linux/drivers/target/target_core_fabric_configfs.c
Andy Grover 6708bb27bb target: Follow up core updates from AGrover and HCH (round 4)
This patch contains the squashed version of forth round series cleanups
from Andy and Christoph following the post heavy lifting in the preceeding:
'Eliminate usage of struct se_mem' and 'Make all control CDBs scatter-gather'
changes.  This also includes a conversion of target core and the v3.0
mainline fabric modules (loopback and tcm_fc) to use pr_debug and the
CONFIG_DYNAMIC_DEBUG infrastructure!

These have been squashed into this third and final round for v3.1.

target: Remove ifdeffed code in t_g_process_write
target: Remove direct ramdisk code
target: Rename task_sg_num to task_sg_nents
target: Remove custom debug macros for pr_debug. Use pr_err().
target: Remove custom debug macros in mainline fabrics
target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0
target: Remove transport do_se_mem_map callback
target: Further simplify transport_free_pages
target: Redo task allocation return value handling
target: Remove extra parentheses
target: change alloc_task call to take *cdb, not *cmd

(nab: Fix bogus struct file assignments in fd_do_readv and fd_do_writev)

Signed-off-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2011-07-22 09:37:48 +00:00

1210 lines
34 KiB
C

/*******************************************************************************
* Filename: target_core_fabric_configfs.c
*
* This file contains generic fabric module configfs infrastructure for
* TCM v4.x code
*
* Copyright (c) 2010,2011 Rising Tide Systems
* Copyright (c) 2010,2011 Linux-iSCSI.org
*
* Copyright (c) Nicholas A. Bellinger <nab@linux-iscsi.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
****************************************************************************/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <generated/utsrelease.h>
#include <linux/utsname.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/unistd.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/configfs.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_tpg.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>
#include "target_core_alua.h"
#include "target_core_hba.h"
#include "target_core_pr.h"
#include "target_core_stat.h"
#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
{ \
struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
struct config_item_type *cit = &tfc->tfc_##_name##_cit; \
\
cit->ct_item_ops = _item_ops; \
cit->ct_group_ops = _group_ops; \
cit->ct_attrs = _attrs; \
cit->ct_owner = tf->tf_module; \
pr_debug("Setup generic %s\n", __stringify(_name)); \
}
/* Start of tfc_tpg_mappedlun_cit */
static int target_fabric_mappedlun_link(
struct config_item *lun_acl_ci,
struct config_item *lun_ci)
{
struct se_dev_entry *deve;
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
struct se_lun_acl, se_lun_group);
struct se_portal_group *se_tpg;
struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
int ret = 0, lun_access;
/*
* Ensure that the source port exists
*/
if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
"_tpg does not exist\n");
return -EINVAL;
}
se_tpg = lun->lun_sep->sep_tpg;
nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
tpg_ci = &nacl_ci->ci_group->cg_item;
wwn_ci = &tpg_ci->ci_group->cg_item;
tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
/*
* Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
*/
if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
pr_err("Illegal Initiator ACL SymLink outside of %s\n",
config_item_name(wwn_ci));
return -EINVAL;
}
if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
pr_err("Illegal Initiator ACL Symlink outside of %s"
" TPGT: %s\n", config_item_name(wwn_ci),
config_item_name(tpg_ci));
return -EINVAL;
}
/*
* If this struct se_node_acl was dynamically generated with
* tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
* which be will write protected (READ-ONLY) when
* tpg_1/attrib/demo_mode_write_protect=1
*/
spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
lun_access = deve->lun_flags;
else
lun_access =
(se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
TRANSPORT_LUNFLAGS_READ_WRITE;
spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
/*
* Determine the actual mapped LUN value user wants..
*
* This value is what the SCSI Initiator actually sees the
* iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
*/
ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
lun->unpacked_lun, lun_access);
return (ret < 0) ? -EINVAL : 0;
}
static int target_fabric_mappedlun_unlink(
struct config_item *lun_acl_ci,
struct config_item *lun_ci)
{
struct se_lun *lun;
struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
struct se_lun_acl, se_lun_group);
struct se_node_acl *nacl = lacl->se_lun_nacl;
struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
struct se_portal_group *se_tpg;
/*
* Determine if the underlying MappedLUN has already been released..
