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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-09-19 10:25:20 +1000 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-09-19 10:25:20 +1000 |
| commit | c611cc0360cd924448c23ccd70ce8be703fcb4a6 (patch) | |
| tree | 8b421e59d4ebc171b0d7038d957cfd2b824c8db3 /fs/xfs | |
| parent | 4ed3f68792f6a9c21a290ae777565e7562a09653 (diff) | |
| download | linux-stable-c611cc0360cd924448c23ccd70ce8be703fcb4a6.tar.gz linux-stable-c611cc0360cd924448c23ccd70ce8be703fcb4a6.tar.bz2 linux-stable-c611cc0360cd924448c23ccd70ce8be703fcb4a6.zip | |
xfs: count the blocks in a btree
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.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_btree.c | 23 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_btree.h | 2 |
2 files changed, 25 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index 50cfb98719dd..aa1752f918b8 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/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/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h index 1c148f5c5675..3f8556a5c2ad 100644 --- a/fs/xfs/libxfs/xfs_btree.h +++ b/fs/xfs/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__ */ |