Date:	Mon, 30 Aug 2010 02:22:15 -0700
From:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To:	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Mike Christie <michaelc@...wisc.edu>,
	Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
	James Bottomley <James.Bottomley@...e.de>,
	Jens Axboe <axboe@...nel.dk>,
	Boaz Harrosh <bharrosh@...asas.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [RFC 14/22] tcm: Add SCSI MIB statistics support

From: Nicholas Bellinger <nab@...ux-iscsi.org>

This patch adds support for read-only SCSI MIBs through /proc/scsi_target/mib
following RFC-4455.

Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
 drivers/target/target_core_mib.c | 1063 ++++++++++++++++++++++++++++++++++++++
 drivers/target/target_core_mib.h |   31 ++
 2 files changed, 1094 insertions(+), 0 deletions(-)
 create mode 100644 drivers/target/target_core_mib.c
 create mode 100644 drivers/target/target_core_mib.h

diff --git a/drivers/target/target_core_mib.c b/drivers/target/target_core_mib.c
new file mode 100644
index 0000000..a2e1fdc
--- /dev/null
+++ b/drivers/target/target_core_mib.c
@@ -0,0 +1,1063 @@
+/*******************************************************************************
+ * Filename:  target_core_mib.c
+ *
+ * Copyright (c) 2006-2007 SBE, Inc.  All Rights Reserved.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@...ux-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 <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_core_hba.h"
+#include "target_core_mib.h"
+
+/* SCSI mib table index */
+struct scsi_index_table scsi_index_table;
+
+#ifndef INITIAL_JIFFIES
+#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
+#endif
+
+/* SCSI Instance Table */
+#define SCSI_INST_SW_INDEX		1
+#define SCSI_TRANSPORT_INDEX		1
+
+#define NONE		"None"
+#define ISPRINT(a)   ((a >= ' ') && (a <= '~'))
+
+static inline int list_is_first(const struct list_head *list,
+				const struct list_head *head)
+{
+	return list->prev == head;
+}
+
+static void *locate_hba_start(
+	struct seq_file *seq,
+	loff_t *pos)
+{
+	spin_lock(&se_global->g_device_lock);
+	return seq_list_start(&se_global->g_se_dev_list, *pos);
+}
+
+static void *locate_hba_next(
+	struct seq_file *seq,
+	void *v,
+	loff_t *pos)
+{
+	return seq_list_next(v, &se_global->g_se_dev_list, pos);
+}
+
+static void locate_hba_stop(struct seq_file *seq, void *v)
+{
+	spin_unlock(&se_global->g_device_lock);
+}
+
+/****************************************************************************
+ * SCSI MIB Tables
+ ****************************************************************************/
+
+/*
+ * SCSI Instance Table
+ */
+static void *scsi_inst_seq_start(
+	struct seq_file *seq,
+	loff_t *pos)
+{
+	spin_lock(&se_global->hba_lock);
+	return seq_list_start(&se_global->g_hba_list, *pos);
+}
+
+static void *scsi_inst_seq_next(
+	struct seq_file *seq,
+	void *v,
+	loff_t *pos)
+{
+	return seq_list_next(v, &se_global->g_hba_list, pos);
+}
+
+static void scsi_inst_seq_stop(struct seq_file *seq, void *v)
+{
+	spin_unlock(&se_global->hba_lock);
+}
+
+static int scsi_inst_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba = list_entry(v, struct se_hba, hba_list);
+
+	if (list_is_first(&hba->hba_list, &se_global->g_hba_list))
+		seq_puts(seq, "inst sw_indx\n");
+
+	if (!(hba->hba_status & HBA_STATUS_ACTIVE))
+		return 0;
+
+	seq_printf(seq, "%u %u\n", hba->hba_index, SCSI_INST_SW_INDEX);
+	seq_printf(seq, "plugin: %s version: %s\n",
+			hba->transport->name, TARGET_CORE_VERSION);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_inst_seq_ops = {
+	.start	= scsi_inst_seq_start,
+	.next	= scsi_inst_seq_next,
+	.stop	= scsi_inst_seq_stop,
+	.show	= scsi_inst_seq_show
+};
+
+static int scsi_inst_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_inst_seq_ops);
+}
+
+static const struct file_operations scsi_inst_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_inst_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Device Table
+ */
+static void *scsi_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	return locate_hba_start(seq, pos);
+}
+
+static void *scsi_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_dev_seq_stop(struct seq_file *seq, void *v)
+{
+	locate_hba_stop(seq, v);
+}
+
+static int scsi_dev_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba;
+	struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+						g_se_dev_list);
+	struct se_device *dev = se_dev->se_dev_ptr;
+	char str[28];
+	int k;
+
+	if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+		seq_puts(seq, "inst indx role ports\n");
+
+	if (!(dev))
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		/* Log error ? */
+		return 0;
+	}
+
+	seq_printf(seq, "%u %u %s %u\n", hba->hba_index,
+		   dev->dev_index, "Target", dev->dev_port_count);
+
+	memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+
+	/* vendor */
+	for (k = 0; k < 8; k++)
+		str[k] = ISPRINT(DEV_T10_WWN(dev)->vendor[k]) ?
