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Subject[PATCH 17/21] target: add initial device backend context target_core_stat.c code
Date
From: Nicholas Bellinger <nab@linux-iscsi.org>

This patch adds a target_core_mib.c statistics conversion for
backend context struct se_subsystem_dev + struct se_device config_group
based statistics in target_core_device.c using CONFIGFS_EATTR()
based struct config_item_types from target_core_stat.c code.

The conversion from backend /proc/scsi_target/mib/ context output to configfs
default groups+attributes include scsi_dev, scsi_lu, and scsi_tgt_dev output
from within individual:

/sys/kernel/config/target/core/$HBA/DEV/

The legacy procfs output now appear as individual configfs attributes under:

*) $HBA/$DEV/statistics/scsi_dev:

|-- indx
|-- inst
|-- ports
`-- role

*) $HBA/$DEV/statistics/scsi_lu:

|-- creation_time
|-- dev
|-- dev_type
|-- full_stat
|-- hs_num_cmds
|-- indx
|-- inst
|-- lu_name
|-- lun
|-- num_cmds
|-- prod
|-- read_mbytes
|-- resets
|-- rev
|-- state_bit
|-- status
|-- vend
`-- write_mbytes

*) $HBA/$DEV/statistics/scsi_tgt_dev:

|-- indx
|-- inst
|-- non_access_lus
|-- num_lus
|-- resets
`-- status

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/Makefile | 3 +-
drivers/target/target_core_configfs.c | 76 ++++-
drivers/target/target_core_stat.c | 684 +++++++++++++++++++++++++++++++++
drivers/target/target_core_stat.h | 6 +
include/target/target_core_base.h | 10 +
5 files changed, 768 insertions(+), 11 deletions(-)
create mode 100644 drivers/target/target_core_stat.c
create mode 100644 drivers/target/target_core_stat.h
diff --git a/drivers/target/Makefile b/drivers/target/Makefile
index 050ee65..4f3cb78 100644
--- a/drivers/target/Makefile
+++ b/drivers/target/Makefile
@@ -12,7 +12,8 @@ target_core_mod-y := target_core_configfs.o \
target_core_transport.o \
target_core_cdb.o \
target_core_ua.o \
- target_core_rd.o
+ target_core_rd.o \
+ target_core_stat.o

obj-$(CONFIG_TARGET_CORE) += target_core_mod.o

diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index a38fec4..a5f44a6 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -3,8 +3,8 @@
*
* This file contains ConfigFS logic for the Generic Target Engine project.
*
- * Copyright (c) 2008-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * Copyright (c) 2008-2011 Rising Tide Systems
+ * Copyright (c) 2008-2011 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
@@ -50,6 +50,7 @@
#include "target_core_hba.h"
#include "target_core_pr.h"
#include "target_core_rd.h"
+#include "target_core_stat.h"

static struct list_head g_tf_list;
static struct mutex g_tf_lock;
@@ -2709,6 +2710,34 @@ static struct config_item_type target_core_alua_cit = {

/* 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(
@@ -2721,10 +2750,12 @@ static struct config_group *target_core_make_subdev(
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;

- if (mutex_lock_interruptible(&hba->hba_access_mutex))
- return NULL;
-
+ 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.
*/
@@ -2754,7 +2785,7 @@ static struct config_group *target_core_make_subdev(
se_dev->se_dev_hba = hba;
dev_cg = &se_dev->se_dev_group;

- dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
+ dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
GFP_KERNEL);
if (!(dev_cg->default_groups))
goto out;
@@ -2786,13 +2817,17 @@ static struct config_group *target_core_make_subdev(
&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] = NULL;
+ dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
+ dev_cg->default_groups[5] = NULL;
/*
- * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
+ * 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))
@@ -2812,6 +2847,17 @@ static struct config_group *target_core_make_subdev(
tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
tg_pt_gp_cg->default_groups[1] = NULL;
T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
+ /*
+ * Add core/$HBA/$DEV/statistics/ default groups
+ */
+ dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
+ dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
+ GFP_KERNEL);
+ if (!dev_stat_grp->default_groups) {
+ printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
+ goto out;
+ }
+ target_stat_setup_dev_default_groups(se_dev);

printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
" %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
@@ -2823,6 +2869,8 @@ out:
core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
T10_ALUA(se_dev)->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)
@@ -2832,7 +2880,7 @@ out:
kfree(se_dev);
unlock:
mutex_unlock(&hba->hba_access_mutex);
- return NULL;
+ return ERR_PTR(errno);
}

static void target_core_drop_subdev(
@@ -2844,7 +2892,7 @@ static void target_core_drop_subdev(
struct se_hba *hba;
struct se_subsystem_api *t;
struct config_item *df_item;
- struct config_group *dev_cg, *tg_pt_gp_cg;
+ 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);
@@ -2856,6 +2904,14 @@ static void target_core_drop_subdev(
list_del(&se_dev->g_se_dev_list);
spin_unlock(&se_global->g_device_lock);

+ dev_stat_grp = &DEV_STAT_GRP(se_dev)->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 = &T10_ALUA(se_dev)->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;
diff --git a/drivers/target/target_core_stat.c b/drivers/target/target_core_stat.c
new file mode 100644
index 0000000..c1428f2
--- /dev/null
+++ b/drivers/target/target_core_stat.c
@@ -0,0 +1,684 @@
+/*******************************************************************************
+ * Filename: target_core_stat.c
+ *
+ * Copyright (c) 2011 Rising Tide Systems
+ * Copyright (c) 2011 Linux-iSCSI.org
+ *
+ * Modern ConfigFS group context specific statistics based on original
+ * target_core_mib.c code
+ *
+ * Copyright (c) 2006-2007 SBE, Inc. All Rights Reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/version.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/blkdev.h>
+#include <linux/configfs.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_hba.h"
+
+#ifndef INITIAL_JIFFIES
+#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
+#endif
+
+#define NONE "None"
+#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
+
+#define SCSI_LU_INDEX 1
+#define LU_COUNT 1
+
+/*
+ * SCSI Device Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_dev, se_dev_stat_grps);
+#define DEV_STAT_SCSI_DEV_ATTR(_name, _mode) \
+static struct target_stat_scsi_dev_attribute \
+ target_stat_scsi_dev_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_dev_show_attr_##_name, \
+ target_stat_scsi_dev_store_attr_##_name);
+
+#define DEV_STAT_SCSI_DEV_ATTR_RO(_name) \
+static struct target_stat_scsi_dev_attribute \
+ target_stat_scsi_dev_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_dev_show_attr_##_name);
+
+static ssize_t target_stat_scsi_dev_show_attr_inst(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_hba *hba = se_subdev->se_dev_hba;
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_dev_show_attr_indx(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_dev_show_attr_role(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "Target\n");
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(role);
+
+static ssize_t target_stat_scsi_dev_show_attr_ports(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_port_count);
+}
+DEV_STAT_SCSI_DEV_ATTR_RO(ports);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_dev, se_dev_stat_grps, scsi_dev_group);
+
+static struct configfs_attribute *target_stat_scsi_dev_attrs[] = {
+ &target_stat_scsi_dev_inst.attr,
+ &target_stat_scsi_dev_indx.attr,
+ &target_stat_scsi_dev_role.attr,
+ &target_stat_scsi_dev_ports.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_dev_attrib_ops = {
+ .show_attribute = target_stat_scsi_dev_attr_show,
+ .store_attribute = target_stat_scsi_dev_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_dev_cit = {
+ .ct_item_ops = &target_stat_scsi_dev_attrib_ops,
+ .ct_attrs = target_stat_scsi_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Target Device Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_tgt_dev, se_dev_stat_grps);
+#define DEV_STAT_SCSI_TGT_DEV_ATTR(_name, _mode) \
+static struct target_stat_scsi_tgt_dev_attribute \
+ target_stat_scsi_tgt_dev_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_tgt_dev_show_attr_##_name, \
+ target_stat_scsi_tgt_dev_store_attr_##_name);
+
+#define DEV_STAT_SCSI_TGT_DEV_ATTR_RO(_name) \
