erofs-utils: lib: fix insufficient fragment cache bitmap

.. should round up to the nearest byte instead of down.

Fixes: f511cfbbc0da ("erofs-utils: introduce fragment cache")
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250308173523.3696606-1-hsiangkao@linux.alibaba.com

diff --git a/lib/fragments.c b/lib/fragments.c
index 05bbf0dc4c066fe602ca047d28e2d94d438894e4..d300439ed88c757a42d3ae7c7e506132f625641e 100644 (file)
--- a/lib/fragments.c
+++ b/lib/fragments.c
@@ -402,7 +402,7 @@ int erofs_packedfile_init(struct erofs_sb_info *sbi, bool fragments_mkfs)
                        err = -errno;
                        goto err_out;
                }
-               epi->uptodate_size = BLK_ROUND_UP(sbi, ei.i_size) / 8;
+               epi->uptodate_size = DIV_ROUND_UP(BLK_ROUND_UP(sbi, ei.i_size), 8);
                epi->uptodate = calloc(1, epi->uptodate_size);
                if (!epi->uptodate) {
                        err = -ENOMEM;