qemu/hw/scsi-disk.c

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/*
* SCSI Device emulation
*
* Copyright (c) 2006 CodeSourcery.
* Based on code by Fabrice Bellard
*
* Written by Paul Brook
* Modifications:
* 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
* when the allocation length of CDB is smaller
* than 36.
* 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
* MODE SENSE response.
*
* This code is licenced under the LGPL.
*
* Note that this file only handles the SCSI architecture model and device
* commands. Emulation of interface/link layer protocols is handled by
* the host adapter emulator.
*/
//#define DEBUG_SCSI
#ifdef DEBUG_SCSI
#define DPRINTF(fmt, ...) \
do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#define BADF(fmt, ...) \
do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
#include "qemu-common.h"
#include "qemu-error.h"
#include "scsi.h"
#include "scsi-defs.h"
#include "sysemu.h"
#include "blockdev.h"
#define SCSI_DMA_BUF_SIZE 131072
#define SCSI_MAX_INQUIRY_LEN 256
#define SCSI_REQ_STATUS_RETRY 0x01
#define SCSI_REQ_STATUS_RETRY_TYPE_MASK 0x06
#define SCSI_REQ_STATUS_RETRY_READ 0x00
#define SCSI_REQ_STATUS_RETRY_WRITE 0x02
#define SCSI_REQ_STATUS_RETRY_FLUSH 0x04
typedef struct SCSIDiskState SCSIDiskState;
typedef struct SCSISense {
uint8_t key;
} SCSISense;
typedef struct SCSIDiskReq {
SCSIRequest req;
/* ??? We should probably keep track of whether the data transfer is
a read or a write. Currently we rely on the host getting it right. */
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
uint64_t sector;
uint32_t sector_count;
struct iovec iov;
QEMUIOVector qiov;
uint32_t status;
} SCSIDiskReq;
struct SCSIDiskState
{
SCSIDevice qdev;
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
BlockDriverState *bs;
/* The qemu block layer uses a fixed 512 byte sector size.
This is the number of 512 byte blocks in a single scsi sector. */
int cluster_size;
uint32_t removable;
uint64_t max_lba;
Fix VM state change handlers running out of order When a VM state change handler changes VM state, other VM state change handlers can see the state transitions out of order. bmdma_map(), scsi_disk_init() and virtio_blk_init() install VM state change handlers to restart DMA. These handlers can vm_stop() by running into a write error on a drive with werror=stop. This throws the VM state change handler callback into disarray. Here's an example case I observed: 0. The virtual IDE drive goes south. All future writes return errors. 1. Something encounters a write error, and duly stops the VM with vm_stop(). 2. vm_stop() calls vm_state_notify(0). 3. vm_state_notify() runs the callbacks in list vm_change_state_head. It contains ide_dma_restart_cb() installed by bmdma_map(). It also contains audio_vm_change_state_handler() installed by audio_init(). 4. audio_vm_change_state_handler() stops audio stuff. 5. User continues VM with monitor command "c". This runs vm_start(). 6. vm_start() calls vm_state_notify(1). 7. vm_state_notify() runs the callbacks in vm_change_state_head. 8. ide_dma_restart_cb() happens to come first. It does its work, runs into a write error, and duly stops the VM with vm_stop(). 9. vm_stop() runs vm_state_notify(0). 10. vm_state_notify() runs the callbacks in vm_change_state_head. 11. audio_vm_change_state_handler() stops audio stuff. Which isn't running. 12. vm_stop() finishes, ide_dma_restart_cb() finishes, step 7's vm_state_notify() resumes running handlers. 13. audio_vm_change_state_handler() starts audio stuff. Oopsie. Fix this by moving the actual write from each VM state change handler into a new bottom half (suggested by Gleb Natapov). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-28 22:33:41 +04:00
QEMUBH *bh;
char *version;
char *serial;
SCSISense sense;
};
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type);
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf);
static SCSIDiskReq *scsi_new_request(SCSIDiskState *s, uint32_t tag,
uint32_t lun)
{
SCSIRequest *req;
SCSIDiskReq *r;
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
r = DO_UPCAST(SCSIDiskReq, req, req);
r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE);
return r;
}
static void scsi_remove_request(SCSIDiskReq *r)
{
qemu_vfree(r->iov.iov_base);
scsi_req_free(&r->req);
}
static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag)
{
return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag));
}
static void scsi_disk_clear_sense(SCSIDiskState *s)
{
memset(&s->sense, 0, sizeof(s->sense));
}
static void scsi_disk_set_sense(SCSIDiskState *s, uint8_t key)
{
s->sense.key = key;
}
static void scsi_req_set_status(SCSIDiskReq *r, int status, int sense_code)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
r->req.status = status;
scsi_disk_set_sense(s, sense_code);
}
/* Helper function for command completion. */
static void scsi_command_complete(SCSIDiskReq *r, int status, int sense)
{
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n",
r->req.tag, status, sense);
scsi_req_set_status(r, status, sense);
scsi_req_complete(&r->req);
scsi_remove_request(r);
}
/* Cancel a pending data transfer. */
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
DPRINTF("Cancel tag=0x%x\n", tag);
r = scsi_find_request(s, tag);
if (r) {
if (r->req.aiocb)
bdrv_aio_cancel(r->req.aiocb);
r->req.aiocb = NULL;
scsi_remove_request(r);
}
}
static void scsi_read_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
int n;
r->req.aiocb = NULL;
if (ret) {
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
return;
}
}
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
n = r->iov.iov_len / 512;
r->sector += n;
