NFSv4.1: Simplify the sequence setup

Nobody calls nfs4_setup_sequence or nfs41_setup_sequence without
also calling rpc_call_start() on success. This commit therefore
folds the rpc_call_start call into nfs41_setup_sequence().

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

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 8fe155ba16d1a30d263a3b2d78c12758562b0339..8022adec34cd3355272549a2cb7032016a6a6104 100644 (file)
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -273,6 +273,7 @@ static inline int nfs4_setup_sequence(const struct nfs_server *server,
                struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
                struct rpc_task *task)
 {
+       rpc_call_start(task);
        return 0;
 }
 

diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 591a1a7f8f948cb8eaebc10256843a824e88305a..1e42413fab8f3c628e19c34f2fba17248699c586 100644 (file)
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -307,12 +307,10 @@ static void filelayout_read_prepare(struct rpc_task *task, void *data)
        }
        rdata->read_done_cb = filelayout_read_done_cb;
 
-       if (nfs41_setup_sequence(rdata->ds_clp->cl_session,
-                               &rdata->args.seq_args, &rdata->res.seq_res,
-                               task))
-               return;
-
-       rpc_call_start(task);
+       nfs41_setup_sequence(rdata->ds_clp->cl_session,
+                       &rdata->args.seq_args,
+                       &rdata->res.seq_res,
+                       task);
 }
 
 static void filelayout_read_call_done(struct rpc_task *task, void *data)
@@ -409,12 +407,10 @@ static void filelayout_write_prepare(struct rpc_task *task, void *data)
                rpc_exit(task, 0);
                return;
        }
-       if (nfs41_setup_sequence(wdata->ds_clp->cl_session,
-                               &wdata->args.seq_args, &wdata->res.seq_res,
-                               task))
-               return;
-
-       rpc_call_start(task);
+       nfs41_setup_sequence(wdata->ds_clp->cl_session,
+                       &wdata->args.seq_args,
+                       &wdata->res.seq_res,
+                       task);
 }
 
 static void filelayout_write_call_done(struct rpc_task *task, void *data)
@@ -450,12 +446,10 @@ static void filelayout_commit_prepare(struct rpc_task *task, void *data)
 {
        struct nfs_commit_data *wdata = data;
 
-       if (nfs41_setup_sequence(wdata->ds_clp->cl_session,
-                               &wdata->args.seq_args, &wdata->res.seq_res,
-                               task))
-               return;
-
-       rpc_call_start(task);
+       nfs41_setup_sequence(wdata->ds_clp->cl_session,
+                       &wdata->args.seq_args,
+                       &wdata->res.seq_res,
+                       task);
 }
 
 static void filelayout_write_commit_done(struct rpc_task *task, void *data)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 39d24158f97f3a2ebb2e82f85f389c5b739ef67a..23b0c2fcb052e3707c34be1ea7d4f95fcf3ec0ae 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -513,7 +513,7 @@ int nfs41_setup_sequence(struct nfs4_session *session,
        dprintk("--> %s\n", __func__);
        /* slot already allocated? */
        if (res->sr_slot != NULL)
-               return 0;
+               goto out_success;
 
        tbl = &session->fc_slot_table;
 
@@ -563,6 +563,8 @@ int nfs41_setup_sequence(struct nfs4_session *session,
         * set to 1 if an rpc level failure occurs.
         */
        res->sr_status = 1;
+out_success:
+       rpc_call_start(task);
        return 0;
 }
 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
@@ -575,8 +577,10 @@ int nfs4_setup_sequence(const struct nfs_server *server,
        struct nfs4_session *session = nfs4_get_session(server);
        int ret = 0;
 
-       if (session == NULL)
+       if (session == NULL) {
+               rpc_call_start(task);
                goto out;
+       }
 
        dprintk("--> %s clp %p session %p sr_slot %d\n",
                __func__, session->clp, session, res->sr_slot ?
@@ -601,10 +605,7 @@ static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
 
        dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
 
-       if (nfs41_setup_sequence(session, data->seq_args,
-                               data->seq_res, task))
-               return;
-       rpc_call_start(task);
+       nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
 }
 
 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
@@ -1485,8 +1486,6 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
                                &data->o_res.seq_res,
                                task) != 0)
                nfs_release_seqid(data->o_arg.seqid);
-       else
-               rpc_call_start(task);
        return;
 unlock_no_action:
        rcu_read_unlock();
@@ -2192,8 +2191,6 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
                                &calldata->res.seq_res,
                                task) != 0)
                nfs_release_seqid(calldata->arg.seqid);
-       else
-               rpc_call_start(task);
 out:
        dprintk("%s: done!\n", __func__);
 }
@@ -2932,12 +2929,10 @@ static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 
 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 {
-       if (nfs4_setup_sequence(NFS_SERVER(data->dir),
-                               &data->args.seq_args,
-                               &data->res.seq_res,
-                               task))
-               return;
-       rpc_call_start(task);
+       nfs4_setup_sequence(NFS_SERVER(data->dir),
+                       &data->args.seq_args,
+                       &data->res.seq_res,
+                       task);
 }
 
 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
@@ -2965,12 +2960,10 @@ static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 
 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 {
-       if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
-                               &data->args.seq_args,
-                               &data->res.seq_res,
-                               task))
-               return;
-       rpc_call_start(task);
+       nfs4_setup_sequence(NFS_SERVER(data->old_dir),
+                       &data->args.seq_args,
+                       &data->res.seq_res,
+                       task);
 }
 
