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1da177e4 LT |
1 | /* internal.h: internal procfs definitions |
2 | * | |
3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
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. | |
10 | */ | |
11 | ||
faf60af1 | 12 | #include <linux/sched.h> |
1da177e4 | 13 | #include <linux/proc_fs.h> |
e579d2c2 | 14 | #include <linux/binfmts.h> |
1f87f0b5 | 15 | struct ctl_table_header; |
9e781440 | 16 | struct mempolicy; |
1da177e4 | 17 | |
c74c120a | 18 | extern struct proc_dir_entry proc_root; |
e656d8a6 | 19 | extern void proc_self_init(void); |
05565b65 | 20 | #ifdef CONFIG_PROC_SYSCTL |
77b14db5 | 21 | extern int proc_sys_init(void); |
1f87f0b5 | 22 | extern void sysctl_head_put(struct ctl_table_header *head); |
05565b65 AM |
23 | #else |
24 | static inline void proc_sys_init(void) { } | |
1f87f0b5 | 25 | static inline void sysctl_head_put(struct ctl_table_header *head) { } |
05565b65 | 26 | #endif |
457c4cbc EB |
27 | #ifdef CONFIG_NET |
28 | extern int proc_net_init(void); | |
29 | #else | |
30 | static inline int proc_net_init(void) { return 0; } | |
31 | #endif | |
77b14db5 | 32 | |
1da177e4 LT |
33 | struct vmalloc_info { |
34 | unsigned long used; | |
35 | unsigned long largest_chunk; | |
36 | }; | |
37 | ||
38 | #ifdef CONFIG_MMU | |
39 | #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START) | |
40 | extern void get_vmalloc_info(struct vmalloc_info *vmi); | |
41 | #else | |
42 | ||
43 | #define VMALLOC_TOTAL 0UL | |
44 | #define get_vmalloc_info(vmi) \ | |
45 | do { \ | |
46 | (vmi)->used = 0; \ | |
47 | (vmi)->largest_chunk = 0; \ | |
48 | } while(0) | |
1da177e4 LT |
49 | #endif |
50 | ||
ee992744 EB |
51 | extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, |
52 | struct pid *pid, struct task_struct *task); | |
53 | extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, | |
54 | struct pid *pid, struct task_struct *task); | |
df5f8314 EB |
55 | extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
56 | struct pid *pid, struct task_struct *task); | |
a56d3fc7 EB |
57 | extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
58 | struct pid *pid, struct task_struct *task); | |
85863e47 | 59 | extern loff_t mem_lseek(struct file *file, loff_t offset, int orig); |
1da177e4 | 60 | |
81841161 | 61 | extern const struct file_operations proc_tid_children_operations; |
b7643757 SP |
62 | extern const struct file_operations proc_pid_maps_operations; |
63 | extern const struct file_operations proc_tid_maps_operations; | |
64 | extern const struct file_operations proc_pid_numa_maps_operations; | |
65 | extern const struct file_operations proc_tid_numa_maps_operations; | |
66 | extern const struct file_operations proc_pid_smaps_operations; | |
67 | extern const struct file_operations proc_tid_smaps_operations; | |
f248dcb3 | 68 | extern const struct file_operations proc_clear_refs_operations; |
85863e47 | 69 | extern const struct file_operations proc_pagemap_operations; |
e9720acd PE |
70 | extern const struct file_operations proc_net_operations; |
71 | extern const struct inode_operations proc_net_inode_operations; | |
faf60af1 | 72 | extern const struct inode_operations proc_pid_link_inode_operations; |
99f89551 | 73 | |
f2beb798 SW |
74 | struct proc_maps_private { |
75 | struct pid *pid; | |
76 | struct task_struct *task; | |
77 | #ifdef CONFIG_MMU | |
78 | struct vm_area_struct *tail_vma; | |
79 | #endif | |
9e781440 KH |
80 | #ifdef CONFIG_NUMA |
81 | struct mempolicy *task_mempolicy; | |
82 | #endif | |
f2beb798 SW |
83 | }; |
84 | ||
5bcd7ff9 | 85 | void proc_init_inodecache(void); |
fee781e6 | 86 | |
c30480b9 DH |
87 | /* |
88 | * General functions | |
89 | */ | |
90 | static inline struct proc_inode *PROC_I(const struct inode *inode) | |
91 | { | |
92 | return container_of(inode, struct proc_inode, vfs_inode); | |
93 | } | |
94 | ||
95 | static inline struct proc_dir_entry *PDE(const struct inode *inode) | |
96 | { | |
97 | return PROC_I(inode)->pde; | |
98 | } | |
99 | ||
100 | static inline void *__PDE_DATA(const struct inode *inode) | |
101 | { | |
102 | return PDE(inode)->data; | |
103 | } | |
104 | ||
13b41b09 | 105 | static inline struct pid *proc_pid(struct inode *inode) |
99f89551 | 106 | { |
13b41b09 | 107 | return PROC_I(inode)->pid; |
99f89551 EB |
108 | } |
109 | ||
110 | static inline struct task_struct *get_proc_task(struct inode *inode) | |
1da177e4 | 111 | { |
13b41b09 | 112 | return get_pid_task(proc_pid(inode), PIDTYPE_PID); |
1da177e4 LT |