r->sector_count -= n;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
}
static void scsi_read_request(SCSIDiskReq *r)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint32_t n;
if (r->sector_count == (uint32_t)-1) {
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
r->sector_count = 0;
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
return;
}
DPRINTF("Read sector_count=%d\n", r->sector_count);
if (r->sector_count == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
return;
}
/* No data transfer may already be in progress */
assert(r->req.aiocb == NULL);
n = r->sector_count;
if (n > SCSI_DMA_BUF_SIZE / 512)
n = SCSI_DMA_BUF_SIZE / 512;
r->iov.iov_len = n * 512;
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n,
scsi_read_complete, r);
if (r->req.aiocb == NULL) {
scsi_read_complete(r, -EIO);
}
}
/* Read more data from scsi device into buffer. */
static void scsi_read_data(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
r = scsi_find_request(s, tag);
if (!r) {
BADF("Bad read tag 0x%x\n", tag);
/* ??? This is the wrong error. */
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
return;
}
scsi_read_request(r);
}
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type)
{
int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
BlockErrorAction action = bdrv_get_on_error(s->bs, is_read);
if (action == BLOCK_ERR_IGNORE) {
bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read);
return 0;
}
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|| action == BLOCK_ERR_STOP_ANY) {
type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK;
r->status |= SCSI_REQ_STATUS_RETRY | type;
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
vm_stop(VMSTOP_DISKFULL);
} else {
if (type == SCSI_REQ_STATUS_RETRY_READ) {
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
}
scsi_command_complete(r, CHECK_CONDITION,
HARDWARE_ERROR);
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read);
}
return 1;
}
static void scsi_write_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
uint32_t len;
uint32_t n;
r->req.aiocb = NULL;
if (ret) {
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
return;
}
}
n = r->iov.iov_len / 512;
r->sector += n;
r->sector_count -= n;
if (r->sector_count == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
} else {
len = r->sector_count * 512;
if (len > SCSI_DMA_BUF_SIZE) {
len = SCSI_DMA_BUF_SIZE;
}
r->iov.iov_len = len;
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len);
}
}
static void scsi_write_request(SCSIDiskReq *r)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint32_t n;
/* No data transfer may already be in progress */
assert(r->req.aiocb == NULL);
n = r->iov.iov_len / 512;
if (n) {
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n,
scsi_write_complete, r);
if (r->req.aiocb == NULL) {
scsi_write_complete(r, -EIO);
}
} else {
/* Invoke completion routine to fetch data from host. */
scsi_write_complete(r, 0);
}
}
/* Write data to a scsi device. Returns nonzero on failure.
The transfer may complete asynchronously. */
static int scsi_write_data(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
DPRINTF("Write data tag=0x%x\n", tag);
r = scsi_find_request(s, tag);
if (!r) {
BADF("Bad write tag 0x%x\n", tag);
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
return 1;
}
scsi_write_request(r);
return 0;
}
Fix VM state change handlers running out of order When a VM state change handler changes VM state, other VM state change handlers can see the state transitions out of order. bmdma_map(), scsi_disk_init() and virtio_blk_init() install VM state change handlers to restart DMA. These handlers can vm_stop() by running into a write error on a drive with werror=stop. This throws the VM state change handler callback into disarray. Here's an example case I observed: 0. The virtual IDE drive goes south. All future writes return errors. 1. Something encounters a write error, and duly stops the VM with vm_stop(). 2. vm_stop() calls vm_state_notify(0). 3. vm_state_notify() runs the callbacks in list vm_change_state_head. It contains ide_dma_restart_cb() installed by bmdma_map(). It also contains audio_vm_change_state_handler() installed by audio_init(). 4. audio_vm_change_state_handler() stops audio stuff. 5. User continues VM with monitor command "c". This runs vm_start(). 6. vm_start() calls vm_state_notify(1). 7. vm_state_notify() runs the callbacks in vm_change_state_head. 8. ide_dma_restart_cb() happens to come first. It does its work, runs into a write error, and duly stops the VM with vm_stop(). 9. vm_stop() runs vm_state_notify(0). 10. vm_state_notify() runs the callbacks in vm_change_state_head. 11. audio_vm_change_state_handler() stops audio stuff. Which isn't running. 12. vm_stop() finishes, ide_dma_restart_cb() finishes, step 7's vm_state_notify() resumes running handlers. 13. audio_vm_change_state_handler() starts audio stuff. Oopsie. Fix this by moving the actual write from each VM state change handler into a new bottom half (suggested by Gleb Natapov). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-28 22:33:41 +04:00
static void scsi_dma_restart_bh(void *opaque)
{
SCSIDiskState *s = opaque;
SCSIRequest *req;
SCSIDiskReq *r;
