static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
struct svc_serv *serv,
- unsigned short port, int flags)
+ const int family,
+ const unsigned short port,
+ int flags)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
struct sockaddr *sap;
size_t len;
- switch (serv->sv_family) {
- case AF_INET:
+ switch (family) {
+ case PF_INET:
sap = (struct sockaddr *)&sin;
len = sizeof(sin);
break;
- case AF_INET6:
+ case PF_INET6:
sap = (struct sockaddr *)&sin6;
len = sizeof(sin6);
break;
return xcl->xcl_ops->xpo_create(serv, sap, len, flags);
}
-int svc_create_xprt(struct svc_serv *serv, char *xprt_name, unsigned short port,
+int svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
+ const int family, const unsigned short port,
int flags)
{
struct svc_xprt_class *xcl;
goto err;
spin_unlock(&svc_xprt_class_lock);
- newxprt = __svc_xpo_create(xcl, serv, port, flags);
+ newxprt = __svc_xpo_create(xcl, serv, family, port, flags);
if (IS_ERR(newxprt)) {
module_put(xcl->xcl_owner);
return PTR_ERR(newxprt);
svc_xprt_enqueue(xprt);
}
}
-EXPORT_SYMBOL(svc_reserve);
+EXPORT_SYMBOL_GPL(svc_reserve);
static void svc_xprt_release(struct svc_rqst *rqstp)
{
rqstp->rq_xprt->xpt_ops->xpo_release_rqst(rqstp);
+ kfree(rqstp->rq_deferred);
+ rqstp->rq_deferred = NULL;
+
svc_free_res_pages(rqstp);
rqstp->rq_res.page_len = 0;
rqstp->rq_res.page_base = 0;
spin_unlock_bh(&pool->sp_lock);
}
}
-EXPORT_SYMBOL(svc_wake_up);
+EXPORT_SYMBOL_GPL(svc_wake_up);
int svc_port_is_privileged(struct sockaddr *sin)
{
}
/*
- * Make sure that we don't have too many active connections. If we
- * have, something must be dropped.
+ * Make sure that we don't have too many active connections. If we have,
+ * something must be dropped. It's not clear what will happen if we allow
+ * "too many" connections, but when dealing with network-facing software,
+ * we have to code defensively. Here we do that by imposing hard limits.
*
* There's no point in trying to do random drop here for DoS
* prevention. The NFS clients does 1 reconnect in 15 seconds. An
* The only somewhat efficient mechanism would be if drop old
* connections from the same IP first. But right now we don't even
* record the client IP in svc_sock.
+ *
+ * single-threaded services that expect a lot of clients will probably
+ * need to set sv_maxconn to override the default value which is based
+ * on the number of threads
*/
static void svc_check_conn_limits(struct svc_serv *serv)
{
- if (serv->sv_tmpcnt > (serv->sv_nrthreads+3)*20) {
+ unsigned int limit = serv->sv_maxconn ? serv->sv_maxconn :
+ (serv->sv_nrthreads+3) * 20;
+
+ if (serv->sv_tmpcnt > limit) {
struct svc_xprt *xprt = NULL;
spin_lock_bh(&serv->sv_lock);
if (!list_empty(&serv->sv_tempsocks)) {
if (net_ratelimit()) {
/* Try to help the admin */
printk(KERN_NOTICE "%s: too many open "
- "connections, consider increasing the "
- "number of nfsd threads\n",
- serv->sv_name);
+ "connections, consider increasing %s\n",
+ serv->sv_name, serv->sv_maxconn ?
+ "the max number of connections." :
+ "the number of threads.");
}
/*
* Always select the oldest connection. It's not fair,
serv->sv_stats->netcnt++;
return len;
}
-EXPORT_SYMBOL(svc_recv);
+EXPORT_SYMBOL_GPL(svc_recv);
/*
* Drop request
dprintk("svc: xprt %p dropped request\n", rqstp->rq_xprt);
svc_xprt_release(rqstp);
}
-EXPORT_SYMBOL(svc_drop);
+EXPORT_SYMBOL_GPL(svc_drop);
/*
* Return reply to client.
void svc_delete_xprt(struct svc_xprt *xprt)
{
struct svc_serv *serv = xprt->xpt_server;
+ struct svc_deferred_req *dr;
+
+ /* Only do this once */
+ if (test_and_set_bit(XPT_DEAD, &xprt->xpt_flags))
+ return;
dprintk("svc: svc_delete_xprt(%p)\n", xprt);
xprt->xpt_ops->xpo_detach(xprt);
* while still attached to a queue, the queue itself
* is about to be destroyed (in svc_destroy).
*/
- if (!test_and_set_bit(XPT_DEAD, &xprt->xpt_flags)) {
- BUG_ON(atomic_read(&xprt->xpt_ref.refcount) < 2);
- if (test_bit(XPT_TEMP, &xprt->xpt_flags))
- serv->sv_tmpcnt--;
+ if (test_bit(XPT_TEMP, &xprt->xpt_flags))
+ serv->sv_tmpcnt--;
+
+ for (dr = svc_deferred_dequeue(xprt); dr;
+ dr = svc_deferred_dequeue(xprt)) {
svc_xprt_put(xprt);
+ kfree(dr);
}
+
+ svc_xprt_put(xprt);
spin_unlock_bh(&serv->sv_lock);
}
container_of(dreq, struct svc_deferred_req, handle);
struct svc_xprt *xprt = dr->xprt;
- if (too_many) {
+ spin_lock(&xprt->xpt_lock);
+ set_bit(XPT_DEFERRED, &xprt->xpt_flags);
+ if (too_many || test_bit(XPT_DEAD, &xprt->xpt_flags)) {
+ spin_unlock(&xprt->xpt_lock);
+ dprintk("revisit canceled\n");
svc_xprt_put(xprt);
kfree(dr);
return;
}
dprintk("revisit queued\n");
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);
}
return dr;
}
-/*
+/**
+ * svc_find_xprt - find an RPC transport instance
+ * @serv: pointer to svc_serv to search
+ * @xcl_name: C string containing transport's class name
+ * @af: Address family of transport's local address
+ * @port: transport's IP port number
+ *
* Return the transport instance pointer for the endpoint accepting
* connections/peer traffic from the specified transport class,
* address family and port.
* wild-card, and will result in matching the first transport in the
* service's list that has a matching class name.
*/
-struct svc_xprt *svc_find_xprt(struct svc_serv *serv, char *xcl_name,
- int af, int port)
+struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
+ const sa_family_t af, const unsigned short port)
{
struct svc_xprt *xprt;
struct svc_xprt *found = NULL;
/* Sanity check the args */
- if (!serv || !xcl_name)
+ if (serv == NULL || xcl_name == NULL)
return found;
spin_lock_bh(&serv->sv_lock);
continue;
if (af != AF_UNSPEC && af != xprt->xpt_local.ss_family)
continue;
- if (port && port != svc_xprt_local_port(xprt))
+ if (port != 0 && port != svc_xprt_local_port(xprt))
continue;
found = xprt;
svc_xprt_get(xprt);
projects / mv-sheeva.git / blobdiff