From 1eb5fa849f2bf9186a618e85bea23f02e527540a Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Wed, 28 Feb 2018 15:59:59 -0500 Subject: dm: allow targets to return output from messages they are sent Could be useful for a target to return stats or other information. If a target does DMEMIT() anything to @result from its .message method then it must return 1 to the caller. Signed-off-By: Mike Snitzer --- drivers/md/dm-thin.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/md/dm-thin.c') diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index 629c555890c1..b11107497d2e 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -3705,7 +3705,8 @@ static int process_release_metadata_snap_mesg(unsigned argc, char **argv, struct * reserve_metadata_snap * release_metadata_snap */ -static int pool_message(struct dm_target *ti, unsigned argc, char **argv) +static int pool_message(struct dm_target *ti, unsigned argc, char **argv, + char *result, unsigned maxlen) { int r = -EINVAL; struct pool_c *pt = ti->private; -- cgit v1.2.1