ldiskfs/kernel_patches/patches/suse15/ext4-dont-check-before-replay.patch

   1 commit a70b020e5b2f1bbe3b759232852beaac4f0852b5
   2 Author:     Lokesh Nagappa Jaliminche <lokesh.jaliminche@seagate.com>
   3 AuthorDate: Fri Nov 25 16:17:09 2016 +0530
   4 LU-8364 ext4: fixes for failover mode.
   5
   6 When ext4 runs in failover mode with read-only disk,
   7 it may loose part of allocation updates and fail while
   8 mounting fs due to group descriptor checks before journal
   9 replay not being valid after journal replay is complete.
  10 Don't produce panics with on disk checks in read-only mode.
  11
  12 Seagate-bug-id: MRP-797
  13 Change-Id: I54bee3a0aeb9a15f5ee2a79f7a2a2a905f19af1a
  14 Signed-off-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
  15 Signed-off-by: Lokesh Nagappa Jaliminche <lokesh.jaliminche@seagate.com>
  16 Reviewed-on: https://review.whamcloud.com/21141
  17 ---
  18  fs/ext4/super.c | 12 +++++++-----
  19  1 file changed, 7 insertions(+), 5 deletions(-)
  20
  21 diff --git a/fs/ext4/super.c b/fs/ext4/super.c
  22 index 6ea4936..134308f 100644
  23 --- a/fs/ext4/super.c
  24 +++ b/fs/ext4/super.c
  25 @@ -4145,11 +4145,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
  26                 }
  27         }
  28         sbi->s_gdb_count = db_count;
  29 -       if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
  30 -               ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
  31 -               ret = -EFSCORRUPTED;
  32 -               goto failed_mount2;
  33 -       }
  34         get_random_bytes(&sbi->s_next_generation, sizeof(u32));
  35         spin_lock_init(&sbi->s_next_gen_lock);
  36
  37 @@ -4289,6 +4284,13 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
  38         sbi->s_journal->j_commit_callback = ext4_journal_commit_callback;
  39
  40  no_journal:
  41 +
  42 +       if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
  43 +               ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
  44 +               ret = -EFSCORRUPTED;
  45 +               goto failed_mount_wq;
  46 +       }
  47 +
  48         sbi->s_mb_cache = ext4_xattr_create_cache();
  49         if (!sbi->s_mb_cache) {
  50                 ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache");
  51 --
  52 2.20.1
  53