On Sun, 4 Nov 2007 12:17:27 -0800 Randy Dunlap wrote:
ping. James, Jens?
Acked-by: Jeff Garzik <jeff@xxxxxxxxxx>
> From: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
>
> Move RAID class configuration to the BLOCK menu since it is not
> SCSI-specific.
>
> Signed-off-by: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
> ---
> block/Kconfig | 5
> block/Makefile | 2
> block/raid_class.c | 313 +++++++++++++++++++++++++++++++++++++++++++++
> drivers/scsi/Kconfig | 7 -
> drivers/scsi/Makefile | 2
> drivers/scsi/raid_class.c | 314 ----------------------------------------------
> 6 files changed, 320 insertions(+), 323 deletions(-)
>
> --- linux-2.6.24-rc1-git13.orig/block/Kconfig
> +++ linux-2.6.24-rc1-git13/block/Kconfig
> @@ -62,6 +62,11 @@ config BLK_DEV_BSG
> protocols (e.g. Task Management Functions and SMP in Serial
> Attached SCSI).
>
> +config RAID_ATTRS
> + tristate "RAID Transport Class"
> + ---help---
> + Provides RAID class information in sysfs.
> +
> endif # BLOCK
>
> config BLOCK_COMPAT
> --- linux-2.6.24-rc1-git13.orig/drivers/scsi/Kconfig
> +++ linux-2.6.24-rc1-git13/drivers/scsi/Kconfig
> @@ -1,12 +1,5 @@
> menu "SCSI device support"
>
> -config RAID_ATTRS
> - tristate "RAID Transport Class"
> - default n
> - depends on BLOCK
> - ---help---
> - Provides RAID
> -
> config SCSI
> tristate "SCSI device support"
> depends on BLOCK
> --- /dev/null
> +++ linux-2.6.24-rc1-git13/block/raid_class.c
> @@ -0,0 +1,313 @@
> +/*
> + * raid_class.c - implementation of a simple raid visualisation class
> + *
> + * Copyright (c) 2005 - James Bottomley <James.Bottomley@xxxxxxxxxxxx>
> + *
> + * This file is licensed under GPLv2
> + *
> + * This class is designed to allow raid attributes to be visualised and
> + * manipulated in a form independent of the underlying raid. Ultimately this
> + * should work for both hardware and software raids.
> + */
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/list.h>
> +#include <linux/slab.h>
> +#include <linux/string.h>
> +#include <linux/raid_class.h>
> +#include <scsi/scsi_device.h>
> +#include <scsi/scsi_host.h>
> +
> +#define RAID_NUM_ATTRS 3
> +
> +struct raid_internal {
> + struct raid_template r;
> + struct raid_function_template *f;
> + /* The actual attributes */
> + struct class_device_attribute private_attrs[RAID_NUM_ATTRS];
> + /* The array of null terminated pointers to attributes
> + * needed by scsi_sysfs.c */
> + struct class_device_attribute *attrs[RAID_NUM_ATTRS + 1];
> +};
> +
> +struct raid_component {
> + struct list_head node;
> + struct class_device cdev;
> + int num;
> +};
> +
> +#define to_raid_internal(tmpl) container_of(tmpl, struct raid_internal, r)
> +
> +#define tc_to_raid_internal(tcont) ({ \
> + struct raid_template *r = \
> + container_of(tcont, struct raid_template, raid_attrs); \
> + to_raid_internal(r); \
> +})
> +
> +#define ac_to_raid_internal(acont) ({ \
> + struct transport_container *tc = \
> + container_of(acont, struct transport_container, ac); \
> + tc_to_raid_internal(tc); \
> +})
> +
> +#define class_device_to_raid_internal(cdev) ({ \
> + struct attribute_container *ac = \
> + attribute_container_classdev_to_container(cdev); \
> + ac_to_raid_internal(ac); \
> +})
> +
> +
> +static int raid_match(struct attribute_container *cont, struct device *dev)
> +{
> + /* We have to look for every subsystem that could house
> + * emulated RAID devices, so start with SCSI */
> + struct raid_internal *i = ac_to_raid_internal(cont);
> +
> + if (scsi_is_sdev_device(dev)) {
