summaryrefslogtreecommitdiffstats
path: root/net/sunrpc
diff options
context:
space:
mode:
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c17
-rw-r--r--net/sunrpc/backchannel_rqst.c9
-rw-r--r--net/sunrpc/bc_svc.c2
-rw-r--r--net/sunrpc/cache.c4
-rw-r--r--net/sunrpc/clnt.c45
-rw-r--r--net/sunrpc/rpc_pipe.c9
-rw-r--r--net/sunrpc/rpcb_clnt.c6
-rw-r--r--net/sunrpc/sched.c101
-rw-r--r--net/sunrpc/svc.c20
-rw-r--r--net/sunrpc/svc_xprt.c11
-rw-r--r--net/sunrpc/svcsock.c104
-rw-r--r--net/sunrpc/xdr.c5
-rw-r--r--net/sunrpc/xprt.c12
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_recvfrom.c10
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_sendto.c4
-rw-r--r--net/sunrpc/xprtsock.c19
16 files changed, 235 insertions, 143 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 909dc0c31aab..6e5c824b040b 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -192,17 +192,23 @@ gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct
const void *q;
unsigned int seclen;
unsigned int timeout;
+ unsigned long now = jiffies;
u32 window_size;
int ret;
- /* First unsigned int gives the lifetime (in seconds) of the cred */
+ /* First unsigned int gives the remaining lifetime in seconds of the
+ * credential - e.g. the remaining TGT lifetime for Kerberos or
+ * the -t value passed to GSSD.
+ */
p = simple_get_bytes(p, end, &timeout, sizeof(timeout));
if (IS_ERR(p))
goto err;
if (timeout == 0)
timeout = GSSD_MIN_TIMEOUT;
- ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4;
- /* Sequence number window. Determines the maximum number of simultaneous requests */
+ ctx->gc_expiry = now + ((unsigned long)timeout * HZ);
+ /* Sequence number window. Determines the maximum number of
+ * simultaneous requests
+ */
p = simple_get_bytes(p, end, &window_size, sizeof(window_size));
if (IS_ERR(p))
goto err;
@@ -237,9 +243,12 @@ gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct
p = ERR_PTR(ret);
goto err;
}
+ dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n",
+ __func__, ctx->gc_expiry, now, timeout);
return q;
err:
- dprintk("RPC: %s returning %ld\n", __func__, -PTR_ERR(p));
+ dprintk("RPC: %s returns %ld gc_expiry %lu now %lu timeout %u\n",
+ __func__, -PTR_ERR(p), ctx->gc_expiry, now, timeout);
return p;
}
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c
index a9c0bbccad6b..890a29912d5a 100644
--- a/net/sunrpc/backchannel_rqst.c
+++ b/net/sunrpc/backchannel_rqst.c
@@ -59,7 +59,7 @@ static void xprt_free_allocation(struct rpc_rqst *req)
struct xdr_buf *xbufp;
dprintk("RPC: free allocations for req= %p\n", req);
- BUG_ON(test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state));
+ WARN_ON_ONCE(test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state));
xbufp = &req->rq_private_buf;
free_page((unsigned long)xbufp->head[0].iov_base);
xbufp = &req->rq_snd_buf;
@@ -191,7 +191,9 @@ void xprt_destroy_backchannel(struct rpc_xprt *xprt, unsigned int max_reqs)
dprintk("RPC: destroy backchannel transport\n");
- BUG_ON(max_reqs == 0);
+ if (max_reqs == 0)
+ goto out;
+
spin_lock_bh(&xprt->bc_pa_lock);
xprt_dec_alloc_count(xprt, max_reqs);
list_for_each_entry_safe(req, tmp, &xprt->bc_pa_list, rq_bc_pa_list) {
@@ -202,6 +204,7 @@ void xprt_destroy_backchannel(struct rpc_xprt *xprt, unsigned int max_reqs)
}
spin_unlock_bh(&xprt->bc_pa_lock);
+out:
dprintk("RPC: backchannel list empty= %s\n",
list_empty(&xprt->bc_pa_list) ? "true" : "false");
}
@@ -255,7 +258,7 @@ void xprt_free_bc_request(struct rpc_rqst *req)
dprintk("RPC: free backchannel req=%p\n", req);
smp_mb__before_clear_bit();
- BUG_ON(!test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state));
+ WARN_ON_ONCE(!test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state));
clear_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state);
smp_mb__after_clear_bit();
diff --git a/net/sunrpc/bc_svc.c b/net/sunrpc/bc_svc.c
index 0b2eb388cbda..15c7a8a1c24f 100644
--- a/net/sunrpc/bc_svc.c
+++ b/net/sunrpc/bc_svc.c
@@ -53,7 +53,7 @@ int bc_send(struct rpc_rqst *req)
if (IS_ERR(task))
ret = PTR_ERR(task);
else {
- BUG_ON(atomic_read(&task->tk_count) != 1);
+ WARN_ON_ONCE(atomic_read(&task->tk_count) != 1);
ret = task->tk_status;
rpc_put_task(task);
}
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index fc2f7aa4dca7..9afa4393c217 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -775,11 +775,11 @@ static ssize_t cache_read(struct file *filp, char __user *buf, size_t count,
