// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
 * This file contains iSCSI Target Portal Group related functions.
 *
 * (c) Copyright 2007-2013 Datera, Inc.
 *
 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
 *
 ******************************************************************************/

#include <linux/slab.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include <target/iscsi/iscsi_target_core.h>
#include "iscsi_target_erl0.h"
#include "iscsi_target_login.h"
#include "iscsi_target_nodeattrib.h"
#include "iscsi_target_tpg.h"
#include "iscsi_target_util.h"
#include "iscsi_target.h"
#include "iscsi_target_parameters.h"

#include <target/iscsi/iscsi_transport.h>

struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
{
        struct iscsi_portal_group *tpg;

        tpg = kzalloc_obj(struct iscsi_portal_group);
        if (!tpg) {
                pr_err("Unable to allocate struct iscsi_portal_group\n");
                return NULL;
        }

        tpg->tpgt = tpgt;
        tpg->tpg_state = TPG_STATE_FREE;
        tpg->tpg_tiqn = tiqn;
        INIT_LIST_HEAD(&tpg->tpg_gnp_list);
        INIT_LIST_HEAD(&tpg->tpg_list);
        mutex_init(&tpg->tpg_access_lock);
        sema_init(&tpg->np_login_sem, 1);
        spin_lock_init(&tpg->tpg_state_lock);
        spin_lock_init(&tpg->tpg_np_lock);

        return tpg;
}

static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);

int iscsit_load_discovery_tpg(void)
{
        struct iscsi_param *param;
        struct iscsi_portal_group *tpg;
        int ret;

        tpg = iscsit_alloc_portal_group(NULL, 1);
        if (!tpg) {
                pr_err("Unable to allocate struct iscsi_portal_group\n");
                return -1;
        }
        /*
         * Save iscsi_ops pointer for special case discovery TPG that
         * doesn't exist as se_wwn->wwn_group within configfs.
         */
        tpg->tpg_se_tpg.se_tpg_tfo = &iscsi_ops;
        ret = core_tpg_register(NULL, &tpg->tpg_se_tpg, -1);
        if (ret < 0) {
                kfree(tpg);
                return -1;
        }

        tpg->sid = 1; /* First Assigned LIO Session ID */
        iscsit_set_default_tpg_attribs(tpg);

        if (iscsi_create_default_params(&tpg->param_list) < 0)
                goto out;
        /*
         * By default we disable authentication for discovery sessions,
         * this can be changed with:
         *
         * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
         */
        param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
        if (!param)
                goto free_pl_out;

        if (iscsi_update_param_value(param, "CHAP,None") < 0)
                goto free_pl_out;

        tpg->tpg_attrib.authentication = 0;

        spin_lock(&tpg->tpg_state_lock);
        tpg->tpg_state  = TPG_STATE_ACTIVE;
        spin_unlock(&tpg->tpg_state_lock);

        iscsit_global->discovery_tpg = tpg;
        pr_debug("CORE[0] - Allocated Discovery TPG\n");

        return 0;
free_pl_out:
        iscsi_release_param_list(tpg->param_list);
out:
        if (tpg->sid == 1)
                core_tpg_deregister(&tpg->tpg_se_tpg);
        kfree(tpg);
        return -1;
}

void iscsit_release_discovery_tpg(void)
{
        struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;

        if (!tpg)
                return;

        iscsi_release_param_list(tpg->param_list);
        core_tpg_deregister(&tpg->tpg_se_tpg);

        kfree(tpg);
        iscsit_global->discovery_tpg = NULL;
}

struct iscsi_portal_group *iscsit_get_tpg_from_np(
        struct iscsi_tiqn *tiqn,
        struct iscsi_np *np,
        struct iscsi_tpg_np **tpg_np_out)
{
        struct iscsi_portal_group *tpg = NULL;
        struct iscsi_tpg_np *tpg_np;

        spin_lock(&tiqn->tiqn_tpg_lock);
        list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {

                spin_lock(&tpg->tpg_state_lock);
                if (tpg->tpg_state != TPG_STATE_ACTIVE) {
                        spin_unlock(&tpg->tpg_state_lock);
                        continue;
                }
                spin_unlock(&tpg->tpg_state_lock);

