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authorDarrick J. Wong <darrick.wong@oracle.com>2018-05-29 22:18:09 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2018-05-30 08:03:14 -0700
commit64a39d876e77264dbd06ec27564d9e4eed1c6786 (patch)
tree0120120ceb502bd8d6dd4ee6554f8cba76bc873c /fs/open.c
parent73d6b42aa4dcdd7cdc07a945f035b0c1ca48f891 (diff)
downloadlinux-64a39d876e77264dbd06ec27564d9e4eed1c6786.tar.bz2
xfs: add helpers to collect and sift btree block pointers during repair
Add some helpers to assemble a list of fs block extents. Generally, repair functions will iterate the rmapbt to make a list (1) of all extents owned by the nominal owner of the metadata structure; then they will iterate all other structures with the same rmap owner to make a list (2) of active blocks; and finally we have a subtraction function to subtract all the blocks in (2) from (1), with the result that (1) is now a list of blocks that were owned by the old btree and must be disposed. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
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