x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / fs / proc / internal.h
blob18694598bebfb4781c79cb9c75107f37e54349c4
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;
21 struct mempolicy;
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 {
34 unsigned int low_ino;
35 umode_t mode;
36 nlink_t nlink;
37 kuid_t uid;
38 kgid_t gid;
39 loff_t size;
40 const struct inode_operations *proc_iops;
41 const struct file_operations *proc_fops;
42 struct proc_dir_entry *parent;
43 struct rb_root subdir;
44 struct rb_node subdir_node;
45 void *data;
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 */
52 u8 namelen;
53 char name[];
56 union proc_op {
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);
63 struct proc_inode {
64 struct pid *pid;
65 unsigned int fd;
66 union proc_op op;
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;
76 * General functions
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, mode_t mode,
104 kuid_t *ruid, kgid_t *rgid);
106 static inline unsigned name_to_int(const struct qstr *qstr)
108 const char *name = qstr->name;
109 int len = qstr->len;
110 unsigned n = 0;
112 if (len > 1 && *name == '0')
113 goto out;
114 while (len-- > 0) {
115 unsigned c = *name++ - '0';
116 if (c > 9)
117 goto out;
118 if (n >= (~0U-9)/10)
119 goto out;
120 n *= 10;
121 n += c;
123 return n;
124 out:
125 return ~0U;
129 * Offset of the first process in the /proc root directory..
131 #define FIRST_PROCESS_ENTRY 256
133 /* Worst case buffer size needed for holding an integer. */
134 #define PROC_NUMBUF 13
137 * array.c
139 extern const struct file_operations proc_tid_children_operations;
141 extern int proc_tid_stat(struct seq_file *, struct pid_namespace *,
142 struct pid *, struct task_struct *);
143 extern int proc_tgid_stat(struct seq_file *, struct pid_namespace *,
144 struct pid *, struct task_struct *);
145 extern int proc_pid_status(struct seq_file *, struct pid_namespace *,
146 struct pid *, struct task_struct *);
147 extern int proc_pid_statm(struct seq_file *, struct pid_namespace *,
148 struct pid *, struct task_struct *);
151 * base.c
153 extern const struct dentry_operations pid_dentry_operations;
154 extern int pid_getattr(const struct path *, struct kstat *, u32, unsigned int);
155 extern int proc_setattr(struct dentry *, struct iattr *);
156 extern struct inode *proc_pid_make_inode(struct super_block *, struct task_struct *, umode_t);
157 extern int pid_revalidate(struct dentry *, unsigned int);
158 extern int pid_delete_dentry(const struct dentry *);
159 extern int proc_pid_readdir(struct file *, struct dir_context *);
160 extern struct dentry *proc_pid_lookup(struct inode *, struct dentry *, unsigned int);
161 extern loff_t mem_lseek(struct file *, loff_t, int);
163 /* Lookups */
164 typedef int instantiate_t(struct inode *, struct dentry *,
165 struct task_struct *, const void *);
166 extern bool proc_fill_cache(struct file *, struct dir_context *, const char *, int,
167 instantiate_t, struct task_struct *, const void *);
170 * generic.c
172 extern struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
173 extern struct dentry *proc_lookup_de(struct proc_dir_entry *, struct inode *,
174 struct dentry *);
175 extern int proc_readdir(struct file *, struct dir_context *);
176 extern int proc_readdir_de(struct proc_dir_entry *, struct file *, struct dir_context *);
178 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
180 atomic_inc(&pde->count);
181 return pde;
183 extern void pde_put(struct proc_dir_entry *);
185 static inline bool is_empty_pde(const struct proc_dir_entry *pde)
187 return S_ISDIR(pde->mode) && !pde->proc_iops;
191 * inode.c
193 struct pde_opener {
194 struct file *file;
195 struct list_head lh;
196 bool closing;
197 struct completion *c;
199 extern const struct inode_operations proc_link_inode_operations;
201 extern const struct inode_operations proc_pid_link_inode_operations;
203 extern void proc_init_inodecache(void);
204 void set_proc_pid_nlink(void);
205 extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
206 extern int proc_fill_super(struct super_block *, void *data, int flags);
207 extern void proc_entry_rundown(struct proc_dir_entry *);
210 * proc_namespaces.c
212 extern const struct inode_operations proc_ns_dir_inode_operations;
213 extern const struct file_operations proc_ns_dir_operations;
216 * proc_net.c
218 extern const struct file_operations proc_net_operations;
219 extern const struct inode_operations proc_net_inode_operations;
221 #ifdef CONFIG_NET
222 extern int proc_net_init(void);
223 #else
224 static inline int proc_net_init(void) { return 0; }
225 #endif
228 * proc_self.c
230 extern int proc_setup_self(struct super_block *);
233 * proc_thread_self.c
235 extern int proc_setup_thread_self(struct super_block *);
236 extern void proc_thread_self_init(void);
239 * proc_sysctl.c
241 #ifdef CONFIG_PROC_SYSCTL
242 extern int proc_sys_init(void);
243 extern void proc_sys_evict_inode(struct inode *inode,
244 struct ctl_table_header *head);
245 #else
246 static inline void proc_sys_init(void) { }
247 static inline void proc_sys_evict_inode(struct inode *inode,
248 struct ctl_table_header *head) { }
249 #endif
252 * proc_tty.c
254 #ifdef CONFIG_TTY
255 extern void proc_tty_init(void);
256 #else
257 static inline void proc_tty_init(void) {}
258 #endif
261 * root.c
263 extern struct proc_dir_entry proc_root;
264 extern int proc_parse_options(char *options, struct pid_namespace *pid);
266 extern void proc_self_init(void);
267 extern int proc_remount(struct super_block *, int *, char *);
270 * task_[no]mmu.c
272 struct proc_maps_private {
273 struct inode *inode;
274 struct task_struct *task;
275 struct mm_struct *mm;
276 #ifdef CONFIG_MMU
277 struct vm_area_struct *tail_vma;
278 #endif
279 #ifdef CONFIG_NUMA
280 struct mempolicy *task_mempolicy;
281 #endif
284 struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode);
286 extern const struct file_operations proc_pid_maps_operations;
287 extern const struct file_operations proc_tid_maps_operations;
288 extern const struct file_operations proc_pid_numa_maps_operations;
289 extern const struct file_operations proc_tid_numa_maps_operations;
290 extern const struct file_operations proc_pid_smaps_operations;
291 extern const struct file_operations proc_tid_smaps_operations;
292 extern const struct file_operations proc_clear_refs_operations;
293 extern const struct file_operations proc_pagemap_operations;
295 extern unsigned long task_vsize(struct mm_struct *);
296 extern unsigned long task_statm(struct mm_struct *,
297 unsigned long *, unsigned long *,
298 unsigned long *, unsigned long *);
299 extern void task_mem(struct seq_file *, struct mm_struct *);