e2fsck: check the checksum seed feature flag is set correctly

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index a7da94d..971b0ad 100644 (file)
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -467,6 +467,11 @@ static struct e2fsck_problem problem_table[] = {
          N_("External @j @S checksum does not match @S.  "),
          PROMPT_FIX, PR_PREEN_OK },
 
+       /* metadata_csum_seed means nothing without metadata_csum */
+       { PR_0_CSUM_SEED_WITHOUT_META_CSUM,
+         N_("@S metadata_csum_seed is not necessary without metadata_csum."),
+         PROMPT_FIX, PR_PREEN_OK | PR_NO_OK},
+
        /* Pass 1 errors */
 
        /* Pass 1: Checking inodes, blocks, and sizes */

diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index 3b92e41..b3f5b8f 100644 (file)
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -268,6 +268,9 @@ struct problem_context {
 /* External journal has corrupt superblock */
 #define PR_0_EXT_JOURNAL_SUPER_CSUM_INVALID    0x00004A
 
+/* metadata_csum_seed means nothing without metadata_csum */
+#define PR_0_CSUM_SEED_WITHOUT_META_CSUM       0x00004B
+
 /*
  * Pass 1 errors
  */

diff --git a/e2fsck/super.c b/e2fsck/super.c
index af6d680..e09c14c 100644 (file)
--- a/e2fsck/super.c
+++ b/e2fsck/super.c
@@ -589,6 +589,15 @@ void check_super_block(e2fsck_t ctx)
                        ext2fs_group_desc_csum_set(fs, i);
        }
 
+       /* We can't have ^metadata_csum,metadata_csum_seed */
+       if (!ext2fs_has_feature_metadata_csum(fs->super) &&
+           ext2fs_has_feature_csum_seed(fs->super) &&
+           fix_problem(ctx, PR_0_CSUM_SEED_WITHOUT_META_CSUM, &pctx)) {
+               ext2fs_clear_feature_csum_seed(fs->super);
+               fs->super->s_checksum_seed = 0;
+               ext2fs_mark_super_dirty(fs);
+       }
+
        /* Is 64bit set and extents unset? */
        if (ext2fs_has_feature_64bit(fs->super) &&
            !ext2fs_has_feature_extents(fs->super) &&