7d0d69509a
BlockDriverState member removable controls whether virtual media change (monitor commands change, eject) is allowed. It is set when the "type hint" is BDRV_TYPE_CDROM or BDRV_TYPE_FLOPPY. The type hint is only set by drive_init(). It sets BDRV_TYPE_FLOPPY for if=floppy. It sets BDRV_TYPE_CDROM for media=cdrom and if=ide, scsi, xen, or none. if=ide and if=scsi work, because the type hint makes it a CD-ROM. if=xen likewise, I think. For the same reason, if=none works when it's used by ide-drive or scsi-disk. For other guest devices, there are problems: * fdc: you can't change virtual media $ qemu [...] -drive if=none,id=foo,... -global isa-fdc.driveA=foo QEMU 0.12.50 monitor - type 'help' for more information (qemu) eject foo Device 'foo' is not removable unless you add media=cdrom, but that makes it readonly. * virtio: if you add media=cdrom, you can change virtual media. If you eject, the guest gets I/O errors. If you change, the guest sees the drive's contents suddenly change. * scsi-generic: if you add media=cdrom, you can change virtual media. I didn't test what that does to the guest or the physical device, but it can't be pretty. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
1115 lines
33 KiB
C
1115 lines
33 KiB
C
/*
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* SCSI Device emulation
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*
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* Copyright (c) 2006 CodeSourcery.
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* Based on code by Fabrice Bellard
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*
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* Written by Paul Brook
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* Modifications:
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* 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
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* when the allocation length of CDB is smaller
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* than 36.
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* 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
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* MODE SENSE response.
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*
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* This code is licenced under the LGPL.
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*
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* Note that this file only handles the SCSI architecture model and device
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* commands. Emulation of interface/link layer protocols is handled by
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* the host adapter emulator.
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*/
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//#define DEBUG_SCSI
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#ifdef DEBUG_SCSI
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#define DPRINTF(fmt, ...) \
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do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) do {} while(0)
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#endif
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#define BADF(fmt, ...) \
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do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
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#include "qemu-common.h"
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#include "qemu-error.h"
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#include "scsi.h"
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#include "scsi-defs.h"
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#include "sysemu.h"
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#define SCSI_DMA_BUF_SIZE 131072
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#define SCSI_MAX_INQUIRY_LEN 256
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#define SCSI_REQ_STATUS_RETRY 0x01
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typedef struct SCSIDiskState SCSIDiskState;
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typedef struct SCSIDiskReq {
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SCSIRequest req;
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/* ??? We should probably keep track of whether the data transfer is
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a read or a write. Currently we rely on the host getting it right. */
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/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
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uint64_t sector;
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uint32_t sector_count;
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struct iovec iov;
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QEMUIOVector qiov;
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uint32_t status;
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} SCSIDiskReq;
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struct SCSIDiskState
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{
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SCSIDevice qdev;
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BlockDriverState *bs;
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/* The qemu block layer uses a fixed 512 byte sector size.
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This is the number of 512 byte blocks in a single scsi sector. */
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int cluster_size;
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uint64_t max_lba;
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QEMUBH *bh;
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char *version;
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char *serial;
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};
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static SCSIDiskReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
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{
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SCSIRequest *req;
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SCSIDiskReq *r;
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req = scsi_req_alloc(sizeof(SCSIDiskReq), d, tag, lun);
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r = DO_UPCAST(SCSIDiskReq, req, req);
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r->iov.iov_base = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
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return r;
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}
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static void scsi_remove_request(SCSIDiskReq *r)
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{
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qemu_vfree(r->iov.iov_base);
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scsi_req_free(&r->req);
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}
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static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag)
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{
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return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag));
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}
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static void scsi_req_set_status(SCSIRequest *req, int status, int sense_code)
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{
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req->status = status;
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scsi_dev_set_sense(req->dev, sense_code);
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}
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/* Helper function for command completion. */
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static void scsi_command_complete(SCSIDiskReq *r, int status, int sense)
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{
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DPRINTF("Command complete tag=0x%x status=%d sense=%d\n",
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r->req.tag, status, sense);
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scsi_req_set_status(&r->req, status, sense);
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scsi_req_complete(&r->req);
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scsi_remove_request(r);
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}
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/* Cancel a pending data transfer. */
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static void scsi_cancel_io(SCSIDevice *d, uint32_t tag)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
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SCSIDiskReq *r;
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DPRINTF("Cancel tag=0x%x\n", tag);
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r = scsi_find_request(s, tag);
