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Date: Fri, 24 Oct 2008 13:04:42 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: "Linux-iSCSI.org Target Dev"
<linux-iscsi-target-dev@...glegroups.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>,
Mike Christie <michaelc@...wisc.edu>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Andrew Morton <akpm@...l.org>, Christoph Hellwig <hch@....de>,
Ming Zhang <blackmagic02881@...il.com>,
"Ross S. W. Walker" <rswwalker@...il.com>,
Arne Redlich <agr@...erkom-dd.de>,
Hannes Reinecke <hare@...e.de>
Subject: [PATCH] [Target_Core_Mod/ConfigFS]: Added storage object attributes
>>From 6f57b78ab1fca92d1fc85b6b82c15b12fccf256a Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Date: Fri, 24 Oct 2008 01:12:25 -0700
Subject: [PATCH] [Target_Core_Mod/ConfigFS]: Added storage object attributes
Added storage object attributes that live under:
/sys/kernel/config/target/core/$PLUGIN_HBA/$STORAGE_OBJECT/attrib/
here is what they look like:
`-- target
|-- core
| |-- iblock_0
| | |-- hba_info
| | `-- lvm_test0
| | |-- attrib
| | | |-- hw_max_sectors
| | | |-- hw_queue_depth
| | | |-- max_sectors
| | | |-- queue_depth
| | | |-- status_thread
| | | |-- status_thread_tur
| | | `-- task_timeout
| | |-- control
| | |-- enable
| | |-- fd
| | `-- info
| |-- pscsi_0
| | |-- hba_info
| | `-- sdd
| | |-- attrib
| | | |-- hw_max_sectors
| | | |-- hw_queue_depth
| | | |-- max_sectors
| | | |-- queue_depth
| | | |-- status_thread
| | | |-- status_thread_tur
| | | `-- task_timeout
| | |-- control
| | |-- enable
| | |-- fd
| | `-- info
These are the equivalent functionality of the IOCTL op:
target-ctl setdevattrib <storage object parameters>
Just as with 'setdevattrib', some of the cannot be changed while
$STORAGE_OBJECT has an active export to $FABRIC_MOD.
*queue_depth and *max_sectors are determined by target_core_mod's subsystem
plugins (Linux/SCSI, Linux/IBLOCK, Linux/FILEIO), and in some cases
with a real backing struct block_device, are subject to *REAL* hardware and HBA
limitiations.
Also, updated target_core_store_dev_enable() to use new
se_subsystem_api_t->create_virtdevice() function parameters.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/lio-core/target_core_configfs.c | 135 ++++++++++++++++++++++++++++++-
1 files changed, 132 insertions(+), 3 deletions(-)
diff --git a/drivers/lio-core/target_core_configfs.c b/drivers/lio-core/target_core_configfs.c
index 264dcdb..a5792e3 100644
--- a/drivers/lio-core/target_core_configfs.c
+++ b/drivers/lio-core/target_core_configfs.c
@@ -39,13 +39,13 @@
#include <iscsi_protocol.h>
#include <iscsi_debug_opcodes.h>
#include <iscsi_target_core.h>
+#include <target_core_base.h>
#include <iscsi_target_error.h>
#include <iscsi_target_ioctl.h>
#include <iscsi_target_ioctl_defs.h>
#include <target_core_device.h>
#include <iscsi_target_device.h>
#include <target_core_hba.h>
-#include <iscsi_target_info.h>
#include <target_core_plugin.h>
#include <target_core_transport.h>
#include <iscsi_target.h>
@@ -57,6 +57,7 @@
#include <target_core_fabric_ops.h>
#include <target_core_configfs.h>
+#include <configfs_macros.h>
extern se_global_t *se_global;
@@ -516,6 +517,118 @@ EXPORT_SYMBOL(target_fabric_configfs_deregister);
// Stop functions called by external Target Fabrics Modules
//##############################################################################
+// Start functions for struct config_item_type target_core_dev_attrib_cit
+
+#define DEF_DEV_ATTRIB_SHOW(_name) \
+static ssize_t target_core_dev_show_attr_##_name ( \
+ struct se_dev_attrib_s *da, \
+ char *page) \
+{ \
+ se_device_t *dev; \
+ se_subsystem_dev_t *se_dev = da->da_sub_dev; \
+ ssize_t rb; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ if (!(dev = se_dev->se_dev_ptr)) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return(-ENODEV); \
+ } \
+ rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return(rb); \
+}
+
+#define DEF_DEV_ATTRIB_STORE(_name) \
+static ssize_t target_core_dev_store_attr_##_name ( \
+ struct se_dev_attrib_s *da, \
+ const char *page, \
+ size_t count) \
+{ \
+ se_device_t *dev; \
+ se_subsystem_dev_t *se_dev = da->da_sub_dev; \
+ char *endptr; \
+ u32 val; \