+				DEV_T10_WWN(dev)->vendor[k] : 0x20;
+	str[k] = 0x20;
+
+	/* model */
+	for (k = 0; k < 16; k++)
+		str[k+9] = ISPRINT(DEV_T10_WWN(dev)->model[k]) ?
+				DEV_T10_WWN(dev)->model[k] : 0x20;
+	str[k + 9] = 0;
+
+	seq_printf(seq, "dev_alias: %s\n", str);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_dev_seq_ops = {
+	.start  = scsi_dev_seq_start,
+	.next   = scsi_dev_seq_next,
+	.stop   = scsi_dev_seq_stop,
+	.show   = scsi_dev_seq_show
+};
+
+static int scsi_dev_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_dev_seq_ops);
+}
+
+static const struct file_operations scsi_dev_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_dev_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Port Table
+ */
+static void *scsi_port_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	return locate_hba_start(seq, pos);
+}
+
+static void *scsi_port_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_port_seq_stop(struct seq_file *seq, void *v)
+{
+	locate_hba_stop(seq, v);
+}
+
+static int scsi_port_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba;
+	struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+						g_se_dev_list);
+	struct se_device *dev = se_dev->se_dev_ptr;
+	struct se_port *sep, *sep_tmp;
+
+	if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+		seq_puts(seq, "inst device indx role busy_count\n");
+
+	if (!(dev))
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		/* Log error ? */
+		return 0;
+	}
+
+	/* FIXME: scsiPortBusyStatuses count */
+	spin_lock(&dev->se_port_lock);
+	list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
+		seq_printf(seq, "%u %u %u %s%u %u\n", hba->hba_index,
+			dev->dev_index, sep->sep_index, "Device",
+			dev->dev_index, 0);
+	}
+	spin_unlock(&dev->se_port_lock);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_port_seq_ops = {
+	.start  = scsi_port_seq_start,
+	.next   = scsi_port_seq_next,
+	.stop   = scsi_port_seq_stop,
+	.show   = scsi_port_seq_show
+};
+
+static int scsi_port_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_port_seq_ops);
+}
+
+static const struct file_operations scsi_port_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_port_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Transport Table
+ */
+static void *scsi_transport_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	return locate_hba_start(seq, pos);
+}
+
+static void *scsi_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_transport_seq_stop(struct seq_file *seq, void *v)
+{
+	locate_hba_stop(seq, v);
+}
+
+static int scsi_transport_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba;
+	struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+						g_se_dev_list);
+	struct se_device *dev = se_dev->se_dev_ptr;
+	struct se_port *se, *se_tmp;
+	struct se_portal_group *tpg;
+	struct t10_wwn *wwn;
+	char buf[64];
+
+	if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+		seq_puts(seq, "inst device indx dev_name\n");
+
+	if (!(dev))
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		/* Log error ? */
+		return 0;
+	}
+
+	wwn = DEV_T10_WWN(dev);
+
+	spin_lock(&dev->se_port_lock);
+	list_for_each_entry_safe(se, se_tmp, &dev->dev_sep_list, sep_list) {
+		tpg = se->sep_tpg;
+		sprintf(buf, "scsiTransport%s",
+				TPG_TFO(tpg)->get_fabric_name());
+
+		seq_printf(seq, "%u %s %u %s+%s\n",
+			hba->hba_index, /* scsiTransportIndex */
+			buf,  /* scsiTransportType */
+			(TPG_TFO(tpg)->tpg_get_inst_index != NULL) ?
