*
* Written by Laurent Vivier <Laurent.Vivier@bull.net>
*
- * This code is licenced under the LGPL.
+ * This code is licensed under the LGPL.
*
*/
#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)
#endif
-typedef struct SCSIGenericState SCSIGenericState;
-
typedef struct SCSIGenericReq {
SCSIRequest req;
uint8_t *buf;
sg_io_hdr_t io_header;
} SCSIGenericReq;
-struct SCSIGenericState
-{
- SCSIDevice qdev;
- BlockDriverState *bs;
- int lun;
- int driver_status;
- uint8_t sensebuf[SCSI_SENSE_BUF_SIZE];
- uint8_t senselen;
-};
-
-static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
-{
- SCSIRequest *req;
-
- req = scsi_req_alloc(sizeof(SCSIGenericReq), d, tag, lun);
- return req;
-}
-
static void scsi_free_request(SCSIRequest *req)
{
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
- qemu_free(r->buf);
+ g_free(r->buf);
}
/* Helper function for command completion. */
static void scsi_command_complete(void *opaque, int ret)
{
+ int status;
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev);
r->req.aiocb = NULL;
- s->driver_status = r->io_header.driver_status;
- if (s->driver_status & SG_ERR_DRIVER_SENSE)
- s->senselen = r->io_header.sb_len_wr;
-
- if (ret != 0)
- r->req.status = BUSY;
- else {
- if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) {
- r->req.status = BUSY;
+ 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) {
+ case -EDOM:
+ status = TASK_SET_FULL;
+ break;
+ case -ENOMEM:
+ status = CHECK_CONDITION;
+ scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE));
+ break;
+ default:
+ status = CHECK_CONDITION;
+ scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR));
+ break;
+ }
+ } else {
+ 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.status)
- r->req.status = r->io_header.status;
- else if (s->driver_status & SG_ERR_DRIVER_SENSE)
- r->req.status = CHECK_CONDITION;
- else
- r->req.status = GOOD;
+ } 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) {
+ status = CHECK_CONDITION;
+ } else {
+ status = GOOD;
+ }
}
DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
- r, r->req.tag, r->req.status);
+ r, r->req.tag, status);
- scsi_req_complete(&r->req);
+ 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;
}
SCSIGenericReq *r, int direction,
BlockDriverCompletionFunc *complete)
{
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev);
-
r->io_header.interface_id = 'S';
r->io_header.dxfer_direction = direction;
r->io_header.dxferp = r->buf;
r->io_header.dxfer_len = r->buflen;
r->io_header.cmdp = r->req.cmd.buf;
r->io_header.cmd_len = r->req.cmd.len;
- r->io_header.mx_sb_len = sizeof(s->sensebuf);
- r->io_header.sbp = s->sensebuf;
+ r->io_header.mx_sb_len = sizeof(r->req.sense);
+ r->io_header.sbp = r->req.sense;
r->io_header.timeout = MAX_UINT;
r->io_header.usr_ptr = r;
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 -1;
- }
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);
+ }
}
}
static void scsi_read_data(SCSIRequest *req)
{
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev);
+ SCSIDevice *s = r->req.dev;
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;
}
- if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE)
- {
- s->senselen = MIN(r->len, s->senselen);
- memcpy(r->buf, s->sensebuf, s->senselen);
- r->io_header.driver_status = 0;
- r->io_header.status = 0;
- r->io_header.dxfer_len = s->senselen;
- r->len = -1;
- DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
- DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
- r->buf[0], r->buf[1], r->buf[2], r->buf[3],
- r->buf[4], r->buf[5], r->buf[6], r->buf[7]);
- scsi_req_data(&r->req, s->senselen);
- return;
- }
-
- ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete);
- if (ret == -1) {
- scsi_command_complete(r, -EINVAL);
- return;
+ ret = execute_command(s->conf.bs, r, SG_DXFER_FROM_DEV, scsi_read_complete);
+ if (ret < 0) {
+ scsi_command_complete(r, ret);
}
}
static void scsi_write_complete(void * opaque, int ret)
{
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev);
+ SCSIDevice *s = r->req.dev;
DPRINTF("scsi_write_complete() ret = %d\n", ret);
r->req.aiocb = NULL;
}
if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
- s->qdev.type == TYPE_TAPE) {
- s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
- DPRINTF("block size %d\n", s->qdev.blocksize);
+ s->type == TYPE_TAPE) {
+ s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
+ DPRINTF("block size %d\n", s->blocksize);
}
scsi_command_complete(r, ret);
/* Write data to a scsi device. Returns nonzero on failure.
