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authorDmitry Bogdanov <d.bogdanov@yadro.com>2022-09-06 13:34:19 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2022-10-27 04:44:32 +0300
commitbd217b8c3a1f705f2d92d30974412fbd5f43271a (patch)
tree5d1be5bf5734e94d6bd3cb93010ee74f7788271d /drivers/target
parent553b08d9b3a78aa602f818c0c94705774f018df0 (diff)
downloadlinux-bd217b8c3a1f705f2d92d30974412fbd5f43271a.tar.xz
scsi: target: core: Add emulate_rsoc attribute
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>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_configfs.c20
-rw-r--r--drivers/target/target_core_device.c1
-rw-r--r--drivers/target/target_core_spc.c12
3 files changed, 33 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 416514c5c7ac..533524299ed6 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -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);
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index b7f16ee8aa0e..e7d202b57405 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -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;
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index e1cf9c352fd3..91f03312a5ea 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -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;