/*
- * linux/net/sunrpc/rpcclnt.c
+ * linux/net/sunrpc/clnt.c
*
* This file contains the high-level RPC interface.
* It is modeled as a finite state machine to support both synchronous
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/slab.h>
-#include <linux/in.h>
#include <linux/utsname.h>
+#include <linux/workqueue.h>
#include <linux/sunrpc/clnt.h>
-#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
-
-#include <linux/nfs.h>
+#include <linux/sunrpc/metrics.h>
#define RPC_SLACK_SPACE (1024) /* total overkill */
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);
static void call_transmit(struct rpc_task *task);
static void call_status(struct rpc_task *task);
+static void call_transmit_status(struct rpc_task *task);
static void call_refresh(struct rpc_task *task);
static void call_refreshresult(struct rpc_task *task);
static void call_timeout(struct rpc_task *task);
static uint32_t clntid;
int error;
+ clnt->cl_vfsmnt = ERR_PTR(-ENOENT);
+ clnt->cl_dentry = ERR_PTR(-ENOENT);
if (dir_name == NULL)
return 0;
+
+ clnt->cl_vfsmnt = rpc_get_mount();
+ if (IS_ERR(clnt->cl_vfsmnt))
+ return PTR_ERR(clnt->cl_vfsmnt);
+
for (;;) {
snprintf(clnt->cl_pathname, sizeof(clnt->cl_pathname),
"%s/clnt%x", dir_name,
if (error != -EEXIST) {
printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n",
clnt->cl_pathname, error);
+ rpc_put_mount();
return error;
}
}
* made to sleep too long.
*/
struct rpc_clnt *
-rpc_create_client(struct rpc_xprt *xprt, char *servname,
+rpc_new_client(struct rpc_xprt *xprt, char *servname,
struct rpc_program *program, u32 vers,
rpc_authflavor_t flavor)
{
struct rpc_version *version;
struct rpc_clnt *clnt = NULL;
+ struct rpc_auth *auth;
int err;
int len;
err = -EINVAL;
if (!xprt)
- goto out_err;
+ goto out_no_xprt;
if (vers >= program->nrvers || !(version = program->version[vers]))
goto out_err;
err = -ENOMEM;
- clnt = (struct rpc_clnt *) kmalloc(sizeof(*clnt), GFP_KERNEL);
+ clnt = kmalloc(sizeof(*clnt), GFP_KERNEL);
if (!clnt)
goto out_err;
memset(clnt, 0, sizeof(*clnt));
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 (!clnt->cl_port)
if (err < 0)
goto out_no_path;
- err = -ENOMEM;
- if (!rpcauth_create(flavor, clnt)) {
+ auth = rpcauth_create(flavor, clnt);
+ if (IS_ERR(auth)) {
printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n",
flavor);
+ err = PTR_ERR(auth);
goto out_no_auth;
}
return clnt;
out_no_auth:
- rpc_rmdir(clnt->cl_pathname);
+ if (!IS_ERR(clnt->cl_dentry)) {
+ rpc_rmdir(clnt->cl_pathname);
+ dput(clnt->cl_dentry);
+ rpc_put_mount();
+ }
out_no_path:
if (clnt->cl_server != clnt->cl_inline_name)
kfree(clnt->cl_server);
kfree(clnt);
out_err:
+ xprt_destroy(xprt);
+out_no_xprt:
+ return ERR_PTR(err);
+}
+
+/**
+ * Create an RPC client
+ * @xprt - pointer to xprt struct
+ * @servname - name of server
+ * @info - rpc_program
+ * @version - rpc_program version
+ * @authflavor - rpc_auth flavour to use
+ *
+ * Creates an RPC client structure, then pings the server in order to
+ * determine if it is up, and if it supports this program and version.
+ *
+ * This function should never be called by asynchronous tasks such as
+ * the portmapper.