+			TPG_TFO(tpg)->tpg_get_inst_index(tpg) :
+			0,
+			TPG_TFO(tpg)->tpg_get_wwn(tpg),
+			(strlen(wwn->unit_serial)) ?
+			/* scsiTransportDevName */
+			wwn->unit_serial : wwn->vendor);
+	}
+	spin_unlock(&dev->se_port_lock);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_transport_seq_ops = {
+	.start  = scsi_transport_seq_start,
+	.next   = scsi_transport_seq_next,
+	.stop   = scsi_transport_seq_stop,
+	.show   = scsi_transport_seq_show
+};
+
+static int scsi_transport_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_transport_seq_ops);
+}
+
+static const struct file_operations scsi_transport_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_transport_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Target Device Table
+ */
+static void *scsi_tgt_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	return locate_hba_start(seq, pos);
+}
+
+static void *scsi_tgt_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_tgt_dev_seq_stop(struct seq_file *seq, void *v)
+{
+	locate_hba_stop(seq, v);
+}
+
+
+#define LU_COUNT	1  /* for now */
+static int scsi_tgt_dev_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba;
+	struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+						g_se_dev_list);
+	struct se_device *dev = se_dev->se_dev_ptr;
+	int non_accessible_lus = 0;
+	char status[16];
+
+	if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+		seq_puts(seq, "inst indx num_LUs status non_access_LUs"
+			" resets\n");
+
+	if (!(dev))
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		/* Log error ? */
+		return 0;
+	}
+
+	switch (dev->dev_status) {
+	case TRANSPORT_DEVICE_ACTIVATED:
+		strcpy(status, "activated");
+		break;
+	case TRANSPORT_DEVICE_DEACTIVATED:
+		strcpy(status, "deactivated");
+		non_accessible_lus = 1;
+		break;
+	case TRANSPORT_DEVICE_SHUTDOWN:
+		strcpy(status, "shutdown");
+		non_accessible_lus = 1;
+		break;
+	case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+	case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+		strcpy(status, "offline");
+		non_accessible_lus = 1;
+		break;
+	default:
+		sprintf(status, "unknown(%d)", dev->dev_status);
+		non_accessible_lus = 1;
+	}
+
+	seq_printf(seq, "%u %u %u %s %u %u\n",
+		   hba->hba_index, dev->dev_index, LU_COUNT,
+		   status, non_accessible_lus, dev->num_resets);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_tgt_dev_seq_ops = {
+	.start  = scsi_tgt_dev_seq_start,
+	.next   = scsi_tgt_dev_seq_next,
+	.stop   = scsi_tgt_dev_seq_stop,
+	.show   = scsi_tgt_dev_seq_show
+};
+
+static int scsi_tgt_dev_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_tgt_dev_seq_ops);
+}
+
+static const struct file_operations scsi_tgt_dev_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_tgt_dev_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Target Port Table
+ */
+static void *scsi_tgt_port_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	return locate_hba_start(seq, pos);
+}
+
+static void *scsi_tgt_port_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_tgt_port_seq_stop(struct seq_file *seq, void *v)
+{
+	locate_hba_stop(seq, v);
+}
+
+static int scsi_tgt_port_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba;
+	struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+						g_se_dev_list);
+	struct se_device *dev = se_dev->se_dev_ptr;
+	struct se_port *sep, *sep_tmp;
+	struct se_portal_group *tpg;
+	u32 rx_mbytes, tx_mbytes;
