mirror of
https://github.com/edk2-porting/linux-next.git
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9ac8928e6a
Instead of calling target_fabric_configfs_init() + target_fabric_configfs_register() / target_fabric_configfs_deregister() target_fabric_configfs_free() from every target driver, rewrite the API so that we have simple register/unregister functions that operate on a const operations vector. This patch also fixes a memory leak in several target drivers. Several target drivers namely called target_fabric_configfs_deregister() without calling target_fabric_configfs_free(). A large part of this patch is based on earlier changes from Bart Van Assche <bart.vanassche@sandisk.com>. (v2: Add a new TF_CIT_SETUP_DRV macro so that the core configfs code can declare attributes as either core only or for drivers) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
857 lines
23 KiB
C
857 lines
23 KiB
C
/*******************************************************************************
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* Filename: target_core_tpg.c
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*
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* This file contains generic Target Portal Group related functions.
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*
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* (c) Copyright 2002-2013 Datera, Inc.
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*
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* Nicholas A. Bellinger <nab@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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******************************************************************************/
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#include <linux/net.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/in.h>
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#include <linux/export.h>
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#include <net/sock.h>
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#include <net/tcp.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <target/target_core_base.h>
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#include <target/target_core_backend.h>
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#include <target/target_core_fabric.h>
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#include "target_core_internal.h"
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#include "target_core_pr.h"
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extern struct se_device *g_lun0_dev;
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static DEFINE_SPINLOCK(tpg_lock);
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static LIST_HEAD(tpg_list);
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/* core_clear_initiator_node_from_tpg():
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*
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*
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*/
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static void core_clear_initiator_node_from_tpg(
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struct se_node_acl *nacl,
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struct se_portal_group *tpg)
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{
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int i;
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struct se_dev_entry *deve;
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struct se_lun *lun;
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spin_lock_irq(&nacl->device_list_lock);
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for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
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deve = nacl->device_list[i];
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if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
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continue;
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if (!deve->se_lun) {
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pr_err("%s device entries device pointer is"
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" NULL, but Initiator has access.\n",
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tpg->se_tpg_tfo->get_fabric_name());
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continue;
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}
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lun = deve->se_lun;
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spin_unlock_irq(&nacl->device_list_lock);
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core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
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TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
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spin_lock_irq(&nacl->device_list_lock);
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}
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spin_unlock_irq(&nacl->device_list_lock);
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}
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/* __core_tpg_get_initiator_node_acl():
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*
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* spin_lock_bh(&tpg->acl_node_lock); must be held when calling
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*/
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struct se_node_acl *__core_tpg_get_initiator_node_acl(
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struct se_portal_group *tpg,
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const char *initiatorname)
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{
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struct se_node_acl *acl;
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list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
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if (!strcmp(acl->initiatorname, initiatorname))
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return acl;
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}
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return NULL;
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}
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/* core_tpg_get_initiator_node_acl():
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*
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*
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*/
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struct se_node_acl *core_tpg_get_initiator_node_acl(
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struct se_portal_group *tpg,
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unsigned char *initiatorname)
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{
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struct se_node_acl *acl;
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spin_lock_irq(&tpg->acl_node_lock);
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acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
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spin_unlock_irq(&tpg->acl_node_lock);
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return acl;
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}
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EXPORT_SYMBOL(core_tpg_get_initiator_node_acl);
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/* core_tpg_add_node_to_devs():
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*
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*
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*/
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void core_tpg_add_node_to_devs(
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struct se_node_acl *acl,
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struct se_portal_group *tpg)
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{
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int i = 0;
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u32 lun_access = 0;
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struct se_lun *lun;
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struct se_device *dev;
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spin_lock(&tpg->tpg_lun_lock);
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for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
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lun = tpg->tpg_lun_list[i];
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if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
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continue;
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spin_unlock(&tpg->tpg_lun_lock);
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dev = lun->lun_se_dev;
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/*
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* By default in LIO-Target $FABRIC_MOD,
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* demo_mode_write_protect is ON, or READ_ONLY;
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*/
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if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) {
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lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
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} else {
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/*
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* Allow only optical drives to issue R/W in default RO
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* demo mode.
