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linux-next/drivers/target/target_core_configfs.c
Nicholas Bellinger 5b9a4d7280 target: Add MI_REPORT_TARGET_PGS ext. header + implict_trans_secs attribute 
This patch adds support for ALUA MI_REPORT_TARGET_PGS extended header
format defined within SPC-4.  It changes target core ALUA emulation logic
within target_emulate_report_target_port_groups() to support both the
extended and original length only header formats.

It includes adding a new 'implict_trans_secs' attribute for each ALUA
target port group to control the value returned to the application client
for an recommended implict translation timeout in seconds.  By default
this value is currently set to zero, and limited up to 255 by virtue of
using a single byte in the extended header format.

This value is used by target_emulate_report_target_port_groups() within
the extended header logic to set IMPLICIT TRANSITION TIME as defined by
spc4r30.

Cc: Hannes Reinecke <hare@suse.de>
Cc: Rob Evers <revers@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-17 00:45:58 -07:00

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/*******************************************************************************
* Filename: target_core_configfs.c
*
* This file contains ConfigFS logic for the Generic Target Engine project.
*
* Copyright (c) 2008-2011 Rising Tide Systems
* Copyright (c) 2008-2011 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* based on configfs Copyright (C) 2005 Oracle. All rights reserved.
*
* 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 <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/parser.h>
#include <linux/syscalls.h>
#include <linux/configfs.h>
#include <linux/spinlock.h>
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
#include <target/target_core_fabric.h>
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>
#include "target_core_internal.h"
#include "target_core_alua.h"
#include "target_core_pr.h"
#include "target_core_rd.h"
extern struct t10_alua_lu_gp *default_lu_gp;
static LIST_HEAD(g_tf_list);
static DEFINE_MUTEX(g_tf_lock);
struct target_core_configfs_attribute {
struct configfs_attribute attr;
ssize_t (*show)(void *, char *);
ssize_t (*store)(void *, const char *, size_t);
};
static struct config_group target_core_hbagroup;
static struct config_group alua_group;
static struct config_group alua_lu_gps_group;
static inline struct se_hba *
item_to_hba(struct config_item *item)
{
return container_of(to_config_group(item), struct se_hba, hba_group);
}
/*
* Attributes for /sys/kernel/config/target/
*/
static ssize_t target_core_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
" on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
utsname()->sysname, utsname()->machine);
}
static struct configfs_item_operations target_core_fabric_item_ops = {
.show_attribute = target_core_attr_show,
};
static struct configfs_attribute target_core_item_attr_version = {
.ca_owner = THIS_MODULE,
.ca_name = "version",
.ca_mode = S_IRUGO,
};
static struct target_fabric_configfs *target_core_get_fabric(
const char *name)
{
struct target_fabric_configfs *tf;
if (!name)
return NULL;
mutex_lock(&g_tf_lock);
list_for_each_entry(tf, &g_tf_list, tf_list) {
if (!strcmp(tf->tf_name, name)) {
atomic_inc(&tf->tf_access_cnt);
mutex_unlock(&g_tf_lock);
return tf;
}
}
mutex_unlock(&g_tf_lock);
return NULL;
}
/*
* Called from struct target_core_group_ops->make_group()
*/
static struct config_group *target_core_register_fabric(
struct config_group *group,
const char *name)
{
struct target_fabric_configfs *tf;
int ret;
pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
" %s\n", group, name);
/*
* Below are some hardcoded request_module() calls to automatically
* local fabric modules when the following is called:
*
* mkdir -p /sys/kernel/config/target/$MODULE_NAME
*
* Note that this does not limit which TCM fabric module can be
* registered, but simply provids auto loading logic for modules with
* mkdir(2) system calls with known TCM fabric modules.
*/
if (!strncmp(name, "iscsi", 5)) {
/*
* Automatically load the LIO Target fabric module when the
* following is called:
*
* mkdir -p $CONFIGFS/target/iscsi
*/
ret = request_module("iscsi_target_mod");
if (ret < 0) {
pr_err("request_module() failed for"
" iscsi_target_mod.ko: %d\n", ret);
return ERR_PTR(-EINVAL);
}
} else if (!strncmp(name, "loopback", 8)) {
/*
* Automatically load the tcm_loop fabric module when the
* following is called:
*
* mkdir -p $CONFIGFS/target/loopback
*/
ret = request_module("tcm_loop");
if (ret < 0) {
pr_err("request_module() failed for"
" tcm_loop.ko: %d\n", ret);
return ERR_PTR(-EINVAL);
}
}
tf = target_core_get_fabric(name);
if (!tf) {
pr_err("target_core_get_fabric() failed for %s\n",
name);
return ERR_PTR(-EINVAL);
}
pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
" %s\n", tf->tf_name);
/*
* On a successful target_core_get_fabric() look, the returned
* struct target_fabric_configfs *tf will contain a usage reference.
*/
pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
&TF_CIT_TMPL(tf)->tfc_wwn_cit);
tf->tf_group.default_groups = tf->tf_default_groups;
tf->tf_group.default_groups[0] = &tf->tf_disc_group;
tf->tf_group.default_groups[1] = NULL;
config_group_init_type_name(&tf->tf_group, name,
&TF_CIT_TMPL(tf)->tfc_wwn_cit);
config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
&TF_CIT_TMPL(tf)->tfc_discovery_cit);
pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
" %s\n", tf->tf_group.cg_item.ci_name);
/*
* Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
*/
tf->tf_ops.tf_subsys = tf->tf_subsys;
tf->tf_fabric = &tf->tf_group.cg_item;
pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
" for %s\n", name);
return &tf->tf_group;
}
/*
* Called from struct target_core_group_ops->drop_item()
*/
static void target_core_deregister_fabric(
struct config_group *group,
struct config_item *item)
{
struct target_fabric_configfs *tf = container_of(
to_config_group(item), struct target_fabric_configfs, tf_group);
struct config_group *tf_group;
struct config_item *df_item;
int i;
pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
" tf list\n", config_item_name(item));
pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
" %s\n", tf->tf_name);
atomic_dec(&tf->tf_access_cnt);
pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
" tf->tf_fabric for %s\n", tf->tf_name);
tf->tf_fabric = NULL;
pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
" %s\n", config_item_name(item));
tf_group = &tf->tf_group;
for (i = 0; tf_group->default_groups[i]; i++) {
df_item = &tf_group->default_groups[i]->cg_item;
tf_group->default_groups[i] = NULL;
config_item_put(df_item);
}
config_item_put(item);
}
static struct configfs_group_operations target_core_fabric_group_ops = {
.make_group = &target_core_register_fabric,
.drop_item = &target_core_deregister_fabric,
};
/*
* All item attributes appearing in /sys/kernel/target/ appear here.
*/
static struct configfs_attribute *target_core_fabric_item_attrs[] = {
&target_core_item_attr_version,
NULL,
};
/*
* Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
*/
static struct config_item_type target_core_fabrics_item = {
.ct_item_ops = &target_core_fabric_item_ops,
.ct_group_ops = &target_core_fabric_group_ops,
.ct_attrs = target_core_fabric_item_attrs,
.ct_owner = THIS_MODULE,
};
static struct configfs_subsystem target_core_fabrics = {
.su_group = {
.cg_item = {
.ci_namebuf = "target",
.ci_type = &target_core_fabrics_item,
},
},
};
static struct configfs_subsystem *target_core_subsystem[] = {
&target_core_fabrics,
NULL,
};
/*##############################################################################
// Start functions called by external Target Fabrics Modules
//############################################################################*/
/*
* First function called by fabric modules to:
*
* 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
* 2) Add struct target_fabric_configfs to g_tf_list
* 3) Return struct target_fabric_configfs to fabric module to be passed
* into target_fabric_configfs_register().
*/
struct target_fabric_configfs *target_fabric_configfs_init(
struct module *fabric_mod,
const char *name)
{
struct target_fabric_configfs *tf;
if (!(name)) {
pr_err("Unable to locate passed fabric name\n");
return ERR_PTR(-EINVAL);
}
if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
pr_err("Passed name: %s exceeds TARGET_FABRIC"
"_NAME_SIZE\n", name);
return ERR_PTR(-EINVAL);
}
tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
if (!tf)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&tf->tf_list);
atomic_set(&tf->tf_access_cnt, 0);
/*
* Setup the default generic struct config_item_type's (cits) in
* struct target_fabric_configfs->tf_cit_tmpl
*/
tf->tf_module = fabric_mod;
target_fabric_setup_cits(tf);
tf->tf_subsys = target_core_subsystem[0];
snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
mutex_lock(&g_tf_lock);
list_add_tail(&tf->tf_list, &g_tf_list);
mutex_unlock(&g_tf_lock);
pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
">>>>>>>>>>>>>>\n");
pr_debug("Initialized struct target_fabric_configfs: %p for"
" %s\n", tf, tf->tf_name);
return tf;
}
EXPORT_SYMBOL(target_fabric_configfs_init);
/*
* Called by fabric plugins after FAILED target_fabric_configfs_register() call.
*/
void target_fabric_configfs_free(
struct target_fabric_configfs *tf)
{
mutex_lock(&g_tf_lock);
list_del(&tf->tf_list);
mutex_unlock(&g_tf_lock);
kfree(tf);
}
EXPORT_SYMBOL(target_fabric_configfs_free);
/*
* Perform a sanity check of the passed tf->tf_ops before completing
* TCM fabric module registration.
