debugfs: print htree internal node checksums

Print htree node checksums when dumping a directory index.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/debugfs/htree.c b/debugfs/htree.c
index 05745eb..2fb804e 100644 (file)
--- a/debugfs/htree.c
+++ b/debugfs/htree.c
@@ -120,8 +120,9 @@ static void htree_dump_int_node(ext2_filsys fs, ext2_ino_t ino,
 {
        struct ext2_dx_countlimit       limit;
        struct ext2_dx_entry            e;
+       struct ext2_dx_tail             *tail;
        int                             hash, i;
-
+       int                             remainder;
 
        limit = *((struct ext2_dx_countlimit *) ent);
        limit.count = ext2fs_le16_to_cpu(limit.count);
@@ -130,6 +131,20 @@ static void htree_dump_int_node(ext2_filsys fs, ext2_ino_t ino,
        fprintf(pager, "Number of entries (count): %d\n", limit.count);
        fprintf(pager, "Number of entries (limit): %d\n", limit.limit);
 
+       remainder = fs->blocksize - (limit.limit *
+                                    sizeof(struct ext2_dx_entry));
+       if (ent == (struct ext2_dx_entry *)(rootnode + 1))
+               remainder -= sizeof(struct ext2_dx_root_info) + 24;
+       else
+               remainder -= 8;
+       if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+                                      EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
+           remainder == sizeof(struct ext2_dx_tail)) {
+               tail = (struct ext2_dx_tail *)(ent + limit.limit);
+               fprintf(pager, "Checksum: 0x%08x\n",
+                       ext2fs_le32_to_cpu(tail->dt_checksum));
+       }
+
        for (i=0; i < limit.count; i++) {
                hash = i ? ext2fs_le32_to_cpu(ent[i].hash) : 0;
                fprintf(pager, "Entry #%d: Hash 0x%08x%s, block %u\n", i,