- cdb[0] = 0xa1; /* OPERATION CODE: 12 byte pass through */
- if (direction == SG_DXFER_NONE) {
- cdb[1] = 3 << 1; /* PROTOCOL: Non-Data */
- cdb[2] = 0x20; /* OFF_LINE=0, CK_COND=1, T_DIR=0, BYT_BLOK=0, T_LENGTH=0 */
- } else if (direction == SG_DXFER_FROM_DEV) {
- cdb[1] = 4 << 1; /* PROTOCOL: PIO Data-in */
- cdb[2] = 0x2e; /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
- } else if (direction == SG_DXFER_TO_DEV) {
- cdb[1] = 5 << 1; /* PROTOCOL: PIO Data-Out */
- cdb[2] = 0x26; /* OFF_LINE=0, CK_COND=1, T_DIR=0, BYT_BLOK=1, T_LENGTH=2 */
+ cdb[0] = 0xa1; /* OPERATION CODE: 12 byte pass through */
+ cdb[1] = 4 << 1; /* PROTOCOL: PIO Data-in */
+ cdb[2] = 0x2e; /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */
+ cdb[3] = 0; /* FEATURES */
+ cdb[4] = 1; /* SECTORS */
+ cdb[5] = 0; /* LBA LOW */
+ cdb[6] = 0; /* LBA MID */
+ cdb[7] = 0; /* LBA HIGH */
+ cdb[8] = 0 & 0x4F; /* SELECT */
+ cdb[9] = 0xEC; /* Command: ATA IDENTIFY DEVICE */;
+ memset(sense, 0, sizeof(sense));
+
+ memset(&io_v4, 0, sizeof(struct sg_io_v4));
+ io_v4.guard = 'Q';
+ io_v4.protocol = BSG_PROTOCOL_SCSI;
+ io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
+ io_v4.request_len = sizeof (cdb);
+ io_v4.request = (uintptr_t) cdb;
+ io_v4.max_response_len = sizeof (sense);
+ io_v4.response = (uintptr_t) sense;
+ io_v4.din_xfer_len = buf_len;
+ io_v4.din_xferp = (uintptr_t) buf;
+ io_v4.timeout = COMMAND_TIMEOUT_MSEC;
+
+ ret = ioctl(fd, SG_IO, &io_v4);
+ if (ret != 0) {
+ /* could be that the driver doesn't do version 4, try version 3 */
+ if (errno == EINVAL) {
+ struct sg_io_hdr io_hdr;
+
+ memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
+ io_hdr.interface_id = 'S';
+ io_hdr.cmdp = (unsigned char*) cdb;
+ io_hdr.cmd_len = sizeof (cdb);
+ io_hdr.dxferp = buf;
+ io_hdr.dxfer_len = buf_len;
+ io_hdr.sbp = sense;
+ io_hdr.mx_sb_len = sizeof (sense);
+ io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+ io_hdr.timeout = COMMAND_TIMEOUT_MSEC;
+
+ ret = ioctl(fd, SG_IO, &io_hdr);
+ if (ret != 0)
+ goto out;
+ } else {
+ goto out;
+ }
+ }
+
+ if (!(sense[0] == 0x72 && desc[0] == 0x9 && desc[1] == 0x0c)) {
+ errno = EIO;
+ ret = -1;
+ goto out;