1 Add a proc interface for max_dir_size.
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)
10 unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset);
11 + unsigned int v = *ui;
13 - return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
14 + if (strcmp("max_dir_size", a->attr.name) == 0)
16 + return snprintf(buf, PAGE_SIZE, "%u\n", v);
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);
24 + if (strcmp("max_dir_size", a->attr.name) == 0)
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),
45 ATTR_LIST(mb_max_to_scan),
46 ATTR_LIST(mb_min_to_scan),