*/
if (!deve->se_lun)
return 0;
lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
se_tpg = lun->lun_sep->sep_tpg;
core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
return 0;
}
CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
#define TCM_MAPPEDLUN_ATTR(_name, _mode) \
static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_fabric_mappedlun_show_##_name, \
target_fabric_mappedlun_store_##_name);
static ssize_t target_fabric_mappedlun_show_write_protect(
struct se_lun_acl *lacl,
char *page)
{
struct se_node_acl *se_nacl = lacl->se_lun_nacl;
struct se_dev_entry *deve;
ssize_t len;
spin_lock_irq(&se_nacl->device_list_lock);
deve = &se_nacl->device_list[lacl->mapped_lun];
len = sprintf(page, "%d\n",
(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
1 : 0);
spin_unlock_irq(&se_nacl->device_list_lock);
return len;
}
static ssize_t target_fabric_mappedlun_store_write_protect(
struct se_lun_acl *lacl,
const char *page,
size_t count)
{
struct se_node_acl *se_nacl = lacl->se_lun_nacl;
struct se_portal_group *se_tpg = se_nacl->se_tpg;
unsigned long op;
if (strict_strtoul(page, 0, &op))
return -EINVAL;
if ((op != 1) && (op != 0))
return -EINVAL;
core_update_device_list_access(lacl->mapped_lun, (op) ?
TRANSPORT_LUNFLAGS_READ_ONLY :
TRANSPORT_LUNFLAGS_READ_WRITE,
lacl->se_lun_nacl);
pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
" Mapped LUN: %u Write Protect bit to %s\n",
se_tpg->se_tpg_tfo->get_fabric_name(),
lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
return count;
}
TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
static void target_fabric_mappedlun_release(struct config_item *item)
{
struct se_lun_acl *lacl = container_of(to_config_group(item),
struct se_lun_acl, se_lun_group);
struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
}
static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
&target_fabric_mappedlun_write_protect.attr,
NULL,
};
static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
.release = target_fabric_mappedlun_release,
.show_attribute = target_fabric_mappedlun_attr_show,
.store_attribute = target_fabric_mappedlun_attr_store,
.allow_link = target_fabric_mappedlun_link,
.drop_link = target_fabric_mappedlun_unlink,
};
TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
target_fabric_mappedlun_attrs);
/* End of tfc_tpg_mappedlun_cit */
/* Start of tfc_tpg_mappedlun_port_cit */
static struct config_group *target_core_mappedlun_stat_mkdir(
struct config_group *group,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static void target_core_mappedlun_stat_rmdir(
struct config_group *group,
struct config_item *item)
{
return;
}
static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
.make_group = target_core_mappedlun_stat_mkdir,
.drop_item = target_core_mappedlun_stat_rmdir,
};
TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
NULL);
/* End of tfc_tpg_mappedlun_port_cit */
/* Start of tfc_tpg_nacl_attrib_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
.show_attribute = target_fabric_nacl_attrib_attr_show,
.store_attribute = target_fabric_nacl_attrib_attr_store,
};
TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
/* End of tfc_tpg_nacl_attrib_cit */
/* Start of tfc_tpg_nacl_auth_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
.show_attribute = target_fabric_nacl_auth_attr_show,
.store_attribute = target_fabric_nacl_auth_attr_store,
};
TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
/* End of tfc_tpg_nacl_auth_cit */
/* Start of tfc_tpg_nacl_param_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
.show_attribute = target_fabric_nacl_param_attr_show,
.store_attribute = target_fabric_nacl_param_attr_store,
};
TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
/* End of tfc_tpg_nacl_param_cit */
/* Start of tfc_tpg_nacl_base_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
static struct config_group *target_fabric_make_mappedlun(
struct config_group *group,
const char *name)
{
struct se_node_acl *se_nacl = container_of(group,
struct se_node_acl, acl_group);
struct se_portal_group *se_tpg = se_nacl->se_tpg;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_lun_acl *lacl;
struct config_item *acl_ci;
struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
char *buf;
unsigned long mapped_lun;
int ret = 0;
acl_ci = &group->cg_item;
if (!acl_ci) {
pr_err("Unable to locatel acl_ci\n");
return NULL;
}
buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
if (!buf) {
pr_err("Unable to allocate memory for name buf\n");
return ERR_PTR(-ENOMEM);
}
snprintf(buf, strlen(name) + 1, "%s", name);
/*
* Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
*/
if (strstr(buf, "lun_") != buf) {
pr_err("Unable to locate \"lun_\" from buf: %s"
" name: %s\n", buf, name);
ret = -EINVAL;
goto out;
}
/*
* Determine the Mapped LUN value. This is what the SCSI Initiator
* Port will actually see.
