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linux/drivers/target/iscsi/iscsi_target_configfs.c
Mike Christie 194605d45d scsi: target: Have drivers report if they support direct submissions 
In some cases, like with multiple LUN targets or where the target has to
respond to transport level requests from the receiving context it can be
better to defer cmd submission to a helper thread. If the backend driver
blocks on something like request/tag allocation it can block the entire
target submission path and other LUs and transport IO on that session.

In other cases like single LUN targets with storage that can support all
the commands that the target can queue, then it's best to submit the cmd
to the backend from the target's cmd receiving context.

Subsequent commits will allow the user to config what they prefer, but
drivers like loop can't directly submit because they can be called from a
context that can't sleep. And, drivers like vhost-scsi can support direct
submission, but need to keep their default behavior of deferring execution
to avoid possible regressions where the backend can block.

Make the drivers tell LIO core if they support direct submissions and their
current default, so we can prevent users from misconfiguring the system and
initialize devices correctly.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230928020907.5730-2-michael.christie@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-10-13 15:53:57 -04:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
* This file contains the configfs implementation for iSCSI Target mode
* from the LIO-Target Project.
*
* (c) Copyright 2007-2013 Datera, Inc.
*
* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
*
****************************************************************************/
#include <linux/configfs.h>
#include <linux/ctype.h>
#include <linux/export.h>
#include <linux/inet.h>
#include <linux/module.h>
#include <net/ipv6.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include <target/iscsi/iscsi_transport.h>
#include <target/iscsi/iscsi_target_core.h>
#include "iscsi_target_parameters.h"
#include "iscsi_target_device.h"
#include "iscsi_target_erl0.h"
#include "iscsi_target_nodeattrib.h"
#include "iscsi_target_tpg.h"
#include "iscsi_target_util.h"
#include "iscsi_target.h"
#include <target/iscsi/iscsi_target_stat.h>
/* Start items for lio_target_portal_cit */
static inline struct iscsi_tpg_np *to_iscsi_tpg_np(struct config_item *item)
{
return container_of(to_tpg_np(item), struct iscsi_tpg_np, se_tpg_np);
}
static ssize_t lio_target_np_driver_show(struct config_item *item, char *page,
enum iscsit_transport_type type)
{
struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
struct iscsi_tpg_np *tpg_np_new;
ssize_t rb;
tpg_np_new = iscsit_tpg_locate_child_np(tpg_np, type);
if (tpg_np_new)
rb = sysfs_emit(page, "1\n");
else
rb = sysfs_emit(page, "0\n");
return rb;
}
static ssize_t lio_target_np_driver_store(struct config_item *item,
const char *page, size_t count, enum iscsit_transport_type type,
const char *mod_name)
{
struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
struct iscsi_np *np;
struct iscsi_portal_group *tpg;
struct iscsi_tpg_np *tpg_np_new = NULL;
u32 op;
int rc;
rc = kstrtou32(page, 0, &op);
if (rc)
return rc;
if ((op != 1) && (op != 0)) {
pr_err("Illegal value for tpg_enable: %u\n", op);
return -EINVAL;
}
np = tpg_np->tpg_np;
if (!np) {
pr_err("Unable to locate struct iscsi_np from"
" struct iscsi_tpg_np\n");
return -EINVAL;
}
tpg = tpg_np->tpg;
if (iscsit_get_tpg(tpg) < 0)
return -EINVAL;
if (op) {
if (strlen(mod_name)) {
rc = request_module(mod_name);
if (rc != 0) {
pr_warn("Unable to request_module for %s\n",
mod_name);
rc = 0;
}
}
tpg_np_new = iscsit_tpg_add_network_portal(tpg,
&np->np_sockaddr, tpg_np, type);
if (IS_ERR(tpg_np_new)) {
rc = PTR_ERR(tpg_np_new);
goto out;
}
} else {
tpg_np_new = iscsit_tpg_locate_child_np(tpg_np, type);
if (tpg_np_new) {
rc = iscsit_tpg_del_network_portal(tpg, tpg_np_new);
if (rc < 0)
goto out;
}
}
iscsit_put_tpg(tpg);
return count;
out:
iscsit_put_tpg(tpg);
return rc;
}
static ssize_t lio_target_np_iser_show(struct config_item *item, char *page)
{
return lio_target_np_driver_show(item, page, ISCSI_INFINIBAND);
}
static ssize_t lio_target_np_iser_store(struct config_item *item,
const char *page, size_t count)
{
return lio_target_np_driver_store(item, page, count,
ISCSI_INFINIBAND, "ib_isert");
}
CONFIGFS_ATTR(lio_target_np_, iser);
static ssize_t lio_target_np_cxgbit_show(struct config_item *item, char *page)
{
return lio_target_np_driver_show(item, page, ISCSI_CXGBIT);
}
static ssize_t lio_target_np_cxgbit_store(struct config_item *item,
const char *page, size_t count)
{
return lio_target_np_driver_store(item, page, count,
ISCSI_CXGBIT, "cxgbit");
}
CONFIGFS_ATTR(lio_target_np_, cxgbit);
static struct configfs_attribute *lio_target_portal_attrs[] = {
&lio_target_np_attr_iser,
&lio_target_np_attr_cxgbit,
NULL,
};
/* Stop items for lio_target_portal_cit */
/* Start items for lio_target_np_cit */
#define MAX_PORTAL_LEN 256
static struct se_tpg_np *lio_target_call_addnptotpg(
struct se_portal_group *se_tpg,
struct config_group *group,
const char *name)
{
struct iscsi_portal_group *tpg;
struct iscsi_tpg_np *tpg_np;
