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add DFS_NFS_MAX_MTU to nfs to support read/write more than one mtu data in nfs; 2) fix a bug in nfs_lseek when offset is at the end of file. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2485 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
goprife@gmail.com 2012-12-15 11:37:41 +00:00
parent ea4082b791
commit 4f7cfcd5e9
1 changed files with 77 additions and 53 deletions
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130
components/dfs/filesystems/nfs/dfs_nfs.c
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@ -22,6 +22,11 @@
#include "nfs.h"
#define NAME_MAX 64
#define DFS_NFS_MAX_MTU 1024
#ifdef _WIN32
#define strtok_r strtok_s
#endif
struct nfs_file
{
@ -532,7 +537,7 @@ int nfs_read(struct dfs_fd *file, void *buf, rt_size_t count)
{
READ3args args;
READ3res res;
ssize_t bytes;
ssize_t bytes, total=0;
nfs_file *fd;
struct nfs_filesystem *nfs;
@ -553,43 +558,52 @@ int nfs_read(struct dfs_fd *file, void *buf, rt_size_t count)
return 0;
args.file = fd->handle;
args.offset = fd->offset;
args.count = count;
do {
args.offset = fd->offset;
args.count = count > DFS_NFS_MAX_MTU ? DFS_NFS_MAX_MTU : count;
count -= args.count;
memset(&res, 0, sizeof(res));
if (nfsproc3_read_3(args, &res, nfs->nfs_client) != RPC_SUCCESS)
{
rt_kprintf("Read failed\n");
bytes = 0;
}
else if (res.status != NFS3_OK)
{
rt_kprintf("Read failed: %d\n", res.status);
bytes = 0;
}
else
{
if (res.READ3res_u.resok.eof)
memset(&res, 0, sizeof(res));
if (nfsproc3_read_3(args, &res, nfs->nfs_client) != RPC_SUCCESS)
{
/* something should probably be here */
fd->eof = TRUE;
rt_kprintf("Read failed\n");
total = 0;
break;
}
bytes = res.READ3res_u.resok.count;
fd->offset += bytes;
/* update current position */
file->pos = fd->offset;
memcpy(buf, res.READ3res_u.resok.data.data_val, bytes);
}
xdr_free((xdrproc_t)xdr_READ3res, (char *)&res);
else if (res.status != NFS3_OK)
{
rt_kprintf("Read failed: %d\n", res.status);
total = 0;
break;
}
else
{
bytes = res.READ3res_u.resok.count;
total += bytes;
fd->offset += bytes;
/* update current position */
file->pos = fd->offset;
memcpy(buf, res.READ3res_u.resok.data.data_val, bytes);
buf = (void *)((char *)buf + args.count);
if (res.READ3res_u.resok.eof)
{
/* something should probably be here */
fd->eof = TRUE;
break;
}
}
xdr_free((xdrproc_t)xdr_READ3res, (char *)&res);
} while(count > 0);
return bytes;
xdr_free((xdrproc_t)xdr_READ3res, (char *)&res);
return total;
}
int nfs_write(struct dfs_fd *file, const void *buf, rt_size_t count)
{
WRITE3args args;
WRITE3res res;
ssize_t bytes;
ssize_t bytes, total=0;
nfs_file *fd;
struct nfs_filesystem *nfs;
@ -607,33 +621,43 @@ int nfs_write(struct dfs_fd *file, const void *buf, rt_size_t count)
args.file = fd->handle;
args.stable = FILE_SYNC;
args.offset = fd->offset;
memset(&res, 0, sizeof(res));
args.data.data_val=(void *)buf;
args.count=args.data.data_len = count;
do {
args.offset = fd->offset;
memset(&res, 0, sizeof(res));
args.data.data_val=(void *)buf;
args.count = count > DFS_NFS_MAX_MTU ? DFS_NFS_MAX_MTU : count;
args.data.data_len = args.count;
count -= args.count;
buf = (const void *)((char *)buf + args.count);
if (nfsproc3_write_3(args, &res, nfs->nfs_client) != RPC_SUCCESS)
{
rt_kprintf("Write failed\n");
total = 0;
break;
}
else if (res.status != NFS3_OK)
{
rt_kprintf("Write failed: %d\n", res.status);
total = 0;
break;
}
else
{
bytes = res.WRITE3res_u.resok.count;
fd->offset += bytes;
total += bytes;
/* update current position */
file->pos = fd->offset;
/* todo: update file size */
}
xdr_free((xdrproc_t)xdr_WRITE3res, (char *)&res);
} while (count > 0);
if (nfsproc3_write_3(args, &res, nfs->nfs_client) != RPC_SUCCESS)
{
rt_kprintf("Write failed\n");
bytes = 0;
}
else if (res.status != NFS3_OK)
{
rt_kprintf("Write failed: %d\n", res.status);
bytes = 0;
}
else
{
bytes = res.WRITE3res_u.resok.count;
fd->offset += bytes;
/* update current position */
file->pos = fd->offset;
/* todo: update file size */
}
xdr_free((xdrproc_t)xdr_WRITE3res, (char *)&res);
return bytes;
return total;
}
int nfs_lseek(struct dfs_fd *file, rt_off_t offset)
@ -646,7 +670,7 @@ int nfs_lseek(struct dfs_fd *file, rt_off_t offset)
fd = (nfs_file *)(file->data);
RT_ASSERT(fd != RT_NULL);
if (offset < fd->size)
if (offset <= fd->size)
{
fd->offset = offset;
return offset;