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authorNicholas Bellinger <nab@linux-iscsi.org>2017-07-08 00:45:49 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2017-07-11 20:56:39 +0300
commit138d351eefb727ab9e41a3dc5f112ceb4f6e59f2 (patch)
tree452b2ccc6e8010d526bcdf71dc03f0553bac9c37 /drivers/target/iscsi
parent55dd8cf2163e1866d9497c4f361d6ed42b3a192b (diff)
downloadlinux-138d351eefb727ab9e41a3dc5f112ceb4f6e59f2.tar.xz
iscsi-target: Add login_keys_workaround attribute for non RFC initiators
This patch re-introduces part of a long standing login workaround that was recently dropped by: commit 1c99de981f30b3e7868b8d20ce5479fa1c0fea46 Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Sun Apr 2 13:36:44 2017 -0700 iscsi-target: Drop work-around for legacy GlobalSAN initiator Namely, the workaround for FirstBurstLength ended up being required by Mellanox Flexboot PXE boot ROMs as reported by Robert. So this patch re-adds the work-around for FirstBurstLength within iscsi_check_proposer_for_optional_reply(), and makes the key optional to respond when the initiator does not propose, nor respond to it. Also as requested by Arun, this patch introduces a new TPG attribute named 'login_keys_workaround' that controls the use of both the FirstBurstLength workaround, as well as the two other existing workarounds for gPXE iSCSI boot client. By default, the workaround is enabled with login_keys_workaround=1, since Mellanox FlexBoot requires it, and Arun has verified the Qlogic MSFT initiator already proposes FirstBurstLength, so it's uneffected by this re-adding this part of the original work-around. Reported-by: Robert LeBlanc <robert@leblancnet.us> Cc: Robert LeBlanc <robert@leblancnet.us> Reviewed-by: Arun Easi <arun.easi@cavium.com> Cc: <stable@vger.kernel.org> # 3.1+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi')
-rw-r--r--drivers/target/iscsi/iscsi_target_configfs.c2
-rw-r--r--drivers/target/iscsi/iscsi_target_nego.c6
-rw-r--r--drivers/target/iscsi/iscsi_target_parameters.c41
-rw-r--r--drivers/target/iscsi/iscsi_target_parameters.h2
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.c19
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.h1
6 files changed, 55 insertions, 16 deletions
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 535a8e06a401..0dd4c45f7575 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -781,6 +781,7 @@ DEF_TPG_ATTRIB(default_erl);
DEF_TPG_ATTRIB(t10_pi);
DEF_TPG_ATTRIB(fabric_prot_type);
DEF_TPG_ATTRIB(tpg_enabled_sendtargets);
+DEF_TPG_ATTRIB(login_keys_workaround);
static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
&iscsi_tpg_attrib_attr_authentication,
@@ -796,6 +797,7 @@ static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
&iscsi_tpg_attrib_attr_t10_pi,
&iscsi_tpg_attrib_attr_fabric_prot_type,
&iscsi_tpg_attrib_attr_tpg_enabled_sendtargets,
+ &iscsi_tpg_attrib_attr_login_keys_workaround,
NULL,
};
diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index 96df63f1f795..7a6751fecd32 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -864,7 +864,8 @@ static int iscsi_target_handle_csg_zero(
SENDER_TARGET,
login->rsp_buf,
&login->rsp_length,
- conn->param_list);
+ conn->param_list,
+ conn->tpg->tpg_attrib.login_keys_workaround);
if (ret < 0)
return -1;
@@ -934,7 +935,8 @@ static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_log
SENDER_TARGET,
login->rsp_buf,
&login->rsp_length,
- conn->param_list);
+ conn->param_list,
+ conn->tpg->tpg_attrib.login_keys_workaround);
if (ret < 0) {
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
ISCSI_LOGIN_STATUS_INIT_ERR);
diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c
index fce627628200..caab1045742d 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.c
+++ b/drivers/target/iscsi/iscsi_target_parameters.c
@@ -765,7 +765,8 @@ static int iscsi_check_for_auth_key(char *key)
return 0;
}
-static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
+static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param,
+ bool keys_workaround)
{
if (IS_TYPE_BOOL_AND(param)) {