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*/
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if (dev->transport->get_device_type(dev) == TYPE_DISK)
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lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
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else
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lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
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}
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pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
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" access for LUN in Demo Mode\n",
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tpg->se_tpg_tfo->get_fabric_name(),
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tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
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(lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
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"READ-WRITE" : "READ-ONLY");
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core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun,
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lun_access, acl, tpg);
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/*
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* Check to see if there are any existing persistent reservation
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* APTPL pre-registrations that need to be enabled for this dynamic
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* LUN ACL now..
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*/
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core_scsi3_check_aptpl_registration(dev, tpg, lun, acl,
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lun->unpacked_lun);
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spin_lock(&tpg->tpg_lun_lock);
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}
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spin_unlock(&tpg->tpg_lun_lock);
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}
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/* core_set_queue_depth_for_node():
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*
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*
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*/
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static int core_set_queue_depth_for_node(
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struct se_portal_group *tpg,
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struct se_node_acl *acl)
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{
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if (!acl->queue_depth) {
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pr_err("Queue depth for %s Initiator Node: %s is 0,"
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"defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
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acl->initiatorname);
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acl->queue_depth = 1;
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}
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return 0;
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}
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void array_free(void *array, int n)
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{
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void **a = array;
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int i;
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for (i = 0; i < n; i++)
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kfree(a[i]);
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kfree(a);
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}
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static void *array_zalloc(int n, size_t size, gfp_t flags)
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{
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void **a;
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int i;
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a = kzalloc(n * sizeof(void*), flags);
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if (!a)
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return NULL;
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for (i = 0; i < n; i++) {
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a[i] = kzalloc(size, flags);
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if (!a[i]) {
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array_free(a, n);
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return NULL;
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}
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}
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return a;
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}
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/* core_create_device_list_for_node():
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*
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*
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*/
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static int core_create_device_list_for_node(struct se_node_acl *nacl)
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{
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struct se_dev_entry *deve;
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int i;
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nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
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sizeof(struct se_dev_entry), GFP_KERNEL);
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if (!nacl->device_list) {
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pr_err("Unable to allocate memory for"
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" struct se_node_acl->device_list\n");
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return -ENOMEM;
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}
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for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
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deve = nacl->device_list[i];
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atomic_set(&deve->ua_count, 0);
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atomic_set(&deve->pr_ref_count, 0);
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spin_lock_init(&deve->ua_lock);
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INIT_LIST_HEAD(&deve->alua_port_list);
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INIT_LIST_HEAD(&deve->ua_list);
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}
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return 0;
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}
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/* core_tpg_check_initiator_node_acl()
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*
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*
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*/
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struct se_node_acl *core_tpg_check_initiator_node_acl(
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struct se_portal_group *tpg,
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unsigned char *initiatorname)
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{
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struct se_node_acl *acl;
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acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
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if (acl)
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return acl;
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if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg))
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return NULL;
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acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
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if (!acl)
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return NULL;
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INIT_LIST_HEAD(&acl->acl_list);
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INIT_LIST_HEAD(&acl->acl_sess_list);
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kref_init(&acl->acl_kref);
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init_completion(&acl->acl_free_comp);
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spin_lock_init(&acl->device_list_lock);
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spin_lock_init(&acl->nacl_sess_lock);
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atomic_set(&acl->acl_pr_ref_count, 0);
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acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
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snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
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acl->se_tpg = tpg;
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acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
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acl->dynamic_node_acl = 1;
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tpg->se_tpg_tfo->set_default_node_attributes(acl);
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if (core_create_device_list_for_node(acl) < 0) {
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tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
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return NULL;
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}
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if (core_set_queue_depth_for_node(tpg, acl) < 0) {
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core_free_device_list_for_node(acl, tpg);
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tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
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return NULL;
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}
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/*
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* Here we only create demo-mode MappedLUNs from the active
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* TPG LUNs if the fabric is not explicitly asking for
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* tpg_check_demo_mode_login_only() == 1.