The transfer may complete asynchronously. */
-static int scsi_write_data(SCSIRequest *req)
+static void scsi_write_data(SCSIRequest *req)
{
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev);
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
+ SCSIDevice *s = r->req.dev;
int ret;
DPRINTF("scsi_write_data 0x%x\n", req->tag);
if (r->len == 0) {
r->len = r->buflen;
scsi_req_data(&r->req, r->len);
- return 0;
+ return;
}
- ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete);
- if (ret == -1) {
- scsi_command_complete(r, -EINVAL);
- return 1;
+ /* 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);
}
-
- return 0;
}
/* Return a pointer to the data buffer. */
return r->buf;
}
-static void scsi_req_fixup(SCSIRequest *req)
-{
- switch(req->cmd.buf[0]) {
- case WRITE_10:
- req->cmd.buf[1] &= ~0x08; /* disable FUA */
- break;
- case READ_10:
- req->cmd.buf[1] &= ~0x08; /* disable FUA */
- break;
- case REWIND:
- case START_STOP:
- if (req->dev->type == TYPE_TAPE) {
- /* force IMMED, otherwise qemu waits end of command */
- req->cmd.buf[1] = 0x01;
- }
- break;
- }
-}
-
/* 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),
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
{
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev);
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
- SCSIBus *bus;
+ SCSIDevice *s = r->req.dev;
int ret;
- scsi_req_enqueue(req);
- if (cmd[0] != REQUEST_SENSE &&
- (req->lun != s->lun || (cmd[1] >> 5) != s->lun)) {
- DPRINTF("Unimplemented LUN %d\n", req->lun ? req->lun : cmd[1] >> 5);
-
- s->sensebuf[0] = 0x70;
- s->sensebuf[1] = 0x00;
- s->sensebuf[2] = ILLEGAL_REQUEST;
- s->sensebuf[3] = 0x00;
- s->sensebuf[4] = 0x00;
- s->sensebuf[5] = 0x00;
- s->sensebuf[6] = 0x00;
- s->senselen = 7;
- s->driver_status = SG_ERR_DRIVER_SENSE;
- bus = scsi_bus_from_device(&s->qdev);
- bus->ops->complete(req, SCSI_REASON_DONE, CHECK_CONDITION);
- return 0;
- }
-
- if (-1 == scsi_req_parse(&r->req, cmd)) {
- BADF("Unsupported command length, command %x\n", cmd[0]);
- scsi_req_dequeue(&r->req);
- scsi_req_unref(&r->req);
- return 0;
- }
- scsi_req_fixup(&r->req);
-
DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
r->req.cmd.xfer, cmd[0]);
if (r->req.cmd.xfer == 0) {
if (r->buf != NULL)
- qemu_free(r->buf);
+ g_free(r->buf);
r->buflen = 0;
r->buf = NULL;
- ret = execute_command(s->bs, r, SG_DXFER_NONE, scsi_command_complete);
- if (ret == -1) {
- scsi_command_complete(r, -EINVAL);
+ /* 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);
+ return 0;
}
return 0;
}
if (r->buflen != r->req.cmd.xfer) {
if (r->buf != NULL)
- qemu_free(r->buf);
- r->buf = qemu_malloc(r->req.cmd.xfer);
+ g_free(r->buf);
+ r->buf = g_malloc(r->req.cmd.xfer);
r->buflen = r->req.cmd.xfer;
}
}
}
-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;
-
- 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)
- 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];
io_header.timeout = 6000; /* XXX */
ret = bdrv_ioctl(bdrv, SG_IO, &io_header);
- if (ret < 0)
+ if (ret < 0 || io_header.driver_status || io_header.host_status) {
return -1;
-
+ }
return (buf[9] << 16) | (buf[10] << 8) | buf[11];
}
static void scsi_generic_reset(DeviceState *dev)
{
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev);
+ SCSIDevice *s = SCSI_DEVICE(dev);
- scsi_device_purge_requests(&s->qdev);
+ scsi_device_purge_requests(s, SENSE_CODE(RESET));
}
-static void scsi_destroy(SCSIDevice *d)
+static void scsi_destroy(SCSIDevice *s)
{
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
-
- scsi_device_purge_requests(&s->qdev);
- blockdev_mark_auto_del(s->qdev.conf.bs);
+ scsi_device_purge_requests(s, SENSE_CODE(NO_SENSE));
