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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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22
net/sysctl_net.c
View file

@ -29,10 +29,15 @@
#include <linux/if_tr.h>
#endif
static struct list_head *
static struct ctl_table_set *
net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
{
return &namespaces->net_ns->sysctl_table_headers;
return &namespaces->net_ns->sysctls;
}
static int is_seen(struct ctl_table_set *set)
{
return &current->nsproxy->net_ns->sysctls == set;
}
/* Return standard mode bits for table entry. */
@ -53,13 +58,6 @@ static struct ctl_table_root net_sysctl_root = {
.permissions = net_ctl_permissions,
};
static LIST_HEAD(net_sysctl_ro_tables);
static struct list_head *net_ctl_ro_header_lookup(struct ctl_table_root *root,
struct nsproxy *namespaces)
{
return &net_sysctl_ro_tables;
}
static int net_ctl_ro_header_perms(struct ctl_table_root *root,
struct nsproxy *namespaces, struct ctl_table *table)
{
@ -70,19 +68,18 @@ static int net_ctl_ro_header_perms(struct ctl_table_root *root,
}
static struct ctl_table_root net_sysctl_ro_root = {
.lookup = net_ctl_ro_header_lookup,
.permissions = net_ctl_ro_header_perms,
};
static int sysctl_net_init(struct net *net)
{
INIT_LIST_HEAD(&net->sysctl_table_headers);
setup_sysctl_set(&net->sysctls, NULL, is_seen);
return 0;
}
static void sysctl_net_exit(struct net *net)
{
WARN_ON(!list_empty(&net->sysctl_table_headers));
WARN_ON(!list_empty(&net->sysctls.list));
return;
}
@ -98,6 +95,7 @@ static __init int sysctl_init(void)
if (ret)
goto out;
register_sysctl_root(&net_sysctl_root);
setup_sysctl_set(&net_sysctl_ro_root.default_set, NULL, NULL);
register_sysctl_root(&net_sysctl_ro_root);
out:
return ret;