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nfs: run state manager in privileged mode

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Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Alexandros Batsakis 2009-12-14 21:27:58 -08:00 committed by Trond Myklebust
parent b257957e50
commit 5601a00d67
2 changed files with 16 additions and 21 deletions
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3
fs/nfs/nfs4proc.c
View file

@ -477,7 +477,8 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
tbl = &session->fc_slot_table;
spin_lock(&tbl->slot_tbl_lock);
if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
!rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
/*
* The state manager will wait until the slot table is empty.
* Schedule the reset thread

34
fs/nfs/nfs4state.c
View file

@ -135,9 +135,9 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp)
return status;
}
static void nfs41_end_drain_session(struct nfs_client *clp,
struct nfs4_session *ses)
static void nfs4_end_drain_session(struct nfs_client *clp)
{
struct nfs4_session *ses = clp->cl_session;
int max_slots;
if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
@ -156,9 +156,9 @@ static void nfs41_end_drain_session(struct nfs_client *clp,
}
}
static int nfs41_begin_drain_session(struct nfs_client *clp,
struct nfs4_session *ses)
static int nfs4_begin_drain_session(struct nfs_client *clp)
{
struct nfs4_session *ses = clp->cl_session;
struct nfs4_slot_table *tbl = &ses->fc_slot_table;
spin_lock(&tbl->slot_tbl_lock);
@ -176,16 +176,12 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
{
int status;
status = nfs41_begin_drain_session(clp, clp->cl_session);
if (status != 0)
goto out;
status = nfs4_proc_exchange_id(clp, cred);
if (status != 0)
goto out;
status = nfs4_proc_create_session(clp);
if (status != 0)
goto out;
nfs41_end_drain_session(clp, clp->cl_session);
nfs41_setup_state_renewal(clp);
nfs_mark_client_ready(clp, NFS_CS_READY);
out:
@ -1271,13 +1267,8 @@ void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
static int nfs4_reset_session(struct nfs_client *clp)
{
struct nfs4_session *ses = clp->cl_session;
int status;
status = nfs41_begin_drain_session(clp, ses);
if (status != 0)
return status;
status = nfs4_proc_destroy_session(clp->cl_session);
if (status && status != -NFS4ERR_BADSESSION &&
status != -NFS4ERR_DEADSESSION) {
@ -1293,19 +1284,18 @@ static int nfs4_reset_session(struct nfs_client *clp)
out:
/*
* Let the state manager reestablish state
* without waking other tasks yet.
*/
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
/* Wake up the next rpc task */
nfs41_end_drain_session(clp, ses);
if (status == 0)
nfs41_setup_state_renewal(clp);
}
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
status == 0)
nfs41_setup_state_renewal(clp);
return status;
}
#else /* CONFIG_NFS_V4_1 */
static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
static int nfs4_begin_drain_session(struct nfs_client *clp) { return 0; }
static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; }
#endif /* CONFIG_NFS_V4_1 */
/* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
@ -1337,6 +1327,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
for(;;) {
if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
/* We're going to have to re-establish a clientid */
nfs4_begin_drain_session(clp);
status = nfs4_reclaim_lease(clp);
if (status) {
nfs4_set_lease_expired(clp, status);
@ -1363,6 +1354,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
/* Initialize or reset the session */
if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)
&& nfs4_has_session(clp)) {
nfs4_begin_drain_session(clp);
status = nfs4_reset_session(clp);
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
continue;
@ -1396,6 +1388,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
goto out_error;
}
nfs4_end_drain_session(clp);
if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
nfs_client_return_marked_delegations(clp);
continue;
@ -1412,6 +1405,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
out_error:
printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
" with error %d\n", clp->cl_hostname, -status);
nfs4_end_drain_session(clp);
nfs4_clear_state_manager_bit(clp);
}