*/
#include "qemu-common.h"
-#include "qemu-error.h"
-#include "scsi.h"
-#include "blockdev.h"
+#include "qemu/error-report.h"
+#include "hw/scsi.h"
+#include "sysemu/blockdev.h"
#ifdef __linux__
#include <sys/stat.h>
#include <unistd.h>
#include <scsi/sg.h>
-#include "scsi-defs.h"
+#include "hw/scsi-defs.h"
#define SCSI_SENSE_BUF_SIZE 96
-#define SG_ERR_DRIVER_TIMEOUT 0x06
-#define SG_ERR_DRIVER_SENSE 0x08
+#define SG_ERR_DRIVER_TIMEOUT 0x06
+#define SG_ERR_DRIVER_SENSE 0x08
+
+#define SG_ERR_DID_OK 0x00
+#define SG_ERR_DID_NO_CONNECT 0x01
+#define SG_ERR_DID_BUS_BUSY 0x02
+#define SG_ERR_DID_TIME_OUT 0x03
#ifndef MAX_UINT
#define MAX_UINT ((unsigned int)-1)
sg_io_hdr_t io_header;
} SCSIGenericReq;
+static void scsi_generic_save_request(QEMUFile *f, SCSIRequest *req)
+{
+ SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
+
+ qemu_put_sbe32s(f, &r->buflen);
+ if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ assert(!r->req.sg);
+ qemu_put_buffer(f, r->buf, r->req.cmd.xfer);
+ }
+}
+
+static void scsi_generic_load_request(QEMUFile *f, SCSIRequest *req)
+{
+ SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
+
+ qemu_get_sbe32s(f, &r->buflen);
+ if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ assert(!r->req.sg);
+ qemu_get_buffer(f, r->buf, r->req.cmd.xfer);
+ }
+}
+
static void scsi_free_request(SCSIRequest *req)
{
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
r->req.aiocb = NULL;
- if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE)
+ if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
r->req.sense_len = r->io_header.sb_len_wr;
+ }
if (ret != 0) {
switch (ret) {
break;
}
} else {
- if (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT) {
+ if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
+ r->io_header.host_status == SG_ERR_DID_BUS_BUSY ||
+ r->io_header.host_status == SG_ERR_DID_TIME_OUT ||
+ (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) {
status = BUSY;
BADF("Driver Timeout\n");
+ } else if (r->io_header.host_status) {
+ status = CHECK_CONDITION;
+ scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS));
} else if (r->io_header.status) {
status = r->io_header.status;
} else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
r, r->req.tag, status);
scsi_req_complete(&r->req, status);
+ if (!r->req.io_canceled) {
+ scsi_req_unref(&r->req);
+ }
}
/* Cancel a pending data transfer. */
DPRINTF("Cancel tag=0x%x\n", req->tag);
if (r->req.aiocb) {
bdrv_aio_cancel(r->req.aiocb);
+
+ /* This reference was left in by scsi_*_data. We take ownership of
+ * it independent of whether bdrv_aio_cancel completes the request
+ * or not. */
+ scsi_req_unref(&r->req);
}
r->req.aiocb = NULL;
}
r->io_header.flags |= SG_FLAG_DIRECT_IO;
r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r);
- if (r->req.aiocb == NULL) {
- BADF("execute_command: read failed !\n");
- return -ENOMEM;
- }
return 0;
}
static void scsi_read_complete(void * opaque, int ret)
{
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
+ SCSIDevice *s = r->req.dev;
int len;
r->req.aiocb = NULL;
if (len == 0) {
scsi_command_complete(r, 0);
} else {
+ /* Snoop READ CAPACITY output to set the blocksize. */
+ if (r->req.cmd.buf[0] == READ_CAPACITY_10) {
+ s->blocksize = ldl_be_p(&r->buf[4]);
+ s->max_lba = ldl_be_p(&r->buf[0]);
+ } else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 &&
+ (r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
+ s->blocksize = ldl_be_p(&r->buf[8]);
+ s->max_lba = ldq_be_p(&r->buf[0]);
+ }
+ bdrv_set_buffer_alignment(s->conf.bs, s->blocksize);
+
scsi_req_data(&r->req, len);
+ if (!r->req.io_canceled) {
+ scsi_req_unref(&r->req);
+ }
}
}
int ret;
DPRINTF("scsi_read_data 0x%x\n", req->tag);
+
+ /* The request is used as the AIO opaque value, so add a ref. */
