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-rw-r--r--net/sunrpc/clnt.c161
1 files changed, 92 insertions, 69 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 8945307556ec..76739e928d0d 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/kallsyms.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
@@ -58,7 +59,6 @@ static void call_start(struct rpc_task *task);
static void call_reserve(struct rpc_task *task);
static void call_reserveresult(struct rpc_task *task);
static void call_allocate(struct rpc_task *task);
-static void call_encode(struct rpc_task *task);
static void call_decode(struct rpc_task *task);
static void call_bind(struct rpc_task *task);
static void call_bind_status(struct rpc_task *task);
@@ -70,9 +70,9 @@ static void call_refreshresult(struct rpc_task *task);
static void call_timeout(struct rpc_task *task);
static void call_connect(struct rpc_task *task);
static void call_connect_status(struct rpc_task *task);
-static __be32 * call_header(struct rpc_task *task);
-static __be32 * call_verify(struct rpc_task *task);
+static __be32 *rpc_encode_header(struct rpc_task *task);
+static __be32 *rpc_verify_header(struct rpc_task *task);
static int rpc_ping(struct rpc_clnt *clnt, int flags);
static void rpc_register_client(struct rpc_clnt *clnt)
@@ -324,6 +324,8 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
clnt->cl_autobind = 1;
if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
clnt->cl_discrtry = 1;
+ if (!(args->flags & RPC_CLNT_CREATE_QUIET))
+ clnt->cl_chatty = 1;
return clnt;
}
@@ -690,6 +692,21 @@ rpc_restart_call(struct rpc_task *task)
}
EXPORT_SYMBOL_GPL(rpc_restart_call);
+#ifdef RPC_DEBUG
+static const char *rpc_proc_name(const struct rpc_task *task)
+{
+ const struct rpc_procinfo *proc = task->tk_msg.rpc_proc;
+
+ if (proc) {
+ if (proc->p_name)
+ return proc->p_name;
+ else
+ return "NULL";
+ } else
+ return "no proc";
+}
+#endif
+
/*
* 0. Initial state
*
@@ -701,9 +718,9 @@ call_start(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
- dprintk("RPC: %5u call_start %s%d proc %d (%s)\n", task->tk_pid,
+ dprintk("RPC: %5u call_start %s%d proc %s (%s)\n", task->tk_pid,
clnt->cl_protname, clnt->cl_vers,
- task->tk_msg.rpc_proc->p_proc,
+ rpc_proc_name(task),
(RPC_IS_ASYNC(task) ? "async" : "sync"));
/* Increment call count */
@@ -861,7 +878,7 @@ rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
* 3. Encode arguments of an RPC call
*/
static void
-call_encode(struct rpc_task *task)
+rpc_xdr_encode(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
kxdrproc_t encode;
@@ -876,23 +893,19 @@ call_encode(struct rpc_task *task)
(char *)req->rq_buffer + req->rq_callsize,
req->rq_rcvsize);
- /* Encode header and provided arguments */
- encode = task->tk_msg.rpc_proc->p_encode;
- if (!(p = call_header(task))) {
- printk(KERN_INFO "RPC: call_header failed, exit EIO\n");
+ p = rpc_encode_header(task);
+ if (p == NULL) {
+ printk(KERN_INFO "RPC: couldn't encode RPC header, exit EIO\n");
rpc_exit(task, -EIO);
return;
}
+
+ encode = task->tk_msg.rpc_proc->p_encode;
if (encode == NULL)
return;
task->tk_status = rpcauth_wrap_req(task, encode, req, p,
task->tk_msg.rpc_argp);
- if (task->tk_status == -ENOMEM) {
