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Commit bd295b56 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

sysctl: Remove the unnecessary sysctl_set parent concept. 



In sysctl_net register the two networking roots in the proper order.

In register_sysctl walk the sysctl sets in the reverse order of the
sysctl roots.

Remove parent from ctl_table_set and setup_sysctl_set as it is no
longer needed.

Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 97324cd8

fs/proc/proc_sysctl.c

+8 −3
Original line number Diff line number Diff line
@@ -995,13 +995,20 @@ struct ctl_table_header *__register_sysctl_paths( 
	header->attached_by = header->ctl_table;

	header->attached_to = root_table;

	header->parent = &root_table_header;

	for (set = header->set; set; set = set->parent) {

	set = header->set;

	root = header->root;

	for (;;) {

		struct ctl_table_header *p;

		list_for_each_entry(p, &set->list, ctl_entry) {

			if (p->unregistering)

				continue;

			try_attach(p, header);

		}

		if (root == &sysctl_table_root)

			break;

		root = list_entry(root->root_list.prev,

				  struct ctl_table_root, root_list);

		set = lookup_header_set(root, namespaces);

	}

	header->parent->count++;

	list_add_tail(&header->ctl_entry, &header->set->list);
@@ -1072,11 +1079,9 @@ void unregister_sysctl_table(struct ctl_table_header * header) 
EXPORT_SYMBOL(unregister_sysctl_table);



void setup_sysctl_set(struct ctl_table_set *p,

	struct ctl_table_set *parent,

	int (*is_seen)(struct ctl_table_set *))

{

	INIT_LIST_HEAD(&p->list);

	p->parent = parent ? parent : &sysctl_table_root.default_set;

	p->is_seen = is_seen;

}

include/linux/sysctl.h

+0 −3
Original line number Diff line number Diff line
@@ -1047,7 +1047,6 @@ struct ctl_table_header 


struct ctl_table_set {

	struct list_head list;

	struct ctl_table_set *parent;

	int (*is_seen)(struct ctl_table_set *);

};
@@ -1070,7 +1069,6 @@ struct ctl_path { 
void proc_sys_poll_notify(struct ctl_table_poll *poll);



extern void setup_sysctl_set(struct ctl_table_set *p,

	struct ctl_table_set *parent,

	int (*is_seen)(struct ctl_table_set *));

extern void retire_sysctl_set(struct ctl_table_set *set);
@@ -1102,7 +1100,6 @@ static inline void unregister_sysctl_table(struct ctl_table_header * table) 
}



static inline void setup_sysctl_set(struct ctl_table_set *p,

	struct ctl_table_set *parent,

	int (*is_seen)(struct ctl_table_set *))

{

}

net/sysctl_net.c

+2 −3
Original line number Diff line number Diff line
@@ -75,7 +75,6 @@ static struct ctl_table_root net_sysctl_ro_root = { 
static int __net_init sysctl_net_init(struct net *net)

{

	setup_sysctl_set(&net->sysctls,

			 &net_sysctl_ro_root.default_set,

			 is_seen);

	return 0;

}
@@ -96,9 +95,9 @@ static __init int net_sysctl_init(void) 
	ret = register_pernet_subsys(&sysctl_pernet_ops);

	if (ret)

		goto out;

	register_sysctl_root(&net_sysctl_root);

	setup_sysctl_set(&net_sysctl_ro_root.default_set, NULL, NULL);

	setup_sysctl_set(&net_sysctl_ro_root.default_set, NULL);

	register_sysctl_root(&net_sysctl_ro_root);

	register_sysctl_root(&net_sysctl_root);

out:

	return ret;

}