diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_spc.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 6c10fce9ef09..33022a3f31fc 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -975,6 +975,57 @@ out: return 0; } +static int spc_emulate_modeselect(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + char *cdb = cmd->t_task_cdb; + bool ten = cdb[0] == MODE_SELECT_10; + int off = ten ? 8 : 4; + bool pf = !!(cdb[1] & 0x10); + u8 page, subpage; + unsigned char *buf; + unsigned char tbuf[SE_MODE_PAGE_BUF]; + int length; + int ret = 0; + int i; + + buf = transport_kmap_data_sg(cmd); + + if (!pf) { + cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; + ret = -EINVAL; + goto out; + } + + page = buf[off] & 0x3f; + subpage = buf[off] & 0x40 ? buf[off + 1] : 0; + + for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) + if (modesense_handlers[i].page == page && + modesense_handlers[i].subpage == subpage) { + memset(tbuf, 0, SE_MODE_PAGE_BUF); + length = modesense_handlers[i].emulate(dev, 0, tbuf); + goto check_contents; + } + + cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; + ret = -EINVAL; + goto out; + +check_contents: + if (memcmp(buf + off, tbuf, length)) { + cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; + ret = -EINVAL; + } + +out: + transport_kunmap_data_sg(cmd); + + if (!ret) + target_complete_cmd(cmd, GOOD); + return ret; +} + static int spc_emulate_request_sense(struct se_cmd *cmd) { unsigned char *cdb = cmd->t_task_cdb; @@ -1113,9 +1164,11 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) switch (cdb[0]) { case MODE_SELECT: *size = cdb[4]; + cmd->execute_cmd = spc_emulate_modeselect; break; case MODE_SELECT_10: *size = (cdb[7] << 8) + cdb[8]; + cmd->execute_cmd = spc_emulate_modeselect; break; case MODE_SENSE: *size = cdb[4]; |