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| author | Christoph Hellwig <hch@lst.de> | 2009-08-20 17:43:41 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2009-09-14 17:08:15 +0200 |
| commit | eef99380679e20e7edc096aa4d8a98b875404d79 (patch) | |
| tree | 358a39148e8513eed9ba6aaff13f6bf660a2ce1e /fs/block_dev.c | |
| parent | 918941a3f3d46c2a69971b4718aaf13b1be2f1a7 (diff) | |
| download | lwn-eef99380679e20e7edc096aa4d8a98b875404d79.tar.gz lwn-eef99380679e20e7edc096aa4d8a98b875404d79.zip | |
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.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 94dfda24c06e..3581a4e53942 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, |