+ */
+struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
+ struct rpc_program *info, u32 version, rpc_authflavor_t authflavor)
+{
+ struct rpc_clnt *clnt;
+ int err;
+
+ clnt = rpc_new_client(xprt, servname, info, version, authflavor);
+ if (IS_ERR(clnt))
+ return clnt;
+ err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
+ if (err == 0)
+ return clnt;
+ rpc_shutdown_client(clnt);
return ERR_PTR(err);
}
{
struct rpc_clnt *new;
- new = (struct rpc_clnt *)kmalloc(sizeof(*new), GFP_KERNEL);
+ new = kmalloc(sizeof(*new), GFP_KERNEL);
if (!new)
goto out_no_clnt;
memcpy(new, clnt, sizeof(*new));
new->cl_autobind = 0;
new->cl_oneshot = 0;
new->cl_dead = 0;
+ if (!IS_ERR(new->cl_dentry)) {
+ dget(new->cl_dentry);
+ rpc_get_mount();
+ }
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);
return new;
out_no_clnt:
printk(KERN_INFO "RPC: out of memory in %s\n", __FUNCTION__);
clnt->cl_oneshot = 0;
clnt->cl_dead = 0;
rpc_killall_tasks(clnt);
- sleep_on_timeout(&destroy_wait, 1*HZ);
+ wait_event_timeout(destroy_wait,
+ !atomic_read(&clnt->cl_users), 1*HZ);
}
if (atomic_read(&clnt->cl_users) < 0) {
if (clnt->cl_server != clnt->cl_inline_name)
kfree(clnt->cl_server);
out_free:
+ rpc_free_iostats(clnt->cl_metrics);
+ clnt->cl_metrics = NULL;
+ if (!IS_ERR(clnt->cl_dentry)) {
+ dput(clnt->cl_dentry);
+ rpc_put_mount();
+ }
kfree(clnt);
return 0;
}
rpc_destroy_client(clnt);
}
+/**
+ * rpc_bind_new_program - bind a new RPC program to an existing client
+ * @old - old rpc_client
+ * @program - rpc program to set
+ * @vers - rpc program version
+ *
+ * Clones the rpc client and sets up a new RPC program. This is mainly
+ * of use for enabling different RPC programs to share the same transport.
+ * The Sun NFSv2/v3 ACL protocol can do this.
+ */
+struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
+ struct rpc_program *program,
+ int vers)
+{
+ struct rpc_clnt *clnt;
+ struct rpc_version *version;
+ int err;
+
+ BUG_ON(vers >= program->nrvers || !program->version[vers]);
+ version = program->version[vers];
+ clnt = rpc_clone_client(old);
+ if (IS_ERR(clnt))
+ goto out;
+ clnt->cl_procinfo = version->procs;
+ clnt->cl_maxproc = version->nrprocs;
+ clnt->cl_protname = program->name;
+ 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);
+ if (err != 0) {
+ rpc_shutdown_client(clnt);
+ clnt = ERR_PTR(err);
+ }
+out:
+ return clnt;
+}
+
/*
* Default callback for async RPC calls
*/
static void
-rpc_default_callback(struct rpc_task *task)
+rpc_default_callback(struct rpc_task *task, void *data)
{
}
+static const struct rpc_call_ops rpc_default_ops = {
+ .rpc_call_done = rpc_default_callback,
+};
+
/*
- * Export the signal mask handling for aysnchronous code that
+ * 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))
-void rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset)
+static void rpc_save_sigmask(sigset_t *oldset, int intr)
{
unsigned long sigallow = sigmask(SIGKILL);
- unsigned long irqflags;
-
- /* Turn off various signals */
- if (clnt->cl_intr) {
- struct k_sigaction *action = current->sighand->action;
- if (action[SIGINT-1].sa.sa_handler == SIG_DFL)
- sigallow |= sigmask(SIGINT);
- if (action[SIGQUIT-1].sa.sa_handler == SIG_DFL)
- sigallow |= sigmask(SIGQUIT);
- }
- spin_lock_irqsave(¤t->sighand->siglock, irqflags);