> + struct scsi_device *sdev = to_scsi_device(dev);
> +
> + if (i->f->cookie != sdev->host->hostt)
> + return 0;
> +
> + return i->f->is_raid(dev);
> + }
> + /* FIXME: look at other subsystems too */
> + return 0;
> +}
> +
> +static int raid_setup(struct transport_container *tc, struct device *dev,
> + struct class_device *cdev)
> +{
> + struct raid_data *rd;
> +
> + BUG_ON(class_get_devdata(cdev));
> +
> + rd = kzalloc(sizeof(*rd), GFP_KERNEL);
> + if (!rd)
> + return -ENOMEM;
> +
> + INIT_LIST_HEAD(&rd->component_list);
> + class_set_devdata(cdev, rd);
> +
> + return 0;
> +}
> +
> +static int raid_remove(struct transport_container *tc, struct device *dev,
> + struct class_device *cdev)
> +{
> + struct raid_data *rd = class_get_devdata(cdev);
> + struct raid_component *rc, *next;
> + dev_printk(KERN_ERR, dev, "RAID REMOVE\n");
> + class_set_devdata(cdev, NULL);
> + list_for_each_entry_safe(rc, next, &rd->component_list, node) {
> + list_del(&rc->node);
> + dev_printk(KERN_ERR, rc->cdev.dev, "RAID COMPONENT REMOVE\n");
> + class_device_unregister(&rc->cdev);
> + }
> + dev_printk(KERN_ERR, dev, "RAID REMOVE DONE\n");
> + kfree(rd);
> + return 0;
> +}
> +
> +static DECLARE_TRANSPORT_CLASS(raid_class,
> + "raid_devices",
> + raid_setup,
> + raid_remove,
> + NULL);
> +
> +static const struct {
> + enum raid_state value;
> + char *name;
> +} raid_states[] = {
> + { RAID_STATE_UNKNOWN, "unknown" },
> + { RAID_STATE_ACTIVE, "active" },
> + { RAID_STATE_DEGRADED, "degraded" },
> + { RAID_STATE_RESYNCING, "resyncing" },
> + { RAID_STATE_OFFLINE, "offline" },
> +};
> +
> +static const char *raid_state_name(enum raid_state state)
> +{
> + int i;
> + char *name = NULL;
> +
> + for (i = 0; i < ARRAY_SIZE(raid_states); i++) {
> + if (raid_states[i].value == state) {
> + name = raid_states[i].name;
> + break;
> + }
> + }
> + return name;
> +}
> +
> +static struct {
> + enum raid_level value;
> + char *name;
> +} raid_levels[] = {
> + { RAID_LEVEL_UNKNOWN, "unknown" },
> + { RAID_LEVEL_LINEAR, "linear" },
> + { RAID_LEVEL_0, "raid0" },
> + { RAID_LEVEL_1, "raid1" },
> + { RAID_LEVEL_10, "raid10" },
> + { RAID_LEVEL_3, "raid3" },
> + { RAID_LEVEL_4, "raid4" },
> + { RAID_LEVEL_5, "raid5" },
> + { RAID_LEVEL_50, "raid50" },
> + { RAID_LEVEL_6, "raid6" },
> +};
> +
> +static const char *raid_level_name(enum raid_level level)
> +{
> + int i;
> + char *name = NULL;
> +
> + for (i = 0; i < ARRAY_SIZE(raid_levels); i++) {
> + if (raid_levels[i].value == level) {
> + name = raid_levels[i].name;
> + break;
> + }
> + }
> + return name;
> +}
> +
> +#define raid_attr_show_internal(attr, fmt, var, code) \
> +static ssize_t raid_show_##attr(struct class_device *cdev, char *buf) \
> +{ \
> + struct raid_data *rd = class_get_devdata(cdev); \
> + code \
> + return snprintf(buf, 20, #fmt "\n", var); \
> +}
> +
> +#define raid_attr_ro_states(attr, states, code) \
> +raid_attr_show_internal(attr, %s, name, \
> + const char *name; \
> + code \
> + name = raid_##states##_name(rd->attr); \
> +) \
> +static CLASS_DEVICE_ATTR(attr, S_IRUGO, raid_show_##attr, NULL)
> +
> +
> +#define raid_attr_ro_internal(attr, code) \
> +raid_attr_show_internal(attr, %d, rd->attr, code) \
> +static CLASS_DEVICE_ATTR(attr, S_IRUGO, raid_show_##attr, NULL)
> +
> +#define ATTR_CODE(attr) \
> + struct raid_internal *i = class_device_to_raid_internal(cdev); \
> + if (i->f->get_##attr) \
> + i->f->get_##attr(cdev->dev);
> +
> +#define raid_attr_ro(attr) raid_attr_ro_internal(attr, )
