ldiskfs/kernel_patches/patches/rhel6.3/ext4-pdir-fix.patch

   1 Index: linux-stage/fs/ext4/ext4.h
   2 ===================================================================
   3 --- linux-stage.orig/fs/ext4/ext4.h     2012-08-07 11:52:38.994200699 -0700
   4 +++ linux-stage/fs/ext4/ext4.h  2012-08-07 12:28:19.497442862 -0700
   5 @@ -706,6 +707,9 @@
   6         __u32   i_dtime;
   7         ext4_fsblk_t    i_file_acl;
   8
   9 +       /* following fields for parallel directory operations -bzzz */
  10 +       struct semaphore i_append_sem;
  11 +
  12         /*
  13          * i_block_group is the number of the block group which contains
  14          * this file's inode.  Constant across the lifetime of the inode,
  15 Index: linux-stage/fs/ext4/namei.c
  16 ===================================================================
  17 --- linux-stage.orig/fs/ext4/namei.c    2012-08-07 11:52:38.992199430 -0700
  18 +++ linux-stage/fs/ext4/namei.c 2012-08-07 12:27:24.845281099 -0700
  19 @@ -53,6 +53,11 @@
  20                                         ext4_lblk_t *block, int *err)
  21  {
  22         struct buffer_head *bh;
  23 +       struct ext4_inode_info *ei = EXT4_I(inode);
  24 +
  25 +       /* with parallel dir operations all appends
  26 +       * have to be serialized -bzzz */
  27 +       down(&ei->i_append_sem);
  28
  29         *block = inode->i_size >> inode->i_sb->s_blocksize_bits;
  30
  31 @@ -65,7 +70,9 @@
  32                         brelse(bh);
  33                         bh = NULL;
  34                 }
  35 +               ei->i_disksize = inode->i_size;
  36         }
  37 +       up(&ei->i_append_sem);
  38         return bh;
  39  }
  40
  41 Index: linux-stage/fs/ext4/super.c
  42 ===================================================================
  43 --- linux-stage.orig/fs/ext4/super.c    2012-08-07 11:52:39.009197356 -0700
  44 +++ linux-stage/fs/ext4/super.c 2012-08-07 12:28:29.499112997 -0700
  45 @@ -749,6 +749,7 @@
  46
  47         ei->vfs_inode.i_version = 1;
  48         ei->vfs_inode.i_data.writeback_index = 0;
  49 +       sema_init(&ei->i_append_sem, 1);
  50         memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
  51         INIT_LIST_HEAD(&ei->i_prealloc_list);
  52         spin_lock_init(&ei->i_prealloc_lock);