projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 61a58c6c SB |
1 | #ifndef _LINUX_PID_NS_H |
| 2 | #define _LINUX_PID_NS_H | |
| aa5a6662 SB |
3 | |
| 4 | #include <linux/sched.h> | |
| 187f1882 | 5 | #include <linux/bug.h> |
| aa5a6662 SB |
6 | #include <linux/mm.h> |
| 7 | #include <linux/threads.h> | |
| 9a575a92 CLG |
8 | #include <linux/nsproxy.h> |
| 9 | #include <linux/kref.h> | |
| aa5a6662 SB |
10 | |
| 11 | struct pidmap { | |
| 12 | atomic_t nr_free; | |
| 13 | void *page; | |
| 14 | }; | |
| 15 | ||
| 5cc54451 RC |
16 | #define BITS_PER_PAGE (PAGE_SIZE * 8) |
| 17 | #define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1) | |
| 18 | #define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE) | |
| aa5a6662 | 19 | |
| 20fad13a PE |
20 | struct bsd_acct_struct; |
| 21 | ||
| 61a58c6c | 22 | struct pid_namespace { |
| 9a575a92 CLG |
23 | struct kref kref; |
| 24 | struct pidmap pidmap[PIDMAP_ENTRIES]; | |
| 25 | int last_pid; | |
| c876ad76 | 26 | unsigned int nr_hashed; |
| 84d73786 | 27 | struct task_struct *child_reaper; |
| baf8f0f8 | 28 | struct kmem_cache *pid_cachep; |
| caafa432 | 29 | unsigned int level; |
| faacbfd3 | 30 | struct pid_namespace *parent; |
| 07543f5c PE |
31 | #ifdef CONFIG_PROC_FS |
| 32 | struct vfsmount *proc_mnt; | |
| 021ada7d | 33 | struct dentry *proc_self; |
| 07543f5c | 34 | #endif |
| 20fad13a PE |
35 | #ifdef CONFIG_BSD_PROCESS_ACCT |
| 36 | struct bsd_acct_struct *bacct; | |
| 37 | #endif | |
| 49f4d8b9 | 38 | struct user_namespace *user_ns; |
| 0a01f2cc | 39 | struct work_struct proc_work; |
| dcb0f222 | 40 | kgid_t pid_gid; |
| 0499680a | 41 | int hide_pid; |
| cf3f8921 | 42 | int reboot; /* group exit code if this pidns was rebooted */ |
| 98f842e6 | 43 | unsigned int proc_inum; |
| 3fbc9648 SB |
44 | }; |
| 45 | ||
| 61a58c6c | 46 | extern struct pid_namespace init_pid_ns; |
| 3fbc9648 | 47 | |
| c876ad76 EB |
48 | #define PIDNS_HASH_ADDING (1U << 31) |
| 49 | ||
| 57d5f66b | 50 | #ifdef CONFIG_PID_NS |
| a05f7b15 | 51 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
| 9a575a92 | 52 | { |
| b461cc03 PE |
53 | if (ns != &init_pid_ns) |
| 54 | kref_get(&ns->kref); | |
| a05f7b15 | 55 | return ns; |
| 9a575a92 CLG |
56 | } |
| 57 | ||
| 49f4d8b9 EB |
58 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, |
| 59 | struct user_namespace *user_ns, struct pid_namespace *ns); | |
| 74bd59bb | 60 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
| cf3f8921 | 61 | extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); |
| bbc2e3ef | 62 | extern void put_pid_ns(struct pid_namespace *ns); |
| 9a575a92 | 63 | |
| 57d5f66b EB |
64 | #else /* !CONFIG_PID_NS */ |
| 65 | #include <linux/err.h> | |
| 66 | ||
| 67 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
| 68 | { | |
| 69 | return ns; | |
| 70 | } | |
| 71 | ||
| 49f4d8b9 EB |
72 | static inline struct pid_namespace *copy_pid_ns(unsigned long flags, |
| 73 | struct user_namespace *user_ns, struct pid_namespace *ns) | |
| 57d5f66b EB |
74 | { |
| 75 | if (flags & CLONE_NEWPID) | |
| 76 | ns = ERR_PTR(-EINVAL); | |
| 77 | return ns; | |
| 78 | } | |
| 79 | ||
| 80 | static inline void put_pid_ns(struct pid_namespace *ns) | |
| 81 | { | |
| 82 | } | |
| 83 | ||
| 74bd59bb PE |
84 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) |
| 85 | { | |
| 86 | BUG(); | |
| 87 | } | |
| cf3f8921 DL |
88 | |
| 89 | static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) | |
| 90 | { | |
| 91 | return 0; | |
| 92 | } | |
| 57d5f66b EB |
93 | #endif /* CONFIG_PID_NS */ |
| 94 | ||
| 61bce0f1 | 95 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
| 3ae4eed3 AB |
96 | void pidhash_init(void); |
| 97 | void pidmap_init(void); | |
| 98 | ||
| 61a58c6c | 99 | #endif /* _LINUX_PID_NS_H */ |