| // SPDX-License-Identifier: GPL-2.0-or-later |
| /******************************************************************************* |
| * Filename: target_core_fabric_configfs.c |
| * |
| * This file contains generic fabric module configfs infrastructure for |
| * TCM v4.x code |
| * |
| * (c) Copyright 2010-2013 Datera, Inc. |
| * |
| * Nicholas A. Bellinger <nab@linux-iscsi.org> |
| * |
| ****************************************************************************/ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/utsname.h> |
| #include <linux/init.h> |
| #include <linux/fs.h> |
| #include <linux/namei.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| #include <linux/delay.h> |
| #include <linux/unistd.h> |
| #include <linux/string.h> |
| #include <linux/syscalls.h> |
| #include <linux/configfs.h> |
| |
| #include <target/target_core_base.h> |
| #include <target/target_core_backend.h> |
| #include <target/target_core_fabric.h> |
| |
| #include "target_core_internal.h" |
| #include "target_core_alua.h" |
| #include "target_core_pr.h" |
| |
| #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ |
| static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \ |
| { \ |
| struct config_item_type *cit = &tf->tf_##_name##_cit; \ |
| \ |
| cit->ct_item_ops = _item_ops; \ |
| cit->ct_group_ops = _group_ops; \ |
| cit->ct_attrs = _attrs; \ |
| cit->ct_owner = tf->tf_ops->module; \ |
| pr_debug("Setup generic %s\n", __stringify(_name)); \ |
| } |
| |
| #define TF_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ |
| static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \ |
| { \ |
| struct config_item_type *cit = &tf->tf_##_name##_cit; \ |
| struct configfs_attribute **attrs = tf->tf_ops->tfc_##_name##_attrs; \ |
| \ |
| cit->ct_item_ops = _item_ops; \ |
| cit->ct_group_ops = _group_ops; \ |
| cit->ct_attrs = attrs; \ |
| cit->ct_owner = tf->tf_ops->module; \ |
| pr_debug("Setup generic %s\n", __stringify(_name)); \ |
| } |
| |
| static struct configfs_item_operations target_fabric_port_item_ops; |
| |
| /* Start of tfc_tpg_mappedlun_cit */ |
| |
| static int target_fabric_mappedlun_link( |
| struct config_item *lun_acl_ci, |
| struct config_item *lun_ci) |
| { |
| struct se_dev_entry *deve; |
| struct se_lun *lun; |
| struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci), |
| struct se_lun_acl, se_lun_group); |
| struct se_portal_group *se_tpg; |
| struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s; |
| bool lun_access_ro; |
| |
| if (!lun_ci->ci_type || |
| lun_ci->ci_type->ct_item_ops != &target_fabric_port_item_ops) { |
| pr_err("Bad lun_ci, not a valid lun_ci pointer: %p\n", lun_ci); |
| return -EFAULT; |
| } |
| lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group); |
| |
| /* |
| * Ensure that the source port exists |
| */ |
| if (!lun->lun_se_dev) { |
| pr_err("Source se_lun->lun_se_dev does not exist\n"); |
| return -EINVAL; |
| } |
| if (lun->lun_shutdown) { |
| pr_err("Unable to create mappedlun symlink because" |
| " lun->lun_shutdown=true\n"); |
| return -EINVAL; |
| } |
| se_tpg = lun->lun_tpg; |
| |
| nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item; |
| tpg_ci = &nacl_ci->ci_group->cg_item; |
| wwn_ci = &tpg_ci->ci_group->cg_item; |
| tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item; |
| wwn_ci_s = &tpg_ci_s->ci_group->cg_item; |
| /* |
| * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT |
| */ |
| if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) { |
| pr_err("Illegal Initiator ACL SymLink outside of %s\n", |
| config_item_name(wwn_ci)); |
| return -EINVAL; |
| } |
| if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) { |
| pr_err("Illegal Initiator ACL Symlink outside of %s" |
| " TPGT: %s\n", config_item_name(wwn_ci), |
| config_item_name(tpg_ci)); |
| return -EINVAL; |
| } |
| /* |
| * If this struct se_node_acl was dynamically generated with |
| * tpg_1/attrib/generate_node_acls=1, use the existing |
| * deve->lun_access_ro value, which will be true when |
| * tpg_1/attrib/demo_mode_write_protect=1 |
| */ |
| rcu_read_lock(); |
| deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun); |
