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-rw-r--r--net/sunrpc/clnt.c8
-rw-r--r--net/sunrpc/pmap_clnt.c158
-rw-r--r--net/sunrpc/xprt.c1
3 files changed, 106 insertions, 61 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 0b8d03d08561..cee504162a3f 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -147,13 +147,10 @@ rpc_new_client(struct rpc_xprt *xprt, char *servname,
clnt->cl_procinfo = version->procs;
clnt->cl_maxproc = version->nrprocs;
clnt->cl_protname = program->name;
- clnt->cl_pmap = &clnt->cl_pmap_default;
clnt->cl_prog = program->number;
clnt->cl_vers = version->number;
- clnt->cl_prot = xprt->prot;
clnt->cl_stats = program->stats;
clnt->cl_metrics = rpc_alloc_iostats(clnt);
- rpc_init_wait_queue(&clnt->cl_pmap_default.pm_bindwait, "bindwait");
if (!xprt_bound(clnt->cl_xprt))
clnt->cl_autobind = 1;
@@ -243,8 +240,6 @@ rpc_clone_client(struct rpc_clnt *clnt)
atomic_set(&new->cl_users, 0);
new->cl_parent = clnt;
atomic_inc(&clnt->cl_count);
- /* Duplicate portmapper */
- rpc_init_wait_queue(&new->cl_pmap_default.pm_bindwait, "bindwait");
/* Turn off autobind on clones */
new->cl_autobind = 0;
new->cl_oneshot = 0;
@@ -254,8 +249,7 @@ rpc_clone_client(struct rpc_clnt *clnt)
rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
if (new->cl_auth)
atomic_inc(&new->cl_auth->au_count);
- new->cl_pmap = &new->cl_pmap_default;
- new->cl_metrics = rpc_alloc_iostats(clnt);
+ new->cl_metrics = rpc_alloc_iostats(clnt);
return new;
out_no_clnt:
printk(KERN_INFO "RPC: out of memory in %s\n", __FUNCTION__);
diff --git a/net/sunrpc/pmap_clnt.c b/net/sunrpc/pmap_clnt.c
index 209ffdfee10b..59d542436ca9 100644
--- a/net/sunrpc/pmap_clnt.c
+++ b/net/sunrpc/pmap_clnt.c
@@ -24,11 +24,57 @@
#define PMAP_UNSET 2
#define PMAP_GETPORT 3
+struct portmap_args {
+ u32 pm_prog;
+ u32 pm_vers;
+ u32 pm_prot;
+ unsigned short pm_port;
+ struct rpc_task * pm_task;
+};
+
static struct rpc_procinfo pmap_procedures[];
static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int, int);
-static void pmap_getport_done(struct rpc_task *);
+static void pmap_getport_done(struct rpc_task *, void *);
static struct rpc_program pmap_program;
-static DEFINE_SPINLOCK(pmap_lock);
+
+static void pmap_getport_prepare(struct rpc_task *task, void *calldata)
+{
+ struct portmap_args *map = calldata;
+ struct rpc_message msg = {
+ .rpc_proc = &pmap_procedures[PMAP_GETPORT],
+ .rpc_argp = map,
+ .rpc_resp = &map->pm_port,
+ };
+
+ rpc_call_setup(task, &msg, 0);
+}
+
+static inline struct portmap_args *pmap_map_alloc(void)
+{
+ return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
+}
+
+static inline void pmap_map_free(struct portmap_args *map)
+{
+ kfree(map);
+}
+
+static void pmap_map_release(void *data)
+{
+ pmap_map_free(data);
+}
+
+static const struct rpc_call_ops pmap_getport_ops = {
+ .rpc_call_prepare = pmap_getport_prepare,
+ .rpc_call_done = pmap_getport_done,
+ .rpc_release = pmap_map_release,
+};
+
+static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt)
+{
+ xprt_clear_binding(xprt);
+ rpc_wake_up(&xprt->binding);
+}
/*
* Obtain the port for a given RPC service on a given host. This one can
@@ -37,67 +83,71 @@ static DEFINE_SPINLOCK(pmap_lock);
void
rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
{
- struct rpc_portmap *map = clnt->cl_pmap;
- struct sockaddr_in *sap = &clnt->cl_xprt->addr;
- struct rpc_message msg = {
- .rpc_proc = &pmap_procedures[PMAP_GETPORT],
- .rpc_argp = map,
- .rpc_resp = &clnt->cl_port,
- .rpc_cred = NULL
- };
+ struct rpc_xprt *xprt = task->tk_xprt;
+ struct sockaddr_in *sap = &xprt->addr;
+ struct portmap_args *map;
struct rpc_clnt *pmap_clnt;
- struct rpc_task *child;
+ struct rpc_task *child;
- dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n",
+ dprintk("RPC: %4d rpc_getport(%s, %u, %u, %d)\n",
task->tk_pid, clnt->cl_server,
- map->pm_prog, map->pm_vers, map->pm_prot);
+ clnt->cl_prog, clnt->cl_vers, xprt->prot);
/* Autobind on cloned rpc clients is discouraged */
BUG_ON(clnt->cl_parent != clnt);
- spin_lock(&pmap_lock);
- if (map->pm_binding) {
- rpc_sleep_on(&map->pm_bindwait, task, NULL, NULL);
- spin_unlock(&pmap_lock);
+ if (xprt_test_and_set_binding(xprt)) {
+ task->tk_status = -EACCES; /* tell caller to check again */
+ rpc_sleep_on(&xprt->binding, task, NULL, NULL);
return;
}
- map->pm_binding = 1;
- spin_unlock(&pmap_lock);
+
+ /* Someone else may have bound if we slept */
+ if (xprt_bound(xprt)) {
+ task->tk_status = 0;
+ goto bailout_nofree;
+ }
+
+ map = pmap_map_alloc();
+ if (!map) {
+ task->tk_status = -ENOMEM;
+ goto bailout_nofree;
+ }
+ map->pm_prog = clnt->cl_prog;
+ map->pm_vers = clnt->cl_vers;
+ map->pm_prot = xprt->prot;
+ map->pm_port = 0;
+ map->pm_task = task;
pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot, 0);
if (IS_ERR(pmap_clnt)) {
task->tk_status = PTR_ERR(pmap_clnt);
goto bailout;
}
- task->tk_status = 0;
- /*
- * Note: rpc_new_child will release client after a failure.