- /* XXX: Is this sane? */
- rpc_delay(task, 3*HZ);
- task->tk_status = -EAGAIN;
- }
}
/*
@@ -929,11 +942,9 @@ call_bind_status(struct rpc_task *task)
}
switch (task->tk_status) {
- case -EAGAIN:
- dprintk("RPC: %5u rpcbind waiting for another request "
- "to finish\n", task->tk_pid);
- /* avoid busy-waiting here -- could be a network outage. */
- rpc_delay(task, 5*HZ);
+ case -ENOMEM:
+ dprintk("RPC: %5u rpcbind out of memory\n", task->tk_pid);
+ rpc_delay(task, HZ >> 2);
goto retry_timeout;
case -EACCES:
dprintk("RPC: %5u remote rpcbind: RPC program/version "
@@ -1046,10 +1057,16 @@ call_transmit(struct rpc_task *task)
/* Encode here so that rpcsec_gss can use correct sequence number. */
if (rpc_task_need_encode(task)) {
BUG_ON(task->tk_rqstp->rq_bytes_sent != 0);
- call_encode(task);
+ rpc_xdr_encode(task);
/* Did the encode result in an error condition? */
- if (task->tk_status != 0)
+ if (task->tk_status != 0) {
+ /* Was the error nonfatal? */
+ if (task->tk_status == -EAGAIN)
+ rpc_delay(task, HZ >> 4);
+ else
+ rpc_exit(task, task->tk_status);
return;
+ }
}
xprt_transmit(task);
if (task->tk_status < 0)
@@ -1132,7 +1149,8 @@ call_status(struct rpc_task *task)
rpc_exit(task, status);
break;
default:
- printk("%s: RPC call returned error %d\n",
+ if (clnt->cl_chatty)
+ printk("%s: RPC call returned error %d\n",
clnt->cl_protname, -status);
rpc_exit(task, status);
}
@@ -1157,7 +1175,8 @@ call_timeout(struct rpc_task *task)
task->tk_timeouts++;
if (RPC_IS_SOFT(task)) {
- printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
+ if (clnt->cl_chatty)
+ printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
clnt->cl_protname, clnt->cl_server);
rpc_exit(task, -EIO);
return;
@@ -1165,7 +1184,8 @@ call_timeout(struct rpc_task *task)
if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) {
task->tk_flags |= RPC_CALL_MAJORSEEN;
- printk(KERN_NOTICE "%s: server %s not responding, still trying\n",
+ if (clnt->cl_chatty)
+ printk(KERN_NOTICE "%s: server %s not responding, still trying\n",
clnt->cl_protname, clnt->cl_server);
}
rpc_force_rebind(clnt);
@@ -1196,8 +1216,9 @@ call_decode(struct rpc_task *task)
task->tk_pid, task->tk_status);
if (task->tk_flags & RPC_CALL_MAJORSEEN) {
- printk(KERN_NOTICE "%s: server %s OK\n",
- clnt->cl_protname, clnt->cl_server);
+ if (clnt->cl_chatty)
+ printk(KERN_NOTICE "%s: server %s OK\n",
+ clnt->cl_protname, clnt->cl_server);
task->tk_flags &= ~RPC_CALL_MAJORSEEN;
}
@@ -1224,8 +1245,7 @@ call_decode(struct rpc_task *task)
goto out_retry;
}
- /* Verify the RPC header */
- p = call_verify(task);
+ p = rpc_verify_header(task);
if (IS_ERR(p)) {
if (p == ERR_PTR(-EAGAIN))
goto out_retry;
@@ -1243,7 +1263,7 @@ call_decode(struct rpc_task *task)
return;
out_retry:
task->tk_status = 0;
- /* Note: call_verify() may have freed the RPC slot */
+ /* Note: rpc_verify_header() may have freed the RPC slot */
if (task->tk_rqstp == req) {
req->rq_received = req->rq_rcv_buf.len = 0;
if (task->tk_client->cl_discrtry)
@@ -1290,11 +1310,8 @@ call_refreshresult(struct rpc_task *task)
return;
}
-/*
- * Call header serialization
- */
static __be32 *
-call_header(struct rpc_task *task)
+rpc_encode_header(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_rqst *req = task->tk_rqstp;
