root / hw / scsi-disk.c @ a1f0cce2
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/*
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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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#include "blockdev.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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#define SCSI_REQ_STATUS_RETRY_TYPE_MASK 0x06 |
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#define SCSI_REQ_STATUS_RETRY_READ 0x00 |
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#define SCSI_REQ_STATUS_RETRY_WRITE 0x02 |
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#define SCSI_REQ_STATUS_RETRY_FLUSH 0x04 |
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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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typedef enum { SCSI_HD, SCSI_CD } SCSIDriveKind; |
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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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uint32_t removable; |
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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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SCSISense sense; |
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SCSIDriveKind drive_kind; |
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}; |
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static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type); |
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static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf); |
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static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
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uint32_t lun) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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SCSIRequest *req; |
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SCSIDiskReq *r; |
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req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
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r = DO_UPCAST(SCSIDiskReq, req, req); |
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r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE); |
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return req;
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} |
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static void scsi_free_request(SCSIRequest *req) |
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{ |
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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qemu_vfree(r->iov.iov_base); |
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} |
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static void scsi_disk_clear_sense(SCSIDiskState *s) |
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{ |
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memset(&s->sense, 0, sizeof(s->sense)); |
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} |
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static void scsi_req_set_status(SCSIDiskReq *r, int status, SCSISense sense) |
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{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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r->req.status = status; |
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s->sense = sense; |
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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, SCSISense sense) |
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{ |
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DPRINTF("Command complete tag=0x%x status=%d sense=%d/%d/%d\n",
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r->req.tag, status, sense.key, sense.asc, sense.ascq); |
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scsi_req_set_status(r, status, sense); |
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scsi_req_complete(&r->req); |
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} |
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/* Cancel a pending data transfer. */
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static void scsi_cancel_io(SCSIRequest *req) |
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{ |
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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DPRINTF("Cancel tag=0x%x\n", req->tag);
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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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r->req.aiocb = NULL;
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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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int n;
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r->req.aiocb = NULL;
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if (ret) {
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if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
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return;
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} |
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} |
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DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
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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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scsi_req_data(&r->req, 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(SCSIRequest *req) |
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{ |
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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uint32_t n; |
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if (r->sector_count == (uint32_t)-1) { |
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DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
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r->sector_count = 0;
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scsi_req_data(&r->req, 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, SENSE_CODE(NO_SENSE)); |
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return;
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} |
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/* No data transfer may already be in progress */
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assert(r->req.aiocb == NULL);
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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_read_complete(r, -EIO); |
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} |
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} |
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static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type) |
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{ |
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int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
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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, is_read); |
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if (action == BLOCK_ERR_IGNORE) {
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bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read); |
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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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type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK; |
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r->status |= SCSI_REQ_STATUS_RETRY | type; |
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bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); |
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vm_stop(VMSTOP_DISKFULL); |
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} else {
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if (type == SCSI_REQ_STATUS_RETRY_READ) {
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scsi_req_data(&r->req, 0);
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} |
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if (error == ENOMEM) {
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scsi_command_complete(r, CHECK_CONDITION, |
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SENSE_CODE(TARGET_FAILURE)); |
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} else {
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scsi_command_complete(r, CHECK_CONDITION, |
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SENSE_CODE(IO_ERROR)); |
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} |
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bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read); |
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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_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
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return;
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} |
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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, SENSE_CODE(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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scsi_req_data(&r->req, len); |
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} |
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} |
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static int scsi_write_data(SCSIRequest *req) |
