ldiskfs/kernel_patches/patches/sles12sp3/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/sysfs.c
   4 ===================================================================
   5 --- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/sysfs.c
   6 +++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/sysfs.c
   7 @@ -170,6 +170,8 @@ EXT4_ATTR_FUNC(reserved_clusters, 0644);
   8  EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead,
   9                  ext4_sb_info, s_inode_readahead_blks);
  10  EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
  11 +EXT4_RW_ATTR_SBI_UI(max_dir_size, s_max_dir_size_kb);
  12 +EXT4_RW_ATTR_SBI_UI(max_dir_size_kb, s_max_dir_size_kb);
  13  EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
  14  EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
  15  EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
  16 @@ -199,6 +201,8 @@ static struct attribute *ext4_attrs[] =
  17         ATTR_LIST(reserved_clusters),
  18         ATTR_LIST(inode_readahead_blks),
  19         ATTR_LIST(inode_goal),
  20 +       ATTR_LIST(max_dir_size),
  21 +       ATTR_LIST(max_dir_size_kb),
  22         ATTR_LIST(mb_stats),
  23         ATTR_LIST(mb_max_to_scan),
  24         ATTR_LIST(mb_min_to_scan),
  25 @@ -284,7 +288,9 @@ static ssize_t ext4_attr_show(struct kob
  26                                         le32_to_cpup(ptr));
  27                 else
  28                         return snprintf(buf, PAGE_SIZE, "%u\n",
  29 -                                       *((unsigned int *) ptr));
  30 +                                       strcmp("max_dir_size", a->attr.name) ?
  31 +                                       *((unsigned int *) ptr) :
  32 +                                       (*((unsigned int *) ptr)) << 10);
  33         case attr_pointer_atomic:
  34                 if (!ptr)
  35                         return 0;
  36 @@ -317,6 +323,8 @@ static ssize_t ext4_attr_store(struct ko
  37                 ret = kstrtoul(skip_spaces(buf), 0, &t);
  38                 if (ret)
  39                         return ret;
  40 +               if (strcmp("max_dir_size", a->attr.name) == 0)
  41 +                       t >>= 10;
  42                 if (a->attr_ptr == ptr_ext4_super_block_offset)
  43                         *((__le32 *) ptr) = cpu_to_le32(t);
  44                 else