> +#define raid_attr_ro_fn(attr) raid_attr_ro_internal(attr, ATTR_CODE(attr))
> +#define raid_attr_ro_state(attr) raid_attr_ro_states(attr, attr, )
> +#define raid_attr_ro_state_fn(attr) raid_attr_ro_states(attr, attr, ATTR_CODE(attr))
> +
> +
> +raid_attr_ro_state(level);
> +raid_attr_ro_fn(resync);
> +raid_attr_ro_state_fn(state);
> +
> +static void raid_component_release(struct class_device *cdev)
> +{
> + struct raid_component *rc = container_of(cdev, struct raid_component,
> + cdev);
> + dev_printk(KERN_ERR, rc->cdev.dev, "COMPONENT RELEASE\n");
> + put_device(rc->cdev.dev);
> + kfree(rc);
> +}
> +
> +int raid_component_add(struct raid_template *r,struct device *raid_dev,
> + struct device *component_dev)
> +{
> + struct class_device *cdev =
> + attribute_container_find_class_device(&r->raid_attrs.ac,
> + raid_dev);
> + struct raid_component *rc;
> + struct raid_data *rd = class_get_devdata(cdev);
> + int err;
> +
> + rc = kzalloc(sizeof(*rc), GFP_KERNEL);
> + if (!rc)
> + return -ENOMEM;
> +
> + INIT_LIST_HEAD(&rc->node);
> + class_device_initialize(&rc->cdev);
> + rc->cdev.release = raid_component_release;
> + rc->cdev.dev = get_device(component_dev);
> + rc->num = rd->component_count++;
> +
> + snprintf(rc->cdev.class_id, sizeof(rc->cdev.class_id),
> + "component-%d", rc->num);
> + list_add_tail(&rc->node, &rd->component_list);
> + rc->cdev.parent = cdev;
> + rc->cdev.class = &raid_class.class;
> + err = class_device_add(&rc->cdev);
> + if (err)
> + goto err_out;
> +
> + return 0;
> +
> +err_out:
> + list_del(&rc->node);
> + rd->component_count--;
> + put_device(component_dev);
> + kfree(rc);
> + return err;
> +}
> +EXPORT_SYMBOL(raid_component_add);
> +
> +struct raid_template *
> +raid_class_attach(struct raid_function_template *ft)
> +{
> + struct raid_internal *i = kzalloc(sizeof(struct raid_internal),
> + GFP_KERNEL);
> + int count = 0;
> +
> + if (unlikely(!i))
> + return NULL;
> +
> + i->f = ft;
> +
> + i->r.raid_attrs.ac.class = &raid_class.class;
> + i->r.raid_attrs.ac.match = raid_match;
> + i->r.raid_attrs.ac.attrs = &i->attrs[0];
> +
> + attribute_container_register(&i->r.raid_attrs.ac);
> +
> + i->attrs[count++] = &class_device_attr_level;
> + i->attrs[count++] = &class_device_attr_resync;
> + i->attrs[count++] = &class_device_attr_state;
> +
> + i->attrs[count] = NULL;
> + BUG_ON(count > RAID_NUM_ATTRS);
> +
> + return &i->r;
> +}
> +EXPORT_SYMBOL(raid_class_attach);
> +
> +void
> +raid_class_release(struct raid_template *r)
> +{
> + struct raid_internal *i = to_raid_internal(r);
> +
> + attribute_container_unregister(&i->r.raid_attrs.ac);
> +
> + kfree(i);
> +}
> +EXPORT_SYMBOL(raid_class_release);
> +
> +static __init int raid_init(void)
> +{
> + return transport_class_register(&raid_class);
> +}
> +
> +static __exit void raid_exit(void)
> +{
> + transport_class_unregister(&raid_class);
> +}
> +
> +MODULE_AUTHOR("James Bottomley");
> +MODULE_DESCRIPTION("RAID device class");
> +MODULE_LICENSE("GPL");
> +
> +module_init(raid_init);
> +module_exit(raid_exit);
> --- linux-2.6.24-rc1-git13.orig/drivers/scsi/raid_class.c
> +++ /dev/null
> @@ -1,314 +0,0 @@
> -/*
> - * raid_class.c - implementation of a simple raid visualisation class
> - *
> - * Copyright (c) 2005 - James Bottomley <James.Bottomley@xxxxxxxxxxxx>
> - *
> - * This file is licensed under GPLv2
> - *
> - * This class is designed to allow raid attributes to be visualised and
> - * manipulated in a form independent of the underlying raid. Ultimately this
> - * should work for both hardware and software raids.
