| commit | 622695a4585a786fdcd53852c7af87ed0af1af80 | |
| author | Ronnie Sahlberg <ronniesahlberg@gmail.com> | |
| Sat, 26 May 2012 04:56:41 +0000 (26 14:56 +1000) | ||
| committer | Paolo Bonzini <pbonzini@redhat.com> | |
| Mon, 2 Jul 2012 08:18:41 +0000 (2 10:18 +0200) | ||
| tree | 966a2bbdc0d9083ee704961e4ee9212e8c1f3fbe | treesnapshot (tar.gz zip) |
| parent | 983924532f61091fd90d1f2fafa4aa938c414dbb | commitdiff |
ISCSI: force use of sg for SMC and SSC devices
If the device we open is a SMC or SSC device, then force the use of sg. We
dont have any medium changer or tape emulation so only passthrough via
real sg or scsi-generic via iscsi would work anyway.
Forcing sg also makes qemu skip trying to read from the device to guess
the image format by reading from the device (find_image_format()).
SMC devices do not implement READ6/10/12/16 so it is not possible to
read from them (SSC have different CDBs).
With this patch I can successfully manage a SMC device wiht iscsi in
passthrough mode.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
[Added TYPE_TAPE handling - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If the device we open is a SMC or SSC device, then force the use of sg. We
dont have any medium changer or tape emulation so only passthrough via
real sg or scsi-generic via iscsi would work anyway.
Forcing sg also makes qemu skip trying to read from the device to guess
the image format by reading from the device (find_image_format()).
SMC devices do not implement READ6/10/12/16 so it is not possible to
read from them (SSC have different CDBs).
With this patch I can successfully manage a SMC device wiht iscsi in
passthrough mode.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
[Added TYPE_TAPE handling - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| block/iscsi.c | diffblobblamehistory |