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| author | Mike Snitzer <snitzer@redhat.com> | 2018-02-28 15:59:59 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-04-03 15:04:10 -0400 |
| commit | 1eb5fa849f2bf9186a618e85bea23f02e527540a (patch) | |
| tree | b0f5e85395f06f86e7db283155c5f73a5b942c8b /drivers/md/dm-ioctl.c | |
| parent | da5dadb4f11660ca67580cd4a7420161266d6254 (diff) | |
| download | lwn-1eb5fa849f2bf9186a618e85bea23f02e527540a.tar.gz lwn-1eb5fa849f2bf9186a618e85bea23f02e527540a.zip | |
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 <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-ioctl.c')
| -rw-r--r-- | drivers/md/dm-ioctl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index a89fd8f44453..5acf77de5945 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -1595,7 +1595,7 @@ static int target_message(struct file *filp, struct dm_ioctl *param, size_t para DMWARN("Target message sector outside device."); r = -EINVAL; } else if (ti->type->message) - r = ti->type->message(ti, argc, argv); + r = ti->type->message(ti, argc, argv, result, maxlen); else { DMWARN("Target type does not support messages"); r = -EINVAL; |