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xfs: add repair helpers for the reference count btree

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Add a couple of functions to the refcount btree and generic btree code
that will be used to repair the refcountbt.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2018-05-09 10:02:03 -07:00
parent 4d4f86b49f
commit 08daa3ccf5
4 changed files with 41 additions and 0 deletions
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17
fs/xfs/libxfs/xfs_refcount.c
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@@ -88,6 +88,23 @@ xfs_refcount_lookup_ge(
return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
}
/*
* Look up the first record equal to [bno, len] in the btree
* given by cur.
*/
int
xfs_refcount_lookup_eq(
struct xfs_btree_cur *cur,
xfs_agblock_t bno,
int *stat)
{
trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_private.a.agno, bno,
XFS_LOOKUP_LE);
cur->bc_rec.rc.rc_startblock = bno;
cur->bc_rec.rc.rc_blockcount = 0;
return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
}
/* Convert on-disk record to in-core format. */
void
xfs_refcount_btrec_to_irec(