NFS: Switch from intr mount option to TASK_KILLABLE

By using the TASK_KILLABLE infrastructure, we can get rid of the 'intr'
mount option.  We have to use _killable everywhere instead of _interruptible
as we get rid of rpc_clnt_sigmask/sigunmask.

Signed-off-by: Liam R. Howlett <howlett@gmail.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>

4 files changed, 9 insertions, 58 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 76be83ee4b04..a99729ff450e 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -281,7 +281,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
                 return clnt;
 
         if (!(args->flags & RPC_CLNT_CREATE_NOPING)) {
-                int err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
+                int err = rpc_ping(clnt, RPC_TASK_SOFT);
                 if (err != 0) {
                         rpc_shutdown_client(clnt);
                         return ERR_PTR(err);
@@ -292,8 +292,6 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
         if (args->flags & RPC_CLNT_CREATE_HARDRTRY)
                 clnt->cl_softrtry = 0;
 
-        if (args->flags & RPC_CLNT_CREATE_INTR)
-                clnt->cl_intr = 1;
         if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
                 clnt->cl_autobind = 1;
         if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
@@ -459,7 +457,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
         clnt->cl_prog     = program->number;
         clnt->cl_vers     = version->number;
         clnt->cl_stats    = program->stats;
-        err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
+        err = rpc_ping(clnt, RPC_TASK_SOFT);
         if (err != 0) {
                 rpc_shutdown_client(clnt);
                 clnt = ERR_PTR(err);
@@ -480,44 +478,6 @@ static const struct rpc_call_ops rpc_default_ops = {
         .rpc_call_done = rpc_default_callback,
 };
 
-/*
- *      Export the signal mask handling for synchronous code that
- *      sleeps on RPC calls
- */
-#define RPC_INTR_SIGNALS (sigmask(SIGHUP) | sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGTERM))
-
-static void rpc_save_sigmask(sigset_t *oldset, int intr)
-{
-        unsigned long   sigallow = sigmask(SIGKILL);
-        sigset_t sigmask;
-
-        /* Block all signals except those listed in sigallow */
-        if (intr)
-                sigallow |= RPC_INTR_SIGNALS;
-        siginitsetinv(&sigmask, sigallow);
-        sigprocmask(SIG_BLOCK, &sigmask, oldset);
-}
-
-static inline void rpc_task_sigmask(struct rpc_task *task, sigset_t *oldset)
-{
-        rpc_save_sigmask(oldset, !RPC_TASK_UNINTERRUPTIBLE(task));
-}
-
-static inline void rpc_restore_sigmask(sigset_t *oldset)
-{
-        sigprocmask(SIG_SETMASK, oldset, NULL);
-}
-
-void rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset)
-{
-        rpc_save_sigmask(oldset, clnt->cl_intr);
-}
-
-void rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset)
-{
-        rpc_restore_sigmask(oldset);
-}
-
 static
 struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
                 struct rpc_message *msg,
@@ -526,7 +486,6 @@ struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
                 void *data)
 {
         struct rpc_task *task, *ret;
-        sigset_t oldset;
 
         task = rpc_new_task(clnt, flags, ops, data);
         if (task == NULL) {
@@ -535,7 +494,6 @@ struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
         }
 
         /* Mask signals on synchronous RPC calls and RPCSEC_GSS upcalls */
-        rpc_task_sigmask(task, &oldset);
         if (msg != NULL) {
                 rpc_call_setup(task, msg, 0);
                 if (task->tk_status != 0) {
@@ -548,7 +506,6 @@ struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
         rpc_execute(task);
         ret = task;
 out:
-        rpc_restore_sigmask(&oldset);
         return ret;
 }
 
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index a05493aedb68..c35b6e7fc680 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -172,8 +172,7 @@ static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
                 .program        = &rpcb_program,
                 .version        = version,
                 .authflavor     = RPC_AUTH_UNIX,
-                .flags          = (RPC_CLNT_CREATE_NOPING |
-                                   RPC_CLNT_CREATE_INTR),
+                .flags          = RPC_CLNT_CREATE_NOPING,
         };
 
         switch (srvaddr->sa_family) {
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index c98873f39aec..4b22910b4461 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -245,9 +245,9 @@ void rpc_init_wait_queue(struct rpc_wait_queue *queue, const char *qname)
 }
 EXPORT_SYMBOL(rpc_init_wait_queue);
 
-static int rpc_wait_bit_interruptible(void *word)
+static int rpc_wait_bit_killable(void *word)
 {
-        if (signal_pending(current))
+        if (fatal_signal_pending(current))
                 return -ERESTARTSYS;
         schedule();
         return 0;
@@ -299,9 +299,9 @@ static void rpc_mark_complete_task(struct rpc_task *task)
 int __rpc_wait_for_completion_task(struct rpc_task *task, int (*action)(void *))
 {
         if (action == NULL)
-                action = rpc_wait_bit_interruptible;
+                action = rpc_wait_bit_killable;
         return wait_on_bit(&task->tk_runstate, RPC_TASK_ACTIVE,
-                        action, TASK_INTERRUPTIBLE);
+                        action, TASK_KILLABLE);
 }
 EXPORT_SYMBOL(__rpc_wait_for_completion_task);
 
@@ -690,10 +690,9 @@ static void __rpc_execute(struct rpc_task *task)
 
                 /* sync task: sleep here */
                 dprintk("RPC: %5u sync task going to sleep\n", task->tk_pid);
-                /* Note: Caller should be using rpc_clnt_sigmask() */
                 status = out_of_line_wait_on_bit(&task->tk_runstate,
-                                RPC_TASK_QUEUED, rpc_wait_bit_interruptible,
-                                TASK_INTERRUPTIBLE);
+                                RPC_TASK_QUEUED, rpc_wait_bit_killable,
+                                TASK_KILLABLE);
                 if (status == -ERESTARTSYS) {
                         /*
                          * When a sync task receives a signal, it exits with
@@ -837,8 +836,6 @@ void rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt, int flags, cons
                 kref_get(&clnt->cl_kref);
                 if (clnt->cl_softrtry)
                         task->tk_flags |= RPC_TASK_SOFT;
-                if (!clnt->cl_intr)
-                        task->tk_flags |= RPC_TASK_NOINTR;
         }
 
         BUG_ON(task->tk_ops == NULL);
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 33d89e842c85..1fd3aa81938a 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -38,8 +38,6 @@ EXPORT_SYMBOL(rpc_killall_tasks);
 EXPORT_SYMBOL(rpc_call_sync);
 EXPORT_SYMBOL(rpc_call_async);
 EXPORT_SYMBOL(rpc_call_setup);
-EXPORT_SYMBOL(rpc_clnt_sigmask);
-EXPORT_SYMBOL(rpc_clnt_sigunmask);
 EXPORT_SYMBOL(rpc_delay);
 EXPORT_SYMBOL(rpc_restart_call);
 EXPORT_SYMBOL(rpc_setbufsize);