@@ -1314,11 +1331,8 @@ call_header(struct rpc_task *task)
return p;
}
-/*
- * Reply header verification
- */
static __be32 *
-call_verify(struct rpc_task *task)
+rpc_verify_header(struct rpc_task *task)
{
struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0];
int len = task->tk_rqstp->rq_rcv_buf.len >> 2;
@@ -1392,7 +1406,7 @@ call_verify(struct rpc_task *task)
task->tk_action = call_bind;
goto out_retry;
case RPC_AUTH_TOOWEAK:
- printk(KERN_NOTICE "call_verify: server %s requires stronger "
+ printk(KERN_NOTICE "RPC: server %s requires stronger "
"authentication.\n", task->tk_client->cl_server);
break;
default:
@@ -1431,10 +1445,10 @@ call_verify(struct rpc_task *task)
error = -EPROTONOSUPPORT;
goto out_err;
case RPC_PROC_UNAVAIL:
- dprintk("RPC: %5u %s: proc %p unsupported by program %u, "
+ dprintk("RPC: %5u %s: proc %s unsupported by program %u, "
"version %u on server %s\n",
task->tk_pid, __func__,
- task->tk_msg.rpc_proc,
+ rpc_proc_name(task),
task->tk_client->cl_prog,
task->tk_client->cl_vers,
task->tk_client->cl_server);
@@ -1517,44 +1531,53 @@ struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int
EXPORT_SYMBOL_GPL(rpc_call_null);
#ifdef RPC_DEBUG
+static void rpc_show_header(void)
+{
+ printk(KERN_INFO "-pid- flgs status -client- --rqstp- "
+ "-timeout ---ops--\n");
+}
+
+static void rpc_show_task(const struct rpc_clnt *clnt,
+ const struct rpc_task *task)
+{
+ const char *rpc_waitq = "none";
+ char *p, action[KSYM_SYMBOL_LEN];
+
+ if (RPC_IS_QUEUED(task))
+ rpc_waitq = rpc_qname(task->tk_waitqueue);
+
+ /* map tk_action pointer to a function name; then trim off
+ * the "+0x0 [sunrpc]" */
+ sprint_symbol(action, (unsigned long)task->tk_action);
+ p = strchr(action, '+');
+ if (p)
+ *p = '\0';
+
+ printk(KERN_INFO "%5u %04x %6d %8p %8p %8ld %8p %sv%u %s a:%s q:%s\n",
+ task->tk_pid, task->tk_flags, task->tk_status,
+ clnt, task->tk_rqstp, task->tk_timeout, task->tk_ops,
+ clnt->cl_protname, clnt->cl_vers, rpc_proc_name(task),
+ action, rpc_waitq);
+}
+
void rpc_show_tasks(void)
{
struct rpc_clnt *clnt;
- struct rpc_task *t;
+ struct rpc_task *task;
+ int header = 0;
spin_lock(&rpc_client_lock);
- if (list_empty(&all_clients))
- goto out;
- printk("-pid- proc flgs status -client- -prog- --rqstp- -timeout "
- "-rpcwait -action- ---ops--\n");
list_for_each_entry(clnt, &all_clients, cl_clients) {
- if (list_empty(&clnt->cl_tasks))
- continue;
spin_lock(&clnt->cl_lock);
- list_for_each_entry(t, &clnt->cl_tasks, tk_task) {
- const char *rpc_waitq = "none";
- int proc;
-
- if (t->tk_msg.rpc_proc)
- proc = t->tk_msg.rpc_proc->p_proc;
- else
- proc = -1;
-
- if (RPC_IS_QUEUED(t))
- rpc_waitq = rpc_qname(t->tk_waitqueue);
-
- printk("%5u %04d %04x %6d %8p %6d %8p %8ld %8s %8p %8p\n",
- t->tk_pid, proc,
- t->tk_flags, t->tk_status,
- t->tk_client,
- (t->tk_client ? t->tk_client->cl_prog : 0),
- t->tk_rqstp, t->tk_timeout,
- rpc_waitq,
- t->tk_action, t->tk_ops);
+ list_for_each_entry(task, &clnt->cl_tasks, tk_task) {
+ if (!header) {
+ rpc_show_header();
+ header++;
+ }
+ rpc_show_task(clnt, task);
}
spin_unlock(&clnt->cl_lock);
}
-out:
spin_unlock(&rpc_client_lock);
}
#endif
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.