- *oldset = current->blocked;
- siginitsetinv(¤t->blocked, sigallow & ~oldset->sig[0]);
- recalc_sigpending();
- spin_unlock_irqrestore(¤t->sighand->siglock, irqflags);
+ 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)
{
- unsigned long irqflags;
-
- spin_lock_irqsave(¤t->sighand->siglock, irqflags);
- current->blocked = *oldset;
- recalc_sigpending();
- spin_unlock_irqrestore(¤t->sighand->siglock, irqflags);
+ rpc_restore_sigmask(oldset);
}
/*
BUG_ON(flags & RPC_TASK_ASYNC);
- rpc_clnt_sigmask(clnt, &oldset);
-
status = -ENOMEM;
- task = rpc_new_task(clnt, NULL, flags);
+ task = rpc_new_task(clnt, flags, &rpc_default_ops, NULL);
if (task == NULL)
goto out;
+ /* Mask signals on RPC calls _and_ GSS_AUTH upcalls */
+ rpc_task_sigmask(task, &oldset);
+
rpc_call_setup(task, msg, 0);
/* Set up the call info struct and execute the task */
- if (task->tk_status == 0)
+ status = task->tk_status;
+ if (status == 0) {
+ atomic_inc(&task->tk_count);
status = rpc_execute(task);
- else {
- status = task->tk_status;
- rpc_release_task(task);
+ if (status == 0)
+ status = task->tk_status;
}
-
+ rpc_restore_sigmask(&oldset);
+ rpc_release_task(task);
out:
- rpc_clnt_sigunmask(clnt, &oldset);
-
return status;
}
*/
int
rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags,
- rpc_action callback, void *data)
+ const struct rpc_call_ops *tk_ops, void *data)
{
struct rpc_task *task;
sigset_t oldset;
int status;
/* If this client is slain all further I/O fails */
+ status = -EIO;
if (clnt->cl_dead)
- return -EIO;
+ goto out_release;
flags |= RPC_TASK_ASYNC;
- rpc_clnt_sigmask(clnt, &oldset);
-
/* Create/initialize a new RPC task */
- if (!callback)
- callback = rpc_default_callback;
status = -ENOMEM;
- if (!(task = rpc_new_task(clnt, callback, flags)))
- goto out;
- task->tk_calldata = data;
+ if (!(task = rpc_new_task(clnt, flags, tk_ops, data)))
+ goto out_release;
+
+ /* Mask signals on GSS_AUTH upcalls */
+ rpc_task_sigmask(task, &oldset);
rpc_call_setup(task, msg, 0);
else
rpc_release_task(task);
-out:
- rpc_clnt_sigunmask(clnt, &oldset);
-
+ rpc_restore_sigmask(&oldset);
+ return status;
+out_release:
+ if (tk_ops->rpc_release != NULL)
+ tk_ops->rpc_release(data);
return status;
}
if (task->tk_status == 0)
task->tk_action = call_start;
else
- task->tk_action = NULL;
+ task->tk_action = rpc_exit_task;
}
void
rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize)
{
struct rpc_xprt *xprt = clnt->cl_xprt;
-
- xprt->sndsize = 0;
- if (sndsize)
- xprt->sndsize = sndsize + RPC_SLACK_SPACE;
- xprt->rcvsize = 0;
- if (rcvsize)
- xprt->rcvsize = rcvsize + RPC_SLACK_SPACE;
- if (xprt_connected(xprt))
- xprt_sock_setbufsize(xprt);
+ if (xprt->ops->set_buffer_size)
+ xprt->ops->set_buffer_size(xprt, sndsize, rcvsize);
}
/*
}
EXPORT_SYMBOL(rpc_max_payload);
+/**
+ * rpc_force_rebind - force transport to check that remote port is unchanged
+ * @clnt: client to rebind
+ *
+ */
+void rpc_force_rebind(struct rpc_clnt *clnt)
+{
+ if (clnt->cl_autobind)
+ clnt->cl_port = 0;
+}
+EXPORT_SYMBOL(rpc_force_rebind);
+
/*
* Restart an (async) RPC call. Usually called from within the
* exit handler.
/*
* 2. Allocate the buffer. For details, see sched.c:rpc_malloc.
- * (Note: buffer memory is freed in rpc_task_release).
+ * (Note: buffer memory is freed in xprt_release).