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if (r) {
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if (r->req.aiocb)
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bdrv_aio_cancel(r->req.aiocb);
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r->req.aiocb = NULL;
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scsi_remove_request(r);
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}
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}
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static void scsi_read_complete(void * opaque, int ret)
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{
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SCSIDiskReq *r = (SCSIDiskReq *)opaque;
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r->req.aiocb = NULL;
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if (ret) {
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DPRINTF("IO error\n");
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
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scsi_command_complete(r, CHECK_CONDITION, NO_SENSE);
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return;
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}
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DPRINTF("Data ready tag=0x%x len=%" PRId64 "\n", r->req.tag, r->iov.iov_len);
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
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}
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/* Read more data from scsi device into buffer. */
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static void scsi_read_data(SCSIDevice *d, uint32_t tag)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
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SCSIDiskReq *r;
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uint32_t n;
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r = scsi_find_request(s, tag);
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if (!r) {
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BADF("Bad read tag 0x%x\n", tag);
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/* ??? This is the wrong error. */
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scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
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return;
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}
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if (r->sector_count == (uint32_t)-1) {
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DPRINTF("Read buf_len=%" PRId64 "\n", r->iov.iov_len);
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r->sector_count = 0;
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len);
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return;
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}
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DPRINTF("Read sector_count=%d\n", r->sector_count);
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if (r->sector_count == 0) {
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scsi_command_complete(r, GOOD, NO_SENSE);
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return;
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}
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n = r->sector_count;
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if (n > SCSI_DMA_BUF_SIZE / 512)
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n = SCSI_DMA_BUF_SIZE / 512;
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r->iov.iov_len = n * 512;
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qemu_iovec_init_external(&r->qiov, &r->iov, 1);
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r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n,
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scsi_read_complete, r);
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if (r->req.aiocb == NULL)
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scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
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r->sector += n;
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r->sector_count -= n;
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}
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static int scsi_handle_write_error(SCSIDiskReq *r, int error)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
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BlockErrorAction action = bdrv_get_on_error(s->bs, 0);
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if (action == BLOCK_ERR_IGNORE) {
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bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, 0);
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return 0;
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}
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if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
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|| action == BLOCK_ERR_STOP_ANY) {
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r->status |= SCSI_REQ_STATUS_RETRY;
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bdrv_mon_event(s->bs, BDRV_ACTION_STOP, 0);
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vm_stop(0);
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} else {
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scsi_command_complete(r, CHECK_CONDITION,
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HARDWARE_ERROR);
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bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, 0);
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}
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return 1;
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}
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static void scsi_write_complete(void * opaque, int ret)
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{
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SCSIDiskReq *r = (SCSIDiskReq *)opaque;
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uint32_t len;
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uint32_t n;
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r->req.aiocb = NULL;
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if (ret) {
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if (scsi_handle_write_error(r, -ret))
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return;
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}
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n = r->iov.iov_len / 512;
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r->sector += n;
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r->sector_count -= n;
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if (r->sector_count == 0) {
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scsi_command_complete(r, GOOD, NO_SENSE);
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} else {
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len = r->sector_count * 512;
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if (len > SCSI_DMA_BUF_SIZE) {
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len = SCSI_DMA_BUF_SIZE;
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}
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r->iov.iov_len = len;
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DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
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r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len);
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}
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}
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static void scsi_write_request(SCSIDiskReq *r)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
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uint32_t n;
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n = r->iov.iov_len / 512;
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if (n) {
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qemu_iovec_init_external(&r->qiov, &r->iov, 1);
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r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n,
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scsi_write_complete, r);
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if (r->req.aiocb == NULL)
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scsi_command_complete(r, CHECK_CONDITION,
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HARDWARE_ERROR);
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} else {
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/* Invoke completion routine to fetch data from host. */
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scsi_write_complete(r, 0);
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}
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}
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/* Write data to a scsi device. Returns nonzero on failure.
