SUNRPC: Cleanup of rpc_task initialisation

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

7 files changed, 117 insertions, 58 deletions

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 3c9d16b4f80c..f9f5fc13dc7d 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -272,6 +272,11 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
         unsigned long user_addr = (unsigned long)iov->iov_base;
         size_t count = iov->iov_len;
         size_t rsize = NFS_SERVER(inode)->rsize;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(inode),
+                .callback_ops = &nfs_read_direct_ops,
+                .flags = RPC_TASK_ASYNC,
+        };
         unsigned int pgbase;
         int result;
         ssize_t started = 0;
@@ -322,8 +327,8 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                 data->res.eof = 0;
                 data->res.count = bytes;
 
-                rpc_init_task(&data->task, NFS_CLIENT(inode), RPC_TASK_ASYNC,
-                                &nfs_read_direct_ops, data);
+                task_setup_data.callback_data = data;
+                rpc_init_task(&data->task, &task_setup_data);
                 NFS_PROTO(inode)->read_setup(data);
 
                 data->task.tk_cookie = (unsigned long) inode;
@@ -431,6 +436,11 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
         struct inode *inode = dreq->inode;
         struct list_head *p;
         struct nfs_write_data *data;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(inode),
+                .callback_ops = &nfs_write_direct_ops,
+                .flags = RPC_TASK_ASYNC,
+        };
 
         dreq->count = 0;
         get_dreq(dreq);
@@ -451,8 +461,8 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
                  * Reuse data->task; data->args should not have changed
                  * since the original request was sent.
                  */
-                rpc_init_task(&data->task, NFS_CLIENT(inode), RPC_TASK_ASYNC,
-                                &nfs_write_direct_ops, data);
+                task_setup_data.callback_data = data;
+                rpc_init_task(&data->task, &task_setup_data);
                 NFS_PROTO(inode)->write_setup(data, FLUSH_STABLE);
 
                 data->task.tk_priority = RPC_PRIORITY_NORMAL;
@@ -504,6 +514,12 @@ static const struct rpc_call_ops nfs_commit_direct_ops = {
 static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
 {
         struct nfs_write_data *data = dreq->commit_data;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(dreq->inode),
+                .callback_ops = &nfs_commit_direct_ops,
+                .callback_data = data,
+                .flags = RPC_TASK_ASYNC,
+        };
 
         data->inode = dreq->inode;
         data->cred = dreq->ctx->cred;
@@ -515,8 +531,7 @@ static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
         data->res.fattr = &data->fattr;
         data->res.verf = &data->verf;
 
-        rpc_init_task(&data->task, NFS_CLIENT(dreq->inode), RPC_TASK_ASYNC,
-                                &nfs_commit_direct_ops, data);
+        rpc_init_task(&data->task, &task_setup_data);
         NFS_PROTO(data->inode)->commit_setup(data, 0);
 
         data->task.tk_priority = RPC_PRIORITY_NORMAL;
@@ -641,6 +656,11 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
         struct inode *inode = ctx->path.dentry->d_inode;
         unsigned long user_addr = (unsigned long)iov->iov_base;
         size_t count = iov->iov_len;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(inode),
+                .callback_ops = &nfs_write_direct_ops,
+                .flags = RPC_TASK_ASYNC,
+        };
         size_t wsize = NFS_SERVER(inode)->wsize;
         unsigned int pgbase;
         int result;
@@ -694,8 +714,8 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
                 data->res.count = bytes;
                 data->res.verf = &data->verf;
 
