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target_core_configfs.c
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target_core_configfs.c
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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 <[email protected]>
*
* 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,