nfs41 write sequence setup done support
Andy Adamson [Wed, 1 Apr 2009 13:22:26 +0000 (09:22 -0400)]
Separate write calls from nfs41: sequence setup/done support

Implement the write rpc_call_prepare method for
asynchronuos nfs rpcs, call nfs41_setup_sequence from
respective rpc_call_validate_args methods.

Call nfs4_sequence_done from respective rpc_call_done methods.

Note that we need to pass a pointer to the nfs_server in calls data
for passing on to nfs4_sequence_done.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[pnfs: client data server write validate and release]
Signed-off-by: Andy Adamson <andros@umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[move the nfs4_sequence_free_slot call in nfs_readpage_retry from]
[nfs41: separate free slot from sequence done
Signed-off-by: Andy Adamson <andros@umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: Support sessions with O_DIRECT.]
Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: nfs4_sequence_free_slot use nfs_client for data server]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/direct.c
fs/nfs/internal.h
fs/nfs/nfs4proc.c
fs/nfs/write.c

index c8c53a0..1955bfe 100644 (file)
@@ -676,6 +676,9 @@ out_unlock:
 }
 
 static const struct rpc_call_ops nfs_write_direct_ops = {
+#if defined(CONFIG_NFS_V4_1)
+       .rpc_call_prepare = nfs_write_prepare,
+#endif /* CONFIG_NFS_V4_1 */
        .rpc_call_done = nfs_direct_write_result,
        .rpc_release = nfs_direct_write_release,
 };
index 988c8b9..f62bc52 100644 (file)
@@ -209,6 +209,9 @@ extern int nfs4_path_walk(struct nfs_server *server,
 /* read.c */
 extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
 
+/* write.c */
+extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
+
 /* nfs4proc.c */
 extern int _nfs4_call_sync(struct nfs_server *server,
                           struct rpc_message *msg,
index 6c0ac53..5f71832 100644 (file)
@@ -2890,6 +2890,10 @@ static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
 {
        struct inode *inode = data->inode;
        
+       /* slot is freed in nfs_writeback_done */
+       nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
+                          task->tk_status);
+
        if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
                rpc_restart_call(task);
                return -EAGAIN;
index 035e6fb..195fe76 100644 (file)
@@ -25,6 +25,7 @@
 #include "delegation.h"
 #include "internal.h"
 #include "iostat.h"
+#include "nfs4_fs.h"
 
 #define NFSDBG_FACILITY                NFSDBG_PAGECACHE
 
@@ -1050,7 +1051,23 @@ out:
        nfs_writedata_release(calldata);
 }
 
+#if defined(CONFIG_NFS_V4_1)
+void nfs_write_prepare(struct rpc_task *task, void *calldata)
+{
+       struct nfs_write_data *data = calldata;
+       struct nfs_client *clp = (NFS_SERVER(data->inode))->nfs_client;
+
+       if (nfs4_setup_sequence(clp, &data->args.seq_args,
+                               &data->res.seq_res, 1, task))
+               return;
+       rpc_call_start(task);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
 static const struct rpc_call_ops nfs_write_partial_ops = {
+#if defined(CONFIG_NFS_V4_1)
+       .rpc_call_prepare = nfs_write_prepare,
+#endif /* CONFIG_NFS_V4_1 */
        .rpc_call_done = nfs_writeback_done_partial,
        .rpc_release = nfs_writeback_release_partial,
 };
@@ -1113,6 +1130,9 @@ remove_request:
 }
 
 static const struct rpc_call_ops nfs_write_full_ops = {
+#if defined(CONFIG_NFS_V4_1)
+       .rpc_call_prepare = nfs_write_prepare,
+#endif /* CONFIG_NFS_V4_1 */
        .rpc_call_done = nfs_writeback_done_full,
        .rpc_release = nfs_writeback_release_full,
 };
@@ -1195,6 +1215,8 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)
                /* Can't do anything about it except throw an error. */
                task->tk_status = -EIO;
        }
+       nfs4_sequence_free_slot(NFS_SERVER(data->inode)->nfs_client,
+                               &data->res.seq_res);
        return 0;
 }