*/
if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
ret = -EINVAL;
goto out;
}
lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
config_item_name(acl_ci), &ret);
if (!lacl) {
ret = -EINVAL;
goto out;
}
lacl_cg = &lacl->se_lun_group;
lacl_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!lacl_cg->default_groups) {
pr_err("Unable to allocate lacl_cg->default_groups\n");
ret = -ENOMEM;
goto out;
}
config_group_init_type_name(&lacl->se_lun_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
"statistics", &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_stat_cit);
lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
lacl_cg->default_groups[1] = NULL;
ml_stat_grp = &lacl->ml_stat_grps.stat_group;
ml_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
GFP_KERNEL);
if (!ml_stat_grp->default_groups) {
pr_err("Unable to allocate ml_stat_grp->default_groups\n");
ret = -ENOMEM;
goto out;
}
target_stat_setup_mappedlun_default_groups(lacl);
kfree(buf);
return &lacl->se_lun_group;
out:
if (lacl_cg)
kfree(lacl_cg->default_groups);
kfree(buf);
return ERR_PTR(ret);
}
static void target_fabric_drop_mappedlun(
struct config_group *group,
struct config_item *item)
{
struct se_lun_acl *lacl = container_of(to_config_group(item),
struct se_lun_acl, se_lun_group);
struct config_item *df_item;
struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
int i;
ml_stat_grp = &lacl->ml_stat_grps.stat_group;
for (i = 0; ml_stat_grp->default_groups[i]; i++) {
df_item = &ml_stat_grp->default_groups[i]->cg_item;
ml_stat_grp->default_groups[i] = NULL;
config_item_put(df_item);
}
kfree(ml_stat_grp->default_groups);
lacl_cg = &lacl->se_lun_group;
for (i = 0; lacl_cg->default_groups[i]; i++) {
df_item = &lacl_cg->default_groups[i]->cg_item;
lacl_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
kfree(lacl_cg->default_groups);
config_item_put(item);
}
static void target_fabric_nacl_base_release(struct config_item *item)
{
struct se_node_acl *se_nacl = container_of(to_config_group(item),
struct se_node_acl, acl_group);
struct se_portal_group *se_tpg = se_nacl->se_tpg;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
tf->tf_ops.fabric_drop_nodeacl(se_nacl);
}
static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
.release = target_fabric_nacl_base_release,
.show_attribute = target_fabric_nacl_base_attr_show,
.store_attribute = target_fabric_nacl_base_attr_store,
};
static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
.make_group = target_fabric_make_mappedlun,
.drop_item = target_fabric_drop_mappedlun,
};
TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
&target_fabric_nacl_base_group_ops, NULL);
/* End of tfc_tpg_nacl_base_cit */
/* Start of tfc_node_fabric_stats_cit */
/*
* This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
* to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
*/
TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
/* End of tfc_wwn_fabric_stats_cit */
/* Start of tfc_tpg_nacl_cit */
static struct config_group *target_fabric_make_nodeacl(
struct config_group *group,
const char *name)
{
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_acl_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_node_acl *se_nacl;
struct config_group *nacl_cg;
if (!tf->tf_ops.fabric_make_nodeacl) {
pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
return ERR_PTR(-ENOSYS);
}
se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
if (IS_ERR(se_nacl))
return ERR_PTR(PTR_ERR(se_nacl));
nacl_cg = &se_nacl->acl_group;
nacl_cg->default_groups = se_nacl->acl_default_groups;
nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
nacl_cg->default_groups[4] = NULL;
config_group_init_type_name(&se_nacl->acl_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
config_group_init_type_name(&se_nacl->acl_param_group, "param",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
"fabric_statistics",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_stat_cit);
return &se_nacl->acl_group;
}
static void target_fabric_drop_nodeacl(
struct config_group *group,
struct config_item *item)
{
struct se_node_acl *se_nacl = container_of(to_config_group(item),
struct se_node_acl, acl_group);
struct config_item *df_item;
struct config_group *nacl_cg;
int i;
nacl_cg = &se_nacl->acl_group;
for (i = 0; nacl_cg->default_groups[i]; i++) {
df_item = &nacl_cg->default_groups[i]->cg_item;
nacl_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
/*
* struct se_node_acl free is done in target_fabric_nacl_base_release()
*/
config_item_put(item);
}
static struct configfs_group_operations target_fabric_nacl_group_ops = {