- */
- if (!(child = rpc_new_child(pmap_clnt, task)))
+ child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
+ if (IS_ERR(child)) {
+ task->tk_status = -EIO;
goto bailout;
+ }
+ rpc_release_task(child);
- /* Setup the call info struct */
- rpc_call_setup(child, &msg, 0);
+ rpc_sleep_on(&xprt->binding, task, NULL, NULL);
- /* ... and run the child task */
task->tk_xprt->stat.bind_count++;
- rpc_run_child(task, child, pmap_getport_done);
return;
bailout:
- spin_lock(&pmap_lock);
- map->pm_binding = 0;
- rpc_wake_up(&map->pm_bindwait);
- spin_unlock(&pmap_lock);
- rpc_exit(task, -EIO);
+ pmap_map_free(map);
+bailout_nofree:
+ pmap_wake_portmap_waiters(xprt);
}
#ifdef CONFIG_ROOT_NFS
int
rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
{
- struct rpc_portmap map = {
+ struct portmap_args map = {
.pm_prog = prog,
.pm_vers = vers,
.pm_prot = prot,
@@ -133,32 +183,32 @@ rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
#endif
static void
-pmap_getport_done(struct rpc_task *task)
+pmap_getport_done(struct rpc_task *child, void *data)
{
- struct rpc_clnt *clnt = task->tk_client;
+ struct portmap_args *map = data;
+ struct rpc_task *task = map->pm_task;
struct rpc_xprt *xprt = task->tk_xprt;
- struct rpc_portmap *map = clnt->cl_pmap;
-
- dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n",
- task->tk_pid, task->tk_status, clnt->cl_port);
+ int status = child->tk_status;
- if (task->tk_status < 0) {
- /* Make the calling task exit with an error */
+ if (status < 0) {
+ /* Portmapper not available */
xprt->ops->set_port(xprt, 0);
- task->tk_action = rpc_exit_task;
- } else if (clnt->cl_port == 0) {
- /* Program not registered */
+ task->tk_status = status;
+ } else if (map->pm_port == 0) {
+ /* Requested RPC service wasn't registered */
xprt->ops->set_port(xprt, 0);
- rpc_exit(task, -EACCES);
+ task->tk_status = -EACCES;
} else {
- xprt->ops->set_port(xprt, clnt->cl_port);
+ /* Succeeded */
+ xprt->ops->set_port(xprt, map->pm_port);
xprt_set_bound(xprt);
- clnt->cl_port = htons(clnt->cl_port);
+ task->tk_status = 0;
}
- spin_lock(&pmap_lock);
- map->pm_binding = 0;
- rpc_wake_up(&map->pm_bindwait);
- spin_unlock(&pmap_lock);
+
+ dprintk("RPC: %4d pmap_getport_done(status %d, port %u)\n",
+ child->tk_pid, child->tk_status, map->pm_port);
+
+ pmap_wake_portmap_waiters(xprt);
}
/*
@@ -172,7 +222,7 @@ rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
.sin_family = AF_INET,
.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
};
- struct rpc_portmap map = {
+ struct portmap_args map = {
.pm_prog = prog,
.pm_vers = vers,
.pm_prot = prot,
@@ -239,7 +289,7 @@ pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileg
* XDR encode/decode functions for PMAP
*/
static int
-xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map)
+xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct portmap_args *map)
{
dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n",
map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index e239ef985ef7..b45abd0743cb 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -928,6 +928,7 @@ static struct rpc_xprt *xprt_setup(int proto, struct sockaddr_in *ap, struct rpc
xprt->last_used = jiffies;
xprt->cwnd = RPC_INITCWND;
+ rpc_init_wait_queue(&xprt->binding, "xprt_binding");
rpc_init_wait_queue(&xprt->pending, "xprt_pending");
rpc_init_wait_queue(&xprt->sending, "xprt_sending");
rpc_init_wait_queue(&xprt->resend, "xprt_resend");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 05:11:19 +0000