+ scsi_req_ref(&r->req);
if (r->len == -1) {
scsi_command_complete(r, 0);
return;
return;
}
+ /* The request is used as the AIO opaque value, so add a ref. */
+ scsi_req_ref(&r->req);
ret = execute_command(s->conf.bs, r, SG_DXFER_TO_DEV, scsi_write_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
g_free(r->buf);
r->buflen = 0;
r->buf = NULL;
+ /* The request is used as the AIO opaque value, so add a ref. */
+ scsi_req_ref(&r->req);
ret = execute_command(s->conf.bs, r, SG_DXFER_NONE, scsi_command_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
}
}
-static int get_blocksize(BlockDriverState *bdrv)
-{
- uint8_t cmd[10];
- uint8_t buf[8];
- uint8_t sensebuf[8];
- sg_io_hdr_t io_header;
- int ret;
-
- memset(cmd, 0, sizeof(cmd));
- memset(buf, 0, sizeof(buf));
- cmd[0] = READ_CAPACITY_10;
-
- memset(&io_header, 0, sizeof(io_header));
- io_header.interface_id = 'S';
- io_header.dxfer_direction = SG_DXFER_FROM_DEV;
- io_header.dxfer_len = sizeof(buf);
- io_header.dxferp = buf;
- io_header.cmdp = cmd;
- io_header.cmd_len = sizeof(cmd);
- io_header.mx_sb_len = sizeof(sensebuf);
- io_header.sbp = sensebuf;
- io_header.timeout = 6000; /* XXX */
-
- ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
- if (ret < 0 || io_header.driver_status || io_header.host_status) {
- return -1;
- }
- return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
-}
-
static int get_stream_blocksize(BlockDriverState *bdrv)
{
uint8_t cmd[6];
static void scsi_generic_reset(DeviceState *dev)
{
- SCSIDevice *s = DO_UPCAST(SCSIDevice, qdev, dev);
+ SCSIDevice *s = SCSI_DEVICE(dev);
scsi_device_purge_requests(s, SENSE_CODE(RESET));
}
struct sg_scsi_id scsiid;
if (!s->conf.bs) {
- error_report("scsi-generic: drive property not set");
+ error_report("drive property not set");
return -1;
}
- /* check we are really using a /dev/sg* file */
- if (!bdrv_is_sg(s->conf.bs)) {
- error_report("scsi-generic: not /dev/sg*");
- return -1;
- }
-
- if (bdrv_get_on_error(s->conf.bs, 0) != BLOCK_ERR_STOP_ENOSPC) {
+ if (bdrv_get_on_error(s->conf.bs, 0) != BLOCKDEV_ON_ERROR_ENOSPC) {
error_report("Device doesn't support drive option werror");
return -1;
}
- if (bdrv_get_on_error(s->conf.bs, 1) != BLOCK_ERR_REPORT) {
+ if (bdrv_get_on_error(s->conf.bs, 1) != BLOCKDEV_ON_ERROR_REPORT) {
error_report("Device doesn't support drive option rerror");
return -1;
}
/* check we are using a driver managing SG_IO (version 3 and after */
- if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0 ||
- sg_version < 30000) {
- error_report("scsi-generic: scsi generic interface too old");
+ if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0) {
+ error_report("scsi generic interface not supported");
+ return -1;
+ }
+ if (sg_version < 30000) {
+ error_report("scsi generic interface too old");
return -1;
}
/* get LUN of the /dev/sg? */
if (bdrv_ioctl(s->conf.bs, SG_GET_SCSI_ID, &scsiid)) {
- error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed");
+ error_report("SG_GET_SCSI_ID ioctl failed");
return -1;
}
/* define device state */
s->type = scsiid.scsi_type;
DPRINTF("device type %d\n", s->type);
- if (s->type == TYPE_TAPE) {
+ if (s->type == TYPE_DISK || s->type == TYPE_ROM) {
+ add_boot_device_path(s->conf.bootindex, &s->qdev, NULL);
+ }
+
+ switch (s->type) {
+ case TYPE_TAPE:
s->blocksize = get_stream_blocksize(s->conf.bs);
if (s->blocksize == -1) {
s->blocksize = 0;
}
- } else {
- s->blocksize = get_blocksize(s->conf.bs);
- /* removable media returns 0 if not present */
- if (s->blocksize <= 0) {
- if (s->type == TYPE_ROM || s->type == TYPE_WORM) {
- s->blocksize = 2048;
- } else {
- s->blocksize = 512;
- }
- }
+ break;
+
+ /* Make a guess for block devices, we'll fix it when the guest sends.
+ * READ CAPACITY. If they don't, they likely would assume these sizes
+ * anyway. (TODO: they could also send MODE SENSE).
+ */
+ case TYPE_ROM:
+ case TYPE_WORM:
+ s->blocksize = 2048;
+ break;
+ default:
+ s->blocksize = 512;
+ break;
}
DPRINTF("block size %d\n", s->blocksize);
return 0;
}
-static SCSIReqOps scsi_generic_req_ops = {
+const SCSIReqOps scsi_generic_req_ops = {
.size = sizeof(SCSIGenericReq),
.free_req = scsi_free_request,
.send_command = scsi_send_command,
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
+ .load_request = scsi_generic_load_request,
+ .save_request = scsi_generic_save_request,
};
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
- void *hba_private)
+ uint8_t *buf, void *hba_private)
{
SCSIRequest *req;
return req;
}
-static SCSIDeviceInfo scsi_generic_info = {
- .qdev.name = "scsi-generic",
- .qdev.desc = "pass through generic scsi device (/dev/sg*)",
- .qdev.size = sizeof(SCSIDevice),
- .qdev.reset = scsi_generic_reset,
- .init = scsi_generic_initfn,
- .destroy = scsi_destroy,
- .alloc_req = scsi_new_request,
- .qdev.props = (Property[]) {
- DEFINE_BLOCK_PROPERTIES(SCSIDevice, conf),
- DEFINE_PROP_END_OF_LIST(),
- },
+static Property scsi_generic_properties[] = {
+ DEFINE_PROP_DRIVE("drive", SCSIDevice, conf.bs),
+ DEFINE_PROP_INT32("bootindex", SCSIDevice, conf.bootindex, -1),
+ DEFINE_PROP_END_OF_LIST(),
};
-static void scsi_generic_register_devices(void)
+static void scsi_generic_class_initfn(ObjectClass *klass, void *data)
{
- scsi_qdev_register(&scsi_generic_info);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
+
+ sc->init = scsi_generic_initfn;
+ sc->destroy = scsi_destroy;
+ sc->alloc_req = scsi_new_request;
+ dc->fw_name = "disk";
+ dc->desc = "pass through generic scsi device (/dev/sg*)";
+ dc->reset = scsi_generic_reset;
+ dc->props = scsi_generic_properties;
+ dc->vmsd = &vmstate_scsi_device;
}
-device_init(scsi_generic_register_devices)
+
+static const TypeInfo scsi_generic_info = {
+ .name = "scsi-generic",
+ .parent = TYPE_SCSI_DEVICE,
+ .instance_size = sizeof(SCSIDevice),
+ .class_init = scsi_generic_class_initfn,
+};
+
+static void scsi_generic_register_types(void)
+{
+ type_register_static(&scsi_generic_info);
+}
+
+type_init(scsi_generic_register_types)
#endif /* __linux__ */
projects / mirror_qemu.git / blobdiff