sysctl: Add support for register sysctl tables with a normal cstring path.

Make __register_sysctl_table the core sysctl registration operation and
make it take a char * string as path.

Now that binary paths have been banished into the real of backwards
compatibility in kernel/binary_sysctl.c where they can be safely
ignored there is no longer a need to use struct ctl_path to represent
path names when registering ctl_tables.

Start the transition to using normal char * strings to represent
pathnames when registering sysctl tables.  Normal strings are easier
to deal with both in the internal sysctl implementation and for
programmers registering sysctl tables.

__register_sysctl_paths is turned into a backwards compatibility wrapper
that converts a ctl_path array into a normal char * string.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 43c36acdb628..a514e0f6056d 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -1073,6 +1073,9 @@ extern void setup_sysctl_set(struct ctl_table_set *p,
 extern void retire_sysctl_set(struct ctl_table_set *set);
 
 void register_sysctl_root(struct ctl_table_root *root);
+struct ctl_table_header *__register_sysctl_table(
+        struct ctl_table_root *root, struct nsproxy *namespaces,
+        const char *path, struct ctl_table *table);
 struct ctl_table_header *__register_sysctl_paths(
         struct ctl_table_root *root, struct nsproxy *namespaces,
         const struct ctl_path *path, struct ctl_table *table);