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{ |
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
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uint32_t n; |
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/* No data transfer may already be in progress */
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assert(r->req.aiocb == NULL);
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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_write_complete(r, -ENOMEM); |
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} |
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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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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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int status = r->status;
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int ret;
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r->status &= |
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~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
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switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
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case SCSI_REQ_STATUS_RETRY_READ:
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scsi_read_data(&r->req); |
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break;
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case SCSI_REQ_STATUS_RETRY_WRITE:
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scsi_write_data(&r->req); |
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break;
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case SCSI_REQ_STATUS_RETRY_FLUSH:
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ret = scsi_disk_emulate_command(r, r->iov.iov_base); |
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if (ret == 0) { |
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scsi_command_complete(r, GOOD, SENSE_CODE(NO_SENSE)); |
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} |
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} |
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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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} |
334 |
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/* Return a pointer to the data buffer. */
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static uint8_t *scsi_get_buf(SCSIRequest *req)
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{ |
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SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
339 |
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return (uint8_t *)r->iov.iov_base;
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} |
342 |
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static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
344 |
{ |
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
346 |
int buflen = 0; |
347 |
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348 |
if (req->cmd.buf[1] & 0x2) { |
349 |
/* 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; |
352 |
} |
353 |
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354 |
if (req->cmd.buf[1] & 0x1) { |
355 |
/* Vital product data */
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uint8_t page_code = req->cmd.buf[2];
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if (req->cmd.xfer < 4) { |
358 |
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; |
361 |
} |
362 |
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363 |
if (s->drive_kind == SCSI_CD) {
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364 |
outbuf[buflen++] = 5;
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} else {
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366 |
outbuf[buflen++] = 0;
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367 |
} |
368 |
outbuf[buflen++] = page_code ; // this page
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369 |
outbuf[buflen++] = 0x00;
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370 |
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371 |
switch (page_code) {
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372 |
case 0x00: /* Supported page codes, mandatory */ |
373 |
{ |
374 |
int pages;
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375 |
DPRINTF("Inquiry EVPD[Supported pages] "
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"buffer size %zd\n", req->cmd.xfer);
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pages = buflen++; |
378 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
379 |
outbuf[buflen++] = 0x80; // unit serial number |
380 |
outbuf[buflen++] = 0x83; // device identification |
381 |
if (s->drive_kind == SCSI_HD) {
|
382 |
outbuf[buflen++] = 0xb0; // block limits |
383 |
outbuf[buflen++] = 0xb2; // thin provisioning |
384 |
} |
385 |
outbuf[pages] = buflen - pages - 1; // number of pages |
386 |
break;
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} |
388 |
case 0x80: /* Device serial number, optional */ |
389 |
{ |
390 |
int l = strlen(s->serial);
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391 |
|
392 |
if (l > req->cmd.xfer)
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l = req->cmd.xfer; |
394 |
if (l > 20) |
395 |
l = 20;
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396 |
|
397 |
DPRINTF("Inquiry EVPD[Serial number] "
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398 |
"buffer size %zd\n", req->cmd.xfer);
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399 |
outbuf[buflen++] = l; |
400 |
memcpy(outbuf+buflen, s->serial, l); |
401 |
buflen += l; |
402 |
break;
|
403 |
} |
404 |
|
405 |
case 0x83: /* Device identification page, mandatory */ |
406 |
{ |
407 |
int max_len = 255 - 8; |
408 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
409 |
|
410 |
if (id_len > max_len)
|
411 |
id_len = max_len; |
412 |
DPRINTF("Inquiry EVPD[Device identification] "
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413 |
"buffer size %zd\n", req->cmd.xfer);
|
414 |
|
415 |
outbuf[buflen++] = 4 + id_len;
|
416 |
outbuf[buflen++] = 0x2; // ASCII |
417 |
outbuf[buflen++] = 0; // not officially assigned |
418 |
outbuf[buflen++] = 0; // reserved |
419 |
outbuf[buflen++] = id_len; // length of data following
|
420 |
|
421 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
422 |
buflen += id_len; |
423 |
break;
|
424 |
} |
425 |
case 0xb0: /* block limits */ |
426 |
{ |
427 |
unsigned int unmap_sectors = |
428 |
s->qdev.conf.discard_granularity / s->qdev.blocksize; |
429 |
unsigned int min_io_size = |
430 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
431 |
unsigned int opt_io_size = |
432 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
433 |
|
434 |
if (s->drive_kind == SCSI_CD) {
|
435 |
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
|
436 |
page_code); |
437 |
return -1; |
438 |
} |
439 |
/* required VPD size with unmap support */
|
440 |
outbuf[3] = buflen = 0x3c; |
441 |
|
442 |
memset(outbuf + 4, 0, buflen - 4); |
443 |
|
444 |
/* optimal transfer length granularity */
|
445 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
446 |
outbuf[7] = min_io_size & 0xff; |
447 |
|
448 |
/* optimal transfer length */
|
449 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
450 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
451 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
452 |
outbuf[15] = opt_io_size & 0xff; |
453 |
|
454 |
/* optimal unmap granularity */
|
455 |
outbuf[28] = (unmap_sectors >> 24) & 0xff; |
456 |
outbuf[29] = (unmap_sectors >> 16) & 0xff; |
457 |
outbuf[30] = (unmap_sectors >> 8) & 0xff; |
458 |
outbuf[31] = unmap_sectors & 0xff; |
459 |
break;
|
460 |
} |
461 |
case 0xb2: /* thin provisioning */ |
462 |
{ |
463 |
outbuf[3] = buflen = 8; |
464 |
outbuf[4] = 0; |
465 |
outbuf[5] = 0x40; /* write same with unmap supported */ |
466 |
outbuf[6] = 0; |
467 |
outbuf[7] = 0; |
468 |
break;
|
469 |
} |
470 |
default:
|
471 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
472 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
473 |
return -1; |
474 |
} |
475 |
/* done with EVPD */
|
476 |
return buflen;
|
477 |
} |
478 |
|
479 |
/* Standard INQUIRY data */
|
480 |
if (req->cmd.buf[2] != 0) { |
481 |
BADF("Error: Inquiry (STANDARD) page or code "
|
482 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
483 |
return -1; |
484 |
} |
485 |
|
486 |
/* PAGE CODE == 0 */
|
487 |
if (req->cmd.xfer < 5) { |
488 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
489 |
"is less than 5\n", req->cmd.xfer);
|
490 |
return -1; |
491 |
} |
492 |
|
493 |
buflen = req->cmd.xfer; |
494 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
495 |
buflen = SCSI_MAX_INQUIRY_LEN; |
496 |
|
497 |
memset(outbuf, 0, buflen);
|
498 |
|
499 |
if (req->lun || req->cmd.buf[1] >> 5) { |
500 |
outbuf[0] = 0x7f; /* LUN not supported */ |
501 |
return buflen;
|
502 |
} |
503 |
|
504 |
if (s->drive_kind == SCSI_CD) {
|
505 |
outbuf[0] = 5; |
506 |
outbuf[1] = 0x80; |
507 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
508 |
} else {
|
509 |
outbuf[0] = 0; |
510 |
outbuf[1] = s->removable ? 0x80 : 0; |
511 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
512 |
} |
513 |
memcpy(&outbuf[8], "QEMU ", 8); |
514 |
memset(&outbuf[32], 0, 4); |
515 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
516 |
/*
|
517 |
* We claim conformance to SPC-3, which is required for guests
|
518 |
* to ask for modern features like READ CAPACITY(16) or the
|
519 |
* block characteristics VPD page by default. Not all of SPC-3
|
520 |
* is actually implemented, but we're good enough.
