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[PATCH] beginning of sysctl cleanup - ctl_table_set

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New object: set of sysctls [currently - root and per-net-ns].
Contains: pointer to parent set, list of tables and "should I see this set?"
method (->is_seen(set)).
Current lists of tables are subsumed by that; net-ns contains such a beast.
->lookup() for ctl_table_root returns pointer to ctl_table_set instead of
that to ->list of that ctl_table_set.

[folded compile fixes by rdd for configs without sysctl]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2008-07-14 21:22:20 -04:00
parent 7ac6cd653d
commit 734550921e
4 changed files with 57 additions and 25 deletions
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15
include/linux/sysctl.h
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@ -947,6 +947,16 @@ struct ctl_table;
struct nsproxy;
struct ctl_table_root;
struct ctl_table_set {
struct list_head list;
struct ctl_table_set *parent;
int (*is_seen)(struct ctl_table_set *);
};
extern void setup_sysctl_set(struct ctl_table_set *p,
struct ctl_table_set *parent,
int (*is_seen)(struct ctl_table_set *));
extern struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev);
extern struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
struct ctl_table_header *prev);
@ -1049,8 +1059,8 @@ struct ctl_table
struct ctl_table_root {
struct list_head root_list;
struct list_head header_list;
struct list_head *(*lookup)(struct ctl_table_root *root,
struct ctl_table_set default_set;
struct ctl_table_set *(*lookup)(struct ctl_table_root *root,
struct nsproxy *namespaces);
int (*permissions)(struct ctl_table_root *root,
struct nsproxy *namespaces, struct ctl_table *table);
@ -1066,6 +1076,7 @@ struct ctl_table_header
struct completion *unregistering;
struct ctl_table *ctl_table_arg;
struct ctl_table_root *root;
struct ctl_table_set *set;
};
/* struct ctl_path describes where in the hierarchy a table is added */