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scsi: target: core: Add emulate_rsoc attribute

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Allow support for RSOC to be turned off via the emulate_rsoc attibute.
This is just for testing purposes.

Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Link: https://lore.kernel.org/r/20220906103421.22348-5-d.bogdanov@yadro.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dmitry Bogdanov 2022-09-06 13:34:19 +03:00 committed by Martin K. Petersen
parent 553b08d9b3
commit bd217b8c3a
4 changed files with 36 additions and 0 deletions
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20
drivers/target/target_core_configfs.c
View File

@ -547,6 +547,7 @@ DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc);
#define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
static ssize_t _name##_store(struct config_item *item, const char *page,\
@ -1186,6 +1187,23 @@ static ssize_t pgr_support_store(struct config_item *item,
return count;
}
static ssize_t emulate_rsoc_store(struct config_item *item,
const char *page, size_t count)
{
struct se_dev_attrib *da = to_attrib(item);
bool flag;
int ret;
ret = strtobool(page, &flag);
if (ret < 0)
return ret;
da->emulate_rsoc = flag;
pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n",
da->da_dev, flag);
return count;
}
CONFIGFS_ATTR(, emulate_model_alias);
CONFIGFS_ATTR(, emulate_dpo);
CONFIGFS_ATTR(, emulate_fua_write);
@ -1198,6 +1216,7 @@ CONFIGFS_ATTR(, emulate_tpws);
CONFIGFS_ATTR(, emulate_caw);
CONFIGFS_ATTR(, emulate_3pc);
CONFIGFS_ATTR(, emulate_pr);
CONFIGFS_ATTR(, emulate_rsoc);
CONFIGFS_ATTR(, pi_prot_type);
CONFIGFS_ATTR_RO(, hw_pi_prot_type);
CONFIGFS_ATTR(, pi_prot_format);
@ -1261,6 +1280,7 @@ struct configfs_attribute *sbc_attrib_attrs[] = {
&attr_max_write_same_len,
&attr_alua_support,
&attr_pgr_support,
&attr_emulate_rsoc,
NULL,
};
EXPORT_SYMBOL(sbc_attrib_attrs);

1
drivers/target/target_core_device.c
View File

@ -785,6 +785,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
dev->dev_attrib.emulate_pr = DA_EMULATE_PR;
dev->dev_attrib.emulate_rsoc = DA_EMULATE_RSOC;
dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;

12
drivers/target/target_core_spc.c
View File

@ -1889,6 +1889,14 @@ static struct target_opcode_descriptor tcm_opcode_report_target_pgs = {
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
};
static bool spc_rsoc_enabled(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
return dev->dev_attrib.emulate_rsoc;
}
static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
@ -1899,6 +1907,7 @@ static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = {
0x87, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
.enabled = spc_rsoc_enabled,
};
static bool tcm_is_set_tpg_enabled(struct se_cmd *cmd)
@ -2135,6 +2144,9 @@ spc_emulate_report_supp_op_codes(struct se_cmd *cmd)
sense_reason_t ret = 0;
int i;
if (!cmd->se_dev->dev_attrib.emulate_rsoc)
return TCM_UNSUPPORTED_SCSI_OPCODE;
rbuf = transport_kmap_data_sg(cmd);
if (cmd->data_length && !rbuf) {
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;

3
include/target/target_core_base.h
View File

@ -91,6 +91,8 @@
#define DA_EMULATE_ALUA 0
/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
#define DA_EMULATE_PR 1
/* Emulation for REPORT SUPPORTED OPERATION CODES */
#define DA_EMULATE_RSOC 1
/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
#define DA_ENFORCE_PR_ISIDS 1
/* Force SPC-3 PR Activate Persistence across Target Power Loss */
@ -690,6 +692,7 @@ struct se_dev_attrib {
bool emulate_caw;
bool emulate_3pc;
bool emulate_pr;
bool emulate_rsoc;
enum target_prot_type pi_prot_type;
enum target_prot_type hw_pi_prot_type;
bool pi_prot_verify;