dm: add uevent to core (51e5b2bd) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/md/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -282,4 +282,10 @@ config DM_DELAY

		If unsure, say N.

		config DM_UEVENT
		bool "DM uevents (EXPERIMENTAL)"
		depends on BLK_DEV_DM && EXPERIMENTAL
		---help---
		Generate udev events for DM events.

		endif # MD

drivers/md/Makefile

+4 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,10 @@ ifeq ($(CONFIG_ALTIVEC),y)
		altivec_flags := -maltivec -mabi=altivec
		endif

		ifeq ($(CONFIG_DM_UEVENT),y)
		dm-mod-objs += dm-uevent.o
		endif

		targets += raid6int1.c
		$(obj)/raid6int1.c: UNROLL := 1
		$(obj)/raid6int1.c: $(src)/raid6int.uc $(src)/unroll.pl FORCE

drivers/md/dm-uevent.c

0 → 100644

+72 −0

Original line number	Diff line number	Diff line
		/*
		* Device Mapper Uevent Support (dm-uevent)
		*
		* 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.
		*
		* Copyright IBM Corporation, 2007
		* Author: Mike Anderson <andmike@linux.vnet.ibm.com>
		*/
		#include <linux/list.h>
		#include <linux/slab.h>
		#include <linux/kobject.h>

		#include "dm.h"
		#include "dm-uevent.h"

		#define DM_MSG_PREFIX "uevent"

		static struct kmem_cache *_dm_event_cache;

		struct dm_uevent {
		struct mapped_device *md;
		enum kobject_action action;
		struct kobj_uevent_env ku_env;
		struct list_head elist;
		};

		static void dm_uevent_free(struct dm_uevent *event)
		{
		kmem_cache_free(_dm_event_cache, event);
		}

		static struct dm_uevent dm_uevent_alloc(struct mapped_device md)
		{
		struct dm_uevent *event;

		event = kmem_cache_zalloc(_dm_event_cache, GFP_ATOMIC);
		if (!event)
		return NULL;

		INIT_LIST_HEAD(&event->elist);
		event->md = md;

		return event;
		}

		int dm_uevent_init(void)
		{
		_dm_event_cache = KMEM_CACHE(dm_uevent, 0);
		if (!_dm_event_cache)
		return -ENOMEM;

		DMINFO("version 1.0.3");

		return 0;
		}

		void dm_uevent_exit(void)
		{
		kmem_cache_destroy(_dm_event_cache);
		}

drivers/md/dm-uevent.h

0 → 100644

+41 −0

Original line number	Diff line number	Diff line
		/*
		* Device Mapper Uevent Support
		*
		* 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.
		*
		* Copyright IBM Corporation, 2007
		* Author: Mike Anderson <andmike@linux.vnet.ibm.com>
		*/
		#ifndef DM_UEVENT_H
		#define DM_UEVENT_H

		#ifdef CONFIG_DM_UEVENT

		extern int dm_uevent_init(void);
		extern void dm_uevent_exit(void);

		#else

		static inline int dm_uevent_init(void)
		{
		return 0;
		}
		static inline void dm_uevent_exit(void)
		{
		}

		#endif /* CONFIG_DM_UEVENT */

		#endif /* DM_UEVENT_H */

drivers/md/dm.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@

		#include "dm.h"
		#include "dm-bio-list.h"
		#include "dm-uevent.h"

		#include <linux/init.h>
		#include <linux/module.h>
		@@ -143,11 +144,19 @@ static int __init local_init(void)
		return -ENOMEM;
		}

		r = dm_uevent_init();
		if (r) {
		kmem_cache_destroy(_tio_cache);
		kmem_cache_destroy(_io_cache);
		return r;
		}

		_major = major;
		r = register_blkdev(_major, _name);
		if (r < 0) {
		kmem_cache_destroy(_tio_cache);
		kmem_cache_destroy(_io_cache);
		dm_uevent_exit();
		return r;
		}

		@@ -162,6 +171,7 @@ static void local_exit(void)
		kmem_cache_destroy(_tio_cache);
		kmem_cache_destroy(_io_cache);
		unregister_blkdev(_major, _name);
		dm_uevent_exit();

		_major = 0;