+	unsigned long long num_cmds;
+	char buf[64];
+
+	if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+		seq_puts(seq, "inst device indx name port_index in_cmds"
+			" write_mbytes read_mbytes hs_in_cmds\n");
+
+	if (!(dev))
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		/* Log error ? */
+		return 0;
+	}
+
+	spin_lock(&dev->se_port_lock);
+	list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
+		tpg = sep->sep_tpg;
+		sprintf(buf, "%sPort#",
+			TPG_TFO(tpg)->get_fabric_name());
+
+		seq_printf(seq, "%u %u %u %s%d %s%s%d ",
+		     hba->hba_index,
+		     dev->dev_index,
+		     sep->sep_index,
+		     buf, sep->sep_index,
+		     TPG_TFO(tpg)->tpg_get_wwn(tpg), "+t+",
+		     TPG_TFO(tpg)->tpg_get_tag(tpg));
+
+		spin_lock(&sep->sep_lun->lun_sep_lock);
+		num_cmds = sep->sep_stats.cmd_pdus;
+		rx_mbytes = (sep->sep_stats.rx_data_octets >> 20);
+		tx_mbytes = (sep->sep_stats.tx_data_octets >> 20);
+		spin_unlock(&sep->sep_lun->lun_sep_lock);
+
+		seq_printf(seq, "%llu %u %u %u\n", num_cmds,
+			rx_mbytes, tx_mbytes, 0);
+	}
+	spin_unlock(&dev->se_port_lock);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_tgt_port_seq_ops = {
+	.start  = scsi_tgt_port_seq_start,
+	.next   = scsi_tgt_port_seq_next,
+	.stop   = scsi_tgt_port_seq_stop,
+	.show   = scsi_tgt_port_seq_show
+};
+
+static int scsi_tgt_port_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_tgt_port_seq_ops);
+}
+
+static const struct file_operations scsi_tgt_port_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_tgt_port_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Authorized Initiator Table:
+ * It contains the SCSI Initiators authorized to be attached to one of the
+ * local Target ports.
+ * Iterates through all active TPGs and extracts the info from the ACLs
+ */
+static void *scsi_auth_intr_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	spin_lock_bh(&se_global->se_tpg_lock);
+	return seq_list_start(&se_global->g_se_tpg_list, *pos);
+}
+
+static void *scsi_auth_intr_seq_next(struct seq_file *seq, void *v,
+					 loff_t *pos)
+{
+	return seq_list_next(v, &se_global->g_se_tpg_list, pos);
+}
+
+static void scsi_auth_intr_seq_stop(struct seq_file *seq, void *v)
+{
+	spin_unlock_bh(&se_global->se_tpg_lock);
+}
+
+static int scsi_auth_intr_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_portal_group *se_tpg = list_entry(v, struct se_portal_group,
+						se_tpg_list);
+	struct se_dev_entry *deve;
+	struct se_lun *lun;
+	struct se_node_acl *se_nacl;
+	int j;
+
+	if (list_is_first(&se_tpg->se_tpg_list,
+			  &se_global->g_se_tpg_list))
+		seq_puts(seq, "inst dev port indx dev_or_port intr_name "
+			 "map_indx att_count num_cmds read_mbytes "
+			 "write_mbytes hs_num_cmds creation_time row_status\n");
+
+	if (!(se_tpg))
+		return 0;
+
+	spin_lock(&se_tpg->acl_node_lock);
+	list_for_each_entry(se_nacl, &se_tpg->acl_node_list, acl_list) {
+		spin_lock(&se_nacl->device_list_lock);
+		for (j = 0; j < TRANSPORT_MAX_LUNS_PER_TPG; j++) {
+			deve = &se_nacl->device_list[j];
+			if (!(deve->lun_flags &
+					TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) ||
+			    (!deve->se_lun))
+				continue;
+			lun = deve->se_lun;
+			if ((lun->lun_type != TRANSPORT_LUN_TYPE_DEVICE) ||
+			    (!lun->lun_se_dev))
+				continue;
+
+			seq_printf(seq, "%u %u %u %u %u %s %u %u %u %u %u %u"
+					" %u %s\n",
+				/* scsiInstIndex */
+				(TPG_TFO(se_tpg)->tpg_get_inst_index != NULL) ?
