tree fceea4beb94bb819577ea410919c2b603ddef30f
parent 620917de59eeb934b9f8cf35cc2d95c1ac8ed0fc
author Benjamin Marzinski <bmarzins@redhat.com> 1307993260 -0500
committer Steven Whitehouse <swhiteho@redhat.com> 1310458524 +0100

GFS2: force a log flush when invalidating the rindex glock

Right now, there is nothing that forces the log to get flushed when a node
drops its rindex glock so that another node can grow the filesystem. If the
log doesn't get flushed, GFS2 can corrupt the sd_log_le_rg list in the
following way.

A node puts an rgd on the list in rg_lo_add(), and then the rindex glock is
dropped so the other node can grow the filesystem. When the node reacquires the
rindex glock, that rgd gets deleted in clear_rgrpdi() before ever being
removed from the list by gfs2_log_flush().

This code simply forces a log flush when the rindex glock is invalidated,
solving the problem.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>