+static struct target_stat_scsi_tgt_dev_attribute \
+ target_stat_scsi_tgt_dev_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_tgt_dev_show_attr_##_name);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_inst(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_hba *hba = se_subdev->se_dev_hba;
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_indx(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_num_lus(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", LU_COUNT);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(num_lus);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_status(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ char status[16];
+
+ if (!dev)
+ return -ENODEV;
+
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ strcpy(status, "activated");
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ strcpy(status, "deactivated");
+ break;
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ strcpy(status, "shutdown");
+ break;
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ strcpy(status, "offline");
+ break;
+ default:
+ sprintf(status, "unknown(%d)", dev->dev_status);
+ break;
+ }
+
+ return snprintf(page, PAGE_SIZE, "%s\n", status);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(status);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_non_access_lus(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int non_accessible_lus;
+
+ if (!dev)
+ return -ENODEV;
+
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ non_accessible_lus = 0;
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ default:
+ non_accessible_lus = 1;
+ break;
+ }
+
+ return snprintf(page, PAGE_SIZE, "%u\n", non_accessible_lus);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(non_access_lus);
+
+static ssize_t target_stat_scsi_tgt_dev_show_attr_resets(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets);
+}
+DEV_STAT_SCSI_TGT_DEV_ATTR_RO(resets);
+
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_tgt_dev, se_dev_stat_grps, scsi_tgt_dev_group);
+
+static struct configfs_attribute *target_stat_scsi_tgt_dev_attrs[] = {
+ &target_stat_scsi_tgt_dev_inst.attr,
+ &target_stat_scsi_tgt_dev_indx.attr,
+ &target_stat_scsi_tgt_dev_num_lus.attr,
+ &target_stat_scsi_tgt_dev_status.attr,
+ &target_stat_scsi_tgt_dev_non_access_lus.attr,
+ &target_stat_scsi_tgt_dev_resets.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_tgt_dev_attrib_ops = {
+ .show_attribute = target_stat_scsi_tgt_dev_attr_show,
+ .store_attribute = target_stat_scsi_tgt_dev_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_tgt_dev_cit = {
+ .ct_item_ops = &target_stat_scsi_tgt_dev_attrib_ops,
+ .ct_attrs = target_stat_scsi_tgt_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * SCSI Logical Unit Table
+ */
+
+CONFIGFS_EATTR_STRUCT(target_stat_scsi_lu, se_dev_stat_grps);
+#define DEV_STAT_SCSI_LU_ATTR(_name, _mode) \
+static struct target_stat_scsi_lu_attribute target_stat_scsi_lu_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_stat_scsi_lu_show_attr_##_name, \
+ target_stat_scsi_lu_store_attr_##_name);
+
+#define DEV_STAT_SCSI_LU_ATTR_RO(_name) \
+static struct target_stat_scsi_lu_attribute target_stat_scsi_lu_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_stat_scsi_lu_show_attr_##_name);
+
+static ssize_t target_stat_scsi_lu_show_attr_inst(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_hba *hba = se_subdev->se_dev_hba;
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(inst);
+
+static ssize_t target_stat_scsi_lu_show_attr_dev(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(dev);
+
+static ssize_t target_stat_scsi_lu_show_attr_indx(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ return snprintf(page, PAGE_SIZE, "%u\n", SCSI_LU_INDEX);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(indx);
+
+static ssize_t target_stat_scsi_lu_show_attr_lun(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+ /* FIXME: scsiLuDefaultLun */
+ return snprintf(page, PAGE_SIZE, "%llu\n", (unsigned long long)0);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(lun);
+
