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xfs: add helpers to calculate btree size
Add a bunch of helper functions that calculate the sizes of various btrees. These will be used to repair btrees and btree headers. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
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@ -547,3 +547,12 @@ xfs_allocbt_maxrecs(
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return blocklen / sizeof(xfs_alloc_rec_t);
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return blocklen / (sizeof(xfs_alloc_key_t) + sizeof(xfs_alloc_ptr_t));
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}
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/* Calculate the freespace btree size for some records. */
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xfs_extlen_t
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xfs_allocbt_calc_size(
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struct xfs_mount *mp,
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unsigned long long len)
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{
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return xfs_btree_calc_size(mp->m_alloc_mnr, len);
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}
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@ -61,5 +61,7 @@ extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,
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struct xfs_trans *, struct xfs_buf *,
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xfs_agnumber_t, xfs_btnum_t);
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extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
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extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp,
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unsigned long long len);
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#endif /* __XFS_ALLOC_BTREE_H__ */
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@ -660,3 +660,12 @@ xfs_bmbt_change_owner(
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xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
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return error;
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}
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/* Calculate the bmap btree size for some records. */
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unsigned long long
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xfs_bmbt_calc_size(
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struct xfs_mount *mp,
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unsigned long long len)
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{
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return xfs_btree_calc_size(mp->m_bmap_dmnr, len);
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}
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@ -118,4 +118,7 @@ extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
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extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
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struct xfs_trans *, struct xfs_inode *, int);
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extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
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unsigned long long len);
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#endif /* __XFS_BMAP_BTREE_H__ */
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@ -4836,14 +4836,14 @@ xfs_btree_query_all(
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* Calculate the number of blocks needed to store a given number of records
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* in a short-format (per-AG metadata) btree.
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*/
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xfs_extlen_t
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unsigned long long
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xfs_btree_calc_size(
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uint *limits,
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unsigned long long len)
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{
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int level;
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int maxrecs;
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xfs_extlen_t rval;
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unsigned long long rval;
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maxrecs = limits[0];
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for (level = 0, rval = 0; len > 1; level++) {
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@ -482,7 +482,7 @@ xfs_failaddr_t xfs_btree_lblock_verify(struct xfs_buf *bp,
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unsigned int max_recs);
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uint xfs_btree_compute_maxlevels(uint *limits, unsigned long len);
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xfs_extlen_t xfs_btree_calc_size(uint *limits, unsigned long long len);
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unsigned long long xfs_btree_calc_size(uint *limits, unsigned long long len);
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/* return codes */
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#define XFS_BTREE_QUERY_RANGE_CONTINUE 0 /* keep iterating */
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@ -608,3 +608,12 @@ xfs_finobt_calc_reserves(
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*used += tree_len;
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return 0;
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}
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/* Calculate the inobt btree size for some records. */
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xfs_extlen_t
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xfs_iallocbt_calc_size(
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struct xfs_mount *mp,
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unsigned long long len)
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{
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return xfs_btree_calc_size(mp->m_inobt_mnr, len);
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}
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@ -74,5 +74,7 @@ int xfs_inobt_rec_check_count(struct xfs_mount *,
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int xfs_finobt_calc_reserves(struct xfs_mount *mp, xfs_agnumber_t agno,
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xfs_extlen_t *ask, xfs_extlen_t *used);
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extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
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unsigned long long len);
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#endif /* __XFS_IALLOC_BTREE_H__ */
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