return 0;
}
-/*
- * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
- * Note this is not used for TCM/pSCSI passthrough
- */
-static int sbc_emulate_unmap(struct se_cmd *cmd)
-{
- struct se_device *dev = cmd->se_dev;
- unsigned char *buf, *ptr = NULL;
- unsigned char *cdb = &cmd->t_task_cdb[0];
- sector_t lba;
- unsigned int size = cmd->data_length, range;
- int ret = 0, offset;
- unsigned short dl, bd_dl;
-
- if (!dev->transport->do_discard) {
- pr_err("UNMAP emulation not supported for: %s\n",
- dev->transport->name);
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
- return -ENOSYS;
- }
-
- /* First UNMAP block descriptor starts at 8 byte offset */
- offset = 8;
- size -= 8;
- dl = get_unaligned_be16(&cdb[0]);
- bd_dl = get_unaligned_be16(&cdb[2]);
-
- buf = transport_kmap_data_sg(cmd);
-
- ptr = &buf[offset];
- pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
- " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
-
- while (size) {
- lba = get_unaligned_be64(&ptr[0]);
- range = get_unaligned_be32(&ptr[8]);
- pr_debug("UNMAP: Using lba: %llu and range: %u\n",
- (unsigned long long)lba, range);
-
- ret = dev->transport->do_discard(dev, lba, range);
- if (ret < 0) {
- pr_err("blkdev_issue_discard() failed: %d\n",
- ret);
- goto err;
- }
-
- ptr += 16;
- size -= 16;
- }
-
-err:
- transport_kunmap_data_sg(cmd);
- if (!ret)
- target_complete_cmd(cmd, GOOD);
- return ret;
-}
-
-/*
- * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
- * Note this is not used for TCM/pSCSI passthrough
- */
-static int sbc_emulate_write_same(struct se_cmd *cmd)
+int spc_get_write_same_sectors(struct se_cmd *cmd)
{
- struct se_device *dev = cmd->se_dev;
- sector_t range;
- sector_t lba = cmd->t_task_lba;
u32 num_blocks;
- int ret;
-
- if (!dev->transport->do_discard) {
- pr_err("WRITE_SAME emulation not supported"
- " for: %s\n", dev->transport->name);
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
- return -ENOSYS;
- }
if (cmd->t_task_cdb[0] == WRITE_SAME)
num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
* Use the explicit range when non zero is supplied, otherwise calculate
* the remaining range based on ->get_blocks() - starting LBA.
*/
- if (num_blocks != 0)
- range = num_blocks;
- else
- range = (dev->transport->get_blocks(dev) - lba) + 1;
-
- pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
- (unsigned long long)lba, (unsigned long long)range);
-
- ret = dev->transport->do_discard(dev, lba, range);
- if (ret < 0) {
- pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
- return ret;
- }
-
- target_complete_cmd(cmd, GOOD);
- return 0;
-}
-
-static int sbc_emulate_synchronize_cache(struct se_cmd *cmd)
-{
- if (!cmd->se_dev->transport->do_sync_cache) {
- pr_err("SYNCHRONIZE_CACHE emulation not supported"
- " for: %s\n", cmd->se_dev->transport->name);
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
- return -ENOSYS;
- }
+ if (num_blocks)
+ return num_blocks;
- cmd->se_dev->transport->do_sync_cache(cmd);
- return 0;
+ return cmd->se_dev->transport->get_blocks(cmd->se_dev) -
+ cmd->t_task_lba + 1;
}
+EXPORT_SYMBOL(spc_get_write_same_sectors);
static int sbc_emulate_verify(struct se_cmd *cmd)
{
cmd->se_cmd_flags |= SCF_FUA;
break;
case WRITE_SAME_32:
+ if (!ops->execute_write_same)
+ goto out_unsupported_cdb;
+
sectors = transport_get_sectors_32(cdb);
if (!sectors) {
pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not"
if (sbc_write_same_supported(dev, &cdb[10]) < 0)
goto out_unsupported_cdb;
- cmd->execute_cmd = sbc_emulate_write_same;
+ cmd->execute_cmd = ops->execute_write_same;
break;
default:
pr_err("VARIABLE_LENGTH_CMD service action"
break;
case SYNCHRONIZE_CACHE:
case SYNCHRONIZE_CACHE_16:
+ if (!ops->execute_sync_cache)
+ goto out_unsupported_cdb;
+
/*
* Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
*/
if (sbc_check_valid_sectors(cmd) < 0)
goto out_invalid_cdb_field;
}
- cmd->execute_cmd = sbc_emulate_synchronize_cache;
+ cmd->execute_cmd = ops->execute_sync_cache;
break;
case UNMAP:
+ if (!ops->execute_unmap)
+ goto out_unsupported_cdb;
+
size = get_unaligned_be16(&cdb[7]);
- cmd->execute_cmd = sbc_emulate_unmap;
+ cmd->execute_cmd = ops->execute_unmap;
break;
case WRITE_SAME_16:
+ if (!ops->execute_write_same)
+ goto out_unsupported_cdb;
+
sectors = transport_get_sectors_16(cdb);
if (!sectors) {
pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
if (sbc_write_same_supported(dev, &cdb[1]) < 0)
goto out_unsupported_cdb;
- cmd->execute_cmd = sbc_emulate_write_same;
+ cmd->execute_cmd = ops->execute_write_same;
break;
case WRITE_SAME:
+ if (!ops->execute_write_same)
+ goto out_unsupported_cdb;
+
sectors = transport_get_sectors_10(cdb);
if (!sectors) {
pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
*/
if (sbc_write_same_supported(dev, &cdb[1]) < 0)
goto out_unsupported_cdb;
- cmd->execute_cmd = sbc_emulate_write_same;
+ cmd->execute_cmd = ops->execute_write_same;
break;
case VERIFY:
size = 0;
projects / karo-tx-linux.git / blobdiff