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authorChris Mason <mason@suse.com>2006-09-29 02:00:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-29 09:18:12 -0700
commitae78bf9c4f5fde3c67e2829505f195d7347ce3e4 (patch)
treeb9376237e596ed7e95db35b9ccf1ad3177b10460 /fs/fat/file.c
parent6b77df08a36d989f7dd00ccb6a026a0e96170d16 (diff)
[PATCH] add -o flush for fat
Fat is commonly used on removable media. Mounting with -o flush tells the FS to write things to disk as quickly as possible. It is like -o sync, but much faster (and not as safe). Signed-off-by: Chris Mason <mason@suse.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/fat/file.c')
-rw-r--r--fs/fat/file.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 1ee25232e6af..d50fc47169c1 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -13,6 +13,7 @@
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/writeback.h>
+#include <linux/blkdev.h>
int fat_generic_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
@@ -112,6 +113,16 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
}
}
+static int fat_file_release(struct inode *inode, struct file *filp)
+{
+ if ((filp->f_mode & FMODE_WRITE) &&
+ MSDOS_SB(inode->i_sb)->options.flush) {
+ fat_flush_inodes(inode->i_sb, inode, NULL);
+ blk_congestion_wait(WRITE, HZ/10);
+ }
+ return 0;
+}
+
const struct file_operations fat_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
@@ -121,6 +132,7 @@ const struct file_operations fat_file_operations = {
.aio_read = generic_file_aio_read,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
+ .release = fat_file_release,
.ioctl = fat_generic_ioctl,
.fsync = file_fsync,
.sendfile = generic_file_sendfile,
@@ -289,6 +301,7 @@ void fat_truncate(struct inode *inode)
lock_kernel();
fat_free(inode, nr_clusters);
unlock_kernel();
+ fat_flush_inodes(inode->i_sb, inode, NULL);
}
struct inode_operations fat_file_inode_operations = {