char *str, *str2, *ip_str, *port_str;
struct sockaddr_storage sockaddr = { };
int ret;
char buf[MAX_PORTAL_LEN + 1] = { };
if (strlen(name) > MAX_PORTAL_LEN) {
pr_err("strlen(name): %d exceeds MAX_PORTAL_LEN: %d\n",
(int)strlen(name), MAX_PORTAL_LEN);
return ERR_PTR(-EOVERFLOW);
}
snprintf(buf, MAX_PORTAL_LEN + 1, "%s", name);
str = strstr(buf, "[");
if (str) {
str2 = strstr(str, "]");
if (!str2) {
pr_err("Unable to locate trailing \"]\""
" in IPv6 iSCSI network portal address\n");
return ERR_PTR(-EINVAL);
}
ip_str = str + 1; /* Skip over leading "[" */
*str2 = '\0'; /* Terminate the unbracketed IPv6 address */
str2++; /* Skip over the \0 */
port_str = strstr(str2, ":");
if (!port_str) {
pr_err("Unable to locate \":port\""
" in IPv6 iSCSI network portal address\n");
return ERR_PTR(-EINVAL);
}
*port_str = '\0'; /* Terminate string for IP */
port_str++; /* Skip over ":" */
} else {
ip_str = &buf[0];
port_str = strstr(ip_str, ":");
if (!port_str) {
pr_err("Unable to locate \":port\""
" in IPv4 iSCSI network portal address\n");
return ERR_PTR(-EINVAL);
}
*port_str = '\0'; /* Terminate string for IP */
port_str++; /* Skip over ":" */
}
ret = inet_pton_with_scope(&init_net, AF_UNSPEC, ip_str,
port_str, &sockaddr);
if (ret) {
pr_err("malformed ip/port passed: %s\n", name);
return ERR_PTR(ret);
}
tpg = to_iscsi_tpg(se_tpg);
ret = iscsit_get_tpg(tpg);
if (ret < 0)
return ERR_PTR(-EINVAL);
pr_debug("LIO_Target_ConfigFS: REGISTER -> %s TPGT: %hu"
" PORTAL: %s\n",
config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
tpg->tpgt, name);
/*
* Assume ISCSI_TCP by default. Other network portals for other
* iSCSI fabrics:
*
* Traditional iSCSI over SCTP (initial support)
* iSER/TCP (TODO, hardware available)
* iSER/SCTP (TODO, software emulation with osc-iwarp)
* iSER/IB (TODO, hardware available)
*
* can be enabled with attributes under
* sys/kernel/config/iscsi/$IQN/$TPG/np/$IP:$PORT/
*
*/
tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, NULL,
ISCSI_TCP);
if (IS_ERR(tpg_np)) {
iscsit_put_tpg(tpg);
return ERR_CAST(tpg_np);
}
pr_debug("LIO_Target_ConfigFS: addnptotpg done!\n");
iscsit_put_tpg(tpg);
return &tpg_np->se_tpg_np;
}
static void lio_target_call_delnpfromtpg(
struct se_tpg_np *se_tpg_np)
{
struct iscsi_portal_group *tpg;
struct iscsi_tpg_np *tpg_np;
struct se_portal_group *se_tpg;
int ret;
tpg_np = container_of(se_tpg_np, struct iscsi_tpg_np, se_tpg_np);
tpg = tpg_np->tpg;
ret = iscsit_get_tpg(tpg);
if (ret < 0)
return;
se_tpg = &tpg->tpg_se_tpg;
pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s TPGT: %hu"
" PORTAL: %pISpc\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
tpg->tpgt, &tpg_np->tpg_np->np_sockaddr);
ret = iscsit_tpg_del_network_portal(tpg, tpg_np);
if (ret < 0)
goto out;
pr_debug("LIO_Target_ConfigFS: delnpfromtpg done!\n");
out:
iscsit_put_tpg(tpg);
}
/* End items for lio_target_np_cit */
/* Start items for lio_target_nacl_attrib_cit */
#define ISCSI_NACL_ATTR(name) \
static ssize_t iscsi_nacl_attrib_##name##_show(struct config_item *item,\
char *page) \
{ \
struct se_node_acl *se_nacl = attrib_to_nacl(item); \
struct iscsi_node_acl *nacl = to_iscsi_nacl(se_nacl); \
return sysfs_emit(page, "%u\n", nacl->node_attrib.name); \
} \
\
static ssize_t iscsi_nacl_attrib_##name##_store(struct config_item *item,\
const char *page, size_t count) \
{ \
struct se_node_acl *se_nacl = attrib_to_nacl(item); \
struct iscsi_node_acl *nacl = to_iscsi_nacl(se_nacl); \
u32 val; \
int ret; \
\
ret = kstrtou32(page, 0, &val); \
if (ret) \
return ret; \
ret = iscsit_na_##name(nacl, val); \
if (ret < 0) \
return ret; \
\
return count; \
} \
\
CONFIGFS_ATTR(iscsi_nacl_attrib_, name)
ISCSI_NACL_ATTR(dataout_timeout);
ISCSI_NACL_ATTR(dataout_timeout_retries);
ISCSI_NACL_ATTR(default_erl);
ISCSI_NACL_ATTR(nopin_timeout);
ISCSI_NACL_ATTR(nopin_response_timeout);
ISCSI_NACL_ATTR(random_datain_pdu_offsets);
ISCSI_NACL_ATTR(random_datain_seq_offsets);
ISCSI_NACL_ATTR(random_r2t_offsets);
static ssize_t iscsi_nacl_attrib_authentication_show(struct config_item *item,
char *page)
{
struct se_node_acl *se_nacl = attrib_to_nacl(item);
struct iscsi_node_acl *nacl = to_iscsi_nacl(se_nacl);
return sysfs_emit(page, "%d\n", nacl->node_attrib.authentication);
}
static ssize_t iscsi_nacl_attrib_authentication_store(struct config_item *item,
const char *page, size_t count)
{
struct se_node_acl *se_nacl = attrib_to_nacl(item);
struct iscsi_node_acl *nacl = to_iscsi_nacl(se_nacl);
s32 val;
int ret;
ret = kstrtos32(page, 0, &val);
if (ret)
return ret;
if (val != 0 && val != 1 && val != NA_AUTHENTICATION_INHERITED)
return -EINVAL;
nacl->node_attrib.authentication = val;
return count;
}
CONFIGFS_ATTR(iscsi_nacl_attrib_, authentication);
static struct configfs_attribute *lio_target_nacl_attrib_attrs[] = {
&iscsi_nacl_attrib_attr_dataout_timeout,
&iscsi_nacl_attrib_attr_dataout_timeout_retries,
&iscsi_nacl_attrib_attr_default_erl,
&iscsi_nacl_attrib_attr_nopin_timeout,
&iscsi_nacl_attrib_attr_nopin_response_timeout,
&iscsi_nacl_attrib_attr_random_datain_pdu_offsets,
&iscsi_nacl_attrib_attr_random_datain_seq_offsets,
&iscsi_nacl_attrib_attr_random_r2t_offsets,
&iscsi_nacl_attrib_attr_authentication,
NULL,
};
/* End items for lio_target_nacl_attrib_cit */
/* Start items for lio_target_nacl_auth_cit */
