ldiskfs/kernel_patches/patches/ext4-force_over_8tb-rhel5.patch

   1 Index: linux-2.6.18-128.1.6/fs/ext4/super.c
   2 ===================================================================
   3 --- linux-2.6.18-128.1.6.orig/fs/ext4/super.c
   4 +++ linux-2.6.18-128.1.6/fs/ext4/super.c
   5 @@ -47,6 +47,8 @@
   6  #include "namei.h"
   7  #include "group.h"
   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 @@ -1227,6 +1229,7 @@ enum {
  15         Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
  16         Opt_mballoc, Opt_nomballoc, Opt_stripe,
  17         Opt_iopen, Opt_noiopen, Opt_iopen_nopriv, Opt_bigendian_extents,
  18 +       Opt_force_over_8tb,
  19  };
  20
  21  static match_table_t tokens = {
  22 @@ -1289,6 +1292,7 @@ static match_table_t tokens = {
  23         {Opt_stripe, "stripe=%u"},
  24         {Opt_resize, "resize"},
  25         {Opt_bigendian_extents, "bigendian_extents"},
  26 +       {Opt_force_over_8tb, "force_over_8tb"},
  27         {Opt_err, NULL},
  28  };
  29
  30 @@ -1690,6 +1694,9 @@ clear_qf_name:
  31                 case Opt_bigendian_extents:
  32                         bigendian_extents = 1;
  33                         break;
  34 +               case Opt_force_over_8tb:
  35 +                       force_over_8tb = 1;
  36 +                       break;
  37                 default:
  38                         printk(KERN_ERR
  39                                "EXT4-fs: Unrecognized mount option \"%s\" "
  40 @@ -2534,6 +2541,17 @@ static int ext4_fill_super(struct super_
  41                 goto failed_mount;
  42         }
  43
  44 +       if (ext4_blocks_count(es) >
  45 +           ((0x80000000000ULL >> sb->s_blocksize_bits) - 1)) {
  46 +               if (force_over_8tb == 0) {
  47 +                       printk(KERN_ERR "EXT4-fs does not support filesystems "
  48 +                              "greater than 8TB and can cause data corruption."
  49 +                              "Use \"force_over_8tb\" mount option to override."
  50 +                              "\n");
  51 +                       goto failed_mount;
  52 +               }
  53 +       }
  54 +
  55         if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
  56                 goto cantfind_ext4;
  57