+				TPG_TFO(se_tpg)->tpg_get_inst_index(se_tpg) :
+				0,
+				/* scsiDeviceIndex */
+				lun->lun_se_dev->dev_index,
+				/* scsiAuthIntrTgtPortIndex */
+				TPG_TFO(se_tpg)->tpg_get_tag(se_tpg),
+				/* scsiAuthIntrIndex */
+				se_nacl->acl_index,
+				/* scsiAuthIntrDevOrPort */
+				1,
+				/* scsiAuthIntrName */
+				se_nacl->initiatorname[0] ?
+					se_nacl->initiatorname : NONE,
+				/* FIXME: scsiAuthIntrLunMapIndex */
+				0,
+				/* scsiAuthIntrAttachedTimes */
+				deve->attach_count,
+				/* scsiAuthIntrOutCommands */
+				deve->total_cmds,
+				/* scsiAuthIntrReadMegaBytes */
+				(u32)(deve->read_bytes >> 20),
+				/* scsiAuthIntrWrittenMegaBytes */
+				(u32)(deve->write_bytes >> 20),
+				/* FIXME: scsiAuthIntrHSOutCommands */
+				0,
+				/* scsiAuthIntrLastCreation */
+				(u32)(((u32)deve->creation_time -
+					    INITIAL_JIFFIES) * 100 / HZ),
+				/* FIXME: scsiAuthIntrRowStatus */
+				"Ready");
+		}
+		spin_unlock(&se_nacl->device_list_lock);
+	}
+	spin_unlock(&se_tpg->acl_node_lock);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_auth_intr_seq_ops = {
+	.start	= scsi_auth_intr_seq_start,
+	.next	= scsi_auth_intr_seq_next,
+	.stop	= scsi_auth_intr_seq_stop,
+	.show	= scsi_auth_intr_seq_show
+};
+
+static int scsi_auth_intr_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_auth_intr_seq_ops);
+}
+
+static const struct file_operations scsi_auth_intr_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_auth_intr_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Attached Initiator Port Table:
+ * It lists the SCSI Initiators attached to one of the local Target ports.
+ * Iterates through all active TPGs and use active sessions from each TPG
+ * to list the info fo this table.
+ */
+static void *scsi_att_intr_port_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	spin_lock_bh(&se_global->se_tpg_lock);
+	return seq_list_start(&se_global->g_se_tpg_list, *pos);
+}
+
+static void *scsi_att_intr_port_seq_next(struct seq_file *seq, void *v,
+					 loff_t *pos)
+{
+	return seq_list_next(v, &se_global->g_se_tpg_list, pos);
+}
+
+static void scsi_att_intr_port_seq_stop(struct seq_file *seq, void *v)
+{
+	spin_unlock_bh(&se_global->se_tpg_lock);
+}
+
+static int scsi_att_intr_port_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_portal_group *se_tpg = list_entry(v, struct se_portal_group,
+						se_tpg_list);
+	struct se_dev_entry *deve;
+	struct se_lun *lun;
+	struct se_node_acl *se_nacl;
+	struct se_session *se_sess;
+	unsigned char buf[64];
+	int j;
+
+	if (list_is_first(&se_tpg->se_tpg_list,
+			  &se_global->g_se_tpg_list))
+		seq_puts(seq, "inst dev port indx port_auth_indx port_name"
+			" port_ident\n");
+
+	if (!(se_tpg))
+		return 0;
+
+	spin_lock(&se_tpg->session_lock);
+	list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) {
+		if ((TPG_TFO(se_tpg)->sess_logged_in(se_sess)) ||
+		    (!se_sess->se_node_acl) ||
+		    (!se_sess->se_node_acl->device_list))
+			continue;
+
+		se_nacl = se_sess->se_node_acl;
+
+		spin_lock(&se_nacl->device_list_lock);
+		for (j = 0; j < TRANSPORT_MAX_LUNS_PER_TPG; j++) {
+			deve = &se_nacl->device_list[j];
+			if (!(deve->lun_flags &
+					TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) ||
+			   (!deve->se_lun))
+				continue;
+
+			lun = deve->se_lun;
+			if ((lun->lun_type != TRANSPORT_LUN_TYPE_DEVICE) ||
+			    (!lun->lun_se_dev))
+				continue;
+
+			memset(buf, 0, 64);
+			if (TPG_TFO(se_tpg)->sess_get_initiator_sid != NULL)
+				TPG_TFO(se_tpg)->sess_get_initiator_sid(
+					se_sess, (unsigned char *)&buf[0], 64);
+
+			seq_printf(seq, "%u %u %u %u %u %s+i+%s\n",
+				/* scsiInstIndex */
+				(TPG_TFO(se_tpg)->tpg_get_inst_index != NULL) ?