.make_group = target_fabric_make_nodeacl,
.drop_item = target_fabric_drop_nodeacl,
};
TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
/* End of tfc_tpg_nacl_cit */
/* Start of tfc_tpg_np_base_cit */
CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
static void target_fabric_np_base_release(struct config_item *item)
{
struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
struct se_tpg_np, tpg_np_group);
struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
tf->tf_ops.fabric_drop_np(se_tpg_np);
}
static struct configfs_item_operations target_fabric_np_base_item_ops = {
.release = target_fabric_np_base_release,
.show_attribute = target_fabric_np_base_attr_show,
.store_attribute = target_fabric_np_base_attr_store,
};
TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
/* End of tfc_tpg_np_base_cit */
/* Start of tfc_tpg_np_cit */
static struct config_group *target_fabric_make_np(
struct config_group *group,
const char *name)
{
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_np_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_tpg_np *se_tpg_np;
if (!tf->tf_ops.fabric_make_np) {
pr_err("tf->tf_ops.fabric_make_np is NULL\n");
return ERR_PTR(-ENOSYS);
}
se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
if (!se_tpg_np || IS_ERR(se_tpg_np))
return ERR_PTR(-EINVAL);
se_tpg_np->tpg_np_parent = se_tpg;
config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
return &se_tpg_np->tpg_np_group;
}
static void target_fabric_drop_np(
struct config_group *group,
struct config_item *item)
{
/*
* struct se_tpg_np is released via target_fabric_np_base_release()
*/
config_item_put(item);
}
static struct configfs_group_operations target_fabric_np_group_ops = {
.make_group = &target_fabric_make_np,
.drop_item = &target_fabric_drop_np,
};
TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
/* End of tfc_tpg_np_cit */
/* Start of tfc_tpg_port_cit */
CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
#define TCM_PORT_ATTR(_name, _mode) \
static struct target_fabric_port_attribute target_fabric_port_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_fabric_port_show_attr_##_name, \
target_fabric_port_store_attr_##_name);
#define TCM_PORT_ATTOR_RO(_name) \
__CONFIGFS_EATTR_RO(_name, \
target_fabric_port_show_attr_##_name);
/*
* alua_tg_pt_gp
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
/*
* alua_tg_pt_offline
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_show_offline_bit(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_store_offline_bit(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
/*
* alua_tg_pt_status
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_show_secondary_status(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_store_secondary_status(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
/*
* alua_tg_pt_write_md
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_show_secondary_write_metadata(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
return -ENODEV;
return core_alua_store_secondary_write_metadata(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
static struct configfs_attribute *target_fabric_port_attrs[] = {
&target_fabric_port_alua_tg_pt_gp.attr,
&target_fabric_port_alua_tg_pt_offline.attr,
&target_fabric_port_alua_tg_pt_status.attr,
&target_fabric_port_alua_tg_pt_write_md.attr,
NULL,
};
CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
static int target_fabric_port_link(
struct config_item *lun_ci,
struct config_item *se_dev_ci)
{
struct config_item *tpg_ci;
struct se_device *dev;
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_lun *lun_p;
struct se_portal_group *se_tpg;
struct se_subsystem_dev *se_dev = container_of(
to_config_group(se_dev_ci), struct se_subsystem_dev,
se_dev_group);
struct target_fabric_configfs *tf;
int ret;
tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
se_tpg = container_of(to_config_group(tpg_ci),
struct se_portal_group, tpg_group);
tf = se_tpg->se_tpg_wwn->wwn_tf;
if (lun->lun_se_dev != NULL) {
pr_err("Port Symlink already exists\n");
return -EEXIST;
}
dev = se_dev->se_dev_ptr;
if (!dev) {
pr_err("Unable to locate struct se_device pointer from"
" %s\n", config_item_name(se_dev_ci));
ret = -ENODEV;
goto out;
}
lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
lun->unpacked_lun);
if (IS_ERR(lun_p) || !lun_p) {
pr_err("core_dev_add_lun() failed\n");
ret = -EINVAL;
goto out;
}
if (tf->tf_ops.fabric_post_link) {
/*
* Call the optional fabric_post_link() to allow a
* fabric module to setup any additional state once
* core_dev_add_lun() has been called..
