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xfs: add refcount btree operations

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Implement the generic btree operations required to manipulate refcount
btree blocks.  The implementation is similar to the bmapbt, though it
will only allocate and free blocks from the AG.

Since the refcount root and level fields are separate from the
existing roots and levels array, they need a separate logging flag.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
[hch: fix logging of AGF refcount btree fields]
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong
2016-10-03 09:11:19 -07:00
parent f310bd2ecd
commit bdf28630b7
6 changed files with 430 additions and 2 deletions
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3
fs/xfs/libxfs/xfs_alloc.c
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@@ -2334,6 +2334,9 @@ xfs_alloc_log_agf(
offsetof(xfs_agf_t, agf_btreeblks),
offsetof(xfs_agf_t, agf_uuid),
offsetof(xfs_agf_t, agf_rmap_blocks),
offsetof(xfs_agf_t, agf_refcount_blocks),
offsetof(xfs_agf_t, agf_refcount_root),
offsetof(xfs_agf_t, agf_refcount_level),
/* needed so that we don't log the whole rest of the structure: */
offsetof(xfs_agf_t, agf_spare64),
sizeof(xfs_agf_t)