                spin_lock(&tpg->tpg_np_lock);
                list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
                        if (tpg_np->tpg_np == np) {
                                *tpg_np_out = tpg_np;
                                kref_get(&tpg_np->tpg_np_kref);
                                spin_unlock(&tpg->tpg_np_lock);
                                spin_unlock(&tiqn->tiqn_tpg_lock);
                                return tpg;
                        }
                }
                spin_unlock(&tpg->tpg_np_lock);
        }
        spin_unlock(&tiqn->tiqn_tpg_lock);

        return NULL;
}

int iscsit_get_tpg(
        struct iscsi_portal_group *tpg)
{
        return mutex_lock_interruptible(&tpg->tpg_access_lock);
}

void iscsit_put_tpg(struct iscsi_portal_group *tpg)
{
        mutex_unlock(&tpg->tpg_access_lock);
}

static void iscsit_clear_tpg_np_login_thread(
        struct iscsi_tpg_np *tpg_np,
        struct iscsi_portal_group *tpg,
        bool shutdown)
{
        if (!tpg_np->tpg_np) {
                pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
                return;
        }

        if (shutdown)
                tpg_np->tpg_np->enabled = false;
        iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
}

static void iscsit_clear_tpg_np_login_threads(
        struct iscsi_portal_group *tpg,
        bool shutdown)
{
        struct iscsi_tpg_np *tpg_np;

        spin_lock(&tpg->tpg_np_lock);
        list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
                if (!tpg_np->tpg_np) {
                        pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
                        continue;
                }
                spin_unlock(&tpg->tpg_np_lock);
                iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
                spin_lock(&tpg->tpg_np_lock);
        }
        spin_unlock(&tpg->tpg_np_lock);
}

static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
{
        struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;

        a->authentication = TA_AUTHENTICATION;
        a->login_timeout = TA_LOGIN_TIMEOUT;
        a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
        a->generate_node_acls = TA_GENERATE_NODE_ACLS;
        a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
        a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
        a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
        a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
        a->default_erl = TA_DEFAULT_ERL;
        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)
{
        if (tpg->tpg_state != TPG_STATE_FREE) {
                pr_err("Unable to add iSCSI Target Portal Group: %d"
                        " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
                return -EEXIST;
        }
        iscsit_set_default_tpg_attribs(tpg);

        if (iscsi_create_default_params(&tpg->param_list) < 0)
                goto err_out;

        tpg->tpg_attrib.tpg = tpg;

        spin_lock(&tpg->tpg_state_lock);
        tpg->tpg_state  = TPG_STATE_INACTIVE;
        spin_unlock(&tpg->tpg_state_lock);

        spin_lock(&tiqn->tiqn_tpg_lock);
        list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
        tiqn->tiqn_ntpgs++;
        pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
                        tiqn->tiqn, tpg->tpgt);
        spin_unlock(&tiqn->tiqn_tpg_lock);

        return 0;
err_out:
        if (tpg->param_list) {
                iscsi_release_param_list(tpg->param_list);
                tpg->param_list = NULL;
        }
        return -ENOMEM;
}

int iscsit_tpg_del_portal_group(
        struct iscsi_tiqn *tiqn,
        struct iscsi_portal_group *tpg,
        int force)
{
        u8 old_state = tpg->tpg_state;

        spin_lock(&tpg->tpg_state_lock);
        tpg->tpg_state = TPG_STATE_INACTIVE;
        spin_unlock(&tpg->tpg_state_lock);

        if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
                pr_err("Unable to delete iSCSI Target Portal Group:"
                        " %hu while active sessions exist, and force=0\n",
                        tpg->tpgt);
                tpg->tpg_state = old_state;
                return -EPERM;
        }

        if (tpg->param_list) {
                iscsi_release_param_list(tpg->param_list);
                tpg->param_list = NULL;
        }

        core_tpg_deregister(&tpg->tpg_se_tpg);

        spin_lock(&tpg->tpg_state_lock);
        tpg->tpg_state = TPG_STATE_FREE;
        spin_unlock(&tpg->tpg_state_lock);

        spin_lock(&tiqn->tiqn_tpg_lock);
        tiqn->tiqn_ntpgs--;
        list_del(&tpg->tpg_list);
        spin_unlock(&tiqn->tiqn_tpg_lock);

        pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
                        tiqn->tiqn, tpg->tpgt);

        kfree(tpg);
        return 0;
}

int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
{
        struct iscsi_param *param;
        struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
        int ret;