| if (deve) |
| lun_access_ro = deve->lun_access_ro; |
| else |
| lun_access_ro = |
| (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect( |
| se_tpg)) ? true : false; |
| rcu_read_unlock(); |
| /* |
| * Determine the actual mapped LUN value user wants.. |
| * |
| * This value is what the SCSI Initiator actually sees the |
| * $FABRIC/$WWPN/$TPGT/lun/lun_* as on their SCSI Initiator Ports. |
| */ |
| return core_dev_add_initiator_node_lun_acl(se_tpg, lacl, lun, lun_access_ro); |
| } |
| |
| static void target_fabric_mappedlun_unlink( |
| struct config_item *lun_acl_ci, |
| struct config_item *lun_ci) |
| { |
| struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci), |
| struct se_lun_acl, se_lun_group); |
| struct se_lun *lun = container_of(to_config_group(lun_ci), |
| struct se_lun, lun_group); |
| |
| core_dev_del_initiator_node_lun_acl(lun, lacl); |
| } |
| |
| static struct se_lun_acl *item_to_lun_acl(struct config_item *item) |
| { |
| return container_of(to_config_group(item), struct se_lun_acl, |
| se_lun_group); |
| } |
| |
| static ssize_t target_fabric_mappedlun_write_protect_show( |
| struct config_item *item, char *page) |
| { |
| struct se_lun_acl *lacl = item_to_lun_acl(item); |
| struct se_node_acl *se_nacl = lacl->se_lun_nacl; |
| struct se_dev_entry *deve; |
| ssize_t len = 0; |
| |
| rcu_read_lock(); |
| deve = target_nacl_find_deve(se_nacl, lacl->mapped_lun); |
| if (deve) { |
| len = sprintf(page, "%d\n", deve->lun_access_ro); |
| } |
| rcu_read_unlock(); |
| |
| return len; |
| } |
| |
| static ssize_t target_fabric_mappedlun_write_protect_store( |
| struct config_item *item, const char *page, size_t count) |
| { |
| struct se_lun_acl *lacl = item_to_lun_acl(item); |
| struct se_node_acl *se_nacl = lacl->se_lun_nacl; |
| struct se_portal_group *se_tpg = se_nacl->se_tpg; |
| unsigned long wp; |
| int ret; |
| |
| ret = kstrtoul(page, 0, &wp); |
| if (ret) |
| return ret; |
| |
| if ((wp != 1) && (wp != 0)) |
| return -EINVAL; |
| |
| /* wp=1 means lun_access_ro=true */ |
| core_update_device_list_access(lacl->mapped_lun, wp, lacl->se_lun_nacl); |
| |
| pr_debug("%s_ConfigFS: Changed Initiator ACL: %s" |
| " Mapped LUN: %llu Write Protect bit to %s\n", |
| se_tpg->se_tpg_tfo->fabric_name, |
| se_nacl->initiatorname, lacl->mapped_lun, (wp) ? "ON" : "OFF"); |
| |
| return count; |
| |
| } |
| |
| CONFIGFS_ATTR(target_fabric_mappedlun_, write_protect); |
| |
| static struct configfs_attribute *target_fabric_mappedlun_attrs[] = { |
| &target_fabric_mappedlun_attr_write_protect, |
| NULL, |
| }; |
| |
| static void target_fabric_mappedlun_release(struct config_item *item) |
| { |
| struct se_lun_acl *lacl = container_of(to_config_group(item), |
| struct se_lun_acl, se_lun_group); |
| struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg; |
| |
| core_dev_free_initiator_node_lun_acl(se_tpg, lacl); |
| } |
| |
| static struct configfs_item_operations target_fabric_mappedlun_item_ops = { |
| .release = target_fabric_mappedlun_release, |
| .allow_link = target_fabric_mappedlun_link, |
| .drop_link = target_fabric_mappedlun_unlink, |
| }; |
| |
| TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL, |
| target_fabric_mappedlun_attrs); |
| |
| /* End of tfc_tpg_mappedlun_cit */ |
| |
| /* Start of tfc_tpg_mappedlun_port_cit */ |
| |
| static struct config_group *target_core_mappedlun_stat_mkdir( |
| struct config_group *group, |
| const char *name) |
| { |
| return ERR_PTR(-ENOSYS); |
| } |
| |
| static void target_core_mappedlun_stat_rmdir( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| return; |
| } |
| |
| static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = { |
| .make_group = target_core_mappedlun_stat_mkdir, |
| .drop_item = target_core_mappedlun_stat_rmdir, |
| }; |
| |
| TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops, |
| NULL); |
| |
| /* End of tfc_tpg_mappedlun_port_cit */ |
| |
| TF_CIT_SETUP_DRV(tpg_nacl_attrib, NULL, NULL); |
| TF_CIT_SETUP_DRV(tpg_nacl_auth, NULL, NULL); |
| TF_CIT_SETUP_DRV(tpg_nacl_param, NULL, NULL); |
| |
| /* Start of tfc_tpg_nacl_base_cit */ |