> - */
> -#include <linux/init.h>
> -#include <linux/module.h>
> -#include <linux/list.h>
> -#include <linux/slab.h>
> -#include <linux/string.h>
> -#include <linux/raid_class.h>
> -#include <scsi/scsi_device.h>
> -#include <scsi/scsi_host.h>
> -
> -#define RAID_NUM_ATTRS 3
> -
> -struct raid_internal {
> - struct raid_template r;
> - struct raid_function_template *f;
> - /* The actual attributes */
> - struct class_device_attribute private_attrs[RAID_NUM_ATTRS];
> - /* The array of null terminated pointers to attributes
> - * needed by scsi_sysfs.c */
> - struct class_device_attribute *attrs[RAID_NUM_ATTRS + 1];
> -};
> -
> -struct raid_component {
> - struct list_head node;
> - struct class_device cdev;
> - int num;
> -};
> -
> -#define to_raid_internal(tmpl) container_of(tmpl, struct raid_internal, r)
> -
> -#define tc_to_raid_internal(tcont) ({ \
> - struct raid_template *r = \
> - container_of(tcont, struct raid_template, raid_attrs); \
> - to_raid_internal(r); \
> -})
> -
> -#define ac_to_raid_internal(acont) ({ \
> - struct transport_container *tc = \
> - container_of(acont, struct transport_container, ac); \
> - tc_to_raid_internal(tc); \
> -})
> -
> -#define class_device_to_raid_internal(cdev) ({ \
> - struct attribute_container *ac = \
> - attribute_container_classdev_to_container(cdev); \
> - ac_to_raid_internal(ac); \
> -})
> -
> -
> -static int raid_match(struct attribute_container *cont, struct device *dev)
> -{
> - /* We have to look for every subsystem that could house
> - * emulated RAID devices, so start with SCSI */
> - struct raid_internal *i = ac_to_raid_internal(cont);
> -
> - if (scsi_is_sdev_device(dev)) {
> - struct scsi_device *sdev = to_scsi_device(dev);
> -
> - if (i->f->cookie != sdev->host->hostt)
> - return 0;
> -
> - return i->f->is_raid(dev);
> - }
> - /* FIXME: look at other subsystems too */
> - return 0;
> -}
> -
> -static int raid_setup(struct transport_container *tc, struct device *dev,
> - struct class_device *cdev)
> -{
> - struct raid_data *rd;
> -
> - BUG_ON(class_get_devdata(cdev));
> -
> - rd = kzalloc(sizeof(*rd), GFP_KERNEL);
> - if (!rd)
> - return -ENOMEM;
> -
> - INIT_LIST_HEAD(&rd->component_list);
> - class_set_devdata(cdev, rd);
> -
> - return 0;
> -}
> -
> -static int raid_remove(struct transport_container *tc, struct device *dev,
> - struct class_device *cdev)
> -{
> - struct raid_data *rd = class_get_devdata(cdev);
> - struct raid_component *rc, *next;
> - dev_printk(KERN_ERR, dev, "RAID REMOVE\n");
> - class_set_devdata(cdev, NULL);
> - list_for_each_entry_safe(rc, next, &rd->component_list, node) {
> - list_del(&rc->node);
> - dev_printk(KERN_ERR, rc->cdev.dev, "RAID COMPONENT REMOVE\n");
> - class_device_unregister(&rc->cdev);
> - }
> - dev_printk(KERN_ERR, dev, "RAID REMOVE DONE\n");
> - kfree(rd);
> - return 0;
> -}
> -
> -static DECLARE_TRANSPORT_CLASS(raid_class,
> - "raid_devices",
> - raid_setup,
> - raid_remove,
> - NULL);
> -
> -static const struct {
> - enum raid_state value;