*/
static int target_fabric_tf_ops_check(
struct target_fabric_configfs *tf)
{
struct target_core_fabric_ops *tfo = &tf->tf_ops;
if (!tfo->get_fabric_name) {
pr_err("Missing tfo->get_fabric_name()\n");
return -EINVAL;
}
if (!tfo->get_fabric_proto_ident) {
pr_err("Missing tfo->get_fabric_proto_ident()\n");
return -EINVAL;
}
if (!tfo->tpg_get_wwn) {
pr_err("Missing tfo->tpg_get_wwn()\n");
return -EINVAL;
}
if (!tfo->tpg_get_tag) {
pr_err("Missing tfo->tpg_get_tag()\n");
return -EINVAL;
}
if (!tfo->tpg_get_default_depth) {
pr_err("Missing tfo->tpg_get_default_depth()\n");
return -EINVAL;
}
if (!tfo->tpg_get_pr_transport_id) {
pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
return -EINVAL;
}
if (!tfo->tpg_get_pr_transport_id_len) {
pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
return -EINVAL;
}
if (!tfo->tpg_check_demo_mode) {
pr_err("Missing tfo->tpg_check_demo_mode()\n");
return -EINVAL;
}
if (!tfo->tpg_check_demo_mode_cache) {
pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
return -EINVAL;
}
if (!tfo->tpg_check_demo_mode_write_protect) {
pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
return -EINVAL;
}
if (!tfo->tpg_check_prod_mode_write_protect) {
pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
return -EINVAL;
}
if (!tfo->tpg_alloc_fabric_acl) {
pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
return -EINVAL;
}
if (!tfo->tpg_release_fabric_acl) {
pr_err("Missing tfo->tpg_release_fabric_acl()\n");
return -EINVAL;
}
if (!tfo->tpg_get_inst_index) {
pr_err("Missing tfo->tpg_get_inst_index()\n");
return -EINVAL;
}
if (!tfo->release_cmd) {
pr_err("Missing tfo->release_cmd()\n");
return -EINVAL;
}
if (!tfo->shutdown_session) {
pr_err("Missing tfo->shutdown_session()\n");
return -EINVAL;
}
if (!tfo->close_session) {
pr_err("Missing tfo->close_session()\n");
return -EINVAL;
}
if (!tfo->sess_get_index) {
pr_err("Missing tfo->sess_get_index()\n");
return -EINVAL;
}
if (!tfo->write_pending) {
pr_err("Missing tfo->write_pending()\n");
return -EINVAL;
}
if (!tfo->write_pending_status) {
pr_err("Missing tfo->write_pending_status()\n");
return -EINVAL;
}
if (!tfo->set_default_node_attributes) {
pr_err("Missing tfo->set_default_node_attributes()\n");
return -EINVAL;
}
if (!tfo->get_task_tag) {
pr_err("Missing tfo->get_task_tag()\n");
return -EINVAL;
}
if (!tfo->get_cmd_state) {
pr_err("Missing tfo->get_cmd_state()\n");
return -EINVAL;
}
if (!tfo->queue_data_in) {
pr_err("Missing tfo->queue_data_in()\n");
return -EINVAL;
}
if (!tfo->queue_status) {
pr_err("Missing tfo->queue_status()\n");
return -EINVAL;
}
if (!tfo->queue_tm_rsp) {
pr_err("Missing tfo->queue_tm_rsp()\n");
return -EINVAL;
}
if (!tfo->set_fabric_sense_len) {
pr_err("Missing tfo->set_fabric_sense_len()\n");
return -EINVAL;
}
if (!tfo->get_fabric_sense_len) {
pr_err("Missing tfo->get_fabric_sense_len()\n");
return -EINVAL;
}
/*
* We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
* tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
* target_core_fabric_configfs.c WWN+TPG group context code.
*/
if (!tfo->fabric_make_wwn) {
pr_err("Missing tfo->fabric_make_wwn()\n");
return -EINVAL;
}
if (!tfo->fabric_drop_wwn) {
pr_err("Missing tfo->fabric_drop_wwn()\n");
return -EINVAL;
}
if (!tfo->fabric_make_tpg) {
pr_err("Missing tfo->fabric_make_tpg()\n");
return -EINVAL;
}
if (!tfo->fabric_drop_tpg) {
pr_err("Missing tfo->fabric_drop_tpg()\n");
return -EINVAL;
}
return 0;
}
/*
* Called 2nd from fabric module with returned parameter of
* struct target_fabric_configfs * from target_fabric_configfs_init().
*
* Upon a successful registration, the new fabric's struct config_item is
* return. Also, a pointer to this struct is set in the passed
* struct target_fabric_configfs.
*/
int target_fabric_configfs_register(
struct target_fabric_configfs *tf)
{
int ret;
if (!tf) {
pr_err("Unable to locate target_fabric_configfs"
" pointer\n");
return -EINVAL;
}
if (!tf->tf_subsys) {
pr_err("Unable to target struct config_subsystem"
" pointer\n");
return -EINVAL;
}
ret = target_fabric_tf_ops_check(tf);
if (ret < 0)
return ret;
pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
">>>>>>>>>>\n");
return 0;
}
EXPORT_SYMBOL(target_fabric_configfs_register);
void target_fabric_configfs_deregister(
struct target_fabric_configfs *tf)
{
struct configfs_subsystem *su;
if (!tf) {
pr_err("Unable to locate passed target_fabric_"
"configfs\n");
return;
}
su = tf->tf_subsys;
if (!su) {
pr_err("Unable to locate passed tf->tf_subsys"
" pointer\n");
return;
}
pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
">>>>>>>>>>>>\n");
mutex_lock(&g_tf_lock);
if (atomic_read(&tf->tf_access_cnt)) {
mutex_unlock(&g_tf_lock);
pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
tf->tf_name);
BUG();
}
list_del(&tf->tf_list);
mutex_unlock(&g_tf_lock);
pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
" %s\n", tf->tf_name);
tf->tf_module = NULL;
tf->tf_subsys = NULL;
kfree(tf);
pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
">>>>>\n");
}
EXPORT_SYMBOL(target_fabric_configfs_deregister);
/*##############################################################################
// Stop functions called by external Target Fabrics Modules
//############################################################################*/
/* Start functions for struct config_item_type target_core_dev_attrib_cit */
#define DEF_DEV_ATTRIB_SHOW(_name) \
static ssize_t target_core_dev_show_attr_##_name( \
struct se_dev_attrib *da, \
char *page) \
{ \
struct se_device *dev; \
struct se_subsystem_dev *se_dev = da->da_sub_dev; \
ssize_t rb; \
\
spin_lock(&se_dev->se_dev_lock); \
dev = se_dev->se_dev_ptr; \
if (!dev) { \
spin_unlock(&se_dev->se_dev_lock); \
return -ENODEV; \
} \
rb = snprintf(page, PAGE_SIZE, "%u\n", \
(u32)dev->se_sub_dev->se_dev_attrib._name); \
spin_unlock(&se_dev->se_dev_lock); \
\
return rb; \
}
#define DEF_DEV_ATTRIB_STORE(_name) \
static ssize_t target_core_dev_store_attr_##_name( \
struct se_dev_attrib *da, \
const char *page, \
size_t count) \
{ \
struct se_device *dev; \
struct se_subsystem_dev *se_dev = da->da_sub_dev; \
unsigned long val; \
int ret; \
\
spin_lock(&se_dev->se_dev_lock); \
dev = se_dev->se_dev_ptr; \
if (!dev) { \
spin_unlock(&se_dev->se_dev_lock); \
return -ENODEV; \
} \
ret = strict_strtoul(page, 0, &val); \
if (ret < 0) { \
spin_unlock(&se_dev->se_dev_lock); \
pr_err("strict_strtoul() failed with" \
" ret: %d\n", ret); \
return -EINVAL; \
} \
ret = se_dev_set_##_name(dev, (u32)val); \
spin_unlock(&se_dev->se_dev_lock); \
\
return (!ret) ? count : -EINVAL; \
}
#define DEF_DEV_ATTRIB(_name) \
DEF_DEV_ATTRIB_SHOW(_name); \
DEF_DEV_ATTRIB_STORE(_name);
#define DEF_DEV_ATTRIB_RO(_name) \
DEF_DEV_ATTRIB_SHOW(_name);
CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
#define SE_DEV_ATTR(_name, _mode) \
static struct target_core_dev_attrib_attribute \
target_core_dev_attrib_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_core_dev_show_attr_##_name, \
target_core_dev_store_attr_##_name);
#define SE_DEV_ATTR_RO(_name); \
static struct target_core_dev_attrib_attribute \
target_core_dev_attrib_##_name = \
__CONFIGFS_EATTR_RO(_name, \
target_core_dev_show_attr_##_name);
DEF_DEV_ATTRIB(emulate_dpo);
SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_fua_write);
SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_fua_read);
SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_write_cache);
SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_tas);
SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_tpu);
SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_tpws);
SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(enforce_pr_isids);
SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(is_nonrot);
SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(emulate_rest_reord);
SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB_RO(hw_block_size);
SE_DEV_ATTR_RO(hw_block_size);
DEF_DEV_ATTRIB(block_size);
SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB_RO(hw_max_sectors);
SE_DEV_ATTR_RO(hw_max_sectors);
DEF_DEV_ATTRIB(fabric_max_sectors);
SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(optimal_sectors);
SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB_RO(hw_queue_depth);
SE_DEV_ATTR_RO(hw_queue_depth);
DEF_DEV_ATTRIB(queue_depth);
SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(max_unmap_lba_count);
SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(max_unmap_block_desc_count);
SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(unmap_granularity);
SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(unmap_granularity_alignment);
SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
&target_core_dev_attrib_emulate_dpo.attr,
&target_core_dev_attrib_emulate_fua_write.attr,
&target_core_dev_attrib_emulate_fua_read.attr,
&target_core_dev_attrib_emulate_write_cache.attr,
&target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
&target_core_dev_attrib_emulate_tas.attr,
&target_core_dev_attrib_emulate_tpu.attr,
&target_core_dev_attrib_emulate_tpws.attr,
&target_core_dev_attrib_enforce_pr_isids.attr,
&target_core_dev_attrib_is_nonrot.attr,
&target_core_dev_attrib_emulate_rest_reord.attr,
&target_core_dev_attrib_hw_block_size.attr,
&target_core_dev_attrib_block_size.attr,
&target_core_dev_attrib_hw_max_sectors.attr,
&target_core_dev_attrib_fabric_max_sectors.attr,
&target_core_dev_attrib_optimal_sectors.attr,
&target_core_dev_attrib_hw_queue_depth.attr,
&target_core_dev_attrib_queue_depth.attr,
&target_core_dev_attrib_max_unmap_lba_count.attr,
&target_core_dev_attrib_max_unmap_block_desc_count.attr,
&target_core_dev_attrib_unmap_granularity.attr,
&target_core_dev_attrib_unmap_granularity_alignment.attr,
NULL,
};
static struct configfs_item_operations target_core_dev_attrib_ops = {
.show_attribute = target_core_dev_attrib_attr_show,
.store_attribute = target_core_dev_attrib_attr_store,
};
static struct config_item_type target_core_dev_attrib_cit = {
.ct_item_ops = &target_core_dev_attrib_ops,
.ct_attrs = target_core_dev_attrib_attrs,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_dev_attrib_cit */
/* Start functions for struct config_item_type target_core_dev_wwn_cit */
CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
#define SE_DEV_WWN_ATTR(_name, _mode) \
static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_core_dev_wwn_show_attr_##_name, \
target_core_dev_wwn_store_attr_##_name);
#define SE_DEV_WWN_ATTR_RO(_name); \
do { \
static struct target_core_dev_wwn_attribute \
target_core_dev_wwn_##_name = \
__CONFIGFS_EATTR_RO(_name, \
target_core_dev_wwn_show_attr_##_name); \
} while (0);
/*
* VPD page 0x80 Unit serial
*/
static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
struct t10_wwn *t10_wwn,
char *page)
{
struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
struct se_device *dev;
dev = se_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
&t10_wwn->unit_serial[0]);
}
static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
struct t10_wwn *t10_wwn,
const char *page,
size_t count)
{
struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
struct se_device *dev;
unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
/*
* If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
* from the struct scsi_device level firmware, do not allow
* VPD Unit Serial to be emulated.
