From 10e8855b945193a62801429af3aab9f7e27ef56a Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Wed, 20 Dec 2006 11:20:57 +0100 Subject: bsg: add SG_IO to SG v4 This adds SG_IO support to SG v4. Signed-off-by: FUJITA Tomonori Signed-off-by: Jens Axboe --- block/bsg.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) (limited to 'block/bsg.c') diff --git a/block/bsg.c b/block/bsg.c index 6d139d20ec99..9dc5d36a52e5 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -945,8 +945,27 @@ bsg_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void __user *uarg = (void __user *) arg; return scsi_cmd_ioctl(file, bd->disk, cmd, uarg); } - case SG_IO: - return -EINVAL; + case SG_IO: { + struct request *rq; + struct bio *bio; + struct sg_io_v4 hdr; + + if (copy_from_user(&hdr, uarg, sizeof(hdr))) + return -EFAULT; + + rq = bsg_map_hdr(bd, &hdr); + if (IS_ERR(rq)) + return PTR_ERR(rq); + + bio = rq->bio; + blk_execute_rq(bd->queue, bd->disk, rq, 0); + blk_complete_sgv4_hdr_rq(rq, &hdr, bio); + + if (copy_to_user(uarg, &hdr, sizeof(hdr))) + return -EFAULT; + else + return 0; + } /* * block device ioctls */ -- cgit v1.2.3-58-ga151