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The transfer may complete asynchronously. */
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static int scsi_write_data(SCSIDevice *d, uint32_t tag)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
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SCSIDiskReq *r;
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DPRINTF("Write data tag=0x%x\n", tag);
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r = scsi_find_request(s, tag);
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if (!r) {
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BADF("Bad write tag 0x%x\n", tag);
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scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
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return 1;
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}
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if (r->req.aiocb)
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BADF("Data transfer already in progress\n");
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scsi_write_request(r);
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return 0;
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}
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static void scsi_dma_restart_bh(void *opaque)
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{
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SCSIDiskState *s = opaque;
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SCSIRequest *req;
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SCSIDiskReq *r;
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qemu_bh_delete(s->bh);
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s->bh = NULL;
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QTAILQ_FOREACH(req, &s->qdev.requests, next) {
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r = DO_UPCAST(SCSIDiskReq, req, req);
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if (r->status & SCSI_REQ_STATUS_RETRY) {
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r->status &= ~SCSI_REQ_STATUS_RETRY;
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scsi_write_request(r);
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}
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}
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}
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static void scsi_dma_restart_cb(void *opaque, int running, int reason)
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{
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SCSIDiskState *s = opaque;
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if (!running)
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return;
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if (!s->bh) {
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s->bh = qemu_bh_new(scsi_dma_restart_bh, s);
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qemu_bh_schedule(s->bh);
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}
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}
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/* Return a pointer to the data buffer. */
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static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
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SCSIDiskReq *r;
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r = scsi_find_request(s, tag);
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if (!r) {
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BADF("Bad buffer tag 0x%x\n", tag);
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return NULL;
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}
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return (uint8_t *)r->iov.iov_base;
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}
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static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
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int buflen = 0;
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if (req->cmd.buf[1] & 0x2) {
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/* Command support data - optional, not implemented */
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BADF("optional INQUIRY command support request not implemented\n");
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return -1;
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}
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if (req->cmd.buf[1] & 0x1) {
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/* Vital product data */
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uint8_t page_code = req->cmd.buf[2];
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if (req->cmd.xfer < 4) {
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BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
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"less than 4\n", page_code, req->cmd.xfer);
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return -1;
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}
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if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
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outbuf[buflen++] = 5;
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} else {
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outbuf[buflen++] = 0;
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}
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outbuf[buflen++] = page_code ; // this page
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outbuf[buflen++] = 0x00;
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switch (page_code) {
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case 0x00: /* Supported page codes, mandatory */
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DPRINTF("Inquiry EVPD[Supported pages] "
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"buffer size %zd\n", req->cmd.xfer);
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outbuf[buflen++] = 4; // number of pages
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outbuf[buflen++] = 0x00; // list of supported pages (this page)
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outbuf[buflen++] = 0x80; // unit serial number
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outbuf[buflen++] = 0x83; // device identification
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outbuf[buflen++] = 0xb0; // block device characteristics
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break;
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case 0x80: /* Device serial number, optional */
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{
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int l = strlen(s->serial);
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if (l > req->cmd.xfer)
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l = req->cmd.xfer;
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if (l > 20)
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l = 20;
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DPRINTF("Inquiry EVPD[Serial number] "
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"buffer size %zd\n", req->cmd.xfer);
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outbuf[buflen++] = l;
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memcpy(outbuf+buflen, s->serial, l);
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buflen += l;
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break;
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}
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case 0x83: /* Device identification page, mandatory */
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{
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int max_len = 255 - 8;
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int id_len = strlen(bdrv_get_device_name(s->bs));
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if (id_len > max_len)