#define __DEF_NACL_AUTH_STR(prefix, name, flags) \
static ssize_t __iscsi_##prefix##_##name##_show( \
struct iscsi_node_acl *nacl, \
char *page) \
{ \
struct iscsi_node_auth *auth = &nacl->node_auth; \
\
if (!capable(CAP_SYS_ADMIN)) \
return -EPERM; \
return snprintf(page, PAGE_SIZE, "%s\n", auth->name); \
} \
\
static ssize_t __iscsi_##prefix##_##name##_store( \
struct iscsi_node_acl *nacl, \
const char *page, \
size_t count) \
{ \
struct iscsi_node_auth *auth = &nacl->node_auth; \
\
if (!capable(CAP_SYS_ADMIN)) \
return -EPERM; \
if (count >= sizeof(auth->name)) \
return -EINVAL; \
snprintf(auth->name, sizeof(auth->name), "%s", page); \
if (!strncmp("NULL", auth->name, 4)) \
auth->naf_flags &= ~flags; \
else \
auth->naf_flags |= flags; \
\
if ((auth->naf_flags & NAF_USERID_IN_SET) && \
(auth->naf_flags & NAF_PASSWORD_IN_SET)) \
auth->authenticate_target = 1; \
else \
auth->authenticate_target = 0; \
\
return count; \
}
#define DEF_NACL_AUTH_STR(name, flags) \
__DEF_NACL_AUTH_STR(nacl_auth, name, flags) \
static ssize_t iscsi_nacl_auth_##name##_show(struct config_item *item, \
char *page) \
{ \
struct se_node_acl *nacl = auth_to_nacl(item); \
return __iscsi_nacl_auth_##name##_show(to_iscsi_nacl(nacl), page); \
} \
static ssize_t iscsi_nacl_auth_##name##_store(struct config_item *item, \
const char *page, size_t count) \
{ \
struct se_node_acl *nacl = auth_to_nacl(item); \
return __iscsi_nacl_auth_##name##_store(to_iscsi_nacl(nacl), \
page, count); \
} \
\
CONFIGFS_ATTR(iscsi_nacl_auth_, name)
/*
* One-way authentication userid
*/
DEF_NACL_AUTH_STR(userid, NAF_USERID_SET);
DEF_NACL_AUTH_STR(password, NAF_PASSWORD_SET);
DEF_NACL_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
DEF_NACL_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
#define __DEF_NACL_AUTH_INT(prefix, name) \
static ssize_t __iscsi_##prefix##_##name##_show( \
struct iscsi_node_acl *nacl, \
char *page) \
{ \
struct iscsi_node_auth *auth = &nacl->node_auth; \
\
if (!capable(CAP_SYS_ADMIN)) \
return -EPERM; \
\
return snprintf(page, PAGE_SIZE, "%d\n", auth->name); \
}
#define DEF_NACL_AUTH_INT(name) \
__DEF_NACL_AUTH_INT(nacl_auth, name) \
static ssize_t iscsi_nacl_auth_##name##_show(struct config_item *item, \
char *page) \
{ \
struct se_node_acl *nacl = auth_to_nacl(item); \
return __iscsi_nacl_auth_##name##_show(to_iscsi_nacl(nacl), page); \
} \
\
CONFIGFS_ATTR_RO(iscsi_nacl_auth_, name)
DEF_NACL_AUTH_INT(authenticate_target);
static struct configfs_attribute *lio_target_nacl_auth_attrs[] = {
&iscsi_nacl_auth_attr_userid,
&iscsi_nacl_auth_attr_password,
&iscsi_nacl_auth_attr_authenticate_target,
&iscsi_nacl_auth_attr_userid_mutual,
&iscsi_nacl_auth_attr_password_mutual,
NULL,
};
/* End items for lio_target_nacl_auth_cit */
/* Start items for lio_target_nacl_param_cit */
#define ISCSI_NACL_PARAM(name) \
static ssize_t iscsi_nacl_param_##name##_show(struct config_item *item, \
char *page) \
{ \
struct se_node_acl *se_nacl = param_to_nacl(item); \
struct iscsit_session *sess; \
struct se_session *se_sess; \
ssize_t rb; \
\
spin_lock_bh(&se_nacl->nacl_sess_lock); \
se_sess = se_nacl->nacl_sess; \
if (!se_sess) { \
rb = snprintf(page, PAGE_SIZE, \
"No Active iSCSI Session\n"); \
} else { \
sess = se_sess->fabric_sess_ptr; \
rb = snprintf(page, PAGE_SIZE, "%u\n", \
(u32)sess->sess_ops->name); \
} \
spin_unlock_bh(&se_nacl->nacl_sess_lock); \
\
return rb; \
} \
\
CONFIGFS_ATTR_RO(iscsi_nacl_param_, name)
ISCSI_NACL_PARAM(MaxConnections);
ISCSI_NACL_PARAM(InitialR2T);
ISCSI_NACL_PARAM(ImmediateData);
ISCSI_NACL_PARAM(MaxBurstLength);
ISCSI_NACL_PARAM(FirstBurstLength);
ISCSI_NACL_PARAM(DefaultTime2Wait);
ISCSI_NACL_PARAM(DefaultTime2Retain);
ISCSI_NACL_PARAM(MaxOutstandingR2T);
ISCSI_NACL_PARAM(DataPDUInOrder);
ISCSI_NACL_PARAM(DataSequenceInOrder);
ISCSI_NACL_PARAM(ErrorRecoveryLevel);
static struct configfs_attribute *lio_target_nacl_param_attrs[] = {
&iscsi_nacl_param_attr_MaxConnections,
&iscsi_nacl_param_attr_InitialR2T,
&iscsi_nacl_param_attr_ImmediateData,
&iscsi_nacl_param_attr_MaxBurstLength,
&iscsi_nacl_param_attr_FirstBurstLength,
&iscsi_nacl_param_attr_DefaultTime2Wait,
&iscsi_nacl_param_attr_DefaultTime2Retain,
&iscsi_nacl_param_attr_MaxOutstandingR2T,
&iscsi_nacl_param_attr_DataPDUInOrder,
&iscsi_nacl_param_attr_DataSequenceInOrder,
&iscsi_nacl_param_attr_ErrorRecoveryLevel,
NULL,
};
/* End items for lio_target_nacl_param_cit */
/* Start items for lio_target_acl_cit */
static ssize_t lio_target_nacl_info_show(struct config_item *item, char *page)
{
struct se_node_acl *se_nacl = acl_to_nacl(item);
struct iscsit_session *sess;
struct iscsit_conn *conn;
struct se_session *se_sess;
ssize_t rb = 0;
u32 max_cmd_sn;
spin_lock_bh(&se_nacl->nacl_sess_lock);
se_sess = se_nacl->nacl_sess;
if (!se_sess) {
rb += sysfs_emit_at(page, rb, "No active iSCSI Session for Initiator"
" Endpoint: %s\n", se_nacl->initiatorname);
} else {
sess = se_sess->fabric_sess_ptr;
rb += sysfs_emit_at(page, rb, "InitiatorName: %s\n",
sess->sess_ops->InitiatorName);
rb += sysfs_emit_at(page, rb, "InitiatorAlias: %s\n",
sess->sess_ops->InitiatorAlias);
rb += sysfs_emit_at(page, rb,
"LIO Session ID: %u ISID: 0x%6ph TSIH: %hu ",
sess->sid, sess->isid, sess->tsih);
rb += sysfs_emit_at(page, rb, "SessionType: %s\n",
(sess->sess_ops->SessionType) ?