|
521 |
*/
|
522 |
outbuf[2] = 5; |
523 |
outbuf[3] = 2; /* Format 2 */ |
524 |
|
525 |
if (buflen > 36) { |
526 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
527 |
} else {
|
528 |
/* If the allocation length of CDB is too small,
|
529 |
the additional length is not adjusted */
|
530 |
outbuf[4] = 36 - 5; |
531 |
} |
532 |
|
533 |
/* Sync data transfer and TCQ. */
|
534 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
535 |
return buflen;
|
536 |
} |
537 |
|
538 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, |
539 |
int page_control)
|
540 |
{ |
541 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
542 |
BlockDriverState *bdrv = s->bs; |
543 |
int cylinders, heads, secs;
|
544 |
|
545 |
/*
|
546 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
547 |
* that are changeable shall be returned. As we currently don't support
|
548 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
549 |
* The buffer was already menset to zero by the caller of this function.
|
550 |
*/
|
551 |
switch (page) {
|
552 |
case 4: /* Rigid disk device geometry page. */ |
553 |
p[0] = 4; |
554 |
p[1] = 0x16; |
555 |
if (page_control == 1) { /* Changeable Values */ |
556 |
return p[1] + 2; |
557 |
} |
558 |
/* if a geometry hint is available, use it */
|
559 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
560 |
p[2] = (cylinders >> 16) & 0xff; |
561 |
p[3] = (cylinders >> 8) & 0xff; |
562 |
p[4] = cylinders & 0xff; |
563 |
p[5] = heads & 0xff; |
564 |
/* Write precomp start cylinder, disabled */
|
565 |
p[6] = (cylinders >> 16) & 0xff; |
566 |
p[7] = (cylinders >> 8) & 0xff; |
567 |
p[8] = cylinders & 0xff; |
568 |
/* Reduced current start cylinder, disabled */
|
569 |
p[9] = (cylinders >> 16) & 0xff; |
570 |
p[10] = (cylinders >> 8) & 0xff; |
571 |
p[11] = cylinders & 0xff; |
572 |
/* Device step rate [ns], 200ns */
|
573 |
p[12] = 0; |
574 |
p[13] = 200; |
575 |
/* Landing zone cylinder */
|
576 |
p[14] = 0xff; |
577 |
p[15] = 0xff; |
578 |
p[16] = 0xff; |
579 |
/* Medium rotation rate [rpm], 5400 rpm */
|
580 |
p[20] = (5400 >> 8) & 0xff; |
581 |
p[21] = 5400 & 0xff; |
582 |
return p[1] + 2; |
583 |
|
584 |
case 5: /* Flexible disk device geometry page. */ |
585 |
p[0] = 5; |
586 |
p[1] = 0x1e; |
587 |
if (page_control == 1) { /* Changeable Values */ |
588 |
return p[1] + 2; |
589 |
} |
590 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
591 |
p[2] = 5000 >> 8; |
592 |
p[3] = 5000 & 0xff; |
593 |
/* if a geometry hint is available, use it */
|
594 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
595 |
p[4] = heads & 0xff; |
596 |
p[5] = secs & 0xff; |
597 |
p[6] = s->cluster_size * 2; |
598 |
p[8] = (cylinders >> 8) & 0xff; |
599 |
p[9] = cylinders & 0xff; |
600 |
/* Write precomp start cylinder, disabled */
|
601 |
p[10] = (cylinders >> 8) & 0xff; |
602 |
p[11] = cylinders & 0xff; |
603 |
/* Reduced current start cylinder, disabled */
|
604 |
p[12] = (cylinders >> 8) & 0xff; |
605 |
p[13] = cylinders & 0xff; |
606 |
/* Device step rate [100us], 100us */
|
607 |
p[14] = 0; |
608 |
p[15] = 1; |
609 |
/* Device step pulse width [us], 1us */
|
610 |
p[16] = 1; |
611 |
/* Device head settle delay [100us], 100us */
|
612 |
p[17] = 0; |
613 |
p[18] = 1; |
614 |
/* Motor on delay [0.1s], 0.1s */
|
615 |
p[19] = 1; |
616 |
/* Motor off delay [0.1s], 0.1s */
|
617 |
p[20] = 1; |
618 |
/* Medium rotation rate [rpm], 5400 rpm */
|
619 |
p[28] = (5400 >> 8) & 0xff; |
620 |
p[29] = 5400 & 0xff; |
621 |
return p[1] + 2; |
622 |
|
623 |
case 8: /* Caching page. */ |
624 |
p[0] = 8; |
625 |
p[1] = 0x12; |
626 |
if (page_control == 1) { /* Changeable Values */ |
627 |
return p[1] + 2; |
628 |
} |
629 |
if (bdrv_enable_write_cache(s->bs)) {
|
630 |
p[2] = 4; /* WCE */ |
631 |
} |
632 |
return p[1] + 2; |
633 |
|
634 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
635 |