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id_len = max_len;
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DPRINTF("Inquiry EVPD[Device identification] "
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"buffer size %zd\n", req->cmd.xfer);
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outbuf[buflen++] = 3 + id_len;
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outbuf[buflen++] = 0x2; // ASCII
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outbuf[buflen++] = 0; // not officially assigned
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outbuf[buflen++] = 0; // reserved
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outbuf[buflen++] = id_len; // length of data following
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memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len);
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buflen += id_len;
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break;
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}
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case 0xb0: /* block device characteristics */
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{
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unsigned int min_io_size =
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s->qdev.conf.min_io_size / s->qdev.blocksize;
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unsigned int opt_io_size =
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s->qdev.conf.opt_io_size / s->qdev.blocksize;
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/* required VPD size with unmap support */
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outbuf[3] = buflen = 0x3c;
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memset(outbuf + 4, 0, buflen - 4);
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/* optimal transfer length granularity */
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outbuf[6] = (min_io_size >> 8) & 0xff;
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outbuf[7] = min_io_size & 0xff;
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/* optimal transfer length */
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outbuf[12] = (opt_io_size >> 24) & 0xff;
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outbuf[13] = (opt_io_size >> 16) & 0xff;
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outbuf[14] = (opt_io_size >> 8) & 0xff;
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outbuf[15] = opt_io_size & 0xff;
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break;
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}
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default:
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BADF("Error: unsupported Inquiry (EVPD[%02X]) "
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"buffer size %zd\n", page_code, req->cmd.xfer);
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return -1;
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}
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/* done with EVPD */
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return buflen;
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}
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|
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/* Standard INQUIRY data */
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if (req->cmd.buf[2] != 0) {
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BADF("Error: Inquiry (STANDARD) page or code "
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"is non-zero [%02X]\n", req->cmd.buf[2]);
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return -1;
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}
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|
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/* PAGE CODE == 0 */
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if (req->cmd.xfer < 5) {
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BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
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"is less than 5\n", req->cmd.xfer);
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return -1;
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}
|
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|
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buflen = req->cmd.xfer;
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if (buflen > SCSI_MAX_INQUIRY_LEN)
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buflen = SCSI_MAX_INQUIRY_LEN;
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memset(outbuf, 0, buflen);
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|
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if (req->lun || req->cmd.buf[1] >> 5) {
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outbuf[0] = 0x7f; /* LUN not supported */
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return buflen;
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}
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|
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if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
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outbuf[0] = 5;
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outbuf[1] = 0x80;
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memcpy(&outbuf[16], "QEMU CD-ROM ", 16);
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} else {
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outbuf[0] = 0;
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memcpy(&outbuf[16], "QEMU HARDDISK ", 16);
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}
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memcpy(&outbuf[8], "QEMU ", 8);
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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;
|
|
}
|
|
|
|
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p)
|
|
{
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
|
|
BlockDriverState *bdrv = s->bs;
|
|
int cylinders, heads, secs;
|
|
|
|
switch (page) {
|
|
case 4: /* Rigid disk device geometry page. */
|
|
p[0] = 4;
|
|
p[1] = 0x16;
|
|
/* 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;
|
|
return 0x16;
|
|
|
|
case 5: /* Flexible disk device geometry page. */
|
|
p[0] = 5;
|
|
p[1] = 0x1e;
|
|
/* 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;
|
|
return 0x1e;
|
|
|
|
case 8: /* Caching page. */
|
|
p[0] = 8;
|
|
p[1] = 0x12;
|
|
if (bdrv_enable_write_cache(s->bs)) {
|
|
p[2] = 4; /* WCE */
|
|
}
|
|
return 20;
|
|
|
|
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;
|
|
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 */
|
|
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;
|
|
return 22;
|
|
|
|
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;
|
|
int page, dbd, buflen;
|
|
uint8_t *p;
|
|
|
|
dbd = req->cmd.buf[1] & 0x8;
|
|
page = req->cmd.buf[2] & 0x3f;
|
|
DPRINTF("Mode Sense (page %d, len %zd)\n", page, req->cmd.xfer);
|
|
memset(outbuf, 0, req->cmd.xfer);
|
|
p = outbuf;
|
|
|
|
p[1] = 0; /* Default media type. */
|
|
p[3] = 0; /* Block descriptor length. */
|
|
if (bdrv_is_read_only(s->bs)) {
|
|
p[2] = 0x80; /* Readonly. */
|
|
}
|
|
p += 4;
|
|
|
|
bdrv_get_geometry(s->bs, &nb_sectors);
|
|
if ((~dbd) & nb_sectors) {
|
|
outbuf[3] = 8; /* Block descriptor length */
|
|
nb_sectors /= s->cluster_size;
|
|
nb_sectors--;
|
|
if (nb_sectors > 0xffffff)
|
|
nb_sectors = 0xffffff;
|
|
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;
|
|
}
|
|
|
|
switch (page) {
|
|
case 0x04:
|
|
case 0x05:
|
|
case 0x08:
|
|
case 0x2a:
|
|
p += mode_sense_page(req, page, p);
|
|
break;
|
|
case 0x3f:
|
|
p += mode_sense_page(req, 0x08, p);
|
|
p += mode_sense_page(req, 0x2a, p);
|
|
break;
|
|
}
|
|
|
|
buflen = p - outbuf;
|
|
outbuf[0] = buflen - 4;
|
|
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];
|
|
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(SCSIRequest *req, uint8_t *outbuf)
|
|
{
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
|
|
uint64_t nb_sectors;
|
|
int buflen = 0;
|
|
|
|
