Revert "cgroupfs: support older kernels without cgroup.clone_children"

This reverts commit 0a4d93787d4be78dc5e2873cf7c605c01d383792.

diff --git a/src/lxc/cgroup.c b/src/lxc/cgroup.c
index 49f1ba1f8f43ee9dfd8639a97154ccbd4090d03b..4482b326be6ae02970a9580c3d3acd33482638f1 100644 (file)
--- a/src/lxc/cgroup.c
+++ b/src/lxc/cgroup.c
@@ -74,7 +74,6 @@ static int do_setup_cgroup_limits(struct lxc_handler *h, struct lxc_list *cgroup
 static int cgroup_recursive_task_count(const char *cgroup_path);
 static int count_lines(const char *fn);
 static int handle_cgroup_settings(struct cgroup_mount_point *mp, char *cgroup_path);
-static void setup_cpuset_if_needed(char **subsystems, char *path);
 
 static struct cgroup_ops cgfs_ops;
 struct cgroup_ops *active_cg_ops = &cgfs_ops;
@@ -724,71 +723,6 @@ static char *cgroup_rename_nsgroup(const char *mountpath, const char *oldname, p
        return newname;
 }
 
-static long get_value(const char *dir, const char *file)
-{
-       FILE *f;
-       char path[MAXPATHLEN];
-       int ret, retv;
-
-       retv = snprintf(path, MAXPATHLEN, "%s/%s", dir, file);
-       if (retv < 0 || retv >= MAXPATHLEN)
-               return 0;
-       f = fopen(path, "r");
-       ret = fscanf(f, "%d", &retv);
-       fclose(f);
-       if (ret != 1)
-               return 0;
-       return retv;
-}
-
-static void set_value(const char *dir, const char *file, long v)
-{
-       FILE *f;
-       char path[MAXPATHLEN];
-       int retv;
-
-       retv = snprintf(path, MAXPATHLEN, "%s/%s", dir, file);
-       if (retv < 0 || retv >= MAXPATHLEN)
-               return;
-       f = fopen(path, "w");
-       fprintf(f, "%ld\n", v);
-       fclose(f);
-}
-
-static bool file_exists(const char *dir, const char *file)
-{
-       char path[MAXPATHLEN];
-       struct stat sb;
-       int ret;
-
-       ret = snprintf(path, MAXPATHLEN, "%s/%s", dir, file);
-       if (ret < 0 || ret >= MAXPATHLEN)
-               return true;
-       ret = stat(path, &sb);
-       return ret == 0;
-}
-
-static void setup_cpuset_if_needed(char **subsystems, char *path)
-{
-       char *parentpath, *p;
-       long v;
-       
-       if (!lxc_string_in_array("cpuset", (const char **) subsystems))
-               return;
-       if (file_exists(path, "cgroup.clone_children"))
-               return;
-       parentpath = strdup(path);
-       if (!parentpath)
-               return;
-       if ((p = rindex(parentpath, '/')))
-               *p = '\0';
-       v = get_value(parentpath, "cpuset.mems");
-       set_value(path, "cpuset.mems", v);
-       v = get_value(parentpath, "cpuset.cpus");
-       set_value(path, "cpuset.cpus", v);
-       free(parentpath);
-}
-
 /* create a new cgroup */
 struct cgroup_process_info *lxc_cgroupfs_create(const char *name, const char *path_pattern, struct cgroup_meta_data *meta_data, const char *sub_pattern)
 {
@@ -964,8 +898,6 @@ struct cgroup_process_info *lxc_cgroupfs_create(const char *name, const char *pa
                                if (r < 0)
                                        goto cleanup_from_error;
                                info_ptr->created_paths[info_ptr->created_paths_count++] = current_entire_path;
-                               setup_cpuset_if_needed(info_ptr->hierarchy->subsystems,
-                                               current_entire_path);
                        } else {
                                /* if we didn't create the cgroup, then we have to make sure that
                                 * further cgroups will be created properly
@@ -2107,12 +2039,8 @@ static int handle_cgroup_settings(struct cgroup_mount_point *mp,
         */
        if (lxc_string_in_array("cpuset", (const char **)mp->hierarchy->subsystems)) {
                char *cc_path = cgroup_to_absolute_path(mp, cgroup_path, "/cgroup.clone_children");
-               struct stat sb;
-
                if (!cc_path)
                        return -1;
-               if (stat(cc_path, &sb) != 0 && errno == ENOENT)
-                       return 0;
                r = lxc_read_from_file(cc_path, buf, 1);
                if (r == 1 && buf[0] == '1') {
                        free(cc_path);