diff options
Diffstat (limited to 'fs/xfs/scrub/bitmap.c')
-rw-r--r-- | fs/xfs/scrub/bitmap.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/xfs/scrub/bitmap.c b/fs/xfs/scrub/bitmap.c index af874c9febd5..142041519326 100644 --- a/fs/xfs/scrub/bitmap.c +++ b/fs/xfs/scrub/bitmap.c @@ -345,3 +345,25 @@ xbitmap_count_set_regions( return nr; } + +/* Is the start of the range set or clear? And for how long? */ +bool +xbitmap_test( + struct xbitmap *bitmap, + uint64_t start, + uint64_t *len) +{ + struct xbitmap_node *bn; + uint64_t last = start + *len - 1; + + bn = xbitmap_tree_iter_first(&bitmap->xb_root, start, last); + if (!bn) + return false; + if (bn->bn_start <= start) { + if (bn->bn_last < last) + *len = bn->bn_last - start + 1; + return true; + } + *len = bn->bn_start - start; + return false; +} |