| |
| static struct config_group *target_fabric_make_mappedlun( |
| struct config_group *group, |
| const char *name) |
| { |
| struct se_node_acl *se_nacl = container_of(group, |
| struct se_node_acl, acl_group); |
| struct se_portal_group *se_tpg = se_nacl->se_tpg; |
| struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; |
| struct se_lun_acl *lacl = NULL; |
| char *buf; |
| unsigned long long mapped_lun; |
| int ret = 0; |
| |
| buf = kzalloc(strlen(name) + 1, GFP_KERNEL); |
| if (!buf) { |
| pr_err("Unable to allocate memory for name buf\n"); |
| return ERR_PTR(-ENOMEM); |
| } |
| snprintf(buf, strlen(name) + 1, "%s", name); |
| /* |
| * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID. |
| */ |
| if (strstr(buf, "lun_") != buf) { |
| pr_err("Unable to locate \"lun_\" from buf: %s" |
| " name: %s\n", buf, name); |
| ret = -EINVAL; |
| goto out; |
| } |
| /* |
| * Determine the Mapped LUN value. This is what the SCSI Initiator |
| * Port will actually see. |
| */ |
| ret = kstrtoull(buf + 4, 0, &mapped_lun); |
| if (ret) |
| goto out; |
| |
| lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl, |
| mapped_lun, &ret); |
| if (!lacl) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| config_group_init_type_name(&lacl->se_lun_group, name, |
| &tf->tf_tpg_mappedlun_cit); |
| |
| config_group_init_type_name(&lacl->ml_stat_grps.stat_group, |
| "statistics", &tf->tf_tpg_mappedlun_stat_cit); |
| configfs_add_default_group(&lacl->ml_stat_grps.stat_group, |
| &lacl->se_lun_group); |
| |
| target_stat_setup_mappedlun_default_groups(lacl); |
| |
| kfree(buf); |
| return &lacl->se_lun_group; |
| out: |
| kfree(lacl); |
| kfree(buf); |
| return ERR_PTR(ret); |
| } |
| |
| static void target_fabric_drop_mappedlun( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| struct se_lun_acl *lacl = container_of(to_config_group(item), |
| struct se_lun_acl, se_lun_group); |
| |
| configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group); |
| configfs_remove_default_groups(&lacl->se_lun_group); |
| |
| config_item_put(item); |
| } |
| |
| static void target_fabric_nacl_base_release(struct config_item *item) |
| { |
| struct se_node_acl *se_nacl = container_of(to_config_group(item), |
| struct se_node_acl, acl_group); |
| |
| configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group); |
| core_tpg_del_initiator_node_acl(se_nacl); |
| } |
| |
| static struct configfs_item_operations target_fabric_nacl_base_item_ops = { |
| .release = target_fabric_nacl_base_release, |
| }; |
| |
| static struct configfs_group_operations target_fabric_nacl_base_group_ops = { |
| .make_group = target_fabric_make_mappedlun, |
| .drop_item = target_fabric_drop_mappedlun, |
| }; |
| |
| TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops, |
| &target_fabric_nacl_base_group_ops); |
| |
| /* End of tfc_tpg_nacl_base_cit */ |
| |
| /* Start of tfc_node_fabric_stats_cit */ |
| /* |
| * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group |
| * to allow fabrics access to ->acl_fabric_stat_group->default_groups[] |
| */ |
| TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL); |
| |
| /* End of tfc_wwn_fabric_stats_cit */ |
| |
| /* Start of tfc_tpg_nacl_cit */ |
| |
| static struct config_group *target_fabric_make_nodeacl( |
| struct config_group *group, |
| const char *name) |
| { |
| struct se_portal_group *se_tpg = container_of(group, |
| struct se_portal_group, tpg_acl_group); |
| struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; |
| struct se_node_acl *se_nacl; |
| |
| se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name); |
| if (IS_ERR(se_nacl)) |
| return ERR_CAST(se_nacl); |
| |
| config_group_init_type_name(&se_nacl->acl_group, name, |
| &tf->tf_tpg_nacl_base_cit); |
| |
| config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib", |
| &tf->tf_tpg_nacl_attrib_cit); |
| configfs_add_default_group(&se_nacl->acl_attrib_group, |
| &se_nacl->acl_group); |
| |
| config_group_init_type_name(&se_nacl->acl_auth_group, "auth", |
| &tf->tf_tpg_nacl_auth_cit); |
| configfs_add_default_group(&se_nacl->acl_auth_group, |
