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Message-Id: <1283160177-6924-1-git-send-email-nab@linux-iscsi.org>
Date: Mon, 30 Aug 2010 02:22:57 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: linux-scsi <linux-scsi@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Cc: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
James Bottomley <James.Bottomley@...e.de>,
Jens Axboe <axboe@...nel.dk>,
Boaz Harrosh <bharrosh@...asas.com>,
Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [RFC 19/22] tcm: Add generic fabric independent ConfigFS infrastructure
From: Nicholas Bellinger <nab@...ux-iscsi.org>
This patch adds the v4 fabric independent configfs code that allows modules
to use a generic set of struct config_item_types and struct config_groups hanging
off fabric dependent structures, without having to explictly define a configfs layout
of /sys/kernel/config/target/$FABRIC themselves. This allows a generic layout to be
used with fabric dependent attributes using struct config_item_type context specific
macros in include/target/target_core_fabric_configfs.h.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/target/target_core_fabric_configfs.c | 979 ++++++++++++++++++++++++++
include/target/target_core_fabric_configfs.h | 106 +++
2 files changed, 1085 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_fabric_configfs.c
create mode 100644 include/target/target_core_fabric_configfs.h
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c
new file mode 100644
index 0000000..e1a64eb
--- /dev/null
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -0,0 +1,979 @@
+/*******************************************************************************
+* 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@...ux-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_$TPGT
+ */
+ if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
+ printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n",
+ config_item_name(wwn_ci));
+ return -EINVAL;
+ }
+ if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
+ printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s"
+ " TPGT: %s\n", config_item_name(wwn_ci),
+ config_item_name(tpg_ci));
+ return -EINVAL;
+ }
+ /*
+ * If this struct se_node_acl was dynamically generated with
+ * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
+ * which be will write protected (READ-ONLY) when
+ * tpg_1/attrib/demo_mode_write_protect=1
+ */
+ spin_lock_bh(&lacl->se_lun_nacl->device_list_lock);
+ deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
+ lun_access = deve->lun_flags;
+ else
+ lun_access =
+ (TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect(
+ se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
+ TRANSPORT_LUNFLAGS_READ_WRITE;
+ spin_unlock_bh(&lacl->se_lun_nacl->device_list_lock);
+ /*
+ * Determine the actual mapped LUN value user wants..
+ *
+ * This value is what the SCSI Initiator actually sees the
+ * iscsi/$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 = 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 = 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_bh(&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_bh(&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;
+ char *endptr;
+ u32 op;
+
+ op = simple_strtoul(page, &endptr, 0);
+ if ((op != 1) && (op != 0)) {
+ printk(KERN_ERR "Illegal value for access: %u\n", op);
+ 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, *endptr, *ptr;
+ u32 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.
+ */
+ ptr = strstr(buf, "lun_");
+ if (!(ptr)) {
+ printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
+ " name: %s\n", buf, name);
+ ret = -EINVAL;
+ goto out;
+ }
+ ptr += 3; /* Skip to "_" */
+ *ptr = '\0'; /* Terminate the string */
+ ptr++; /* Advance pointer to next characater */
+
+ /*
+ * Determine the Mapped LUN value. This is what the SCSI Initiator
+ * Port will actually see.
+ */
+ mapped_lun = simple_strtoul(ptr, &endptr, 0);
+
+ 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->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->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->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->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->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->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->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->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_check_link(
+ 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);
+
+ return atomic_read(&lun->lun_acl_count) ? -EPERM : 0;
+}
+
+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,
+ .check_link = target_fabric_port_check_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;
+
+ char *str, *endptr;
+ u32 unpacked_lun;
+
+ str = strstr(name, "_");
+ if (!(str)) {
+ printk(KERN_ERR "Unable to locate \'_\" in"
+ " \"lun_$LUN_NUMBER\"\n");
+ return NULL;
+ }
+ str++; /* Advance over _ delim.. */
+ unpacked_lun = simple_strtoul(str, &endptr, 0);
+
+ 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;
+}
diff --git a/include/target/target_core_fabric_configfs.h b/include/target/target_core_fabric_configfs.h
new file mode 100644
index 0000000..e48eb7d
--- /dev/null
+++ b/include/target/target_core_fabric_configfs.h
@@ -0,0 +1,106 @@
+/*
+ * Used for tfc_wwn_cit attributes
+ */
+
+#include <target/configfs_macros.h>
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_attrib, se_node_acl);
+#define TF_NACL_ATTRIB_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_attrib_attribute _fabric##_nacl_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_attrib_show_##_name, \
+ _fabric##_nacl_attrib_store_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_auth, se_node_acl);
+#define TF_NACL_AUTH_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_auth_attribute _fabric##_nacl_auth_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_auth_show_##_name, \
+ _fabric##_nacl_auth_store_##_name);
+
+#define TF_NACL_AUTH_ATTR_RO(_fabric, _name) \
+static struct target_fabric_nacl_auth_attribute _fabric##_nacl_auth_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_nacl_auth_show_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_param, se_node_acl);
+#define TF_NACL_PARAM_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_param_attribute _fabric##_nacl_param_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_param_show_##_name, \
+ _fabric##_nacl_param_store_##_name);
+
+#define TF_NACL_PARAM_ATTR_RO(_fabric, _name) \
+static struct target_fabric_nacl_param_attribute _fabric##_nacl_param_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_nacl_param_show_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_base, se_node_acl);
+#define TF_NACL_BASE_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_base_attribute _fabric##_nacl_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_show_##_name, \
+ _fabric##_nacl_store_##_name);
+
+#define TF_NACL_BASE_ATTR_RO(_fabric, _name) \
+static struct target_fabric_nacl_base_attribute _fabric##_nacl_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_nacl_show_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_np_base, se_tpg_np);
+#define TF_NP_BASE_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_np_base_attribute _fabric##_np_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_np_show_##_name, \
+ _fabric##_np_store_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_tpg_attrib, se_portal_group);
+#define TF_TPG_ATTRIB_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_tpg_attrib_attribute _fabric##_tpg_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_tpg_attrib_show_##_name, \
+ _fabric##_tpg_attrib_store_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_tpg_param, se_portal_group);
+#define TF_TPG_PARAM_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_tpg_param_attribute _fabric##_tpg_param_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_tpg_param_show_##_name, \
+ _fabric##_tpg_param_store_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_tpg, se_portal_group);
+#define TF_TPG_BASE_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_tpg_attribute _fabric##_tpg_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_tpg_show_##_name, \
+ _fabric##_tpg_store_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_wwn, target_fabric_configfs);
+#define TF_WWN_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_wwn_show_attr_##_name, \
+ _fabric##_wwn_store_attr_##_name);
+
+#define TF_WWN_ATTR_RO(_fabric, _name) \
+static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_wwn_show_attr_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_discovery, target_fabric_configfs);
+#define TF_DISC_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_discovery_attribute _fabric##_disc_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_disc_show_##_name, \
+ _fabric##_disc_store_##_name);
+
+#define TF_DISC_ATTR_RO(_fabric, _name) \
+static struct target_fabric_discovery_attribute _fabric##_disc_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_disc_show_##_name);
+
+extern int target_fabric_setup_cits(struct target_fabric_configfs *);
--
1.7.2.2
--
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