*/
static void
call_allocate(struct rpc_task *task)
{
+ struct rpc_rqst *req = task->tk_rqstp;
+ struct rpc_xprt *xprt = task->tk_xprt;
unsigned int bufsiz;
dprintk("RPC: %4d call_allocate (status %d)\n",
task->tk_pid, task->tk_status);
task->tk_action = call_bind;
- if (task->tk_buffer)
+ if (req->rq_buffer)
return;
/* FIXME: compute buffer requirements more exactly using
* auth->au_wslack */
bufsiz = task->tk_msg.rpc_proc->p_bufsiz + RPC_SLACK_SPACE;
- if (rpc_malloc(task, bufsiz << 1) != NULL)
+ if (xprt->ops->buf_alloc(task, bufsiz << 1) != NULL)
return;
printk(KERN_INFO "RPC: buffer allocation failed for task %p\n", task);
- if (RPC_IS_ASYNC(task) || !(task->tk_client->cl_intr && signalled())) {
+ if (RPC_IS_ASYNC(task) || !signalled()) {
xprt_release(task);
task->tk_action = call_reserve;
rpc_delay(task, HZ>>4);
rpc_exit(task, -ERESTARTSYS);
}
+static inline int
+rpc_task_need_encode(struct rpc_task *task)
+{
+ return task->tk_rqstp->rq_snd_buf.len == 0;
+}
+
+static inline void
+rpc_task_force_reencode(struct rpc_task *task)
+{
+ task->tk_rqstp->rq_snd_buf.len = 0;
+}
+
/*
* 3. Encode arguments of an RPC call
*/
static void
call_encode(struct rpc_task *task)
{
- struct rpc_clnt *clnt = task->tk_client;
struct rpc_rqst *req = task->tk_rqstp;
struct xdr_buf *sndbuf = &req->rq_snd_buf;
struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
unsigned int bufsiz;
kxdrproc_t encode;
- int status;
u32 *p;
dprintk("RPC: %4d call_encode (status %d)\n",
task->tk_pid, task->tk_status);
/* Default buffer setup */
- bufsiz = task->tk_bufsize >> 1;
- sndbuf->head[0].iov_base = (void *)task->tk_buffer;
+ bufsiz = req->rq_bufsize >> 1;
+ sndbuf->head[0].iov_base = (void *)req->rq_buffer;
sndbuf->head[0].iov_len = bufsiz;
sndbuf->tail[0].iov_len = 0;
sndbuf->page_len = 0;
sndbuf->len = 0;
sndbuf->buflen = bufsiz;
- rcvbuf->head[0].iov_base = (void *)((char *)task->tk_buffer + bufsiz);
+ rcvbuf->head[0].iov_base = (void *)((char *)req->rq_buffer + bufsiz);
rcvbuf->head[0].iov_len = bufsiz;
rcvbuf->tail[0].iov_len = 0;
rcvbuf->page_len = 0;
rpc_exit(task, -EIO);
return;
}
- if (encode && (status = rpcauth_wrap_req(task, encode, req, p,
- task->tk_msg.rpc_argp)) < 0) {
- printk(KERN_WARNING "%s: can't encode arguments: %d\n",
- clnt->cl_protname, -status);
- rpc_exit(task, status);
+ 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;
}
}
call_bind(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
- struct rpc_xprt *xprt = clnt->cl_xprt;
-
- dprintk("RPC: %4d call_bind xprt %p %s connected\n", task->tk_pid,
- xprt, (xprt_connected(xprt) ? "is" : "is not"));
- task->tk_action = (xprt_connected(xprt)) ? call_transmit : call_connect;
+ dprintk("RPC: %4d call_bind (status %d)\n",
+ task->tk_pid, task->tk_status);
+ task->tk_action = call_connect;
if (!clnt->cl_port) {
- task->tk_action = call_connect;
- task->tk_timeout = RPC_CONNECT_TIMEOUT;
+ task->tk_action = call_bind_status;
+ task->tk_timeout = task->tk_xprt->bind_timeout;
rpc_getport(task, clnt);
}
}
/*
- * 4a. Connect to the RPC server (TCP case)
+ * 4a. Sort out bind result
+ */
+static void
+call_bind_status(struct rpc_task *task)
+{
+ int status = -EACCES;
+
+ if (task->tk_status >= 0) {
+ dprintk("RPC: %4d call_bind_status (status %d)\n",
+ task->tk_pid, task->tk_status);
+ task->tk_status = 0;
+ task->tk_action = call_connect;
+ return;
+ }
+
+ switch (task->tk_status) {
+ case -EACCES:
+ dprintk("RPC: %4d remote rpcbind: RPC program/version unavailable\n",
