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authorAl Viro <viro@zeniv.linux.org.uk>2008-07-14 21:22:20 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2008-07-26 20:53:08 -0400
commit734550921e9b7ab924a43aa3d0bd4239dac4fbf1 (patch)
tree7be4b0808ba9860f1d953b45120262a277866021 /kernel
parent7ac6cd653d7c31ad6b7bb5b88c549c4ebf628c34 (diff)
[PATCH] beginning of sysctl cleanup - ctl_table_set
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sysctl.c41
1 files changed, 31 insertions, 10 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 35a50db9b6c..8ee4a0619fb 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -160,12 +160,13 @@ static struct ctl_table root_table[];
static struct ctl_table_root sysctl_table_root;
static struct ctl_table_header root_table_header = {
.ctl_table = root_table,
- .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.header_list),
+ .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),
.root = &sysctl_table_root,
+ .set = &sysctl_table_root.default_set,
};
static struct ctl_table_root sysctl_table_root = {
.root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
- .header_list = LIST_HEAD_INIT(root_table_header.ctl_entry),
+ .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),
};
static struct ctl_table kern_table[];
@@ -1403,14 +1404,20 @@ void sysctl_head_finish(struct ctl_table_header *head)
spin_unlock(&sysctl_lock);
}
+static struct ctl_table_set *
+lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces)
+{
+ struct ctl_table_set *set = &root->default_set;
+ if (root->lookup)
+ set = root->lookup(root, namespaces);
+ return set;
+}
+
static struct list_head *
lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
{
- struct list_head *header_list;
- header_list = &root->header_list;
- if (root->lookup)
- header_list = root->lookup(root, namespaces);
- return header_list;
+ struct ctl_table_set *set = lookup_header_set(root, namespaces);
+ return &set->list;
}
struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
@@ -1720,7 +1727,6 @@ struct ctl_table_header *__register_sysctl_paths(
struct nsproxy *namespaces,
const struct ctl_path *path, struct ctl_table *table)
{
- struct list_head *header_list;
struct ctl_table_header *header;
struct ctl_table *new, **prevp;
unsigned int n, npath;
@@ -1772,8 +1778,8 @@ struct ctl_table_header *__register_sysctl_paths(
}
#endif
spin_lock(&sysctl_lock);
- header_list = lookup_header_list(root, namespaces);
- list_add_tail(&header->ctl_entry, header_list);
+ header->set = lookup_header_set(root, namespaces);
+ list_add_tail(&header->ctl_entry, &header->set->list);
spin_unlock(&sysctl_lock);
return header;
@@ -1832,6 +1838,15 @@ void unregister_sysctl_table(struct ctl_table_header * header)
kfree(header);
}
+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;
+}
+
#else /* !CONFIG_SYSCTL */
struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
{
@@ -1848,6 +1863,12 @@ void unregister_sysctl_table(struct ctl_table_header * table)
{
}
+void setup_sysctl_set(struct ctl_table_set *p,
+ struct ctl_table_set *parent,
+ int (*is_seen)(struct ctl_table_set *))
+{
+}
+
#endif /* CONFIG_SYSCTL */
/*