*
* Note this struct scsi_device could also be emulating VPD
* information from its drivers/scsi LLD. But for now we assume
* it is doing 'the right thing' wrt a world wide unique
* VPD Unit Serial Number that OS dependent multipath can depend on.
*/
if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
pr_err("Underlying SCSI device firmware provided VPD"
" Unit Serial, ignoring request\n");
return -EOPNOTSUPP;
}
if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
pr_err("Emulated VPD Unit Serial exceeds"
" INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
return -EOVERFLOW;
}
/*
* Check to see if any active $FABRIC_MOD exports exist. If they
* do exist, fail here as changing this information on the fly
* (underneath the initiator side OS dependent multipath code)
* could cause negative effects.
*/
dev = su_dev->se_dev_ptr;
if (dev) {
if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
pr_err("Unable to set VPD Unit Serial while"
" active %d $FABRIC_MOD exports exist\n",
atomic_read(&dev->dev_export_obj.obj_access_count));
return -EINVAL;
}
}
/*
* This currently assumes ASCII encoding for emulated VPD Unit Serial.
*
* Also, strip any newline added from the userspace
* echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
*/
memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
"%s", strstrip(buf));
su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
" %s\n", su_dev->t10_wwn.unit_serial);
return count;
}
SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
/*
* VPD page 0x83 Protocol Identifier
*/
static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
struct t10_wwn *t10_wwn,
char *page)
{
struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
struct se_device *dev;
struct t10_vpd *vpd;
unsigned char buf[VPD_TMP_BUF_SIZE];
ssize_t len = 0;
dev = se_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
memset(buf, 0, VPD_TMP_BUF_SIZE);
spin_lock(&t10_wwn->t10_vpd_lock);
list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
if (!vpd->protocol_identifier_set)
continue;
transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
if (len + strlen(buf) >= PAGE_SIZE)
break;
len += sprintf(page+len, "%s", buf);
}
spin_unlock(&t10_wwn->t10_vpd_lock);
return len;
}
static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
struct t10_wwn *t10_wwn,
const char *page,
size_t count)
{
return -ENOSYS;
}
SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
/*
* Generic wrapper for dumping VPD identifiers by association.
*/
#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
static ssize_t target_core_dev_wwn_show_attr_##_name( \
struct t10_wwn *t10_wwn, \
char *page) \
{ \
struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
struct se_device *dev; \
struct t10_vpd *vpd; \
unsigned char buf[VPD_TMP_BUF_SIZE]; \
ssize_t len = 0; \
\
dev = se_dev->se_dev_ptr; \
if (!dev) \
return -ENODEV; \
\
spin_lock(&t10_wwn->t10_vpd_lock); \
list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
if (vpd->association != _assoc) \
continue; \
\
memset(buf, 0, VPD_TMP_BUF_SIZE); \
transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
if (len + strlen(buf) >= PAGE_SIZE) \
break; \
len += sprintf(page+len, "%s", buf); \
\
memset(buf, 0, VPD_TMP_BUF_SIZE); \
transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
if (len + strlen(buf) >= PAGE_SIZE) \
break; \
len += sprintf(page+len, "%s", buf); \
\
memset(buf, 0, VPD_TMP_BUF_SIZE); \
transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
if (len + strlen(buf) >= PAGE_SIZE) \
break; \
len += sprintf(page+len, "%s", buf); \
} \
spin_unlock(&t10_wwn->t10_vpd_lock); \
\
return len; \
}
/*
* VPD page 0x83 Association: Logical Unit
*/
DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
struct t10_wwn *t10_wwn,
const char *page,
size_t count)
{
return -ENOSYS;
}
SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
/*
* VPD page 0x83 Association: Target Port
*/
DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
struct t10_wwn *t10_wwn,
const char *page,
size_t count)
{
return -ENOSYS;
}
SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
/*
* VPD page 0x83 Association: SCSI Target Device
*/
DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
struct t10_wwn *t10_wwn,
const char *page,
size_t count)
{
return -ENOSYS;
}
SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
&target_core_dev_wwn_vpd_unit_serial.attr,
&target_core_dev_wwn_vpd_protocol_identifier.attr,
&target_core_dev_wwn_vpd_assoc_logical_unit.attr,
&target_core_dev_wwn_vpd_assoc_target_port.attr,
&target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
NULL,
};
static struct configfs_item_operations target_core_dev_wwn_ops = {
.show_attribute = target_core_dev_wwn_attr_show,
.store_attribute = target_core_dev_wwn_attr_store,
};
static struct config_item_type target_core_dev_wwn_cit = {
.ct_item_ops = &target_core_dev_wwn_ops,
.ct_attrs = target_core_dev_wwn_attrs,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_dev_wwn_cit */
/* Start functions for struct config_item_type target_core_dev_pr_cit */
CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
#define SE_DEV_PR_ATTR(_name, _mode) \
static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_core_dev_pr_show_attr_##_name, \
target_core_dev_pr_store_attr_##_name);
#define SE_DEV_PR_ATTR_RO(_name); \
static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
__CONFIGFS_EATTR_RO(_name, \
target_core_dev_pr_show_attr_##_name);
/*
* res_holder
*/
static ssize_t target_core_dev_pr_show_spc3_res(
struct se_device *dev,
char *page,
ssize_t *len)
{
struct se_node_acl *se_nacl;
struct t10_pr_registration *pr_reg;
char i_buf[PR_REG_ISID_ID_LEN];
int prf_isid;
memset(i_buf, 0, PR_REG_ISID_ID_LEN);
spin_lock(&dev->dev_reservation_lock);
pr_reg = dev->dev_pr_res_holder;
if (!pr_reg) {
*len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
spin_unlock(&dev->dev_reservation_lock);
return *len;
}
se_nacl = pr_reg->pr_reg_nacl;
prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
PR_REG_ISID_ID_LEN);
*len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
spin_unlock(&dev->dev_reservation_lock);
return *len;
}
static ssize_t target_core_dev_pr_show_spc2_res(
struct se_device *dev,
char *page,
ssize_t *len)
{
struct se_node_acl *se_nacl;
spin_lock(&dev->dev_reservation_lock);
se_nacl = dev->dev_reserved_node_acl;
if (!se_nacl) {
*len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
spin_unlock(&dev->dev_reservation_lock);
return *len;
}
*len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
se_nacl->initiatorname);
spin_unlock(&dev->dev_reservation_lock);
return *len;
}
static ssize_t target_core_dev_pr_show_attr_res_holder(
struct se_subsystem_dev *su_dev,
char *page)
{
ssize_t len = 0;
if (!su_dev->se_dev_ptr)
return -ENODEV;
switch (su_dev->t10_pr.res_type) {
case SPC3_PERSISTENT_RESERVATIONS:
target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
page, &len);
break;
case SPC2_RESERVATIONS:
target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
page, &len);
break;
case SPC_PASSTHROUGH:
len += sprintf(page+len, "Passthrough\n");
break;
default:
len += sprintf(page+len, "Unknown\n");
break;
}
return len;
}
SE_DEV_PR_ATTR_RO(res_holder);
/*
* res_pr_all_tgt_pts
*/
static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
struct se_subsystem_dev *su_dev,
char *page)
{
struct se_device *dev;
struct t10_pr_registration *pr_reg;
ssize_t len = 0;
dev = su_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return len;
spin_lock(&dev->dev_reservation_lock);
pr_reg = dev->dev_pr_res_holder;
if (!pr_reg) {
len = sprintf(page, "No SPC-3 Reservation holder\n");
spin_unlock(&dev->dev_reservation_lock);
return len;
}
/*
* See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
* Basic PERSISTENT RESERVER OUT parameter list, page 290
*/
if (pr_reg->pr_reg_all_tg_pt)
len = sprintf(page, "SPC-3 Reservation: All Target"
" Ports registration\n");
else
len = sprintf(page, "SPC-3 Reservation: Single"
" Target Port registration\n");
spin_unlock(&dev->dev_reservation_lock);
return len;
}
SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
/*
* res_pr_generation
*/
static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
struct se_subsystem_dev *su_dev,
char *page)
{
if (!su_dev->se_dev_ptr)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return 0;
return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
}
SE_DEV_PR_ATTR_RO(res_pr_generation);
/*
* res_pr_holder_tg_port
*/
static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
struct se_subsystem_dev *su_dev,
char *page)
{
struct se_device *dev;
struct se_node_acl *se_nacl;
struct se_lun *lun;
struct se_portal_group *se_tpg;
struct t10_pr_registration *pr_reg;
struct target_core_fabric_ops *tfo;
ssize_t len = 0;
dev = su_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return len;
spin_lock(&dev->dev_reservation_lock);