113 | } |
114 | ||
faf60af1 CG |
115 | static inline int task_dumpable(struct task_struct *task) |
116 | { | |
117 | int dumpable = 0; | |
118 | struct mm_struct *mm; | |
119 | ||
120 | task_lock(task); | |
121 | mm = task->mm; | |
122 | if (mm) | |
123 | dumpable = get_dumpable(mm); | |
124 | task_unlock(task); | |
e579d2c2 | 125 | if (dumpable == SUID_DUMP_USER) |
faf60af1 CG |
126 | return 1; |
127 | return 0; | |
128 | } | |
129 | ||
faf60af1 CG |
130 | static inline unsigned name_to_int(struct dentry *dentry) |
131 | { | |
132 | const char *name = dentry->d_name.name; | |
133 | int len = dentry->d_name.len; | |
134 | unsigned n = 0; | |
135 | ||
136 | if (len > 1 && *name == '0') | |
137 | goto out; | |
138 | while (len-- > 0) { | |
139 | unsigned c = *name++ - '0'; | |
140 | if (c > 9) | |
141 | goto out; | |
142 | if (n >= (~0U-9)/10) | |
143 | goto out; | |
144 | n *= 10; | |
145 | n += c; | |
146 | } | |
147 | return n; | |
148 | out: | |
149 | return ~0U; | |
150 | } | |
151 | ||
1dd704b6 DH |
152 | /* |
153 | * base.c | |
154 | */ | |
155 | extern int pid_delete_dentry(const struct dentry *); | |
156 | ||
e9720acd PE |
157 | struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino, |
158 | struct dentry *dentry); | |
159 | int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent, | |
160 | filldir_t filldir); | |
881adb85 AD |
161 | |
162 | struct pde_opener { | |
881adb85 | 163 | struct file *file; |
881adb85 | 164 | struct list_head lh; |
05c0ae21 AV |
165 | int closing; |
166 | struct completion *c; | |
881adb85 | 167 | }; |
866ad9a7 | 168 | |
866ad9a7 | 169 | void proc_entry_rundown(struct proc_dir_entry *); |
3174c21b AV |
170 | |
171 | extern spinlock_t proc_subdir_lock; | |
172 | ||
00cd8dd3 | 173 | struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int); |
3174c21b AV |
174 | int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); |
175 | unsigned long task_vsize(struct mm_struct *); | |
a2ade7b6 AD |
176 | unsigned long task_statm(struct mm_struct *, |
177 | unsigned long *, unsigned long *, unsigned long *, unsigned long *); | |
3174c21b AV |
178 | void task_mem(struct seq_file *, struct mm_struct *); |
179 | ||
135d5655 AD |
180 | static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) |
181 | { | |
182 | atomic_inc(&pde->count); | |
183 | return pde; | |
184 | } | |
185 | void pde_put(struct proc_dir_entry *pde); | |
3174c21b | 186 | |
3174c21b | 187 | int proc_fill_super(struct super_block *); |
6d1b6e4e | 188 | struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); |
97412950 | 189 | int proc_remount(struct super_block *sb, int *flags, char *data); |
3174c21b AV |
190 | |
191 | /* | |
192 | * These are generic /proc routines that use the internal | |
193 | * "struct proc_dir_entry" tree to traverse the filesystem. | |
194 | * | |
195 | * The /proc root directory has extended versions to take care | |
196 | * of the /proc/<pid> subdirectories. | |
197 | */ | |
198 | int proc_readdir(struct file *, void *, filldir_t); | |
00cd8dd3 | 199 | struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int); |
6b4e306a EB |
200 | |
201 | ||
202 | ||
203 | /* Lookups */ | |
204 | typedef struct dentry *instantiate_t(struct inode *, struct dentry *, | |
205 | struct task_struct *, const void *); | |
206 | int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir, | |
207 | const char *name, int len, | |
208 | instantiate_t instantiate, struct task_struct *task, const void *ptr); | |
0b728e19 | 209 | int pid_revalidate(struct dentry *dentry, unsigned int flags); |
6b4e306a EB |
210 | struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task); |
211 | extern const struct dentry_operations pid_dentry_operations; | |
212 | int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); | |
213 | int proc_setattr(struct dentry *dentry, struct iattr *attr); | |
214 | ||
215 | extern const struct inode_operations proc_ns_dir_inode_operations; | |
216 | extern const struct file_operations proc_ns_dir_operations; | |
217 | ||
021ada7d | 218 | extern int proc_setup_self(struct super_block *); |
34db8aaf DH |
219 | |
220 | /* | |
221 | * proc_devtree.c | |
222 | */ | |
223 | #ifdef CONFIG_PROC_DEVICETREE | |
224 | extern void proc_device_tree_init(void); | |
225 | #endif /* CONFIG_PROC_DEVICETREE */ | |
226 | ||
227 | /* | |
228 | * proc_tty.c | |
229 | */ | |
230 | #ifdef CONFIG_TTY | |
231 | extern void proc_tty_init(void); | |
232 | #else | |
233 | static inline void proc_tty_init(void) {} | |
234 | #endif |