Fix VM state change handlers running out of order When a VM state change handler changes VM state, other VM state change handlers can see the state transitions out of order. bmdma_map(), scsi_disk_init() and virtio_blk_init() install VM state change handlers to restart DMA. These handlers can vm_stop() by running into a write error on a drive with werror=stop. This throws the VM state change handler callback into disarray. Here's an example case I observed: 0. The virtual IDE drive goes south. All future writes return errors. 1. Something encounters a write error, and duly stops the VM with vm_stop(). 2. vm_stop() calls vm_state_notify(0). 3. vm_state_notify() runs the callbacks in list vm_change_state_head. It contains ide_dma_restart_cb() installed by bmdma_map(). It also contains audio_vm_change_state_handler() installed by audio_init(). 4. audio_vm_change_state_handler() stops audio stuff. 5. User continues VM with monitor command "c". This runs vm_start(). 6. vm_start() calls vm_state_notify(1). 7. vm_state_notify() runs the callbacks in vm_change_state_head. 8. ide_dma_restart_cb() happens to come first. It does its work, runs into a write error, and duly stops the VM with vm_stop(). 9. vm_stop() runs vm_state_notify(0). 10. vm_state_notify() runs the callbacks in vm_change_state_head. 11. audio_vm_change_state_handler() stops audio stuff. Which isn't running. 12. vm_stop() finishes, ide_dma_restart_cb() finishes, step 7's vm_state_notify() resumes running handlers. 13. audio_vm_change_state_handler() starts audio stuff. Oopsie. Fix this by moving the actual write from each VM state change handler into a new bottom half (suggested by Gleb Natapov). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-28 22:33:41 +04:00
qemu_bh_delete(s->bh);
s->bh = NULL;
QTAILQ_FOREACH(req, &s->qdev.requests, next) {
r = DO_UPCAST(SCSIDiskReq, req, req);
if (r->status & SCSI_REQ_STATUS_RETRY) {
int status = r->status;
int ret;
r->status &=
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK);
switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
case SCSI_REQ_STATUS_RETRY_READ:
scsi_read_request(r);
break;
case SCSI_REQ_STATUS_RETRY_WRITE:
scsi_write_request(r);
break;
case SCSI_REQ_STATUS_RETRY_FLUSH:
ret = scsi_disk_emulate_command(r, r->iov.iov_base);
if (ret == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
}
}
}
}
}
Fix VM state change handlers running out of order When a VM state change handler changes VM state, other VM state change handlers can see the state transitions out of order. bmdma_map(), scsi_disk_init() and virtio_blk_init() install VM state change handlers to restart DMA. These handlers can vm_stop() by running into a write error on a drive with werror=stop. This throws the VM state change handler callback into disarray. Here's an example case I observed: 0. The virtual IDE drive goes south. All future writes return errors. 1. Something encounters a write error, and duly stops the VM with vm_stop(). 2. vm_stop() calls vm_state_notify(0). 3. vm_state_notify() runs the callbacks in list vm_change_state_head. It contains ide_dma_restart_cb() installed by bmdma_map(). It also contains audio_vm_change_state_handler() installed by audio_init(). 4. audio_vm_change_state_handler() stops audio stuff. 5. User continues VM with monitor command "c". This runs vm_start(). 6. vm_start() calls vm_state_notify(1). 7. vm_state_notify() runs the callbacks in vm_change_state_head. 8. ide_dma_restart_cb() happens to come first. It does its work, runs into a write error, and duly stops the VM with vm_stop(). 9. vm_stop() runs vm_state_notify(0). 10. vm_state_notify() runs the callbacks in vm_change_state_head. 11. audio_vm_change_state_handler() stops audio stuff. Which isn't running. 12. vm_stop() finishes, ide_dma_restart_cb() finishes, step 7's vm_state_notify() resumes running handlers. 13. audio_vm_change_state_handler() starts audio stuff. Oopsie. Fix this by moving the actual write from each VM state change handler into a new bottom half (suggested by Gleb Natapov). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-28 22:33:41 +04:00
static void scsi_dma_restart_cb(void *opaque, int running, int reason)
{
SCSIDiskState *s = opaque;
Fix VM state change handlers running out of order When a VM state change handler changes VM state, other VM state change handlers can see the state transitions out of order. bmdma_map(), scsi_disk_init() and virtio_blk_init() install VM state change handlers to restart DMA. These handlers can vm_stop() by running into a write error on a drive with werror=stop. This throws the VM state change handler callback into disarray. Here's an example case I observed: 0. The virtual IDE drive goes south. All future writes return errors. 1. Something encounters a write error, and duly stops the VM with vm_stop(). 2. vm_stop() calls vm_state_notify(0). 3. vm_state_notify() runs the callbacks in list vm_change_state_head. It contains ide_dma_restart_cb() installed by bmdma_map(). It also contains audio_vm_change_state_handler() installed by audio_init(). 4. audio_vm_change_state_handler() stops audio stuff. 5. User continues VM with monitor command "c". This runs vm_start(). 6. vm_start() calls vm_state_notify(1). 7. vm_state_notify() runs the callbacks in vm_change_state_head. 8. ide_dma_restart_cb() happens to come first. It does its work, runs into a write error, and duly stops the VM with vm_stop(). 9. vm_stop() runs vm_state_notify(0). 10. vm_state_notify() runs the callbacks in vm_change_state_head. 11. audio_vm_change_state_handler() stops audio stuff. Which isn't running. 12. vm_stop() finishes, ide_dma_restart_cb() finishes, step 7's vm_state_notify() resumes running handlers. 13. audio_vm_change_state_handler() starts audio stuff. Oopsie. Fix this by moving the actual write from each VM state change handler into a new bottom half (suggested by Gleb Natapov). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-28 22:33:41 +04:00
if (!running)
return;
if (!s->bh) {
s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
