rbd: preserve snapc->seq in rbd_header_set_snap()
authorAlex Elder <elder@inktank.com>
Thu, 19 Jul 2012 13:49:18 +0000 (08:49 -0500)
committerSage Weil <sage@inktank.com>
Tue, 31 Jul 2012 01:15:42 +0000 (18:15 -0700)
commit78dc447d3ca3701206a1dd813c901556a3fad451
tree244df3c3450069bc09a39fea87a634f93e911227
parent75fe9e19816d6ed3e90f1bd3b741f99bf030e848
rbd: preserve snapc->seq in rbd_header_set_snap()

In rbd_header_set_snap(), there is logic to make the snap context's
seq field get set to a particular snapshot id, or 0 if there is no
snapshot for the rbd image.

This seems to be an artifact of how the current snapshot id for an
rbd_dev was recorded before the rbd_dev->snap_id field began to be
used for that purpose.

There's no need to update the value of snapc->seq here any more, so
stop doing it.  Tidy up a few local variables in that function
while we're at it.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
drivers/block/rbd.c