        if (tpg->tpg_state == TPG_STATE_ACTIVE) {
                pr_err("iSCSI target portal group: %hu is already"
                        " active, ignoring request.\n", tpg->tpgt);
                return -EINVAL;
        }
        /*
         * Make sure that AuthMethod does not contain None as an option
         * unless explictly disabled.  Set the default to CHAP if authentication
         * is enforced (as per default), and remove the NONE option.
         */
        param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
        if (!param)
                return -EINVAL;

        if (tpg->tpg_attrib.authentication) {
                if (!strcmp(param->value, NONE)) {
                        ret = iscsi_update_param_value(param, CHAP);
                        if (ret)
                                goto err;
                }

                ret = iscsit_ta_authentication(tpg, 1);
                if (ret < 0)
                        goto err;
        }

        spin_lock(&tpg->tpg_state_lock);
        tpg->tpg_state = TPG_STATE_ACTIVE;
        spin_unlock(&tpg->tpg_state_lock);

        spin_lock(&tiqn->tiqn_tpg_lock);
        tiqn->tiqn_active_tpgs++;
        pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
                        tpg->tpgt);
        spin_unlock(&tiqn->tiqn_tpg_lock);

        return 0;

err:
        return ret;
}

int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
{
        struct iscsi_tiqn *tiqn;
        u8 old_state = tpg->tpg_state;

        spin_lock(&tpg->tpg_state_lock);
        if (tpg->tpg_state == TPG_STATE_INACTIVE) {
                pr_err("iSCSI Target Portal Group: %hu is already"
                        " inactive, ignoring request.\n", tpg->tpgt);
                spin_unlock(&tpg->tpg_state_lock);
                return -EINVAL;
        }
        tpg->tpg_state = TPG_STATE_INACTIVE;
        spin_unlock(&tpg->tpg_state_lock);

        iscsit_clear_tpg_np_login_threads(tpg, false);

        if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
                spin_lock(&tpg->tpg_state_lock);
                tpg->tpg_state = old_state;
                spin_unlock(&tpg->tpg_state_lock);
                pr_err("Unable to disable iSCSI Target Portal Group:"
                        " %hu while active sessions exist, and force=0\n",
                        tpg->tpgt);
                return -EPERM;
        }

        tiqn = tpg->tpg_tiqn;
        if (!tiqn || (tpg == iscsit_global->discovery_tpg))
                return 0;

        spin_lock(&tiqn->tiqn_tpg_lock);
        tiqn->tiqn_active_tpgs--;
        pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
                        tpg->tpgt);
        spin_unlock(&tiqn->tiqn_tpg_lock);

        return 0;
}

struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
        struct iscsit_session *sess)
{
        struct se_session *se_sess = sess->se_sess;
        struct se_node_acl *se_nacl = se_sess->se_node_acl;
        struct iscsi_node_acl *acl = to_iscsi_nacl(se_nacl);

        return &acl->node_attrib;
}

struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
        struct iscsi_tpg_np *tpg_np,
        int network_transport)
{
        struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;

        spin_lock(&tpg_np->tpg_np_parent_lock);
        list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
                        &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
                if (tpg_np_child->tpg_np->np_network_transport ==
                                network_transport) {
                        spin_unlock(&tpg_np->tpg_np_parent_lock);
                        return tpg_np_child;
                }
        }
        spin_unlock(&tpg_np->tpg_np_parent_lock);

        return NULL;
}

static bool iscsit_tpg_check_network_portal(
        struct iscsi_tiqn *tiqn,
        struct sockaddr_storage *sockaddr,
        int network_transport)
{
        struct iscsi_portal_group *tpg;
        struct iscsi_tpg_np *tpg_np;
        struct iscsi_np *np;
        bool match = false;

        spin_lock(&tiqn->tiqn_tpg_lock);
        list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {

                spin_lock(&tpg->tpg_np_lock);
                list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
                        np = tpg_np->tpg_np;