-                rpc_init_task(&data->task, NFS_CLIENT(inode), RPC_TASK_ASYNC,
-                                &nfs_write_direct_ops, data);
+                task_setup_data.callback_data = data;
+                rpc_init_task(&data->task, &task_setup_data);
                 NFS_PROTO(inode)->write_setup(data, sync);
 
                 data->task.tk_priority = RPC_PRIORITY_NORMAL;
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 4587a86adaac..c7f0d5ebd451 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -160,11 +160,17 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
                 const struct rpc_call_ops *call_ops,
                 unsigned int count, unsigned int offset)
 {
-        struct inode            *inode;
-        int flags;
+        struct inode *inode = req->wb_context->path.dentry->d_inode;
+        int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(inode),
+                .callback_ops = call_ops,
+                .callback_data = data,
+                .flags = RPC_TASK_ASYNC | swap_flags,
+        };
 
         data->req         = req;
-        data->inode       = inode = req->wb_context->path.dentry->d_inode;
+        data->inode       = inode;
         data->cred        = req->wb_context->cred;
 
         data->args.fh     = NFS_FH(inode);
@@ -180,8 +186,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
         nfs_fattr_init(&data->fattr);
 
         /* Set up the initial task struct. */
-        flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
-        rpc_init_task(&data->task, NFS_CLIENT(inode), flags, call_ops, data);
+        rpc_init_task(&data->task, &task_setup_data);
         NFS_PROTO(inode)->read_setup(data);
 
         data->task.tk_cookie = (unsigned long)inode;
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 092e79c6d962..c4376606f106 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -773,8 +773,14 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
                 unsigned int count, unsigned int offset,
                 int how)
 {
-        struct inode            *inode;
-        int flags;
+        struct inode *inode = req->wb_context->path.dentry->d_inode;
+        int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(inode),
+                .callback_ops = call_ops,
+                .callback_data = data,
+                .flags = flags,
+        };
 
         /* Set up the RPC argument and reply structs
          * NB: take care not to mess about with data->commit et al. */
@@ -796,8 +802,7 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
         nfs_fattr_init(&data->fattr);
 
         /* Set up the initial task struct.  */
-        flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
-        rpc_init_task(&data->task, NFS_CLIENT(inode), flags, call_ops, data);
+        rpc_init_task(&data->task, &task_setup_data);
         NFS_PROTO(inode)->write_setup(data, how);
 
         data->task.tk_priority = flush_task_priority(how);
@@ -1144,16 +1149,20 @@ static void nfs_commit_rpcsetup(struct list_head *head,
                 struct nfs_write_data *data,
                 int how)
 {
-        struct nfs_page         *first;
-        struct inode            *inode;
-        int flags;
+        struct nfs_page *first = nfs_list_entry(head->next);
+        struct inode *inode = first->wb_context->path.dentry->d_inode;
+        int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = NFS_CLIENT(inode),
+                .callback_ops = &nfs_commit_ops,
+                .callback_data = data,
+                .flags = flags,
+        };
 
         /* Set up the RPC argument and reply structs
          * NB: take care not to mess about with data->commit et al. */
 
         list_splice_init(head, &data->pages);
-        first = nfs_list_entry(data->pages.next);
-        inode = first->wb_context->path.dentry->d_inode;
 
         data->inode       = inode;
         data->cred        = first->wb_context->cred;
@@ -1168,8 +1177,7 @@ static void nfs_commit_rpcsetup(struct list_head *head,
         nfs_fattr_init(&data->fattr);
 
         /* Set up the initial task struct.  */
-        flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
-        rpc_init_task(&data->task, NFS_CLIENT(inode), flags, &nfs_commit_ops, data);
+        rpc_init_task(&data->task, &task_setup_data);
         NFS_PROTO(inode)->commit_setup(data, how);
 
         data->task.tk_priority = flush_task_priority(how);
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index d9d5c5ad826c..ec9704181f94 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -126,7 +126,7 @@ int		rpcb_register(u32, u32, int, unsigned short, int *);
 int             rpcb_getport_sync(struct sockaddr_in *, __u32, __u32, int);
 void            rpcb_getport_async(struct rpc_task *);
 
-void            rpc_call_setup(struct rpc_task *, struct rpc_message *, int);
+void            rpc_call_setup(struct rpc_task *, const struct rpc_message *, int);
 
 int             rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
                                int flags, const struct rpc_call_ops *tk_ops,
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index 8ea077db0099..9efe045fc376 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -117,6 +117,13 @@ struct rpc_call_ops {
         void (*rpc_release)(void *);
 };
 
