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Subject[PATCH 1/29] fat: fix writev(), add aio support
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Date

This patch fixes vectored write support on fat to do the nessecary
non-standard action done in write() aswell.

Also adds aio support and makes read/write wrappers around the aio
version.

From: Christoph Hellwig <hch@lst.de>

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
---

fs/fat/file.c | 31 ++++++++++++++++++++++++-------
1 files changed, 24 insertions(+), 7 deletions(-)

diff -puN fs/fat/file.c~fat_support-aio fs/fat/file.c
--- linux-2.6.11/fs/fat/file.c~fat_support-aio 2005-03-06 02:17:05.000000000 +0900
+++ linux-2.6.11-hirofumi/fs/fat/file.c 2005-03-06 02:35:38.000000000 +0900
@@ -12,13 +12,28 @@
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>

-static ssize_t fat_file_write(struct file *filp, const char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t fat_file_aio_write(struct kiocb *iocb, const char __user *buf,
+ size_t count, loff_t pos)
+{
+ struct inode *inode = iocb->ki_filp->f_dentry->d_inode;
+ int retval;
+
+ retval = generic_file_aio_write(iocb, buf, count, pos);
+ if (retval > 0) {
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+ MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
+ mark_inode_dirty(inode);
+ }
+ return retval;
+}
+
+static ssize_t fat_file_writev(struct file *filp, const struct iovec *iov,
+ unsigned long nr_segs, loff_t *ppos)
{
struct inode *inode = filp->f_dentry->d_inode;
int retval;

- retval = generic_file_write(filp, buf, count, ppos);
+ retval = generic_file_writev(filp, iov, nr_segs, ppos);
if (retval > 0) {
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
@@ -29,12 +44,14 @@ static ssize_t fat_file_write(struct fil

struct file_operations fat_file_operations = {
.llseek = generic_file_llseek,
- .read = generic_file_read,
- .write = fat_file_write,
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .readv = generic_file_readv,
+ .writev = fat_file_writev,
+ .aio_read = generic_file_aio_read,
+ .aio_write = fat_file_aio_write,
.mmap = generic_file_mmap,
.fsync = file_fsync,
- .readv = generic_file_readv,
- .writev = generic_file_writev,
.sendfile = generic_file_sendfile,
};

_
-
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