                        match = iscsit_check_np_match(sockaddr, np,
                                                network_transport);
                        if (match)
                                break;
                }
                spin_unlock(&tpg->tpg_np_lock);

                if (match)
                        break;
        }
        spin_unlock(&tiqn->tiqn_tpg_lock);

        return match;
}

struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
        struct iscsi_portal_group *tpg,
        struct sockaddr_storage *sockaddr,
        struct iscsi_tpg_np *tpg_np_parent,
        int network_transport)
{
        struct iscsi_np *np;
        struct iscsi_tpg_np *tpg_np;

        if (!tpg_np_parent) {
                if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
                                network_transport)) {
                        pr_err("Network Portal: %pISc already exists on a"
                                " different TPG on %s\n", sockaddr,
                                tpg->tpg_tiqn->tiqn);
                        return ERR_PTR(-EEXIST);
                }
        }

        tpg_np = kzalloc_obj(struct iscsi_tpg_np);
        if (!tpg_np) {
                pr_err("Unable to allocate memory for"
                                " struct iscsi_tpg_np.\n");
                return ERR_PTR(-ENOMEM);
        }

        np = iscsit_add_np(sockaddr, network_transport);
        if (IS_ERR(np)) {
                kfree(tpg_np);
                return ERR_CAST(np);
        }

        INIT_LIST_HEAD(&tpg_np->tpg_np_list);
        INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
        INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
        spin_lock_init(&tpg_np->tpg_np_parent_lock);
        init_completion(&tpg_np->tpg_np_comp);
        kref_init(&tpg_np->tpg_np_kref);
        tpg_np->tpg_np          = np;
        tpg_np->tpg             = tpg;

        spin_lock(&tpg->tpg_np_lock);
        list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
        tpg->num_tpg_nps++;
        if (tpg->tpg_tiqn)
                tpg->tpg_tiqn->tiqn_num_tpg_nps++;
        spin_unlock(&tpg->tpg_np_lock);

        if (tpg_np_parent) {
                tpg_np->tpg_np_parent = tpg_np_parent;
                spin_lock(&tpg_np_parent->tpg_np_parent_lock);
                list_add_tail(&tpg_np->tpg_np_child_list,
                        &tpg_np_parent->tpg_np_parent_list);
                spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
        }

        pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
                tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
                np->np_transport->name);

        return tpg_np;
}

static int iscsit_tpg_release_np(
        struct iscsi_tpg_np *tpg_np,
        struct iscsi_portal_group *tpg,
        struct iscsi_np *np)
{
        iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);

        pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
                tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
                np->np_transport->name);

        tpg_np->tpg_np = NULL;
        tpg_np->tpg = NULL;
        kfree(tpg_np);
        /*
         * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
         */
        return iscsit_del_np(np);
}

int iscsit_tpg_del_network_portal(
        struct iscsi_portal_group *tpg,
        struct iscsi_tpg_np *tpg_np)
{
        struct iscsi_np *np;
        struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
        int ret = 0;

        np = tpg_np->tpg_np;
        if (!np) {
                pr_err("Unable to locate struct iscsi_np from"
                                " struct iscsi_tpg_np\n");
                return -EINVAL;
        }

        if (!tpg_np->tpg_np_parent) {
                /*
                 * We are the parent tpg network portal.  Release all of the
                 * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
                 * list first.
                 */
                list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
                                &tpg_np->tpg_np_parent_list,
                                tpg_np_child_list) {
                        ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
                        if (ret < 0)
                                pr_err("iscsit_tpg_del_network_portal()"
                                        " failed: %d\n", ret);
                }
        } else {
                /*
                 * We are not the parent ISCSI_TCP tpg network portal.  Release
                 * our own network portals from the child list.
                 */
                spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
                list_del(&tpg_np->tpg_np_child_list);
                spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
        }

        spin_lock(&tpg->tpg_np_lock);
        list_del(&tpg_np->tpg_np_list);
        tpg->num_tpg_nps--;
        if (tpg->tpg_tiqn)
                tpg->tpg_tiqn->tiqn_num_tpg_nps--;
        spin_unlock(&tpg->tpg_np_lock);

        return iscsit_tpg_release_np(tpg_np, tpg, np);
}

int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
{
        unsigned char buf1[256], buf2[256], *none = NULL;
        int len;
        struct iscsi_param *param;
        struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;

        if ((authentication != 1) && (authentication != 0)) {
                pr_err("Illegal value for authentication parameter:"
                        " %u, ignoring request.\n", authentication);
                return -EINVAL;
        }

        memset(buf1, 0, sizeof(buf1));
        memset(buf2, 0, sizeof(buf2));

        param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
        if (!param)
                return -EINVAL;

