*
*/
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "qemu-common.h"
#include "qemu/error-report.h"
#include "hw/scsi/scsi.h"
#define BADF(fmt, ...) \
do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
#include <scsi/sg.h>
#include "block/scsi.h"
}
/* Helper function for command completion. */
-static void scsi_command_complete(void *opaque, int ret)
+static void scsi_command_complete_noio(SCSIGenericReq *r, int ret)
{
int status;
- SCSIGenericReq *r = (SCSIGenericReq *)opaque;
- r->req.aiocb = NULL;
+ assert(r->req.aiocb == NULL);
+
if (r->req.io_canceled) {
scsi_req_cancel_complete(&r->req);
goto done;
scsi_req_unref(&r->req);
}
+static void scsi_command_complete(void *opaque, int ret)
+{
+ SCSIGenericReq *r = (SCSIGenericReq *)opaque;
+
+ assert(r->req.aiocb != NULL);
+ r->req.aiocb = NULL;
+ scsi_command_complete_noio(r, ret);
+}
+
static int execute_command(BlockBackend *blk,
SCSIGenericReq *r, int direction,
BlockCompletionFunc *complete)
SCSIDevice *s = r->req.dev;
int len;
+ assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
+
if (ret || r->req.io_canceled) {
- scsi_command_complete(r, ret);
+ scsi_command_complete_noio(r, ret);
return;
}
+
len = r->io_header.dxfer_len - r->io_header.resid;
DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
r->len = -1;
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 &&
- (ldl_be_p(&r->buf[0]) != 0xffffffffU || s->max_lba == 0)) {
- s->blocksize = ldl_be_p(&r->buf[4]);
- s->max_lba = ldl_be_p(&r->buf[0]) & 0xffffffffULL;
- } 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]);
- }
- blk_set_guest_block_size(s->conf.blk, s->blocksize);
+ scsi_command_complete_noio(r, 0);
+ return;
+ }
- scsi_req_data(&r->req, len);
- scsi_req_unref(&r->req);
+ /* Snoop READ CAPACITY output to set the blocksize. */
+ if (r->req.cmd.buf[0] == READ_CAPACITY_10 &&
+ (ldl_be_p(&r->buf[0]) != 0xffffffffU || s->max_lba == 0)) {
+ s->blocksize = ldl_be_p(&r->buf[4]);
+ s->max_lba = ldl_be_p(&r->buf[0]) & 0xffffffffULL;
+ } 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]);
+ }
+ blk_set_guest_block_size(s->conf.blk, s->blocksize);
+
+ /* Patch MODE SENSE device specific parameters if the BDS is opened
+ * readonly.
+ */
+ if ((s->type == TYPE_DISK || s->type == TYPE_TAPE) &&
+ blk_is_read_only(s->conf.blk) &&
+ (r->req.cmd.buf[0] == MODE_SENSE ||
+ r->req.cmd.buf[0] == MODE_SENSE_10) &&
+ (r->req.cmd.buf[1] & 0x8) == 0) {
+ if (r->req.cmd.buf[0] == MODE_SENSE) {
+ r->buf[2] |= 0x80;
+ } else {
+ r->buf[3] |= 0x80;
+ }
}
+ scsi_req_data(&r->req, len);
+ scsi_req_unref(&r->req);
}
/* Read more data from scsi device into buffer. */
/* 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);
+ scsi_command_complete_noio(r, 0);
return;
}
ret = execute_command(s->conf.blk, r, SG_DXFER_FROM_DEV,
scsi_read_complete);
if (ret < 0) {
- scsi_command_complete(r, ret);
+ scsi_command_complete_noio(r, ret);
}
}
SCSIDevice *s = r->req.dev;
DPRINTF("scsi_write_complete() ret = %d\n", ret);
+
+ assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
+
if (ret || r->req.io_canceled) {
- scsi_command_complete(r, ret);
+ scsi_command_complete_noio(r, ret);
return;
}
DPRINTF("block size %d\n", s->blocksize);
}
- scsi_command_complete(r, ret);
+ scsi_command_complete_noio(r, ret);
}
/* Write data to a scsi device. Returns nonzero on failure.
scsi_req_ref(&r->req);
ret = execute_command(s->conf.blk, r, SG_DXFER_TO_DEV, scsi_write_complete);
if (ret < 0) {
- scsi_command_complete(r, ret);
+ scsi_command_complete_noio(r, ret);
}
}
ret = execute_command(s->conf.blk, r, SG_DXFER_NONE,
scsi_command_complete);
if (ret < 0) {
- scsi_command_complete(r, ret);
+ scsi_command_complete_noio(r, ret);
return 0;
}
return 0;
}
}
+static int read_naa_id(const uint8_t *p, uint64_t *p_wwn)
+{
+ int i;
+
+ if ((p[1] & 0xF) == 3) {
+ /* NAA designator type */
+ if (p[3] != 8) {
+ return -EINVAL;
+ }
+ *p_wwn = ldq_be_p(p + 4);
+ return 0;
+ }
+
+ if ((p[1] & 0xF) == 8) {
+ /* SCSI name string designator type */
+ if (p[3] < 20 || memcmp(&p[4], "naa.", 4)) {
+ return -EINVAL;
+ }
+ if (p[3] > 20 && p[24] != ',') {
+ return -EINVAL;
+ }
+ *p_wwn = 0;
+ for (i = 8; i < 24; i++) {
+ char c = toupper(p[i]);
+ c -= (c >= '0' && c <= '9' ? '0' : 'A' - 10);
+ *p_wwn = (*p_wwn << 4) | c;
+ }
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+void scsi_generic_read_device_identification(SCSIDevice *s)
+{
+ uint8_t cmd[6];
+ uint8_t buf[250];
+ uint8_t sensebuf[8];
+ sg_io_hdr_t io_header;
+ int ret;
+ int i, len;
+
+ memset(cmd, 0, sizeof(cmd));
+ memset(buf, 0, sizeof(buf));
+ cmd[0] = INQUIRY;
+ cmd[1] = 1;
+ cmd[2] = 0x83;
+ cmd[4] = sizeof(buf);
+
+ 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 = blk_ioctl(s->conf.blk, SG_IO, &io_header);
+ if (ret < 0 || io_header.driver_status || io_header.host_status) {
+ return;
+ }
+
+ len = MIN((buf[2] << 8) | buf[3], sizeof(buf) - 4);
+ for (i = 0; i + 3 <= len; ) {
+ const uint8_t *p = &buf[i + 4];
+ uint64_t wwn;
+
+ if (i + (p[3] + 4) > len) {
+ break;
+ }
+
+ if ((p[1] & 0x10) == 0) {
+ /* Associated with the logical unit */
+ if (read_naa_id(p, &wwn) == 0) {
+ s->wwn = wwn;
+ }
+ } else if ((p[1] & 0x10) == 0x10) {
+ /* Associated with the target port */
+ if (read_naa_id(p, &wwn) == 0) {
+ s->port_wwn = wwn;
+ }
+ }
+
+ i += p[3] + 4;
+ }
+}
+
static int get_stream_blocksize(BlockBackend *blk)
{
uint8_t cmd[6];
}
DPRINTF("block size %d\n", s->blocksize);
+
+ scsi_generic_read_device_identification(s);
}
const SCSIReqOps scsi_generic_req_ops = {
Code Review / kvmfornfv.git / blobdiff