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authorAnna Schumaker <Anna.Schumaker@Netapp.com>2017-01-10 16:29:54 -0500
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-01-30 13:14:50 -0500
commit0dcee8bb749e5de43b180ccfcb0c5005aa529c92 (patch)
treed0e705e8b4891691be79deb80b41c6a1e2d311b6 /fs
parent6994cdd798568a0ddb8e0a85e2af24dbe655c341 (diff)
downloadop-kernel-dev-0dcee8bb749e5de43b180ccfcb0c5005aa529c92.zip
op-kernel-dev-0dcee8bb749e5de43b180ccfcb0c5005aa529c92.tar.gz
NFS: Handle setup sequence task rescheduling in a single place
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4proc.c37
1 files changed, 15 insertions, 22 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 681cb5e..9759d6f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -630,27 +630,19 @@ static int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
struct nfs4_slot *slot;
if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
- goto out_sleep;
+ return -EAGAIN;
slot = nfs4_alloc_slot(tbl);
if (IS_ERR(slot)) {
if (slot == ERR_PTR(-ENOMEM))
task->tk_timeout = HZ >> 2;
- goto out_sleep;
+ return -EAGAIN;
}
slot->privileged = args->sa_privileged ? 1 : 0;
args->sa_slot = slot;
res->sr_slot = slot;
return 0;
-
-out_sleep:
- if (args->sa_privileged)
- rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
- NULL, RPC_PRIORITY_PRIVILEGED);
- else
- rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
- return -EAGAIN;
}
static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
@@ -888,7 +880,7 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
!args->sa_privileged) {
/* The state manager will wait until the slot table is empty */
dprintk("%s session is draining\n", __func__);
- goto out_sleep;
+ return -EAGAIN;
}
slot = nfs4_alloc_slot(tbl);
@@ -897,7 +889,7 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
if (slot == ERR_PTR(-ENOMEM))
task->tk_timeout = HZ >> 2;
dprintk("<-- %s: no free slots\n", __func__);
- goto out_sleep;
+ return -EAGAIN;
}
slot->privileged = args->sa_privileged ? 1 : 0;
@@ -916,14 +908,6 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
res->sr_status = 1;
trace_nfs4_setup_sequence(session, args);
return 0;
-out_sleep:
- /* Privileged tasks are queued with top priority */
- if (args->sa_privileged)
- rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
- NULL, RPC_PRIORITY_PRIVILEGED);
- else
- rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
- return -EAGAIN;
}
static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
@@ -993,13 +977,22 @@ int nfs4_setup_sequence(const struct nfs_client *client,
#endif /* CONFIG_NFS_V4_1 */
ret = nfs40_setup_sequence(client->cl_slot_tbl, args, res, task);
+ if (ret == -EAGAIN)
+ goto out_sleep;
spin_unlock(&tbl->slot_tbl_lock);
- if (ret < 0)
- return ret;
out_start:
rpc_call_start(task);
return 0;
+
+out_sleep:
+ if (args->sa_privileged)
+ rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
+ NULL, RPC_PRIORITY_PRIVILEGED);
+ else
+ rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
+ spin_unlock(&tbl->slot_tbl_lock);
+ return -EAGAIN;
}
EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
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