if (rp->q.list.next == &cd->queue) {
spin_unlock(&queue_lock);
mutex_unlock(&inode->i_mutex);
- BUG_ON(rp->offset);
+ WARN_ON_ONCE(rp->offset);
return 0;
}
rq = container_of(rp->q.list.next, struct cache_request, q.list);
- BUG_ON(rq->q.reader);
+ WARN_ON_ONCE(rq->q.reader);
if (rp->offset == 0)
rq->readers++;
spin_unlock(&queue_lock);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index cdc7564b4512..507b5e84fbdb 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -132,8 +132,10 @@ static struct dentry *rpc_setup_pipedir_sb(struct super_block *sb,
int error;
dir = rpc_d_lookup_sb(sb, dir_name);
- if (dir == NULL)
+ if (dir == NULL) {
+ pr_info("RPC: pipefs directory doesn't exist: %s\n", dir_name);
return dir;
+ }
for (;;) {
q.len = snprintf(name, sizeof(name), "clnt%x", (unsigned int)clntid++);
name[sizeof(name) - 1] = '\0';
@@ -192,7 +194,8 @@ static int __rpc_clnt_handle_event(struct rpc_clnt *clnt, unsigned long event,
case RPC_PIPEFS_MOUNT:
dentry = rpc_setup_pipedir_sb(sb, clnt,
clnt->cl_program->pipe_dir_name);
- BUG_ON(dentry == NULL);
+ if (!dentry)
+ return -ENOENT;
if (IS_ERR(dentry))
return PTR_ERR(dentry);
clnt->cl_dentry = dentry;
@@ -234,7 +237,7 @@ static struct rpc_clnt *rpc_get_client_for_event(struct net *net, int event)
spin_lock(&sn->rpc_client_lock);
list_for_each_entry(clnt, &sn->all_clients, cl_clients) {
if (clnt->cl_program->pipe_dir_name == NULL)
- break;
+ continue;
if (rpc_clnt_skip_event(clnt, event))
continue;
if (atomic_inc_not_zero(&clnt->cl_count) == 0)
@@ -552,7 +555,7 @@ EXPORT_SYMBOL_GPL(rpc_clone_client);
* rpc_clone_client_set_auth - Clone an RPC client structure and set its auth
*
* @clnt: RPC client whose parameters are copied
- * @auth: security flavor for new client
+ * @flavor: security flavor for new client
*
* Returns a fresh RPC client or an ERR_PTR.
*/
@@ -607,6 +610,8 @@ EXPORT_SYMBOL_GPL(rpc_killall_tasks);
*/
void rpc_shutdown_client(struct rpc_clnt *clnt)
{
+ might_sleep();
+
dprintk_rcu("RPC: shutting down %s client for %s\n",
clnt->cl_protname,
rcu_dereference(clnt->cl_xprt)->servername);
@@ -693,21 +698,19 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
const struct rpc_program *program,
u32 vers)
{
+ struct rpc_create_args args = {
+ .program = program,
+ .prognumber = program->number,
+ .version = vers,
+ .authflavor = old->cl_auth->au_flavor,
+ .client_name = old->cl_principal,
+ };
struct rpc_clnt *clnt;
- const struct rpc_version *version;
int err;
- BUG_ON(vers >= program->nrvers || !program->version[vers]);
- version = program->version[vers];
- clnt = rpc_clone_client(old);
+ clnt = __rpc_clone_client(&args, 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);
if (err != 0) {
rpc_shutdown_client(clnt);
@@ -832,7 +835,12 @@ int rpc_call_sync(struct rpc_clnt *clnt, const struct rpc_message *msg, int flag
};
int status;
- BUG_ON(flags & RPC_TASK_ASYNC);
+ WARN_ON_ONCE(flags & RPC_TASK_ASYNC);
+ if (flags & RPC_TASK_ASYNC) {
+ rpc_release_calldata(task_setup_data.callback_ops,
+ task_setup_data.callback_data);
+ return -EINVAL;
+ }
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
@@ -908,7 +916,7 @@ struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req,
task->tk_action = call_bc_transmit;
atomic_inc(&task->tk_count);
- BUG_ON(atomic_read(&task->tk_count) != 2);
+ WARN_ON_ONCE(atomic_read(&task->tk_count) != 2);
rpc_execute(task);
out:
@@ -1368,6 +1376,7 @@ call_refreshresult(struct rpc_task *task)
return;
case -ETIMEDOUT:
rpc_delay(task, 3*HZ);
+ case -EKEYEXPIRED:
case -EAGAIN:
status = -EACCES;
if (!task->tk_cred_retry)
@@ -1654,7 +1663,6 @@ call_transmit(struct rpc_task *task)
task->tk_action = call_transmit_status;
/* 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);
rpc_xdr_encode(task);
/* Did the encode result in an error condition? */
if (task->tk_status != 0) {
@@ -1738,7 +1746,6 @@ call_bc_transmit(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
- BUG_ON(task->tk_status != 0);
task->tk_status = xprt_prepare_transmit(task);
if (task->tk_status == -EAGAIN) {
/*
@@ -1785,7 +1792,7 @@ call_bc_transmit(struct rpc_task *task)
* We were unable to reply and will have to drop the
* request. The server should reconnect and retransmit.