qemu_bh_schedule(s->bh);
}
}
/* Return a pointer to the data buffer. */
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
SCSIDiskReq *r;
r = scsi_find_request(s, tag);
if (!r) {
BADF("Bad buffer tag 0x%x\n", tag);
return NULL;
}
return (uint8_t *)r->iov.iov_base;
}
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
int buflen = 0;
if (req->cmd.buf[1] & 0x2) {
/* Command support data - optional, not implemented */
BADF("optional INQUIRY command support request not implemented\n");
return -1;
}
if (req->cmd.buf[1] & 0x1) {
/* Vital product data */
uint8_t page_code = req->cmd.buf[2];
if (req->cmd.xfer < 4) {
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
"less than 4\n", page_code, req->cmd.xfer);
return -1;
}
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
outbuf[buflen++] = 5;
} else {
outbuf[buflen++] = 0;
}
outbuf[buflen++] = page_code ; // this page
outbuf[buflen++] = 0x00;
switch (page_code) {
case 0x00: /* Supported page codes, mandatory */
{
int pages;
DPRINTF("Inquiry EVPD[Supported pages] "
"buffer size %zd\n", req->cmd.xfer);
pages = buflen++;
outbuf[buflen++] = 0x00; // list of supported pages (this page)
outbuf[buflen++] = 0x80; // unit serial number
outbuf[buflen++] = 0x83; // device identification
if (bdrv_get_type_hint(s->bs) != BDRV_TYPE_CDROM) {
outbuf[buflen++] = 0xb0; // block limits
outbuf[buflen++] = 0xb2; // thin provisioning
}
outbuf[pages] = buflen - pages - 1; // number of pages
break;
}
case 0x80: /* Device serial number, optional */
{
int l = strlen(s->serial);
if (l > req->cmd.xfer)
l = req->cmd.xfer;
if (l > 20)
l = 20;
DPRINTF("Inquiry EVPD[Serial number] "
"buffer size %zd\n", req->cmd.xfer);
outbuf[buflen++] = l;
memcpy(outbuf+buflen, s->serial, l);
buflen += l;
break;
}
case 0x83: /* Device identification page, mandatory */
{
int max_len = 255 - 8;
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
int id_len = strlen(bdrv_get_device_name(s->bs));
if (id_len > max_len)
id_len = max_len;
DPRINTF("Inquiry EVPD[Device identification] "
"buffer size %zd\n", req->cmd.xfer);
outbuf[buflen++] = 4 + id_len;
outbuf[buflen++] = 0x2; // ASCII
outbuf[buflen++] = 0; // not officially assigned
outbuf[buflen++] = 0; // reserved
outbuf[buflen++] = id_len; // length of data following
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len);
buflen += id_len;
break;
}
case 0xb0: /* block limits */
{
unsigned int unmap_sectors =
s->qdev.conf.discard_granularity / s->qdev.blocksize;
unsigned int min_io_size =
s->qdev.conf.min_io_size / s->qdev.blocksize;
unsigned int opt_io_size =
s->qdev.conf.opt_io_size / s->qdev.blocksize;
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
page_code);
return -1;
}
/* required VPD size with unmap support */
outbuf[3] = buflen = 0x3c;
memset(outbuf + 4, 0, buflen - 4);
/* optimal transfer length granularity */
outbuf[6] = (min_io_size >> 8) & 0xff;
outbuf[7] = min_io_size & 0xff;
/* optimal transfer length */
outbuf[12] = (opt_io_size >> 24) & 0xff;
outbuf[13] = (opt_io_size >> 16) & 0xff;
outbuf[14] = (opt_io_size >> 8) & 0xff;
outbuf[15] = opt_io_size & 0xff;
/* optimal unmap granularity */
outbuf[28] = (unmap_sectors >> 24) & 0xff;
outbuf[29] = (unmap_sectors >> 16) & 0xff;
outbuf[30] = (unmap_sectors >> 8) & 0xff;
outbuf[31] = unmap_sectors & 0xff;
break;
}
case 0xb2: /* thin provisioning */
{
outbuf[3] = buflen = 8;
outbuf[4] = 0;
outbuf[5] = 0x40; /* write same with unmap supported */
outbuf[6] = 0;
outbuf[7] = 0;
break;
}
default:
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
"buffer size %zd\n", page_code, req->cmd.xfer);
return -1;
}
/* done with EVPD */
return buflen;
}
/* Standard INQUIRY data */
if (req->cmd.buf[2] != 0) {
BADF("Error: Inquiry (STANDARD) page or code "
"is non-zero [%02X]\n", req->cmd.buf[2]);
return -1;
}
/* PAGE CODE == 0 */
if (req->cmd.xfer < 5) {
BADF("Error: Inquiry (STANDARD) buffer size %zd "
"is less than 5\n", req->cmd.xfer);
return -1;
}
buflen = req->cmd.xfer;
if (buflen > SCSI_MAX_INQUIRY_LEN)
buflen = SCSI_MAX_INQUIRY_LEN;
memset(outbuf, 0, buflen);
if (req->lun || req->cmd.buf[1] >> 5) {
outbuf[0] = 0x7f; /* LUN not supported */
return buflen;
}
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
outbuf[0] = 5;
outbuf[1] = 0x80;
memcpy(&outbuf[16], "QEMU CD-ROM ", 16);
} else {
outbuf[0] = 0;
outbuf[1] = s->removable ? 0x80 : 0;
memcpy(&outbuf[16], "QEMU HARDDISK ", 16);
}
memcpy(&outbuf[8], "QEMU ", 8);
memset(&outbuf[32], 0, 4);
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version)));
/*
* We claim conformance to SPC-3, which is required for guests
* to ask for modern features like READ CAPACITY(16) or the
* block characteristics VPD page by default. Not all of SPC-3
* is actually implemented, but we're good enough.
*/
outbuf[2] = 5;
outbuf[3] = 2; /* Format 2 */
if (buflen > 36) {
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */
} else {
/* If the allocation length of CDB is too small,
the additional length is not adjusted */
outbuf[4] = 36 - 5;
}
/* Sync data transfer and TCQ. */
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0);
return buflen;
}
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p,
int page_control)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
BlockDriverState *bdrv = s->bs;
int cylinders, heads, secs;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
/*
* If Changeable Values are requested, a mask denoting those mode parameters
* that are changeable shall be returned. As we currently don't support
* parameter changes via MODE_SELECT all bits are returned set to zero.
* The buffer was already menset to zero by the caller of this function.