"Discovery" : "Normal");
rb += sysfs_emit_at(page, rb, "Session State: ");
switch (sess->session_state) {
case TARG_SESS_STATE_FREE:
rb += sysfs_emit_at(page, rb, "TARG_SESS_FREE\n");
break;
case TARG_SESS_STATE_ACTIVE:
rb += sysfs_emit_at(page, rb, "TARG_SESS_STATE_ACTIVE\n");
break;
case TARG_SESS_STATE_LOGGED_IN:
rb += sysfs_emit_at(page, rb, "TARG_SESS_STATE_LOGGED_IN\n");
break;
case TARG_SESS_STATE_FAILED:
rb += sysfs_emit_at(page, rb, "TARG_SESS_STATE_FAILED\n");
break;
case TARG_SESS_STATE_IN_CONTINUE:
rb += sysfs_emit_at(page, rb, "TARG_SESS_STATE_IN_CONTINUE\n");
break;
default:
rb += sysfs_emit_at(page, rb, "ERROR: Unknown Session"
" State!\n");
break;
}
rb += sysfs_emit_at(page, rb, "---------------------[iSCSI Session"
" Values]-----------------------\n");
rb += sysfs_emit_at(page, rb, " CmdSN/WR : CmdSN/WC : ExpCmdSN"
" : MaxCmdSN : ITT : TTT\n");
max_cmd_sn = (u32) atomic_read(&sess->max_cmd_sn);
rb += sysfs_emit_at(page, rb, " 0x%08x 0x%08x 0x%08x 0x%08x"
" 0x%08x 0x%08x\n",
sess->cmdsn_window,
(max_cmd_sn - sess->exp_cmd_sn) + 1,
sess->exp_cmd_sn, max_cmd_sn,
sess->init_task_tag, sess->targ_xfer_tag);
rb += sysfs_emit_at(page, rb, "----------------------[iSCSI"
" Connections]-------------------------\n");
spin_lock(&sess->conn_lock);
list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
rb += sysfs_emit_at(page, rb, "CID: %hu Connection"
" State: ", conn->cid);
switch (conn->conn_state) {
case TARG_CONN_STATE_FREE:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_FREE\n");
break;
case TARG_CONN_STATE_XPT_UP:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_XPT_UP\n");
break;
case TARG_CONN_STATE_IN_LOGIN:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_IN_LOGIN\n");
break;
case TARG_CONN_STATE_LOGGED_IN:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_LOGGED_IN\n");
break;
case TARG_CONN_STATE_IN_LOGOUT:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_IN_LOGOUT\n");
break;
case TARG_CONN_STATE_LOGOUT_REQUESTED:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_LOGOUT_REQUESTED\n");
break;
case TARG_CONN_STATE_CLEANUP_WAIT:
rb += sysfs_emit_at(page, rb,
"TARG_CONN_STATE_CLEANUP_WAIT\n");
break;
default:
rb += sysfs_emit_at(page, rb,
"ERROR: Unknown Connection State!\n");
break;
}
rb += sysfs_emit_at(page, rb, " Address %pISc %s", &conn->login_sockaddr,
(conn->network_transport == ISCSI_TCP) ?
"TCP" : "SCTP");
rb += sysfs_emit_at(page, rb, " StatSN: 0x%08x\n",
conn->stat_sn);
}
spin_unlock(&sess->conn_lock);
}
spin_unlock_bh(&se_nacl->nacl_sess_lock);
return rb;
}
static ssize_t lio_target_nacl_cmdsn_depth_show(struct config_item *item,
char *page)
{
return sysfs_emit(page, "%u\n", acl_to_nacl(item)->queue_depth);
}
static ssize_t lio_target_nacl_cmdsn_depth_store(struct config_item *item,
const char *page, size_t count)
{
struct se_node_acl *se_nacl = acl_to_nacl(item);
struct se_portal_group *se_tpg = se_nacl->se_tpg;
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg);
struct config_item *acl_ci, *tpg_ci, *wwn_ci;
u32 cmdsn_depth = 0;
int ret;
ret = kstrtou32(page, 0, &cmdsn_depth);
if (ret)
return ret;
if (cmdsn_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
pr_err("Passed cmdsn_depth: %u exceeds"
" TA_DEFAULT_CMDSN_DEPTH_MAX: %u\n", cmdsn_depth,
TA_DEFAULT_CMDSN_DEPTH_MAX);
return -EINVAL;
}
acl_ci = &se_nacl->acl_group.cg_item;
if (!acl_ci) {
pr_err("Unable to locatel acl_ci\n");
return -EINVAL;
}
tpg_ci = &acl_ci->ci_parent->ci_group->cg_item;
if (!tpg_ci) {
pr_err("Unable to locate tpg_ci\n");
return -EINVAL;
}
wwn_ci = &tpg_ci->ci_group->cg_item;
if (!wwn_ci) {
pr_err("Unable to locate config_item wwn_ci\n");
return -EINVAL;
}
if (iscsit_get_tpg(tpg) < 0)
return -EINVAL;
ret = core_tpg_set_initiator_node_queue_depth(se_nacl, cmdsn_depth);
pr_debug("LIO_Target_ConfigFS: %s/%s Set CmdSN Window: %u for"
"InitiatorName: %s\n", config_item_name(wwn_ci),
config_item_name(tpg_ci), cmdsn_depth,
config_item_name(acl_ci));
iscsit_put_tpg(tpg);
return (!ret) ? count : (ssize_t)ret;
}
static ssize_t lio_target_nacl_tag_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s", acl_to_nacl(item)->acl_tag);
}
static ssize_t lio_target_nacl_tag_store(struct config_item *item,
const char *page, size_t count)
{
struct se_node_acl *se_nacl = acl_to_nacl(item);
int ret;
ret = core_tpg_set_initiator_node_tag(se_nacl->se_tpg, se_nacl, page);
if (ret < 0)
return ret;
return count;
}
CONFIGFS_ATTR_RO(lio_target_nacl_, info);
CONFIGFS_ATTR(lio_target_nacl_, cmdsn_depth);
CONFIGFS_ATTR(lio_target_nacl_, tag);
static struct configfs_attribute *lio_target_initiator_attrs[] = {
&lio_target_nacl_attr_info,
&lio_target_nacl_attr_cmdsn_depth,
&lio_target_nacl_attr_tag,
NULL,
};
static int lio_target_init_nodeacl(struct se_node_acl *se_nacl,
const char *name)
{
struct iscsi_node_acl *acl = to_iscsi_nacl(se_nacl);
config_group_init_type_name(&acl->node_stat_grps.iscsi_sess_stats_group,
"iscsi_sess_stats", &iscsi_stat_sess_cit);
configfs_add_default_group(&acl->node_stat_grps.iscsi_sess_stats_group,
&se_nacl->acl_fabric_stat_group);
return 0;
}
/* End items for lio_target_acl_cit */
/* Start items for lio_target_tpg_attrib_cit */
#define DEF_TPG_ATTRIB(name) \
\
static ssize_t iscsi_tpg_attrib_##name##_show(struct config_item *item, \
char *page) \
{ \