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*/
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if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) ||
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(tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1))
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core_tpg_add_node_to_devs(acl, tpg);
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spin_lock_irq(&tpg->acl_node_lock);
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list_add_tail(&acl->acl_list, &tpg->acl_node_list);
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tpg->num_node_acls++;
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spin_unlock_irq(&tpg->acl_node_lock);
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pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
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" Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
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tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
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tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
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return acl;
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}
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EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
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void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
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{
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while (atomic_read(&nacl->acl_pr_ref_count) != 0)
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cpu_relax();
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}
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void core_tpg_clear_object_luns(struct se_portal_group *tpg)
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{
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int i;
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struct se_lun *lun;
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spin_lock(&tpg->tpg_lun_lock);
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for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
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lun = tpg->tpg_lun_list[i];
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if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
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(lun->lun_se_dev == NULL))
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continue;
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spin_unlock(&tpg->tpg_lun_lock);
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core_dev_del_lun(tpg, lun);
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spin_lock(&tpg->tpg_lun_lock);
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}
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spin_unlock(&tpg->tpg_lun_lock);
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}
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EXPORT_SYMBOL(core_tpg_clear_object_luns);
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/* core_tpg_add_initiator_node_acl():
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*
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*
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*/
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struct se_node_acl *core_tpg_add_initiator_node_acl(
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struct se_portal_group *tpg,
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struct se_node_acl *se_nacl,
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const char *initiatorname,
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u32 queue_depth)
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{
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struct se_node_acl *acl = NULL;
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spin_lock_irq(&tpg->acl_node_lock);
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acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
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if (acl) {
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if (acl->dynamic_node_acl) {
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acl->dynamic_node_acl = 0;
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pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
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" for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
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tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
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spin_unlock_irq(&tpg->acl_node_lock);
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/*
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* Release the locally allocated struct se_node_acl
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* because * core_tpg_add_initiator_node_acl() returned
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* a pointer to an existing demo mode node ACL.
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*/
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if (se_nacl)
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tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
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se_nacl);
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goto done;
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}
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pr_err("ACL entry for %s Initiator"
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" Node %s already exists for TPG %u, ignoring"
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" request.\n", tpg->se_tpg_tfo->get_fabric_name(),
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initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
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spin_unlock_irq(&tpg->acl_node_lock);
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return ERR_PTR(-EEXIST);
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}
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spin_unlock_irq(&tpg->acl_node_lock);
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if (!se_nacl) {
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pr_err("struct se_node_acl pointer is NULL\n");
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return ERR_PTR(-EINVAL);
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}
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/*
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* For v4.x logic the se_node_acl_s is hanging off a fabric
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* dependent structure allocated via
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* struct target_core_fabric_ops->fabric_make_nodeacl()
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*/
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acl = se_nacl;
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INIT_LIST_HEAD(&acl->acl_list);
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INIT_LIST_HEAD(&acl->acl_sess_list);
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kref_init(&acl->acl_kref);
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init_completion(&acl->acl_free_comp);
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spin_lock_init(&acl->device_list_lock);
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spin_lock_init(&acl->nacl_sess_lock);
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atomic_set(&acl->acl_pr_ref_count, 0);
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acl->queue_depth = queue_depth;
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snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
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acl->se_tpg = tpg;
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acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
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tpg->se_tpg_tfo->set_default_node_attributes(acl);
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if (core_create_device_list_for_node(acl) < 0) {
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tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
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return ERR_PTR(-ENOMEM);
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}
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if (core_set_queue_depth_for_node(tpg, acl) < 0) {
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core_free_device_list_for_node(acl, tpg);
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tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
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return ERR_PTR(-EINVAL);
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}
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spin_lock_irq(&tpg->acl_node_lock);
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list_add_tail(&acl->acl_list, &tpg->acl_node_list);
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tpg->num_node_acls++;
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spin_unlock_irq(&tpg->acl_node_lock);
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done:
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pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
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" Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
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tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
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tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
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return acl;
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}
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EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
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/* core_tpg_del_initiator_node_acl():
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*
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*
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*/
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int core_tpg_del_initiator_node_acl(
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struct se_portal_group *tpg,
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struct se_node_acl *acl,
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int force)
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{
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LIST_HEAD(sess_list);
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struct se_session *sess, *sess_tmp;
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unsigned long flags;
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int rc;
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spin_lock_irq(&tpg->acl_node_lock);
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if (acl->dynamic_node_acl) {
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acl->dynamic_node_acl = 0;
|
|
}
|
|
list_del(&acl->acl_list);
|
|
tpg->num_node_acls--;
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
|
|
spin_lock_irqsave(&acl->nacl_sess_lock, flags);
|
|
acl->acl_stop = 1;
|
|
|
|
list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list,
|
|
sess_acl_list) {
|
|
if (sess->sess_tearing_down != 0)
|
|
continue;
|
|
|
|
target_get_session(sess);
|
|
list_move(&sess->sess_acl_list, &sess_list);
|
|
}
|
|
spin_unlock_irqrestore(&acl->nacl_sess_lock, flags);
|
|
|
|
list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) {
|
|
list_del(&sess->sess_acl_list);
|
|
|
|
rc = tpg->se_tpg_tfo->shutdown_session(sess);
|
|
target_put_session(sess);
|
|
if (!rc)
|
|
continue;
|
|
target_put_session(sess);
|
|
}
|
|
target_put_nacl(acl);
|
|
/*
|
|
* Wait for last target_put_nacl() to complete in target_complete_nacl()
|
|
* for active fabric session transport_deregister_session() callbacks.
