From b176eedb2a8bf8014687b09c274e991548302023 Mon Sep 17 00:00:00 2001 From: Asias He Date: Fri, 14 Jun 2013 15:54:26 -0500 Subject: [PATCH] block_dev: add support for read_iter, write_iter Signed-off-by: Asias He Signed-off-by: Dave Kleikamp --- drivers/char/raw.c | 4 ++-- fs/block_dev.c | 19 +++++++++---------- include/linux/fs.h | 4 ++-- 3 files changed, 13 insertions(+), 14 deletions(-) diff --git a/drivers/char/raw.c b/drivers/char/raw.c index f3223aac4df1..db5fa4e9b9e5 100644 --- a/drivers/char/raw.c +++ b/drivers/char/raw.c @@ -285,9 +285,9 @@ static long raw_ctl_compat_ioctl(struct file *file, unsigned int cmd, static const struct file_operations raw_fops = { .read = do_sync_read, - .aio_read = generic_file_aio_read, + .read_iter = generic_file_read_iter, .write = do_sync_write, - .aio_write = blkdev_aio_write, + .write_iter = blkdev_write_iter, .fsync = blkdev_fsync, .open = raw_open, .release = raw_release, diff --git a/fs/block_dev.c b/fs/block_dev.c index 6f8c9e4e13f4..89d8ec543e65 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1508,8 +1508,7 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg) * Does not take i_mutex for the write and thus is not for general purpose * use. */ -ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *iter, loff_t pos) { struct file *file = iocb->ki_filp; struct blk_plug plug; @@ -1518,7 +1517,7 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, BUG_ON(iocb->ki_pos != pos); blk_start_plug(&plug); - ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos); + ret = __generic_file_write_iter(iocb, iter, &iocb->ki_pos); if (ret > 0 || ret == -EIOCBQUEUED) { ssize_t err; @@ -1529,10 +1528,10 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, blk_finish_plug(&plug); return ret; } -EXPORT_SYMBOL_GPL(blkdev_aio_write); +EXPORT_SYMBOL_GPL(blkdev_write_iter); -static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *iter, + loff_t pos) { struct file *file = iocb->ki_filp; struct inode *bd_inode = file->f_mapping->host; @@ -1543,8 +1542,8 @@ static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov, size -= pos; if (size < iocb->ki_left) - nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size); - return generic_file_aio_read(iocb, iov, nr_segs, pos); + iov_iter_shorten(iter, size); + return generic_file_read_iter(iocb, iter, pos); } /* @@ -1578,8 +1577,8 @@ const struct file_operations def_blk_fops = { .llseek = block_llseek, .read = do_sync_read, .write = do_sync_write, - .aio_read = blkdev_aio_read, - .aio_write = blkdev_aio_write, + .read_iter = blkdev_read_iter, + .write_iter = blkdev_write_iter, .mmap = generic_file_mmap, .fsync = blkdev_fsync, .unlocked_ioctl = block_ioctl, diff --git a/include/linux/fs.h b/include/linux/fs.h index 06f2290683a8..269ef07e6af3 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2526,8 +2526,8 @@ extern int generic_segment_checks(const struct iovec *iov, unsigned long *nr_segs, size_t *count, int access_flags); /* fs/block_dev.c */ -extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos); +extern ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *iter, + loff_t pos); extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync); extern void block_sync_page(struct page *page); -- 2.39.5