*/
- BUG_ON(task->tk_status == -EAGAIN);
+ WARN_ON_ONCE(task->tk_status == -EAGAIN);
printk(KERN_NOTICE "RPC: Could not send backchannel reply "
"error: %d\n", task->tk_status);
break;
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 80f5dd23417d..fd10981ea792 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1093,7 +1093,7 @@ void rpc_put_sb_net(const struct net *net)
{
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
- BUG_ON(sn->pipefs_sb == NULL);
+ WARN_ON(sn->pipefs_sb == NULL);
mutex_unlock(&sn->pipefs_sb_lock);
}
EXPORT_SYMBOL_GPL(rpc_put_sb_net);
@@ -1152,14 +1152,19 @@ static void rpc_kill_sb(struct super_block *sb)
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
mutex_lock(&sn->pipefs_sb_lock);
+ if (sn->pipefs_sb != sb) {
+ mutex_unlock(&sn->pipefs_sb_lock);
+ goto out;
+ }
sn->pipefs_sb = NULL;
mutex_unlock(&sn->pipefs_sb_lock);
- put_net(net);
dprintk("RPC: sending pipefs UMOUNT notification for net %p%s\n",
net, NET_NAME(net));
blocking_notifier_call_chain(&rpc_pipefs_notifier_list,
RPC_PIPEFS_UMOUNT,
sb);
+ put_net(net);
+out:
kill_litter_super(sb);
}
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index a70acae496e4..795a0f4e920b 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -23,7 +23,6 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
-#include <linux/nsproxy.h>
#include <net/ipv6.h>
#include <linux/sunrpc/clnt.h>
@@ -884,7 +883,10 @@ static void encode_rpcb_string(struct xdr_stream *xdr, const char *string,
u32 len;
len = strlen(string);
- BUG_ON(len > maxstrlen);
+ WARN_ON_ONCE(len > maxstrlen);
+ if (len > maxstrlen)
+ /* truncate and hope for the best */
+ len = maxstrlen;
p = xdr_reserve_space(xdr, 4 + len);
xdr_encode_opaque(p, string, len);
}
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 6357fcb00c7e..bfa31714581f 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -98,6 +98,23 @@ __rpc_add_timer(struct rpc_wait_queue *queue, struct rpc_task *task)
list_add(&task->u.tk_wait.timer_list, &queue->timer_list.list);
}
+static void rpc_set_waitqueue_priority(struct rpc_wait_queue *queue, int priority)
+{
+ queue->priority = priority;
+}
+
+static void rpc_set_waitqueue_owner(struct rpc_wait_queue *queue, pid_t pid)
+{
+ queue->owner = pid;
+ queue->nr = RPC_BATCH_COUNT;
+}
+
+static void rpc_reset_waitqueue_priority(struct rpc_wait_queue *queue)
+{
+ rpc_set_waitqueue_priority(queue, queue->maxpriority);
+ rpc_set_waitqueue_owner(queue, 0);
+}
+
/*
* Add new request to a priority queue.
*/
@@ -109,9 +126,11 @@ static void __rpc_add_wait_queue_priority(struct rpc_wait_queue *queue,
struct rpc_task *t;
INIT_LIST_HEAD(&task->u.tk_wait.links);
- q = &queue->tasks[queue_priority];
if (unlikely(queue_priority > queue->maxpriority))
- q = &queue->tasks[queue->maxpriority];
+ queue_priority = queue->maxpriority;
+ if (queue_priority > queue->priority)
+ rpc_set_waitqueue_priority(queue, queue_priority);
+ q = &queue->tasks[queue_priority];
list_for_each_entry(t, q, u.tk_wait.list) {
if (t->tk_owner == task->tk_owner) {
list_add_tail(&task->u.tk_wait.list, &t->u.tk_wait.links);
@@ -133,7 +152,9 @@ static void __rpc_add_wait_queue(struct rpc_wait_queue *queue,
struct rpc_task *task,
unsigned char queue_priority)
{
- BUG_ON (RPC_IS_QUEUED(task));
+ WARN_ON_ONCE(RPC_IS_QUEUED(task));
+ if (RPC_IS_QUEUED(task))
+ return;
if (RPC_IS_PRIORITY(queue))
__rpc_add_wait_queue_priority(queue, task, queue_priority);
@@ -178,24 +199,6 @@ static void __rpc_remove_wait_queue(struct rpc_wait_queue *queue, struct rpc_tas