*/
switch (page) {
case 4: /* Rigid disk device geometry page. */
p[0] = 4;
p[1] = 0x16;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
p[2] = (cylinders >> 16) & 0xff;
p[3] = (cylinders >> 8) & 0xff;
p[4] = cylinders & 0xff;
p[5] = heads & 0xff;
/* Write precomp start cylinder, disabled */
p[6] = (cylinders >> 16) & 0xff;
p[7] = (cylinders >> 8) & 0xff;
p[8] = cylinders & 0xff;
/* Reduced current start cylinder, disabled */
p[9] = (cylinders >> 16) & 0xff;
p[10] = (cylinders >> 8) & 0xff;
p[11] = cylinders & 0xff;
/* Device step rate [ns], 200ns */
p[12] = 0;
p[13] = 200;
/* Landing zone cylinder */
p[14] = 0xff;
p[15] = 0xff;
p[16] = 0xff;
/* Medium rotation rate [rpm], 5400 rpm */
p[20] = (5400 >> 8) & 0xff;
p[21] = 5400 & 0xff;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
return p[1] + 2;
case 5: /* Flexible disk device geometry page. */
p[0] = 5;
p[1] = 0x1e;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
/* Transfer rate [kbit/s], 5Mbit/s */
p[2] = 5000 >> 8;
p[3] = 5000 & 0xff;
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
p[4] = heads & 0xff;
p[5] = secs & 0xff;
p[6] = s->cluster_size * 2;
p[8] = (cylinders >> 8) & 0xff;
p[9] = cylinders & 0xff;
/* Write precomp start cylinder, disabled */
p[10] = (cylinders >> 8) & 0xff;
p[11] = cylinders & 0xff;
/* Reduced current start cylinder, disabled */
p[12] = (cylinders >> 8) & 0xff;
p[13] = cylinders & 0xff;
/* Device step rate [100us], 100us */
p[14] = 0;
p[15] = 1;
/* Device step pulse width [us], 1us */
p[16] = 1;
/* Device head settle delay [100us], 100us */
p[17] = 0;
p[18] = 1;
/* Motor on delay [0.1s], 0.1s */
p[19] = 1;
/* Motor off delay [0.1s], 0.1s */
p[20] = 1;
/* Medium rotation rate [rpm], 5400 rpm */
p[28] = (5400 >> 8) & 0xff;
p[29] = 5400 & 0xff;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
return p[1] + 2;
case 8: /* Caching page. */
p[0] = 8;
p[1] = 0x12;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
if (bdrv_enable_write_cache(s->bs)) {
p[2] = 4; /* WCE */
}
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
return p[1] + 2;
case 0x2a: /* CD Capabilities and Mechanical Status page. */
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
return 0;
p[0] = 0x2a;
p[1] = 0x14;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
if (page_control == 1) { /* Changeable Values */
return p[1] + 2;
}
p[2] = 3; // CD-R & CD-RW read
p[3] = 0; // Writing not supported
p[4] = 0x7f; /* Audio, composite, digital out,
mode 2 form 1&2, multi session */
p[5] = 0xff; /* CD DA, DA accurate, RW supported,
RW corrected, C2 errors, ISRC,
UPC, Bar code */
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0);
/* Locking supported, jumper present, eject, tray */
p[7] = 0; /* no volume & mute control, no
changer */
p[8] = (50 * 176) >> 8; // 50x read speed
p[9] = (50 * 176) & 0xff;
p[10] = 0 >> 8; // No volume
p[11] = 0 & 0xff;
p[12] = 2048 >> 8; // 2M buffer
p[13] = 2048 & 0xff;
p[14] = (16 * 176) >> 8; // 16x read speed current
p[15] = (16 * 176) & 0xff;
p[18] = (16 * 176) >> 8; // 16x write speed
p[19] = (16 * 176) & 0xff;
p[20] = (16 * 176) >> 8; // 16x write speed current
p[21] = (16 * 176) & 0xff;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
return p[1] + 2;
default:
return 0;
}
}
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
uint64_t nb_sectors;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
int page, dbd, buflen, page_control;
uint8_t *p;
uint8_t dev_specific_param;
dbd = req->cmd.buf[1] & 0x8;
page = req->cmd.buf[2] & 0x3f;
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
page_control = (req->cmd.buf[2] & 0xc0) >> 6;
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control);
memset(outbuf, 0, req->cmd.xfer);
p = outbuf;
if (bdrv_is_read_only(s->bs)) {
dev_specific_param = 0x80; /* Readonly. */
} else {
dev_specific_param = 0x00;
}
if (req->cmd.buf[0] == MODE_SENSE) {
p[1] = 0; /* Default media type. */
p[2] = dev_specific_param;
p[3] = 0; /* Block descriptor length. */
p += 4;
} else { /* MODE_SENSE_10 */
p[2] = 0; /* Default media type. */
p[3] = dev_specific_param;
p[6] = p[7] = 0; /* Block descriptor length. */
p += 8;
}
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
bdrv_get_geometry(s->bs, &nb_sectors);
if (!dbd && nb_sectors) {
if (req->cmd.buf[0] == MODE_SENSE) {
outbuf[3] = 8; /* Block descriptor length */
} else { /* MODE_SENSE_10 */
outbuf[7] = 8; /* Block descriptor length */
}
nb_sectors /= s->cluster_size;
if (nb_sectors > 0xffffff)
nb_sectors = 0;
p[0] = 0; /* media density code */
p[1] = (nb_sectors >> 16) & 0xff;
p[2] = (nb_sectors >> 8) & 0xff;
p[3] = nb_sectors & 0xff;
p[4] = 0; /* reserved */
p[5] = 0; /* bytes 5-7 are the sector size in bytes */
p[6] = s->cluster_size * 2;
p[7] = 0;
p += 8;
}
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
if (page_control == 3) { /* Saved Values */
return -1; /* ILLEGAL_REQUEST */
}
switch (page) {
case 0x04:
case 0x05:
case 0x08:
case 0x2a:
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
p += mode_sense_page(req, page, p, page_control);
break;
case 0x3f:
