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nfs41: read sequence setup/done support 

Implement the read 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]
[remove nfs_readargs.nfs_server, use calldata->inode instead]
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>
This commit is contained in:
Andy Adamson 2009-04-01 09:22:25 -04:00 committed by Benny Halevy
parent 472cfbd9b9
commit f11c88af26
4 changed files with 39 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/nfs/direct.c
View File

@ -259,6 +259,9 @@ static void nfs_direct_read_release(void *calldata)
}
static const struct rpc_call_ops nfs_read_direct_ops = {
#if defined(CONFIG_NFS_V4_1)
.rpc_call_prepare = nfs_read_prepare,
#endif /* CONFIG_NFS_V4_1 */
.rpc_call_done = nfs_direct_read_result,
.rpc_release = nfs_direct_read_release,
};

3
fs/nfs/internal.h
View File

@ -206,6 +206,9 @@ extern int nfs4_path_walk(struct nfs_server *server,
const char *path);
#endif
/* read.c */
extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
/* nfs4proc.c */
extern int _nfs4_call_sync(struct nfs_server *server,
struct rpc_message *msg,

5
fs/nfs/nfs4proc.c
View File

@ -2864,6 +2864,11 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
struct nfs_server *server = NFS_SERVER(data->inode);
dprintk("--> %s\n", __func__);
/* nfs4_sequence_free_slot called in the read rpc_call_done */
nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
rpc_restart_call(task);
return -EAGAIN;

30
fs/nfs/read.c
View File

@ -22,6 +22,7 @@
#include <asm/system.h>
#include "nfs4_fs.h"
#include "internal.h"
#include "iostat.h"
#include "fscache.h"
@ -358,19 +359,25 @@ static void nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data
struct nfs_readres *resp = &data->res;
if (resp->eof || resp->count == argp->count)
return;
goto out;
/* This is a short read! */
nfs_inc_stats(data->inode, NFSIOS_SHORTREAD);
/* Has the server at least made some progress? */
if (resp->count == 0)
return;
goto out;
/* Yes, so retry the read at the end of the data */
argp->offset += resp->count;
argp->pgbase += resp->count;
argp->count -= resp->count;
rpc_restart_call(task);
return;
out:
nfs4_sequence_free_slot(NFS_SERVER(data->inode)->nfs_client,
&data->res.seq_res);
return;
}
/*
@ -407,7 +414,23 @@ static void nfs_readpage_release_partial(void *calldata)
nfs_readdata_release(calldata);
}
#if defined(CONFIG_NFS_V4_1)
void nfs_read_prepare(struct rpc_task *task, void *calldata)
{
struct nfs_read_data *data = calldata;
if (nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
&data->args.seq_args, &data->res.seq_res,
0, task))
return;
rpc_call_start(task);
}
#endif /* CONFIG_NFS_V4_1 */
static const struct rpc_call_ops nfs_read_partial_ops = {
#if defined(CONFIG_NFS_V4_1)
.rpc_call_prepare = nfs_read_prepare,
#endif /* CONFIG_NFS_V4_1 */
.rpc_call_done = nfs_readpage_result_partial,
.rpc_release = nfs_readpage_release_partial,
};
@ -471,6 +494,9 @@ static void nfs_readpage_release_full(void *calldata)
}
static const struct rpc_call_ops nfs_read_full_ops = {
#if defined(CONFIG_NFS_V4_1)
.rpc_call_prepare = nfs_read_prepare,
#endif /* CONFIG_NFS_V4_1 */
.rpc_call_done = nfs_readpage_result_full,
.rpc_release = nfs_readpage_release_full,
};