From: Luis de Bethencourt Date: Tue, 9 Aug 2016 21:23:36 +0000 (+0100) Subject: befs: add check for ag_shift in superblock X-Git-Tag: v4.9-rc1~1^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bbe1bd0b6bba138eaf441c6c964bde9866da8808;p=platform%2Fkernel%2Flinux-exynos.git befs: add check for ag_shift in superblock ag_shift and blocks_per_ag contain the same information in different ways, same as block_shift and block_size do. It is worth checking this two are consistent, but since blocks_per_ag isn't documented as mandatory to use some implementations of befs don't enforce this, so making it non-fatal if they don't match and just having it as a warning. Signed-off-by: Luis de Bethencourt Signed-off-by: Salah Triki --- diff --git a/fs/befs/super.c b/fs/befs/super.c index dc13df8..c36745d 100644 --- a/fs/befs/super.c +++ b/fs/befs/super.c @@ -103,6 +103,13 @@ befs_check_sb(struct super_block *sb) return BEFS_ERR; } + + /* ag_shift also encodes the same information as blocks_per_ag in a + * different way, non-fatal consistency check + */ + if ((1 << befs_sb->ag_shift) != befs_sb->blocks_per_ag) + befs_error(sb, "ag_shift disagrees with blocks_per_ag."); + if (befs_sb->log_start != befs_sb->log_end || befs_sb->flags == BEFS_DIRTY) { befs_error(sb, "Filesystem not clean! There are blocks in the " "journal. You must boot into BeOS and mount this volume "