+struct rpc_task_setup {
+        struct rpc_clnt *rpc_client;
+        const struct rpc_message *rpc_message;
+        const struct rpc_call_ops *callback_ops;
+        void *callback_data;
+        unsigned short flags;
+};
 
 /*
  * RPC task flags
@@ -236,13 +243,10 @@ struct rpc_wait_queue {
 /*
  * Function prototypes
  */
-struct rpc_task *rpc_new_task(struct rpc_clnt *, int flags,
-                                const struct rpc_call_ops *ops, void *data);
+struct rpc_task *rpc_new_task(const struct rpc_task_setup *);
 struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
                                 const struct rpc_call_ops *ops, void *data);
-void            rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt,
-                                int flags, const struct rpc_call_ops *ops,
-                                void *data);
+void            rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *);
 void            rpc_put_task(struct rpc_task *);
 void            rpc_exit_task(struct rpc_task *);
 void            rpc_release_calldata(const struct rpc_call_ops *, void *);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 22092b91dd85..7c80abd9263f 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -524,25 +524,22 @@ void rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset)
 EXPORT_SYMBOL_GPL(rpc_clnt_sigunmask);
 
 static
-struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
-                struct rpc_message *msg,
-                int flags,
-                const struct rpc_call_ops *ops,
-                void *data)
+struct rpc_task *rpc_do_run_task(const struct rpc_task_setup *task_setup_data)
 {
         struct rpc_task *task, *ret;
         sigset_t oldset;
 
-        task = rpc_new_task(clnt, flags, ops, data);
+        task = rpc_new_task(task_setup_data);
         if (task == NULL) {
-                rpc_release_calldata(ops, data);
+                rpc_release_calldata(task_setup_data->callback_ops,
+                                task_setup_data->callback_data);
                 return ERR_PTR(-ENOMEM);
         }
 
         /* Mask signals on synchronous RPC calls and RPCSEC_GSS upcalls */
         rpc_task_sigmask(task, &oldset);
-        if (msg != NULL) {
-                rpc_call_setup(task, msg, 0);
+        if (task_setup_data->rpc_message != NULL) {
+                rpc_call_setup(task, task_setup_data->rpc_message, 0);
                 if (task->tk_status != 0) {
                         ret = ERR_PTR(task->tk_status);
                         rpc_put_task(task);
@@ -566,11 +563,17 @@ out:
 int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
 {
         struct rpc_task *task;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = clnt,
+                .rpc_message = msg,
+                .callback_ops = &rpc_default_ops,
+                .flags = flags,
+        };
         int status;
 
         BUG_ON(flags & RPC_TASK_ASYNC);
 
-        task = rpc_do_run_task(clnt, msg, flags, &rpc_default_ops, NULL);
+        task = rpc_do_run_task(&task_setup_data);
         if (IS_ERR(task))
                 return PTR_ERR(task);
         status = task->tk_status;
@@ -592,8 +595,15 @@ rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags,
                const struct rpc_call_ops *tk_ops, void *data)
 {
         struct rpc_task *task;
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = clnt,
+                .rpc_message = msg,
+                .callback_ops = tk_ops,
+                .callback_data = data,
+                .flags = flags|RPC_TASK_ASYNC,
+        };
 