+				TPG_TFO(se_tpg)->tpg_get_inst_index(se_tpg) :
+				0,
+				/* scsiDeviceIndex */
+				lun->lun_se_dev->dev_index,
+				/* scsiPortIndex */
+				TPG_TFO(se_tpg)->tpg_get_tag(se_tpg),
+				/* scsiAttIntrPortIndex */
+				(TPG_TFO(se_tpg)->sess_get_index != NULL) ?
+				TPG_TFO(se_tpg)->sess_get_index(se_sess) :
+				0,
+				/* scsiAttIntrPortAuthIntrIdx */
+				se_nacl->acl_index,
+				/* scsiAttIntrPortName */
+				se_nacl->initiatorname[0] ?
+					se_nacl->initiatorname : NONE,
+				/* scsiAttIntrPortIdentifier */
+				buf);
+		}
+		spin_unlock(&se_nacl->device_list_lock);
+	}
+	spin_unlock(&se_tpg->session_lock);
+
+	return 0;
+}
+
+static const struct seq_operations scsi_att_intr_port_seq_ops = {
+	.start	= scsi_att_intr_port_seq_start,
+	.next	= scsi_att_intr_port_seq_next,
+	.stop	= scsi_att_intr_port_seq_stop,
+	.show	= scsi_att_intr_port_seq_show
+};
+
+static int scsi_att_intr_port_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_att_intr_port_seq_ops);
+}
+
+static const struct file_operations scsi_att_intr_port_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_att_intr_port_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/*
+ * SCSI Logical Unit Table
+ */
+static void *scsi_lu_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	return locate_hba_start(seq, pos);
+}
+
+static void *scsi_lu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_lu_seq_stop(struct seq_file *seq, void *v)
+{
+	locate_hba_stop(seq, v);
+}
+
+#define SCSI_LU_INDEX		1
+static int scsi_lu_seq_show(struct seq_file *seq, void *v)
+{
+	struct se_hba *hba;
+	struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+						g_se_dev_list);
+	struct se_device *dev = se_dev->se_dev_ptr;
+	int j;
+	char str[28];
+
+	if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+		seq_puts(seq, "inst dev indx LUN lu_name vend prod rev"
+		" dev_type status state-bit num_cmds read_mbytes"
+		" write_mbytes resets full_stat hs_num_cmds creation_time\n");
+
+	if (!(dev))
+		return 0;
+
+	hba = dev->se_hba;
+	if (!(hba)) {
+		/* Log error ? */
+		return 0;
+	}
+
+	/* Fix LU state, if we can read it from the device */
+	seq_printf(seq, "%u %u %u %llu %s", hba->hba_index,
+			dev->dev_index, SCSI_LU_INDEX,
+			(unsigned long long)0, /* FIXME: scsiLuDefaultLun */
+			(strlen(DEV_T10_WWN(dev)->unit_serial)) ?
