This patch adds a dm-uevent skeleton support to the Makefile, and the dm directory. Signed-off-by: Mike Anderson <andmike@xxxxxxxxxx> --- drivers/md/Kconfig | 6 ++++ drivers/md/Makefile | 4 ++ drivers/md/dm-uevent.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++ drivers/md/dm-uevent.h | 41 +++++++++++++++++++++++++++ drivers/md/dm.c | 10 ++++++ 5 files changed, 133 insertions(+) Index: b/drivers/md/Kconfig =================================================================== --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -276,4 +276,10 @@ 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 Index: b/drivers/md/Makefile =================================================================== --- a/drivers/md/Makefile +++ b/drivers/md/Makefile @@ -48,6 +48,10 @@ 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 Index: b/drivers/md/dm-uevent.c =================================================================== --- /dev/null +++ b/drivers/md/dm-uevent.c @@ -0,0 +1,72 @@ +/* + * 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@xxxxxxxxxx> + */ +#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 *_dme_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 *evt) +{ + kmem_cache_free(_dme_cache, evt); +} + +static struct dm_uevent *dm_uevent_alloc(struct mapped_device *md) +{ + struct dm_uevent *evt; + + evt = kmem_cache_zalloc(_dme_cache, GFP_ATOMIC); + if (!evt) + return NULL; + + INIT_LIST_HEAD(&evt->elist); + evt->md = md; + + return evt; +} + +int dm_uevent_init(void) +{ + _dme_cache = KMEM_CACHE(dm_uevent, 0); + if (!_dme_cache) + return -ENOMEM; + + DMINFO("version 1.0.1 inited"); + + return 0; +} + +void dm_uevent_exit(void) +{ + kmem_cache_destroy(_dme_cache); +} Index: b/drivers/md/dm-uevent.h =================================================================== --- /dev/null +++ b/drivers/md/dm-uevent.h @@ -0,0 +1,41 @@ +/* + * 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@xxxxxxxxxx> + */ +#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 */ Index: b/drivers/md/dm.c =================================================================== --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -7,6 +7,7 @@ #include "dm.h" #include "dm-bio-list.h" +#include "dm-uevent.h" #include <linux/init.h> #include <linux/module.h> @@ -151,6 +152,14 @@ static int __init local_init(void) return r; } + r = dm_uevent_init(); + if (r < 0) { + kmem_cache_destroy(_tio_cache); + kmem_cache_destroy(_io_cache); + unregister_blkdev(_major, _name); + return r; + } + if (!_major) _major = r; @@ -159,6 +168,7 @@ static int __init local_init(void) static void local_exit(void) { + dm_uevent_exit(); kmem_cache_destroy(_tio_cache); kmem_cache_destroy(_io_cache); unregister_blkdev(_major, _name); -- -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel