[PATCH 03/71] xfs: count the blocks in a btree
"Darrick J. Wong" <[email protected]>
| Newsgroups | gmane.comp.file-systems.xfs.general |
|---|---|
| Message-ID | <[email protected]> |
Provide a helper method to count the number of blocks in a short form btree. The refcount and rmap btrees need to know the number of blocks already in use to set up their per-AG block reservations during mount. v2: Use btree_visit_blocks instead of open-coding our own traversal routine. Signed-off-by: Darrick J. Wong <[email protected]> --- libxfs/xfs_btree.c | 23 +++++++++++++++++++++++ libxfs/xfs_btree.h | 2 ++ 2 files changed, 25 insertions(+) diff --git a/libxfs/xfs_btree.c b/libxfs/xfs_btree.c index b3e2ce9..43c809f 100644 --- a/libxfs/xfs_btree.c +++ b/libxfs/xfs_btree.c @@ -4821,3 +4821,26 @@ xfs_btree_calc_size( } return rval; } + +int +xfs_btree_count_blocks_helper( + struct xfs_btree_cur *cur, + int level, + void *data) +{ + xfs_extlen_t *blocks = data; + (*blocks)++; + + return 0; +} + +/* Count the blocks in a btree and return the result in *blocks. */ +int +xfs_btree_count_blocks( + struct xfs_btree_cur *cur, + xfs_extlen_t *blocks) +{ + *blocks = 0; + return xfs_btree_visit_blocks(cur, xfs_btree_count_blocks_helper, + blocks); +} diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h index 607463a..be4a0c1 100644 --- a/libxfs/xfs_btree.h +++ b/libxfs/xfs_btree.h @@ -519,4 +519,6 @@ typedef int (*xfs_btree_visit_blocks_fn)(struct xfs_btree_cur *cur, int level, int xfs_btree_visit_blocks(struct xfs_btree_cur *cur, xfs_btree_visit_blocks_fn fn, void *data); +int xfs_btree_count_blocks(struct xfs_btree_cur *cur, xfs_extlen_t *blocks); + #endif /* __XFS_BTREE_H__ */ _______________________________________________ xfs mailing list [email protected] http://oss.sgi.com/mailman/listinfo/xfs