1 /* Internal procfs definitions
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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/refcount.h>
15 #include <linux/spinlock.h>
16 #include <linux/atomic.h>
17 #include <linux/binfmts.h>
18 #include <linux/sched/coredump.h>
19 #include <linux/sched/task.h>
21 struct ctl_table_header;
25 * This is not completely implemented yet. The idea is to
26 * create an in-memory tree (like the actual /proc filesystem
27 * tree) of these proc_dir_entries, so that we can dynamically
28 * add new files to /proc.
30 * parent/subdir are used for the directory structure (every /proc file has a
31 * parent, but "subdir" is empty for all non-directory entries).
32 * subdir_node is used to build the rb tree "subdir" of the parent.
34 struct proc_dir_entry {
36 * number of callers into module in progress;
37 * negative -> it's going away RSN
41 struct list_head pde_openers; /* who did ->open, but not ->release */
42 /* protects ->pde_openers and all struct pde_opener instances */
43 spinlock_t pde_unload_lock;
44 struct completion *pde_unload_completion;
45 const struct inode_operations *proc_iops;
46 const struct file_operations *proc_fops;
47 const struct dentry_operations *proc_dops;
49 const struct seq_operations *seq_ops;
50 int (*single_show)(struct seq_file *, void *);
54 unsigned int state_size;
60 struct proc_dir_entry *parent;
61 struct rb_root subdir;
62 struct rb_node subdir_node;
69 #define SIZEOF_PDE ( \
70 sizeof(struct proc_dir_entry) < 128 ? 128 : \
71 sizeof(struct proc_dir_entry) < 192 ? 192 : \
72 sizeof(struct proc_dir_entry) < 256 ? 256 : \
73 sizeof(struct proc_dir_entry) < 512 ? 512 : \
75 #define SIZEOF_PDE_INLINE_NAME (SIZEOF_PDE - sizeof(struct proc_dir_entry))
77 extern struct kmem_cache *proc_dir_entry_cache;
78 void pde_free(struct proc_dir_entry *pde);
81 int (*proc_get_link)(struct dentry *, struct path *);
82 int (*proc_show)(struct seq_file *m,
83 struct pid_namespace *ns, struct pid *pid,
84 struct task_struct *task);
92 struct proc_dir_entry *pde;
93 struct ctl_table_header *sysctl;
94 struct ctl_table *sysctl_entry;
95 struct hlist_node sysctl_inodes;
96 const struct proc_ns_operations *ns_ops;
97 struct inode vfs_inode;
103 static inline struct proc_inode *PROC_I(const struct inode *inode)
105 return container_of(inode, struct proc_inode, vfs_inode);
108 static inline struct proc_dir_entry *PDE(const struct inode *inode)
110 return PROC_I(inode)->pde;
113 static inline void *__PDE_DATA(const struct inode *inode)
115 return PDE(inode)->data;
118 static inline struct pid *proc_pid(const struct inode *inode)
120 return PROC_I(inode)->pid;
123 static inline struct task_struct *get_proc_task(const struct inode *inode)
125 return get_pid_task(proc_pid(inode), PIDTYPE_PID);
128 void task_dump_owner(struct task_struct *task, umode_t mode,
129 kuid_t *ruid, kgid_t *rgid);
131 unsigned name_to_int(const struct qstr *qstr);
133 * Offset of the first process in the /proc root directory..
