projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 61a58c6c SB |
2 | #ifndef _LINUX_PID_NS_H |
| 3 | #define _LINUX_PID_NS_H | |
| aa5a6662 SB |
4 | |
| 5 | #include <linux/sched.h> | |
| 187f1882 | 6 | #include <linux/bug.h> |
| aa5a6662 | 7 | #include <linux/mm.h> |
| a27bb332 | 8 | #include <linux/workqueue.h> |
| aa5a6662 | 9 | #include <linux/threads.h> |
| 9a575a92 | 10 | #include <linux/nsproxy.h> |
| 435d5f4b | 11 | #include <linux/ns_common.h> |
| 95846ecf | 12 | #include <linux/idr.h> |
| aa5a6662 | 13 | |
| 49cb2fc4 AR |
14 | /* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */ |
| 15 | #define MAX_PID_NS_LEVEL 32 | |
| aa5a6662 | 16 | |
| 59eda0e0 | 17 | struct fs_pin; |
| 20fad13a | 18 | |
| 61a58c6c | 19 | struct pid_namespace { |
| 95846ecf | 20 | struct idr idr; |
| 1adfcb03 | 21 | struct rcu_head rcu; |
| e8cfbc24 | 22 | unsigned int pid_allocated; |
| 84d73786 | 23 | struct task_struct *child_reaper; |
| baf8f0f8 | 24 | struct kmem_cache *pid_cachep; |
| caafa432 | 25 | unsigned int level; |
| faacbfd3 | 26 | struct pid_namespace *parent; |
| 20fad13a | 27 | #ifdef CONFIG_BSD_PROCESS_ACCT |
| 59eda0e0 | 28 | struct fs_pin *bacct; |
| 20fad13a | 29 | #endif |
| 49f4d8b9 | 30 | struct user_namespace *user_ns; |
| f333c700 | 31 | struct ucounts *ucounts; |
| cf3f8921 | 32 | int reboot; /* group exit code if this pidns was rebooted */ |
| 435d5f4b | 33 | struct ns_common ns; |
| 3859a271 | 34 | } __randomize_layout; |
| 3fbc9648 | 35 | |
| 61a58c6c | 36 | extern struct pid_namespace init_pid_ns; |
| 3fbc9648 | 37 | |
| e8cfbc24 | 38 | #define PIDNS_ADDING (1U << 31) |
| c876ad76 | 39 | |
| 57d5f66b | 40 | #ifdef CONFIG_PID_NS |
| a05f7b15 | 41 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
| 9a575a92 | 42 | { |
| b461cc03 | 43 | if (ns != &init_pid_ns) |
| 8eb71d95 | 44 | refcount_inc(&ns->ns.count); |
| a05f7b15 | 45 | return ns; |
| 9a575a92 CLG |
46 | } |
| 47 | ||
| 49f4d8b9 EB |
48 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, |
| 49 | struct user_namespace *user_ns, struct pid_namespace *ns); | |
| 74bd59bb | 50 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
| cf3f8921 | 51 | extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); |
| bbc2e3ef | 52 | extern void put_pid_ns(struct pid_namespace *ns); |
| 9a575a92 | 53 | |
| 57d5f66b EB |
54 | #else /* !CONFIG_PID_NS */ |
| 55 | #include <linux/err.h> | |
| 56 | ||
| 57 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
| 58 | { | |
| 59 | return ns; | |
| 60 | } | |
| 61 | ||
| 49f4d8b9 EB |
62 | static inline struct pid_namespace *copy_pid_ns(unsigned long flags, |
| 63 | struct user_namespace *user_ns, struct pid_namespace *ns) | |
| 57d5f66b EB |
64 | { |
| 65 | if (flags & CLONE_NEWPID) | |
| 66 | ns = ERR_PTR(-EINVAL); | |
| 67 | return ns; | |
| 68 | } | |
| 69 | ||
| 70 | static inline void put_pid_ns(struct pid_namespace *ns) | |
| 71 | { | |
| 72 | } | |
| 73 | ||
| 74bd59bb PE |
74 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) |
| 75 | { | |
| 76 | BUG(); | |
| 77 | } | |
| cf3f8921 DL |
78 | |
| 79 | static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) | |
| 80 | { | |
| 81 | return 0; | |
| 82 | } | |
| 57d5f66b EB |
83 | #endif /* CONFIG_PID_NS */ |
| 84 | ||
| 61bce0f1 | 85 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
| 3ae4eed3 | 86 | void pidhash_init(void); |
| 95846ecf | 87 | void pid_idr_init(void); |
| 3ae4eed3 | 88 | |
| 61a58c6c | 89 | #endif /* _LINUX_PID_NS_H */ |