pr_reg = dev->dev_pr_res_holder;
if (!pr_reg) {
len = sprintf(page, "No SPC-3 Reservation holder\n");
spin_unlock(&dev->dev_reservation_lock);
return len;
}
se_nacl = pr_reg->pr_reg_nacl;
se_tpg = se_nacl->se_tpg;
lun = pr_reg->pr_reg_tg_pt_lun;
tfo = se_tpg->se_tpg_tfo;
len += sprintf(page+len, "SPC-3 Reservation: %s"
" Target Node Endpoint: %s\n", tfo->get_fabric_name(),
tfo->tpg_get_wwn(se_tpg));
len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
" Identifer Tag: %hu %s Portal Group Tag: %hu"
" %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
tfo->get_fabric_name(), lun->unpacked_lun);
spin_unlock(&dev->dev_reservation_lock);
return len;
}
SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
/*
* res_pr_registered_i_pts
*/
static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
struct se_subsystem_dev *su_dev,
char *page)
{
struct target_core_fabric_ops *tfo;
struct t10_pr_registration *pr_reg;
unsigned char buf[384];
char i_buf[PR_REG_ISID_ID_LEN];
ssize_t len = 0;
int reg_count = 0, prf_isid;
if (!su_dev->se_dev_ptr)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return len;
len += sprintf(page+len, "SPC-3 PR Registrations:\n");
spin_lock(&su_dev->t10_pr.registration_lock);
list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
pr_reg_list) {
memset(buf, 0, 384);
memset(i_buf, 0, PR_REG_ISID_ID_LEN);
tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
PR_REG_ISID_ID_LEN);
sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
tfo->get_fabric_name(),
pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
&i_buf[0] : "", pr_reg->pr_res_key,
pr_reg->pr_res_generation);
if (len + strlen(buf) >= PAGE_SIZE)
break;
len += sprintf(page+len, "%s", buf);
reg_count++;
}
spin_unlock(&su_dev->t10_pr.registration_lock);
if (!reg_count)
len += sprintf(page+len, "None\n");
return len;
}
SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
/*
* res_pr_type
*/
static ssize_t target_core_dev_pr_show_attr_res_pr_type(
struct se_subsystem_dev *su_dev,
char *page)
{
struct se_device *dev;
struct t10_pr_registration *pr_reg;
ssize_t len = 0;
dev = su_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return len;
spin_lock(&dev->dev_reservation_lock);
pr_reg = dev->dev_pr_res_holder;
if (!pr_reg) {
len = sprintf(page, "No SPC-3 Reservation holder\n");
spin_unlock(&dev->dev_reservation_lock);
return len;
}
len = sprintf(page, "SPC-3 Reservation Type: %s\n",
core_scsi3_pr_dump_type(pr_reg->pr_res_type));
spin_unlock(&dev->dev_reservation_lock);
return len;
}
SE_DEV_PR_ATTR_RO(res_pr_type);
/*
* res_type
*/
static ssize_t target_core_dev_pr_show_attr_res_type(
struct se_subsystem_dev *su_dev,
char *page)
{
ssize_t len = 0;
if (!su_dev->se_dev_ptr)
return -ENODEV;
switch (su_dev->t10_pr.res_type) {
case SPC3_PERSISTENT_RESERVATIONS:
len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
break;
case SPC2_RESERVATIONS:
len = sprintf(page, "SPC2_RESERVATIONS\n");
break;
case SPC_PASSTHROUGH:
len = sprintf(page, "SPC_PASSTHROUGH\n");
break;
default:
len = sprintf(page, "UNKNOWN\n");
break;
}
return len;
}
SE_DEV_PR_ATTR_RO(res_type);
/*
* res_aptpl_active
*/
static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
struct se_subsystem_dev *su_dev,
char *page)
{
if (!su_dev->se_dev_ptr)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return 0;
return sprintf(page, "APTPL Bit Status: %s\n",
(su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
}
SE_DEV_PR_ATTR_RO(res_aptpl_active);
/*
* res_aptpl_metadata
*/
static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
struct se_subsystem_dev *su_dev,
char *page)
{
if (!su_dev->se_dev_ptr)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return 0;
return sprintf(page, "Ready to process PR APTPL metadata..\n");
}
enum {
Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
};
static match_table_t tokens = {
{Opt_initiator_fabric, "initiator_fabric=%s"},
{Opt_initiator_node, "initiator_node=%s"},
{Opt_initiator_sid, "initiator_sid=%s"},
{Opt_sa_res_key, "sa_res_key=%s"},
{Opt_res_holder, "res_holder=%d"},
{Opt_res_type, "res_type=%d"},
{Opt_res_scope, "res_scope=%d"},
{Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
{Opt_mapped_lun, "mapped_lun=%d"},
{Opt_target_fabric, "target_fabric=%s"},
{Opt_target_node, "target_node=%s"},
{Opt_tpgt, "tpgt=%d"},
{Opt_port_rtpi, "port_rtpi=%d"},
{Opt_target_lun, "target_lun=%d"},
{Opt_err, NULL}
};
static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
struct se_subsystem_dev *su_dev,
const char *page,
size_t count)
{
struct se_device *dev;
unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
unsigned char *t_fabric = NULL, *t_port = NULL;
char *orig, *ptr, *arg_p, *opts;
substring_t args[MAX_OPT_ARGS];
unsigned long long tmp_ll;
u64 sa_res_key = 0;
u32 mapped_lun = 0, target_lun = 0;
int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
u16 port_rpti = 0, tpgt = 0;
u8 type = 0, scope;
dev = su_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
return 0;
if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
pr_debug("Unable to process APTPL metadata while"
" active fabric exports exist\n");
return -EINVAL;
}
opts = kstrdup(page, GFP_KERNEL);
if (!opts)
return -ENOMEM;
orig = opts;
while ((ptr = strsep(&opts, ",\n")) != NULL) {
if (!*ptr)
continue;
token = match_token(ptr, tokens, args);
switch (token) {
case Opt_initiator_fabric:
i_fabric = match_strdup(&args[0]);
if (!i_fabric) {
ret = -ENOMEM;
goto out;
}
break;
case Opt_initiator_node:
i_port = match_strdup(&args[0]);
if (!i_port) {
ret = -ENOMEM;
goto out;
}
if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
pr_err("APTPL metadata initiator_node="
" exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
PR_APTPL_MAX_IPORT_LEN);
ret = -EINVAL;
break;
}
break;
case Opt_initiator_sid:
isid = match_strdup(&args[0]);
if (!isid) {
ret = -ENOMEM;
goto out;
}
if (strlen(isid) >= PR_REG_ISID_LEN) {
pr_err("APTPL metadata initiator_isid"
"= exceeds PR_REG_ISID_LEN: %d\n",
PR_REG_ISID_LEN);
ret = -EINVAL;
break;
}
break;
case Opt_sa_res_key:
arg_p = match_strdup(&args[0]);
if (!arg_p) {
ret = -ENOMEM;
goto out;
}
ret = strict_strtoull(arg_p, 0, &tmp_ll);
if (ret < 0) {
pr_err("strict_strtoull() failed for"
" sa_res_key=\n");
goto out;
}
sa_res_key = (u64)tmp_ll;
break;
/*
* PR APTPL Metadata for Reservation
*/
case Opt_res_holder:
match_int(args, &arg);
res_holder = arg;
break;
case Opt_res_type:
match_int(args, &arg);
type = (u8)arg;
break;
case Opt_res_scope:
match_int(args, &arg);
scope = (u8)arg;
break;
case Opt_res_all_tg_pt:
match_int(args, &arg);
all_tg_pt = (int)arg;
break;
case Opt_mapped_lun:
match_int(args, &arg);
mapped_lun = (u32)arg;
break;
/*
* PR APTPL Metadata for Target Port
*/
case Opt_target_fabric:
t_fabric = match_strdup(&args[0]);
if (!t_fabric) {
ret = -ENOMEM;
goto out;
}
break;
case Opt_target_node:
t_port = match_strdup(&args[0]);
if (!t_port) {
ret = -ENOMEM;
goto out;
}
if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
pr_err("APTPL metadata target_node="
" exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
PR_APTPL_MAX_TPORT_LEN);
ret = -EINVAL;
break;
}
break;
case Opt_tpgt:
match_int(args, &arg);
tpgt = (u16)arg;
break;
case Opt_port_rtpi:
match_int(args, &arg);
port_rpti = (u16)arg;
break;
case Opt_target_lun:
match_int(args, &arg);
target_lun = (u32)arg;
break;
default:
break;
}
}
if (!i_port || !t_port || !sa_res_key) {
pr_err("Illegal parameters for APTPL registration\n");
ret = -EINVAL;
goto out;
}
if (res_holder && !(type)) {
pr_err("Illegal PR type: 0x%02x for reservation"
" holder\n", type);
ret = -EINVAL;
goto out;
}
ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
i_port, isid, mapped_lun, t_port, tpgt, target_lun,
res_holder, all_tg_pt, type);
out:
kfree(i_fabric);
kfree(i_port);
kfree(isid);
kfree(t_fabric);
kfree(t_port);
kfree(orig);
return (ret == 0) ? count : ret;
}
SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
static struct configfs_attribute *target_core_dev_pr_attrs[] = {
&target_core_dev_pr_res_holder.attr,
&target_core_dev_pr_res_pr_all_tgt_pts.attr,
&target_core_dev_pr_res_pr_generation.attr,
&target_core_dev_pr_res_pr_holder_tg_port.attr,
&target_core_dev_pr_res_pr_registered_i_pts.attr,
&target_core_dev_pr_res_pr_type.attr,
&target_core_dev_pr_res_type.attr,
&target_core_dev_pr_res_aptpl_active.attr,
&target_core_dev_pr_res_aptpl_metadata.attr,
NULL,
};
static struct configfs_item_operations target_core_dev_pr_ops = {
.show_attribute = target_core_dev_pr_attr_show,
.store_attribute = target_core_dev_pr_attr_store,
};
static struct config_item_type target_core_dev_pr_cit = {
.ct_item_ops = &target_core_dev_pr_ops,
.ct_attrs = target_core_dev_pr_attrs,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_dev_pr_cit */
/* Start functions for struct config_item_type target_core_dev_cit */
static ssize_t target_core_show_dev_info(void *p, char *page)