task->tk_pid, queue, rpc_qname(queue));
}
-static inline void rpc_set_waitqueue_priority(struct rpc_wait_queue *queue, int priority)
-{
- queue->priority = priority;
- queue->count = 1 << (priority * 2);
-}
-
-static inline void rpc_set_waitqueue_owner(struct rpc_wait_queue *queue, pid_t pid)
-{
- queue->owner = pid;
- queue->nr = RPC_BATCH_COUNT;
-}
-
-static inline void rpc_reset_waitqueue_priority(struct rpc_wait_queue *queue)
-{
- rpc_set_waitqueue_priority(queue, queue->maxpriority);
- rpc_set_waitqueue_owner(queue, 0);
-}
-
static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname, unsigned char nr_queues)
{
int i;
@@ -334,7 +337,7 @@ static void __rpc_sleep_on_priority(struct rpc_wait_queue *q,
__rpc_add_wait_queue(q, task, queue_priority);
- BUG_ON(task->tk_callback != NULL);
+ WARN_ON_ONCE(task->tk_callback != NULL);
task->tk_callback = action;
__rpc_add_timer(q, task);
}
@@ -343,7 +346,12 @@ void rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task,
rpc_action action)
{
/* We shouldn't ever put an inactive task to sleep */
- BUG_ON(!RPC_IS_ACTIVATED(task));
+ WARN_ON_ONCE(!RPC_IS_ACTIVATED(task));
+ if (!RPC_IS_ACTIVATED(task)) {
+ task->tk_status = -EIO;
+ rpc_put_task_async(task);
+ return;
+ }
/*
* Protect the queue operations.
@@ -358,7 +366,12 @@ void rpc_sleep_on_priority(struct rpc_wait_queue *q, struct rpc_task *task,
rpc_action action, int priority)
{
/* We shouldn't ever put an inactive task to sleep */
- BUG_ON(!RPC_IS_ACTIVATED(task));
+ WARN_ON_ONCE(!RPC_IS_ACTIVATED(task));
+ if (!RPC_IS_ACTIVATED(task)) {
+ task->tk_status = -EIO;
+ rpc_put_task_async(task);
+ return;
+ }
/*
* Protect the queue operations.
@@ -367,6 +380,7 @@ void rpc_sleep_on_priority(struct rpc_wait_queue *q, struct rpc_task *task,
__rpc_sleep_on_priority(q, task, action, priority - RPC_PRIORITY_LOW);
spin_unlock_bh(&q->lock);
}
+EXPORT_SYMBOL_GPL(rpc_sleep_on_priority);
/**
* __rpc_do_wake_up_task - wake up a single rpc_task
@@ -451,8 +465,7 @@ static struct rpc_task *__rpc_find_next_queued_priority(struct rpc_wait_queue *q
/*
* Check if we need to switch queues.
*/
- if (--queue->count)
- goto new_owner;
+ goto new_owner;
}
/*
@@ -697,7 +710,9 @@ static void __rpc_execute(struct rpc_task *task)
dprintk("RPC: %5u __rpc_execute flags=0x%x\n",
task->tk_pid, task->tk_flags);
- BUG_ON(RPC_IS_QUEUED(task));
+ WARN_ON_ONCE(RPC_IS_QUEUED(task));
+ if (RPC_IS_QUEUED(task))
+ return;
for (;;) {
void (*do_action)(struct rpc_task *);
@@ -919,16 +934,35 @@ struct rpc_task *rpc_new_task(const struct rpc_task_setup *setup_data)
return task;
}
+/*
+ * rpc_free_task - release rpc task and perform cleanups
+ *
+ * Note that we free up the rpc_task _after_ rpc_release_calldata()
+ * in order to work around a workqueue dependency issue.
+ *
+ * Tejun Heo states:
+ * "Workqueue currently considers two work items to be the same if they're
+ * on the same address and won't execute them concurrently - ie. it
+ * makes a work item which is queued again while being executed wait
+ * for the previous execution to complete.
+ *
+ * If a work function frees the work item, and then waits for an event
+ * which should be performed by another work item and *that* work item
+ * recycles the freed work item, it can create a false dependency loop.
+ * There really is no reliable way to detect this short of verifying
+ * every memory free."