*/
tf->tf_ops.fabric_post_link(se_tpg, lun);
}
return 0;
out:
return ret;
}
static int target_fabric_port_unlink(
struct config_item *lun_ci,
struct config_item *se_dev_ci)
{
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
if (tf->tf_ops.fabric_pre_unlink) {
/*
* Call the optional fabric_pre_unlink() to allow a
* fabric module to release any additional stat before
* core_dev_del_lun() is called.
*/
tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
}
core_dev_del_lun(se_tpg, lun->unpacked_lun);
return 0;
}
static struct configfs_item_operations target_fabric_port_item_ops = {
.show_attribute = target_fabric_port_attr_show,
.store_attribute = target_fabric_port_attr_store,
.allow_link = target_fabric_port_link,
.drop_link = target_fabric_port_unlink,
};
TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
/* End of tfc_tpg_port_cit */
/* Start of tfc_tpg_port_stat_cit */
static struct config_group *target_core_port_stat_mkdir(
struct config_group *group,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static void target_core_port_stat_rmdir(
struct config_group *group,
struct config_item *item)
{
return;
}
static struct configfs_group_operations target_fabric_port_stat_group_ops = {
.make_group = target_core_port_stat_mkdir,
.drop_item = target_core_port_stat_rmdir,
};
TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
/* End of tfc_tpg_port_stat_cit */
/* Start of tfc_tpg_lun_cit */
static struct config_group *target_fabric_make_lun(
struct config_group *group,
const char *name)
{
struct se_lun *lun;
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_lun_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
unsigned long unpacked_lun;
int errno;
if (strstr(name, "lun_") != name) {
pr_err("Unable to locate \'_\" in"
" \"lun_$LUN_NUMBER\"\n");
return ERR_PTR(-EINVAL);
}
if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
return ERR_PTR(-EINVAL);
lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
if (!lun)
return ERR_PTR(-EINVAL);
lun_cg = &lun->lun_group;
lun_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
GFP_KERNEL);
if (!lun_cg->default_groups) {
pr_err("Unable to allocate lun_cg->default_groups\n");
return ERR_PTR(-ENOMEM);
}
config_group_init_type_name(&lun->lun_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
config_group_init_type_name(&lun->port_stat_grps.stat_group,
"statistics", &TF_CIT_TMPL(tf)->tfc_tpg_port_stat_cit);
lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
lun_cg->default_groups[1] = NULL;
port_stat_grp = &lun->port_stat_grps.stat_group;
port_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
GFP_KERNEL);
if (!port_stat_grp->default_groups) {
pr_err("Unable to allocate port_stat_grp->default_groups\n");
errno = -ENOMEM;
goto out;
}
target_stat_setup_port_default_groups(lun);
return &lun->lun_group;
out:
if (lun_cg)
kfree(lun_cg->default_groups);
return ERR_PTR(errno);
}
static void target_fabric_drop_lun(
struct config_group *group,
struct config_item *item)
{
struct se_lun *lun = container_of(to_config_group(item),
struct se_lun, lun_group);
struct config_item *df_item;
struct config_group *lun_cg, *port_stat_grp;
int i;
port_stat_grp = &lun->port_stat_grps.stat_group;
for (i = 0; port_stat_grp->default_groups[i]; i++) {
df_item = &port_stat_grp->default_groups[i]->cg_item;
port_stat_grp->default_groups[i] = NULL;
config_item_put(df_item);
}