|
|
*/
|
|
wait_for_completion(&acl->acl_free_comp);
|
|
|
|
core_tpg_wait_for_nacl_pr_ref(acl);
|
|
core_clear_initiator_node_from_tpg(acl, tpg);
|
|
core_free_device_list_for_node(acl, tpg);
|
|
|
|
pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
|
|
" Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
|
|
tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
|
|
|
|
/* core_tpg_set_initiator_node_queue_depth():
|
|
*
|
|
*
|
|
*/
|
|
int core_tpg_set_initiator_node_queue_depth(
|
|
struct se_portal_group *tpg,
|
|
unsigned char *initiatorname,
|
|
u32 queue_depth,
|
|
int force)
|
|
{
|
|
struct se_session *sess, *init_sess = NULL;
|
|
struct se_node_acl *acl;
|
|
unsigned long flags;
|
|
int dynamic_acl = 0;
|
|
|
|
spin_lock_irq(&tpg->acl_node_lock);
|
|
acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
|
|
if (!acl) {
|
|
pr_err("Access Control List entry for %s Initiator"
|
|
" Node %s does not exists for TPG %hu, ignoring"
|
|
" request.\n", tpg->se_tpg_tfo->get_fabric_name(),
|
|
initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
return -ENODEV;
|
|
}
|
|
if (acl->dynamic_node_acl) {
|
|
acl->dynamic_node_acl = 0;
|
|
dynamic_acl = 1;
|
|
}
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
|
|
spin_lock_irqsave(&tpg->session_lock, flags);
|
|
list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
|
|
if (sess->se_node_acl != acl)
|
|
continue;
|
|
|
|
if (!force) {
|
|
pr_err("Unable to change queue depth for %s"
|
|
" Initiator Node: %s while session is"
|
|
" operational. To forcefully change the queue"
|
|
" depth and force session reinstatement"
|
|
" use the \"force=1\" parameter.\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
|
|
spin_unlock_irqrestore(&tpg->session_lock, flags);
|
|
|
|
spin_lock_irq(&tpg->acl_node_lock);
|
|
if (dynamic_acl)
|
|
acl->dynamic_node_acl = 1;
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
return -EEXIST;
|
|
}
|
|
/*
|
|
* Determine if the session needs to be closed by our context.
|
|
*/
|
|
if (!tpg->se_tpg_tfo->shutdown_session(sess))
|
|
continue;
|
|
|
|
init_sess = sess;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* User has requested to change the queue depth for a Initiator Node.
|
|
* Change the value in the Node's struct se_node_acl, and call
|
|
* core_set_queue_depth_for_node() to add the requested queue depth.
|
|
*
|
|
* Finally call tpg->se_tpg_tfo->close_session() to force session
|
|
* reinstatement to occur if there is an active session for the
|
|
* $FABRIC_MOD Initiator Node in question.
|
|
*/
|
|
acl->queue_depth = queue_depth;
|
|
|
|
if (core_set_queue_depth_for_node(tpg, acl) < 0) {
|
|
spin_unlock_irqrestore(&tpg->session_lock, flags);
|
|
/*
|
|
* Force session reinstatement if
|
|
* core_set_queue_depth_for_node() failed, because we assume
|
|
* the $FABRIC_MOD has already the set session reinstatement
|
|
* bit from tpg->se_tpg_tfo->shutdown_session() called above.
|
|
*/
|
|
if (init_sess)
|
|
tpg->se_tpg_tfo->close_session(init_sess);
|
|
|
|
spin_lock_irq(&tpg->acl_node_lock);
|
|
if (dynamic_acl)
|
|
acl->dynamic_node_acl = 1;
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
return -EINVAL;
|
|
}
|
|
spin_unlock_irqrestore(&tpg->session_lock, flags);
|
|
/*
|
|
* If the $FABRIC_MOD session for the Initiator Node ACL exists,
|
|
* forcefully shutdown the $FABRIC_MOD session/nexus.
