diff options
Diffstat (limited to 'drivers/target/target_core_fabric_configfs.c')
| -rw-r--r-- | drivers/target/target_core_fabric_configfs.c | 996 |
1 files changed, 996 insertions, 0 deletions
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c new file mode 100644 index 000000000000..32b148d7e261 --- /dev/null +++ b/drivers/target/target_core_fabric_configfs.c @@ -0,0 +1,996 @@ +/******************************************************************************* +* Filename: target_core_fabric_configfs.c + * + * This file contains generic fabric module configfs infrastructure for + * TCM v4.x code + * + * Copyright (c) 2010 Rising Tide Systems + * Copyright (c) 2010 Linux-iSCSI.org + * + * Copyright (c) 2010 Nicholas A. Bellinger <nab@linux-iscsi.org> +* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + ****************************************************************************/ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/version.h> +#include <generated/utsrelease.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_device.h> +#include <target/target_core_tpg.h> +#include <target/target_core_transport.h> +#include <target/target_core_fabric_ops.h> +#include <target/target_core_fabric_configfs.h> +#include <target/target_core_configfs.h> +#include <target/configfs_macros.h> + +#include "target_core_alua.h" +#include "target_core_hba.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 target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \ + struct config_item_type *cit = &tfc->tfc_##_name##_cit; \ + \ + cit->ct_item_ops = _item_ops; \ + cit->ct_group_ops = _group_ops; \ + cit->ct_attrs = _attrs; \ + cit->ct_owner = tf->tf_module; \ + printk("Setup generic %s\n", __stringify(_name)); \ +} + +/* 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 = container_of(to_config_group(lun_ci), + struct se_lun, lun_group); + 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; + int ret = 0, lun_access; + /* + * Ensure that the source port exists + */ + if (!(lun->lun_sep) || !(lun->lun_sep->sep_tpg)) { + printk(KERN_ERR "Source se_lun->lun_sep or lun->lun_sep->sep" + "_tpg does not exist\n"); + return -EINVAL; + } + se_tpg = lun->lun_sep->sep_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_$TPGT + */ + if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) { + printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n", + config_item_name(wwn_ci)); + return -EINVAL; + } + if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) { + printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s" + " TPGT: %s\n", config_item_name(wwn_ci), + config_item_name(tpg_ci)); + return -EINVAL; + } + /* + * If this struct se_node_acl was dynamically generated with + * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags, + * which be will write protected (READ-ONLY) when + * tpg_1/attrib/demo_mode_write_protect=1 + */ + spin_lock_irq(&lacl->se_lun_nacl->device_list_lock); + deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun]; + if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) + lun_access = deve->lun_flags; + else + lun_access = + (TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect( + se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY : + TRANSPORT_LUNFLAGS_READ_WRITE; + spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock); + /* + * Determine the actual mapped LUN value user wants.. + * + * This value is what the SCSI Initiator actually sees the + * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports. + */ + ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl, + lun->unpacked_lun, lun_access); + + return (ret < 0) ? -EINVAL : 0; +} + +static int target_fabric_mappedlun_unlink( + struct config_item *lun_acl_ci, + struct config_item *lun_ci) +{ + 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_node_acl *nacl = lacl->se_lun_nacl; + struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun]; + struct se_portal_group *se_tpg; + /* + * Determine if the underlying MappedLUN has already been released.. + */ + if (!(deve->se_lun)) + return 0; + + lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group); + se_tpg = lun->lun_sep->sep_tpg; + + core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl); + return 0; +} + +CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl); +#define TCM_MAPPEDLUN_ATTR(_name, _mode) \ +static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \ + __CONFIGFS_EATTR(_name, _mode, \ + target_fabric_mappedlun_show_##_name, \ + target_fabric_mappedlun_store_##_name); + +static ssize_t target_fabric_mappedlun_show_write_protect( + struct se_lun_acl *lacl, + char *page) +{ + struct se_node_acl *se_nacl = lacl->se_lun_nacl; + struct se_dev_entry *deve; + ssize_t len; + + spin_lock_irq(&se_nacl->device_list_lock); + deve = &se_nacl->device_list[lacl->mapped_lun]; + len = sprintf(page, "%d\n", + (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ? + 1 : 0); + spin_unlock_irq(&se_nacl->device_list_lock); + + return len; +} + +static ssize_t target_fabric_mappedlun_store_write_protect( + struct se_lun_acl *lacl, + const char *page, + size_t count) +{ + struct se_node_acl *se_nacl = lacl->se_lun_nacl; + struct se_portal_group *se_tpg = se_nacl->se_tpg; + unsigned long op; + + if (strict_strtoul(page, 0, &op)) + return -EINVAL; + + if ((op != 1) && (op != 0)) + return -EINVAL; + + core_update_device_list_access(lacl->mapped_lun, (op) ? + TRANSPORT_LUNFLAGS_READ_ONLY : + TRANSPORT_LUNFLAGS_READ_WRITE, + lacl->se_lun_nacl); + + printk(KERN_INFO "%s_ConfigFS: Changed Initiator ACL: %s" + " Mapped LUN: %u Write Protect bit to %s\n", + TPG_TFO(se_tpg)->get_fabric_name(), + lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF"); + + return count; + +} + +TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR); + +CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group); + +static struct configfs_attribute *target_fabric_mappedlun_attrs[] = { + &target_fabric_mappedlun_write_protect.attr, + NULL, +}; + +static struct configfs_item_operations target_fabric_mappedlun_item_ops = { + .show_attribute = target_fabric_mappedlun_attr_show, + .store_attribute = target_fabric_mappedlun_attr_store, + .