| &se_nacl->acl_group); |
| |
| config_group_init_type_name(&se_nacl->acl_param_group, "param", |
| &tf->tf_tpg_nacl_param_cit); |
| configfs_add_default_group(&se_nacl->acl_param_group, |
| &se_nacl->acl_group); |
| |
| config_group_init_type_name(&se_nacl->acl_fabric_stat_group, |
| "fabric_statistics", &tf->tf_tpg_nacl_stat_cit); |
| configfs_add_default_group(&se_nacl->acl_fabric_stat_group, |
| &se_nacl->acl_group); |
| |
| if (tf->tf_ops->fabric_init_nodeacl) { |
| int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name); |
| if (ret) { |
| configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group); |
| core_tpg_del_initiator_node_acl(se_nacl); |
| return ERR_PTR(ret); |
| } |
| } |
| |
| return &se_nacl->acl_group; |
| } |
| |
| static void target_fabric_drop_nodeacl( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| struct se_node_acl *se_nacl = container_of(to_config_group(item), |
| struct se_node_acl, acl_group); |
| |
| configfs_remove_default_groups(&se_nacl->acl_group); |
| |
| /* |
| * struct se_node_acl free is done in target_fabric_nacl_base_release() |
| */ |
| config_item_put(item); |
| } |
| |
| static struct configfs_group_operations target_fabric_nacl_group_ops = { |
| .make_group = target_fabric_make_nodeacl, |
| .drop_item = target_fabric_drop_nodeacl, |
| }; |
| |
| TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL); |
| |
| /* End of tfc_tpg_nacl_cit */ |
| |
| /* Start of tfc_tpg_np_base_cit */ |
| |
| static void target_fabric_np_base_release(struct config_item *item) |
| { |
| struct se_tpg_np *se_tpg_np = container_of(to_config_group(item), |
| struct se_tpg_np, tpg_np_group); |
| struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent; |
| struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; |
| |
| tf->tf_ops->fabric_drop_np(se_tpg_np); |
| } |
| |
| static struct configfs_item_operations target_fabric_np_base_item_ops = { |
| .release = target_fabric_np_base_release, |
| }; |
| |
| TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL); |
| |
| /* End of tfc_tpg_np_base_cit */ |
| |
| /* Start of tfc_tpg_np_cit */ |
| |
| static struct config_group *target_fabric_make_np( |
| struct config_group *group, |
| const char *name) |
| { |
| struct se_portal_group *se_tpg = container_of(group, |
| struct se_portal_group, tpg_np_group); |
| struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; |
| struct se_tpg_np *se_tpg_np; |
| |
| if (!tf->tf_ops->fabric_make_np) { |
| pr_err("tf->tf_ops.fabric_make_np is NULL\n"); |
| return ERR_PTR(-ENOSYS); |
| } |
| |
| se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name); |
| if (!se_tpg_np || IS_ERR(se_tpg_np)) |
| return ERR_PTR(-EINVAL); |
| |
| se_tpg_np->tpg_np_parent = se_tpg; |
| config_group_init_type_name(&se_tpg_np->tpg_np_group, name, |
| &tf->tf_tpg_np_base_cit); |
| |
| return &se_tpg_np->tpg_np_group; |
| } |
| |
| static void target_fabric_drop_np( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| /* |
| * struct se_tpg_np is released via target_fabric_np_base_release() |
| */ |
| config_item_put(item); |
| } |
| |
| static struct configfs_group_operations target_fabric_np_group_ops = { |
| .make_group = &target_fabric_make_np, |
| .drop_item = &target_fabric_drop_np, |
| }; |
| |
| TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL); |
| |
| /* End of tfc_tpg_np_cit */ |
| |
| /* Start of tfc_tpg_port_cit */ |
| |
| static struct se_lun *item_to_lun(struct config_item *item) |
| { |
| return container_of(to_config_group(item), struct se_lun, |
| lun_group); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item, |
| char *page) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_show_tg_pt_gp_info(lun, page); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_store_tg_pt_gp_info(lun, page, count); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_offline_show( |
| struct config_item *item, char *page) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_show_offline_bit(lun, page); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_offline_store( |