struct se_portal_group *se_tpg = attrib_to_tpg(item); \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
ssize_t rb; \
\
if (iscsit_get_tpg(tpg) < 0) \
return -EINVAL; \
\
rb = sysfs_emit(page, "%u\n", tpg->tpg_attrib.name); \
iscsit_put_tpg(tpg); \
return rb; \
} \
\
static ssize_t iscsi_tpg_attrib_##name##_store(struct config_item *item,\
const char *page, size_t count) \
{ \
struct se_portal_group *se_tpg = attrib_to_tpg(item); \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
u32 val; \
int ret; \
\
if (iscsit_get_tpg(tpg) < 0) \
return -EINVAL; \
\
ret = kstrtou32(page, 0, &val); \
if (ret) \
goto out; \
ret = iscsit_ta_##name(tpg, val); \
if (ret < 0) \
goto out; \
\
iscsit_put_tpg(tpg); \
return count; \
out: \
iscsit_put_tpg(tpg); \
return ret; \
} \
CONFIGFS_ATTR(iscsi_tpg_attrib_, name)
DEF_TPG_ATTRIB(authentication);
DEF_TPG_ATTRIB(login_timeout);
DEF_TPG_ATTRIB(generate_node_acls);
DEF_TPG_ATTRIB(default_cmdsn_depth);
DEF_TPG_ATTRIB(cache_dynamic_acls);
DEF_TPG_ATTRIB(demo_mode_write_protect);
DEF_TPG_ATTRIB(prod_mode_write_protect);
DEF_TPG_ATTRIB(demo_mode_discovery);
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,
&iscsi_tpg_attrib_attr_login_timeout,
&iscsi_tpg_attrib_attr_generate_node_acls,
&iscsi_tpg_attrib_attr_default_cmdsn_depth,
&iscsi_tpg_attrib_attr_cache_dynamic_acls,
&iscsi_tpg_attrib_attr_demo_mode_write_protect,
&iscsi_tpg_attrib_attr_prod_mode_write_protect,
&iscsi_tpg_attrib_attr_demo_mode_discovery,
&iscsi_tpg_attrib_attr_default_erl,
&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,
};
/* End items for lio_target_tpg_attrib_cit */
/* Start items for lio_target_tpg_auth_cit */
#define __DEF_TPG_AUTH_STR(prefix, name, flags) \
static ssize_t __iscsi_##prefix##_##name##_show(struct se_portal_group *se_tpg, \
char *page) \
{ \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
struct iscsi_node_auth *auth = &tpg->tpg_demo_auth; \
\
if (!capable(CAP_SYS_ADMIN)) \
return -EPERM; \
\
return snprintf(page, PAGE_SIZE, "%s\n", auth->name); \
} \
\
static ssize_t __iscsi_##prefix##_##name##_store(struct se_portal_group *se_tpg,\
const char *page, size_t count) \
{ \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
struct iscsi_node_auth *auth = &tpg->tpg_demo_auth; \
\
if (!capable(CAP_SYS_ADMIN)) \
return -EPERM; \
\
snprintf(auth->name, sizeof(auth->name), "%s", page); \
if (!(strncmp("NULL", auth->name, 4))) \
auth->naf_flags &= ~flags; \
else \
auth->naf_flags |= flags; \
\
if ((auth->naf_flags & NAF_USERID_IN_SET) && \
(auth->naf_flags & NAF_PASSWORD_IN_SET)) \
auth->authenticate_target = 1; \
else \
auth->authenticate_target = 0; \
\
return count; \
}
#define DEF_TPG_AUTH_STR(name, flags) \
__DEF_TPG_AUTH_STR(tpg_auth, name, flags) \
static ssize_t iscsi_tpg_auth_##name##_show(struct config_item *item, \
char *page) \
{ \
return __iscsi_tpg_auth_##name##_show(auth_to_tpg(item), page); \
} \
\
static ssize_t iscsi_tpg_auth_##name##_store(struct config_item *item, \
const char *page, size_t count) \
{ \
return __iscsi_tpg_auth_##name##_store(auth_to_tpg(item), page, count); \
} \
\
CONFIGFS_ATTR(iscsi_tpg_auth_, name);
DEF_TPG_AUTH_STR(userid, NAF_USERID_SET);
DEF_TPG_AUTH_STR(password, NAF_PASSWORD_SET);
DEF_TPG_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
DEF_TPG_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
#define __DEF_TPG_AUTH_INT(prefix, name) \
static ssize_t __iscsi_##prefix##_##name##_show(struct se_portal_group *se_tpg, \
char *page) \
{ \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
struct iscsi_node_auth *auth = &tpg->tpg_demo_auth; \
\
if (!capable(CAP_SYS_ADMIN)) \
return -EPERM; \
\
return snprintf(page, PAGE_SIZE, "%d\n", auth->name); \
}
#define DEF_TPG_AUTH_INT(name) \
__DEF_TPG_AUTH_INT(tpg_auth, name) \
static ssize_t iscsi_tpg_auth_##name##_show(struct config_item *item, \
char *page) \
{ \
return __iscsi_tpg_auth_##name##_show(auth_to_tpg(item), page); \
} \
CONFIGFS_ATTR_RO(iscsi_tpg_auth_, name);
DEF_TPG_AUTH_INT(authenticate_target);
static struct configfs_attribute *lio_target_tpg_auth_attrs[] = {
&iscsi_tpg_auth_attr_userid,
&iscsi_tpg_auth_attr_password,
&iscsi_tpg_auth_attr_authenticate_target,
&iscsi_tpg_auth_attr_userid_mutual,
&iscsi_tpg_auth_attr_password_mutual,
NULL,
};
/* End items for lio_target_tpg_auth_cit */
/* Start items for lio_target_tpg_param_cit */
#define DEF_TPG_PARAM(name) \
static ssize_t iscsi_tpg_param_##name##_show(struct config_item *item, \
char *page) \
{ \
struct se_portal_group *se_tpg = param_to_tpg(item); \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
struct iscsi_param *param; \
ssize_t rb; \
\
if (iscsit_get_tpg(tpg) < 0) \
return -EINVAL; \
\
param = iscsi_find_param_from_key(__stringify(name), \
tpg->param_list); \
if (!param) { \
iscsit_put_tpg(tpg); \
return -EINVAL; \
} \
rb = snprintf(page, PAGE_SIZE, "%s\n", param->value); \
\
iscsit_put_tpg(tpg); \
return rb; \
} \
static ssize_t iscsi_tpg_param_##name##_store(struct config_item *item, \
const char *page, size_t count) \
{ \
struct se_portal_group *se_tpg = param_to_tpg(item); \
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg); \
char *buf; \
int ret, len; \
\
buf = kzalloc(PAGE_SIZE, GFP_KERNEL); \
if (!buf) \
return -ENOMEM; \
len = snprintf(buf, PAGE_SIZE, "%s=%s", __stringify(name), page); \
if (isspace(buf[len-1])) \
buf[len-1] = '\0'; /* Kill newline */ \
