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13 June 2022, 11:31:42 UTC
Revision 69bca40d41c613927b150c5392505f1894fe3010 authored by Alexander Block on 19 June 2012, 13:42:26 UTC, committed by Chris Mason on 21 June 2012, 11:19:34 UTC 
Btrfs: don't assume to be on the correct extent in add_all_parents
 
add_all_parents did assume that path is already at a correct extent data
item, which may not be true in case of data extents that were partly
rewritten and splitted.

We need to check if we're on a matching extent for every item and only
for the ones after the first. The loop is changed to do this now.

This patch also fixes a bug introduced with commit 3b127fd8 "Btrfs:
remove obsolete btrfs_next_leaf call from __resolve_indirect_ref".
The removal of next_leaf did sometimes result in slot==nritems when
the above described case happens, and thus resulting in invalid values
(e.g. wanted_obejctid) in add_all_parents (leading to missed backrefs
or even crashes).

Signed-off-by: Alexander Block <ablock84@googlemail.com>
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
1 parent 1c8f52a
History
Tip revision: 69bca40d41c613927b150c5392505f1894fe3010 authored by Alexander Block on 19 June 2012, 13:42:26 UTC
Btrfs: don't assume to be on the correct extent in add_all_parents
Tip revision: 69bca40
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