|
|
*/
|
|
if (init_sess)
|
|
tpg->se_tpg_tfo->close_session(init_sess);
|
|
|
|
pr_debug("Successfully changed queue depth to: %d for Initiator"
|
|
" Node: %s on %s Target Portal Group: %u\n", queue_depth,
|
|
initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg));
|
|
|
|
spin_lock_irq(&tpg->acl_node_lock);
|
|
if (dynamic_acl)
|
|
acl->dynamic_node_acl = 1;
|
|
spin_unlock_irq(&tpg->acl_node_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
|
|
|
|
/* core_tpg_set_initiator_node_tag():
|
|
*
|
|
* Initiator nodeacl tags are not used internally, but may be used by
|
|
* userspace to emulate aliases or groups.
|
|
* Returns length of newly-set tag or -EINVAL.
|
|
*/
|
|
int core_tpg_set_initiator_node_tag(
|
|
struct se_portal_group *tpg,
|
|
struct se_node_acl *acl,
|
|
const char *new_tag)
|
|
{
|
|
if (strlen(new_tag) >= MAX_ACL_TAG_SIZE)
|
|
return -EINVAL;
|
|
|
|
if (!strncmp("NULL", new_tag, 4)) {
|
|
acl->acl_tag[0] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag);
|
|
}
|
|
EXPORT_SYMBOL(core_tpg_set_initiator_node_tag);
|
|
|
|
static void core_tpg_lun_ref_release(struct percpu_ref *ref)
|
|
{
|
|
struct se_lun *lun = container_of(ref, struct se_lun, lun_ref);
|
|
|
|
complete(&lun->lun_ref_comp);
|
|
}
|
|
|
|
static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
|
|
{
|
|
/* Set in core_dev_setup_virtual_lun0() */
|
|
struct se_device *dev = g_lun0_dev;
|
|
struct se_lun *lun = &se_tpg->tpg_virt_lun0;
|
|
u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
|
|
int ret;
|
|
|
|
lun->unpacked_lun = 0;
|
|
lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
|
|
atomic_set(&lun->lun_acl_count, 0);
|
|
init_completion(&lun->lun_shutdown_comp);
|
|
INIT_LIST_HEAD(&lun->lun_acl_list);
|
|
spin_lock_init(&lun->lun_acl_lock);
|
|
spin_lock_init(&lun->lun_sep_lock);
|
|
init_completion(&lun->lun_ref_comp);
|
|
|
|
ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int core_tpg_register(
|
|
const struct target_core_fabric_ops *tfo,
|
|
struct se_wwn *se_wwn,
|
|
struct se_portal_group *se_tpg,
|
|
void *tpg_fabric_ptr,
|
|
int se_tpg_type)
|
|
{
|
|
struct se_lun *lun;
|
|
u32 i;
|
|
|
|
se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
|
|
sizeof(struct se_lun), GFP_KERNEL);
|
|
if (!se_tpg->tpg_lun_list) {
|
|
pr_err("Unable to allocate struct se_portal_group->"
|
|
"tpg_lun_list\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
|
|
lun = se_tpg->tpg_lun_list[i];
|
|
lun->unpacked_lun = i;
|
|
lun->lun_link_magic = SE_LUN_LINK_MAGIC;
|
|
lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
|
|
atomic_set(&lun->lun_acl_count, 0);
|
|
init_completion(&lun->lun_shutdown_comp);
|
|
INIT_LIST_HEAD(&lun->lun_acl_list);
|
|
spin_lock_init(&lun->lun_acl_lock);
|
|
spin_lock_init(&lun->lun_sep_lock);
|
|
init_completion(&lun->lun_ref_comp);
|
|
}
|
|
|
|
se_tpg->se_tpg_type = se_tpg_type;
|
|
se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
|
|
se_tpg->se_tpg_tfo = tfo;
|
|
se_tpg->se_tpg_wwn = se_wwn;
|
|
atomic_set(&se_tpg->tpg_pr_ref_count, 0);
|
|
INIT_LIST_HEAD(&se_tpg->acl_node_list);
|
|
INIT_LIST_HEAD(&se_tpg->se_tpg_node);
|
|
INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
|
|
spin_lock_init(&se_tpg->acl_node_lock);
|
|
spin_lock_init(&se_tpg->session_lock);
|
|
spin_lock_init(&se_tpg->tpg_lun_lock);
|
|
|
|
if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
|
|
if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
|
|
array_free(se_tpg->tpg_lun_list,
|
|
TRANSPORT_MAX_LUNS_PER_TPG);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
spin_lock_bh(&tpg_lock);
|
|
list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
|
|
spin_unlock_bh(&tpg_lock);
|
|
|
|
pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
|
|
" endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
|
|
(se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
|
|
"Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
|
|
"None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(core_tpg_register);
|
|
|
|
int core_tpg_deregister(struct se_portal_group *se_tpg)
|
|
{
|
|
struct se_node_acl *nacl, *nacl_tmp;
|
|
|
|
pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
|
|
" for endpoint: %s Portal Tag %u\n",
|
|
(se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
|
|
"Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
|
|
se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
|
|
se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
|
|
|
|
spin_lock_bh(&tpg_lock);
|
|
list_del(&se_tpg->se_tpg_node);
|
|
spin_unlock_bh(&tpg_lock);
|
|
|
|
while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
|
|
cpu_relax();
|
|
/*
|
|
* Release any remaining demo-mode generated se_node_acl that have
|
|
* not been released because of TFO->tpg_check_demo_mode_cache() == 1
|
|
* in transport_deregister_session().