switch (req->cmd.buf[0]) {
|
|
case TEST_UNIT_READY:
|
|
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 (req->dev->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] = req->dev->sense.key;
|
|
scsi_dev_clear_sense(req->dev);
|
|
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:
|
|
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) {
|
|
/* load/eject medium */
|
|
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1));
|
|
}
|
|
break;
|
|
case ALLOW_MEDIUM_REMOVAL:
|
|
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);
|
|
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:
|
|
bdrv_flush(s->bs);
|
|
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);
|
|
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);
|
|
/* 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;
|
|
default:
|
|
goto illegal_request;
|
|
}
|
|
scsi_req_set_status(req, GOOD, NO_SENSE);
|
|
return buflen;
|
|
|
|
not_ready:
|
|
scsi_req_set_status(req, CHECK_CONDITION, NOT_READY);
|
|
return 0;
|
|
|
|
illegal_request:
|
|
scsi_req_set_status(req, CHECK_CONDITION, ILLEGAL_REQUEST);
|
|
return 0;
|
|
}
|
|
|
|
/* 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);
|
|
uint64_t lba;
|
|
uint32_t len;
|
|
int cmdlen;
|
|
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(d, 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]);
|
|
switch (command >> 5) {
|
|
case 0:
|
|
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) |
|
|
(((uint64_t) buf[1] & 0x1f) << 16);
|
|
len = buf[4];
|
|
cmdlen = 6;
|
|
break;
|
|
case 1:
|
|
case 2:
|
|
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) |
|
|
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24);
|
|
len = buf[8] | (buf[7] << 8);
|
|
cmdlen = 10;
|
|
break;
|
|
case 4:
|
|
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) |
|
|
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) |
|
|
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) |
|
|
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56);
|
|
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24);
|
|
cmdlen = 16;
|
|
break;
|
|
case 5:
|
|
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) |
|
|
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24);
|
|
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24);
|
|
cmdlen = 12;
|
|
break;
|
|
default:
|
|
BADF("Unsupported command length, command %x\n", command);
|
|
goto fail;
|
|
}
|
|
#ifdef DEBUG_SCSI
|
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{
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int i;
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for (i = 1; i < cmdlen; i++) {
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printf(" 0x%02x", buf[i]);
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}
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printf("\n");
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}
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#endif
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if (scsi_req_parse(&r->req, buf) != 0) {
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BADF("Unsupported command length, command %x\n", command);
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goto fail;
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}
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assert(r->req.cmd.len == cmdlen);
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assert(r->req.cmd.lba == lba);
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if (lun || buf[1] >> 5) {
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/* Only LUN 0 supported. */
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DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5);
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if (command != REQUEST_SENSE && command != INQUIRY)
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goto fail;
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}
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switch (command) {
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case TEST_UNIT_READY:
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case REQUEST_SENSE:
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case INQUIRY:
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case MODE_SENSE:
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case MODE_SENSE_10:
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case RESERVE:
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case RESERVE_10:
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case RELEASE:
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case RELEASE_10:
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case START_STOP:
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case ALLOW_MEDIUM_REMOVAL:
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case READ_CAPACITY:
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case SYNCHRONIZE_CACHE:
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case READ_TOC:
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case GET_CONFIGURATION:
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case SERVICE_ACTION_IN:
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case REPORT_LUNS:
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case VERIFY:
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rc = scsi_disk_emulate_command(&r->req, outbuf);
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if (rc > 0) {
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r->iov.iov_len = rc;
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} else {
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scsi_req_complete(&r->req);
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scsi_remove_request(r);
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return 0;
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}
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break;
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case READ_6:
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case READ_10:
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case READ_12:
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case READ_16:
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DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len);
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if (lba > s->max_lba)
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goto illegal_lba;
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r->sector = lba * s->cluster_size;
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r->sector_count = len * s->cluster_size;
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break;
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case WRITE_6:
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case WRITE_10:
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case WRITE_12:
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case WRITE_16:
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DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len);
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if (lba > s->max_lba)
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goto illegal_lba;
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r->sector = lba * s->cluster_size;
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r->sector_count = len * s->cluster_size;
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is_write = 1;
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break;
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default:
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DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]);
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fail:
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scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST);
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return 0;
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illegal_lba:
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scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR);