kfree(port_stat_grp->default_groups);
lun_cg = &lun->lun_group;
for (i = 0; lun_cg->default_groups[i]; i++) {
df_item = &lun_cg->default_groups[i]->cg_item;
lun_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
kfree(lun_cg->default_groups);
config_item_put(item);
}
static struct configfs_group_operations target_fabric_lun_group_ops = {
.make_group = &target_fabric_make_lun,
.drop_item = &target_fabric_drop_lun,
};
TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
/* End of tfc_tpg_lun_cit */
/* Start of tfc_tpg_attrib_cit */
CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
.show_attribute = target_fabric_tpg_attrib_attr_show,
.store_attribute = target_fabric_tpg_attrib_attr_store,
};
TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
/* End of tfc_tpg_attrib_cit */
/* Start of tfc_tpg_param_cit */
CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
.show_attribute = target_fabric_tpg_param_attr_show,
.store_attribute = target_fabric_tpg_param_attr_store,
};
TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
/* End of tfc_tpg_param_cit */
/* Start of tfc_tpg_base_cit */
/*
* For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
*/
CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
static void target_fabric_tpg_release(struct config_item *item)
{
struct se_portal_group *se_tpg = container_of(to_config_group(item),
struct se_portal_group, tpg_group);
struct se_wwn *wwn = se_tpg->se_tpg_wwn;
struct target_fabric_configfs *tf = wwn->wwn_tf;
tf->tf_ops.fabric_drop_tpg(se_tpg);
}
static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
.release = target_fabric_tpg_release,
.show_attribute = target_fabric_tpg_attr_show,
.store_attribute = target_fabric_tpg_attr_store,
};
TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
/* End of tfc_tpg_base_cit */
/* Start of tfc_tpg_cit */
static struct config_group *target_fabric_make_tpg(
struct config_group *group,
const char *name)
{
struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
struct target_fabric_configfs *tf = wwn->wwn_tf;
struct se_portal_group *se_tpg;
if (!tf->tf_ops.fabric_make_tpg) {
pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
return ERR_PTR(-ENOSYS);
}
se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
if (!se_tpg || IS_ERR(se_tpg))
return ERR_PTR(-EINVAL);
/*
* Setup default groups from pre-allocated se_tpg->tpg_default_groups
*/
se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
se_tpg->tpg_group.default_groups[5] = NULL;
config_group_init_type_name(&se_tpg->tpg_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
&TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
config_group_init_type_name(&se_tpg->tpg_np_group, "np",
&TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
&TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
config_group_init_type_name(&se_tpg->tpg_param_group, "param",
&TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
return &se_tpg->tpg_group;
}
static void target_fabric_drop_tpg(
struct config_group *group,
struct config_item *item)
{
struct se_portal_group *se_tpg = container_of(to_config_group(item),
struct se_portal_group, tpg_group);
struct config_group *tpg_cg = &se_tpg->tpg_group;
struct config_item *df_item;
int i;
/*
* Release default groups, but do not release tpg_cg->default_groups
* memory as it is statically allocated at se_tpg->tpg_default_groups.
