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-rw-r--r--fs/nfs/nfs4_fs.h2
-rw-r--r--fs/nfs/nfs4proc.c148
2 files changed, 103 insertions, 47 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index ac4f10b7f6c1..b547d935aaf0 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -464,7 +464,7 @@ extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_release_seqid(struct nfs_seqid *seqid);
extern void nfs_free_seqid(struct nfs_seqid *seqid);
-extern int nfs4_setup_sequence(const struct nfs_client *client,
+extern int nfs4_setup_sequence(struct nfs_client *client,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
struct rpc_task *task);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 7fd642303104..d0fd96b67640 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -96,6 +96,10 @@ static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
struct nfs_open_context *ctx, struct nfs4_label *ilabel,
struct nfs4_label *olabel);
#ifdef CONFIG_NFS_V4_1
+static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
+ struct rpc_cred *cred,
+ struct nfs4_slot *slot,
+ bool is_privileged);
static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
struct rpc_cred *);
static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
@@ -644,13 +648,14 @@ static int nfs40_sequence_done(struct rpc_task *task,
#if defined(CONFIG_NFS_V4_1)
-static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
+static void nfs41_release_slot(struct nfs4_slot *slot)
{
struct nfs4_session *session;
struct nfs4_slot_table *tbl;
- struct nfs4_slot *slot = res->sr_slot;
bool send_new_highest_used_slotid = false;
+ if (!slot)
+ return;
tbl = slot->table;
session = tbl->session;
@@ -676,13 +681,18 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
send_new_highest_used_slotid = false;
out_unlock:
spin_unlock(&tbl->slot_tbl_lock);
- res->sr_slot = NULL;
if (send_new_highest_used_slotid)
nfs41_notify_server(session->clp);
if (waitqueue_active(&tbl->slot_waitq))
wake_up_all(&tbl->slot_waitq);
}
+static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
+{
+ nfs41_release_slot(res->sr_slot);
+ res->sr_slot = NULL;
+}
+
static int nfs41_sequence_process(struct rpc_task *task,
struct nfs4_sequence_res *res)
{
@@ -710,13 +720,6 @@ static int nfs41_sequence_process(struct rpc_task *task,
/* Check the SEQUENCE operation status */
switch (res->sr_status) {
case 0:
- /* If previous op on slot was interrupted and we reused
- * the seq# and got a reply from the cache, then retry
- */
- if (task->tk_status == -EREMOTEIO && interrupted) {
- ++slot->seq_nr;
- goto retry_nowait;
- }
/* Update the slot's sequence and clientid lease timer */
slot->seq_done = 1;
clp = session->clp;
@@ -750,16 +753,16 @@ static int nfs41_sequence_process(struct rpc_task *task,
* The slot id we used was probably retired. Try again
* using a different slot id.
*/
+ if (slot->seq_nr < slot->table->target_highest_slotid)
+ goto session_recover;
goto retry_nowait;
case -NFS4ERR_SEQ_MISORDERED:
/*
* Was the last operation on this sequence interrupted?
* If so, retry after bumping the sequence number.
*/
- if (interrupted) {
- ++slot->seq_nr;
- goto retry_nowait;
- }
+ if (interrupted)
+ goto retry_new_seq;
/*
* Could this slot have been previously retired?
* If so, then the server may be expecting seq_nr = 1!
@@ -768,10 +771,11 @@ static int nfs41_sequence_process(struct rpc_task *task,
slot->seq_nr = 1;
goto retry_nowait;
}
- break;
+ goto session_recover;
case -NFS4ERR_SEQ_FALSE_RETRY:
- ++slot->seq_nr;
- goto retry_nowait;
+ if (interrupted)
+ goto retry_new_seq;
+ goto session_recover;
default:
/* Just update the slot sequence no. */
slot->seq_done = 1;
@@ -781,6 +785,11 @@ out:
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
out_noaction:
return ret;
+session_recover:
+ nfs4_schedule_session_recovery(session, res->sr_status);
+ goto retry_nowait;
+retry_new_seq:
+ ++slot->seq_nr;
retry_nowait:
if (rpc_restart_call_prepare(task)) {
nfs41_sequence_free_slot(res);
@@ -857,6 +866,17 @@ static const struct rpc_call_ops nfs41_call_sync_ops = {
.rpc_call_done = nfs41_call_sync_done,
};
+static void
+nfs4_sequence_process_interrupted(struct nfs_client *client,
+ struct nfs4_slot *slot, struct rpc_cred *cred)
+{
+ struct rpc_task *task;
+
+ task = _nfs41_proc_sequence(client, cred, slot, true);