+ blockdev_mark_auto_del(s->conf.bs);
}
-static int scsi_generic_initfn(SCSIDevice *dev)
+static int scsi_generic_initfn(SCSIDevice *s)
{
- SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev);
int sg_version;
struct sg_scsi_id scsiid;
- if (!s->qdev.conf.bs) {
- error_report("scsi-generic: drive property not set");
+ if (!s->conf.bs) {
+ error_report("drive property not set");
return -1;
}
- s->bs = s->qdev.conf.bs;
/* check we are really using a /dev/sg* file */
- if (!bdrv_is_sg(s->bs)) {
- error_report("scsi-generic: not /dev/sg*");
+ if (!bdrv_is_sg(s->conf.bs)) {
+ error_report("not /dev/sg*");
return -1;
}
- if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) {
+ if (bdrv_get_on_error(s->conf.bs, 0) != BLOCK_ERR_STOP_ENOSPC) {
error_report("Device doesn't support drive option werror");
return -1;
}
- if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) {
+ if (bdrv_get_on_error(s->conf.bs, 1) != BLOCK_ERR_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->bs, SG_GET_VERSION_NUM, &sg_version) < 0 ||
+ 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");
+ error_report("scsi generic interface too old");
return -1;
}
/* get LUN of the /dev/sg? */
- if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) {
- error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed");
+ if (bdrv_ioctl(s->conf.bs, SG_GET_SCSI_ID, &scsiid)) {
+ error_report("SG_GET_SCSI_ID ioctl failed");
return -1;
}
/* define device state */
- s->lun = scsiid.lun;
- DPRINTF("LUN %d\n", s->lun);
- s->qdev.type = scsiid.scsi_type;
- DPRINTF("device type %d\n", s->qdev.type);
- if (s->qdev.type == TYPE_TAPE) {
- s->qdev.blocksize = get_stream_blocksize(s->bs);
- if (s->qdev.blocksize == -1)
- s->qdev.blocksize = 0;
- } else {
- s->qdev.blocksize = get_blocksize(s->bs);
- /* removable media returns 0 if not present */
- if (s->qdev.blocksize <= 0) {
- if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM)
- s->qdev.blocksize = 2048;
- else
- s->qdev.blocksize = 512;
+ s->type = scsiid.scsi_type;
+ DPRINTF("device type %d\n", s->type);
+ 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;
}
+ 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->qdev.blocksize);
- s->driver_status = 0;
- memset(s->sensebuf, 0, sizeof(s->sensebuf));
- bdrv_set_removable(s->bs, 0);
+
+ DPRINTF("block size %d\n", s->blocksize);
return 0;
}
-static SCSIDeviceInfo scsi_generic_info = {
- .qdev.name = "scsi-generic",
- .qdev.desc = "pass through generic scsi device (/dev/sg*)",
- .qdev.size = sizeof(SCSIGenericState),
- .qdev.reset = scsi_generic_reset,
- .init = scsi_generic_initfn,
- .destroy = scsi_destroy,
- .alloc_req = scsi_new_request,
+const SCSIReqOps scsi_generic_req_ops = {
+ .size = sizeof(SCSIGenericReq),
.free_req = scsi_free_request,
.send_command = scsi_send_command,
.read_data = scsi_read_data,
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
- .qdev.props = (Property[]) {
- DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf),
- DEFINE_PROP_END_OF_LIST(),
- },
};
-static void scsi_generic_register_devices(void)
+static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
+ uint8_t *buf, void *hba_private)
{
- scsi_qdev_register(&scsi_generic_info);
+ SCSIRequest *req;
+
+ req = scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private);
+ return req;
+}
+
+static Property scsi_generic_properties[] = {
+ DEFINE_BLOCK_PROPERTIES(SCSIDevice, conf),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void scsi_generic_class_initfn(ObjectClass *klass, void *data)
+{
+ 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;
}
-device_init(scsi_generic_register_devices)
+
+static 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