{
struct se_subsystem_dev *se_dev = p;
struct se_hba *hba = se_dev->se_dev_hba;
struct se_subsystem_api *t = hba->transport;
int bl = 0;
ssize_t read_bytes = 0;
if (!se_dev->se_dev_ptr)
return -ENODEV;
transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
read_bytes += bl;
read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
return read_bytes;
}
static struct target_core_configfs_attribute target_core_attr_dev_info = {
.attr = { .ca_owner = THIS_MODULE,
.ca_name = "info",
.ca_mode = S_IRUGO },
.show = target_core_show_dev_info,
.store = NULL,
};
static ssize_t target_core_store_dev_control(
void *p,
const char *page,
size_t count)
{
struct se_subsystem_dev *se_dev = p;
struct se_hba *hba = se_dev->se_dev_hba;
struct se_subsystem_api *t = hba->transport;
if (!se_dev->se_dev_su_ptr) {
pr_err("Unable to locate struct se_subsystem_dev>se"
"_dev_su_ptr\n");
return -EINVAL;
}
return t->set_configfs_dev_params(hba, se_dev, page, count);
}
static struct target_core_configfs_attribute target_core_attr_dev_control = {
.attr = { .ca_owner = THIS_MODULE,
.ca_name = "control",
.ca_mode = S_IWUSR },
.show = NULL,
.store = target_core_store_dev_control,
};
static ssize_t target_core_show_dev_alias(void *p, char *page)
{
struct se_subsystem_dev *se_dev = p;
if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
return 0;
return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
}
static ssize_t target_core_store_dev_alias(
void *p,
const char *page,
size_t count)
{
struct se_subsystem_dev *se_dev = p;
struct se_hba *hba = se_dev->se_dev_hba;
ssize_t read_bytes;
if (count > (SE_DEV_ALIAS_LEN-1)) {
pr_err("alias count: %d exceeds"
" SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
SE_DEV_ALIAS_LEN-1);
return -EINVAL;
}
read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
"%s", page);
if (!read_bytes)
return -EINVAL;
if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
se_dev->se_dev_alias[read_bytes - 1] = '\0';
se_dev->su_dev_flags |= SDF_USING_ALIAS;
pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
config_item_name(&hba->hba_group.cg_item),
config_item_name(&se_dev->se_dev_group.cg_item),
se_dev->se_dev_alias);
return read_bytes;
}
static struct target_core_configfs_attribute target_core_attr_dev_alias = {
.attr = { .ca_owner = THIS_MODULE,
.ca_name = "alias",
.ca_mode = S_IRUGO | S_IWUSR },
.show = target_core_show_dev_alias,
.store = target_core_store_dev_alias,
};
static ssize_t target_core_show_dev_udev_path(void *p, char *page)
{
struct se_subsystem_dev *se_dev = p;
if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
return 0;
return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
}
static ssize_t target_core_store_dev_udev_path(
void *p,
const char *page,
size_t count)
{
struct se_subsystem_dev *se_dev = p;
struct se_hba *hba = se_dev->se_dev_hba;
ssize_t read_bytes;
if (count > (SE_UDEV_PATH_LEN-1)) {
pr_err("udev_path count: %d exceeds"
" SE_UDEV_PATH_LEN-1: %u\n", (int)count,
SE_UDEV_PATH_LEN-1);
return -EINVAL;
}
read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
"%s", page);
if (!read_bytes)
return -EINVAL;
if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
config_item_name(&hba->hba_group.cg_item),
config_item_name(&se_dev->se_dev_group.cg_item),
se_dev->se_dev_udev_path);
return read_bytes;
}
static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
.attr = { .ca_owner = THIS_MODULE,
.ca_name = "udev_path",
.ca_mode = S_IRUGO | S_IWUSR },
.show = target_core_show_dev_udev_path,
.store = target_core_store_dev_udev_path,
};
static ssize_t target_core_store_dev_enable(
void *p,
const char *page,
size_t count)
{
struct se_subsystem_dev *se_dev = p;
struct se_device *dev;
struct se_hba *hba = se_dev->se_dev_hba;
struct se_subsystem_api *t = hba->transport;
char *ptr;
ptr = strstr(page, "1");
if (!ptr) {
pr_err("For dev_enable ops, only valid value"
" is \"1\"\n");
return -EINVAL;
}
if (se_dev->se_dev_ptr) {
pr_err("se_dev->se_dev_ptr already set for storage"
" object\n");
return -EEXIST;
}
if (t->check_configfs_dev_params(hba, se_dev) < 0)
return -EINVAL;
dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
if (IS_ERR(dev))
return PTR_ERR(dev);
else if (!dev)
return -EINVAL;
se_dev->se_dev_ptr = dev;
pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
" %p\n", se_dev->se_dev_ptr);
return count;
}
static struct target_core_configfs_attribute target_core_attr_dev_enable = {
.attr = { .ca_owner = THIS_MODULE,
.ca_name = "enable",
.ca_mode = S_IWUSR },
.show = NULL,
.store = target_core_store_dev_enable,
};
static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
{
struct se_device *dev;
struct se_subsystem_dev *su_dev = p;
struct config_item *lu_ci;
struct t10_alua_lu_gp *lu_gp;
struct t10_alua_lu_gp_member *lu_gp_mem;
ssize_t len = 0;
dev = su_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
return len;
lu_gp_mem = dev->dev_alua_lu_gp_mem;
if (!lu_gp_mem) {
pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
" pointer\n");
return -EINVAL;
}
spin_lock(&lu_gp_mem->lu_gp_mem_lock);
lu_gp = lu_gp_mem->lu_gp;
if (lu_gp) {
lu_ci = &lu_gp->lu_gp_group.cg_item;
len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
config_item_name(lu_ci), lu_gp->lu_gp_id);
}
spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
return len;
}
static ssize_t target_core_store_alua_lu_gp(
void *p,
const char *page,
size_t count)
{
struct se_device *dev;
struct se_subsystem_dev *su_dev = p;
struct se_hba *hba = su_dev->se_dev_hba;
struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
struct t10_alua_lu_gp_member *lu_gp_mem;
unsigned char buf[LU_GROUP_NAME_BUF];
int move = 0;
dev = su_dev->se_dev_ptr;
if (!dev)
return -ENODEV;
if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
config_item_name(&hba->hba_group.cg_item),
config_item_name(&su_dev->se_dev_group.cg_item));
return -EINVAL;
}
if (count > LU_GROUP_NAME_BUF) {
pr_err("ALUA LU Group Alias too large!\n");
return -EINVAL;
}
memset(buf, 0, LU_GROUP_NAME_BUF);
memcpy(buf, page, count);
/*
* Any ALUA logical unit alias besides "NULL" means we will be
* making a new group association.
*/
if (strcmp(strstrip(buf), "NULL")) {
/*
* core_alua_get_lu_gp_by_name() will increment reference to
* struct t10_alua_lu_gp. This reference is released with
* core_alua_get_lu_gp_by_name below().
*/
lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
if (!lu_gp_new)
return -ENODEV;
}
lu_gp_mem = dev->dev_alua_lu_gp_mem;
if (!lu_gp_mem) {
if (lu_gp_new)
core_alua_put_lu_gp_from_name(lu_gp_new);
pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
" pointer\n");
return -EINVAL;
}
spin_lock(&lu_gp_mem->lu_gp_mem_lock);
lu_gp = lu_gp_mem->lu_gp;
if (lu_gp) {
/*
* Clearing an existing lu_gp association, and replacing
* with NULL
*/
if (!lu_gp_new) {
pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
" from ALUA LU Group: core/alua/lu_gps/%s, ID:"
" %hu\n",
config_item_name(&hba->hba_group.cg_item),
config_item_name(&su_dev->se_dev_group.cg_item),
config_item_name(&lu_gp->lu_gp_group.cg_item),
lu_gp->lu_gp_id);
__core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
return count;
}
/*
* Removing existing association of lu_gp_mem with lu_gp
*/
__core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
move = 1;
}
/*
* Associate lu_gp_mem with lu_gp_new.
*/
__core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
" core/alua/lu_gps/%s, ID: %hu\n",
(move) ? "Moving" : "Adding",
config_item_name(&hba->hba_group.cg_item),
config_item_name(&su_dev->se_dev_group.cg_item),
config_item_name(&lu_gp_new->lu_gp_group.cg_item),
lu_gp_new->lu_gp_id);
core_alua_put_lu_gp_from_name(lu_gp_new);
return count;
}
static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
.attr = { .ca_owner = THIS_MODULE,
.ca_name = "alua_lu_gp",
.ca_mode = S_IRUGO | S_IWUSR },
.show = target_core_show_alua_lu_gp,
.store = target_core_store_alua_lu_gp,
};
static struct configfs_attribute *lio_core_dev_attrs[] = {
&target_core_attr_dev_info.attr,
&target_core_attr_dev_control.attr,
&target_core_attr_dev_alias.attr,
&target_core_attr_dev_udev_path.attr,
&target_core_attr_dev_enable.attr,
&target_core_attr_dev_alua_lu_gp.attr,
NULL,
};
static void target_core_dev_release(struct config_item *item)
{
struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
struct se_subsystem_dev, se_dev_group);
struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
struct se_subsystem_api *t = hba->transport;
struct config_group *dev_cg = &se_dev->se_dev_group;
kfree(dev_cg->default_groups);
/*
* This pointer will set when the storage is enabled with:
*`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
*/
if (se_dev->se_dev_ptr) {
pr_debug("Target_Core_ConfigFS: Calling se_free_"
"virtual_device() for se_dev_ptr: %p\n",
se_dev->se_dev_ptr);
se_free_virtual_device(se_dev->se_dev_ptr, hba);
} else {
/*
* Release struct se_subsystem_dev->se_dev_su_ptr..
