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9p: Fix the incorrect update of inode size in v9fs_file_write() 

When using the cache=loose flags, the inode's size was not being
updated correctly on a remote write. Thus subsequent reads of
the whole file resulted in a truncated read. Fix it.

Signed-off-by: Abhishek Kulkarni <adkulkar@umail.iu.edu>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Abhishek Kulkarni 2009-09-22 11:34:05 -05:00 committed by Eric Van Hensbergen
parent 7549ae3e81
commit 637d020a02
1 changed files with 8 additions and 7 deletions
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15
fs/9p/vfs_file.c
View File

@ -32,6 +32,7 @@
#include <linux/string.h>
#include <linux/inet.h>
#include <linux/list.h>
#include <linux/pagemap.h>
#include <asm/uaccess.h>
#include <linux/idr.h>
#include <net/9p/9p.h>
@ -210,6 +211,7 @@ v9fs_file_write(struct file *filp, const char __user * data,
struct p9_client *clnt;
struct inode *inode = filp->f_path.dentry->d_inode;
int origin = *offset;
unsigned long pg_start, pg_end;
P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
(int)count, (int)*offset);
@ -225,7 +227,7 @@ v9fs_file_write(struct file *filp, const char __user * data,
if (count < rsize)
rsize = count;
n = p9_client_write(fid, NULL, data+total, *offset+total,
n = p9_client_write(fid, NULL, data+total, origin+total,
rsize);
if (n <= 0)
break;
@ -234,13 +236,12 @@ v9fs_file_write(struct file *filp, const char __user * data,
} while (count > 0);
if (total > 0) {
invalidate_inode_pages2_range(inode->i_mapping, origin,
origin+total);
pg_start = origin >> PAGE_CACHE_SHIFT;
pg_end = (origin + total - 1) >> PAGE_CACHE_SHIFT;
invalidate_inode_pages2_range(inode->i_mapping, pg_start,
pg_end);
*offset += total;
}
if (*offset > i_size_read(inode)) {
i_size_write(inode, *offset);
i_size_write(inode, i_size_read(inode) + total);
inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
}