|
|
*/
|
|
spin_lock_irq(&se_tpg->acl_node_lock);
|
|
list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
|
|
acl_list) {
|
|
list_del(&nacl->acl_list);
|
|
se_tpg->num_node_acls--;
|
|
spin_unlock_irq(&se_tpg->acl_node_lock);
|
|
|
|
core_tpg_wait_for_nacl_pr_ref(nacl);
|
|
core_free_device_list_for_node(nacl, se_tpg);
|
|
se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
|
|
|
|
spin_lock_irq(&se_tpg->acl_node_lock);
|
|
}
|
|
spin_unlock_irq(&se_tpg->acl_node_lock);
|
|
|
|
if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
|
|
core_tpg_remove_lun(se_tpg, &se_tpg->tpg_virt_lun0);
|
|
|
|
se_tpg->se_tpg_fabric_ptr = NULL;
|
|
array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(core_tpg_deregister);
|
|
|
|
struct se_lun *core_tpg_alloc_lun(
|
|
struct se_portal_group *tpg,
|
|
u32 unpacked_lun)
|
|
{
|
|
struct se_lun *lun;
|
|
|
|
if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
|
|
pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
|
|
"-1: %u for Target Portal Group: %u\n",
|
|
tpg->se_tpg_tfo->get_fabric_name(),
|
|
unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg));
|
|
return ERR_PTR(-EOVERFLOW);
|
|
}
|
|
|
|
spin_lock(&tpg->tpg_lun_lock);
|
|
lun = tpg->tpg_lun_list[unpacked_lun];
|
|
if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
|
|
pr_err("TPG Logical Unit Number: %u is already active"
|
|
" on %s Target Portal Group: %u, ignoring request.\n",
|
|
unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
|
|
tpg->se_tpg_tfo->tpg_get_tag(tpg));
|
|
spin_unlock(&tpg->tpg_lun_lock);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
spin_unlock(&tpg->tpg_lun_lock);
|
|
|
|
return lun;
|
|
}
|
|
|
|
int core_tpg_add_lun(
|
|
struct se_portal_group *tpg,
|
|
struct se_lun *lun,
|
|
u32 lun_access,
|
|
struct se_device *dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0,
|
|
GFP_KERNEL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = core_dev_export(dev, tpg, lun);
|
|
if (ret < 0) {
|
|
percpu_ref_exit(&lun->lun_ref);
|
|
return ret;
|
|
}
|
|
|
|
spin_lock(&tpg->tpg_lun_lock);
|
|
lun->lun_access = lun_access;
|
|
lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
|
|
spin_unlock(&tpg->tpg_lun_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void core_tpg_remove_lun(
|
|
struct se_portal_group *tpg,
|
|
struct se_lun *lun)
|
|
{
|
|
core_clear_lun_from_tpg(lun, tpg);
|
|
transport_clear_lun_ref(lun);
|
|
|
|
core_dev_unexport(lun->lun_se_dev, tpg, lun);
|
|
|
|
spin_lock(&tpg->tpg_lun_lock);
|
|
lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
|
|
spin_unlock(&tpg->tpg_lun_lock);
|
|
|
|
percpu_ref_exit(&lun->lun_ref);
|
|
}
|