scsi-disk: respect the page control (PC) field in the MODE SENSE command The page control (PC) field defines the type of mode parameter values to be returned in the mode pages: PC=0 : Current values PC=1 : Changeable values PC=2 : Default values PC=3 : Saved values The current implementation always returns the same type of parameters. This is OK for Current and Default values as we don't support changes to be done by the MODE SELECT command. For Saved values the following applies (implemented by this patch): "A PC field value of 3h requests that the target return the saved values of the mode parameters. Implementation of saved page parameters is optional. Mode parameters not supported by the target shall be set to zero. If saved values are not implemented, the command shall be terminated with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST and the additional sense code set to SAVING PARAMETERS NOT SUPPORTED." For Changeable values the following applies (implemented by this patch): "A PC field value of 1h requests that the target return a mask denoting those mode parameters that are changeable. In the mask, the fields of the mode parameters that are changeable shall be set to all one bits and the fields of the mode parameters that are non-changeable (i.e. defined by the target) shall be set to all zero bits." In newer versions of the SCSI-2 spec the following clause was added. "If the logical unit does not implement changeable parameters mode pages and the device server receives a MODE SENSE command with 01b in the PC field, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB." This was not yet included in the SCSI-2 Working Drafts from 1986-1993. I assume that the variant to return CHECK CONDITION for PC=1 is not widely implemented by real devices. I have a legacy OS which fails, if MODE_SENSE returns non GOOD for PC=1. So for highest compatibility I implemented the former variant with this patch. The last Working Draft X3T9.2 Rev. 10L 7-SEP-93 can be found here: http://ldkelley.com/SCSI2/SCSI2/SCSI2-08.html#8.2.10 In mode_sense_page() this patch also avoids multiple hard coded definitions of the same mode page length. Instead I use the varable p[1]. In fact the returned length of the mode pages 4 and 5 were wrong (2 bytes less). Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-08-31 16:08:24 +04:00
p += mode_sense_page(req, 0x08, p, page_control);
p += mode_sense_page(req, 0x2a, p, page_control);
break;
default:
return -1; /* ILLEGAL_REQUEST */
}
buflen = p - outbuf;
/*
* The mode data length field specifies the length in bytes of the
* following data that is available to be transferred. The mode data
* length does not include itself.
*/
if (req->cmd.buf[0] == MODE_SENSE) {
outbuf[0] = buflen - 1;
} else { /* MODE_SENSE_10 */
outbuf[0] = ((buflen - 2) >> 8) & 0xff;
outbuf[1] = (buflen - 2) & 0xff;
}
if (buflen > req->cmd.xfer)
buflen = req->cmd.xfer;
return buflen;
}
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
int start_track, format, msf, toclen;
uint64_t nb_sectors;
msf = req->cmd.buf[1] & 2;
format = req->cmd.buf[2] & 0xf;
start_track = req->cmd.buf[6];
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
bdrv_get_geometry(s->bs, &nb_sectors);
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
nb_sectors /= s->cluster_size;
switch (format) {
case 0:
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
break;
case 1:
/* multi session : only a single session defined */
toclen = 12;
memset(outbuf, 0, 12);
outbuf[1] = 0x0a;
outbuf[2] = 0x01;
outbuf[3] = 0x01;
break;
case 2:
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
break;
default:
return -1;
}
if (toclen > req->cmd.xfer)
toclen = req->cmd.xfer;
return toclen;
}
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf)
{
SCSIRequest *req = &r->req;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
uint64_t nb_sectors;
int buflen = 0;
int ret;
switch (req->cmd.buf[0]) {
case TEST_UNIT_READY:
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
if (!bdrv_is_inserted(s->bs))
goto not_ready;
break;
case REQUEST_SENSE:
if (req->cmd.xfer < 4)
goto illegal_request;
memset(outbuf, 0, 4);
buflen = 4;
if (s->sense.key == NOT_READY && req->cmd.xfer >= 18) {
memset(outbuf, 0, 18);
buflen = 18;
outbuf[7] = 10;
/* asc 0x3a, ascq 0: Medium not present */
outbuf[12] = 0x3a;
outbuf[13] = 0;
}
outbuf[0] = 0xf0;
outbuf[1] = 0;
outbuf[2] = s->sense.key;
scsi_disk_clear_sense(s);
break;
case INQUIRY:
buflen = scsi_disk_emulate_inquiry(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case MODE_SENSE:
case MODE_SENSE_10:
buflen = scsi_disk_emulate_mode_sense(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case READ_TOC:
buflen = scsi_disk_emulate_read_toc(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case RESERVE:
if (req->cmd.buf[1] & 1)
goto illegal_request;
break;
case RESERVE_10:
if (req->cmd.buf[1] & 3)
goto illegal_request;
break;
case RELEASE:
if (req->cmd.buf[1] & 1)
goto illegal_request;
break;
case RELEASE_10:
if (req->cmd.buf[1] & 3)
goto illegal_request;
break;
case START_STOP:
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) {
/* load/eject medium */
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1));
}
break;
case ALLOW_MEDIUM_REMOVAL:
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1);
break;
case READ_CAPACITY:
/* The normal LEN field for this command is zero. */
memset(outbuf, 0, 8);
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
