ldiskfs/kernel_patches/patches/ext4-force_over_8tb-sles11.patch

   1 Index: linux-2.6.27.21-0.1/fs/ext4/super.c
   2 ===================================================================
   3 --- linux-2.6.27.21-0.1.orig/fs/ext4/super.c    2009-07-07 15:00:32.000000000 +0530
   4 +++ linux-2.6.27.21-0.1/fs/ext4/super.c 2009-07-07 15:01:30.000000000 +0530
   5 @@ -52,6 +52,8 @@
   6
   7  struct proc_dir_entry *ext4_proc_root;
   8
   9 +static int force_over_8tb;
  10 +
  11  static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
  12                              unsigned long journal_devnum);
  13  static int ext4_create_journal(struct super_block *, struct ext4_super_block *,
  14 @@ -1287,7 +1289,7 @@
  15         Opt_inode_readahead_blks, Opt_journal_ioprio,
  16         Opt_discard, Opt_nodiscard, Opt_bigendian_extents,
  17         Opt_iopen, Opt_noiopen, Opt_iopen_nopriv,
  18 -       Opt_mballoc, Opt_extents,
  19 +       Opt_mballoc, Opt_force_over_8tb, Opt_extents,
  20  };
  21
  22  static match_table_t tokens = {
  23 @@ -1349,6 +1351,7 @@
  24         {Opt_nodiscard, "nodiscard"},
  25         {Opt_bigendian_extents, "bigendian_extents"},
  26         {Opt_mballoc, "mballoc"},
  27 +       {Opt_force_over_8tb, "force_over_8tb"},
  28         {Opt_err, NULL},
  29  };
  30
  31 @@ -1773,6 +1776,9 @@
  32                         break;
  33                 case Opt_mballoc:
  34                         break;
  35 +               case Opt_force_over_8tb:
  36 +                       force_over_8tb = 1;
  37 +                       break;
  38                 default:
  39                         ext4_msg(sb, KERN_ERR,
  40                                "Unrecognized mount option \"%s\" "
  41 @@ -2634,6 +2640,17 @@
  42                 goto failed_mount;
  43         }
  44
  45 +       if (ext4_blocks_count(es) >
  46 +           ((0x80000000000ULL >> sb->s_blocksize_bits) - 1)) {
  47 +               if (force_over_8tb == 0) {
  48 +                       printk(KERN_ERR "EXT4-fs does not support filesystems "
  49 +                              "greater than 8TB and can cause data corruption."
  50 +                              "Use \"force_over_8tb\" mount option to override."
  51 +                              "\n");
  52 +                       goto failed_mount;
  53 +               }
  54 +       }
  55 +
  56         if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
  57                 goto cantfind_ext4;
  58