if (s->drive_kind != SCSI_CD)
|
636 |
return 0; |
637 |
p[0] = 0x2a; |
638 |
p[1] = 0x14; |
639 |
if (page_control == 1) { /* Changeable Values */ |
640 |
return p[1] + 2; |
641 |
} |
642 |
p[2] = 3; // CD-R & CD-RW read |
643 |
p[3] = 0; // Writing not supported |
644 |
p[4] = 0x7f; /* Audio, composite, digital out, |
645 |
mode 2 form 1&2, multi session */
|
646 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
647 |
RW corrected, C2 errors, ISRC,
|
648 |
UPC, Bar code */
|
649 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
650 |
/* Locking supported, jumper present, eject, tray */
|
651 |
p[7] = 0; /* no volume & mute control, no |
652 |
changer */
|
653 |
p[8] = (50 * 176) >> 8; // 50x read speed |
654 |
p[9] = (50 * 176) & 0xff; |
655 |
p[10] = 0 >> 8; // No volume |
656 |
p[11] = 0 & 0xff; |
657 |
p[12] = 2048 >> 8; // 2M buffer |
658 |
p[13] = 2048 & 0xff; |
659 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
660 |
p[15] = (16 * 176) & 0xff; |
661 |
p[18] = (16 * 176) >> 8; // 16x write speed |
662 |
p[19] = (16 * 176) & 0xff; |
663 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
664 |
p[21] = (16 * 176) & 0xff; |
665 |
return p[1] + 2; |
666 |
|
667 |
default:
|
668 |
return 0; |
669 |
} |
670 |
} |
671 |
|
672 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
673 |
{ |
674 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
675 |
uint64_t nb_sectors; |
676 |
int page, dbd, buflen, page_control;
|
677 |
uint8_t *p; |
678 |
uint8_t dev_specific_param; |
679 |
|
680 |
dbd = req->cmd.buf[1] & 0x8; |
681 |
page = req->cmd.buf[2] & 0x3f; |
682 |
page_control = (req->cmd.buf[2] & 0xc0) >> 6; |
683 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
684 |
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control); |
685 |
memset(outbuf, 0, req->cmd.xfer);
|
686 |
p = outbuf; |
687 |
|
688 |
if (bdrv_is_read_only(s->bs)) {
|
689 |
dev_specific_param = 0x80; /* Readonly. */ |
690 |
} else {
|
691 |
dev_specific_param = 0x00;
|
692 |
} |
693 |
|
694 |
if (req->cmd.buf[0] == MODE_SENSE) { |
695 |
p[1] = 0; /* Default media type. */ |
696 |
p[2] = dev_specific_param;
|
697 |
p[3] = 0; /* Block descriptor length. */ |
698 |
p += 4;
|
699 |
} else { /* MODE_SENSE_10 */ |
700 |
p[2] = 0; /* Default media type. */ |
701 |
p[3] = dev_specific_param;
|
702 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
703 |
p += 8;
|
704 |
} |
705 |
|
706 |
bdrv_get_geometry(s->bs, &nb_sectors); |
707 |
if (!dbd && nb_sectors) {
|
708 |
if (req->cmd.buf[0] == MODE_SENSE) { |
709 |
outbuf[3] = 8; /* Block descriptor length */ |
710 |
} else { /* MODE_SENSE_10 */ |
711 |
outbuf[7] = 8; /* Block descriptor length */ |
712 |
} |
713 |
nb_sectors /= s->cluster_size; |
714 |
if (nb_sectors > 0xffffff) |
715 |
nb_sectors = 0;
|
716 |
p[0] = 0; /* media density code */ |
717 |
p[1] = (nb_sectors >> 16) & 0xff; |
718 |
p[2] = (nb_sectors >> 8) & 0xff; |
719 |
p[3] = nb_sectors & 0xff; |
720 |
p[4] = 0; /* reserved */ |
721 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
722 |
p[6] = s->cluster_size * 2; |
723 |
p[7] = 0; |
724 |
p += 8;
|
725 |
} |
726 |
|
727 |
if (page_control == 3) { /* Saved Values */ |
728 |
return -1; /* ILLEGAL_REQUEST */ |
729 |
} |
730 |
|
731 |
switch (page) {
|
732 |
case 0x04: |
733 |
case 0x05: |
734 |
case 0x08: |
735 |
case 0x2a: |
736 |
p += mode_sense_page(req, page, p, page_control); |
737 |
break;
|
738 |
case 0x3f: |
739 |
p += mode_sense_page(req, 0x08, p, page_control);
|
740 |
p += mode_sense_page(req, 0x2a, p, page_control);
|
741 |
break;
|
742 |
default:
|
743 |
return -1; /* ILLEGAL_REQUEST */ |
744 |
} |
745 |
|
746 |
buflen = p - outbuf; |
747 |
/*
|
748 |
* The mode data length field specifies the length in bytes of the
|
749 |
* following data that is available to be transferred. The mode data
|
750 |
* length does not include itself.