> - char *name;
> -} raid_states[] = {
> - { RAID_STATE_UNKNOWN, "unknown" },
> - { RAID_STATE_ACTIVE, "active" },
> - { RAID_STATE_DEGRADED, "degraded" },
> - { RAID_STATE_RESYNCING, "resyncing" },
> - { RAID_STATE_OFFLINE, "offline" },
> -};
> -
> -static const char *raid_state_name(enum raid_state state)
> -{
> - int i;
> - char *name = NULL;
> -
> - for (i = 0; i < ARRAY_SIZE(raid_states); i++) {
> - if (raid_states[i].value == state) {
> - name = raid_states[i].name;
> - break;
> - }
> - }
> - return name;
> -}
> -
> -static struct {
> - enum raid_level value;
> - char *name;
> -} raid_levels[] = {
> - { RAID_LEVEL_UNKNOWN, "unknown" },
> - { RAID_LEVEL_LINEAR, "linear" },
> - { RAID_LEVEL_0, "raid0" },
> - { RAID_LEVEL_1, "raid1" },
> - { RAID_LEVEL_10, "raid10" },
> - { RAID_LEVEL_3, "raid3" },
> - { RAID_LEVEL_4, "raid4" },
> - { RAID_LEVEL_5, "raid5" },
> - { RAID_LEVEL_50, "raid50" },
> - { RAID_LEVEL_6, "raid6" },
> -};
> -
> -static const char *raid_level_name(enum raid_level level)
> -{
> - int i;
> - char *name = NULL;
> -
> - for (i = 0; i < ARRAY_SIZE(raid_levels); i++) {
> - if (raid_levels[i].value == level) {
> - name = raid_levels[i].name;
> - break;
> - }
> - }
> - return name;
> -}
> -
> -#define raid_attr_show_internal(attr, fmt, var, code) \
> -static ssize_t raid_show_##attr(struct class_device *cdev, char *buf) \
> -{ \
> - struct raid_data *rd = class_get_devdata(cdev); \
> - code \
> - return snprintf(buf, 20, #fmt "\n", var); \
> -}
> -
> -#define raid_attr_ro_states(attr, states, code) \
> -raid_attr_show_internal(attr, %s, name, \
> - const char *name; \
> - code \
> - name = raid_##states##_name(rd->attr); \
> -) \
> -static CLASS_DEVICE_ATTR(attr, S_IRUGO, raid_show_##attr, NULL)
> -
> -
> -#define raid_attr_ro_internal(attr, code) \
> -raid_attr_show_internal(attr, %d, rd->attr, code) \
> -static CLASS_DEVICE_ATTR(attr, S_IRUGO, raid_show_##attr, NULL)
> -
> -#define ATTR_CODE(attr) \
> - struct raid_internal *i = class_device_to_raid_internal(cdev); \
> - if (i->f->get_##attr) \
> - i->f->get_##attr(cdev->dev);
> -
> -#define raid_attr_ro(attr) raid_attr_ro_internal(attr, )
> -#define raid_attr_ro_fn(attr) raid_attr_ro_internal(attr, ATTR_CODE(attr))
> -#define raid_attr_ro_state(attr) raid_attr_ro_states(attr, attr, )
> -#define raid_attr_ro_state_fn(attr) raid_attr_ro_states(attr, attr, ATTR_CODE(attr))
> -
> -
> -raid_attr_ro_state(level);
> -raid_attr_ro_fn(resync);
> -raid_attr_ro_state_fn(state);
> -
> -static void raid_component_release(struct class_device *cdev)
> -{
> - struct raid_component *rc = container_of(cdev, struct raid_component,
> - cdev);
> - dev_printk(KERN_ERR, rc->cdev.dev, "COMPONENT RELEASE\n");
> - put_device(rc->cdev.dev);
> - kfree(rc);
> -}
> -
> -int raid_component_add(struct raid_template *r,struct device *raid_dev,
> - struct device *component_dev)
> -{
> - struct class_device *cdev =
> - attribute_container_find_class_device(&r->raid_attrs.ac,
> - raid_dev);
> - struct raid_component *rc;
