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-rw-r--r--fs/nfs/nfs4state.c153
1 files changed, 135 insertions, 18 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 0b2a19bfe5a0..b73c5a728655 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -60,7 +60,7 @@ const nfs4_stateid zero_stateid;
static LIST_HEAD(nfs4_clientid_list);
-static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
+int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
{
unsigned short port;
int status;
@@ -77,7 +77,7 @@ static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
return status;
}
-static struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp)
+struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp)
{
struct rpc_cred *cred = NULL;
@@ -114,17 +114,21 @@ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp)
return cred;
}
-static struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
+#if defined(CONFIG_NFS_V4_1)
+
+struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp)
{
struct rpc_cred *cred;
spin_lock(&clp->cl_lock);
- cred = nfs4_get_renew_cred_locked(clp);
+ cred = nfs4_get_machine_cred_locked(clp);
spin_unlock(&clp->cl_lock);
return cred;
}
-static struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
+#endif /* CONFIG_NFS_V4_1 */
+
+struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
struct rb_node *pos;
@@ -738,12 +742,14 @@ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid)
{
- if (status == -NFS4ERR_BAD_SEQID) {
- struct nfs4_state_owner *sp = container_of(seqid->sequence,
- struct nfs4_state_owner, so_seqid);
+ struct nfs4_state_owner *sp = container_of(seqid->sequence,
+ struct nfs4_state_owner, so_seqid);
+ struct nfs_server *server = sp->so_server;
+
+ if (status == -NFS4ERR_BAD_SEQID)
nfs4_drop_state_owner(sp);
- }
- nfs_increment_seqid(status, seqid);
+ if (!nfs4_has_session(server->nfs_client))
+ nfs_increment_seqid(status, seqid);
}
/*
@@ -1059,6 +1065,14 @@ static void nfs4_recovery_handle_error(struct nfs_client *clp, int error)
case -NFS4ERR_EXPIRED:
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
nfs4_state_start_reclaim_nograce(clp);
+ case -NFS4ERR_BADSESSION:
+ case -NFS4ERR_BADSLOT:
+ case -NFS4ERR_BAD_HIGH_SLOT:
+ case -NFS4ERR_DEADSESSION:
+ case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
+ case -NFS4ERR_SEQ_FALSE_RETRY:
+ case -NFS4ERR_SEQ_MISORDERED:
+ set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
}
}
@@ -1092,18 +1106,22 @@ restart:
static int nfs4_check_lease(struct nfs_client *clp)
{
struct rpc_cred *cred;
+ struct nfs4_state_maintenance_ops *ops =
+ nfs4_state_renewal_ops[clp->cl_minorversion];
int status = -NFS4ERR_EXPIRED;
/* Is the client already known to have an expired lease? */
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
return 0;
- cred = nfs4_get_renew_cred(clp);
+ spin_lock(&clp->cl_lock);
+ cred = ops->get_state_renewal_cred_locked(clp);
+ spin_unlock(&clp->cl_lock);
if (cred == NULL) {
cred = nfs4_get_setclientid_cred(clp);
if (cred == NULL)
goto out;
}
- status = nfs4_proc_renew(clp, cred);
+ status = ops->renew_lease(clp, cred);
put_rpccred(cred);
out:
nfs4_recovery_handle_error(clp, status);
@@ -1113,21 +1131,98 @@ out:
static int nfs4_reclaim_lease(struct nfs_client *clp)
{
struct rpc_cred *cred;
+ struct nfs4_state_recovery_ops *ops =
+ nfs4_reboot_recovery_ops[clp->cl_minorversion];
int status = -ENOENT;
- cred = nfs4_get_setclientid_cred(clp);
+ cred = ops->get_clid_cred(clp);
if (cred != NULL) {
- status = nfs4_init_client(clp, cred);
+ status = ops->establish_clid(clp, cred);
put_rpccred(cred);
/* Handle case where the user hasn't set up machine creds */
if (status == -EACCES && cred == clp->cl_machine_cred) {
nfs4_clear_machine_cred(clp);
status = -EAGAIN;
}
+ if (status == -NFS4ERR_MINOR_VERS_MISMATCH)
+ status = -EPROTONOSUPPORT;
}
