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linux/drivers/target/target_core_configfs.c
Peter Senna Tschudin 37bb7899ca target: fix return code in target_core_init_configfs error path 
This patch fixes error cases within target_core_init_configfs() to
properly set ret = -ENOMEM before jumping to the out_global exception
path.

This was originally discovered with the following Coccinelle semantic
match information:

Convert a nonnegative error return code to a negative one, as returned
elsewhere in the function.  A simplified version of the semantic match
that finds this problem is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-09-17 18:09:56 -07:00

3293 lines
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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;
}
/*
* 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"
" Identifier 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");
ret = -ENOMEM;
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");
ret = -ENOMEM;
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");
ret = -ENOMEM;
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)) {
ret = -ENOMEM;
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");
ret = -ENOMEM;
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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