 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
@@ -3459,12 +3452,10 @@ static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message
 
 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
 {
-       if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
-                               &data->args.seq_args,
-                               &data->res.seq_res,
-                               task))
-               return;
-       rpc_call_start(task);
+       nfs4_setup_sequence(NFS_SERVER(data->header->inode),
+                       &data->args.seq_args,
+                       &data->res.seq_res,
+                       task);
 }
 
 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
@@ -3525,22 +3516,18 @@ static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_messag
 
 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
 {
-       if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
-                               &data->args.seq_args,
-                               &data->res.seq_res,
-                               task))
-               return;
-       rpc_call_start(task);
+       nfs4_setup_sequence(NFS_SERVER(data->header->inode),
+                       &data->args.seq_args,
+                       &data->res.seq_res,
+                       task);
 }
 
 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 {
-       if (nfs4_setup_sequence(NFS_SERVER(data->inode),
-                               &data->args.seq_args,
-                               &data->res.seq_res,
-                               task))
-               return;
-       rpc_call_start(task);
+       nfs4_setup_sequence(NFS_SERVER(data->inode),
+                       &data->args.seq_args,
+                       &data->res.seq_res,
+                       task);
 }
 
 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
@@ -4187,11 +4174,10 @@ static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
 
        d_data = (struct nfs4_delegreturndata *)data;
 
-       if (nfs4_setup_sequence(d_data->res.server,
-                               &d_data->args.seq_args,
-                               &d_data->res.seq_res, task))
-               return;
-       rpc_call_start(task);
+       nfs4_setup_sequence(d_data->res.server,
+                       &d_data->args.seq_args,
+                       &d_data->res.seq_res,
+                       task);
 }
 #endif /* CONFIG_NFS_V4_1 */
 
@@ -4445,8 +4431,6 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data)
                                &calldata->res.seq_res,
                                task) != 0)
                nfs_release_seqid(calldata->arg.seqid);
-       else
-               rpc_call_start(task);
 }
 
 static const struct rpc_call_ops nfs4_locku_ops = {
@@ -4601,10 +4585,8 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
        if (nfs4_setup_sequence(data->server,
                                &data->arg.seq_args,
                                &data->res.seq_res,
-                               task) == 0) {
-               rpc_call_start(task);
+                               task) == 0)
                return;
-       }
        nfs_release_seqid(data->arg.open_seqid);
 out_release_lock_seqid:
        nfs_release_seqid(data->arg.lock_seqid);
@@ -5462,7 +5444,6 @@ struct nfs4_get_lease_time_data {
 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
                                        void *calldata)
 {
-       int ret;
        struct nfs4_get_lease_time_data *data =
                        (struct nfs4_get_lease_time_data *)calldata;
 
@@ -5470,12 +5451,10 @@ static void nfs4_get_lease_time_prepare(struct rpc_task *task,
        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
        /* just setup sequence, do not trigger session recovery
           since we're invoked within one */
-       ret = nfs41_setup_sequence(data->clp->cl_session,
-                                  &data->args->la_seq_args,
-                                  &data->res->lr_seq_res, task);
-
-       if (ret != -EAGAIN)
-               rpc_call_start(task);
+       nfs41_setup_sequence(data->clp->cl_session,
+                       &data->args->la_seq_args,
+                       &data->res->lr_seq_res,
+                       task);
        dprintk("<-- %s\n", __func__);
 }
 
@@ -5809,9 +5788,7 @@ static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
        args = task->tk_msg.rpc_argp;
        res = task->tk_msg.rpc_resp;
 
-       if (nfs41_setup_sequence(clp->cl_session, args, res, task))
-               return;
-       rpc_call_start(task);
+       nfs41_setup_sequence(clp->cl_session, args, res, task);
 }
 
 static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
@@ -5914,12 +5891,10 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
        struct nfs4_reclaim_complete_data *calldata = data;
 
        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
-       if (nfs41_setup_sequence(calldata->clp->cl_session,
-                               &calldata->arg.seq_args,
-                               &calldata->res.seq_res, task))
-               return;
-
-       rpc_call_start(task);
+       nfs41_setup_sequence(calldata->clp->cl_session,
+                       &calldata->arg.seq_args,
+                       &calldata->res.seq_res,
+                       task);
 }
 
 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
@@ -6034,9 +6009,7 @@ nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
                                          NFS_I(lgp->args.inode)->layout,
                                          lgp->args.ctx->state)) {
                rpc_exit(task, NFS4_OK);
-               return;
        }
-       rpc_call_start(task);
 }
 
 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
@@ -6200,10 +6173,10 @@ nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
        struct nfs4_layoutreturn *lrp = calldata;
 
        dprintk("--> %s\n", __func__);
-       if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
-                               &lrp->res.seq_res, task))
-               return;
-       rpc_call_start(task);
+       nfs41_setup_sequence(lrp->clp->cl_session,
+                       &lrp->args.seq_args,
+                       &lrp->res.seq_res,
+                       task);
 }
 
 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
@@ -6364,10 +6337,10 @@ static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
        struct nfs_server *server = NFS_SERVER(data->args.inode);
        struct nfs4_session *session = nfs4_get_session(server);
 
-       if (nfs41_setup_sequence(session, &data->args.seq_args,
-                               &data->res.seq_res, task))
-               return;
-       rpc_call_start(task);
+       nfs41_setup_sequence(session,
+                       &data->args.seq_args,
+                       &data->res.seq_res,
+                       task);
 }
 
 static void