+static ssize_t target_stat_scsi_lu_show_attr_lu_name(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+ /* scsiLuWwnName */
+ return snprintf(page, PAGE_SIZE, "%s\n",
+ (strlen(DEV_T10_WWN(dev)->unit_serial)) ?
+ (char *)&DEV_T10_WWN(dev)->unit_serial[0] : "None");
+}
+DEV_STAT_SCSI_LU_ATTR_RO(lu_name);
+
+static ssize_t target_stat_scsi_lu_show_attr_vend(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int j;
+ char str[28];
+
+ if (!dev)
+ return -ENODEV;
+ /* scsiLuVendorId */
+ memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+ for (j = 0; j < 8; j++)
+ str[j] = ISPRINT(DEV_T10_WWN(dev)->vendor[j]) ?
+ DEV_T10_WWN(dev)->vendor[j] : 0x20;
+ str[8] = 0;
+ return snprintf(page, PAGE_SIZE, "%s\n", str);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(vend);
+
+static ssize_t target_stat_scsi_lu_show_attr_prod(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int j;
+ char str[28];
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuProductId */
+ memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+ for (j = 0; j < 16; j++)
+ str[j] = ISPRINT(DEV_T10_WWN(dev)->model[j]) ?
+ DEV_T10_WWN(dev)->model[j] : 0x20;
+ str[16] = 0;
+ return snprintf(page, PAGE_SIZE, "%s\n", str);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(prod);
+
+static ssize_t target_stat_scsi_lu_show_attr_rev(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+ int j;
+ char str[28];
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuRevisionId */
+ memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+ for (j = 0; j < 4; j++)
+ str[j] = ISPRINT(DEV_T10_WWN(dev)->revision[j]) ?
+ DEV_T10_WWN(dev)->revision[j] : 0x20;
+ str[4] = 0;
+ return snprintf(page, PAGE_SIZE, "%s\n", str);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(rev);
+
+static ssize_t target_stat_scsi_lu_show_attr_dev_type(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuPeripheralType */
+ return snprintf(page, PAGE_SIZE, "%u\n",
+ TRANSPORT(dev)->get_device_type(dev));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(dev_type);
+
+static ssize_t target_stat_scsi_lu_show_attr_status(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuStatus */
+ return snprintf(page, PAGE_SIZE, "%s\n",
+ (dev->dev_status == TRANSPORT_DEVICE_ACTIVATED) ?
+ "available" : "notavailable");
+}
+DEV_STAT_SCSI_LU_ATTR_RO(status);
+
+static ssize_t target_stat_scsi_lu_show_attr_state_bit(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuState */
+ return snprintf(page, PAGE_SIZE, "exposed\n");
+}
+DEV_STAT_SCSI_LU_ATTR_RO(state_bit);
+
+static ssize_t target_stat_scsi_lu_show_attr_num_cmds(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuNumCommands */
+ return snprintf(page, PAGE_SIZE, "%llu\n",
+ (unsigned long long)dev->num_cmds);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(num_cmds);
+
+static ssize_t target_stat_scsi_lu_show_attr_read_mbytes(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuReadMegaBytes */
+ return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->read_bytes >> 20));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(read_mbytes);
+
+static ssize_t target_stat_scsi_lu_show_attr_write_mbytes(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuWrittenMegaBytes */
+ return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->write_bytes >> 20));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(write_mbytes);
+
+static ssize_t target_stat_scsi_lu_show_attr_resets(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuInResets */
+ return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(resets);
+
+static ssize_t target_stat_scsi_lu_show_attr_full_stat(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* FIXME: scsiLuOutTaskSetFullStatus */
+ return snprintf(page, PAGE_SIZE, "%u\n", 0);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(full_stat);
+
+static ssize_t target_stat_scsi_lu_show_attr_hs_num_cmds(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* FIXME: scsiLuHSInCommands */
+ return snprintf(page, PAGE_SIZE, "%u\n", 0);
+}
+DEV_STAT_SCSI_LU_ATTR_RO(hs_num_cmds);
+
+static ssize_t target_stat_scsi_lu_show_attr_creation_time(
+ struct se_dev_stat_grps *sgrps, char *page)
+{