| struct config_item *item, const char *page, size_t count) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_store_offline_bit(lun, page, count); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_status_show( |
| struct config_item *item, char *page) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_show_secondary_status(lun, page); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_status_store( |
| struct config_item *item, const char *page, size_t count) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_store_secondary_status(lun, page, count); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_write_md_show( |
| struct config_item *item, char *page) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_show_secondary_write_metadata(lun, page); |
| } |
| |
| static ssize_t target_fabric_port_alua_tg_pt_write_md_store( |
| struct config_item *item, const char *page, size_t count) |
| { |
| struct se_lun *lun = item_to_lun(item); |
| |
| if (!lun || !lun->lun_se_dev) |
| return -ENODEV; |
| |
| return core_alua_store_secondary_write_metadata(lun, page, count); |
| } |
| |
| CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp); |
| CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline); |
| CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status); |
| CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md); |
| |
| static struct configfs_attribute *target_fabric_port_attrs[] = { |
| &target_fabric_port_attr_alua_tg_pt_gp, |
| &target_fabric_port_attr_alua_tg_pt_offline, |
| &target_fabric_port_attr_alua_tg_pt_status, |
| &target_fabric_port_attr_alua_tg_pt_write_md, |
| NULL, |
| }; |
| |
| static int target_fabric_port_link( |
| struct config_item *lun_ci, |
| struct config_item *se_dev_ci) |
| { |
| struct config_item *tpg_ci; |
| struct se_lun *lun = container_of(to_config_group(lun_ci), |
| struct se_lun, lun_group); |
| struct se_portal_group *se_tpg; |
| struct se_device *dev; |
| struct target_fabric_configfs *tf; |
| int ret; |
| |
| if (!se_dev_ci->ci_type || |
| se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) { |
| pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci); |
| return -EFAULT; |
| } |
| dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group); |
| |
| if (!target_dev_configured(dev)) { |
| pr_err("se_device not configured yet, cannot port link\n"); |
| return -ENODEV; |
| } |
| |
| tpg_ci = &lun_ci->ci_parent->ci_group->cg_item; |
| se_tpg = container_of(to_config_group(tpg_ci), |
| struct se_portal_group, tpg_group); |
| tf = se_tpg->se_tpg_wwn->wwn_tf; |
| |
| if (lun->lun_se_dev != NULL) { |
| pr_err("Port Symlink already exists\n"); |
| return -EEXIST; |
| } |
| |
| ret = core_dev_add_lun(se_tpg, dev, lun); |
| if (ret) { |
| pr_err("core_dev_add_lun() failed: %d\n", ret); |
| goto out; |
| } |
| |
| if (tf->tf_ops->fabric_post_link) { |
| /* |
| * Call the optional fabric_post_link() to allow a |
| * fabric module to setup any additional state once |
| * core_dev_add_lun() has been called.. |
| */ |
| tf->tf_ops->fabric_post_link(se_tpg, lun); |
| } |
| |
| return 0; |
| out: |
| return ret; |
| } |
| |
| static void target_fabric_port_unlink( |
| struct config_item *lun_ci, |
| struct config_item *se_dev_ci) |
| { |
| struct se_lun *lun = container_of(to_config_group(lun_ci), |
| struct se_lun, lun_group); |
| struct se_portal_group *se_tpg = lun->lun_tpg; |
| struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; |
| |
| if (tf->tf_ops->fabric_pre_unlink) { |
| /* |
| * Call the optional fabric_pre_unlink() to allow a |
| * fabric module to release any additional stat before |
| * core_dev_del_lun() is called. |
| */ |
| tf->tf_ops->fabric_pre_unlink(se_tpg, lun); |
| } |
| |
| core_dev_del_lun(se_tpg, lun); |
| } |
| |
| static void target_fabric_port_release(struct config_item *item) |
| { |
| struct se_lun *lun = container_of(to_config_group(item), |
| struct se_lun, lun_group); |
| |
| kfree_rcu(lun, rcu_head); |
| } |
| |
| static struct configfs_item_operations target_fabric_port_item_ops = { |
| .release = target_fabric_port_release, |
| .allow_link = target_fabric_port_link, |
| .drop_link = target_fabric_port_unlink, |
