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-log-writes.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/md/dm-log-writes.c') diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c index 3362d866793b..e4c015dfef43 100644 --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -887,7 +887,8 @@ static int log_writes_iterate_devices(struct dm_target *ti, * Messages supported: * mark - specify the marked data. */ -static int log_writes_message(struct dm_target *ti, unsigned argc, char **argv) +static int log_writes_message(struct dm_target *ti, unsigned argc, char **argv, + char *result, unsigned maxlen) { int r = -EINVAL; struct log_writes_c *lc = ti->private; -- cgit v1.2.3