ldiskfs/kernel_patches/patches/rhel7/ext4-max-dir-size.patch

   1 Add a proc interface for max_dir_size.
   2
   3 Index: linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/super.c
   4 ===================================================================
   5 --- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/super.c
   6 +++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/super.c
   7 @@ -2476,8 +2476,11 @@ static ssize_t sbi_ui_show(struct ext4_a
   8                            struct ext4_sb_info *sbi, char *buf)
   9  {
  10         unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset);
  11 +       unsigned int v = *ui;
  12
  13 -       return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
  14 +       if (strcmp("max_dir_size", a->attr.name) == 0)
  15 +               v <<= 10;
  16 +       return snprintf(buf, PAGE_SIZE, "%u\n", v);
  17  }
  18
  19  static ssize_t sbi_ui_store(struct ext4_attr *a,
  20 @@ -2491,6 +2494,8 @@ static ssize_t sbi_ui_store(struct ext4_
  21         ret = kstrtoul(skip_spaces(buf), 0, &t);
  22         if (ret)
  23                 return ret;
  24 +       if (strcmp("max_dir_size", a->attr.name) == 0)
  25 +               t >>= 10;
  26         *ui = t;
  27         return count;
  28  }
  29 @@ -2557,6 +2562,8 @@ EXT4_RW_ATTR(reserved_clusters);
  30  EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show,
  31                  inode_readahead_blks_store, s_inode_readahead_blks);
  32  EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
  33 +EXT4_RW_ATTR_SBI_UI(max_dir_size, s_max_dir_size_kb);
  34 +EXT4_RW_ATTR_SBI_UI(max_dir_size_kb, s_max_dir_size_kb);
  35  EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
  36  EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
  37  EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
  38 @@ -2581,6 +2588,8 @@ static struct attribute *ext4_attrs[] =
  39         ATTR_LIST(reserved_clusters),
  40         ATTR_LIST(inode_readahead_blks),
  41         ATTR_LIST(inode_goal),
  42 +       ATTR_LIST(max_dir_size),
  43 +       ATTR_LIST(max_dir_size_kb),
  44         ATTR_LIST(mb_stats),
  45         ATTR_LIST(mb_max_to_scan),
  46         ATTR_LIST(mb_min_to_scan),