135 #define FIRST_PROCESS_ENTRY 256
137 /* Worst case buffer size needed for holding an integer. */
138 #define PROC_NUMBUF 13
143 extern const struct file_operations proc_tid_children_operations;
145 extern void proc_task_name(struct seq_file *m, struct task_struct *p,
147 extern int proc_tid_stat(struct seq_file *, struct pid_namespace *,
148 struct pid *, struct task_struct *);
149 extern int proc_tgid_stat(struct seq_file *, struct pid_namespace *,
150 struct pid *, struct task_struct *);
151 extern int proc_pid_status(struct seq_file *, struct pid_namespace *,
152 struct pid *, struct task_struct *);
153 extern int proc_pid_statm(struct seq_file *, struct pid_namespace *,
154 struct pid *, struct task_struct *);
159 extern const struct dentry_operations pid_dentry_operations;
160 extern int pid_getattr(const struct path *, struct kstat *, u32, unsigned int);
161 extern int proc_setattr(struct dentry *, struct iattr *);
162 extern struct inode *proc_pid_make_inode(struct super_block *, struct task_struct *, umode_t);
163 extern void pid_update_inode(struct task_struct *, struct inode *);
164 extern int pid_delete_dentry(const struct dentry *);
165 extern int proc_pid_readdir(struct file *, struct dir_context *);
166 struct dentry *proc_pid_lookup(struct dentry *, unsigned int);
167 extern loff_t mem_lseek(struct file *, loff_t, int);
170 typedef struct dentry *instantiate_t(struct dentry *,
171 struct task_struct *, const void *);
172 bool proc_fill_cache(struct file *, struct dir_context *, const char *, unsigned int,
173 instantiate_t, struct task_struct *, const void *);
178 struct proc_dir_entry *proc_create_reg(const char *name, umode_t mode,
179 struct proc_dir_entry **parent, void *data);
180 struct proc_dir_entry *proc_register(struct proc_dir_entry *dir,
181 struct proc_dir_entry *dp);
182 extern struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
183 struct dentry *proc_lookup_de(struct inode *, struct dentry *, struct proc_dir_entry *);
184 extern int proc_readdir(struct file *, struct dir_context *);
185 int proc_readdir_de(struct file *, struct dir_context *, struct proc_dir_entry *);
187 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
189 refcount_inc(&pde->refcnt);
192 extern void pde_put(struct proc_dir_entry *);
194 static inline bool is_empty_pde(const struct proc_dir_entry *pde)
196 return S_ISDIR(pde->mode) && !pde->proc_iops;
198 extern ssize_t proc_simple_write(struct file *, const char __user *, size_t, loff_t *);
207 struct completion *c;
208 } __randomize_layout;
209 extern const struct inode_operations proc_link_inode_operations;
210 extern const struct inode_operations proc_pid_link_inode_operations;
211 extern const struct super_operations proc_sops;
213 void proc_init_kmemcache(void);
214 void set_proc_pid_nlink(void);
215 extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
216 extern void proc_entry_rundown(struct proc_dir_entry *);
221 extern const struct inode_operations proc_ns_dir_inode_operations;
222 extern const struct file_operations proc_ns_dir_operations;
227 extern const struct file_operations proc_net_operations;
228 extern const struct inode_operations proc_net_inode_operations;
231 extern int proc_net_init(void);
233 static inline int proc_net_init(void) { return 0; }
239 extern int proc_setup_self(struct super_block *);
244 extern int proc_setup_thread_self(struct super_block *);
245 extern void proc_thread_self_init(void);
250 #ifdef CONFIG_PROC_SYSCTL
251 extern int proc_sys_init(void);
252 extern void proc_sys_evict_inode(struct inode *inode,
253 struct ctl_table_header *head);
255 static inline void proc_sys_init(void) { }
256 static inline void proc_sys_evict_inode(struct inode *inode,
257 struct ctl_table_header *head) { }
264 extern void proc_tty_init(void);
266 static inline void proc_tty_init(void) {}
272 extern struct proc_dir_entry proc_root;
274 extern void proc_self_init(void);
279 struct mem_size_stats;
280 struct proc_maps_private {
282 struct task_struct *task;
283 struct mm_struct *mm;
285 struct vm_area_struct *tail_vma;
288 struct mempolicy *task_mempolicy;
290 } __randomize_layout;
292 struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode);
294 extern const struct file_operations proc_pid_maps_operations;
295 extern const struct file_operations proc_pid_numa_maps_operations;
296 extern const struct file_operations proc_pid_smaps_operations;
297 extern const struct file_operations proc_pid_smaps_rollup_operations;
298 extern const struct file_operations proc_clear_refs_operations;
299 extern const struct file_operations proc_pagemap_operations;
301 extern unsigned long task_vsize(struct mm_struct *);
302 extern unsigned long task_statm(struct mm_struct *,
303 unsigned long *, unsigned long *,
304 unsigned long *, unsigned long *);
305 extern void task_mem(struct seq_file *, struct mm_struct *);