diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /include/linux/pid_namespace.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/linux/pid_namespace.h')
-rw-r--r-- | include/linux/pid_namespace.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h new file mode 100644 index 000000000..f9f9931e0 --- /dev/null +++ b/include/linux/pid_namespace.h @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_PID_NS_H +#define _LINUX_PID_NS_H + +#include <linux/sched.h> +#include <linux/bug.h> +#include <linux/mm.h> +#include <linux/workqueue.h> +#include <linux/threads.h> +#include <linux/nsproxy.h> +#include <linux/ns_common.h> +#include <linux/idr.h> + +/* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */ +#define MAX_PID_NS_LEVEL 32 + +struct fs_pin; + +#if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) +/* modes for vm.memfd_noexec sysctl */ +#define MEMFD_NOEXEC_SCOPE_EXEC 0 /* MFD_EXEC implied if unset */ +#define MEMFD_NOEXEC_SCOPE_NOEXEC_SEAL 1 /* MFD_NOEXEC_SEAL implied if unset */ +#define MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED 2 /* same as 1, except MFD_EXEC rejected */ +#endif + +struct pid_namespace { + struct idr idr; + struct rcu_head rcu; + unsigned int pid_allocated; + struct task_struct *child_reaper; + struct kmem_cache *pid_cachep; + unsigned int level; + struct pid_namespace *parent; +#ifdef CONFIG_BSD_PROCESS_ACCT + struct fs_pin *bacct; +#endif + struct user_namespace *user_ns; + struct ucounts *ucounts; + int reboot; /* group exit code if this pidns was rebooted */ + struct ns_common ns; +#if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) + int memfd_noexec_scope; +#endif +} __randomize_layout; + +extern struct pid_namespace init_pid_ns; + +#define PIDNS_ADDING (1U << 31) + +#ifdef CONFIG_PID_NS +static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) +{ + if (ns != &init_pid_ns) + refcount_inc(&ns->ns.count); + return ns; +} + +#if defined(CONFIG_SYSCTL) && defined(CONFIG_MEMFD_CREATE) +static inline int pidns_memfd_noexec_scope(struct pid_namespace *ns) +{ + int scope = MEMFD_NOEXEC_SCOPE_EXEC; + + for (; ns; ns = ns->parent) + scope = max(scope, READ_ONCE(ns->memfd_noexec_scope)); + + return scope; +} +#else +static inline int pidns_memfd_noexec_scope(struct pid_namespace *ns) +{ + return 0; +} +#endif + +extern struct pid_namespace *copy_pid_ns(unsigned long flags, + struct user_namespace *user_ns, struct pid_namespace *ns); +extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); +extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); +extern void put_pid_ns(struct pid_namespace *ns); + +#else /* !CONFIG_PID_NS */ +#include <linux/err.h> + +static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) +{ + return ns; +} + +static inline int pidns_memfd_noexec_scope(struct pid_namespace *ns) +{ + return 0; +} + +static inline struct pid_namespace *copy_pid_ns(unsigned long flags, + struct user_namespace *user_ns, struct pid_namespace *ns) +{ + if (flags & CLONE_NEWPID) + ns = ERR_PTR(-EINVAL); + return ns; +} + +static inline void put_pid_ns(struct pid_namespace *ns) +{ +} + +static inline void zap_pid_ns_processes(struct pid_namespace *ns) +{ + BUG(); +} + +static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) +{ + return 0; +} +#endif /* CONFIG_PID_NS */ + +extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); +void pidhash_init(void); +void pid_idr_init(void); + +static inline bool task_is_in_init_pid_ns(struct task_struct *tsk) +{ + return task_active_pid_ns(tsk) == &init_pid_ns; +} + +#endif /* _LINUX_PID_NS_H */ |