Mike Anderson | 51e5b2b | 2007-10-19 22:48:00 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Device Mapper Uevent Support (dm-uevent) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the |
| 6 | * Free Software Foundation; either version 2 of the License, or (at your |
| 7 | * option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | * |
| 18 | * Copyright IBM Corporation, 2007 |
| 19 | * Author: Mike Anderson <andmike@linux.vnet.ibm.com> |
| 20 | */ |
| 21 | #include <linux/list.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/kobject.h> |
| 24 | |
| 25 | #include "dm.h" |
| 26 | #include "dm-uevent.h" |
| 27 | |
| 28 | #define DM_MSG_PREFIX "uevent" |
| 29 | |
| 30 | static struct kmem_cache *_dm_event_cache; |
| 31 | |
| 32 | struct dm_uevent { |
| 33 | struct mapped_device *md; |
| 34 | enum kobject_action action; |
| 35 | struct kobj_uevent_env ku_env; |
| 36 | struct list_head elist; |
| 37 | }; |
| 38 | |
| 39 | static void dm_uevent_free(struct dm_uevent *event) |
| 40 | { |
| 41 | kmem_cache_free(_dm_event_cache, event); |
| 42 | } |
| 43 | |
| 44 | static struct dm_uevent *dm_uevent_alloc(struct mapped_device *md) |
| 45 | { |
| 46 | struct dm_uevent *event; |
| 47 | |
| 48 | event = kmem_cache_zalloc(_dm_event_cache, GFP_ATOMIC); |
| 49 | if (!event) |
| 50 | return NULL; |
| 51 | |
| 52 | INIT_LIST_HEAD(&event->elist); |
| 53 | event->md = md; |
| 54 | |
| 55 | return event; |
| 56 | } |
| 57 | |
| 58 | int dm_uevent_init(void) |
| 59 | { |
| 60 | _dm_event_cache = KMEM_CACHE(dm_uevent, 0); |
| 61 | if (!_dm_event_cache) |
| 62 | return -ENOMEM; |
| 63 | |
| 64 | DMINFO("version 1.0.3"); |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | void dm_uevent_exit(void) |
| 70 | { |
| 71 | kmem_cache_destroy(_dm_event_cache); |
| 72 | } |