+ task->tk_pid);
+ rpc_delay(task, 3*HZ);
+ goto retry_bind;
+ case -ETIMEDOUT:
+ dprintk("RPC: %4d rpcbind request timed out\n",
+ task->tk_pid);
+ if (RPC_IS_SOFT(task)) {
+ status = -EIO;
+ break;
+ }
+ goto retry_bind;
+ case -EPFNOSUPPORT:
+ dprintk("RPC: %4d remote rpcbind service unavailable\n",
+ task->tk_pid);
+ break;
+ case -EPROTONOSUPPORT:
+ dprintk("RPC: %4d remote rpcbind version 2 unavailable\n",
+ task->tk_pid);
+ break;
+ default:
+ dprintk("RPC: %4d unrecognized rpcbind error (%d)\n",
+ task->tk_pid, -task->tk_status);
+ status = -EIO;
+ break;
+ }
+
+ rpc_exit(task, status);
+ return;
+
+retry_bind:
+ task->tk_status = 0;
+ task->tk_action = call_bind;
+ return;
+}
+
+/*
+ * 4b. Connect to the RPC server
*/
static void
call_connect(struct rpc_task *task)
{
- struct rpc_clnt *clnt = task->tk_client;
+ struct rpc_xprt *xprt = task->tk_xprt;
- dprintk("RPC: %4d call_connect status %d\n",
- task->tk_pid, task->tk_status);
+ dprintk("RPC: %4d call_connect xprt %p %s connected\n",
+ task->tk_pid, xprt,
+ (xprt_connected(xprt) ? "is" : "is not"));
- if (xprt_connected(clnt->cl_xprt)) {
- task->tk_action = call_transmit;
- return;
+ task->tk_action = call_transmit;
+ if (!xprt_connected(xprt)) {
+ task->tk_action = call_connect_status;
+ if (task->tk_status < 0)
+ return;
+ xprt_connect(task);
}
- task->tk_action = call_connect_status;
- if (task->tk_status < 0)
- return;
- xprt_connect(task);
}
/*
- * 4b. Sort out connect result
+ * 4c. Sort out connect result
*/
static void
call_connect_status(struct rpc_task *task)
struct rpc_clnt *clnt = task->tk_client;
int status = task->tk_status;
+ dprintk("RPC: %5u call_connect_status (status %d)\n",
+ task->tk_pid, task->tk_status);
+
task->tk_status = 0;
if (status >= 0) {
clnt->cl_stats->netreconn++;
return;
}
- /* Something failed: we may have to rebind */
- if (clnt->cl_autobind)
- clnt->cl_port = 0;
+ /* Something failed: remote service port may have changed */
+ rpc_force_rebind(clnt);
+
switch (status) {
case -ENOTCONN:
case -ETIMEDOUT:
case -EAGAIN:
- task->tk_action = (clnt->cl_port == 0) ? call_bind : call_connect;
+ task->tk_action = call_bind;
break;
default:
rpc_exit(task, -EIO);
+ break;
}
}
if (task->tk_status != 0)
return;
/* Encode here so that rpcsec_gss can use correct sequence number. */
- if (!task->tk_rqstp->rq_bytes_sent)
+ if (rpc_task_need_encode(task)) {
+ task->tk_rqstp->rq_bytes_sent = 0;
call_encode(task);
- if (task->tk_status < 0)
- return;
+ /* Did the encode result in an error condition? */
+ if (task->tk_status != 0)
+ goto out_nosend;
+ }
+ task->tk_action = call_transmit_status;
xprt_transmit(task);
if (task->tk_status < 0)
return;
if (!task->tk_msg.rpc_proc->p_decode) {
- task->tk_action = NULL;
+ task->tk_action = rpc_exit_task;
rpc_wake_up_task(task);
}
+ return;
+out_nosend:
+ /* release socket write lock before attempting to handle error */
+ xprt_abort_transmit(task);
+ rpc_task_force_reencode(task);
}
/*
break;
case -ECONNREFUSED:
case -ENOTCONN:
- req->rq_bytes_sent = 0;
- if (clnt->cl_autobind)
- clnt->cl_port = 0;
+ rpc_force_rebind(clnt);
task->tk_action = call_bind;
break;
case -EAGAIN:
rpc_exit(task, status);
break;
default:
- if (clnt->cl_chatty)
- printk("%s: RPC call returned error %d\n",
+ printk("%s: RPC call returned error %d\n",
clnt->cl_protname, -status);
rpc_exit(task, status);
break;
}
/*
- * 6a. Handle RPC timeout
+ * 6a. Handle transmission errors.