*/
for (i = 0; tpg_cg->default_groups[i]; i++) {
df_item = &tpg_cg->default_groups[i]->cg_item;
tpg_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
config_item_put(item);
}
static void target_fabric_release_wwn(struct config_item *item)
{
struct se_wwn *wwn = container_of(to_config_group(item),
struct se_wwn, wwn_group);
struct target_fabric_configfs *tf = wwn->wwn_tf;
tf->tf_ops.fabric_drop_wwn(wwn);
}
static struct configfs_item_operations target_fabric_tpg_item_ops = {
.release = target_fabric_release_wwn,
};
static struct configfs_group_operations target_fabric_tpg_group_ops = {
.make_group = target_fabric_make_tpg,
.drop_item = target_fabric_drop_tpg,
};
TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
NULL);
/* End of tfc_tpg_cit */
/* Start of tfc_wwn_fabric_stats_cit */
/*
* This is used as a placeholder for struct se_wwn->fabric_stat_group
* to allow fabrics access to ->fabric_stat_group->default_groups[]
*/
TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
/* End of tfc_wwn_fabric_stats_cit */
/* Start of tfc_wwn_cit */
static struct config_group *target_fabric_make_wwn(
struct config_group *group,
const char *name)
{
struct target_fabric_configfs *tf = container_of(group,
struct target_fabric_configfs, tf_group);
struct se_wwn *wwn;
if (!tf->tf_ops.fabric_make_wwn) {
pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
return ERR_PTR(-ENOSYS);
}
wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
if (!wwn || IS_ERR(wwn))
return ERR_PTR(-EINVAL);
wwn->wwn_tf = tf;
/*
* Setup default groups from pre-allocated wwn->wwn_default_groups
*/
wwn->wwn_group.default_groups = wwn->wwn_default_groups;
wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
wwn->wwn_group.default_groups[1] = NULL;
config_group_init_type_name(&wwn->wwn_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_cit);
config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
&TF_CIT_TMPL(tf)->tfc_wwn_fabric_stats_cit);
return &wwn->wwn_group;
}
static void target_fabric_drop_wwn(
struct config_group *group,
struct config_item *item)
{
struct se_wwn *wwn = container_of(to_config_group(item),
struct se_wwn, wwn_group);
struct config_item *df_item;
struct config_group *cg = &wwn->wwn_group;
int i;
for (i = 0; cg->default_groups[i]; i++) {
df_item = &cg->default_groups[i]->cg_item;
cg->default_groups[i] = NULL;
config_item_put(df_item);
}
config_item_put(item);
}
static struct configfs_group_operations target_fabric_wwn_group_ops = {
.make_group = target_fabric_make_wwn,
.drop_item = target_fabric_drop_wwn,
};
/*
* For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
*/
CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
static struct configfs_item_operations target_fabric_wwn_item_ops = {
.show_attribute = target_fabric_wwn_attr_show,
.store_attribute = target_fabric_wwn_attr_store,
};
TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
/* End of tfc_wwn_cit */
/* Start of tfc_discovery_cit */
CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
tf_disc_group);
static struct configfs_item_operations target_fabric_discovery_item_ops = {
.show_attribute = target_fabric_discovery_attr_show,
.store_attribute = target_fabric_discovery_attr_store,
};
TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
/* End of tfc_discovery_cit */
int target_fabric_setup_cits(struct target_fabric_configfs *tf)
{
target_fabric_setup_discovery_cit(tf);
target_fabric_setup_wwn_cit(tf);
target_fabric_setup_wwn_fabric_stats_cit(tf);
target_fabric_setup_tpg_cit(tf);
target_fabric_setup_tpg_base_cit(tf);
target_fabric_setup_tpg_port_cit(tf);
target_fabric_setup_tpg_port_stat_cit(tf);
target_fabric_setup_tpg_lun_cit(tf);
target_fabric_setup_tpg_np_cit(tf);
target_fabric_setup_tpg_np_base_cit(tf);
target_fabric_setup_tpg_attrib_cit(tf);
target_fabric_setup_tpg_param_cit(tf);
target_fabric_setup_tpg_nacl_cit(tf);
target_fabric_setup_tpg_nacl_base_cit(tf);
target_fabric_setup_tpg_nacl_attrib_cit(tf);
target_fabric_setup_tpg_nacl_auth_cit(tf);
target_fabric_setup_tpg_nacl_param_cit(tf);
target_fabric_setup_tpg_nacl_stat_cit(tf);
target_fabric_setup_tpg_mappedlun_cit(tf);
target_fabric_setup_tpg_mappedlun_stat_cit(tf);
return 0;
}