+			/* scsiLuWwnName */
+			(char *)&DEV_T10_WWN(dev)->unit_serial[0] :
+			"None");
+
+	memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+	/* scsiLuVendorId */
+	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;
+	seq_printf(seq, " %s", str);
+
+	/* scsiLuProductId */
+	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;
+	seq_printf(seq, " %s", str);
+
+	/* scsiLuRevisionId */
+	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;
+	seq_printf(seq, " %s", str);
+
+	seq_printf(seq, " %u %s %s %llu %u %u %u %u %u %u\n",
+		/* scsiLuPeripheralType */
+		   TRANSPORT(dev)->get_device_type(dev),
+		   (dev->dev_status == TRANSPORT_DEVICE_ACTIVATED) ?
+		"available" : "notavailable", /* scsiLuStatus */
+		"exposed", 	/* scsiLuState */
+		(unsigned long long)dev->num_cmds,
+		/* scsiLuReadMegaBytes */
+		(u32)(dev->read_bytes >> 20),
+		/* scsiLuWrittenMegaBytes */
+		(u32)(dev->write_bytes >> 20),
+		dev->num_resets, /* scsiLuInResets */
+		0, /* scsiLuOutTaskSetFullStatus */
+		0, /* scsiLuHSInCommands */
+		(u32)(((u32)dev->creation_time - INITIAL_JIFFIES) *
+							100 / HZ));
+
+	return 0;
+}
+
+static const struct seq_operations scsi_lu_seq_ops = {
+	.start  = scsi_lu_seq_start,
+	.next   = scsi_lu_seq_next,
+	.stop   = scsi_lu_seq_stop,
+	.show   = scsi_lu_seq_show
+};
+
+static int scsi_lu_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &scsi_lu_seq_ops);
+}
+
+static const struct file_operations scsi_lu_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = scsi_lu_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+/****************************************************************************/
+
+/*
+ * Remove proc fs entries
+ */
+void remove_scsi_target_mib(void)
+{
+	remove_proc_entry("scsi_target/mib/scsi_inst", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_dev", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_port", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_transport", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_tgt_dev", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_tgt_port", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_auth_intr", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_att_intr_port", NULL);
+	remove_proc_entry("scsi_target/mib/scsi_lu", NULL);
+	remove_proc_entry("scsi_target/mib", NULL);
+}
+
+/*
+ * Create proc fs entries for the mib tables
+ */
+int init_scsi_target_mib(void)
+{
+	struct proc_dir_entry *dir_entry;
+	struct proc_dir_entry *scsi_inst_entry;
+	struct proc_dir_entry *scsi_dev_entry;
+	struct proc_dir_entry *scsi_port_entry;
+	struct proc_dir_entry *scsi_transport_entry;
+	struct proc_dir_entry *scsi_tgt_dev_entry;
+	struct proc_dir_entry *scsi_tgt_port_entry;
+	struct proc_dir_entry *scsi_auth_intr_entry;
+	struct proc_dir_entry *scsi_att_intr_port_entry;
+	struct proc_dir_entry *scsi_lu_entry;
+
+	dir_entry = proc_mkdir("scsi_target/mib", NULL);
+	if (!(dir_entry)) {
+		printk(KERN_ERR "proc_mkdir() failed.\n");
+		return -1;
+	}
+
+	scsi_inst_entry =
+		create_proc_entry("scsi_target/mib/scsi_inst", 0, NULL);
+	if (scsi_inst_entry)
+		scsi_inst_entry->proc_fops = &scsi_inst_seq_fops;
+	else
+		goto error;
+
+	scsi_dev_entry =
+		create_proc_entry("scsi_target/mib/scsi_dev", 0, NULL);
+	if (scsi_dev_entry)
