From: Mike Anderson <andmike@xxxxxxxxxxxxxxxxxx>
This patch adds a uevent skeleton to device-mapper.
Signed-off-by: Mike Anderson <andmike@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Alasdair G Kergon <agk@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: linux-2.6.23/drivers/md/Kconfig
===================================================================
--- linux-2.6.23.orig/drivers/md/Kconfig 2007-10-17 11:43:05.000000000 +0100
+++ linux-2.6.23/drivers/md/Kconfig 2007-10-17 11:43:06.000000000 +0100
@@ -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
Index: linux-2.6.23/drivers/md/Makefile
===================================================================
--- linux-2.6.23.orig/drivers/md/Makefile 2007-10-17 11:43:05.000000000 +0100
+++ linux-2.6.23/drivers/md/Makefile 2007-10-17 11:43:06.000000000 +0100
@@ -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
Index: linux-2.6.23/drivers/md/dm-uevent.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.23/drivers/md/dm-uevent.c 2007-10-17 11:43:06.000000000 +0100
@@ -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@xxxxxxxxxxxxxxxxxx>
+ */
+#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);
+}
Index: linux-2.6.23/drivers/md/dm-uevent.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.23/drivers/md/dm-uevent.h 2007-10-17 11:43:06.000000000 +0100
@@ -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@xxxxxxxxxxxxxxxxxx>
+ */
+#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: linux-2.6.23/drivers/md/dm.c
===================================================================
--- linux-2.6.23.orig/drivers/md/dm.c 2007-10-17 11:43:05.000000000 +0100
+++ linux-2.6.23/drivers/md/dm.c 2007-10-17 11:53:30.000000000 +0100
@@ -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;
--
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