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_nacl_attrib_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group); + +static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = { + .show_attribute = target_fabric_nacl_attrib_attr_show, + .store_attribute = target_fabric_nacl_attrib_attr_store, +}; + +TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL); + +/* End of tfc_tpg_nacl_attrib_cit */ + +/* Start of tfc_tpg_nacl_auth_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group); + +static struct configfs_item_operations target_fabric_nacl_auth_item_ops = { + .show_attribute = target_fabric_nacl_auth_attr_show, + .store_attribute = target_fabric_nacl_auth_attr_store, +}; + +TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL); + +/* End of tfc_tpg_nacl_auth_cit */ + +/* Start of tfc_tpg_nacl_param_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group); + +static struct configfs_item_operations target_fabric_nacl_param_item_ops = { + .show_attribute = target_fabric_nacl_param_attr_show, + .store_attribute = target_fabric_nacl_param_attr_store, +}; + +TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL); + +/* End of tfc_tpg_nacl_param_cit */ + +/* Start of tfc_tpg_nacl_base_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group); + +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; + struct config_item *acl_ci; + char *buf; + unsigned long mapped_lun; + int ret = 0; + + acl_ci = &group->cg_item; + if (!(acl_ci)) { + printk(KERN_ERR "Unable to locatel acl_ci\n"); + return NULL; + } + + buf = kzalloc(strlen(name) + 1, GFP_KERNEL); + if (!(buf)) { + printk(KERN_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) { + printk(KERN_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. + */ + if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) { + ret = -EINVAL; + goto out; + } + + lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun, + config_item_name(acl_ci), &ret); + if (!(lacl)) + goto out; + + config_group_init_type_name(&lacl->se_lun_group, name, + &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit); + + kfree(buf); + return &lacl->se_lun_group; +out: + 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); + struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg; + + config_item_put(item); + core_dev_free_initiator_node_lun_acl(se_tpg, lacl); +} + +static struct configfs_item_operations target_fabric_nacl_base_item_ops = { + .show_attribute = target_fabric_nacl_base_attr_show, + .store_attribute = target_fabric_nacl_base_attr_store, +}; + +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(tpg_nacl_base, &target_fabric_nacl_base_item_ops, + &target_fabric_nacl_base_group_ops, NULL); + +/* End of tfc_tpg_nacl_base_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; + struct config_group *nacl_cg; + + if (!(tf->tf_ops.fabric_make_nodeacl)) { + printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n"); + return ERR_PTR(-ENOSYS); + } + + se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name); + if (IS_ERR(se_nacl)) + return ERR_PTR(PTR_ERR(se_nacl)); + + nacl_cg = &se_nacl->acl_group; + nacl_cg->default_groups = se_nacl->acl_default_groups; + nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group; + nacl_cg->default_groups[1] = &se_nacl->acl_auth_group; + nacl_cg->default_groups[2] = &se_nacl->acl_param_group; + nacl_cg->default_groups[3] = NULL; + + config_group_init_type_name(&se_nacl->acl_group, name, + &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit); + config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib", + &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit); + config_group_init_type_name(&se_nacl->acl_auth_group, "auth", + &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit); + config_group_init_type_name(&se_nacl->acl_param_group, "param", + &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit); + + return &se_nacl->acl_group; +} + +static void target_fabric_drop_nodeacl( + struct config_group *group, + struct config_item *item) +{ + 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 = container_of(to_config_group(item), + struct se_node_acl, acl_group); + struct config_item *df_item; + struct config_group *nacl_cg; + int i; + + nacl_cg = &se_nacl->acl_group; + for (i = 0; nacl_cg->default_groups[i]; i++) { + df_item = &nacl_cg->default_groups[i]->cg_item; + nacl_cg->default_groups[i] = NULL; + config_item_put(df_item); + } + + config_item_put(item); + tf->tf_ops.fabric_drop_nodeacl(se_nacl); +} + +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 */ + +CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group); + +static struct configfs_item_operations target_fabric_np_base_item_ops = { + .show_attribute = target_fabric_np_base_attr_show, + .store_attribute = target_fabric_np_base_attr_store, +}; + +TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, 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)) { + printk(KERN_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); + + config_group_init_type_name(&se_tpg_np->tpg_np_group, name, + &TF_CIT_TMPL(tf)->tfc_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_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 = container_of(to_config_group(item), + struct se_tpg_np, tpg_np_group); + + config_item_put(item); + tf->tf_ops.fabric_drop_np(se_tpg_np); +} + +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 */ + +CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun); +#define TCM_PORT_ATTR(_name, _mode) \ +static struct target_fabric_port_attribute target_fabric_port_##_name = \ + __CONFIGFS_EATTR(_name, _mode, \ + target_fabric_port_show_attr_##_name, \ + target_fabric_port_store_attr_##_name); + +#define TCM_PORT_ATTOR_RO(_name) \ + __CONFIGFS_EATTR_RO(_name, \ + target_fabric_port_show_attr_##_name); + +/* + * alua_tg_pt_gp + */ +static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp( + struct se_lun *lun, + char *page) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_show_tg_pt_gp_info(lun->lun_sep, page); +} + +static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp( + struct se_lun *lun, + const char *page, + size_t count) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count); +} + +TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR); + +/* + * alua_tg_pt_offline + */ +static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline( + struct se_lun *lun, + char *page) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_show_offline_bit(lun, page); +} + +static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline( + struct se_lun *lun, + const char *page, + size_t count) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_store_offline_bit(lun, page, count); +} + +TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR); + +/* + * alua_tg_pt_status + */ +static ssize_t target_fabric_port_show_attr_alua_tg_pt_status( + struct se_lun *lun, + char *page) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_show_secondary_status(lun, page); +} + +static ssize_t target_fabric_port_store_attr_alua_tg_pt_status( + struct se_lun *lun, + const char *page, + size_t count) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_store_secondary_status(lun, page, count); +} + +TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR); + +/* + * alua_tg_pt_write_md + */ +static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md( + struct se_lun *lun, + char *page) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_show_secondary_write_metadata(lun, page); +} + +static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md( + struct se_lun *lun, + const char *page, + size_t count) +{ + if (!(lun)) + return -ENODEV; + + if (!(lun->lun_sep)) + return -ENODEV; + + return core_alua_store_secondary_write_metadata(lun, page, count); +} + +TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR); + + +static struct configfs_attribute *target_fabric_port_attrs[] = { + &target_fabric_port_alua_tg_pt_gp.attr, + &target_fabric_port_alua_tg_pt_offline.attr, + &target_fabric_port_alua_tg_pt_status.attr, + &target_fabric_port_alua_tg_pt_write_md.attr, + NULL, +}; + +CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group); + +static int target_fabric_port_link( + struct config_item *lun_ci, + struct config_item *se_dev_ci) +{ + struct config_item *tpg_ci; + struct se_device *dev; + struct se_lun *lun = container_of(to_config_group(lun_ci), + struct se_lun, lun_group); + struct se_lun *lun_p; + struct se_portal_group *se_tpg; + struct se_subsystem_dev *se_dev = container_of( + to_config_group(se_dev_ci), struct se_subsystem_dev, + se_dev_group); + struct target_fabric_configfs *tf; + int ret; + + 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) { + printk(KERN_ERR "Port Symlink already exists\n"); + return -EEXIST; + } + + dev = se_dev->se_dev_ptr; + if (!(dev)) { + printk(KERN_ERR "Unable to locate struct se_device pointer from" + " %s\n", config_item_name(se_dev_ci)); + ret = -ENODEV; + goto out; + } + + lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev, + lun->unpacked_lun); + if ((IS_ERR(lun_p)) || !(lun_p)) { + printk(KERN_ERR "core_dev_add_lun() failed\n"); + ret = -EINVAL; + 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 int 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_sep->sep_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->unpacked_lun); + return 0; +} + +static struct configfs_item_operations target_fabric_port_item_ops = { + .show_attribute = target_fabric_port_attr_show, + .store_attribute = target_fabric_port_attr_store, + .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_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 unpacked_lun; + + if (strstr(name, "lun_") != name) { + printk(KERN_ERR "Unable to locate \'_\" in" + " \"lun_$LUN_NUMBER\"\n"); + return ERR_PTR(-EINVAL); + } + if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX) + return ERR_PTR(-EINVAL); + + lun = core_get_lun_from_tpg(se_tpg, unpacked_lun); + if (!