return status;
}
+#ifdef CONFIG_NFS_V4_1
+static void nfs4_session_recovery_handle_error(struct nfs_client *clp, int err)
+{
+ switch (err) {
+ case -NFS4ERR_STALE_CLIENTID:
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
+ }
+}
+
+static int nfs4_reset_session(struct nfs_client *clp)
+{
+ int status;
+
+ status = nfs4_proc_destroy_session(clp->cl_session);
+ if (status && status != -NFS4ERR_BADSESSION &&
+ status != -NFS4ERR_DEADSESSION) {
+ nfs4_session_recovery_handle_error(clp, status);
+ goto out;
+ }
+
+ memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN);
+ status = nfs4_proc_create_session(clp, 1);
+ if (status)
+ nfs4_session_recovery_handle_error(clp, status);
+ /* fall through*/
+out:
+ /* Wake up the next rpc task even on error */
+ rpc_wake_up_next(&clp->cl_session->fc_slot_table.slot_tbl_waitq);
+ return status;
+}
+
+static int nfs4_initialize_session(struct nfs_client *clp)
+{
+ int status;
+
+ status = nfs4_proc_create_session(clp, 0);
+ if (!status) {
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ } else if (status == -NFS4ERR_STALE_CLIENTID) {
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
+ } else {
+ nfs_mark_client_ready(clp, status);
+ }
+ return status;
+}
+#else /* CONFIG_NFS_V4_1 */
+static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
+static int nfs4_initialize_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
+ * on EXCHANGE_ID for v4.1
+ */
+static void nfs4_set_lease_expired(struct nfs_client *clp, int status)
+{
+ if (nfs4_has_session(clp)) {
+ switch (status) {
+ case -NFS4ERR_DELAY:
+ case -NFS4ERR_CLID_INUSE:
+ case -EAGAIN:
+ break;
+
+ case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
+ * in nfs4_exchange_id */
+ default:
+ return;
+ }
+ }
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+}
+
static void nfs4_state_manager(struct nfs_client *clp)
{
int status = 0;
@@ -1138,9 +1233,12 @@ static void nfs4_state_manager(struct nfs_client *clp)
/* We're going to have to re-establish a clientid */
status = nfs4_reclaim_lease(clp);
if (status) {
- set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ nfs4_set_lease_expired(clp, status);
if (status == -EAGAIN)
continue;
+ if (clp->cl_cons_state ==
+ NFS_CS_SESSION_INITING)
+ nfs_mark_client_ready(clp, status);
goto out_error;
}
clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
@@ -1151,25 +1249,44 @@ static void nfs4_state_manager(struct nfs_client *clp)
if (status != 0)
continue;
}
-
+ /* Initialize or reset the session */
+ if (nfs4_has_session(clp) &&
+ test_and_clear_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) {
+ if (clp->cl_cons_state == NFS_CS_SESSION_INITING)
+ status = nfs4_initialize_session(clp);
+ else
+ status = nfs4_reset_session(clp);
+ if (status) {
+ if (status == -NFS4ERR_STALE_CLIENTID)
+ continue;
+ goto out_error;
+ }
+ }
/* First recover reboot state... */
if (test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
- status = nfs4_do_reclaim(clp, &nfs4_reboot_recovery_ops);
+ status = nfs4_do_reclaim(clp,
+ nfs4_reboot_recovery_ops[clp->cl_minorversion]);
if (status == -NFS4ERR_STALE_CLIENTID)
continue;
+ if (test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
+ continue;
nfs4_state_end_reclaim_reboot(clp);
continue;
}
/* Now recover expired state... */
if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
- status = nfs4_do_reclaim(clp, &nfs4_nograce_recovery_ops);
+ status = nfs4_do_reclaim(clp,
+ nfs4_nograce_recovery_ops[clp->cl_minorversion]);
if (status < 0) {
set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
if (status == -NFS4ERR_STALE_CLIENTID)
continue;
if (status == -NFS4ERR_EXPIRED)
continue;
+ if (test_bit(NFS4CLNT_SESSION_SETUP,
+ &clp->cl_state))
+ continue;
goto out_error;
} else
nfs4_state_end_reclaim_nograce(clp);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.