git: hammer2 - Fix freemap bugs
dillon at crater.dragonflybsd.org
Mon Aug 5 23:03:58 PDT 2013
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date: Mon Aug 5 22:50:51 2013 -0700
hammer2 - Fix freemap bugs
* The linear iterator must not be used if aligned on an allocation
chunk (16K) boundary. Reserved areas just set the bitmap to all 1's
but were leaving the iterator set to 0. Fix both the boundary check
and initialized bmap->linear for reserved areas to HAMMER2_SEGSIZE.
This fixes a corruption issue where allocates were being made out of
reserved areas and then overwritten by e.g. the freemap, and where
the linear iterator would reallocate areas already allocated via the
* Fix the code which marks device bufferse B_CACHE when freshly allocated.
It wasn't handling the 32KB case properly.
* Our pre-caching gets and releases a block. B_CACHE must be used in addition
to calling vfs_bio_clrbuf() because we aren't holding onto the locked buffer.
Summary of changes:
sys/vfs/hammer2/hammer2_freemap.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
DragonFly BSD source repository
More information about the Commits