33 static void set_empty_dir(struct ctl_dir *dir)  in set_empty_dir()  argument
35 	dir->header.ctl_table[0].child = sysctl_mount_point;  in set_empty_dir()
38 static void clear_empty_dir(struct ctl_dir *dir)  in clear_empty_dir()  argument
41 	dir->header.ctl_table[0].child = NULL;  in clear_empty_dir()
61 	.default_set.dir.header = {
79 static void sysctl_print_dir(struct ctl_dir *dir)  in sysctl_print_dir()  argument
81 	if (dir->header.parent)  in sysctl_print_dir()
82 		sysctl_print_dir(dir->header.parent);  in sysctl_print_dir()
83 	pr_cont("%s/", dir->header.ctl_table[0].procname);  in sysctl_print_dir()
103 	struct ctl_dir *dir, const char *name, int namelen)  in find_entry()  argument
107 	struct rb_node *node = dir->root.rb_node;  in find_entry()
207 static int insert_header(struct ctl_dir *dir, struct ctl_table_header *header)  in insert_header()  argument
213 	if (is_empty_dir(&dir->header))  in insert_header()
218 		if (!RB_EMPTY_ROOT(&dir->root))  in insert_header()
220 		set_empty_dir(dir);  in insert_header()
223 	dir->header.nreg++;  in insert_header()
224 	header->parent = dir;  in insert_header()
239 		clear_empty_dir(dir);  in insert_header()
241 	drop_sysctl_table(&dir->header);  in insert_header()
331 				      struct ctl_dir *dir,  in lookup_entry()  argument
338 	entry = find_entry(&head, dir, name, namelen);  in lookup_entry()
359 static void first_entry(struct ctl_dir *dir,  in first_entry()  argument
367 	ctl_node = first_usable_entry(rb_first(&dir->root));  in first_entry()
468 		head = &sysctl_table_root.default_set.dir.header;  in grab_header()
472 static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,  in proc_sys_lookup()  argument
475 	struct ctl_table_header *head = grab_header(dir);  in proc_sys_lookup()
501 	inode = proc_sys_make_inode(dir->i_sb, h ? h : head, p);  in proc_sys_lookup()
618 	struct dentry *child, *dir = file->f_path.dentry;  in proc_sys_fill_cache()  local
628 	child = d_lookup(dir, &qname);  in proc_sys_fill_cache()
630 		child = d_alloc(dir, &qname);  in proc_sys_fill_cache()
632 			inode = proc_sys_make_inode(dir->d_sb, head, table);  in proc_sys_fill_cache()
862 static struct ctl_dir *find_subdir(struct ctl_dir *dir,  in find_subdir()  argument
868 	entry = find_entry(&head, dir, name, namelen);  in find_subdir()
897 	init_header(&new->header, set->dir.header.root, set, node, table);  in new_dir()
914 static struct ctl_dir *get_subdir(struct ctl_dir *dir,  in get_subdir()  argument
917 	struct ctl_table_set *set = dir->header.set;  in get_subdir()
922 	subdir = find_subdir(dir, name, namelen);  in get_subdir()
936 	subdir = find_subdir(dir, name, namelen);  in get_subdir()
943 	err = insert_header(dir, &new->header);  in get_subdir()
953 		sysctl_print_dir(dir);  in get_subdir()
957 	drop_sysctl_table(&dir->header);  in get_subdir()
964 static struct ctl_dir *xlate_dir(struct ctl_table_set *set, struct ctl_dir *dir)  in xlate_dir()  argument
968 	if (!dir->header.parent)  in xlate_dir()
969 		return &set->dir;  in xlate_dir()
970 	parent = xlate_dir(set, dir->header.parent);  in xlate_dir()
973 	procname = dir->header.ctl_table[0].procname;  in xlate_dir()
984 	struct ctl_dir *dir;  in sysctl_follow_link()  local
991 	dir = xlate_dir(set, (*phead)->parent);  in sysctl_follow_link()
992 	if (IS_ERR(dir))  in sysctl_follow_link()
993 		ret = PTR_ERR(dir);  in sysctl_follow_link()
997 		entry = find_entry(&head, dir, procname, strlen(procname));  in sysctl_follow_link()
1057 static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table *table,  in new_links()  argument
1094 	init_header(links, dir->header.root, dir->header.set, node, link_table);  in new_links()
1100 static bool get_links(struct ctl_dir *dir,  in get_links()  argument
1109 		link = find_entry(&head, dir, procname, strlen(procname));  in get_links()
1122 		link = find_entry(&head, dir, procname, strlen(procname));  in get_links()
1215 	struct ctl_table_root *root = set->dir.header.root;  in __register_sysctl_table()
1218 	struct ctl_dir *dir;  in __register_sysctl_table()  local
1237 	dir = &set->dir;  in __register_sysctl_table()
1239 	dir->header.nreg++;  in __register_sysctl_table()
1255 		dir = get_subdir(dir, name, namelen);  in __register_sysctl_table()
1256 		if (IS_ERR(dir))  in __register_sysctl_table()
1261 	if (insert_header(dir, header))  in __register_sysctl_table()
1264 	drop_sysctl_table(&dir->header);  in __register_sysctl_table()
1270 	drop_sysctl_table(&dir->header);  in __register_sysctl_table()
1601 	init_header(&set->dir.header, root, set, NULL, root_table);  in setup_sysctl_set()
1606 	WARN_ON(!RB_EMPTY_ROOT(&set->dir.root));  in retire_sysctl_set()