This helper function builds and enqueues the uevent. Targets can use this
when they do not need to customize the uevent beyond its name.
Signed-off-by: Andy Grover <agro...@redhat.com>
---
Documentation/device-mapper/dm-uevent.txt | 5 +++++
drivers/md/dm-uevent.c | 26 ++++++++++++++++++++++++++
include/linux/device-mapper.h | 1 +
3 files changed, 32 insertions(+)
diff --git a/Documentation/device-mapper/dm-uevent.txt
b/Documentation/device-mapper/dm-uevent.txt
index 4fcb71d..097e7f4 100644
--- a/Documentation/device-mapper/dm-uevent.txt
+++ b/Documentation/device-mapper/dm-uevent.txt
@@ -30,6 +30,11 @@ void dm_uevent_free(struct dm_uevent *event)
Something went wrong, free the uevent instead of queueing it.
+void dm_uevent_add(struct dm_target *ti, enum kobject_action action, char
*name)
+
+Helper function that builds and queues a uevent if no additional
+variables need to be added.
+
void dm_table_event(struct dm_table *t)
Triggers sending of queued uevents as well as waking up processes waiting on
diff --git a/drivers/md/dm-uevent.c b/drivers/md/dm-uevent.c
index 6a72de7..d139135 100644
--- a/drivers/md/dm-uevent.c
+++ b/drivers/md/dm-uevent.c
@@ -95,6 +95,32 @@ err_nomem:
EXPORT_SYMBOL_GPL(dm_uevent_build);
/**
+ * dm_uevent_add - Create and queue a basic uevent
+ *
+ * @ti: The target to add a uevent for
+ * @action: The kobject action
+ * @name: The name of the uevent to add and queue
+ *
+ * If targets wish to create and queue a uevent but don't need to add
+ * extra vars, they can do so more easily by calling this.
+ * This is usually followed by a call to dm_table_event().
+ */
+void dm_uevent_add(struct dm_target *ti, enum kobject_action action, char
*name)
+{
+ struct mapped_device *md = dm_table_get_md(ti->table);
+ struct dm_uevent *event;
+
+ event = dm_uevent_build(md, ti, action, name);
+ if (IS_ERR(event)) {
+ DMERR("%s: dm_uevent_build() failed", __func__);
+ return;
+ }
+
+ dm_uevent_queue(md, &event->elist);
+}
+EXPORT_SYMBOL_GPL(dm_uevent_add);
+
+/**
* dm_send_uevents - send uevents for given list
*
* @events: list of events to send
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 024207c..c102e29 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -420,6 +420,7 @@ uint32_t dm_get_event_nr(struct mapped_device *md);
int dm_wait_event(struct mapped_device *md, int event_nr);
uint32_t dm_next_uevent_seq(struct mapped_device *md);
void dm_uevent_queue(struct mapped_device *md, struct list_head *elist);
+void dm_uevent_add(struct dm_target *ti, enum kobject_action action, char
*name);
/*
* Info functions.
--
2.7.4
