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NFS: Check if the slot table is draining from nfs4_setup_sequence() 

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Anna Schumaker 2017-01-10 16:49:31 -05:00
parent 0dcee8bb74
commit 76ee03540f
1 changed files with 9 additions and 14 deletions
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23
fs/nfs/nfs4proc.c
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@ -629,9 +629,6 @@ static int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
{
struct nfs4_slot *slot;
if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
return -EAGAIN;
slot = nfs4_alloc_slot(tbl);
if (IS_ERR(slot)) {
if (slot == ERR_PTR(-ENOMEM))
@ -874,15 +871,6 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
dprintk("--> %s\n", __func__);
tbl = &session->fc_slot_table;
task->tk_timeout = 0;
if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
!args->sa_privileged) {
/* The state manager will wait until the slot table is empty */
dprintk("%s session is draining\n", __func__);
return -EAGAIN;
}
slot = nfs4_alloc_slot(tbl);
if (IS_ERR(slot)) {
/* If out of memory, try again in 1/4 second */
@ -960,15 +948,22 @@ int nfs4_setup_sequence(const struct nfs_client *client,
struct rpc_task *task)
{
struct nfs4_session *session = nfs4_get_session(client);
struct nfs4_slot_table *tbl = session ? &session->fc_slot_table :
client->cl_slot_tbl;
struct nfs4_slot_table *tbl = client->cl_slot_tbl;
int ret;
/* slot already allocated? */
if (res->sr_slot != NULL)
goto out_start;
if (session) {
tbl = &session->fc_slot_table;
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;
#if defined(CONFIG_NFS_V4_1)
if (session)