1 /* Internal procfs definitions
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/proc_fs.h>
13 #include <linux/proc_ns.h>
14 #include <linux/spinlock.h>
15 #include <linux/atomic.h>
16 #include <linux/binfmts.h>
17 #include <linux/sched/coredump.h>
18 #include <linux/sched/task.h>
20 struct ctl_table_header
;
24 * This is not completely implemented yet. The idea is to
25 * create an in-memory tree (like the actual /proc filesystem
26 * tree) of these proc_dir_entries, so that we can dynamically
27 * add new files to /proc.
29 * parent/subdir are used for the directory structure (every /proc file has a
30 * parent, but "subdir" is empty for all non-directory entries).
31 * subdir_node is used to build the rb tree "subdir" of the parent.
33 struct proc_dir_entry
{
40 const struct inode_operations
*proc_iops
;
41 const struct file_operations
*proc_fops
;
42 struct proc_dir_entry
*parent
;
43 struct rb_root_cached subdir
;
44 struct rb_node subdir_node
;
46 atomic_t count
; /* use count */
47 atomic_t in_use
; /* number of callers into module in progress; */
48 /* negative -> it's going away RSN */
49 struct completion
*pde_unload_completion
;
50 struct list_head pde_openers
; /* who did ->open, but not ->release */
51 spinlock_t pde_unload_lock
; /* proc_fops checks and pde_users bumps */
57 int (*proc_get_link
)(struct dentry
*, struct path
*);
58 int (*proc_show
)(struct seq_file
*m
,
59 struct pid_namespace
*ns
, struct pid
*pid
,
60 struct task_struct
*task
);
67 struct proc_dir_entry
*pde
;
68 struct ctl_table_header
*sysctl
;
69 struct ctl_table
*sysctl_entry
;
70 struct hlist_node sysctl_inodes
;
71 const struct proc_ns_operations
*ns_ops
;
72 struct inode vfs_inode
;
78 static inline struct proc_inode
*PROC_I(const struct inode
*inode
)
80 return container_of(inode
, struct proc_inode
, vfs_inode
);
83 static inline struct proc_dir_entry
*PDE(const struct inode
*inode
)
85 return PROC_I(inode
)->pde
;
88 static inline void *__PDE_DATA(const struct inode
*inode
)
90 return PDE(inode
)->data
;
93 static inline struct pid
*proc_pid(struct inode
*inode
)
95 return PROC_I(inode
)->pid
;
98 static inline struct task_struct
*get_proc_task(struct inode
*inode
)
100 return get_pid_task(proc_pid(inode
), PIDTYPE_PID
);
103 void task_dump_owner(struct task_struct
*task
, umode_t mode
,
104 kuid_t
*ruid
, kgid_t
*rgid
);
106 unsigned name_to_int(const struct qstr
*qstr
);
108 * Offset of the first process in the /proc root directory..
110 #define FIRST_PROCESS_ENTRY 256
112 /* Worst case buffer size needed for holding an integer. */
113 #define PROC_NUMBUF 13
118 extern const struct file_operations proc_tid_children_operations
;
120 extern int proc_tid_stat(struct seq_file
*, struct pid_namespace
*,
121 struct pid
*, struct task_struct
*);
122 extern int proc_tgid_stat(struct seq_file
*, struct pid_namespace
*,
123 struct pid
*, struct task_struct
*);
124 extern int proc_pid_status(struct seq_file
*, struct pid_namespace
*,
125 struct pid
*, struct task_struct
*);
126 extern int proc_pid_statm(struct seq_file
*, struct pid_namespace
*,
127 struct pid
*, struct task_struct
*);
132 extern const struct dentry_operations pid_dentry_operations
;
133 extern int pid_getattr(const struct path
*, struct kstat
*, u32
, unsigned int);
134 extern int proc_setattr(struct dentry
*, struct iattr
*);
135 extern struct inode
*proc_pid_make_inode(struct super_block
*, struct task_struct
*, umode_t
);
136 extern int pid_revalidate(struct dentry
*, unsigned int);
137 extern int pid_delete_dentry(const struct dentry
*);
138 extern int proc_pid_readdir(struct file
*, struct dir_context
*);
139 extern struct dentry
*proc_pid_lookup(struct inode
*, struct dentry
*, unsigned int);
140 extern loff_t