        if (authentication) {
                snprintf(buf1, sizeof(buf1), "%s", param->value);
                none = strstr(buf1, NONE);
                if (!none)
                        goto out;
                if (!strncmp(none + 4, ",", 1)) {
                        if (!strcmp(buf1, none))
                                sprintf(buf2, "%s", none+5);
                        else {
                                none--;
                                *none = '\0';
                                len = sprintf(buf2, "%s", buf1);
                                none += 5;
                                sprintf(buf2 + len, "%s", none);
                        }
                } else {
                        none--;
                        *none = '\0';
                        sprintf(buf2, "%s", buf1);
                }
                if (iscsi_update_param_value(param, buf2) < 0)
                        return -EINVAL;
        } else {
                snprintf(buf1, sizeof(buf1), "%s", param->value);
                none = strstr(buf1, NONE);
                if (none)
                        goto out;
                strlcat(buf1, "," NONE, sizeof(buf1));
                if (iscsi_update_param_value(param, buf1) < 0)
                        return -EINVAL;
        }

out:
        a->authentication = authentication;
        pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
                a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);

        return 0;
}

int iscsit_ta_login_timeout(
        struct iscsi_portal_group *tpg,
        u32 login_timeout)
{
        struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;

        if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
                pr_err("Requested Login Timeout %u larger than maximum"
                        " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
                return -EINVAL;
        } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
                pr_err("Requested Logout Timeout %u smaller than"
                        " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
                return -EINVAL;
        }

        a->login_timeout = login_timeout;
        pr_debug("Set Logout Timeout to %u for Target Portal Group"
                " %hu\n", a->login_timeout, tpg->tpgt);

        return 0;
}

int iscsit_ta_generate_node_acls(
        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->generate_node_acls = flag;
        pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
                tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");

        if (flag == 1 && a->cache_dynamic_acls == 0) {
                pr_debug("Explicitly setting cache_dynamic_acls=1 when "
                        "generate_node_acls=1\n");
                a->cache_dynamic_acls = 1;
        }

        return 0;
}

int iscsit_ta_default_cmdsn_depth(
        struct iscsi_portal_group *tpg,
        u32 tcq_depth)
{
        struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;

        if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
                pr_err("Requested Default Queue Depth: %u larger"
                        " than maximum %u\n", tcq_depth,
                                TA_DEFAULT_CMDSN_DEPTH_MAX);
                return -EINVAL;
        } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
                pr_err("Requested Default Queue Depth: %u smaller"
                        " than minimum %u\n", tcq_depth,
                                TA_DEFAULT_CMDSN_DEPTH_MIN);
                return -EINVAL;
        }

        a->default_cmdsn_depth = tcq_depth;
        pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
                tpg->tpgt, a->default_cmdsn_depth);

        return 0;
}

int iscsit_ta_cache_dynamic_acls(
        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;
        }

        if (a->generate_node_acls == 1 && flag == 0) {
                pr_debug("Skipping cache_dynamic_acls=0 when"
                        " generate_node_acls=1\n");
                return 0;
        }

        a->cache_dynamic_acls = flag;
        pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
                " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
                "Enabled" : "Disabled");

        return 0;
}

int iscsit_ta_demo_mode_write_protect(
        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->demo_mode_write_protect = flag;
        pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
                tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");

        return 0;
}

int iscsit_ta_prod_mode_write_protect(
        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->prod_mode_write_protect = flag;
        pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
                " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
                "ON" : "OFF");

        return 0;
}

int iscsit_ta_demo_mode_discovery(
        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->demo_mode_discovery = flag;
        pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
                " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
                "ON" : "OFF");

        return 0;
}

int iscsit_ta_default_erl(
        struct iscsi_portal_group *tpg,
        u32 default_erl)
{
        struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;

        if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
                pr_err("Illegal value for default_erl: %u\n", default_erl);
                return -EINVAL;
        }

        a->default_erl = default_erl;
        pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);

        return 0;
}

int iscsit_ta_t10_pi(
        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->t10_pi = flag;
        pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
                " %s\n", tpg->tpgt, (a->t10_pi) ?
                "ON" : "OFF");

        return 0;
}

int iscsit_ta_fabric_prot_type(
        struct iscsi_portal_group *tpg,
        u32 prot_type)
{
        struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;

        if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
                pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
                return -EINVAL;
        }

        a->fabric_prot_type = prot_type;
        pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
                 tpg->tpgt, prot_type);

        return 0;
}

int iscsit_ta_tpg_enabled_sendtargets(
        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->tpg_enabled_sendtargets = flag;
        pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
                " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");

        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;
}