*/
pr_debug("Target_Core_ConfigFS: Calling t->free_"
"device() for se_dev_su_ptr: %p\n",
se_dev->se_dev_su_ptr);
t->free_device(se_dev->se_dev_su_ptr);
}
pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
"_dev_t: %p\n", se_dev);
kfree(se_dev);
}
static ssize_t target_core_dev_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
struct se_subsystem_dev *se_dev = container_of(
to_config_group(item), struct se_subsystem_dev,
se_dev_group);
struct target_core_configfs_attribute *tc_attr = container_of(
attr, struct target_core_configfs_attribute, attr);
if (!tc_attr->show)
return -EINVAL;
return tc_attr->show(se_dev, page);
}
static ssize_t target_core_dev_store(struct config_item *item,
struct configfs_attribute *attr,
const char *page, size_t count)
{
struct se_subsystem_dev *se_dev = container_of(
to_config_group(item), struct se_subsystem_dev,
se_dev_group);
struct target_core_configfs_attribute *tc_attr = container_of(
attr, struct target_core_configfs_attribute, attr);
if (!tc_attr->store)
return -EINVAL;
return tc_attr->store(se_dev, page, count);
}
static struct configfs_item_operations target_core_dev_item_ops = {
.release = target_core_dev_release,
.show_attribute = target_core_dev_show,
.store_attribute = target_core_dev_store,
};
static struct config_item_type target_core_dev_cit = {
.ct_item_ops = &target_core_dev_item_ops,
.ct_attrs = lio_core_dev_attrs,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_dev_cit */
/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
static struct target_core_alua_lu_gp_attribute \
target_core_alua_lu_gp_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_core_alua_lu_gp_show_attr_##_name, \
target_core_alua_lu_gp_store_attr_##_name);
#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
static struct target_core_alua_lu_gp_attribute \
target_core_alua_lu_gp_##_name = \
__CONFIGFS_EATTR_RO(_name, \
target_core_alua_lu_gp_show_attr_##_name);
/*
* lu_gp_id
*/
static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
struct t10_alua_lu_gp *lu_gp,
char *page)
{
if (!lu_gp->lu_gp_valid_id)
return 0;
return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
}
static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
struct t10_alua_lu_gp *lu_gp,
const char *page,
size_t count)
{
struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
unsigned long lu_gp_id;
int ret;
ret = strict_strtoul(page, 0, &lu_gp_id);
if (ret < 0) {
pr_err("strict_strtoul() returned %d for"
" lu_gp_id\n", ret);
return -EINVAL;
}
if (lu_gp_id > 0x0000ffff) {
pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
" 0x0000ffff\n", lu_gp_id);
return -EINVAL;
}
ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
if (ret < 0)
return -EINVAL;
pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
" Group: core/alua/lu_gps/%s to ID: %hu\n",
config_item_name(&alua_lu_gp_cg->cg_item),
lu_gp->lu_gp_id);
return count;
}
SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
/*
* members
*/
static ssize_t target_core_alua_lu_gp_show_attr_members(
struct t10_alua_lu_gp *lu_gp,
char *page)
{
struct se_device *dev;
struct se_hba *hba;
struct se_subsystem_dev *su_dev;
struct t10_alua_lu_gp_member *lu_gp_mem;
ssize_t len = 0, cur_len;
unsigned char buf[LU_GROUP_NAME_BUF];
memset(buf, 0, LU_GROUP_NAME_BUF);
spin_lock(&lu_gp->lu_gp_lock);
list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
dev = lu_gp_mem->lu_gp_mem_dev;
su_dev = dev->se_sub_dev;
hba = su_dev->se_dev_hba;
cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
config_item_name(&hba->hba_group.cg_item),
config_item_name(&su_dev->se_dev_group.cg_item));
cur_len++; /* Extra byte for NULL terminator */
if ((cur_len + len) > PAGE_SIZE) {
pr_warn("Ran out of lu_gp_show_attr"
"_members buffer\n");
break;
}
memcpy(page+len, buf, cur_len);
len += cur_len;
}
spin_unlock(&lu_gp->lu_gp_lock);
return len;
}
SE_DEV_ALUA_LU_ATTR_RO(members);
CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
&target_core_alua_lu_gp_lu_gp_id.attr,
&target_core_alua_lu_gp_members.attr,
NULL,
};
static void target_core_alua_lu_gp_release(struct config_item *item)
{
struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
struct t10_alua_lu_gp, lu_gp_group);
core_alua_free_lu_gp(lu_gp);
}
static struct configfs_item_operations target_core_alua_lu_gp_ops = {
.release = target_core_alua_lu_gp_release,
.show_attribute = target_core_alua_lu_gp_attr_show,
.store_attribute = target_core_alua_lu_gp_attr_store,
};
static struct config_item_type target_core_alua_lu_gp_cit = {
.ct_item_ops = &target_core_alua_lu_gp_ops,
.ct_attrs = target_core_alua_lu_gp_attrs,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
static struct config_group *target_core_alua_create_lu_gp(
struct config_group *group,
const char *name)
{
struct t10_alua_lu_gp *lu_gp;
struct config_group *alua_lu_gp_cg = NULL;
struct config_item *alua_lu_gp_ci = NULL;
lu_gp = core_alua_allocate_lu_gp(name, 0);
if (IS_ERR(lu_gp))
return NULL;
alua_lu_gp_cg = &lu_gp->lu_gp_group;
alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
config_group_init_type_name(alua_lu_gp_cg, name,
&target_core_alua_lu_gp_cit);
pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
" Group: core/alua/lu_gps/%s\n",
config_item_name(alua_lu_gp_ci));
return alua_lu_gp_cg;
}
static void target_core_alua_drop_lu_gp(
struct config_group *group,
struct config_item *item)
{
struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
struct t10_alua_lu_gp, lu_gp_group);
pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
" Group: core/alua/lu_gps/%s, ID: %hu\n",
config_item_name(item), lu_gp->lu_gp_id);
/*
* core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
* -> target_core_alua_lu_gp_release()
*/
config_item_put(item);
}
static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
.make_group = &target_core_alua_create_lu_gp,
.drop_item = &target_core_alua_drop_lu_gp,
};
static struct config_item_type target_core_alua_lu_gps_cit = {
.ct_item_ops = NULL,
.ct_group_ops = &target_core_alua_lu_gps_group_ops,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
static struct target_core_alua_tg_pt_gp_attribute \
target_core_alua_tg_pt_gp_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_core_alua_tg_pt_gp_show_attr_##_name, \
target_core_alua_tg_pt_gp_store_attr_##_name);
#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
static struct target_core_alua_tg_pt_gp_attribute \
target_core_alua_tg_pt_gp_##_name = \
__CONFIGFS_EATTR_RO(_name, \
target_core_alua_tg_pt_gp_show_attr_##_name);
/*
* alua_access_state
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return sprintf(page, "%d\n",
atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
unsigned long tmp;
int new_state, ret;
if (!tg_pt_gp->tg_pt_gp_valid_id) {
pr_err("Unable to do implict ALUA on non valid"
" tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
return -EINVAL;
}
ret = strict_strtoul(page, 0, &tmp);
if (ret < 0) {
pr_err("Unable to extract new ALUA access state from"
" %s\n", page);
return -EINVAL;
}
new_state = (int)tmp;
if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
pr_err("Unable to process implict configfs ALUA"
" transition while TPGS_IMPLICT_ALUA is disabled\n");
return -EINVAL;
}
ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
NULL, NULL, new_state, 0);
return (!ret) ? count : -EINVAL;
}
SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
/*
* alua_access_status
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return sprintf(page, "%s\n",
core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
unsigned long tmp;
int new_status, ret;
if (!tg_pt_gp->tg_pt_gp_valid_id) {
pr_err("Unable to do set ALUA access status on non"
" valid tg_pt_gp ID: %hu\n",
tg_pt_gp->tg_pt_gp_valid_id);
return -EINVAL;
}
ret = strict_strtoul(page, 0, &tmp);
if (ret < 0) {
pr_err("Unable to extract new ALUA access status"
" from %s\n", page);
return -EINVAL;
}
new_status = (int)tmp;
if ((new_status != ALUA_STATUS_NONE) &&
(new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
(new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
pr_err("Illegal ALUA access status: 0x%02x\n",
new_status);
return -EINVAL;
}
tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
return count;
}
SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
/*
* alua_access_type
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return core_alua_show_access_type(tg_pt_gp, page);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
return core_alua_store_access_type(tg_pt_gp, page, count);
}
SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
/*
* alua_write_metadata
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
unsigned long tmp;
int ret;
ret = strict_strtoul(page, 0, &tmp);
if (ret < 0) {
pr_err("Unable to extract alua_write_metadata\n");
return -EINVAL;
}
if ((tmp != 0) && (tmp != 1)) {
pr_err("Illegal value for alua_write_metadata:"
" %lu\n", tmp);
return -EINVAL;
}
tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
return count;
}
SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
/*
* nonop_delay_msecs
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
}
SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
/*
* trans_delay_msecs
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
}
SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
/*
* implict_trans_secs
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return core_alua_show_implict_trans_secs(tg_pt_gp, page);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
}
SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
/*
* preferred
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
return core_alua_show_preferred_bit(tg_pt_gp, page);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
return core_alua_store_preferred_bit(tg_pt_gp, page, count);
}
SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
/*
* tg_pt_gp_id
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
if (!tg_pt_gp->tg_pt_gp_valid_id)
return 0;
return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
}
static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
struct t10_alua_tg_pt_gp *tg_pt_gp,
const char *page,
size_t count)
{
struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
unsigned long tg_pt_gp_id;
int ret;
ret = strict_strtoul(page, 0, &tg_pt_gp_id);
if (ret < 0) {
pr_err("strict_strtoul() returned %d for"
" tg_pt_gp_id\n", ret);
return -EINVAL;
}
if (tg_pt_gp_id > 0x0000ffff) {
pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
