scsi: add bsg support
The Linux kernel supports two different versions of the SG_IO API,
namely v3 and v4. This patch adds support for version 4 of this API.
At least the sg3_utils package supports version 4 of this API. Version
4 of this API is used if /dev/bsg/H:C:I:L is used as device name.
This patch has been tested by inspecting the output of the following
commands:
modprobe scsi_debug dev_size_mb=16 delay=0
dev=$(lsscsi | sed -n '/ scsi_debug /s,^[^/]*,,p')
./strace -eioctl -s256 sg_inq $dev
echo 'Test XDWRITEREAD(10)'
bsg=/dev/bsg/$(lsscsi | sed -n '/ scsi_debug /s,^\[\([^]]\+\)\].*,\1,p')
dd if=/dev/zero bs=512 count=1 |
./strace -eioctl -s256 sg_raw -s 512 -r 1024 $bsg 53 00 00 00 00 01 00 00 01 00
* configure.ac (AC_CHECK_HEADERS): Add linux/bsg.h.
* xlat/bsg_protocol.in: New file.
* xlat/bsg_subprotocol.in: Likewise.
* scsi.c: Include them and <linux/bsg.h>.
(print_sg_io_v3_req, print_sg_io_v3_res, print_sg_io_v4_req,
print_sg_io_v4_res): New functions.
(print_sg_io_req, print_sg_io_res): Use them.
(scsi_ioctl): Update callers.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
diff --git a/configure.ac b/configure.ac
index 2be3892..b3e62bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -222,6 +222,7 @@
elf.h
inttypes.h
ioctls.h
+ linux/bsg.h
linux/falloc.h
linux/filter.h
linux/hiddev.h