+ */
+static void
+call_transmit_status(struct rpc_task *task)
+{
+ if (task->tk_status != -EAGAIN)
+ rpc_task_force_reencode(task);
+ call_status(task);
+}
+
+/*
+ * 6b. Handle RPC timeout
* We do not release the request slot, so we keep using the
* same XID for all retransmits.
*/
}
dprintk("RPC: %4d call_timeout (major)\n", task->tk_pid);
+ task->tk_timeouts++;
+
if (RPC_IS_SOFT(task)) {
- if (clnt->cl_chatty)
- printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
+ printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
clnt->cl_protname, clnt->cl_server);
rpc_exit(task, -EIO);
return;
}
- if (clnt->cl_chatty && !(task->tk_flags & RPC_CALL_MAJORSEEN)) {
+ if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) {
task->tk_flags |= RPC_CALL_MAJORSEEN;
printk(KERN_NOTICE "%s: server %s not responding, still trying\n",
clnt->cl_protname, clnt->cl_server);
}
- if (clnt->cl_autobind)
- clnt->cl_port = 0;
+ rpc_force_rebind(clnt);
retry:
clnt->cl_stats->rpcretrans++;
dprintk("RPC: %4d call_decode (status %d)\n",
task->tk_pid, task->tk_status);
- if (clnt->cl_chatty && (task->tk_flags & RPC_CALL_MAJORSEEN)) {
+ if (task->tk_flags & RPC_CALL_MAJORSEEN) {
printk(KERN_NOTICE "%s: server %s OK\n",
clnt->cl_protname, clnt->cl_server);
task->tk_flags &= ~RPC_CALL_MAJORSEEN;
return;
}
+ /*
+ * Ensure that we see all writes made by xprt_complete_rqst()
+ * before it changed req->rq_received.
+ */
+ smp_rmb();
req->rq_rcv_buf.len = req->rq_private_buf.len;
/* Check that the softirq receive buffer is valid */
sizeof(req->rq_rcv_buf)) != 0);
/* Verify the RPC header */
- if (!(p = call_verify(task))) {
- if (task->tk_action == NULL)
- return;
- goto out_retry;
+ p = call_verify(task);
+ if (IS_ERR(p)) {
+ if (p == ERR_PTR(-EAGAIN))
+ goto out_retry;
+ return;
}
- task->tk_action = NULL;
+ task->tk_action = rpc_exit_task;
if (decode)
task->tk_status = rpcauth_unwrap_resp(task, decode, req, p,
call_header(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
- struct rpc_xprt *xprt = clnt->cl_xprt;
struct rpc_rqst *req = task->tk_rqstp;
u32 *p = req->rq_svec[0].iov_base;
/* FIXME: check buffer size? */
- if (xprt->stream)
- *p++ = 0; /* fill in later */
+
+ p = xprt_skip_transport_header(task->tk_xprt, p);
*p++ = req->rq_xid; /* XID */
*p++ = htonl(RPC_CALL); /* CALL */
*p++ = htonl(RPC_VERSION); /* RPC version */
*p++ = htonl(clnt->cl_prog); /* program number */
*p++ = htonl(clnt->cl_vers); /* program version */
*p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */
- return rpcauth_marshcred(task, p);
+ p = rpcauth_marshcred(task, p);
+ req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p);
+ return p;
}
/*
if ((n = ntohl(*p++)) != RPC_REPLY) {
printk(KERN_WARNING "call_verify: not an RPC reply: %x\n", n);
- goto out_retry;
+ goto out_garbage;
}
if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) {
if (--len < 0)
case RPC_AUTH_ERROR:
break;
case RPC_MISMATCH:
- printk(KERN_WARNING "%s: RPC call version mismatch!\n", __FUNCTION__);
- goto out_eio;
+ dprintk("%s: RPC call version mismatch!\n", __FUNCTION__);
+ error = -EPROTONOSUPPORT;
+ goto out_err;
default:
- printk(KERN_WARNING "%s: RPC call rejected, unknown error: %x\n", __FUNCTION__, n);
+ dprintk("%s: RPC call rejected, unknown error: %x\n", __FUNCTION__, n);
goto out_eio;
}
if (--len < 0)
task->tk_pid);
