diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/md/Makefile | 4 | ||||
| -rw-r--r-- | drivers/md/dm-uevent.c | 72 | ||||
| -rw-r--r-- | drivers/md/dm-uevent.h | 41 | ||||
| -rw-r--r-- | drivers/md/dm.c | 10 |
5 files changed, 133 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index a99af897820..9b6fbf044fd 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -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 diff --git a/drivers/md/Makefile b/drivers/md/Makefile index fded842edeb..d9aa7edb878 100644 --- a/drivers/md/Makefile +++ b/drivers/md/Makefile @@ -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 diff --git a/drivers/md/dm-uevent.c b/drivers/md/dm-uevent.c new file mode 100644 index 00000000000..53200c96bcb --- /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@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); +} diff --git a/drivers/md/dm-uevent.h b/drivers/md/dm-uevent.h new file mode 100644 index 00000000000..9d776836489 --- /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@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 */ diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 41c9549b32a..bb5c1eaca52 100644 --- 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> @@ -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; |