From: OGAWA Hirofumi This patch fixes miss-sync issue on write() system call. This updates inode attrs flags, mtime and ctime on every comit_write call, due to locking. Signed-off-by: Hiroyuki Machida Signed-off-by: OGAWA Hirofumi Signed-off-by: Andrew Morton --- fs/fat/file.c | 37 ++----------------------------------- fs/fat/inode.c | 15 ++++++++++++++- 2 files changed, 16 insertions(+), 36 deletions(-) diff -puN fs/fat/file.c~fat-miss-sync-issues-on-sync-mount-miss-sync-on-write fs/fat/file.c --- devel/fs/fat/file.c~fat-miss-sync-issues-on-sync-mount-miss-sync-on-write 2005-09-15 18:55:43.000000000 -0700 +++ devel-akpm/fs/fat/file.c 2005-09-15 18:55:43.000000000 -0700 @@ -12,39 +12,6 @@ #include #include -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); -// check the locking rules -// if (IS_SYNC(inode)) -// fat_sync_inode(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_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; - mark_inode_dirty(inode); - } - return retval; -} - int fat_generic_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { @@ -148,9 +115,9 @@ struct file_operations fat_file_operatio .read = do_sync_read, .write = do_sync_write, .readv = generic_file_readv, - .writev = fat_file_writev, + .writev = generic_file_writev, .aio_read = generic_file_aio_read, - .aio_write = fat_file_aio_write, + .aio_write = generic_file_aio_write, .mmap = generic_file_mmap, .ioctl = fat_generic_ioctl, .fsync = file_fsync, diff -puN fs/fat/inode.c~fat-miss-sync-issues-on-sync-mount-miss-sync-on-write fs/fat/inode.c --- devel/fs/fat/inode.c~fat-miss-sync-issues-on-sync-mount-miss-sync-on-write 2005-09-15 18:55:43.000000000 -0700 +++ devel-akpm/fs/fat/inode.c 2005-09-15 18:55:43.000000000 -0700 @@ -102,6 +102,19 @@ static int fat_prepare_write(struct file &MSDOS_I(page->mapping->host)->mmu_private); } +static int fat_commit_write(struct file *file, struct page *page, + unsigned from, unsigned to) +{ + struct inode *inode = page->mapping->host; + int err = generic_commit_write(file, page, from, to); + if (!err && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) { + inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; + MSDOS_I(inode)->i_attrs |= ATTR_ARCH; + mark_inode_dirty(inode); + } + return err; +} + static sector_t _fat_bmap(struct address_space *mapping, sector_t block) { return generic_block_bmap(mapping, block, fat_get_block); @@ -112,7 +125,7 @@ static struct address_space_operations f .writepage = fat_writepage, .sync_page = block_sync_page, .prepare_write = fat_prepare_write, - .commit_write = generic_commit_write, + .commit_write = fat_commit_write, .bmap = _fat_bmap }; _