[PATCH 8/9] dm: Generate uevents for thin targets

[Andy Grover]

Generate uevents when thin pool devices hit data or metadata low water
marks, and when pool mode changes.

Signed-off-by: Andy Grover <agro...@redhat.com>
---
 drivers/md/dm-thin.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index d1c05c1..0778a2a 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -1429,6 +1429,7 @@ static void check_low_water_mark(struct pool *pool, 
dm_block_t free_blocks)
                spin_lock_irqsave(&pool->lock, flags);
                pool->low_water_triggered = true;
                spin_unlock_irqrestore(&pool->lock, flags);
+               dm_uevent_add(pool->ti, KOBJ_CHANGE, "THIN_LOW_WATER_DATA");
                dm_table_event(pool->ti->table);
        }
 }
@@ -2397,6 +2398,7 @@ static enum pool_mode get_pool_mode(struct pool *pool)
 
 static void notify_of_pool_mode_change(struct pool *pool, const char *new_mode)
 {
+       dm_uevent_add(pool->ti, KOBJ_CHANGE, "THIN_POOL_MODE");
        dm_table_event(pool->ti->table);
        DMINFO("%s: switching pool to %s mode",
               dm_device_name(pool->pool_md), new_mode);
@@ -3095,6 +3097,7 @@ static void metadata_low_callback(void *context)
        DMWARN("%s: reached low water mark for metadata device: sending event.",
               dm_device_name(pool->pool_md));
 
+       dm_uevent_add(pool->ti, KOBJ_CHANGE, "THIN_LOW_WATER_METADATA");
        dm_table_event(pool->ti->table);
 }
 
-- 
2.7.4