nfs41: check SEQUENCE status flag
the server can indicate a number of error conditions by setting the
appropriate bits in the SEQUENCE operation. The client re-establishes
state with the server when it receives one of those, with the action
depending on the specific case.
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 0d25a82..9a86636 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -270,6 +270,7 @@
extern void nfs4_schedule_state_recovery(struct nfs_client *);
extern void nfs4_schedule_state_manager(struct nfs_client *);
extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state);
+extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d897b9e..71993f1 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -405,6 +405,8 @@
if (time_before(clp->cl_last_renewal, timestamp))
clp->cl_last_renewal = timestamp;
spin_unlock(&clp->cl_lock);
+ /* Check sequence flags */
+ nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
return;
}
out:
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 46c69e2..a86f3ac 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1173,6 +1173,28 @@
}
#ifdef CONFIG_NFS_V4_1
+void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
+{
+ if (!flags)
+ return;
+ else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) {
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ nfs4_state_start_reclaim_reboot(clp);
+ nfs4_schedule_state_recovery(clp);
+ } else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED |
+ SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED |
+ SEQ4_STATUS_ADMIN_STATE_REVOKED |
+ SEQ4_STATUS_RECALLABLE_STATE_REVOKED |
+ SEQ4_STATUS_LEASE_MOVED)) {
+ set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+ nfs4_state_start_reclaim_nograce(clp);
+ nfs4_schedule_state_recovery(clp);
+ } else if (flags & (SEQ4_STATUS_CB_PATH_DOWN |
+ SEQ4_STATUS_BACKCHANNEL_FAULT |
+ SEQ4_STATUS_CB_PATH_DOWN_SESSION))
+ nfs_expire_all_delegations(clp);
+}
+
static void nfs4_session_recovery_handle_error(struct nfs_client *clp, int err)
{
switch (err) {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 4ddd04a..f740472 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4614,8 +4614,8 @@
dummy = be32_to_cpup(p++);
/* target highest slot id - currently not processed */
dummy = be32_to_cpup(p++);
- /* result flags - currently not processed */
- dummy = be32_to_cpup(p);
+ /* result flags */
+ res->sr_status_flags = be32_to_cpup(p);
status = 0;
out_err:
res->sr_status = status;