+ if (!IS_ERR(task))
+ rpc_put_task_async(task);
+}
+
#else /* !CONFIG_NFS_V4_1 */
static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
@@ -877,9 +897,34 @@ int nfs4_sequence_done(struct rpc_task *task,
}
EXPORT_SYMBOL_GPL(nfs4_sequence_done);
+static void
+nfs4_sequence_process_interrupted(struct nfs_client *client,
+ struct nfs4_slot *slot, struct rpc_cred *cred)
+{
+ WARN_ON_ONCE(1);
+ slot->interrupted = 0;
+}
+
#endif /* !CONFIG_NFS_V4_1 */
-int nfs4_setup_sequence(const struct nfs_client *client,
+static
+void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
+ struct nfs4_sequence_res *res,
+ struct nfs4_slot *slot)
+{
+ if (!slot)
+ return;
+ slot->privileged = args->sa_privileged ? 1 : 0;
+ args->sa_slot = slot;
+
+ res->sr_slot = slot;
+ res->sr_timestamp = jiffies;
+ res->sr_status_flags = 0;
+ res->sr_status = 1;
+
+}
+
+int nfs4_setup_sequence(struct nfs_client *client,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
struct rpc_task *task)
@@ -897,29 +942,28 @@ int nfs4_setup_sequence(const struct nfs_client *client,
task->tk_timeout = 0;
}
- spin_lock(&tbl->slot_tbl_lock);
- /* The state manager will wait until the slot table is empty */
- if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
- goto out_sleep;
+ for (;;) {
+ spin_lock(&tbl->slot_tbl_lock);
+ /* The state manager will wait until the slot table is empty */
+ if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
+ goto out_sleep;
+
+ slot = nfs4_alloc_slot(tbl);
+ if (IS_ERR(slot)) {
+ /* Try again in 1/4 second */
+ if (slot == ERR_PTR(-ENOMEM))
+ task->tk_timeout = HZ >> 2;
+ goto out_sleep;
+ }
+ spin_unlock(&tbl->slot_tbl_lock);
- slot = nfs4_alloc_slot(tbl);
- if (IS_ERR(slot)) {
- /* Try again in 1/4 second */
- if (slot == ERR_PTR(-ENOMEM))
- task->tk_timeout = HZ >> 2;
- goto out_sleep;
+ if (likely(!slot->interrupted))
+ break;
+ nfs4_sequence_process_interrupted(client,
+ slot, task->tk_msg.rpc_cred);
}
- spin_unlock(&tbl->slot_tbl_lock);
-
- slot->privileged = args->sa_privileged ? 1 : 0;
- args->sa_slot = slot;
- res->sr_slot = slot;
- if (session) {
- res->sr_timestamp = jiffies;
- res->sr_status_flags = 0;
- res->sr_status = 1;
- }
+ nfs4_sequence_attach_slot(args, res, slot);
trace_nfs4_setup_sequence(session, args);
out_start:
@@ -8118,6 +8162,7 @@ static const struct rpc_call_ops nfs41_sequence_ops = {
static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
struct rpc_cred *cred,
+ struct nfs4_slot *slot,
bool is_privileged)
{
struct nfs4_sequence_data *calldata;
@@ -8131,15 +8176,18 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
.callback_ops = &nfs41_sequence_ops,
.flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
};
+ struct rpc_task *ret;
+ ret = ERR_PTR(-EIO);
if (!atomic_inc_not_zero(&clp->cl_count))
- return ERR_PTR(-EIO);
+ goto out_err;
+
+ ret = ERR_PTR(-ENOMEM);
calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
- if (calldata == NULL) {
- nfs_put_client(clp);
- return ERR_PTR(-ENOMEM);
- }
+ if (calldata == NULL)
+ goto out_put_clp;
nfs4_init_sequence(&calldata->args, &calldata->res, 0);
+ nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
if (is_privileged)
nfs4_set_sequence_privileged(&calldata->args);
msg.rpc_argp = &calldata->args;
@@ -8147,7 +8195,15 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
calldata->clp = clp;
task_setup_data.callback_data = calldata;
- return rpc_run_task(&task_setup_data);
+ ret = rpc_run_task(&task_setup_data);
+ if (IS_ERR(ret))
+ goto out_err;
+ return ret;
+out_put_clp:
+ nfs_put_client(clp);
+out_err:
+ nfs41_release_slot(slot);
+ return ret;
}
static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
@@ -8157,7 +8213,7 @@ static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cr
if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
return -EAGAIN;
- task = _nfs41_proc_sequence(clp, cred, false);
+ task = _nfs41_proc_sequence(clp, cred, NULL, false);
if (IS_ERR(task))
ret = PTR_ERR(task);
else
@@ -8171,7 +8227,7 @@ static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
struct rpc_task *task;
int ret;
- task = _nfs41_proc_sequence(clp, cred, true);
+ task = _nfs41_proc_sequence(clp, cred, NULL, true);
if (IS_ERR(task)) {
ret = PTR_ERR(task);
goto out;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 06:50:48 +0000