-        task = rpc_do_run_task(clnt, msg, flags|RPC_TASK_ASYNC, tk_ops, data);
+        task = rpc_do_run_task(&task_setup_data);
         if (IS_ERR(task))
                 return PTR_ERR(task);
         rpc_put_task(task);
@@ -612,12 +622,19 @@ struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
                                         const struct rpc_call_ops *tk_ops,
                                         void *data)
 {
-        return rpc_do_run_task(clnt, NULL, flags, tk_ops, data);
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = clnt,
+                .callback_ops = tk_ops,
+                .callback_data = data,
+                .flags = flags,
+        };
+
+        return rpc_do_run_task(&task_setup_data);
 }
 EXPORT_SYMBOL_GPL(rpc_run_task);
 
 void
-rpc_call_setup(struct rpc_task *task, struct rpc_message *msg, int flags)
+rpc_call_setup(struct rpc_task *task, const struct rpc_message *msg, int flags)
 {
         task->tk_msg   = *msg;
         task->tk_flags |= flags;
@@ -1527,7 +1544,13 @@ struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int
                 .rpc_proc = &rpcproc_null,
                 .rpc_cred = cred,
         };
-        return rpc_do_run_task(clnt, &msg, flags, &rpc_default_ops, NULL);
+        struct rpc_task_setup task_setup_data = {
+                .rpc_client = clnt,
+                .rpc_message = &msg,
+                .callback_ops = &rpc_default_ops,
+                .flags = flags,
+        };
+        return rpc_do_run_task(&task_setup_data);
 }
 EXPORT_SYMBOL_GPL(rpc_call_null);
 
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index d0b4c7e11e06..10216989309c 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -815,18 +815,15 @@ EXPORT_SYMBOL_GPL(rpc_free);
 /*
  * Creation and deletion of RPC task structures
  */
-void rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt, int flags, const struct rpc_call_ops *tk_ops, void *calldata)
+void rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *task_setup_data)
 {
         memset(task, 0, sizeof(*task));
         setup_timer(&task->tk_timer, (void (*)(unsigned long))rpc_run_timer,
                         (unsigned long)task);
         atomic_set(&task->tk_count, 1);
-        task->tk_client = clnt;
-        task->tk_flags  = flags;
-        task->tk_ops = tk_ops;
-        if (tk_ops->rpc_call_prepare != NULL)
-                task->tk_action = rpc_prepare_task;
-        task->tk_calldata = calldata;
+        task->tk_flags  = task_setup_data->flags;
+        task->tk_ops = task_setup_data->callback_ops;
+        task->tk_calldata = task_setup_data->callback_data;
         INIT_LIST_HEAD(&task->tk_task);
 
         /* Initialize retry counters */
@@ -839,15 +836,17 @@ void rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt, int flags, cons
         /* Initialize workqueue for async tasks */
         task->tk_workqueue = rpciod_workqueue;
 
-        if (clnt) {
-                kref_get(&clnt->cl_kref);
-                if (clnt->cl_softrtry)
+        task->tk_client = task_setup_data->rpc_client;
+        if (task->tk_client != NULL) {
+                kref_get(&task->tk_client->cl_kref);
+                if (task->tk_client->cl_softrtry)
                         task->tk_flags |= RPC_TASK_SOFT;
-                if (!clnt->cl_intr)
+                if (!task->tk_client->cl_intr)
                         task->tk_flags |= RPC_TASK_NOINTR;
         }
 
-        BUG_ON(task->tk_ops == NULL);
+        if (task->tk_ops->rpc_call_prepare != NULL)
+                task->tk_action = rpc_prepare_task;
 
         /* starting timestamp */
         task->tk_start = jiffies;
@@ -873,7 +872,7 @@ static void rpc_free_task(struct rcu_head *rcu)
 /*
  * Create a new task for the specified client.
  */
-struct rpc_task *rpc_new_task(struct rpc_clnt *clnt, int flags, const struct rpc_call_ops *tk_ops, void *calldata)
+struct rpc_task *rpc_new_task(const struct rpc_task_setup *setup_data)
 {
         struct rpc_task *task;
 
@@ -881,7 +880,7 @@ struct rpc_task *rpc_new_task(struct rpc_clnt *clnt, int flags, const struct rpc
         if (!task)
                 goto out;
 
-        rpc_init_task(task, clnt, flags, tk_ops, calldata);
+        rpc_init_task(task, setup_data);
 
         dprintk("RPC:       allocated task %p\n", task);
         task->tk_flags |= RPC_TASK_DYNAMIC;