" 0x0000ffff\n", tg_pt_gp_id);
return -EINVAL;
}
ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
if (ret < 0)
return -EINVAL;
pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
"core/alua/tg_pt_gps/%s to ID: %hu\n",
config_item_name(&alua_tg_pt_gp_cg->cg_item),
tg_pt_gp->tg_pt_gp_id);
return count;
}
SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
/*
* members
*/
static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
struct se_port *port;
struct se_portal_group *tpg;
struct se_lun *lun;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
ssize_t len = 0, cur_len;
unsigned char buf[TG_PT_GROUP_NAME_BUF];
memset(buf, 0, TG_PT_GROUP_NAME_BUF);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
tg_pt_gp_mem_list) {
port = tg_pt_gp_mem->tg_pt;
tpg = port->sep_tpg;
lun = port->sep_lun;
cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
"/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_wwn(tpg),
tpg->se_tpg_tfo->tpg_get_tag(tpg),
config_item_name(&lun->lun_group.cg_item));
cur_len++; /* Extra byte for NULL terminator */
if ((cur_len + len) > PAGE_SIZE) {
pr_warn("Ran out of lu_gp_show_attr"
"_members buffer\n");
break;
}
memcpy(page+len, buf, cur_len);
len += cur_len;
}
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
return len;
}
SE_DEV_ALUA_TG_PT_ATTR_RO(members);
CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
tg_pt_gp_group);
static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
&target_core_alua_tg_pt_gp_alua_access_state.attr,
&target_core_alua_tg_pt_gp_alua_access_status.attr,
&target_core_alua_tg_pt_gp_alua_access_type.attr,
&target_core_alua_tg_pt_gp_alua_write_metadata.attr,
&target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
&target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
&target_core_alua_tg_pt_gp_implict_trans_secs.attr,
&target_core_alua_tg_pt_gp_preferred.attr,
&target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
&target_core_alua_tg_pt_gp_members.attr,
NULL,
};
static void target_core_alua_tg_pt_gp_release(struct config_item *item)
{
struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
struct t10_alua_tg_pt_gp, tg_pt_gp_group);
core_alua_free_tg_pt_gp(tg_pt_gp);
}
static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
.release = target_core_alua_tg_pt_gp_release,
.show_attribute = target_core_alua_tg_pt_gp_attr_show,
.store_attribute = target_core_alua_tg_pt_gp_attr_store,
};
static struct config_item_type target_core_alua_tg_pt_gp_cit = {
.ct_item_ops = &target_core_alua_tg_pt_gp_ops,
.ct_attrs = target_core_alua_tg_pt_gp_attrs,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
static struct config_group *target_core_alua_create_tg_pt_gp(
struct config_group *group,
const char *name)
{
struct t10_alua *alua = container_of(group, struct t10_alua,
alua_tg_pt_gps_group);
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
struct config_group *alua_tg_pt_gp_cg = NULL;
struct config_item *alua_tg_pt_gp_ci = NULL;
tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
if (!tg_pt_gp)
return NULL;
alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
config_group_init_type_name(alua_tg_pt_gp_cg, name,
&target_core_alua_tg_pt_gp_cit);
pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
" Group: alua/tg_pt_gps/%s\n",
config_item_name(alua_tg_pt_gp_ci));
return alua_tg_pt_gp_cg;
}
static void target_core_alua_drop_tg_pt_gp(
struct config_group *group,
struct config_item *item)
{
struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
struct t10_alua_tg_pt_gp, tg_pt_gp_group);
pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
" Group: alua/tg_pt_gps/%s, ID: %hu\n",
config_item_name(item), tg_pt_gp->tg_pt_gp_id);
/*
* core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
* -> target_core_alua_tg_pt_gp_release().
*/
config_item_put(item);
}
static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
.make_group = &target_core_alua_create_tg_pt_gp,
.drop_item = &target_core_alua_drop_tg_pt_gp,
};
static struct config_item_type target_core_alua_tg_pt_gps_cit = {
.ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
/* Start functions for struct config_item_type target_core_alua_cit */
/*
* target_core_alua_cit is a ConfigFS group that lives under
* /sys/kernel/config/target/core/alua. There are default groups
* core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
* target_core_alua_cit in target_core_init_configfs() below.
*/
static struct config_item_type target_core_alua_cit = {
.ct_item_ops = NULL,
.ct_attrs = NULL,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_alua_cit */
/* Start functions for struct config_item_type target_core_stat_cit */
static struct config_group *target_core_stat_mkdir(
struct config_group *group,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static void target_core_stat_rmdir(
struct config_group *group,
struct config_item *item)
{
return;
}
static struct configfs_group_operations target_core_stat_group_ops = {
.make_group = &target_core_stat_mkdir,
.drop_item = &target_core_stat_rmdir,
};
static struct config_item_type target_core_stat_cit = {
.ct_group_ops = &target_core_stat_group_ops,
.ct_owner = THIS_MODULE,
};
/* End functions for struct config_item_type target_core_stat_cit */
/* Start functions for struct config_item_type target_core_hba_cit */
static struct config_group *target_core_make_subdev(
struct config_group *group,
const char *name)
{
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct se_subsystem_dev *se_dev;
struct se_subsystem_api *t;
struct config_item *hba_ci = &group->cg_item;
struct se_hba *hba = item_to_hba(hba_ci);
struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
struct config_group *dev_stat_grp = NULL;
int errno = -ENOMEM, ret;
ret = mutex_lock_interruptible(&hba->hba_access_mutex);
if (ret)
return ERR_PTR(ret);
/*
* Locate the struct se_subsystem_api from parent's struct se_hba.
*/
t = hba->transport;
se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
if (!se_dev) {
pr_err("Unable to allocate memory for"
" struct se_subsystem_dev\n");
goto unlock;
}
INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
spin_lock_init(&se_dev->t10_pr.registration_lock);
spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
spin_lock_init(&se_dev->se_dev_lock);
se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
se_dev->t10_wwn.t10_sub_dev = se_dev;
se_dev->t10_alua.t10_sub_dev = se_dev;
se_dev->se_dev_attrib.da_sub_dev = se_dev;
se_dev->se_dev_hba = hba;
dev_cg = &se_dev->se_dev_group;
dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
GFP_KERNEL);
if (!dev_cg->default_groups)
goto out;
/*
* Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
* for ->allocate_virtdevice()
*
* se_dev->se_dev_ptr will be set after ->create_virtdev()
* has been called successfully in the next level up in the
* configfs tree for device object's struct config_group.
*/
se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
if (!se_dev->se_dev_su_ptr) {
pr_err("Unable to locate subsystem dependent pointer"
" from allocate_virtdevice()\n");
goto out;
}
config_group_init_type_name(&se_dev->se_dev_group, name,
&target_core_dev_cit);
config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
&target_core_dev_attrib_cit);
config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
&target_core_dev_pr_cit);
config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
&target_core_dev_wwn_cit);
config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
"alua", &target_core_alua_tg_pt_gps_cit);
config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
"statistics", &target_core_stat_cit);
dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
dev_cg->default_groups[5] = NULL;
/*
* Add core/$HBA/$DEV/alua/default_tg_pt_gp
*/
tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
if (!tg_pt_gp)
goto out;
tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!tg_pt_gp_cg->default_groups) {
pr_err("Unable to allocate tg_pt_gp_cg->"
"default_groups\n");
goto out;
}
config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
"default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
tg_pt_gp_cg->default_groups[1] = NULL;
se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
/*
* Add core/$HBA/$DEV/statistics/ default groups
*/
dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
GFP_KERNEL);
if (!dev_stat_grp->default_groups) {
pr_err("Unable to allocate dev_stat_grp->default_groups\n");
goto out;
}
target_stat_setup_dev_default_groups(se_dev);
pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
" %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
mutex_unlock(&hba->hba_access_mutex);
return &se_dev->se_dev_group;
out:
if (se_dev->t10_alua.default_tg_pt_gp) {
core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
se_dev->t10_alua.default_tg_pt_gp = NULL;
}
if (dev_stat_grp)
kfree(dev_stat_grp->default_groups);
if (tg_pt_gp_cg)
kfree(tg_pt_gp_cg->default_groups);
if (dev_cg)
kfree(dev_cg->default_groups);
if (se_dev->se_dev_su_ptr)
t->free_device(se_dev->se_dev_su_ptr);
kfree(se_dev);
unlock:
mutex_unlock(&hba->hba_access_mutex);
return ERR_PTR(errno);
}
static void target_core_drop_subdev(
struct config_group *group,
struct config_item *item)
{
struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
struct se_subsystem_dev, se_dev_group);
struct se_hba *hba;
struct config_item *df_item;
struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
int i;
hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
mutex_lock(&hba->hba_access_mutex);
dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
for (i = 0; dev_stat_grp->default_groups[i]; i++) {
df_item = &dev_stat_grp->default_groups[i]->cg_item;
dev_stat_grp->default_groups[i] = NULL;
config_item_put(df_item);
}
kfree(dev_stat_grp->default_groups);
tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
tg_pt_gp_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
kfree(tg_pt_gp_cg->default_groups);
/*
* core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
* directly from target_core_alua_tg_pt_gp_release().
*/
se_dev->t10_alua.default_tg_pt_gp = NULL;
dev_cg = &se_dev->se_dev_group;
for (i = 0; dev_cg->default_groups[i]; i++) {
df_item = &dev_cg->default_groups[i]->cg_item;
dev_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
/*
* The releasing of se_dev and associated se_dev->se_dev_ptr is done
* from target_core_dev_item_ops->release() ->target_core_dev_release().
