cgroup: drop cgroup_canonical_path

src/lxc/cgroups/cgfs.c

@@ -2363,28 +2363,6 @@ static const char *cgfs_get_cgroup(void *hdata, const char *subsystem)
 	return lxc_cgroup_get_hierarchy_path_data(subsystem, d);
 }
 
-static const char *cgfs_canonical_path(void *hdata)
-{
-	struct cgfs_data *d = hdata;
-	struct cgroup_process_info *info_ptr;
-	char *path = NULL;
-
-	if (!d)
-		return NULL;
-
-	for (info_ptr = d->info; info_ptr; info_ptr = info_ptr->next) {
-		if (!path)
-			path = info_ptr->cgroup_path;
-		else if (strcmp(path, info_ptr->cgroup_path) != 0) {
-			ERROR("not all paths match %s, %s has path %s", path,
-				info_ptr->hierarchy->subsystems[0], info_ptr->cgroup_path);
-			return NULL;
-		}
-	}
-
-	return path;
-}
-
 static bool cgfs_escape(void *hdata)
 {
 	struct cgroup_meta_data *md;
@@ -2637,7 +2615,6 @@ static struct cgroup_ops cgfs_ops = {
 	.enter = cgfs_enter,
 	.create_legacy = cgfs_create_legacy,
 	.get_cgroup = cgfs_get_cgroup,
-	.canonical_path = cgfs_canonical_path,
 	.escape = cgfs_escape,
 	.num_hierarchies = cgfs_num_hierarchies,
 	.get_hierarchies = cgfs_get_hierarchies,

src/lxc/cgroups/cgfsng.c

@@ -1087,13 +1087,6 @@ out_free:
 	return false;
 }
 
-static const char *cgfsng_canonical_path(void *hdata)
-{
-	struct cgfsng_handler_data *d = hdata;
-
-	return d->container_cgroup;
-}
-
 static bool cgfsng_enter(void *hdata, pid_t pid)
 {
 	char pidstr[25];
@@ -1686,7 +1679,6 @@ static struct cgroup_ops cgfsng_ops = {
 	.destroy = cgfsng_destroy,
 	.create = cgfsng_create,
 	.enter = cgfsng_enter,
-	.canonical_path = cgfsng_canonical_path,
 	.escape = cgfsng_escape,
 	.num_hierarchies = cgfsng_num_hierarchies,
 	.get_hierarchies = cgfsng_get_hierarchies,

src/lxc/cgroups/cgmanager.c

@@ -746,15 +746,6 @@ static const char *cgm_get_cgroup(void *hdata, const char *subsystem)
 	return d->cgroup_path;
 }
 
-static const char *cgm_canonical_path(void *hdata)
-{
-	struct cgm_data *d = hdata;
-
-	if (!d || !d->cgroup_path)
-		return NULL;
-	return d->cgroup_path;
-}
-
 #if HAVE_CGMANAGER_GET_PID_CGROUP_ABS_SYNC
 static inline bool abs_cgroup_supported(void) {
 	return api_version >= CGM_SUPPORTS_GET_ABS;
@@ -1667,7 +1658,6 @@ static struct cgroup_ops cgmanager_ops = {
 	.enter = cgm_enter,
 	.create_legacy = NULL,
 	.get_cgroup = cgm_get_cgroup,
-	.canonical_path = cgm_canonical_path,
 	.escape = cgm_escape,
 	.num_hierarchies = cgm_num_hierarchies,
 	.get_hierarchies = cgm_get_hierarchies,

src/lxc/cgroups/cgroup.c

@@ -119,19 +119,6 @@ bool cgroup_escape(struct lxc_handler *handler)
 	return false;
 }
 
-const char *cgroup_canonical_path(struct lxc_handler *handler)
-{
-	if (geteuid()) {
-		WARN("cgroup_canonical_path only makes sense for privileged containers.\n");
-		return NULL;
-	}
-
-	if (ops)
-		return ops->canonical_path(handler->cgroup_data);
-
-	return NULL;
-}
-
 int cgroup_num_hierarchies(void)
 {
 	if (!ops)

src/lxc/cgroups/cgroup.h

@@ -47,7 +47,6 @@ struct cgroup_ops {
 	bool (*enter)(void *hdata, pid_t pid);
 	bool (*create_legacy)(void *hdata, pid_t pid);
 	const char *(*get_cgroup)(void *hdata, const char *subsystem);
-	const char *(*canonical_path)(void *hdata);
 	bool (*escape)();
 	int (*num_hierarchies)();
 	bool (*get_hierarchies)(int n, char ***out);
@@ -78,11 +77,6 @@ extern const char *cgroup_get_cgroup(struct lxc_handler *handler, const char *su
 extern bool cgroup_escape();
 extern int cgroup_num_hierarchies();
 extern bool cgroup_get_hierarchies(int i, char ***out);
-
-/*
- * Currently, this call  only makes sense for privileged containers.
- */
-extern const char *cgroup_canonical_path(struct lxc_handler *handler);
 extern bool cgroup_unfreeze(struct lxc_handler *handler);
 extern void cgroup_disconnect(void);
 extern cgroup_driver_t cgroup_driver(void);