(lun)) + return ERR_PTR(-EINVAL); + + config_group_init_type_name(&lun->lun_group, name, + &TF_CIT_TMPL(tf)->tfc_tpg_port_cit); + + return &lun->lun_group; +} + +static void target_fabric_drop_lun( + struct config_group *group, + struct config_item *item) +{ + 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 */ + +/* Start of tfc_tpg_attrib_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group); + +static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = { + .show_attribute = target_fabric_tpg_attrib_attr_show, + .store_attribute = target_fabric_tpg_attrib_attr_store, +}; + +TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL); + +/* End of tfc_tpg_attrib_cit */ + +/* Start of tfc_tpg_param_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group); + +static struct configfs_item_operations target_fabric_tpg_param_item_ops = { + .show_attribute = target_fabric_tpg_param_attr_show, + .store_attribute = target_fabric_tpg_param_attr_store, +}; + +TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL); + +/* End of tfc_tpg_param_cit */ + +/* Start of tfc_tpg_base_cit */ +/* + * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO() + */ +CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group); + +static struct configfs_item_operations target_fabric_tpg_base_item_ops = { + .show_attribute = target_fabric_tpg_attr_show, + .store_attribute = target_fabric_tpg_attr_store, +}; + +TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL); + +/* 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)) { + printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n"); + return ERR_PTR(-ENOSYS); + } + + se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name); + if (!(se_tpg) || IS_ERR(se_tpg)) + return ERR_PTR(-EINVAL); + /* + * Setup default groups from pre-allocated se_tpg->tpg_default_groups + */ + se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups; + se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group; + se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group; + se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group; + se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group; + se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group; + se_tpg->tpg_group.default_groups[5] = NULL; + + config_group_init_type_name(&se_tpg->tpg_group, name, + &TF_CIT_TMPL(tf)->tfc_tpg_base_cit); + config_group_init_type_name(&se_tpg->tpg_lun_group, "lun", + &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit); + config_group_init_type_name(&se_tpg->tpg_np_group, "np", + &TF_CIT_TMPL(tf)->tfc_tpg_np_cit); + config_group_init_type_name(&se_tpg->tpg_acl_group, "acls", + &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit); + config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib", + &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit); + config_group_init_type_name(&se_tpg->tpg_param_group, "param", + &TF_CIT_TMPL(tf)->tfc_tpg_param_cit); + + return &se_tpg->tpg_group; +} + +static void target_fabric_drop_tpg( + struct config_group *group, + struct config_item *item) +{ + 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 = container_of(to_config_group(item), + struct se_portal_group, tpg_group); + struct config_group *tpg_cg = &se_tpg->tpg_group; + struct config_item *df_item; + int i; + /* + * Release default groups, but do not release tpg_cg->default_groups + * memory as it is statically allocated at se_tpg->tpg_default_groups. + */ + for (i = 0; tpg_cg->default_groups[i]; i++) { + df_item = &tpg_cg->default_groups[i]->cg_item; + tpg_cg->default_groups[i] = NULL; + config_item_put(df_item); + } + + config_item_put(item); + tf->tf_ops.fabric_drop_tpg(se_tpg); +} + +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, NULL, &target_fabric_tpg_group_ops, NULL); + +/* End of tfc_tpg_cit */ + +/* 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)) { + printk(KERN_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->wwn_tf = tf; + config_group_init_type_name(&wwn->wwn_group, name, + &TF_CIT_TMPL(tf)->tfc_tpg_cit); + + return &wwn->wwn_group; +} + +static void target_fabric_drop_wwn( + struct config_group *group, + struct config_item *item) +{ + struct target_fabric_configfs *tf = container_of(group, + struct target_fabric_configfs, tf_group); + struct se_wwn *wwn = container_of(to_config_group(item), + struct se_wwn, wwn_group); + + config_item_put(item); + tf->tf_ops.fabric_drop_wwn(wwn); +} + +static struct configfs_group_operations target_fabric_wwn_group_ops = { + .make_group = target_fabric_make_wwn, + .drop_item = target_fabric_drop_wwn, +}; +/* + * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO() + */ +CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group); + +static struct configfs_item_operations target_fabric_wwn_item_ops = { + .show_attribute = target_fabric_wwn_attr_show, + .store_attribute = target_fabric_wwn_attr_store, +}; + +TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL); + +/* End of tfc_wwn_cit */ + +/* Start of tfc_discovery_cit */ + +CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs, + tf_disc_group); + +static struct configfs_item_operations target_fabric_discovery_item_ops = { + .show_attribute = target_fabric_discovery_attr_show, + .store_attribute = target_fabric_discovery_attr_store, +}; + +TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL); + +/* End of tfc_discovery_cit */ + +int target_fabric_setup_cits(struct target_fabric_configfs *tf) +{ + target_fabric_setup_discovery_cit(tf); + target_fabric_setup_wwn_cit(tf); + target_fabric_setup_tpg_cit(tf); + target_fabric_setup_tpg_base_cit(tf); + target_fabric_setup_tpg_port_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_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_mappedlun_cit(tf); + + return 0; +} |