| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * procfs namespace bits |
| */ |
| #ifndef _LINUX_PROC_NS_H |
| #define _LINUX_PROC_NS_H |
| |
| #include <linux/ns_common.h> |
| |
| struct pid_namespace; |
| struct nsset; |
| struct path; |
| struct task_struct; |
| struct inode; |
| |
| struct proc_ns_operations { |
| const char *name; |
| const char *real_ns_name; |
| int type; |
| struct ns_common *(*get)(struct task_struct *task); |
| void (*put)(struct ns_common *ns); |
| int (*install)(struct nsset *nsset, struct ns_common *ns); |
| struct user_namespace *(*owner)(struct ns_common *ns); |
| struct ns_common *(*get_parent)(struct ns_common *ns); |
| } __randomize_layout; |
| |
| extern const struct proc_ns_operations netns_operations; |
| extern const struct proc_ns_operations utsns_operations; |
| extern const struct proc_ns_operations ipcns_operations; |
| extern const struct proc_ns_operations pidns_operations; |
| extern const struct proc_ns_operations pidns_for_children_operations; |
| extern const struct proc_ns_operations userns_operations; |
| extern const struct proc_ns_operations mntns_operations; |
| extern const struct proc_ns_operations cgroupns_operations; |
| extern const struct proc_ns_operations timens_operations; |
| extern const struct proc_ns_operations timens_for_children_operations; |
| |
| /* |
| * We always define these enumerators |
| */ |
| enum { |
| PROC_ROOT_INO = 1, |
| PROC_IPC_INIT_INO = 0xEFFFFFFFU, |
| PROC_UTS_INIT_INO = 0xEFFFFFFEU, |
| PROC_USER_INIT_INO = 0xEFFFFFFDU, |
| PROC_PID_INIT_INO = 0xEFFFFFFCU, |
| PROC_CGROUP_INIT_INO = 0xEFFFFFFBU, |
| PROC_TIME_INIT_INO = 0xEFFFFFFAU, |
| }; |
| |
| #ifdef CONFIG_PROC_FS |
| |
| extern int proc_alloc_inum(unsigned int *pino); |
| extern void proc_free_inum(unsigned int inum); |
| |
| #else /* CONFIG_PROC_FS */ |
| |
| static inline int proc_alloc_inum(unsigned int *inum) |
| { |
| *inum = 1; |
| return 0; |
| } |
| static inline void proc_free_inum(unsigned int inum) {} |
| |
| #endif /* CONFIG_PROC_FS */ |
| |
| static inline int ns_alloc_inum(struct ns_common *ns) |
| { |
| atomic_long_set(&ns->stashed, 0); |
| return proc_alloc_inum(&ns->inum); |
| } |
| |
| #define ns_free_inum(ns) proc_free_inum((ns)->inum) |
| |
| extern struct file *proc_ns_fget(int fd); |
| #define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private) |
| extern int ns_get_path(struct path *path, struct task_struct *task, |
| const struct proc_ns_operations *ns_ops); |
| typedef struct ns_common *ns_get_path_helper_t(void *); |
| extern int ns_get_path_cb(struct path *path, ns_get_path_helper_t ns_get_cb, |
| void *private_data); |
| |
| extern bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino); |
| |
| extern int ns_get_name(char *buf, size_t size, struct task_struct *task, |
| const struct proc_ns_operations *ns_ops); |
| extern void nsfs_init(void); |
| |
| #endif /* _LINUX_PROC_NS_H */ |