+ *
+ */
static void rpc_free_task(struct rpc_task *task)
{
- const struct rpc_call_ops *tk_ops = task->tk_ops;
- void *calldata = task->tk_calldata;
+ unsigned short tk_flags = task->tk_flags;
+
+ rpc_release_calldata(task->tk_ops, task->tk_calldata);
- if (task->tk_flags & RPC_TASK_DYNAMIC) {
+ if (tk_flags & RPC_TASK_DYNAMIC) {
dprintk("RPC: %5u freeing task\n", task->tk_pid);
mempool_free(task, rpc_task_mempool);
}
- rpc_release_calldata(tk_ops, calldata);
}
static void rpc_async_release(struct work_struct *work)
@@ -938,8 +972,7 @@ static void rpc_async_release(struct work_struct *work)
static void rpc_release_resources_task(struct rpc_task *task)
{
- if (task->tk_rqstp)
- xprt_release(task);
+ xprt_release(task);
if (task->tk_msg.rpc_cred) {
put_rpccred(task->tk_msg.rpc_cred);
task->tk_msg.rpc_cred = NULL;
@@ -981,7 +1014,7 @@ static void rpc_release_task(struct rpc_task *task)
{
dprintk("RPC: %5u release task\n", task->tk_pid);
- BUG_ON (RPC_IS_QUEUED(task));
+ WARN_ON_ONCE(RPC_IS_QUEUED(task));
rpc_release_resources_task(task);
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 3ee7461926d8..dbf12ac5ecb7 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -20,7 +20,6 @@
#include <linux/module.h>
#include <linux/kthread.h>
#include <linux/slab.h>
-#include <linux/nsproxy.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/xdr.h>
@@ -324,7 +323,9 @@ svc_pool_map_set_cpumask(struct task_struct *task, unsigned int pidx)
* The caller checks for sv_nrpools > 1, which
* implies that we've been initialized.
*/
- BUG_ON(m->count == 0);
+ WARN_ON_ONCE(m->count == 0);
+ if (m->count == 0)
+ return;
switch (m->mode) {
case SVC_POOL_PERCPU:
@@ -585,7 +586,9 @@ svc_init_buffer(struct svc_rqst *rqstp, unsigned int size, int node)
* We assume one is at most one page
*/
arghi = 0;
- BUG_ON(pages > RPCSVC_MAXPAGES);
+ WARN_ON_ONCE(pages > RPCSVC_MAXPAGES);
+ if (pages > RPCSVC_MAXPAGES)
+ pages = RPCSVC_MAXPAGES;
while (pages) {
struct page *p = alloc_pages_node(node, GFP_KERNEL, 0);
if (!p)
@@ -946,7 +949,9 @@ int svc_register(const struct svc_serv *serv, struct net *net,
unsigned int i;
int error = 0;
- BUG_ON(proto == 0 && port == 0);
+ WARN_ON_ONCE(proto == 0 && port == 0);
+ if (proto == 0 && port == 0)
+ return -EINVAL;
for (progp = serv->sv_program; progp; progp = progp->pg_next) {
for (i = 0; i < progp->pg_nvers; i++) {
@@ -1035,7 +1040,7 @@ static void svc_unregister(const struct svc_serv *serv, struct net *net)
}
/*
- * Printk the given error with the address of the client that caused it.
+ * dprintk the given error with the address of the client that caused it.
*/
static __printf(2, 3)
void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
@@ -1049,8 +1054,7 @@ void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
vaf.fmt = fmt;
vaf.va = &args;
- net_warn_ratelimited("svc: %s: %pV",
- svc_print_addr(rqstp, buf, sizeof(buf)), &vaf);
+ dprintk("svc: %s: %pV", svc_print_addr(rqstp, buf, sizeof(buf)), &vaf);
va_end(args);
}
@@ -1299,7 +1303,7 @@ svc_process(struct svc_rqst *rqstp)
* Setup response xdr_buf.
* Initially it has just one page
*/
- rqstp->rq_resused = 1;
+ rqstp->rq_next_page = &rqstp->rq_respages[1];
resv->iov_base = page_address(rqstp->rq_respages[0]);
resv->iov_len = 0;
rqstp->rq_res.pages = rqstp->rq_respages + 1;
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 194d865fae72..b8e47fac7315 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -218,7 +218,9 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
*/
static void svc_xprt_received(struct svc_xprt *xprt)
{
- BUG_ON(!test_bit(XPT_BUSY, &xprt->xpt_flags));
+ WARN_ON_ONCE(!test_bit(XPT_BUSY, &xprt->xpt_flags));
+ if (!test_bit(XPT_BUSY, &xprt->xpt_flags))
+ return;
/* As soon as we clear busy, the xprt could be closed and
* 'put', so we need a reference to call svc_xprt_enqueue with:
*/
@@ -577,7 +579,10 @@ int svc_alloc_arg(struct svc_rqst *rqstp)
/* now allocate needed pages. If we get a failure, sleep briefly */
pages = (serv->sv_max_mesg + PAGE_SIZE) / PAGE_SIZE;
- BUG_ON(pages >= RPCSVC_MAXPAGES);
+ WARN_ON_ONCE(pages >= RPCSVC_MAXPAGES);
+ if (pages >= RPCSVC_MAXPAGES)
+ /* use as many pages as possible */
+ pages = RPCSVC_MAXPAGES - 1;
for (i = 0; i < pages ; i++)
while (rqstp->rq_pages[i] == NULL) {
struct page *p = alloc_page(GFP_KERNEL);
@@ -926,7 +931,7 @@ static void svc_delete_xprt(struct svc_xprt *xprt)
spin_lock_bh(&serv->sv_lock);
if (!test_and_set_bit(XPT_DETACHED, &xprt->xpt_flags))
list_del_init(&xprt->xpt_list);
- BUG_ON(!list_empty(&xprt->xpt_ready));
+ WARN_ON_ONCE(!list_empty(&xprt->xpt_ready));
