Generate uevents when thin pool devices hit data or metadata low water
marks, and when pool mode changes.
Signed-off-by: Andy Grover <agrover@xxxxxxxxxx>
---
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
--
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