> - struct raid_data *rd = class_get_devdata(cdev);
> - int err;
> -
> - rc = kzalloc(sizeof(*rc), GFP_KERNEL);
> - if (!rc)
> - return -ENOMEM;
> -
> - INIT_LIST_HEAD(&rc->node);
> - class_device_initialize(&rc->cdev);
> - rc->cdev.release = raid_component_release;
> - rc->cdev.dev = get_device(component_dev);
> - rc->num = rd->component_count++;
> -
> - snprintf(rc->cdev.class_id, sizeof(rc->cdev.class_id),
> - "component-%d", rc->num);
> - list_add_tail(&rc->node, &rd->component_list);
> - rc->cdev.parent = cdev;
> - rc->cdev.class = &raid_class.class;
> - err = class_device_add(&rc->cdev);
> - if (err)
> - goto err_out;
> -
> - return 0;
> -
> -err_out:
> - list_del(&rc->node);
> - rd->component_count--;
> - put_device(component_dev);
> - kfree(rc);
> - return err;
> -}
> -EXPORT_SYMBOL(raid_component_add);
> -
> -struct raid_template *
> -raid_class_attach(struct raid_function_template *ft)
> -{
> - struct raid_internal *i = kzalloc(sizeof(struct raid_internal),
> - GFP_KERNEL);
> - int count = 0;
> -
> - if (unlikely(!i))
> - return NULL;
> -
> - i->f = ft;
> -
> - i->r.raid_attrs.ac.class = &raid_class.class;
> - i->r.raid_attrs.ac.match = raid_match;
> - i->r.raid_attrs.ac.attrs = &i->attrs[0];
> -
> - attribute_container_register(&i->r.raid_attrs.ac);
> -
> - i->attrs[count++] = &class_device_attr_level;
> - i->attrs[count++] = &class_device_attr_resync;
> - i->attrs[count++] = &class_device_attr_state;
> -
> - i->attrs[count] = NULL;
> - BUG_ON(count > RAID_NUM_ATTRS);
> -
> - return &i->r;
> -}
> -EXPORT_SYMBOL(raid_class_attach);
> -
> -void
> -raid_class_release(struct raid_template *r)
> -{
> - struct raid_internal *i = to_raid_internal(r);
> -
> - attribute_container_unregister(&i->r.raid_attrs.ac);
> -
> - kfree(i);
> -}
> -EXPORT_SYMBOL(raid_class_release);
> -
> -static __init int raid_init(void)
> -{
> - return transport_class_register(&raid_class);
> -}
> -
> -static __exit void raid_exit(void)
> -{
> - transport_class_unregister(&raid_class);
> -}
> -
> -MODULE_AUTHOR("James Bottomley");
> -MODULE_DESCRIPTION("RAID device class");
> -MODULE_LICENSE("GPL");
> -
> -module_init(raid_init);
> -module_exit(raid_exit);
> -
> --- linux-2.6.24-rc1-git13.orig/block/Makefile
> +++ linux-2.6.24-rc1-git13/block/Makefile
> @@ -12,3 +12,5 @@ obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched
>
> obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
> obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o
> +
> +obj-$(CONFIG_RAID_ATTRS) += raid_class.o
> --- linux-2.6.24-rc1-git13.orig/drivers/scsi/Makefile
> +++ linux-2.6.24-rc1-git13/drivers/scsi/Makefile
> @@ -23,8 +23,6 @@ subdir-$(CONFIG_PCMCIA) += pcmcia
> obj-$(CONFIG_SCSI) += scsi_mod.o
> obj-$(CONFIG_SCSI_TGT) += scsi_tgt.o
>
> -obj-$(CONFIG_RAID_ATTRS) += raid_class.o
> -
> # --- NOTE ORDERING HERE ---
> # For kernel non-modular link, transport attributes need to
> # be initialised before drivers
---
~Randy
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