|
751 |
*/
|
752 |
if (req->cmd.buf[0] == MODE_SENSE) { |
753 |
outbuf[0] = buflen - 1; |
754 |
} else { /* MODE_SENSE_10 */ |
755 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
756 |
outbuf[1] = (buflen - 2) & 0xff; |
757 |
} |
758 |
if (buflen > req->cmd.xfer)
|
759 |
buflen = req->cmd.xfer; |
760 |
return buflen;
|
761 |
} |
762 |
|
763 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
764 |
{ |
765 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
766 |
int start_track, format, msf, toclen;
|
767 |
uint64_t nb_sectors; |
768 |
|
769 |
msf = req->cmd.buf[1] & 2; |
770 |
format = req->cmd.buf[2] & 0xf; |
771 |
start_track = req->cmd.buf[6];
|
772 |
bdrv_get_geometry(s->bs, &nb_sectors); |
773 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
774 |
nb_sectors /= s->cluster_size; |
775 |
switch (format) {
|
776 |
case 0: |
777 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
778 |
break;
|
779 |
case 1: |
780 |
/* multi session : only a single session defined */
|
781 |
toclen = 12;
|
782 |
memset(outbuf, 0, 12); |
783 |
outbuf[1] = 0x0a; |
784 |
outbuf[2] = 0x01; |
785 |
outbuf[3] = 0x01; |
786 |
break;
|
787 |
case 2: |
788 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
789 |
break;
|
790 |
default:
|
791 |
return -1; |
792 |
} |
793 |
if (toclen > req->cmd.xfer)
|
794 |
toclen = req->cmd.xfer; |
795 |
return toclen;
|
796 |
} |
797 |
|
798 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) |
799 |
{ |
800 |
SCSIRequest *req = &r->req; |
801 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
802 |
uint64_t nb_sectors; |
803 |
int buflen = 0; |
804 |
int ret;
|
805 |
|
806 |
switch (req->cmd.buf[0]) { |
807 |
case TEST_UNIT_READY:
|
808 |
if (!bdrv_is_inserted(s->bs))
|
809 |
goto not_ready;
|
810 |
break;
|
811 |
case REQUEST_SENSE:
|
812 |
if (req->cmd.xfer < 4) |
813 |
goto illegal_request;
|
814 |
buflen = scsi_build_sense(s->sense, outbuf, req->cmd.xfer, |
815 |
req->cmd.xfer > 13);
|
816 |
scsi_disk_clear_sense(s); |
817 |
break;
|
818 |
case INQUIRY:
|
819 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
820 |
if (buflen < 0) |
821 |
goto illegal_request;
|
822 |
break;
|
823 |
case MODE_SENSE:
|
824 |
case MODE_SENSE_10:
|
825 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
826 |
if (buflen < 0) |
827 |
goto illegal_request;
|
828 |
break;
|
829 |
case READ_TOC:
|
830 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
831 |
if (buflen < 0) |
832 |
goto illegal_request;
|
833 |
break;
|
834 |
case RESERVE:
|
835 |
if (req->cmd.buf[1] & 1) |
836 |
goto illegal_request;
|
837 |
break;
|
838 |
case RESERVE_10:
|
839 |
if (req->cmd.buf[1] & 3) |
840 |
goto illegal_request;
|
841 |
break;
|
842 |
case RELEASE:
|
843 |
if (req->cmd.buf[1] & 1) |
844 |
goto illegal_request;
|
845 |
break;
|
846 |
case RELEASE_10:
|
847 |
if (req->cmd.buf[1] & 3) |
848 |
goto illegal_request;
|
849 |
break;
|
850 |
case START_STOP:
|
851 |
if (s->drive_kind == SCSI_CD && (req->cmd.buf[4] & 2)) { |
852 |
/* load/eject medium */
|
853 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
854 |
} |
855 |
break;
|
856 |
case ALLOW_MEDIUM_REMOVAL:
|
857 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
858 |
break;
|
859 |
case READ_CAPACITY:
|
860 |
/* The normal LEN field for this command is zero. */
|
861 |
memset(outbuf, 0, 8); |
862 |
bdrv_get_geometry(s->bs, &nb_sectors); |
863 |
if (!nb_sectors)
|
864 |
goto not_ready;
|
865 |
nb_sectors /= s->cluster_size; |
866 |
/* Returned value is the address of the last sector. */
|
867 |
nb_sectors--; |
868 |
/* Remember the new size for read/write sanity checking. */
|
869 |
s->max_lba = nb_sectors; |
870 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
871 |
if (nb_sectors > UINT32_MAX)
|
872 |
nb_sectors = UINT32_MAX; |
873 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
874 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
875 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
876 |
outbuf[3] = nb_sectors & 0xff; |
877 |
outbuf[4] = 0; |
878 |
outbuf[5] = 0; |
879 |
outbuf[6] = s->cluster_size * 2; |
880 |
outbuf[7] = 0; |
881 |
buflen = 8;
|
882 |
break;
|
883 |
case SYNCHRONIZE_CACHE:
|
884 |
ret = bdrv_flush(s->bs); |
885 |
if (ret < 0) { |
886 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
|
887 |
return -1; |
888 |
} |
889 |
} |
890 |
break;
|
891 |
case GET_CONFIGURATION:
|
892 |
memset(outbuf, 0, 8); |
893 |
/* ??? This should probably return much more information. For now
|
894 |
just return the basic header indicating the CD-ROM profile. */
|
895 |
outbuf[7] = 8; // CD-ROM |
896 |
buflen = 8;
|
897 |
break;
|
898 |
case SERVICE_ACTION_IN:
|
899 |
/* Service Action In subcommands. */
|
900 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
901 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
902 |
memset(outbuf, 0, req->cmd.xfer);
|
903 |
bdrv_get_geometry(s->bs, &nb_sectors); |
904 |
if (!nb_sectors)
|
905 |
goto not_ready;
|
906 |
nb_sectors /= s->cluster_size; |
907 |
/* Returned value is the address of the last sector. */
|
908 |
nb_sectors--; |
909 |
/* Remember the new size for read/write sanity checking. */
|
910 |
s->max_lba = nb_sectors; |
911 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
912 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