\
if (iscsit_get_tpg(tpg) < 0) { \
kfree(buf); \
return -EINVAL; \
} \
\
ret = iscsi_change_param_value(buf, tpg->param_list, 1); \
if (ret < 0) \
goto out; \
\
kfree(buf); \
iscsit_put_tpg(tpg); \
return count; \
out: \
kfree(buf); \
iscsit_put_tpg(tpg); \
return -EINVAL; \
} \
CONFIGFS_ATTR(iscsi_tpg_param_, name)
DEF_TPG_PARAM(AuthMethod);
DEF_TPG_PARAM(HeaderDigest);
DEF_TPG_PARAM(DataDigest);
DEF_TPG_PARAM(MaxConnections);
DEF_TPG_PARAM(TargetAlias);
DEF_TPG_PARAM(InitialR2T);
DEF_TPG_PARAM(ImmediateData);
DEF_TPG_PARAM(MaxRecvDataSegmentLength);
DEF_TPG_PARAM(MaxXmitDataSegmentLength);
DEF_TPG_PARAM(MaxBurstLength);
DEF_TPG_PARAM(FirstBurstLength);
DEF_TPG_PARAM(DefaultTime2Wait);
DEF_TPG_PARAM(DefaultTime2Retain);
DEF_TPG_PARAM(MaxOutstandingR2T);
DEF_TPG_PARAM(DataPDUInOrder);
DEF_TPG_PARAM(DataSequenceInOrder);
DEF_TPG_PARAM(ErrorRecoveryLevel);
DEF_TPG_PARAM(IFMarker);
DEF_TPG_PARAM(OFMarker);
DEF_TPG_PARAM(IFMarkInt);
DEF_TPG_PARAM(OFMarkInt);
static struct configfs_attribute *lio_target_tpg_param_attrs[] = {
&iscsi_tpg_param_attr_AuthMethod,
&iscsi_tpg_param_attr_HeaderDigest,
&iscsi_tpg_param_attr_DataDigest,
&iscsi_tpg_param_attr_MaxConnections,
&iscsi_tpg_param_attr_TargetAlias,
&iscsi_tpg_param_attr_InitialR2T,
&iscsi_tpg_param_attr_ImmediateData,
&iscsi_tpg_param_attr_MaxRecvDataSegmentLength,
&iscsi_tpg_param_attr_MaxXmitDataSegmentLength,
&iscsi_tpg_param_attr_MaxBurstLength,
&iscsi_tpg_param_attr_FirstBurstLength,
&iscsi_tpg_param_attr_DefaultTime2Wait,
&iscsi_tpg_param_attr_DefaultTime2Retain,
&iscsi_tpg_param_attr_MaxOutstandingR2T,
&iscsi_tpg_param_attr_DataPDUInOrder,
&iscsi_tpg_param_attr_DataSequenceInOrder,
&iscsi_tpg_param_attr_ErrorRecoveryLevel,
&iscsi_tpg_param_attr_IFMarker,
&iscsi_tpg_param_attr_OFMarker,
&iscsi_tpg_param_attr_IFMarkInt,
&iscsi_tpg_param_attr_OFMarkInt,
NULL,
};
/* End items for lio_target_tpg_param_cit */
/* Start items for lio_target_tpg_cit */
static ssize_t lio_target_tpg_dynamic_sessions_show(struct config_item *item,
char *page)
{
return target_show_dynamic_sessions(to_tpg(item), page);
}
CONFIGFS_ATTR_RO(lio_target_tpg_, dynamic_sessions);
static struct configfs_attribute *lio_target_tpg_attrs[] = {
&lio_target_tpg_attr_dynamic_sessions,
NULL,
};
/* End items for lio_target_tpg_cit */
/* Start items for lio_target_tiqn_cit */
static struct se_portal_group *lio_target_tiqn_addtpg(struct se_wwn *wwn,
const char *name)
{
struct iscsi_portal_group *tpg;
struct iscsi_tiqn *tiqn;
char *tpgt_str;
int ret;
u16 tpgt;
tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
/*
* Only tpgt_# directory groups can be created below
* target/iscsi/iqn.superturodiskarry/
*/
tpgt_str = strstr(name, "tpgt_");
if (!tpgt_str) {
pr_err("Unable to locate \"tpgt_#\" directory"
" group\n");
return NULL;
}
tpgt_str += 5; /* Skip ahead of "tpgt_" */
ret = kstrtou16(tpgt_str, 0, &tpgt);
if (ret)
return NULL;
tpg = iscsit_alloc_portal_group(tiqn, tpgt);
if (!tpg)
return NULL;
ret = core_tpg_register(wwn, &tpg->tpg_se_tpg, SCSI_PROTOCOL_ISCSI);
if (ret < 0)
goto free_out;
ret = iscsit_tpg_add_portal_group(tiqn, tpg);
if (ret != 0)
goto out;
pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated TPG: %s\n",
name);
return &tpg->tpg_se_tpg;
out:
core_tpg_deregister(&tpg->tpg_se_tpg);
free_out:
kfree(tpg);
return NULL;
}
static int lio_target_tiqn_enabletpg(struct se_portal_group *se_tpg,
bool enable)
{
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg);
int ret;
ret = iscsit_get_tpg(tpg);
if (ret < 0)
return -EINVAL;
if (enable) {
ret = iscsit_tpg_enable_portal_group(tpg);
if (ret < 0)
goto out;
} else {
/*
* iscsit_tpg_disable_portal_group() assumes force=1
*/
ret = iscsit_tpg_disable_portal_group(tpg, 1);
if (ret < 0)
goto out;
}
iscsit_put_tpg(tpg);
return 0;
out:
iscsit_put_tpg(tpg);
return -EINVAL;
}
static void lio_target_tiqn_deltpg(struct se_portal_group *se_tpg)
{
struct iscsi_portal_group *tpg;
struct iscsi_tiqn *tiqn;
tpg = to_iscsi_tpg(se_tpg);
tiqn = tpg->tpg_tiqn;
/*
* iscsit_tpg_del_portal_group() assumes force=1
*/
pr_debug("LIO_Target_ConfigFS: DEREGISTER -> Releasing TPG\n");
iscsit_tpg_del_portal_group(tiqn, tpg, 1);
}
/* End items for lio_target_tiqn_cit */
/* Start LIO-Target TIQN struct contig_item lio_target_cit */
static ssize_t lio_target_wwn_lio_version_show(struct config_item *item,
char *page)
{
return sysfs_emit(page, "Datera Inc. iSCSI Target %s\n", ISCSIT_VERSION);
}
CONFIGFS_ATTR_RO(lio_target_wwn_, lio_version);
static ssize_t lio_target_wwn_cpus_allowed_list_show(
struct config_item *item, char *page)
{
return sysfs_emit(page, "%*pbl\n",
cpumask_pr_args(iscsit_global->allowed_cpumask));
}
static ssize_t lio_target_wwn_cpus_allowed_list_store(
struct config_item *item, const char *page, size_t count)
{
int ret = -ENOMEM;
char *orig;
cpumask_var_t new_allowed_cpumask;
if (!zalloc_cpumask_var(&new_allowed_cpumask, GFP_KERNEL))
goto out;
orig = kstrdup(page, GFP_KERNEL);
if (!orig)
goto out_free_cpumask;
ret = cpulist_parse(orig, new_allowed_cpumask);
if (!ret)
cpumask_copy(iscsit_global->allowed_cpumask,
new_allowed_cpumask);
kfree(orig);
out_free_cpumask:
free_cpumask_var(new_allowed_cpumask);
out:
return ret ? ret : count;
}
CONFIGFS_ATTR(lio_target_wwn_, cpus_allowed_list);
static struct configfs_attribute *lio_target_wwn_attrs[] = {
&lio_target_wwn_attr_lio_version,