bdrv_get_geometry(s->bs, &nb_sectors);
if (!nb_sectors)
goto not_ready;
nb_sectors /= s->cluster_size;
/* Returned value is the address of the last sector. */
nb_sectors--;
/* Remember the new size for read/write sanity checking. */
s->max_lba = nb_sectors;
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
if (nb_sectors > UINT32_MAX)
nb_sectors = UINT32_MAX;
outbuf[0] = (nb_sectors >> 24) & 0xff;
outbuf[1] = (nb_sectors >> 16) & 0xff;
outbuf[2] = (nb_sectors >> 8) & 0xff;
outbuf[3] = nb_sectors & 0xff;
outbuf[4] = 0;
outbuf[5] = 0;
outbuf[6] = s->cluster_size * 2;
outbuf[7] = 0;
buflen = 8;
break;
case SYNCHRONIZE_CACHE:
ret = bdrv_flush(s->bs);
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
return -1;
}
}
break;
case GET_CONFIGURATION:
memset(outbuf, 0, 8);
/* ??? This should probably return much more information. For now
just return the basic header indicating the CD-ROM profile. */
outbuf[7] = 8; // CD-ROM
buflen = 8;
break;
case SERVICE_ACTION_IN:
/* Service Action In subcommands. */
if ((req->cmd.buf[1] & 31) == 0x10) {
DPRINTF("SAI READ CAPACITY(16)\n");
memset(outbuf, 0, req->cmd.xfer);
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
bdrv_get_geometry(s->bs, &nb_sectors);
if (!nb_sectors)
goto not_ready;
nb_sectors /= s->cluster_size;
/* Returned value is the address of the last sector. */
nb_sectors--;
/* Remember the new size for read/write sanity checking. */
s->max_lba = nb_sectors;
outbuf[0] = (nb_sectors >> 56) & 0xff;
outbuf[1] = (nb_sectors >> 48) & 0xff;
outbuf[2] = (nb_sectors >> 40) & 0xff;
outbuf[3] = (nb_sectors >> 32) & 0xff;
outbuf[4] = (nb_sectors >> 24) & 0xff;
outbuf[5] = (nb_sectors >> 16) & 0xff;
outbuf[6] = (nb_sectors >> 8) & 0xff;
outbuf[7] = nb_sectors & 0xff;
outbuf[8] = 0;
outbuf[9] = 0;
outbuf[10] = s->cluster_size * 2;
outbuf[11] = 0;
outbuf[12] = 0;
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
/* set TPE bit if the format supports discard */
if (s->qdev.conf.discard_granularity) {
outbuf[14] = 0x80;
}
/* Protection, exponent and lowest lba field left blank. */
buflen = req->cmd.xfer;
break;
}
DPRINTF("Unsupported Service Action In\n");
goto illegal_request;
case REPORT_LUNS:
if (req->cmd.xfer < 16)
goto illegal_request;
memset(outbuf, 0, 16);
outbuf[3] = 8;
buflen = 16;
break;
case VERIFY:
break;
case REZERO_UNIT:
DPRINTF("Rezero Unit\n");
if (!bdrv_is_inserted(s->bs)) {
goto not_ready;
}
break;
default:
goto illegal_request;
}
scsi_req_set_status(r, GOOD, NO_SENSE);
return buflen;
not_ready:
scsi_command_complete(r, CHECK_CONDITION, NOT_READY);
return -1;
illegal_request:
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST);
return -1;
}
/* Execute a scsi command. Returns the length of the data expected by the
command. This will be Positive for data transfers from the device
(eg. disk reads), negative for transfers to the device (eg. disk writes),
and zero if the command does not transfer any data. */
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
uint8_t *buf, int lun)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
uint32_t len;
int is_write;
uint8_t command;
uint8_t *outbuf;
SCSIDiskReq *r;
int rc;
command = buf[0];
r = scsi_find_request(s, tag);
if (r) {
BADF("Tag 0x%x already in use\n", tag);
scsi_cancel_io(d, tag);
}
/* ??? Tags are not unique for different luns. We only implement a
single lun, so this should not matter. */
r = scsi_new_request(s, tag, lun);
outbuf = (uint8_t *)r->iov.iov_base;
is_write = 0;
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]);
if (scsi_req_parse(&r->req, buf) != 0) {
BADF("Unsupported command length, command %x\n", command);
goto fail;
}
#ifdef DEBUG_SCSI
{
int i;
for (i = 1; i < r->req.cmd.len; i++) {
printf(" 0x%02x", buf[i]);
}
printf("\n");
}
#endif
if (lun || buf[1] >> 5) {
/* Only LUN 0 supported. */
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5);
if (command != REQUEST_SENSE && command != INQUIRY)
goto fail;
}
switch (command) {
case TEST_UNIT_READY:
case REQUEST_SENSE:
case INQUIRY:
case MODE_SENSE:
case MODE_SENSE_10:
case RESERVE:
case RESERVE_10:
case RELEASE:
case RELEASE_10:
case START_STOP:
case ALLOW_MEDIUM_REMOVAL:
case READ_CAPACITY:
case SYNCHRONIZE_CACHE:
case READ_TOC:
case GET_CONFIGURATION:
case SERVICE_ACTION_IN:
case REPORT_LUNS:
case VERIFY:
case REZERO_UNIT:
rc = scsi_disk_emulate_command(r, outbuf);
if (rc < 0) {
return 0;
}
r->iov.iov_len = rc;
break;
case READ_6:
case READ_10:
case READ_12:
case READ_16:
len = r->req.cmd.xfer / d->blocksize;
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len);
if (r->req.cmd.lba > s->max_lba)
goto illegal_lba;
r->sector = r->req.cmd.lba * s->cluster_size;
r->sector_count = len * s->cluster_size;
break;
case WRITE_6:
case WRITE_10:
case WRITE_12:
case WRITE_16:
case WRITE_VERIFY:
case WRITE_VERIFY_12:
case WRITE_VERIFY_16:
len = r->req.cmd.xfer / d->blocksize;
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n",
(command & 0xe) == 0xe ? "And Verify " : "",
r->req.cmd.lba, len);
if (r->req.cmd.lba > s->max_lba)
goto illegal_lba;
r->sector = r->req.cmd.lba * s->cluster_size;
r->sector_count = len * s->cluster_size;
is_write = 1;
break;
case MODE_SELECT:
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer);
/* We don't support mode parameter changes.
