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authorChristoph Hellwig <hch@lst.de>2009-08-20 17:43:41 +0200
committerJan Kara <jack@suse.cz>2009-09-14 17:08:15 +0200
commiteef99380679e20e7edc096aa4d8a98b875404d79 (patch)
tree358a39148e8513eed9ba6aaff13f6bf660a2ce1e /fs/block_dev.c
parent918941a3f3d46c2a69971b4718aaf13b1be2f1a7 (diff)
vfs: Rename generic_file_aio_write_nolock
generic_file_aio_write_nolock() is now used only by block devices and raw character device. Filesystems should use __generic_file_aio_write() in case generic_file_aio_write() doesn't suit them. So rename the function to blkdev_aio_write() and move it to fs/blockdev.c. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 94dfda24c06..3581a4e5394 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1405,6 +1405,33 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
}
/*
+ * Write data to the block device. Only intended for the block device itself
+ * and the raw driver which basically is a fake block device.
+ *
+ * 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)
+{
+ struct file *file = iocb->ki_filp;
+ ssize_t ret;
+
+ BUG_ON(iocb->ki_pos != pos);
+
+ ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
+ if (ret > 0 || ret == -EIOCBQUEUED) {
+ ssize_t err;
+
+ err = generic_write_sync(file, pos, ret);
+ if (err < 0 && ret > 0)
+ ret = err;
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(blkdev_aio_write);
+
+/*
* Try to release a page associated with block device when the system
* is under memory pressure.
*/
@@ -1436,7 +1463,7 @@ const struct file_operations def_blk_fops = {
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write_nolock,
+ .aio_write = blkdev_aio_write,
.mmap = generic_file_mmap,
.fsync = block_fsync,
.unlocked_ioctl = block_ioctl,