&lio_target_wwn_attr_cpus_allowed_list,
NULL,
};
static struct se_wwn *lio_target_call_coreaddtiqn(
struct target_fabric_configfs *tf,
struct config_group *group,
const char *name)
{
struct iscsi_tiqn *tiqn;
tiqn = iscsit_add_tiqn((unsigned char *)name);
if (IS_ERR(tiqn))
return ERR_CAST(tiqn);
pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated Node:"
" %s\n", name);
return &tiqn->tiqn_wwn;
}
static void lio_target_add_wwn_groups(struct se_wwn *wwn)
{
struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_instance_group,
"iscsi_instance", &iscsi_stat_instance_cit);
configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_instance_group,
&tiqn->tiqn_wwn.fabric_stat_group);
config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_sess_err_group,
"iscsi_sess_err", &iscsi_stat_sess_err_cit);
configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_sess_err_group,
&tiqn->tiqn_wwn.fabric_stat_group);
config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_tgt_attr_group,
"iscsi_tgt_attr", &iscsi_stat_tgt_attr_cit);
configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_tgt_attr_group,
&tiqn->tiqn_wwn.fabric_stat_group);
config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_login_stats_group,
"iscsi_login_stats", &iscsi_stat_login_cit);
configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_login_stats_group,
&tiqn->tiqn_wwn.fabric_stat_group);
config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_logout_stats_group,
"iscsi_logout_stats", &iscsi_stat_logout_cit);
configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_logout_stats_group,
&tiqn->tiqn_wwn.fabric_stat_group);
}
static void lio_target_call_coredeltiqn(
struct se_wwn *wwn)
{
struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s\n",
tiqn->tiqn);
iscsit_del_tiqn(tiqn);
}
/* End LIO-Target TIQN struct contig_lio_target_cit */
/* Start lio_target_discovery_auth_cit */
#define DEF_DISC_AUTH_STR(name, flags) \
__DEF_NACL_AUTH_STR(disc, name, flags) \
static ssize_t iscsi_disc_##name##_show(struct config_item *item, char *page) \
{ \
return __iscsi_disc_##name##_show(&iscsit_global->discovery_acl,\
page); \
} \
static ssize_t iscsi_disc_##name##_store(struct config_item *item, \
const char *page, size_t count) \
{ \
return __iscsi_disc_##name##_store(&iscsit_global->discovery_acl, \
page, count); \
\
} \
CONFIGFS_ATTR(iscsi_disc_, name)
DEF_DISC_AUTH_STR(userid, NAF_USERID_SET);
DEF_DISC_AUTH_STR(password, NAF_PASSWORD_SET);
DEF_DISC_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
DEF_DISC_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
#define DEF_DISC_AUTH_INT(name) \
__DEF_NACL_AUTH_INT(disc, name) \
static ssize_t iscsi_disc_##name##_show(struct config_item *item, char *page) \
{ \
return __iscsi_disc_##name##_show(&iscsit_global->discovery_acl, \
page); \
} \
CONFIGFS_ATTR_RO(iscsi_disc_, name)
DEF_DISC_AUTH_INT(authenticate_target);
static ssize_t iscsi_disc_enforce_discovery_auth_show(struct config_item *item,
char *page)
{
struct iscsi_node_auth *discovery_auth = &iscsit_global->discovery_acl.node_auth;
return sysfs_emit(page, "%d\n", discovery_auth->enforce_discovery_auth);
}
static ssize_t iscsi_disc_enforce_discovery_auth_store(struct config_item *item,
const char *page, size_t count)
{
struct iscsi_param *param;
struct iscsi_portal_group *discovery_tpg = iscsit_global->discovery_tpg;
u32 op;
int err;
err = kstrtou32(page, 0, &op);
if (err)
return -EINVAL;
if ((op != 1) && (op != 0)) {
pr_err("Illegal value for enforce_discovery_auth:"
" %u\n", op);
return -EINVAL;
}
if (!discovery_tpg) {
pr_err("iscsit_global->discovery_tpg is NULL\n");
return -EINVAL;
}
param = iscsi_find_param_from_key(AUTHMETHOD,
discovery_tpg->param_list);
if (!param)
return -EINVAL;
if (op) {
/*
* Reset the AuthMethod key to CHAP.
*/
if (iscsi_update_param_value(param, CHAP) < 0)
return -EINVAL;
discovery_tpg->tpg_attrib.authentication = 1;
iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 1;
pr_debug("LIO-CORE[0] Successfully enabled"
" authentication enforcement for iSCSI"
" Discovery TPG\n");
} else {
/*
* Reset the AuthMethod key to CHAP,None
*/
if (iscsi_update_param_value(param, "CHAP,None") < 0)
return -EINVAL;
discovery_tpg->tpg_attrib.authentication = 0;
iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 0;
pr_debug("LIO-CORE[0] Successfully disabled"
" authentication enforcement for iSCSI"
" Discovery TPG\n");
}
return count;
}
CONFIGFS_ATTR(iscsi_disc_, enforce_discovery_auth);
static struct configfs_attribute *lio_target_discovery_auth_attrs[] = {
&iscsi_disc_attr_userid,
&iscsi_disc_attr_password,
&iscsi_disc_attr_authenticate_target,
&iscsi_disc_attr_userid_mutual,
&iscsi_disc_attr_password_mutual,
&iscsi_disc_attr_enforce_discovery_auth,
NULL,
};
/* End lio_target_discovery_auth_cit */
/* Start functions for target_core_fabric_ops */
static int iscsi_get_cmd_state(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
return cmd->i_state;
}
static u32 lio_sess_get_index(struct se_session *se_sess)
{
struct iscsit_session *sess = se_sess->fabric_sess_ptr;
return sess->session_index;
}
static u32 lio_sess_get_initiator_sid(
struct se_session *se_sess,
unsigned char *buf,
u32 size)
{
struct iscsit_session *sess = se_sess->fabric_sess_ptr;
/*
* iSCSI Initiator Session Identifier from RFC-3720.