+		scsi_dev_entry->proc_fops = &scsi_dev_seq_fops;
+	else
+		goto error;
+
+	scsi_port_entry =
+		create_proc_entry("scsi_target/mib/scsi_port", 0, NULL);
+	if (scsi_port_entry)
+		scsi_port_entry->proc_fops = &scsi_port_seq_fops;
+	else
+		goto error;
+
+	scsi_transport_entry =
+		create_proc_entry("scsi_target/mib/scsi_transport", 0, NULL);
+	if (scsi_transport_entry)
+		scsi_transport_entry->proc_fops = &scsi_transport_seq_fops;
+	else
+		goto error;
+
+	scsi_tgt_dev_entry =
+		create_proc_entry("scsi_target/mib/scsi_tgt_dev", 0, NULL);
+	if (scsi_tgt_dev_entry)
+		scsi_tgt_dev_entry->proc_fops = &scsi_tgt_dev_seq_fops;
+	else
+		goto error;
+
+	scsi_tgt_port_entry =
+		create_proc_entry("scsi_target/mib/scsi_tgt_port", 0, NULL);
+	if (scsi_tgt_port_entry)
+		scsi_tgt_port_entry->proc_fops = &scsi_tgt_port_seq_fops;
+	else
+		goto error;
+
+	scsi_auth_intr_entry =
+		create_proc_entry("scsi_target/mib/scsi_auth_intr", 0, NULL);
+	if (scsi_auth_intr_entry)
+		scsi_auth_intr_entry->proc_fops = &scsi_auth_intr_seq_fops;
+	else
+		goto error;
+
+	scsi_att_intr_port_entry =
+	      create_proc_entry("scsi_target/mib/scsi_att_intr_port", 0, NULL);
+	if (scsi_att_intr_port_entry)
+		scsi_att_intr_port_entry->proc_fops =
+				&scsi_att_intr_port_seq_fops;
+	else
+		goto error;
+
+	scsi_lu_entry = create_proc_entry("scsi_target/mib/scsi_lu", 0, NULL);
+	if (scsi_lu_entry)
+		scsi_lu_entry->proc_fops = &scsi_lu_seq_fops;
+	else
+		goto error;
+
+	return 0;
+
+error:
+	printk(KERN_ERR "create_proc_entry() failed.\n");
+	remove_scsi_target_mib();
+	return -1;
+}
+
+/*
+ * Initialize the index table for allocating unique row indexes to various mib
+ * tables
+ */
+void init_scsi_index_table(void)
+{
+	memset(&scsi_index_table, 0, sizeof(struct scsi_index_table));
+	spin_lock_init(&scsi_index_table.lock);
+}
+
+/*
+ * Allocate a new row index for the entry type specified
+ */
+u32 scsi_get_new_index(scsi_index_t type)
+{
+	u32 new_index;
+
+	if ((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)) {
+		printk(KERN_ERR "Invalid index type %d\n", type);
+		return -1;
+	}
+
+	spin_lock(&scsi_index_table.lock);
+	new_index = ++scsi_index_table.scsi_mib_index[type];
+	if (new_index == 0)
+		new_index = ++scsi_index_table.scsi_mib_index[type];
+	spin_unlock(&scsi_index_table.lock);
+
+	return new_index;
+}
+EXPORT_SYMBOL(scsi_get_new_index);
diff --git a/drivers/target/target_core_mib.h b/drivers/target/target_core_mib.h
new file mode 100644
index 0000000..5a53dbb
--- /dev/null
+++ b/drivers/target/target_core_mib.h
@@ -0,0 +1,31 @@
+#ifndef TARGET_CORE_MIB_H
+#define TARGET_CORE_MIB_H
+
+extern struct se_global *se_global;
+
+typedef enum {
+	SCSI_INST_INDEX,
+	SCSI_DEVICE_INDEX,
+	SCSI_AUTH_INTR_INDEX,
+	SCSI_INDEX_TYPE_MAX
+} scsi_index_t;
+
+struct scsi_index_table {
+	spinlock_t	lock;
+	u32 		scsi_mib_index[SCSI_INDEX_TYPE_MAX];
+} ____cacheline_aligned;
+
+/* SCSI Port stats */
+struct scsi_port_stats {
+	u64	cmd_pdus;
+	u64	tx_data_octets;
+	u64	rx_data_octets;
+} ____cacheline_aligned;
+
+extern int init_scsi_target_mib(void);
+extern void remove_scsi_target_mib(void);
+extern void init_scsi_index_table(void);
+extern u32 scsi_get_new_index(scsi_index_t);
+
+#endif   /*** TARGET_CORE_MIB_H ***/
+
-- 
1.7.2.2

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