+ int ret; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ if (!(dev = se_dev->se_dev_ptr)) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return(-ENODEV); \
+ } \
+ val = simple_strtoul(page, &endptr, 0); \
+ ret = se_dev_set_##_name(dev, (u32)val); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return((!ret) ? count : -EINVAL); \
+}
+
+#define DEF_DEV_ATTRIB(_name) \
+DEF_DEV_ATTRIB_SHOW(_name); \
+DEF_DEV_ATTRIB_STORE(_name);
+
+#define DEF_DEV_ATTRIB_RO(_name) \
+DEF_DEV_ATTRIB_SHOW(_name);
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib_s);
+#define SE_DEV_ATTR(_name, _mode) \
+static struct target_core_dev_attrib_attribute target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_show_attr_##_name, \
+ target_core_dev_store_attr_##_name);
+
+#define SE_DEV_ATTR_RO(_name); \
+static struct target_core_dev_attrib_attribute target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_show_attr_##_name);
+
+DEF_DEV_ATTRIB(status_thread);
+SE_DEV_ATTR(status_thread, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(status_thread_tur);
+SE_DEV_ATTR(status_thread_tur, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_max_sectors);
+SE_DEV_ATTR_RO(hw_max_sectors);
+
+DEF_DEV_ATTRIB(max_sectors);
+SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_queue_depth);
+SE_DEV_ATTR_RO(hw_queue_depth);
+
+DEF_DEV_ATTRIB(queue_depth);
+SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(task_timeout);
+SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib_s, da_group);
+
+static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
+ &target_core_dev_attrib_status_thread.attr,
+ &target_core_dev_attrib_status_thread_tur.attr,
+ &target_core_dev_attrib_hw_max_sectors.attr,
+ &target_core_dev_attrib_max_sectors.attr,
+ &target_core_dev_attrib_hw_queue_depth.attr,
+ &target_core_dev_attrib_queue_depth.attr,
+ &target_core_dev_attrib_task_timeout.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_attrib_ops = {
+ .show_attribute = target_core_dev_attrib_attr_show,
+ .store_attribute = target_core_dev_attrib_attr_store,
+};
+
+static struct config_item_type target_core_dev_attrib_cit = {
+ .ct_item_ops = &target_core_dev_attrib_ops,
+ .ct_attrs = target_core_dev_attrib_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+// End functions for struct config_item_type target_core_dev_attrib_cit
+
// Start functions for struct config_item_type target_core_dev_cit
static ssize_t target_core_show_dev_info (void *p, char *page)
@@ -646,7 +759,7 @@ static ssize_t target_core_store_dev_enable (void *p, const char *page, size_t c
if (t->check_configfs_dev_params(hba, se_dev) < 0)
return(-EINVAL);
- dev = t->create_virtdevice(hba, se_dev->se_dev_su_ptr);
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
if (!(dev) || IS_ERR(dev))
return(-EINVAL);
@@ -727,6 +840,7 @@ static struct config_group *target_core_call_createdev (
se_hba_t *hba, *hba_p;
se_subsystem_api_t *t;
struct config_item *hba_ci;
+ struct config_group *dev_cg = NULL;
int ret = 0;
if (!(hba_ci = &group->cg_item)) {
@@ -754,7 +868,15 @@ static struct config_group *target_core_call_createdev (
printk(KERN_ERR "Unable to allocate memory for se_subsystem_dev_t\n");
return(NULL);
}
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+
se_dev->se_dev_hba = hba;
+ dev_cg = &se_dev->se_dev_group;
+
+ if (!(dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL)))
+ goto out;
/*
* Set se_dev_ptr from se_subsystem_api_t returned void ptr..
@@ -765,7 +887,12 @@ static struct config_group *target_core_call_createdev (
goto out;
}
- config_group_init_type_name(&se_dev->se_dev_group, name, &target_core_dev_cit);
+ config_group_init_type_name(&se_dev->se_dev_group, name,
+ &target_core_dev_cit);
+ config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
+ &target_core_dev_attrib_cit);
+ dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
+ dev_cg->default_groups[1] = NULL;
printk("Target_Core_ConfigFS: Allocated se_subsystem_dev_t: %p se_dev_su_ptr: %p\n",
se_dev, se_dev->se_dev_su_ptr);
@@ -773,6 +900,8 @@ static struct config_group *target_core_call_createdev (
core_put_hba(hba);
return(&se_dev->se_dev_group);
out:
+ if (dev_cg)
+ kfree(dev_cg->default_groups);
kfree(se_dev);
core_put_hba(hba);
return(NULL);
--
1.5.4.1
--
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