913 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
914 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
915 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
916 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
917 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
918 |
outbuf[7] = nb_sectors & 0xff; |
919 |
outbuf[8] = 0; |
920 |
outbuf[9] = 0; |
921 |
outbuf[10] = s->cluster_size * 2; |
922 |
outbuf[11] = 0; |
923 |
outbuf[12] = 0; |
924 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
925 |
|
926 |
/* set TPE bit if the format supports discard */
|
927 |
if (s->qdev.conf.discard_granularity) {
|
928 |
outbuf[14] = 0x80; |
929 |
} |
930 |
|
931 |
/* Protection, exponent and lowest lba field left blank. */
|
932 |
buflen = req->cmd.xfer; |
933 |
break;
|
934 |
} |
935 |
DPRINTF("Unsupported Service Action In\n");
|
936 |
goto illegal_request;
|
937 |
case REPORT_LUNS:
|
938 |
if (req->cmd.xfer < 16) |
939 |
goto illegal_request;
|
940 |
memset(outbuf, 0, 16); |
941 |
outbuf[3] = 8; |
942 |
buflen = 16;
|
943 |
break;
|
944 |
case VERIFY:
|
945 |
break;
|
946 |
case REZERO_UNIT:
|
947 |
DPRINTF("Rezero Unit\n");
|
948 |
if (!bdrv_is_inserted(s->bs)) {
|
949 |
goto not_ready;
|
950 |
} |
951 |
break;
|
952 |
default:
|
953 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_OPCODE)); |
954 |
return -1; |
955 |
} |
956 |
scsi_req_set_status(r, GOOD, SENSE_CODE(NO_SENSE)); |
957 |
return buflen;
|
958 |
|
959 |
not_ready:
|
960 |
if (!bdrv_is_inserted(s->bs)) {
|
961 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(NO_MEDIUM)); |
962 |
} else {
|
963 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(LUN_NOT_READY)); |
964 |
} |
965 |
return -1; |
966 |
|
967 |
illegal_request:
|
968 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_FIELD)); |
969 |
return -1; |
970 |
} |
971 |
|
972 |
/* Execute a scsi command. Returns the length of the data expected by the
|
973 |
command. This will be Positive for data transfers from the device
|
974 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
975 |
and zero if the command does not transfer any data. */
|
976 |
|
977 |
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
|
978 |
{ |
979 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
980 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
981 |
int32_t len; |
982 |
int is_write;
|
983 |
uint8_t command; |
984 |
uint8_t *outbuf; |
985 |
int rc;
|
986 |
|
987 |
scsi_req_enqueue(req); |
988 |
command = buf[0];
|
989 |
outbuf = (uint8_t *)r->iov.iov_base; |
990 |
is_write = 0;
|
991 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
992 |
|
993 |
if (scsi_req_parse(&r->req, buf) != 0) { |
994 |
BADF("Unsupported command length, command %x\n", command);
|
995 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_OPCODE)); |
996 |
return 0; |
997 |
} |
998 |
#ifdef DEBUG_SCSI
|
999 |
{ |
1000 |
int i;
|
1001 |
for (i = 1; i < r->req.cmd.len; i++) { |
1002 |
printf(" 0x%02x", buf[i]);
|
1003 |
} |
1004 |
printf("\n");
|
1005 |
} |
1006 |
#endif
|
1007 |
|
1008 |
if (req->lun || buf[1] >> 5) { |
1009 |
/* Only LUN 0 supported. */
|
1010 |
DPRINTF("Unimplemented LUN %d\n", req->lun ? req->lun : buf[1] >> 5); |
1011 |
if (command != REQUEST_SENSE && command != INQUIRY) {
|
1012 |
scsi_command_complete(r, CHECK_CONDITION, |
1013 |
SENSE_CODE(LUN_NOT_SUPPORTED)); |
1014 |
return 0; |
1015 |
} |
1016 |
} |
1017 |
switch (command) {
|
1018 |
case TEST_UNIT_READY:
|
1019 |
case REQUEST_SENSE:
|
1020 |
case INQUIRY:
|
1021 |
case MODE_SENSE:
|
1022 |
case MODE_SENSE_10:
|
1023 |
case RESERVE:
|
1024 |
case RESERVE_10:
|
1025 |
case RELEASE:
|
1026 |
case RELEASE_10:
|
1027 |
case START_STOP:
|
1028 |
case ALLOW_MEDIUM_REMOVAL:
|
1029 |
case READ_CAPACITY:
|
1030 |
case SYNCHRONIZE_CACHE:
|
1031 |
case READ_TOC:
|
1032 |
case GET_CONFIGURATION:
|
1033 |
case SERVICE_ACTION_IN:
|
1034 |
case REPORT_LUNS:
|
1035 |
case VERIFY:
|
1036 |
case REZERO_UNIT:
|
1037 |
rc = scsi_disk_emulate_command(r, outbuf); |
1038 |
if (rc < 0) { |
1039 |
return 0; |
1040 |
} |
1041 |
|
1042 |
r->iov.iov_len = rc; |
1043 |
break;
|
1044 |
case READ_6:
|
1045 |
case READ_10:
|
1046 |
case READ_12:
|
1047 |
case READ_16:
|
1048 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1049 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len); |
1050 |
if (r->req.cmd.lba > s->max_lba)
|
1051 |
goto illegal_lba;
|
1052 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1053 |
r->sector_count = len * s->cluster_size; |
1054 |
break;
|
1055 |
case WRITE_6:
|
1056 |
case WRITE_10:
|
1057 |
case WRITE_12:
|
1058 |
case WRITE_16:
|
1059 |
case WRITE_VERIFY:
|
1060 |
case WRITE_VERIFY_12:
|
1061 |
case WRITE_VERIFY_16:
|
1062 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1063 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
1064 |
(command & 0xe) == 0xe ? "And Verify " : "", |
1065 |
r->req.cmd.lba, len); |
1066 |
if (r->req.cmd.lba > s->max_lba)
|
1067 |
goto illegal_lba;
|
1068 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1069 |
r->sector_count = len * s->cluster_size; |
1070 |
is_write = 1;
|
1071 |
break;
|
1072 |
case MODE_SELECT:
|
1073 |
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); |
1074 |
/* We don't support mode parameter changes.