Allow the mode parameter header + block descriptors only. */
if (r->req.cmd.xfer > 12) {
goto fail;
}
break;
case MODE_SELECT_10:
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer);
/* We don't support mode parameter changes.
Allow the mode parameter header + block descriptors only. */
if (r->req.cmd.xfer > 16) {
goto fail;
}
break;
case SEEK_6:
case SEEK_10:
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10,
r->req.cmd.lba);
if (r->req.cmd.lba > s->max_lba) {
goto illegal_lba;
}
break;
case WRITE_SAME_16:
len = r->req.cmd.xfer / d->blocksize;
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n",
r->req.cmd.lba, len);
if (r->req.cmd.lba > s->max_lba) {
goto illegal_lba;
}
/*
* We only support WRITE SAME with the unmap bit set for now.
*/
if (!(buf[1] & 0x8)) {
goto fail;
}
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size,
len * s->cluster_size);
if (rc < 0) {
/* XXX: better error code ?*/
goto fail;
}
break;
default:
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]);
fail:
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST);
return 0;
illegal_lba:
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
return 0;
}
if (r->sector_count == 0 && r->iov.iov_len == 0) {
scsi_command_complete(r, GOOD, NO_SENSE);
}
len = r->sector_count * 512 + r->iov.iov_len;
if (is_write) {
return -len;
} else {
if (!r->sector_count)
r->sector_count = -1;
return len;
}
}
static void scsi_disk_purge_requests(SCSIDiskState *s)
{
SCSIDiskReq *r;
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests));
if (r->req.aiocb) {
bdrv_aio_cancel(r->req.aiocb);
}
scsi_remove_request(r);
}
}
static void scsi_disk_reset(DeviceState *dev)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev);
uint64_t nb_sectors;
scsi_disk_purge_requests(s);
bdrv_get_geometry(s->bs, &nb_sectors);
nb_sectors /= s->cluster_size;
if (nb_sectors) {
nb_sectors--;
}
s->max_lba = nb_sectors;
}
static void scsi_destroy(SCSIDevice *dev)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
scsi_disk_purge_requests(s);
blockdev_mark_auto_del(s->qdev.conf.bs);
}
static int scsi_disk_initfn(SCSIDevice *dev)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
int is_cd;
DriveInfo *dinfo;
if (!s->qdev.conf.bs) {
error_report("scsi-disk: drive property not set");
return -1;
}
s->bs = s->qdev.conf.bs;
is_cd = bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM;
if (!is_cd && !bdrv_is_inserted(s->bs)) {
error_report("Device needs media, but drive is empty");
return -1;
}
if (!s->serial) {
/* try to fall back to value set with legacy -drive serial=... */
dinfo = drive_get_by_blockdev(s->bs);
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
}
if (!s->version) {
s->version = qemu_strdup(QEMU_VERSION);
}
if (bdrv_is_sg(s->bs)) {
error_report("scsi-disk: unwanted /dev/sg*");
return -1;
}
if (is_cd) {
s->qdev.blocksize = 2048;
} else {
s->qdev.blocksize = s->qdev.conf.logical_block_size;
}
s->cluster_size = s->qdev.blocksize / 512;
s->bs->buffer_alignment = s->qdev.blocksize;
s->qdev.type = TYPE_DISK;
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s);
bdrv_set_removable(s->bs, is_cd);
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
return 0;
}
static SCSIDeviceInfo scsi_disk_info = {
.qdev.name = "scsi-disk",
.qdev.fw_name = "disk",
.qdev.desc = "virtual scsi disk or cdrom",
.qdev.size = sizeof(SCSIDiskState),
.qdev.reset = scsi_disk_reset,
.init = scsi_disk_initfn,
.destroy = scsi_destroy,
.send_command = scsi_send_command,
.read_data = scsi_read_data,
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.qdev.props = (Property[]) {
block: add topology qdev properties Add three new qdev properties to export block topology information to the guest. This is needed to get optimal I/O alignment for RAID arrays or SSDs. The options are: - physical_block_size to specify the physical block size of the device, this is going to increase from 512 bytes to 4096 kilobytes for many modern storage devices - min_io_size to specify the minimal I/O size without performance impact, this is typically set to the RAID chunk size for arrays. - opt_io_size to specify the optimal sustained I/O size, this is typically the RAID stripe width for arrays. I decided to not auto-probe these values from blkid which might easily be possible as I don't know how to deal with these issues on migration. Note that we specificly only set the physical_block_size, and not the logial one which is the unit all I/O is described in. The reason for that is that IDE does not support increasing the logical block size and at last for now I want to stick to one meachnisms in queue and allow for easy switching of transports for a given backing image which would not be possible if scsi and virtio use real 4k sectors, while ide only uses the physical block exponent. To make this more common for the different block drivers introduce a new BlockConf structure holding all common block properties and a DEFINE_BLOCK_PROPERTIES macro to add them all together, mirroring what is done for network drivers. Also switch over all block drivers to use it, except for the floppy driver which has weird driveA/driveB properties and probably won't require any advanced block options ever. Example usage for a virtio device with 4k physical block size and 8k optimal I/O size: -drive file=scratch.img,media=disk,cache=none,id=scratch \ -device virtio-blk-pci,drive=scratch,physical_block_size=4096,opt_io_size=8192 aliguori: updated patch to take into account BLOCK events Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-11 01:37:09 +03:00
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf),
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
DEFINE_PROP_STRING("serial", SCSIDiskState, serial),
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false),
DEFINE_PROP_END_OF_LIST(),
},
};
static void scsi_disk_register_devices(void)
{
scsi_qdev_register(&scsi_disk_info);
}
device_init(scsi_disk_register_devices)