if (!strcmp(param->value, NO))
@@ -773,19 +774,31 @@ static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
} else if (IS_TYPE_BOOL_OR(param)) {
if (!strcmp(param->value, YES))
SET_PSTATE_REPLY_OPTIONAL(param);
- /*
- * Required for gPXE iSCSI boot client
- */
- if (!strcmp(param->name, IMMEDIATEDATA))
- SET_PSTATE_REPLY_OPTIONAL(param);
+
+ if (keys_workaround) {
+ /*
+ * Required for gPXE iSCSI boot client
+ */
+ if (!strcmp(param->name, IMMEDIATEDATA))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
} else if (IS_TYPE_NUMBER(param)) {
if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
SET_PSTATE_REPLY_OPTIONAL(param);
- /*
- * Required for gPXE iSCSI boot client
- */
- if (!strcmp(param->name, MAXCONNECTIONS))
- SET_PSTATE_REPLY_OPTIONAL(param);
+
+ if (keys_workaround) {
+ /*
+ * Required for Mellanox Flexboot PXE boot ROM
+ */
+ if (!strcmp(param->name, FIRSTBURSTLENGTH))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+
+ /*
+ * Required for gPXE iSCSI boot client
+ */
+ if (!strcmp(param->name, MAXCONNECTIONS))
+ SET_PSTATE_REPLY_OPTIONAL(param);
+ }
} else if (IS_PHASE_DECLARATIVE(param))
SET_PSTATE_REPLY_OPTIONAL(param);
}
@@ -1422,7 +1435,8 @@ int iscsi_encode_text_output(
u8 sender,
char *textbuf,
u32 *length,
- struct iscsi_param_list *param_list)
+ struct iscsi_param_list *param_list,
+ bool keys_workaround)
{
char *output_buf = NULL;
struct iscsi_extra_response *er;
@@ -1458,7 +1472,8 @@ int iscsi_encode_text_output(
*length += 1;
output_buf = textbuf + *length;
SET_PSTATE_PROPOSER(param);
- iscsi_check_proposer_for_optional_reply(param);
+ iscsi_check_proposer_for_optional_reply(param,
+ keys_workaround);
pr_debug("Sending key: %s=%s\n",
param->name, param->value);
}
diff --git a/drivers/target/iscsi/iscsi_target_parameters.h b/drivers/target/iscsi/iscsi_target_parameters.h
index 9962ccf0ccd7..c47b73f57528 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.h
+++ b/drivers/target/iscsi/iscsi_target_parameters.h
@@ -46,7 +46,7 @@ extern int iscsi_extract_key_value(char *, char **, char **);
extern int iscsi_update_param_value(struct iscsi_param *, char *);
extern int iscsi_decode_text_input(u8, u8, char *, u32, struct iscsi_conn *);
extern int iscsi_encode_text_output(u8, u8, char *, u32 *,
- struct iscsi_param_list *);
+ struct iscsi_param_list *, bool);
extern int iscsi_check_negotiated_keys(struct iscsi_param_list *);
extern void iscsi_set_connection_parameters(struct iscsi_conn_ops *,
struct iscsi_param_list *);
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index abaabbaebd88..594d07a1e995 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -227,6 +227,7 @@ static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
a->t10_pi = TA_DEFAULT_T10_PI;
a->fabric_prot_type = TA_DEFAULT_FABRIC_PROT_TYPE;
a->tpg_enabled_sendtargets = TA_DEFAULT_TPG_ENABLED_SENDTARGETS;
+ a->login_keys_workaround = TA_DEFAULT_LOGIN_KEYS_WORKAROUND;
}
int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
@@ -895,3 +896,21 @@ int iscsit_ta_tpg_enabled_sendtargets(
return 0;
}
+
+int iscsit_ta_login_keys_workaround(
+ struct iscsi_portal_group *tpg,
+ u32 flag)
+{
+ struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+ if ((flag != 0) && (flag != 1)) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+
+ a->login_keys_workaround = flag;
+ pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
+ tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
+
+ return 0;
+}
diff --git a/drivers/target/iscsi/iscsi_target_tpg.h b/drivers/target/iscsi/iscsi_target_tpg.h
index ceba29851167..59fd3cabe89d 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -48,5 +48,6 @@ extern int iscsit_ta_default_erl(struct iscsi_portal_group *, u32);
extern int iscsit_ta_t10_pi(struct iscsi_portal_group *, u32);
extern int iscsit_ta_fabric_prot_type(struct iscsi_portal_group *, u32);
extern int iscsit_ta_tpg_enabled_sendtargets(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_login_keys_workaround(struct iscsi_portal_group *, u32);
#endif /* ISCSI_TARGET_TPG_H */