*/
return snprintf(buf, size, "%6phN", sess->isid);
}
static int lio_queue_data_in(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
struct iscsit_conn *conn = cmd->conn;
cmd->i_state = ISTATE_SEND_DATAIN;
return conn->conn_transport->iscsit_queue_data_in(conn, cmd);
}
static int lio_write_pending(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
struct iscsit_conn *conn = cmd->conn;
if (!cmd->immediate_data && !cmd->unsolicited_data)
return conn->conn_transport->iscsit_get_dataout(conn, cmd, false);
return 0;
}
static int lio_queue_status(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
struct iscsit_conn *conn = cmd->conn;
cmd->i_state = ISTATE_SEND_STATUS;
if (cmd->se_cmd.scsi_status || cmd->sense_reason) {
return iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
}
return conn->conn_transport->iscsit_queue_status(conn, cmd);
}
static void lio_queue_tm_rsp(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
cmd->i_state = ISTATE_SEND_TASKMGTRSP;
iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
}
static void lio_aborted_task(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
cmd->conn->conn_transport->iscsit_aborted_task(cmd->conn, cmd);
}
static char *lio_tpg_get_endpoint_wwn(struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_tiqn->tiqn;
}
static u16 lio_tpg_get_tag(struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpgt;
}
static u32 lio_tpg_get_default_depth(struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_attrib.default_cmdsn_depth;
}
static int lio_tpg_check_demo_mode(struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_attrib.generate_node_acls;
}
static int lio_tpg_check_demo_mode_cache(struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_attrib.cache_dynamic_acls;
}
static int lio_tpg_check_demo_mode_write_protect(
struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_attrib.demo_mode_write_protect;
}
static int lio_tpg_check_prod_mode_write_protect(
struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_attrib.prod_mode_write_protect;
}
static int lio_tpg_check_prot_fabric_only(
struct se_portal_group *se_tpg)
{
/*
* Only report fabric_prot_type if t10_pi has also been enabled
* for incoming ib_isert sessions.
*/
if (!to_iscsi_tpg(se_tpg)->tpg_attrib.t10_pi)
return 0;
return to_iscsi_tpg(se_tpg)->tpg_attrib.fabric_prot_type;
}
/*
* This function calls iscsit_inc_session_usage_count() on the
* struct iscsit_session in question.
*/
static void lio_tpg_close_session(struct se_session *se_sess)
{
struct iscsit_session *sess = se_sess->fabric_sess_ptr;
struct se_portal_group *se_tpg = &sess->tpg->tpg_se_tpg;
spin_lock_bh(&se_tpg->session_lock);
spin_lock(&sess->conn_lock);
if (atomic_read(&sess->session_fall_back_to_erl0) ||
atomic_read(&sess->session_logout) ||
atomic_read(&sess->session_close) ||
(sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
spin_unlock(&sess->conn_lock);
spin_unlock_bh(&se_tpg->session_lock);
return;
}
iscsit_inc_session_usage_count(sess);
atomic_set(&sess->session_reinstatement, 1);
atomic_set(&sess->session_fall_back_to_erl0, 1);
atomic_set(&sess->session_close, 1);
spin_unlock(&sess->conn_lock);
iscsit_stop_time2retain_timer(sess);
spin_unlock_bh(&se_tpg->session_lock);
iscsit_stop_session(sess, 1, 1);
iscsit_dec_session_usage_count(sess);
}
static u32 lio_tpg_get_inst_index(struct se_portal_group *se_tpg)
{
return to_iscsi_tpg(se_tpg)->tpg_tiqn->tiqn_index;
}
static void lio_set_default_node_attributes(struct se_node_acl *se_acl)
{
struct iscsi_node_acl *acl = to_iscsi_nacl(se_acl);
struct se_portal_group *se_tpg = se_acl->se_tpg;
struct iscsi_portal_group *tpg = to_iscsi_tpg(se_tpg);
acl->node_attrib.nacl = acl;
iscsit_set_default_node_attribues(acl, tpg);
}
static int lio_check_stop_free(struct se_cmd *se_cmd)
{
return target_put_sess_cmd(se_cmd);
}
static void lio_release_cmd(struct se_cmd *se_cmd)
{
struct iscsit_cmd *cmd = container_of(se_cmd, struct iscsit_cmd, se_cmd);
pr_debug("Entering lio_release_cmd for se_cmd: %p\n", se_cmd);
iscsit_release_cmd(cmd);
}
const struct target_core_fabric_ops iscsi_ops = {
.module = THIS_MODULE,
.fabric_alias = "iscsi",
.fabric_name = "iSCSI",
.node_acl_size = sizeof(struct iscsi_node_acl),
.tpg_get_wwn = lio_tpg_get_endpoint_wwn,
.tpg_get_tag = lio_tpg_get_tag,
.tpg_get_default_depth = lio_tpg_get_default_depth,
.tpg_check_demo_mode = lio_tpg_check_demo_mode,
.tpg_check_demo_mode_cache = lio_tpg_check_demo_mode_cache,
.tpg_check_demo_mode_write_protect =
lio_tpg_check_demo_mode_write_protect,
.tpg_check_prod_mode_write_protect =
lio_tpg_check_prod_mode_write_protect,
.tpg_check_prot_fabric_only = &lio_tpg_check_prot_fabric_only,
.tpg_get_inst_index = lio_tpg_get_inst_index,
.check_stop_free = lio_check_stop_free,
.release_cmd = lio_release_cmd,
.close_session = lio_tpg_close_session,
.sess_get_index = lio_sess_get_index,
.sess_get_initiator_sid = lio_sess_get_initiator_sid,
.write_pending = lio_write_pending,
.set_default_node_attributes = lio_set_default_node_attributes,
.get_cmd_state = iscsi_get_cmd_state,
.queue_data_in = lio_queue_data_in,
.queue_status = lio_queue_status,
.queue_tm_rsp = lio_queue_tm_rsp,
.aborted_task = lio_aborted_task,
.fabric_make_wwn = lio_target_call_coreaddtiqn,
.fabric_drop_wwn = lio_target_call_coredeltiqn,
.add_wwn_groups = lio_target_add_wwn_groups,
.fabric_make_tpg = lio_target_tiqn_addtpg,
.fabric_enable_tpg = lio_target_tiqn_enabletpg,
.fabric_drop_tpg = lio_target_tiqn_deltpg,
.fabric_make_np = lio_target_call_addnptotpg,
.fabric_drop_np = lio_target_call_delnpfromtpg,
.fabric_init_nodeacl = lio_target_init_nodeacl,
.tfc_discovery_attrs = lio_target_discovery_auth_attrs,
.tfc_wwn_attrs = lio_target_wwn_attrs,
.tfc_tpg_base_attrs = lio_target_tpg_attrs,
.tfc_tpg_attrib_attrs = lio_target_tpg_attrib_attrs,
.tfc_tpg_auth_attrs = lio_target_tpg_auth_attrs,
.tfc_tpg_param_attrs = lio_target_tpg_param_attrs,
.tfc_tpg_np_base_attrs = lio_target_portal_attrs,
.tfc_tpg_nacl_base_attrs = lio_target_initiator_attrs,
.tfc_tpg_nacl_attrib_attrs = lio_target_nacl_attrib_attrs,
.tfc_tpg_nacl_auth_attrs = lio_target_nacl_auth_attrs,
.tfc_tpg_nacl_param_attrs = lio_target_nacl_param_attrs,
.write_pending_must_be_called = 1,
.default_submit_type = TARGET_DIRECT_SUBMIT,
.direct_submit_supp = 1,
};
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