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* scsi: Introduce scsi_req_cancel_completeFam Zheng2014-09-301-0/+1
| | | | | | | | Let the aio cb do the clean up and notification job after scsi_req_cancel, in preparation for asynchronous cancellation. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi: Drop SCSIReqOps.cancel_ioFam Zheng2014-09-301-13/+0Star
| | | | | | | | | | The only two implementations are identical to each other, with nothing specific to device: they only call bdrv_aio_cancel with the SCSIRequest.aiocb. Let's move it to scsi-bus. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi: Unify request unref in scsi_req_cancelFam Zheng2014-09-301-11/+2Star
| | | | | | | | | | | | | | | | Before, scsi_req_cancel will take ownership of the canceled request and unref it. We did this because we didn't know whether AIO CB will be called or not during the cancelling, so we set the io_canceled flag before calling it, and skip unref in the potentially called callbacks, which is not very nice. Now, bdrv_aio_cancel has a stricter contract that the completion callbacks are always called, so we can remove the checks of req->io_canceled and just unref it in callbacks. It will also make implementing asynchronous cancellation easier. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi-generic: Handle canceled request in scsi_command_completeFam Zheng2014-09-301-4/+6
| | | | | | | | Now that we always called the cb in bdrv_aio_cancel, let's make scsi-generic callbacks check io_canceled flag similarly to scsi-disk. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi-generic: remove superfluous DPRINTF avoid to break compilingGonglei2014-08-261-3/+0Star
| | | | | | | | | variables lun and tag had been eliminated, break compiling when enable debug switch. Meanwhile traces provide the same information with this DPRINTF, so remove it. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi-bus: Convert DeviceClass init to realizeFam Zheng2014-08-261-19/+18Star
| | | | | | | | | | | | | | | Replace "init/destroy" with "realize/unrealize" in SCSIDeviceClass, which has errp as a parameter. So all the implementations now use error_setg instead of error_report for reporting error. Also in scsi_bus_legacy_handle_cmdline, report the error when initializing the if=scsi devices, before returning it, because in the callee, error_report is changed to error_setg. And the callers don't have the right locations (e.g. "-drive if=scsi"). Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi-block, scsi-generic: implement parse_cdbPaolo Bonzini2014-07-291-0/+7
| | | | | | | | | The callback lets the bus provide the direction and transfer count for passthrough commands, enabling passthrough of vendor-specific commands. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi: Improve error messages morePaolo Bonzini2014-04-281-2/+6
| | | | | | | | | | | Remove the "scsi-block:" prefix for error messages as suggested by Markus. Improve the previous patch by making the message the same for both scsi-block and scsi-generic, including the strerror() output in both and making an explicit reference to SG_IO. Also s/can not/cannot/. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi: Change scsi sense buf size to 252Fam Zheng2014-02-221-2/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current buffer size fails the assersion check in like hw/scsi/scsi-bus.c:1655: assert(req->sense_len <= sizeof(req->sense)); when backend (block/iscsi.c) returns more data then 96. Exercise the core dump path by booting an Gentoo ISO with scsi-generic device backed with iscsi (built with libiscsi 1.7.0): x86_64-softmmu/qemu-system-x86_64 \ -drive file=iscsi://localhost:3260/iqn.foobar/0,if=none,id=drive-disk \ -device virtio-scsi-pci,id=scsi1,bus=pci.0,addr=0x6 \ -device scsi-generic,drive=drive-disk,bus=scsi1.0,id=iscsi-disk \ -boot d \ -cdrom gentoo.iso qemu-system-x86_64: hw/scsi/scsi-bus.c:1655: scsi_req_complete: Assertion `req->sense_len <= sizeof(req->sense)' failed. According to SPC-4, section 4.5.2.1, 252 is the limit of sense data. So increase the value to fix it. Also remove duplicated define for the macro. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* block: rename buffer_alignment to guest_block_sizePaolo Bonzini2014-01-241-1/+1
| | | | | | | | | | | | | | | | | | The alignment field is now set to the value that is promised to the guest, rather than required by the host. The next patches will make QEMU aware of the host-provided values, so make this clear. The alignment is also not about memory buffers, but about the sectors on the disk, change the documentation of the field. At this point, the field is set by the device emulation, but completely ignored by the block layer. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net>
* scsi-generic: check the return value of bdrv_aio_ioctl in execute_commandPavel Hrdina2013-06-181-0/+3
| | | | | | | | | | This fixes the bug introduced by this commit ad54ae80c73f. The bdrv_aio_ioctl() still could return null and we should return an error in that case. Cc: qemu-stable@nongnu.org Signed-off-by: Pavel Hrdina <phrdina@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* scsi-generic: fix sign extension of READ CAPACITY(10) dataPaolo Bonzini2013-06-181-2/+3
| | | | | | | | | | | | | | | Issuing the READ CAPACITY(10) command in the guest will cause QEMU to update its knowledge of the maximum accessible LBA in the disk. The recorded maximum LBA will be wrong if the disk is bigger than 1TB, because ldl_be_p returns a signed int. When this is fixed, a latent bug will be unmasked. If the READ CAPACITY(10) command reported an overflow (0xFFFFFFFF), we must not overwrite the previously-known maximum accessible LBA, or the guest will fail to access the disk above the first 2TB. Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* hw: move target-independent files to subdirectoriesPaolo Bonzini2013-04-081-0/+516
This patch tackles all files that are compiled once, moving them to subdirectories of hw/. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>