enqueue(&svsk->sk_xprt);
svc_xprt_put(&svsk->sk_xprt);
}