ldiskfs/kernel_patches/patches/rhel6.3/ext4-max-dir-size.patch

   1 Index: linux-2.6.32-el6-beta/fs/ext4/ialloc.c
   2 ===================================================================
   3 --- linux-2.6.32-el6-beta.orig/fs/ext4/ialloc.c
   4 +++ linux-2.6.32-el6-beta/fs/ext4/ialloc.c
   5 @@ -825,11 +825,15 @@ struct inode *ext4_new_inode(handle_t *h
   6         sb = dir->i_sb;
   7         ngroups = ext4_get_groups_count(sb);
   8         trace_ext4_request_inode(dir, mode);
   9 +
  10 +       sbi = EXT4_SB(sb);
  11 +       if (sbi->s_max_dir_size > 0 && i_size_read(dir) >= sbi->s_max_dir_size)
  12 +               return ERR_PTR(-EFBIG);
  13 +
  14         inode = new_inode(sb);
  15         if (!inode)
  16                 return ERR_PTR(-ENOMEM);
  17         ei = EXT4_I(inode);
  18 -       sbi = EXT4_SB(sb);
  19
  20         if (!goal)
  21                 goal = sbi->s_inode_goal;
  22 Index: linux-2.6.32-el6-beta/fs/ext4/super.c
  23 ===================================================================
  24 --- linux-2.6.32-el6-beta.orig/fs/ext4/super.c
  25 +++ linux-2.6.32-el6-beta/fs/ext4/super.c
  26 @@ -2601,6 +2601,7 @@ EXT4_RO_ATTR(lifetime_write_kbytes);
  27  EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show,
  28                  inode_readahead_blks_store, s_inode_readahead_blks);
  29  EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
  30 +EXT4_RW_ATTR_SBI_UI(max_dir_size, s_max_dir_size);
  31  EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
  32  EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
  33  EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
  34 @@ -2615,6 +2616,7 @@ static struct attribute *ext4_attrs[] =
  35         ATTR_LIST(lifetime_write_kbytes),
  36         ATTR_LIST(inode_readahead_blks),
  37         ATTR_LIST(inode_goal),
  38 +       ATTR_LIST(max_dir_size),
  39         ATTR_LIST(mb_stats),
  40         ATTR_LIST(mb_max_to_scan),
  41         ATTR_LIST(mb_min_to_scan),
  42 Index: linux-2.6.32-el6-beta/fs/ext4/ext4.h
  43 ===================================================================
  44 --- linux-2.6.32-el6-beta.orig/fs/ext4/ext4.h
  45 +++ linux-2.6.32-el6-beta/fs/ext4/ext4.h
  46 @@ -1029,6 +1029,8 @@ struct ext4_sb_info {
  47
  48         unsigned int s_log_groups_per_flex;
  49         struct flex_groups *s_flex_groups;
  50 +
  51 +       unsigned long s_max_dir_size;
  52
  53         /* workqueue for dio unwritten */
  54         struct workqueue_struct *dio_unwritten_wq;
  55 @@ -1353,6 +1355,12 @@ struct mmp_struct {
  56  #define EXT4_MMP_MIN_CHECK_INTERVAL    5
  57
  58  /*
  59 + * max directory size tunable
  60 + */
  61 +#define EXT4_DEFAULT_MAX_DIR_SIZE      0
  62 +#define EXT4_MAX_DIR_SIZE_NAME         "max_dir_size"
  63 +
  64 +/*
  65   * Function prototypes
  66   */
  67