if (test_bit(XPT_TEMP, &xprt->xpt_flags))
serv->sv_tmpcnt--;
spin_unlock_bh(&serv->sv_lock);
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 03827cef1fa7..0a148c9d2a5c 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -84,7 +84,11 @@ static struct lock_class_key svc_slock_key[2];
static void svc_reclassify_socket(struct socket *sock)
{
struct sock *sk = sock->sk;
- BUG_ON(sock_owned_by_user(sk));
+
+ WARN_ON_ONCE(sock_owned_by_user(sk));
+ if (sock_owned_by_user(sk))
+ return;
+
switch (sk->sk_family) {
case AF_INET:
sock_lock_init_class_and_name(sk, "slock-AF_INET-NFSD",
@@ -601,6 +605,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_respages = rqstp->rq_pages + 1 +
DIV_ROUND_UP(rqstp->rq_arg.page_len, PAGE_SIZE);
}
+ rqstp->rq_next_page = rqstp->rq_respages+1;
if (serv->sv_stats)
serv->sv_stats->netudpcnt++;
@@ -874,9 +879,9 @@ static unsigned int svc_tcp_restore_pages(struct svc_sock *svsk, struct svc_rqst
{
unsigned int i, len, npages;
- if (svsk->sk_tcplen <= sizeof(rpc_fraghdr))
+ if (svsk->sk_datalen == 0)
return 0;
- len = svsk->sk_tcplen - sizeof(rpc_fraghdr);
+ len = svsk->sk_datalen;
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
for (i = 0; i < npages; i++) {
if (rqstp->rq_pages[i] != NULL)
@@ -893,9 +898,9 @@ static void svc_tcp_save_pages(struct svc_sock *svsk, struct svc_rqst *rqstp)
{
unsigned int i, len, npages;
- if (svsk->sk_tcplen <= sizeof(rpc_fraghdr))
+ if (svsk->sk_datalen == 0)
return;
- len = svsk->sk_tcplen - sizeof(rpc_fraghdr);
+ len = svsk->sk_datalen;
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
for (i = 0; i < npages; i++) {
svsk->sk_pages[i] = rqstp->rq_pages[i];
@@ -907,9 +912,9 @@ static void svc_tcp_clear_pages(struct svc_sock *svsk)
{
unsigned int i, len, npages;
- if (svsk->sk_tcplen <= sizeof(rpc_fraghdr))
+ if (svsk->sk_datalen == 0)
goto out;
- len = svsk->sk_tcplen - sizeof(rpc_fraghdr);
+ len = svsk->sk_datalen;
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
for (i = 0; i < npages; i++) {
BUG_ON(svsk->sk_pages[i] == NULL);
@@ -918,13 +923,12 @@ static void svc_tcp_clear_pages(struct svc_sock *svsk)
}
out:
svsk->sk_tcplen = 0;
+ svsk->sk_datalen = 0;
}
/*
- * Receive data.
+ * Receive fragment record header.
* If we haven't gotten the record length yet, get the next four bytes.
- * Otherwise try to gobble up as much as possible up to the complete
- * record length.
*/
static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
{
@@ -950,32 +954,16 @@ static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
return -EAGAIN;
}
- svsk->sk_reclen = ntohl(svsk->sk_reclen);
- if (!(svsk->sk_reclen & RPC_LAST_STREAM_FRAGMENT)) {
- /* FIXME: technically, a record can be fragmented,
- * and non-terminal fragments will not have the top
- * bit set in the fragment length header.
- * But apparently no known nfs clients send fragmented
- * records. */
- net_notice_ratelimited("RPC: multiple fragments per record not supported\n");
- goto err_delete;
- }
-
- svsk->sk_reclen &= RPC_FRAGMENT_SIZE_MASK;
- dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen);
- if (svsk->sk_reclen > serv->sv_max_mesg) {
- net_notice_ratelimited("RPC: fragment too large: 0x%08lx\n",
- (unsigned long)svsk->sk_reclen);
+ dprintk("svc: TCP record, %d bytes\n", svc_sock_reclen(svsk));
+ if (svc_sock_reclen(svsk) + svsk->sk_datalen >
+ serv->sv_max_mesg) {
+ net_notice_ratelimited("RPC: fragment too large: %d\n",
+ svc_sock_reclen(svsk));
goto err_delete;
}
}
- if (svsk->sk_reclen < 8)
- goto err_delete; /* client is nuts. */
-
- len = svsk->sk_reclen;
-
- return len;
+ return svc_sock_reclen(svsk);
error:
dprintk("RPC: TCP recv_record got %d\n", len);
return len;
@@ -1019,7 +1007,7 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp)
if (dst->iov_len < src->iov_len)
return -EAGAIN; /* whatever; just giving up. */
memcpy(dst->iov_base, src->iov_base, src->iov_len);
- xprt_complete_rqst(req->rq_task, svsk->sk_reclen);
+ xprt_complete_rqst(req->rq_task, rqstp->rq_arg.len);
rqstp->rq_arg.len = 0;
return 0;
}
@@ -1038,6 +1026,17 @@ static int copy_pages_to_kvecs(struct kvec *vec, struct page **pages, int len)
return i;
}
+static void svc_tcp_fragment_received(struct svc_sock *svsk)
+{
+ /* If we have more data, signal svc_xprt_enqueue() to try again */
+ if (svc_recv_available(svsk) > sizeof(rpc_fraghdr))
+ set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
+ dprintk("svc: TCP %s record (%d bytes)\n",
+ svc_sock_final_rec(svsk) ? "final" : "nonfinal",
+ svc_sock_reclen(svsk));
+ svsk->sk_tcplen = 0;
+ svsk->sk_reclen = 0;
+}
/*
* Receive data from a TCP socket.
