From: OGAWA Hirofumi These patches adds the `-o sync' and `-o dirsync' supports to fatfs. If user specified that option, the fatfs does traditional ordered updates by using synchronous writes. If compared to before, these patches will show a improvement of robustness I think. `-o sync' - writes all buffers out before returning from syscall. `-o dirsync' - writes the directory's metadata, and unreferencing operations of data block. remaining to be done fat_generic_ioctl(), fat_notify_change(), ATTR_ARCH of fat_xxx_write[v], and probably, filling hole in cont_prepare_write(), NOTE: Since fatfs doesn't have link-count, unfortunately ->rename() is not safe order at all. It may make the shared blocks, but user shouldn't lose the data by ->rename(). If you test this, please use the dosfstools at http://www.zip.com.au/~akpm/linux/patches/stuff/fatfsprogs.tar.bz2 This is fixing several bugs of dosfstools. And "2/29" patch from hpa adds new ioctl, the attached archive is also including the commands for testing it. 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 Signed-off-by: OGAWA Hirofumi Signed-off-by: Andrew Morton --- 25-akpm/fs/fat/file.c | 31 ++++++++++++++++++++++++------- 1 files changed, 24 insertions(+), 7 deletions(-) diff -puN fs/fat/file.c~fat-fix-writev-add-aio-support fs/fat/file.c --- 25/fs/fat/file.c~fat-fix-writev-add-aio-support Sun Mar 6 17:13:04 2005 +++ 25-akpm/fs/fat/file.c Sun Mar 6 17:13:04 2005 @@ -12,13 +12,28 @@ #include #include -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, }; _