mem_lseek(struct file
*, loff_t
, int);
143 typedef int instantiate_t(struct inode
*, struct dentry
*,
144 struct task_struct
*, const void *);
145 extern bool proc_fill_cache(struct file
*, struct dir_context
*, const char *, int,
146 instantiate_t
, struct task_struct
*, const void *);
151 extern struct dentry
*proc_lookup(struct inode
*, struct dentry
*, unsigned int);
152 extern struct dentry
*proc_lookup_de(struct proc_dir_entry
*, struct inode
*,
154 extern int proc_readdir(struct file
*, struct dir_context
*);
155 extern int proc_readdir_de(struct proc_dir_entry
*, struct file
*, struct dir_context
*);
157 static inline struct proc_dir_entry
*pde_get(struct proc_dir_entry
*pde
)
159 atomic_inc(&pde
->count
);
162 extern void pde_put(struct proc_dir_entry
*);
164 static inline bool is_empty_pde(const struct proc_dir_entry
*pde
)
166 return S_ISDIR(pde
->mode
) && !pde
->proc_iops
;
176 struct completion
*c
;
178 extern const struct inode_operations proc_link_inode_operations
;
180 extern const struct inode_operations proc_pid_link_inode_operations
;
182 extern void proc_init_inodecache(void);
183 void set_proc_pid_nlink(void);
184 extern struct inode
*proc_get_inode(struct super_block
*, struct proc_dir_entry
*);
185 extern int proc_fill_super(struct super_block
*, void *data
, int flags
);
186 extern void proc_entry_rundown(struct proc_dir_entry
*);
191 extern const struct inode_operations proc_ns_dir_inode_operations
;
192 extern const struct file_operations proc_ns_dir_operations
;
197 extern const struct file_operations proc_net_operations
;
198 extern const struct inode_operations proc_net_inode_operations
;
201 extern int proc_net_init(void);
203 static inline int proc_net_init(void) { return 0; }
209 extern int proc_setup_self(struct super_block
*);
214 extern int proc_setup_thread_self(struct super_block
*);
215 extern void proc_thread_self_init(void);
220 #ifdef CONFIG_PROC_SYSCTL
221 extern int proc_sys_init(void);
222 extern void proc_sys_evict_inode(struct inode
*inode
,
223 struct ctl_table_header
*head
);
225 static inline void proc_sys_init(void) { }
226 static inline void proc_sys_evict_inode(struct inode
*inode
,
227 struct ctl_table_header
*head
) { }
234 extern void proc_tty_init(void);
236 static inline void proc_tty_init(void) {}
242 extern struct proc_dir_entry proc_root
;
243 extern int proc_parse_options(char *options
, struct pid_namespace
*pid
);
245 extern void proc_self_init(void);
246 extern int proc_remount(struct super_block
*, int *, char *);
251 struct mem_size_stats
;
252 struct proc_maps_private
{
254 struct task_struct
*task
;
255 struct mm_struct
*mm
;
256 struct mem_size_stats
*rollup
;
258 struct vm_area_struct
*tail_vma
;
261 struct mempolicy
*task_mempolicy
;
263 } __randomize_layout
;
265 struct mm_struct
*proc_mem_open(struct inode
*inode
, unsigned int mode
);
267 extern const struct file_operations proc_pid_maps_operations
;
268 extern const struct file_operations proc_tid_maps_operations
;
269 extern const struct file_operations proc_pid_numa_maps_operations
;
270 extern const struct file_operations proc_tid_numa_maps_operations
;
271 extern const struct file_operations proc_pid_smaps_operations
;
272 extern const struct file_operations proc_pid_smaps_rollup_operations
;
273 extern const struct file_operations proc_tid_smaps_operations
;
274 extern const struct file_operations proc_clear_refs_operations
;
275 extern const struct file_operations proc_pagemap_operations
;
277 extern unsigned long task_vsize(struct mm_struct
*);
278 extern unsigned long task_statm(struct mm_struct
*,
279 unsigned long *, unsigned long *,
280 unsigned long *, unsigned long *);
281 extern void task_mem(struct seq_file
*, struct mm_struct
*);