@@ -1064,29 +1063,39 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
goto error;
base = svc_tcp_restore_pages(svsk, rqstp);
- want = svsk->sk_reclen - base;
+ want = svc_sock_reclen(svsk) - (svsk->sk_tcplen - sizeof(rpc_fraghdr));
vec = rqstp->rq_vec;
pnum = copy_pages_to_kvecs(&vec[0], &rqstp->rq_pages[0],
- svsk->sk_reclen);
+ svsk->sk_datalen + want);
rqstp->rq_respages = &rqstp->rq_pages[pnum];
+ rqstp->rq_next_page = rqstp->rq_respages + 1;
/* Now receive data */
len = svc_partial_recvfrom(rqstp, vec, pnum, want, base);
- if (len >= 0)
+ if (len >= 0) {
svsk->sk_tcplen += len;
- if (len != want) {
+ svsk->sk_datalen += len;
+ }
+ if (len != want || !svc_sock_final_rec(svsk)) {
svc_tcp_save_pages(svsk, rqstp);
if (len < 0 && len != -EAGAIN)
- goto err_other;
- dprintk("svc: incomplete TCP record (%d of %d)\n",
- svsk->sk_tcplen, svsk->sk_reclen);
+ goto err_delete;
+ if (len == want)
+ svc_tcp_fragment_received(svsk);
+ else
+ dprintk("svc: incomplete TCP record (%d of %d)\n",
+ (int)(svsk->sk_tcplen - sizeof(rpc_fraghdr)),
+ svc_sock_reclen(svsk));
goto err_noclose;
}
- rqstp->rq_arg.len = svsk->sk_reclen;
+ if (svc_sock_reclen(svsk) < 8)
+ goto err_delete; /* client is nuts. */
+
+ rqstp->rq_arg.len = svsk->sk_datalen;
rqstp->rq_arg.page_base = 0;
if (rqstp->rq_arg.len <= rqstp->rq_arg.head[0].iov_len) {
rqstp->rq_arg.head[0].iov_len = rqstp->rq_arg.len;
@@ -1103,11 +1112,8 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
len = receive_cb_reply(svsk, rqstp);
/* Reset TCP read info */
- svsk->sk_reclen = 0;
- svsk->sk_tcplen = 0;
- /* If we have more data, signal svc_xprt_enqueue() to try again */
- if (svc_recv_available(svsk) > sizeof(rpc_fraghdr))
- set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
+ svsk->sk_datalen = 0;
+ svc_tcp_fragment_received(svsk);
if (len < 0)
goto error;
@@ -1116,15 +1122,14 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
if (serv->sv_stats)
serv->sv_stats->nettcpcnt++;
- dprintk("svc: TCP complete record (%d bytes)\n", rqstp->rq_arg.len);
return rqstp->rq_arg.len;
error:
if (len != -EAGAIN)
- goto err_other;
+ goto err_delete;
dprintk("RPC: TCP recvfrom got EAGAIN\n");
return 0;
-err_other:
+err_delete:
printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
svsk->sk_xprt.xpt_server->sv_name, -len);
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
@@ -1301,6 +1306,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
svsk->sk_reclen = 0;
svsk->sk_tcplen = 0;
+ svsk->sk_datalen = 0;
memset(&svsk->sk_pages[0], 0, sizeof(svsk->sk_pages));
tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF;
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 08f50afd5f2a..56055632f151 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -318,7 +318,10 @@ xdr_shrink_bufhead(struct xdr_buf *buf, size_t len)
tail = buf->tail;
head = buf->head;
- BUG_ON (len > head->iov_len);
+
+ WARN_ON_ONCE(len > head->iov_len);
+ if (len > head->iov_len)
+ len = head->iov_len;
/* Shift the tail first */
if (tail->iov_len != 0) {
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index bd462a532acf..33811db8788a 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1136,10 +1136,18 @@ static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt)
void xprt_release(struct rpc_task *task)
{
struct rpc_xprt *xprt;
- struct rpc_rqst *req;
+ struct rpc_rqst *req = task->tk_rqstp;
- if (!(req = task->tk_rqstp))
+ if (req == NULL) {
+ if (task->tk_client) {
+ rcu_read_lock();
+ xprt = rcu_dereference(task->tk_client->cl_xprt);
+ if (xprt->snd_task == task)
+ xprt_release_write(xprt, task);
+ rcu_read_unlock();
+ }
return;
+ }
xprt = req->rq_xprt;
if (task->tk_ops->rpc_count_stats != NULL)
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 41cb63b623df..0ce75524ed21 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -521,11 +521,11 @@ next_sge:
rqstp->rq_pages[ch_no] = NULL;
/*
- * Detach res pages. svc_release must see a resused count of
- * zero or it will attempt to put them.