+ struct se_subsystem_dev *se_subdev = container_of(sgrps,
+ struct se_subsystem_dev, dev_stat_grps);
+ struct se_device *dev = se_subdev->se_dev_ptr;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* scsiLuCreationTime */
+ return snprintf(page, PAGE_SIZE, "%u\n", (u32)(((u32)dev->creation_time -
+ INITIAL_JIFFIES) * 100 / HZ));
+}
+DEV_STAT_SCSI_LU_ATTR_RO(creation_time);
+
+CONFIGFS_EATTR_OPS(target_stat_scsi_lu, se_dev_stat_grps, scsi_lu_group);
+
+static struct configfs_attribute *target_stat_scsi_lu_attrs[] = {
+ &target_stat_scsi_lu_inst.attr,
+ &target_stat_scsi_lu_dev.attr,
+ &target_stat_scsi_lu_indx.attr,
+ &target_stat_scsi_lu_lun.attr,
+ &target_stat_scsi_lu_lu_name.attr,
+ &target_stat_scsi_lu_vend.attr,
+ &target_stat_scsi_lu_prod.attr,
+ &target_stat_scsi_lu_rev.attr,
+ &target_stat_scsi_lu_dev_type.attr,
+ &target_stat_scsi_lu_status.attr,
+ &target_stat_scsi_lu_state_bit.attr,
+ &target_stat_scsi_lu_num_cmds.attr,
+ &target_stat_scsi_lu_read_mbytes.attr,
+ &target_stat_scsi_lu_write_mbytes.attr,
+ &target_stat_scsi_lu_resets.attr,
+ &target_stat_scsi_lu_full_stat.attr,
+ &target_stat_scsi_lu_hs_num_cmds.attr,
+ &target_stat_scsi_lu_creation_time.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_stat_scsi_lu_attrib_ops = {
+ .show_attribute = target_stat_scsi_lu_attr_show,
+ .store_attribute = target_stat_scsi_lu_attr_store,
+};
+
+static struct config_item_type target_stat_scsi_lu_cit = {
+ .ct_item_ops = &target_stat_scsi_lu_attrib_ops,
+ .ct_attrs = target_stat_scsi_lu_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/*
+ * Called from target_core_configfs.c:target_core_make_subdev() to setup
+ * the target statistics groups + configfs CITs located in target_core_stat.c
+ */
+void target_stat_setup_dev_default_groups(struct se_subsystem_dev *se_subdev)
+{
+ struct config_group *dev_stat_grp = &DEV_STAT_GRP(se_subdev)->stat_group;
+
+ config_group_init_type_name(&DEV_STAT_GRP(se_subdev)->scsi_dev_group,
+ "scsi_dev", &target_stat_scsi_dev_cit);
+ config_group_init_type_name(&DEV_STAT_GRP(se_subdev)->scsi_tgt_dev_group,
+ "scsi_tgt_dev", &target_stat_scsi_tgt_dev_cit);
+ config_group_init_type_name(&DEV_STAT_GRP(se_subdev)->scsi_lu_group,
+ "scsi_lu", &target_stat_scsi_lu_cit);
+
+ dev_stat_grp->default_groups[0] = &DEV_STAT_GRP(se_subdev)->scsi_dev_group;
+ dev_stat_grp->default_groups[1] = &DEV_STAT_GRP(se_subdev)->scsi_tgt_dev_group;
+ dev_stat_grp->default_groups[2] = &DEV_STAT_GRP(se_subdev)->scsi_lu_group;
+ dev_stat_grp->default_groups[3] = NULL;
+}
diff --git a/drivers/target/target_core_stat.h b/drivers/target/target_core_stat.h
new file mode 100644
index 0000000..015562b
--- /dev/null
+++ b/drivers/target/target_core_stat.h
@@ -0,0 +1,6 @@
+#ifndef TARGET_CORE_STAT_H
+#define TARGET_CORE_STAT_H
+
+extern void target_stat_setup_dev_default_groups(struct se_subsystem_dev *);
+
+#endif /*** TARGET_CORE_STAT_H ***/
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 79f2e0a..9b905ab 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -693,6 +693,13 @@ struct se_dev_attrib {
struct config_group da_group;
} ____cacheline_aligned;

+struct se_dev_stat_grps {
+ struct config_group stat_group;
+ struct config_group scsi_dev_group;
+ struct config_group scsi_tgt_dev_group;
+ struct config_group scsi_lu_group;
+};
+
struct se_subsystem_dev {
/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
#define SE_DEV_ALIAS_LEN 512
@@ -716,11 +723,14 @@ struct se_subsystem_dev {
struct config_group se_dev_group;
/* For T10 Reservations */
struct config_group se_dev_pr_group;
+ /* For target_core_stat.c groups */
+ struct se_dev_stat_grps dev_stat_grps;
} ____cacheline_aligned;

#define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
#define T10_RES(su_dev) (&(su_dev)->t10_reservation)
#define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops)
+#define DEV_STAT_GRP(dev) (&(dev)->dev_stat_grps)

struct se_device {
/* Set to 1 if thread is NOT sleeping on thread_sem */
--
1.7.4.1


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  Last update: 2011-03-14 12:11    [from the cache]
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