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path: root/drivers/target/target_core_configfs.c
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Diffstat (limited to 'drivers/target/target_core_configfs.c')
-rw-r--r--drivers/target/target_core_configfs.c157
1 files changed, 125 insertions, 32 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index f6b1549f4142..72016d0dfca5 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -172,7 +172,10 @@ static struct target_fabric_configfs *target_core_get_fabric(
mutex_lock(&g_tf_lock);
list_for_each_entry(tf, &g_tf_list, tf_list) {
- if (!strcmp(tf->tf_ops->name, name)) {
+ const char *cmp_name = tf->tf_ops->fabric_alias;
+ if (!cmp_name)
+ cmp_name = tf->tf_ops->fabric_name;
+ if (!strcmp(cmp_name, name)) {
atomic_inc(&tf->tf_access_cnt);
mutex_unlock(&g_tf_lock);
return tf;
@@ -249,7 +252,7 @@ static struct config_group *target_core_register_fabric(
return ERR_PTR(-EINVAL);
}
pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
- " %s\n", tf->tf_ops->name);
+ " %s\n", tf->tf_ops->fabric_name);
/*
* On a successful target_core_get_fabric() look, the returned
* struct target_fabric_configfs *tf will contain a usage reference.
@@ -282,7 +285,7 @@ static void target_core_deregister_fabric(
" tf list\n", config_item_name(item));
pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
- " %s\n", tf->tf_ops->name);
+ " %s\n", tf->tf_ops->fabric_name);
atomic_dec(&tf->tf_access_cnt);
pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
@@ -342,17 +345,20 @@ EXPORT_SYMBOL(target_undepend_item);
static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
{
- if (!tfo->name) {
- pr_err("Missing tfo->name\n");
- return -EINVAL;
+ if (tfo->fabric_alias) {
+ if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
+ pr_err("Passed alias: %s exceeds "
+ "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
+ return -EINVAL;
+ }
}
- if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
- pr_err("Passed name: %s exceeds TARGET_FABRIC"
- "_NAME_SIZE\n", tfo->name);
+ if (!tfo->fabric_name) {
+ pr_err("Missing tfo->fabric_name\n");
return -EINVAL;
}
- if (!tfo->get_fabric_name) {
- pr_err("Missing tfo->get_fabric_name()\n");
+ if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
+ pr_err("Passed name: %s exceeds "
+ "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
return -EINVAL;
}
if (!tfo->tpg_get_wwn) {
@@ -486,7 +492,7 @@ void target_unregister_template(const struct target_core_fabric_ops *fo)
mutex_lock(&g_tf_lock);
list_for_each_entry(t, &g_tf_list, tf_list) {
- if (!strcmp(t->tf_ops->name, fo->name)) {
+ if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
BUG_ON(atomic_read(&t->tf_access_cnt));
list_del(&t->tf_list);
mutex_unlock(&g_tf_lock);
@@ -532,9 +538,9 @@ DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
+DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
-DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
@@ -592,6 +598,7 @@ static ssize_t _name##_store(struct config_item *item, const char *page, \
DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
+DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
@@ -613,12 +620,17 @@ static void dev_set_t10_wwn_model_alias(struct se_device *dev)
const char *configname;
configname = config_item_name(&dev->dev_group.cg_item);
- if (strlen(configname) >= 16) {
+ if (strlen(configname) >= INQUIRY_MODEL_LEN) {
pr_warn("dev[%p]: Backstore name '%s' is too long for "
- "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
+ "INQUIRY_MODEL, truncating to 15 characters\n", dev,
configname);
}
- snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
+ /*
+ * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
+ * here without potentially breaking existing setups, so continue to
+ * truncate one byte shorter than what can be carried in INQUIRY.
+ */
+ strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
}
static ssize_t emulate_model_alias_store(struct config_item *item,
@@ -640,11 +652,12 @@ static ssize_t emulate_model_alias_store(struct config_item *item,
if (ret < 0)
return ret;
+ BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
if (flag) {
dev_set_t10_wwn_model_alias(dev);
} else {
- strncpy(&dev->t10_wwn.model[0],
- dev->transport->inquiry_prod, 16);
+ strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
+ sizeof(dev->t10_wwn.model));
}
da->emulate_model_alias = flag;
return count;
@@ -1116,9 +1129,10 @@ CONFIGFS_ATTR(, emulate_tpu);
CONFIGFS_ATTR(, emulate_tpws);
CONFIGFS_ATTR(, emulate_caw);
CONFIGFS_ATTR(, emulate_3pc);
+CONFIGFS_ATTR(, emulate_pr);
CONFIGFS_ATTR(, pi_prot_type);
CONFIGFS_ATTR_RO(, hw_pi_prot_type);
-CONFIGFS_ATTR(, pi_prot_format);
+CONFIGFS_ATTR_WO(, pi_prot_format);
CONFIGFS_ATTR(, pi_prot_verify);
CONFIGFS_ATTR(, enforce_pr_isids);
CONFIGFS_ATTR(, is_nonrot);
@@ -1156,6 +1170,7 @@ struct configfs_attribute *sbc_attrib_attrs[] = {
&attr_emulate_tpws,
&attr_emulate_caw,
&attr_emulate_3pc,
+ &attr_emulate_pr,
&attr_pi_prot_type,
&attr_hw_pi_prot_type,
&attr_pi_prot_format,
@@ -1211,6 +1226,74 @@ static struct t10_wwn *to_t10_wwn(struct config_item *item)
}
/*
+ * STANDARD and VPD page 0x83 T10 Vendor Identification
+ */
+static ssize_t target_wwn_vendor_id_show(struct config_item *item,
+ char *page)
+{
+ return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
+}
+
+static ssize_t target_wwn_vendor_id_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct t10_wwn *t10_wwn = to_t10_wwn(item);
+ struct se_device *dev = t10_wwn->t10_dev;
+ /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
+ unsigned char buf[INQUIRY_VENDOR_LEN + 2];
+ char *stripped = NULL;
+ size_t len;
+ int i;
+
+ len = strlcpy(buf, page, sizeof(buf));
+ if (len < sizeof(buf)) {
+ /* Strip any newline added from userspace. */
+ stripped = strstrip(buf);
+ len = strlen(stripped);
+ }
+ if (len > INQUIRY_VENDOR_LEN) {
+ pr_err("Emulated T10 Vendor Identification exceeds"
+ " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
+ "\n");
+ return -EOVERFLOW;
+ }
+
+ /*
+ * SPC 4.3.1:
+ * ASCII data fields shall contain only ASCII printable characters (i.e.,
+ * code values 20h to 7Eh) and may be terminated with one or more ASCII
+ * null (00h) characters.
