summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--fs/9p/v9fs.c2
-rw-r--r--fs/9p/v9fs_vfs.h2
-rw-r--r--fs/9p/vfs_addr.c5
-rw-r--r--fs/9p/vfs_file.c57
-rw-r--r--include/net/9p/client.h1
-rw-r--r--net/9p/client.c26
6 files changed, 57 insertions, 36 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index b6b85cf01e0..24eb01087b6 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -234,7 +234,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
if (!v9ses->clnt->dotu)
v9ses->flags &= ~V9FS_EXTENDED;
- v9ses->maxdata = v9ses->clnt->msize;
+ v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
/* for legacy mode, fall back to V9FS_ACCESS_ANY */
if (!v9fs_extended(v9ses) &&
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 57997fa14e6..046cff377f1 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -52,3 +52,5 @@ int v9fs_file_open(struct inode *inode, struct file *file);
void v9fs_inode2stat(struct inode *inode, struct p9_stat *stat);
void v9fs_dentry_release(struct dentry *);
int v9fs_uflags2omode(int uflags, int extended);
+
+ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64);
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 97d3aed5798..6fcb1e7095c 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -38,7 +38,6 @@
#include "v9fs.h"
#include "v9fs_vfs.h"
-#include "fid.h"
/**
* v9fs_vfs_readpage - read an entire page in from 9P
@@ -53,14 +52,12 @@ static int v9fs_vfs_readpage(struct file *filp, struct page *page)
int retval;
loff_t offset;
char *buffer;
- struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_VFS, "\n");
- fid = filp->private_data;
buffer = kmap(page);
offset = page_offset(page);
- retval = p9_client_readn(fid, buffer, offset, PAGE_CACHE_SIZE);
+ retval = v9fs_file_readn(filp, buffer, NULL, offset, PAGE_CACHE_SIZE);
if (retval < 0)
goto done;
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 3819a195de8..4d6d7657fb7 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -120,23 +120,72 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
}
/**
- * v9fs_file_read - read from a file
+ * v9fs_file_readn - read from a file
* @filp: file pointer to read
* @data: data buffer to read data into
+ * @udata: user data buffer to read data into
* @count: size of buffer
* @offset: offset at which to read data
*
*/
+
+ssize_t
+v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
+ u64 offset)
+{
+ int n, total;
+ struct p9_fid *fid = filp->private_data;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
+ (long long unsigned) offset, count);
+
+ n = 0;
+ total = 0;
+ do {
+ n = p9_client_read(fid, data, udata, offset, count);
+ if (n <= 0)
+ break;
+
+ if (data)
+ data += n;
+ if (udata)
+ udata += n;
+
+ offset += n;
+ count -= n;
+ total += n;
+ } while (count > 0 && n == (fid->clnt->msize - P9_IOHDRSZ));
+
+ if (n < 0)
+ total = n;
+
+ return total;
+}
+
+/**
+ * v9fs_file_read - read from a file
+ * @filp: file pointer to read
+ * @udata: user data buffer to read data into
+ * @count: size of buffer
+ * @offset: offset at which to read data
+ *
+ */
+
static ssize_t
-v9fs_file_read(struct file *filp, char __user * data, size_t count,
+v9fs_file_read(struct file *filp, char __user *udata, size_t count,
loff_t * offset)
{
int ret;
struct p9_fid *fid;
- P9_DPRINTK(P9_DEBUG_VFS, "\n");
+ P9_DPRINTK(P9_DEBUG_VFS, "count %d offset %lld\n", count, *offset);
fid = filp->private_data;
- ret = p9_client_read(fid, NULL, data, *offset, count);
+
+ if (count > (fid->clnt->msize - P9_IOHDRSZ))
+ ret = v9fs_file_readn(filp, NULL, udata, count, *offset);
+ else
+ ret = p9_client_read(fid, NULL, udata, *offset, count);
+
if (ret > 0)
*offset += ret;
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index c70a0f0b448..bb8b0ede132 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -203,7 +203,6 @@ int p9_client_clunk(struct p9_fid *fid);
int p9_client_remove(struct p9_fid *fid);
int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
u64 offset, u32 count);
-int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count);
int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
u64 offset, u32 count);
struct p9_stat *p9_client_stat(struct p9_fid *fid);
diff --git a/net/9p/client.c b/net/9p/client.c
index 5fc3aa1eb39..d5ea042eabb 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1150,32 +1150,6 @@ error:
}
EXPORT_SYMBOL(p9_client_write);
-int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count)
-{
- int n, total;
-
- P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
- (long long unsigned) offset, count);
- n = 0;
- total = 0;
- while (count) {
- n = p9_client_read(fid, data, NULL, offset, count);
- if (n <= 0)
- break;
-
- data += n;
- offset += n;
- count -= n;
- total += n;
- }
-
- if (n < 0)
- total = n;
-
- return total;
-}
-EXPORT_SYMBOL(p9_client_readn);
-
static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu)
{
int n;