linux-2.6.33/blkdev_aio_write()

参照元†

説明†

• パス: linux-2.6.33/fs/block_dev.c

• FIXME: これは何？
  • 説明

引数†

• struct kiocb *iocb
  • linux-2.6.33/kiocb
• const struct iovec *iov
  • linux-2.6.33/iovec
• unsigned long nr_segs
• loff_t pos

返り値†

• ssize_t

参考†

実装†

/*
 * 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;

• • linux-2.6.33/file

	BUG_ON(iocb->ki_pos != pos);

• • linux-2.6.33/BUG_ON()

	ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);

• • linux-2.6.33/__generic_file_aio_write()

	if (ret > 0 || ret == -EIOCBQUEUED) {
		ssize_t err;

		err = generic_write_sync(file, pos, ret);
		if (err < 0 && ret > 0)
			ret = err;

• • linux-2.6.33/generic_write_sync()

	}
	return ret;
}
EXPORT_SYMBOL_GPL(blkdev_aio_write);

• GPL のモジュールにのみシンボルを公開する。
  • linux-2.6.33/EXPORT_SYMBOL_GPL()

コメント†

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• katsuhiro

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