+ * Detach res pages. If svc_release sees any it will attempt to
+ * put them.
*/
- while (rqstp->rq_resused)
- rqstp->rq_respages[--rqstp->rq_resused] = NULL;
+ while (rqstp->rq_next_page != rqstp->rq_respages)
+ *(--rqstp->rq_next_page) = NULL;
return err;
}
@@ -550,7 +550,7 @@ static int rdma_read_complete(struct svc_rqst *rqstp,
/* rq_respages starts after the last arg page */
rqstp->rq_respages = &rqstp->rq_arg.pages[page_no];
- rqstp->rq_resused = 0;
+ rqstp->rq_next_page = &rqstp->rq_arg.pages[page_no];
/* Rebuild rq_arg head and tail. */
rqstp->rq_arg.head[0] = head->arg.head[0];
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index 42eb7ba0b903..c1d124dc772b 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -548,6 +548,7 @@ static int send_reply(struct svcxprt_rdma *rdma,
int sge_no;
int sge_bytes;
int page_no;
+ int pages;
int ret;
/* Post a recv buffer to handle another request. */
@@ -611,7 +612,8 @@ static int send_reply(struct svcxprt_rdma *rdma,
* respages array. They are our pages until the I/O
* completes.
*/
- for (page_no = 0; page_no < rqstp->rq_resused; page_no++) {
+ pages = rqstp->rq_next_page - rqstp->rq_respages;
+ for (page_no = 0; page_no < pages; page_no++) {
ctxt->pages[page_no+1] = rqstp->rq_respages[page_no];
ctxt->count++;
rqstp->rq_respages[page_no] = NULL;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 75853cabf4c9..68b0a81c31d5 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1746,7 +1746,6 @@ static inline void xs_reclassify_socketu(struct socket *sock)
{
struct sock *sk = sock->sk;
- BUG_ON(sock_owned_by_user(sk));
sock_lock_init_class_and_name(sk, "slock-AF_LOCAL-RPC",
&xs_slock_key[1], "sk_lock-AF_LOCAL-RPC", &xs_key[1]);
}
@@ -1755,7 +1754,6 @@ static inline void xs_reclassify_socket4(struct socket *sock)
{
struct sock *sk = sock->sk;
- BUG_ON(sock_owned_by_user(sk));
sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC",
&xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]);
}
@@ -1764,13 +1762,16 @@ static inline void xs_reclassify_socket6(struct socket *sock)
{
struct sock *sk = sock->sk;
- BUG_ON(sock_owned_by_user(sk));
sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC",
&xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]);
}
static inline void xs_reclassify_socket(int family, struct socket *sock)
{
+ WARN_ON_ONCE(sock_owned_by_user(sock->sk));
+ if (sock_owned_by_user(sock->sk))
+ return;
+
switch (family) {
case AF_LOCAL:
xs_reclassify_socketu(sock);
@@ -1901,6 +1902,10 @@ static void xs_local_setup_socket(struct work_struct *work)
dprintk("RPC: xprt %p: socket %s does not exist\n",
xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
break;
+ case -ECONNREFUSED:
+ dprintk("RPC: xprt %p: connection refused for %s\n",
+ xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
+ break;
default:
printk(KERN_ERR "%s: unhandled error (%d) connecting to %s\n",
__func__, -status,
@@ -2329,9 +2334,11 @@ static void *bc_malloc(struct rpc_task *task, size_t size)
struct page *page;
struct rpc_buffer *buf;
- BUG_ON(size > PAGE_SIZE - sizeof(struct rpc_buffer));
- page = alloc_page(GFP_KERNEL);
+ WARN_ON_ONCE(size > PAGE_SIZE - sizeof(struct rpc_buffer));
+ if (size > PAGE_SIZE - sizeof(struct rpc_buffer))
+ return NULL;
+ page = alloc_page(GFP_KERNEL);
if (!page)
return NULL;
@@ -2393,7 +2400,6 @@ static int bc_send_request(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
struct svc_xprt *xprt;
- struct svc_sock *svsk;
u32 len;
dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid));
@@ -2401,7 +2407,6 @@ static int bc_send_request(struct rpc_task *task)
* Get the server socket associated with this callback xprt
*/
xprt = req->rq_xprt->bc_xprt;
- svsk = container_of(xprt, struct svc_sock, sk_xprt);
/*
* Grab the mutex to serialize data as the connection is shared
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 09:42:34 +0100