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cgroup: split namespace into separate header

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We have dedicated headers for all namespace types. Add one for the
cgroup namespace as well. Now it's consistent for all namespace types
and easy to figure out what to include.

Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-09-17 12:28:03 +02:00
parent f74ca6da11
commit 5fc6bef178
2 changed files with 57 additions and 50 deletions
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51
include/linux/cgroup.h
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@@ -27,6 +27,7 @@
#include <linux/kernel_stat.h>
#include <linux/cgroup-defs.h>
#include <linux/cgroup_namespace.h>
struct kernel_clone_args;
@@ -783,56 +784,6 @@ static inline void cgroup_sk_free(struct sock_cgroup_data *skcd) {}
#endif /* CONFIG_CGROUP_DATA */
struct cgroup_namespace {
struct ns_common ns;
struct user_namespace *user_ns;
struct ucounts *ucounts;
struct css_set *root_cset;
};
extern struct cgroup_namespace init_cgroup_ns;
#ifdef CONFIG_CGROUPS
static inline struct cgroup_namespace *to_cg_ns(struct ns_common *ns)
{
return container_of(ns, struct cgroup_namespace, ns);
}
void free_cgroup_ns(struct cgroup_namespace *ns);
struct cgroup_namespace *copy_cgroup_ns(unsigned long flags,
struct user_namespace *user_ns,
struct cgroup_namespace *old_ns);
int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen,
struct cgroup_namespace *ns);
static inline void get_cgroup_ns(struct cgroup_namespace *ns)
{
refcount_inc(&ns->ns.count);
}
static inline void put_cgroup_ns(struct cgroup_namespace *ns)
{
if (refcount_dec_and_test(&ns->ns.count))
free_cgroup_ns(ns);
}
#else /* !CONFIG_CGROUPS */
static inline void free_cgroup_ns(struct cgroup_namespace *ns) { }
static inline struct cgroup_namespace *
copy_cgroup_ns(unsigned long flags, struct user_namespace *user_ns,
struct cgroup_namespace *old_ns)
{
return old_ns;
}
static inline void get_cgroup_ns(struct cgroup_namespace *ns) { }
static inline void put_cgroup_ns(struct cgroup_namespace *ns) { }
#endif /* !CONFIG_CGROUPS */
#ifdef CONFIG_CGROUPS