diff options
| author | FUJITA Tomonori <tomof@acm.org> | 2006-12-20 11:20:57 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-07-16 08:52:44 +0200 |
| commit | 10e8855b945193a62801429af3aab9f7e27ef56a (patch) | |
| tree | cb58b35ad27f0c9ee6b7d1adab5ce6ca3a5bc918 /block | |
| parent | 70e36eceaf897da11aa0b4d82b46ca66e65a05f1 (diff) | |
| download | lwn-10e8855b945193a62801429af3aab9f7e27ef56a.tar.gz lwn-10e8855b945193a62801429af3aab9f7e27ef56a.zip | |
bsg: add SG_IO to SG v4
This adds SG_IO support to SG v4.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/bsg.c | 23 |
1 files changed, 21 insertions, 2 deletions
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 */ |