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return 0;
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}
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if (r->sector_count == 0 && r->iov.iov_len == 0) {
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scsi_command_complete(r, GOOD, NO_SENSE);
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}
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len = r->sector_count * 512 + r->iov.iov_len;
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if (is_write) {
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return -len;
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} else {
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if (!r->sector_count)
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r->sector_count = -1;
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return len;
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}
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}
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|
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static void scsi_disk_purge_requests(SCSIDiskState *s)
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{
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SCSIDiskReq *r;
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|
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while (!QTAILQ_EMPTY(&s->qdev.requests)) {
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r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests));
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if (r->req.aiocb) {
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bdrv_aio_cancel(r->req.aiocb);
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}
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scsi_remove_request(r);
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}
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}
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|
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static void scsi_disk_reset(DeviceState *dev)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev);
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uint64_t nb_sectors;
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|
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scsi_disk_purge_requests(s);
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bdrv_get_geometry(s->bs, &nb_sectors);
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nb_sectors /= s->cluster_size;
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if (nb_sectors) {
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nb_sectors--;
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}
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s->max_lba = nb_sectors;
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}
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|
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static void scsi_destroy(SCSIDevice *dev)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
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|
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scsi_disk_purge_requests(s);
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blockdev_mark_auto_del(s->qdev.conf.bs);
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}
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|
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static int scsi_disk_initfn(SCSIDevice *dev)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
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int is_cd;
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DriveInfo *dinfo;
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|
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if (!s->qdev.conf.bs) {
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error_report("scsi-disk: drive property not set");
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return -1;
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}
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s->bs = s->qdev.conf.bs;
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is_cd = bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM;
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|
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if (!s->serial) {
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/* try to fall back to value set with legacy -drive serial=... */
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dinfo = drive_get_by_blockdev(s->bs);
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s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
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}
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|
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if (!s->version) {
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s->version = qemu_strdup(QEMU_VERSION);
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}
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|
|
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if (bdrv_is_sg(s->bs)) {
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error_report("scsi-disk: unwanted /dev/sg*");
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return -1;
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}
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if (is_cd) {
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s->qdev.blocksize = 2048;
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} else {
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s->qdev.blocksize = s->qdev.conf.logical_block_size;
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}
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s->cluster_size = s->qdev.blocksize / 512;
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s->qdev.type = TYPE_DISK;
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qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s);
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bdrv_set_removable(s->bs, is_cd);
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return 0;
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}
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|
|
|
static SCSIDeviceInfo scsi_disk_info = {
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.qdev.name = "scsi-disk",
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.qdev.desc = "virtual scsi disk or cdrom",
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.qdev.size = sizeof(SCSIDiskState),
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.qdev.reset = scsi_disk_reset,
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.init = scsi_disk_initfn,
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.destroy = scsi_destroy,
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.send_command = scsi_send_command,
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.read_data = scsi_read_data,
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.write_data = scsi_write_data,
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.cancel_io = scsi_cancel_io,
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.get_buf = scsi_get_buf,
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|
.qdev.props = (Property[]) {
|
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DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf),
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DEFINE_PROP_STRING("ver", SCSIDiskState, version),
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DEFINE_PROP_STRING("serial", SCSIDiskState, serial),
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DEFINE_PROP_END_OF_LIST(),
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},
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};
|
|
|
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static void scsi_disk_register_devices(void)
|
|
{
|
|
scsi_qdev_register(&scsi_disk_info);
|
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}
|
|
device_init(scsi_disk_register_devices)
|