NFSv4: Clean up delegation recall error handling

Unify the error handling in nfs4_open_delegation_recall and
nfs4_lock_delegation_recall.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 6390a4b..fc8a213 100644 (file)
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -64,7 +64,7 @@ int nfs4_have_delegation(struct inode *inode, fmode_t flags)
        return ret;
 }
 
-static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state)
+static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
 {
        struct inode *inode = state->inode;
        struct file_lock *fl;
@@ -83,7 +83,7 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
                if (nfs_file_open_context(fl->fl_file) != ctx)
                        continue;
                unlock_flocks();
-               status = nfs4_lock_delegation_recall(state, fl);
+               status = nfs4_lock_delegation_recall(fl, state, stateid);
                if (status < 0)
                        goto out;
                lock_flocks();
@@ -120,7 +120,7 @@ again:
                seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
                err = nfs4_open_delegation_recall(ctx, state, stateid);
                if (!err)
-                       err = nfs_delegation_claim_locks(ctx, state);
+                       err = nfs_delegation_claim_locks(ctx, state, stateid);
                if (!err && read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
                        err = -EAGAIN;
                mutex_unlock(&sp->so_delegreturn_mutex);

diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index d54d4fc..88573d1 100644 (file)
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -53,7 +53,7 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
 /* NFSv4 delegation-related procedures */
 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync);
 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
-int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
+int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid);
 bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags);
 
 void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 57b5fb7..bdf3d07 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1379,19 +1379,8 @@ static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *sta
        return ret;
 }
 
-int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
+static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
 {
-       struct nfs_server *server = NFS_SERVER(state->inode);
-       struct nfs4_opendata *opendata;
-       int err;
-
-       opendata = nfs4_open_recoverdata_alloc(ctx, state,
-                       NFS4_OPEN_CLAIM_DELEG_CUR_FH);
-       if (IS_ERR(opendata))
-               return PTR_ERR(opendata);
-       nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
-       err = nfs4_open_recover(opendata, state);
-       nfs4_opendata_put(opendata);
        switch (err) {
                default:
                        printk(KERN_ERR "NFS: %s: unhandled error "
@@ -1418,20 +1407,40 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state
                case -NFS4ERR_DELEG_REVOKED:
                case -NFS4ERR_ADMIN_REVOKED:
                case -NFS4ERR_BAD_STATEID:
+               case -NFS4ERR_OPENMODE:
                        nfs_inode_find_state_and_recover(state->inode,
                                        stateid);
                        nfs4_schedule_stateid_recovery(server, state);
-               case -ENOMEM:
                        return 0;
                case -NFS4ERR_DELAY:
                case -NFS4ERR_GRACE:
                        set_bit(NFS_DELEGATED_STATE, &state->flags);
                        ssleep(1);
                        return -EAGAIN;
+               case -ENOMEM:
+               case -NFS4ERR_DENIED:
+                       /* kill_proc(fl->fl_pid, SIGLOST, 1); */
+                       return 0;
        }
        return err;
 }
 
+int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
+{
+       struct nfs_server *server = NFS_SERVER(state->inode);
+       struct nfs4_opendata *opendata;
+       int err;
+
+       opendata = nfs4_open_recoverdata_alloc(ctx, state,
+                       NFS4_OPEN_CLAIM_DELEG_CUR_FH);
+       if (IS_ERR(opendata))
+               return PTR_ERR(opendata);
+       nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
+       err = nfs4_open_recover(opendata, state);
+       nfs4_opendata_put(opendata);
+       return nfs4_handle_delegation_recall_error(server, state, stateid, err);
+}
+
 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
 {
        struct nfs4_opendata *data = calldata;
@@ -5127,54 +5136,16 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
        return status;
 }
 
-int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
+int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
 {
        struct nfs_server *server = NFS_SERVER(state->inode);
        int err;
 
        err = nfs4_set_lock_state(state, fl);
        if (err != 0)
-               goto out;
+               return err;
        err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
-       switch (err) {
-               default:
-                       printk(KERN_ERR "NFS: %s: unhandled error "
-                               "%d.\n", __func__, err);
-               case 0:
-               case -ESTALE:
-                       goto out;
-               case -NFS4ERR_STALE_CLIENTID:
-               case -NFS4ERR_STALE_STATEID:
-                       set_bit(NFS_DELEGATED_STATE, &state->flags);
-               case -NFS4ERR_EXPIRED:
-                       nfs4_schedule_lease_recovery(server->nfs_client);
-                       return -EAGAIN;
-               case -NFS4ERR_BADSESSION:
-               case -NFS4ERR_BADSLOT:
-               case -NFS4ERR_BAD_HIGH_SLOT:
-               case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
-               case -NFS4ERR_DEADSESSION:
-                       set_bit(NFS_DELEGATED_STATE, &state->flags);
-                       nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
-                       return -EAGAIN;
-               case -NFS4ERR_DELEG_REVOKED:
-               case -NFS4ERR_ADMIN_REVOKED:
-               case -NFS4ERR_BAD_STATEID:
-               case -NFS4ERR_OPENMODE:
-                       nfs4_schedule_stateid_recovery(server, state);
-                       return 0;
-               case -NFS4ERR_DELAY:
-               case -NFS4ERR_GRACE:
-                       set_bit(NFS_DELEGATED_STATE, &state->flags);
-                       ssleep(1);
-                       return -EAGAIN;
-               case -ENOMEM:
-               case -NFS4ERR_DENIED:
-                       /* kill_proc(fl->fl_pid, SIGLOST, 1); */
-                       return 0;
-       }
-out:
-       return err;
+       return nfs4_handle_delegation_recall_error(server, state, stateid, err);
 }
 
 struct nfs_release_lockowner_data {