|
1075 |
Allow the mode parameter header + block descriptors only. */
|
1076 |
if (r->req.cmd.xfer > 12) { |
1077 |
goto fail;
|
1078 |
} |
1079 |
break;
|
1080 |
case MODE_SELECT_10:
|
1081 |
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); |
1082 |
/* We don't support mode parameter changes.
|
1083 |
Allow the mode parameter header + block descriptors only. */
|
1084 |
if (r->req.cmd.xfer > 16) { |
1085 |
goto fail;
|
1086 |
} |
1087 |
break;
|
1088 |
case SEEK_6:
|
1089 |
case SEEK_10:
|
1090 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, |
1091 |
r->req.cmd.lba); |
1092 |
if (r->req.cmd.lba > s->max_lba) {
|
1093 |
goto illegal_lba;
|
1094 |
} |
1095 |
break;
|
1096 |
case WRITE_SAME_16:
|
1097 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1098 |
|
1099 |
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n", |
1100 |
r->req.cmd.lba, len); |
1101 |
|
1102 |
if (r->req.cmd.lba > s->max_lba) {
|
1103 |
goto illegal_lba;
|
1104 |
} |
1105 |
|
1106 |
/*
|
1107 |
* We only support WRITE SAME with the unmap bit set for now.
|
1108 |
*/
|
1109 |
if (!(buf[1] & 0x8)) { |
1110 |
goto fail;
|
1111 |
} |
1112 |
|
1113 |
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size, |
1114 |
len * s->cluster_size); |
1115 |
if (rc < 0) { |
1116 |
/* XXX: better error code ?*/
|
1117 |
goto fail;
|
1118 |
} |
1119 |
|
1120 |
break;
|
1121 |
default:
|
1122 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
1123 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_OPCODE)); |
1124 |
return 0; |
1125 |
fail:
|
1126 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_FIELD)); |
1127 |
return 0; |
1128 |
illegal_lba:
|
1129 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(LBA_OUT_OF_RANGE)); |
1130 |
return 0; |
1131 |
} |
1132 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1133 |
scsi_command_complete(r, GOOD, SENSE_CODE(NO_SENSE)); |
1134 |
} |
1135 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1136 |
if (is_write) {
|
1137 |
len = -len; |
1138 |
} else {
|
1139 |
if (!r->sector_count)
|
1140 |
r->sector_count = -1;
|
1141 |
} |
1142 |
return len;
|
1143 |
} |
1144 |
|
1145 |
static void scsi_disk_reset(DeviceState *dev) |
1146 |
{ |
1147 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1148 |
uint64_t nb_sectors; |
1149 |
|
1150 |
scsi_device_purge_requests(&s->qdev); |
1151 |
|
1152 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1153 |
nb_sectors /= s->cluster_size; |
1154 |
if (nb_sectors) {
|
1155 |
nb_sectors--; |
1156 |
} |
1157 |
s->max_lba = nb_sectors; |
1158 |
} |
1159 |
|
1160 |
static void scsi_destroy(SCSIDevice *dev) |
1161 |
{ |
1162 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1163 |
|
1164 |
scsi_device_purge_requests(&s->qdev); |
1165 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
1166 |
} |
1167 |
|
1168 |
static int scsi_initfn(SCSIDevice *dev, SCSIDriveKind kind) |
1169 |
{ |
1170 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1171 |
DriveInfo *dinfo; |
1172 |
|
1173 |
if (!s->qdev.conf.bs) {
|
1174 |
error_report("scsi-disk: drive property not set");
|
1175 |
return -1; |
1176 |
} |
1177 |
s->bs = s->qdev.conf.bs; |
1178 |
s->drive_kind = kind; |
1179 |
|
1180 |
if (kind == SCSI_HD && !bdrv_is_inserted(s->bs)) {
|
1181 |
error_report("Device needs media, but drive is empty");
|
1182 |
return -1; |
1183 |
} |
1184 |
|
1185 |
if (!s->serial) {
|
1186 |
/* try to fall back to value set with legacy -drive serial=... */
|
1187 |
dinfo = drive_get_by_blockdev(s->bs); |
1188 |
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
|
1189 |
} |
1190 |
|
1191 |
if (!s->version) {
|
1192 |
s->version = qemu_strdup(QEMU_VERSION); |
1193 |
} |
1194 |
|
1195 |
if (bdrv_is_sg(s->bs)) {
|
1196 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1197 |
return -1; |
1198 |
} |
1199 |
|
1200 |
if (kind == SCSI_CD) {
|
1201 |
s->qdev.blocksize = 2048;
|
1202 |
} else {
|