+ */
+ for (i = 0; i < len; i++) {
+ if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) {
+ pr_err("Emulated T10 Vendor Identification contains"
+ " non-ASCII-printable characters\n");
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * Check to see if any active exports exist. If they do exist, fail
+ * here as changing this information on the fly (underneath the
+ * initiator side OS dependent multipath code) could cause negative
+ * effects.
+ */
+ if (dev->export_count) {
+ pr_err("Unable to set T10 Vendor Identification while"
+ " active %d exports exist\n", dev->export_count);
+ return -EINVAL;
+ }
+
+ BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
+ strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
+
+ pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
+ " %s\n", dev->t10_wwn.vendor);
+
+ return count;
+}
+
+/*
* VPD page 0x80 Unit serial
*/
static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
@@ -1356,6 +1439,7 @@ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
/* VPD page 0x83 Association: SCSI Target Device */
DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
+CONFIGFS_ATTR(target_wwn_, vendor_id);
CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
@@ -1363,6 +1447,7 @@ CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
+ &target_wwn_attr_vendor_id,
&target_wwn_attr_vpd_unit_serial,
&target_wwn_attr_vpd_protocol_identifier,
&target_wwn_attr_vpd_assoc_logical_unit,
@@ -1400,7 +1485,7 @@ static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
- se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_nacl->se_tpg->se_tpg_tfo->fabric_name,
se_nacl->initiatorname, i_buf);
}
@@ -1414,7 +1499,7 @@ static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
if (se_nacl) {
len = sprintf(page,
"SPC-2 Reservation: %s Initiator: %s\n",
- se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_nacl->se_tpg->se_tpg_tfo->fabric_name,
se_nacl->initiatorname);
} else {
len = sprintf(page, "No SPC-2 Reservation holder\n");
@@ -1427,6 +1512,9 @@ static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
struct se_device *dev = pr_to_dev(item);
int ret;
+ if (!dev->dev_attrib.emulate_pr)
+ return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
+
if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return sprintf(page, "Passthrough\n");
@@ -1489,13 +1577,13 @@ static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
tfo = se_tpg->se_tpg_tfo;
len += sprintf(page+len, "SPC-3 Reservation: %s"
- " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
+ " Target Node Endpoint: %s\n", tfo->fabric_name,
tfo->tpg_get_wwn(se_tpg));
len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
" Identifier Tag: %hu %s Portal Group Tag: %hu"
" %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
- tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
- tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
+ tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
+ tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
out_unlock:
spin_unlock(&dev->dev_reservation_lock);
@@ -1526,7 +1614,7 @@ static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
core_pr_dump_initiator_port(pr_reg, i_buf,
PR_REG_ISID_ID_LEN);
sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
- tfo->get_fabric_name(),
+ tfo->fabric_name,
pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
pr_reg->pr_res_generation);
@@ -1567,12 +1655,14 @@ static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
{
struct se_device *dev = pr_to_dev(item);
+ if (!dev->dev_attrib.emulate_pr)
+ return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return sprintf(page, "SPC_PASSTHROUGH\n");
- else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+ if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
return sprintf(page, "SPC2_RESERVATIONS\n");
- else
- return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
+
+ return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
}
static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
@@ -1580,7 +1670,8 @@ static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
{
struct se_device *dev = pr_to_dev(item);
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
+ if (!dev->dev_attrib.emulate_pr ||
+ (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
return 0;
return sprintf(page, "APTPL Bit Status: %s\n",
@@ -1592,7 +1683,8 @@ static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
{
struct se_device *dev = pr_to_dev(item);
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
+ if (!dev->dev_attrib.emulate_pr ||
+ (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
return 0;
return sprintf(page, "Ready to process PR APTPL metadata..\n");
@@ -1638,7 +1730,8 @@ static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
u16 tpgt = 0;
u8 type = 0;
- if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
+ if (!dev->dev_attrib.emulate_pr ||
+ (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
return count;
if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
return count;
@@ -2746,7 +2839,7 @@ static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
struct se_portal_group *tpg = lun->lun_tpg;
cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
- "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ "/%s\n", tpg->se_tpg_tfo->fabric_name,
tpg->se_tpg_tfo->tpg_get_wwn(tpg),
tpg->se_tpg_tfo->tpg_get_tag(tpg),
config_item_name(&lun->lun_group.cg_item));
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.