ldiskfs/kernel_patches/patches/ubuntu18/ext4-dont-check-before-replay.patch

   1 When ldiskfs run in failover mode whith read-only disk.
   2 Part of allocation updates are lost and ldiskfs may fail
   3 while mounting this is due to inconsistent state of
   4 group-descriptor. Group-descriptor check is added after
   5 journal replay.
   6
   7 Index: linux-4.15.0/fs/ext4/super.c
   8 ===================================================================
   9 --- linux-4.15.0.orig/fs/ext4/super.c
  10 +++ linux-4.15.0/fs/ext4/super.c
  11 @@ -4051,11 +4051,6 @@ static int ext4_fill_super(struct super_
  12                         goto failed_mount2;
  13                 }
  14         }
  15 -       if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
  16 -               ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
  17 -               ret = -EFSCORRUPTED;
  18 -               goto failed_mount2;
  19 -       }
  20
  21         sbi->s_gdb_count = db_count;
  22
  23 @@ -4196,6 +4191,13 @@ static int ext4_fill_super(struct super_
  24         sbi->s_journal->j_commit_callback = ext4_journal_commit_callback;
  25
  26  no_journal:
  27 +
  28 +       if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
  29 +               ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
  30 +               ret = -EFSCORRUPTED;
  31 +               goto failed_mount_wq;
  32 +       }
  33 +
  34         if (!test_opt(sb, NO_MBCACHE)) {
  35                 sbi->s_ea_block_cache = ext4_xattr_create_cache();
  36                 if (!sbi->s_ea_block_cache) {