1203 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1204 |
} |
1205 |
s->cluster_size = s->qdev.blocksize / 512;
|
1206 |
s->bs->buffer_alignment = s->qdev.blocksize; |
1207 |
|
1208 |
s->qdev.type = TYPE_DISK; |
1209 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1210 |
bdrv_set_removable(s->bs, kind == SCSI_CD); |
1211 |
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
|
1212 |
return 0; |
1213 |
} |
1214 |
|
1215 |
static int scsi_hd_initfn(SCSIDevice *dev) |
1216 |
{ |
1217 |
return scsi_initfn(dev, SCSI_HD);
|
1218 |
} |
1219 |
|
1220 |
static int scsi_cd_initfn(SCSIDevice *dev) |
1221 |
{ |
1222 |
return scsi_initfn(dev, SCSI_CD);
|
1223 |
} |
1224 |
|
1225 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1226 |
{ |
1227 |
SCSIDriveKind kind; |
1228 |
DriveInfo *dinfo; |
1229 |
|
1230 |
if (!dev->conf.bs) {
|
1231 |
kind = SCSI_HD; /* will die in scsi_initfn() */
|
1232 |
} else {
|
1233 |
dinfo = drive_get_by_blockdev(dev->conf.bs); |
1234 |
kind = dinfo->media_cd ? SCSI_CD : SCSI_HD; |
1235 |
} |
1236 |
|
1237 |
return scsi_initfn(dev, kind);
|
1238 |
} |
1239 |
|
1240 |
#define DEFINE_SCSI_DISK_PROPERTIES() \
|
1241 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \ |
1242 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
|
1243 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial)
|
1244 |
|
1245 |
static SCSIDeviceInfo scsi_disk_info[] = {
|
1246 |
{ |
1247 |
.qdev.name = "scsi-hd",
|
1248 |
.qdev.fw_name = "disk",
|
1249 |
.qdev.desc = "virtual SCSI disk",
|
1250 |
.qdev.size = sizeof(SCSIDiskState),
|
1251 |
.qdev.reset = scsi_disk_reset, |
1252 |
.init = scsi_hd_initfn, |
1253 |
.destroy = scsi_destroy, |
1254 |
.alloc_req = scsi_new_request, |
1255 |
.free_req = scsi_free_request, |
1256 |
.send_command = scsi_send_command, |
1257 |
.read_data = scsi_read_data, |
1258 |
.write_data = scsi_write_data, |
1259 |
.cancel_io = scsi_cancel_io, |
1260 |
.get_buf = scsi_get_buf, |
1261 |
.qdev.props = (Property[]) { |
1262 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1263 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1264 |
DEFINE_PROP_END_OF_LIST(), |
1265 |
} |
1266 |
},{ |
1267 |
.qdev.name = "scsi-cd",
|
1268 |
.qdev.fw_name = "disk",
|
1269 |
.qdev.desc = "virtual SCSI CD-ROM",
|
1270 |
.qdev.size = sizeof(SCSIDiskState),
|
1271 |
.qdev.reset = scsi_disk_reset, |
1272 |
.init = scsi_cd_initfn, |
1273 |
.destroy = scsi_destroy, |
1274 |
.alloc_req = scsi_new_request, |
1275 |
.free_req = scsi_free_request, |
1276 |
.send_command = scsi_send_command, |
1277 |
.read_data = scsi_read_data, |
1278 |
.write_data = scsi_write_data, |
1279 |
.cancel_io = scsi_cancel_io, |
1280 |
.get_buf = scsi_get_buf, |
1281 |
.qdev.props = (Property[]) { |
1282 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1283 |
DEFINE_PROP_END_OF_LIST(), |
1284 |
}, |
1285 |
},{ |
1286 |
.qdev.name = "scsi-disk", /* legacy -device scsi-disk */ |
1287 |
.qdev.fw_name = "disk",
|
1288 |
.qdev.desc = "virtual SCSI disk or CD-ROM (legacy)",
|
1289 |
.qdev.size = sizeof(SCSIDiskState),
|
1290 |
.qdev.reset = scsi_disk_reset, |
1291 |
.init = scsi_disk_initfn, |
1292 |
.destroy = scsi_destroy, |
1293 |
.alloc_req = scsi_new_request, |
1294 |
.free_req = scsi_free_request, |
1295 |
.send_command = scsi_send_command, |
1296 |
.read_data = scsi_read_data, |
1297 |
.write_data = scsi_write_data, |
1298 |
.cancel_io = scsi_cancel_io, |
1299 |
.get_buf = scsi_get_buf, |
1300 |
.qdev.props = (Property[]) { |
1301 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1302 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1303 |
DEFINE_PROP_END_OF_LIST(), |
1304 |
} |
1305 |
} |
1306 |
}; |
1307 |
|
1308 |
static void scsi_disk_register_devices(void) |
1309 |
{ |
1310 |
int i;
|
1311 |
|
1312 |
for (i = 0; i < ARRAY_SIZE(scsi_disk_info); i++) { |
1313 |
scsi_qdev_register(&scsi_disk_info[i]); |
1314 |
} |
1315 |
} |
1316 |
device_init(scsi_disk_register_devices) |