rpcauth_invalcred(task);
task->tk_action = call_refresh;
- return NULL;
+ goto out_retry;
case RPC_AUTH_BADCRED:
case RPC_AUTH_BADVERF:
/* possibly garbled cred/verf? */
dprintk("RPC: %4d call_verify: retry garbled creds\n",
task->tk_pid);
task->tk_action = call_bind;
- return NULL;
+ goto out_retry;
case RPC_AUTH_TOOWEAK:
- printk(KERN_NOTICE "call_verify: server requires stronger "
- "authentication.\n");
+ printk(KERN_NOTICE "call_verify: server %s requires stronger "
+ "authentication.\n", task->tk_client->cl_server);
break;
default:
printk(KERN_WARNING "call_verify: unknown auth error: %x\n", n);
}
if (!(p = rpcauth_checkverf(task, p))) {
printk(KERN_WARNING "call_verify: auth check failed\n");
- goto out_retry; /* bad verifier, retry */
+ goto out_garbage; /* bad verifier, retry */
}
len = p - (u32 *)iov->iov_base - 1;
if (len < 0)
case RPC_SUCCESS:
return p;
case RPC_PROG_UNAVAIL:
- printk(KERN_WARNING "RPC: call_verify: program %u is unsupported by server %s\n",
+ dprintk("RPC: call_verify: program %u is unsupported by server %s\n",
(unsigned int)task->tk_client->cl_prog,
task->tk_client->cl_server);
- goto out_eio;
+ error = -EPFNOSUPPORT;
+ goto out_err;
case RPC_PROG_MISMATCH:
- printk(KERN_WARNING "RPC: call_verify: program %u, version %u unsupported by server %s\n",
+ dprintk("RPC: call_verify: program %u, version %u unsupported by server %s\n",
(unsigned int)task->tk_client->cl_prog,
(unsigned int)task->tk_client->cl_vers,
task->tk_client->cl_server);
- goto out_eio;
+ error = -EPROTONOSUPPORT;
+ goto out_err;
case RPC_PROC_UNAVAIL:
- printk(KERN_WARNING "RPC: call_verify: proc %p unsupported by program %u, version %u on server %s\n",
+ dprintk("RPC: call_verify: proc %p unsupported by program %u, version %u on server %s\n",
task->tk_msg.rpc_proc,
task->tk_client->cl_prog,
task->tk_client->cl_vers,
task->tk_client->cl_server);
- goto out_eio;
+ error = -EOPNOTSUPP;
+ goto out_err;
case RPC_GARBAGE_ARGS:
dprintk("RPC: %4d %s: server saw garbage\n", task->tk_pid, __FUNCTION__);
break; /* retry */
/* Also retry */
}
-out_retry:
+out_garbage:
task->tk_client->cl_stats->rpcgarbage++;
if (task->tk_garb_retry) {
task->tk_garb_retry--;
- dprintk(KERN_WARNING "RPC %s: retrying %4d\n", __FUNCTION__, task->tk_pid);
+ dprintk("RPC %s: retrying %4d\n", __FUNCTION__, task->tk_pid);
task->tk_action = call_bind;
- return NULL;
+out_retry:
+ return ERR_PTR(-EAGAIN);
}
printk(KERN_WARNING "RPC %s: retry failed, exit EIO\n", __FUNCTION__);
out_eio:
error = -EIO;
out_err:
rpc_exit(task, error);
- return NULL;
+ return ERR_PTR(error);
out_overflow:
printk(KERN_WARNING "RPC %s: server reply was truncated.\n", __FUNCTION__);
- goto out_retry;
+ goto out_garbage;
+}
+
+static int rpcproc_encode_null(void *rqstp, u32 *data, void *obj)
+{
+ return 0;
+}
+
+static int rpcproc_decode_null(void *rqstp, u32 *data, void *obj)
+{
+ return 0;
+}
+
+static struct rpc_procinfo rpcproc_null = {
+ .p_encode = rpcproc_encode_null,
+ .p_decode = rpcproc_decode_null,
+};
+
+int rpc_ping(struct rpc_clnt *clnt, int flags)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &rpcproc_null,
+ };
+ int err;
+ msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0);
+ err = rpc_call_sync(clnt, &msg, flags);
+ put_rpccred(msg.rpc_cred);
+ return err;
}
git://git.onelab.eu / linux-2.6.git / blobdiff