| }; |
| |
| TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs); |
| |
| /* End of tfc_tpg_port_cit */ |
| |
| /* Start of tfc_tpg_port_stat_cit */ |
| |
| static struct config_group *target_core_port_stat_mkdir( |
| struct config_group *group, |
| const char *name) |
| { |
| return ERR_PTR(-ENOSYS); |
| } |
| |
| static void target_core_port_stat_rmdir( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| return; |
| } |
| |
| static struct configfs_group_operations target_fabric_port_stat_group_ops = { |
| .make_group = target_core_port_stat_mkdir, |
| .drop_item = target_core_port_stat_rmdir, |
| }; |
| |
| TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL); |
| |
| /* End of tfc_tpg_port_stat_cit */ |
| |
| /* Start of tfc_tpg_lun_cit */ |
| |
| static struct config_group *target_fabric_make_lun( |
| struct config_group *group, |
| const char *name) |
| { |
| struct se_lun *lun; |
| struct se_portal_group *se_tpg = container_of(group, |
| struct se_portal_group, tpg_lun_group); |
| struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; |
| unsigned long long unpacked_lun; |
| int errno; |
| |
| if (strstr(name, "lun_") != name) { |
| pr_err("Unable to locate \'_\" in" |
| " \"lun_$LUN_NUMBER\"\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| errno = kstrtoull(name + 4, 0, &unpacked_lun); |
| if (errno) |
| return ERR_PTR(errno); |
| |
| lun = core_tpg_alloc_lun(se_tpg, unpacked_lun); |
| if (IS_ERR(lun)) |
| return ERR_CAST(lun); |
| |
| config_group_init_type_name(&lun->lun_group, name, |
| &tf->tf_tpg_port_cit); |
| |
| config_group_init_type_name(&lun->port_stat_grps.stat_group, |
| "statistics", &tf->tf_tpg_port_stat_cit); |
| configfs_add_default_group(&lun->port_stat_grps.stat_group, |
| &lun->lun_group); |
| |
| target_stat_setup_port_default_groups(lun); |
| |
| return &lun->lun_group; |
| } |
| |
| static void target_fabric_drop_lun( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| struct se_lun *lun = container_of(to_config_group(item), |
| struct se_lun, lun_group); |
| |
| configfs_remove_default_groups(&lun->port_stat_grps.stat_group); |
| configfs_remove_default_groups(&lun->lun_group); |
| |
| config_item_put(item); |
| } |
| |
| static struct configfs_group_operations target_fabric_lun_group_ops = { |
| .make_group = &target_fabric_make_lun, |
| .drop_item = &target_fabric_drop_lun, |
| }; |
| |
| TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL); |
| |
| /* End of tfc_tpg_lun_cit */ |
| |
| TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL); |
| TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL); |
| TF_CIT_SETUP_DRV(tpg_param, NULL, NULL); |
| |
| /* Start of tfc_tpg_base_cit */ |
| |
| static void target_fabric_tpg_release(struct config_item *item) |
| { |
| struct se_portal_group *se_tpg = container_of(to_config_group(item), |
| struct se_portal_group, tpg_group); |
| struct se_wwn *wwn = se_tpg->se_tpg_wwn; |
| struct target_fabric_configfs *tf = wwn->wwn_tf; |
| |
| tf->tf_ops->fabric_drop_tpg(se_tpg); |
| } |
| |
| static struct configfs_item_operations target_fabric_tpg_base_item_ops = { |
| .release = target_fabric_tpg_release, |
| }; |
| |
| static ssize_t target_fabric_tpg_base_enable_show(struct config_item *item, |
| char *page) |
| { |
| return sysfs_emit(page, "%d\n", to_tpg(item)->enabled); |
| } |
| |
| static ssize_t target_fabric_tpg_base_enable_store(struct config_item *item, |
| const char *page, |
| size_t count) |
| { |
| struct se_portal_group *se_tpg = to_tpg(item); |
| int ret; |
| bool op; |
| |
| ret = strtobool(page, &op); |
| if (ret) |
| return ret; |
| |
| if (se_tpg->enabled == op) |
| return count; |
| |
| ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, op); |
| if (ret) |
| return ret; |
| |
| se_tpg->enabled = op; |
| |
| return count; |
| } |
| |
| CONFIGFS_ATTR(target_fabric_tpg_base_, enable); |
| |
| static int |
| target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf) |
| { |
| struct config_item_type *cit = &tf->tf_tpg_base_cit; |
| struct configfs_attribute **attrs = NULL; |
| size_t nr_attrs = 0; |
| int i = 0; |
| |