*/
config_item_put(item);
mutex_unlock(&hba->hba_access_mutex);
}
static struct configfs_group_operations target_core_hba_group_ops = {
.make_group = target_core_make_subdev,
.drop_item = target_core_drop_subdev,
};
CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
#define SE_HBA_ATTR(_name, _mode) \
static struct target_core_hba_attribute \
target_core_hba_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_core_hba_show_attr_##_name, \
target_core_hba_store_attr_##_name);
#define SE_HBA_ATTR_RO(_name) \
static struct target_core_hba_attribute \
target_core_hba_##_name = \
__CONFIGFS_EATTR_RO(_name, \
target_core_hba_show_attr_##_name);
static ssize_t target_core_hba_show_attr_hba_info(
struct se_hba *hba,
char *page)
{
return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
hba->hba_id, hba->transport->name,
TARGET_CORE_CONFIGFS_VERSION);
}
SE_HBA_ATTR_RO(hba_info);
static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
char *page)
{
int hba_mode = 0;
if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
hba_mode = 1;
return sprintf(page, "%d\n", hba_mode);
}
static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
const char *page, size_t count)
{
struct se_subsystem_api *transport = hba->transport;
unsigned long mode_flag;
int ret;
if (transport->pmode_enable_hba == NULL)
return -EINVAL;
ret = strict_strtoul(page, 0, &mode_flag);
if (ret < 0) {
pr_err("Unable to extract hba mode flag: %d\n", ret);
return -EINVAL;
}
spin_lock(&hba->device_lock);
if (!list_empty(&hba->hba_dev_list)) {
pr_err("Unable to set hba_mode with active devices\n");
spin_unlock(&hba->device_lock);
return -EINVAL;
}
spin_unlock(&hba->device_lock);
ret = transport->pmode_enable_hba(hba, mode_flag);
if (ret < 0)
return -EINVAL;
if (ret > 0)
hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
else if (ret == 0)
hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
return count;
}
SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
static void target_core_hba_release(struct config_item *item)
{
struct se_hba *hba = container_of(to_config_group(item),
struct se_hba, hba_group);
core_delete_hba(hba);
}
static struct configfs_attribute *target_core_hba_attrs[] = {
&target_core_hba_hba_info.attr,
&target_core_hba_hba_mode.attr,
NULL,
};
static struct configfs_item_operations target_core_hba_item_ops = {
.release = target_core_hba_release,
.show_attribute = target_core_hba_attr_show,
.store_attribute = target_core_hba_attr_store,
};
static struct config_item_type target_core_hba_cit = {
.ct_item_ops = &target_core_hba_item_ops,
.ct_group_ops = &target_core_hba_group_ops,
.ct_attrs = target_core_hba_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_group *target_core_call_addhbatotarget(
struct config_group *group,
const char *name)
{
char *se_plugin_str, *str, *str2;
struct se_hba *hba;
char buf[TARGET_CORE_NAME_MAX_LEN];
unsigned long plugin_dep_id = 0;
int ret;
memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
pr_err("Passed *name strlen(): %d exceeds"
" TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
TARGET_CORE_NAME_MAX_LEN);
return ERR_PTR(-ENAMETOOLONG);
}
snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
str = strstr(buf, "_");
if (!str) {
pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
return ERR_PTR(-EINVAL);
}
se_plugin_str = buf;
/*
* Special case for subsystem plugins that have "_" in their names.
* Namely rd_direct and rd_mcp..
*/
str2 = strstr(str+1, "_");
if (str2) {
*str2 = '\0'; /* Terminate for *se_plugin_str */
str2++; /* Skip to start of plugin dependent ID */
str = str2;
} else {
*str = '\0'; /* Terminate for *se_plugin_str */
str++; /* Skip to start of plugin dependent ID */
}
ret = strict_strtoul(str, 0, &plugin_dep_id);
if (ret < 0) {
pr_err("strict_strtoul() returned %d for"
" plugin_dep_id\n", ret);
return ERR_PTR(-EINVAL);
}
/*
* Load up TCM subsystem plugins if they have not already been loaded.
*/
transport_subsystem_check_init();
hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
if (IS_ERR(hba))
return ERR_CAST(hba);
config_group_init_type_name(&hba->hba_group, name,
&target_core_hba_cit);
return &hba->hba_group;
}
static void target_core_call_delhbafromtarget(
struct config_group *group,
struct config_item *item)
{
/*
* core_delete_hba() is called from target_core_hba_item_ops->release()
* -> target_core_hba_release()
*/
config_item_put(item);
}
static struct configfs_group_operations target_core_group_ops = {
.make_group = target_core_call_addhbatotarget,
.drop_item = target_core_call_delhbafromtarget,
};
static struct config_item_type target_core_cit = {
.ct_item_ops = NULL,
.ct_group_ops = &target_core_group_ops,
.ct_attrs = NULL,
.ct_owner = THIS_MODULE,
};
/* Stop functions for struct config_item_type target_core_hba_cit */
static int __init target_core_init_configfs(void)
{
struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
struct config_group *lu_gp_cg = NULL;
struct configfs_subsystem *subsys;
struct t10_alua_lu_gp *lu_gp;
int ret;
pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
" Engine: %s on %s/%s on "UTS_RELEASE"\n",
TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
subsys = target_core_subsystem[0];
config_group_init(&subsys->su_group);
mutex_init(&subsys->su_mutex);
ret = init_se_kmem_caches();
if (ret < 0)
return ret;
/*
* Create $CONFIGFS/target/core default group for HBA <-> Storage Object
* and ALUA Logical Unit Group and Target Port Group infrastructure.
*/
target_cg = &subsys->su_group;
target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!target_cg->default_groups) {
pr_err("Unable to allocate target_cg->default_groups\n");
goto out_global;
}
config_group_init_type_name(&target_core_hbagroup,
"core", &target_core_cit);
target_cg->default_groups[0] = &target_core_hbagroup;
target_cg->default_groups[1] = NULL;
/*
* Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
*/
hba_cg = &target_core_hbagroup;
hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!hba_cg->default_groups) {
pr_err("Unable to allocate hba_cg->default_groups\n");
goto out_global;
}
config_group_init_type_name(&alua_group,
"alua", &target_core_alua_cit);
hba_cg->default_groups[0] = &alua_group;
hba_cg->default_groups[1] = NULL;
/*
* Add ALUA Logical Unit Group and Target Port Group ConfigFS
* groups under /sys/kernel/config/target/core/alua/
*/
alua_cg = &alua_group;
alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!alua_cg->default_groups) {
pr_err("Unable to allocate alua_cg->default_groups\n");
goto out_global;
}
config_group_init_type_name(&alua_lu_gps_group,
"lu_gps", &target_core_alua_lu_gps_cit);
alua_cg->default_groups[0] = &alua_lu_gps_group;
alua_cg->default_groups[1] = NULL;
/*
* Add core/alua/lu_gps/default_lu_gp
*/
lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
if (IS_ERR(lu_gp))
goto out_global;
lu_gp_cg = &alua_lu_gps_group;
lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!lu_gp_cg->default_groups) {
pr_err("Unable to allocate lu_gp_cg->default_groups\n");
goto out_global;
}
config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
&target_core_alua_lu_gp_cit);
lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
lu_gp_cg->default_groups[1] = NULL;
default_lu_gp = lu_gp;
/*
* Register the target_core_mod subsystem with configfs.
*/
ret = configfs_register_subsystem(subsys);
if (ret < 0) {
pr_err("Error %d while registering subsystem %s\n",
ret, subsys->su_group.cg_item.ci_namebuf);
goto out_global;
}
pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
" Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
" on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
/*
* Register built-in RAMDISK subsystem logic for virtual LUN 0
*/
ret = rd_module_init();
if (ret < 0)
goto out;
if (core_dev_setup_virtual_lun0() < 0)
goto out;
return 0;
out:
configfs_unregister_subsystem(subsys);
core_dev_release_virtual_lun0();
rd_module_exit();
out_global:
if (default_lu_gp) {
core_alua_free_lu_gp(default_lu_gp);
default_lu_gp = NULL;
}
if (lu_gp_cg)
kfree(lu_gp_cg->default_groups);
if (alua_cg)
kfree(alua_cg->default_groups);
if (hba_cg)
kfree(hba_cg->default_groups);
kfree(target_cg->default_groups);
release_se_kmem_caches();
return ret;
}
static void __exit target_core_exit_configfs(void)
{
struct configfs_subsystem *subsys;
struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
struct config_item *item;
int i;
subsys = target_core_subsystem[0];
lu_gp_cg = &alua_lu_gps_group;
for (i = 0; lu_gp_cg->default_groups[i]; i++) {
item = &lu_gp_cg->default_groups[i]->cg_item;
lu_gp_cg->default_groups[i] = NULL;
config_item_put(item);
}
kfree(lu_gp_cg->default_groups);
lu_gp_cg->default_groups = NULL;
alua_cg = &alua_group;
for (i = 0; alua_cg->default_groups[i]; i++) {
item = &alua_cg->default_groups[i]->cg_item;
alua_cg->default_groups[i] = NULL;
config_item_put(item);
}
kfree(alua_cg->default_groups);
alua_cg->default_groups = NULL;
hba_cg = &target_core_hbagroup;
for (i = 0; hba_cg->default_groups[i]; i++) {
item = &hba_cg->default_groups[i]->cg_item;
hba_cg->default_groups[i] = NULL;
config_item_put(item);
}
kfree(hba_cg->default_groups);
hba_cg->default_groups = NULL;
/*
* We expect subsys->su_group.default_groups to be released
* by configfs subsystem provider logic..
*/
configfs_unregister_subsystem(subsys);
kfree(subsys->su_group.default_groups);
core_alua_free_lu_gp(default_lu_gp);
default_lu_gp = NULL;
pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
" Infrastructure\n");
core_dev_release_virtual_lun0();
rd_module_exit();
release_se_kmem_caches();
}
MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
MODULE_AUTHOR("nab@Linux-iSCSI.org");
MODULE_LICENSE("GPL");
module_init(target_core_init_configfs);
module_exit(target_core_exit_configfs);
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