| if (tf->tf_ops->tfc_tpg_base_attrs) |
| while (tf->tf_ops->tfc_tpg_base_attrs[nr_attrs] != NULL) |
| nr_attrs++; |
| |
| if (tf->tf_ops->fabric_enable_tpg) |
| nr_attrs++; |
| |
| if (nr_attrs == 0) |
| goto done; |
| |
| /* + 1 for final NULL in the array */ |
| attrs = kcalloc(nr_attrs + 1, sizeof(*attrs), GFP_KERNEL); |
| if (!attrs) |
| return -ENOMEM; |
| |
| if (tf->tf_ops->tfc_tpg_base_attrs) |
| for (; tf->tf_ops->tfc_tpg_base_attrs[i] != NULL; i++) |
| attrs[i] = tf->tf_ops->tfc_tpg_base_attrs[i]; |
| |
| if (tf->tf_ops->fabric_enable_tpg) |
| attrs[i] = &target_fabric_tpg_base_attr_enable; |
| |
| done: |
| cit->ct_item_ops = &target_fabric_tpg_base_item_ops; |
| cit->ct_attrs = attrs; |
| cit->ct_owner = tf->tf_ops->module; |
| pr_debug("Setup generic tpg_base\n"); |
| |
| return 0; |
| } |
| /* End of tfc_tpg_base_cit */ |
| |
| /* Start of tfc_tpg_cit */ |
| |
| static struct config_group *target_fabric_make_tpg( |
| struct config_group *group, |
| const char *name) |
| { |
| struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group); |
| struct target_fabric_configfs *tf = wwn->wwn_tf; |
| struct se_portal_group *se_tpg; |
| |
| if (!tf->tf_ops->fabric_make_tpg) { |
| pr_err("tf->tf_ops->fabric_make_tpg is NULL\n"); |
| return ERR_PTR(-ENOSYS); |
| } |
| |
| se_tpg = tf->tf_ops->fabric_make_tpg(wwn, name); |
| if (!se_tpg || IS_ERR(se_tpg)) |
| return ERR_PTR(-EINVAL); |
| |
| config_group_init_type_name(&se_tpg->tpg_group, name, |
| &tf->tf_tpg_base_cit); |
| |
| config_group_init_type_name(&se_tpg->tpg_lun_group, "lun", |
| &tf->tf_tpg_lun_cit); |
| configfs_add_default_group(&se_tpg->tpg_lun_group, |
| &se_tpg->tpg_group); |
| |
| config_group_init_type_name(&se_tpg->tpg_np_group, "np", |
| &tf->tf_tpg_np_cit); |
| configfs_add_default_group(&se_tpg->tpg_np_group, |
| &se_tpg->tpg_group); |
| |
| config_group_init_type_name(&se_tpg->tpg_acl_group, "acls", |
| &tf->tf_tpg_nacl_cit); |
| configfs_add_default_group(&se_tpg->tpg_acl_group, |
| &se_tpg->tpg_group); |
| |
| config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib", |
| &tf->tf_tpg_attrib_cit); |
| configfs_add_default_group(&se_tpg->tpg_attrib_group, |
| &se_tpg->tpg_group); |
| |
| config_group_init_type_name(&se_tpg->tpg_auth_group, "auth", |
| &tf->tf_tpg_auth_cit); |
| configfs_add_default_group(&se_tpg->tpg_auth_group, |
| &se_tpg->tpg_group); |
| |
| config_group_init_type_name(&se_tpg->tpg_param_group, "param", |
| &tf->tf_tpg_param_cit); |
| configfs_add_default_group(&se_tpg->tpg_param_group, |
| &se_tpg->tpg_group); |
| |
| return &se_tpg->tpg_group; |
| } |
| |
| static void target_fabric_drop_tpg( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| struct se_portal_group *se_tpg = container_of(to_config_group(item), |
| struct se_portal_group, tpg_group); |
| |
| configfs_remove_default_groups(&se_tpg->tpg_group); |
| config_item_put(item); |
| } |
| |
| static void target_fabric_release_wwn(struct config_item *item) |
| { |
| struct se_wwn *wwn = container_of(to_config_group(item), |
| struct se_wwn, wwn_group); |
| struct target_fabric_configfs *tf = wwn->wwn_tf; |
| |
| configfs_remove_default_groups(&wwn->fabric_stat_group); |
| configfs_remove_default_groups(&wwn->param_group); |
| tf->tf_ops->fabric_drop_wwn(wwn); |
| } |
| |
| static struct configfs_item_operations target_fabric_tpg_item_ops = { |
| .release = target_fabric_release_wwn, |
| }; |
| |
| static struct configfs_group_operations target_fabric_tpg_group_ops = { |
| .make_group = target_fabric_make_tpg, |
| .drop_item = target_fabric_drop_tpg, |
| }; |
| |
| TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops, |
| NULL); |
| |
| /* End of tfc_tpg_cit */ |
| |
| /* Start of tfc_wwn_fabric_stats_cit */ |
| /* |
| * This is used as a placeholder for struct se_wwn->fabric_stat_group |
| * to allow fabrics access to ->fabric_stat_group->default_groups[] |
| */ |
| TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL); |
| |
| /* End of tfc_wwn_fabric_stats_cit */ |
| |
| static ssize_t |
| target_fabric_wwn_cmd_completion_affinity_show(struct config_item *item, |
| char *page) |
| { |
| struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn, |
| param_group); |
| return sprintf(page, "%d\n", |
| wwn->cmd_compl_affinity == WORK_CPU_UNBOUND ? |
| SE_COMPL_AFFINITY_CURR_CPU : wwn->cmd_compl_affinity); |
| } |
| |
| static ssize_t |
| target_fabric_wwn_cmd_completion_affinity_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn, |
| param_group); |
| int compl_val; |
| |
| if (kstrtoint(page, 0, &compl_val)) |
| return -EINVAL; |
| |
| switch (compl_val) { |
| case SE_COMPL_AFFINITY_CPUID: |
| wwn->cmd_compl_affinity = compl_val; |
| break; |
| case SE_COMPL_AFFINITY_CURR_CPU: |
| wwn->cmd_compl_affinity = WORK_CPU_UNBOUND; |
| break; |
| default: |
| if (compl_val < 0 || compl_val >= nr_cpu_ids || |
| !cpu_online(compl_val)) { |
| pr_err("Command completion value must be between %d and %d or an online CPU.\n", |
| SE_COMPL_AFFINITY_CPUID, |
| SE_COMPL_AFFINITY_CURR_CPU); |
| return -EINVAL; |
| } |
| wwn->cmd_compl_affinity = compl_val; |
| } |
| |
| return count; |
| } |
| CONFIGFS_ATTR(target_fabric_wwn_, cmd_completion_affinity); |
| |
| static struct configfs_attribute *target_fabric_wwn_param_attrs[] = { |
| &target_fabric_wwn_attr_cmd_completion_affinity, |
| NULL, |
| }; |
| |
| TF_CIT_SETUP(wwn_param, NULL, NULL, target_fabric_wwn_param_attrs); |
| |
| /* Start of tfc_wwn_cit */ |
| |
| static struct config_group *target_fabric_make_wwn( |
| struct config_group *group, |
| const char *name) |
| { |
| struct target_fabric_configfs *tf = container_of(group, |
| struct target_fabric_configfs, tf_group); |
| struct se_wwn *wwn; |
| |
| if (!tf->tf_ops->fabric_make_wwn) { |
| pr_err("tf->tf_ops.fabric_make_wwn is NULL\n"); |
| return ERR_PTR(-ENOSYS); |
| } |
| |
| wwn = tf->tf_ops->fabric_make_wwn(tf, group, name); |
| if (!wwn || IS_ERR(wwn)) |
| return ERR_PTR(-EINVAL); |
| |
| wwn->cmd_compl_affinity = SE_COMPL_AFFINITY_CPUID; |
| wwn->wwn_tf = tf; |
| |
| config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit); |
| |
| config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics", |
| &tf->tf_wwn_fabric_stats_cit); |
| configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group); |
| |
| config_group_init_type_name(&wwn->param_group, "param", |
| &tf->tf_wwn_param_cit); |
| configfs_add_default_group(&wwn->param_group, &wwn->wwn_group); |
| |
| if (tf->tf_ops->add_wwn_groups) |
| tf->tf_ops->add_wwn_groups(wwn); |
| return &wwn->wwn_group; |
| } |
| |
| static void target_fabric_drop_wwn( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| struct se_wwn *wwn = container_of(to_config_group(item), |
| struct se_wwn, wwn_group); |
| |
| configfs_remove_default_groups(&wwn->wwn_group); |
| config_item_put(item); |
| } |
| |
| static struct configfs_group_operations target_fabric_wwn_group_ops = { |
| .make_group = target_fabric_make_wwn, |
| .drop_item = target_fabric_drop_wwn, |
| }; |
| |
| TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops); |
| TF_CIT_SETUP_DRV(discovery, NULL, NULL); |
| |
| int target_fabric_setup_cits(struct target_fabric_configfs *tf) |
| { |
| int ret; |
| |
| target_fabric_setup_discovery_cit(tf); |
| target_fabric_setup_wwn_cit(tf); |
| target_fabric_setup_wwn_fabric_stats_cit(tf); |
| target_fabric_setup_wwn_param_cit(tf); |
| target_fabric_setup_tpg_cit(tf); |
| |
| ret = target_fabric_setup_tpg_base_cit(tf); |
| if (ret) |
| return ret; |
| |
| target_fabric_setup_tpg_port_cit(tf); |
| target_fabric_setup_tpg_port_stat_cit(tf); |
| target_fabric_setup_tpg_lun_cit(tf); |
| target_fabric_setup_tpg_np_cit(tf); |
| target_fabric_setup_tpg_np_base_cit(tf); |
| target_fabric_setup_tpg_attrib_cit(tf); |
| target_fabric_setup_tpg_auth_cit(tf); |
| target_fabric_setup_tpg_param_cit(tf); |
| target_fabric_setup_tpg_nacl_cit(tf); |
| target_fabric_setup_tpg_nacl_base_cit(tf); |
| target_fabric_setup_tpg_nacl_attrib_cit(tf); |
| target_fabric_setup_tpg_nacl_auth_cit(tf); |
| target_fabric_setup_tpg_nacl_param_cit(tf); |
| target_fabric_setup_tpg_nacl_stat_cit(tf); |
| target_fabric_setup_tpg_mappedlun_cit(tf); |
| target_fabric_setup_tpg_mappedlun_stat_cit(tf); |
| |
| return 0; |
| } |