Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Cyrill Gorcunov | faf60af | 2012-08-23 14:43:24 +0400 | [diff] [blame] | 12 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/proc_fs.h> |
Kees Cook | e579d2c | 2013-02-27 17:03:15 -0800 | [diff] [blame] | 14 | #include <linux/binfmts.h> |
Eric W. Biederman | 1f87f0b | 2012-01-06 04:07:15 -0800 | [diff] [blame] | 15 | struct ctl_table_header; |
KAMEZAWA Hiroyuki | 9e78144 | 2012-10-19 17:00:55 +0900 | [diff] [blame] | 16 | struct mempolicy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Alexey Dobriyan | c74c120 | 2008-04-29 01:01:44 -0700 | [diff] [blame] | 18 | extern struct proc_dir_entry proc_root; |
Eric W. Biederman | e656d8a | 2010-07-10 14:52:49 -0700 | [diff] [blame] | 19 | extern void proc_self_init(void); |
Andrew Morton | 05565b6 | 2007-04-01 23:49:35 -0700 | [diff] [blame] | 20 | #ifdef CONFIG_PROC_SYSCTL |
Eric W. Biederman | 77b14db | 2007-02-14 00:34:12 -0800 | [diff] [blame] | 21 | extern int proc_sys_init(void); |
Eric W. Biederman | 1f87f0b | 2012-01-06 04:07:15 -0800 | [diff] [blame] | 22 | extern void sysctl_head_put(struct ctl_table_header *head); |
Andrew Morton | 05565b6 | 2007-04-01 23:49:35 -0700 | [diff] [blame] | 23 | #else |
| 24 | static inline void proc_sys_init(void) { } |
Eric W. Biederman | 1f87f0b | 2012-01-06 04:07:15 -0800 | [diff] [blame] | 25 | static inline void sysctl_head_put(struct ctl_table_header *head) { } |
Andrew Morton | 05565b6 | 2007-04-01 23:49:35 -0700 | [diff] [blame] | 26 | #endif |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 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 |
Eric W. Biederman | 77b14db | 2007-02-14 00:34:12 -0800 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #endif |
| 50 | |
Eric W. Biederman | ee99274 | 2008-02-08 04:18:31 -0800 | [diff] [blame] | 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); |
Eric W. Biederman | df5f831 | 2008-02-08 04:18:33 -0800 | [diff] [blame] | 55 | extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
| 56 | struct pid *pid, struct task_struct *task); |
Eric W. Biederman | a56d3fc | 2008-02-08 04:18:32 -0800 | [diff] [blame] | 57 | extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
| 58 | struct pid *pid, struct task_struct *task); |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 59 | extern loff_t mem_lseek(struct file *file, loff_t offset, int orig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Cyrill Gorcunov | 81841161 | 2012-05-31 16:26:43 -0700 | [diff] [blame] | 61 | extern const struct file_operations proc_tid_children_operations; |
Siddhesh Poyarekar | b764375 | 2012-03-21 16:34:04 -0700 | [diff] [blame] | 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; |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 68 | extern const struct file_operations proc_clear_refs_operations; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 69 | extern const struct file_operations proc_pagemap_operations; |
Pavel Emelyanov | e9720ac | 2008-03-07 11:08:40 -0800 | [diff] [blame] | 70 | extern const struct file_operations proc_net_operations; |
| 71 | extern const struct inode_operations proc_net_inode_operations; |
Cyrill Gorcunov | faf60af | 2012-08-23 14:43:24 +0400 | [diff] [blame] | 72 | extern const struct inode_operations proc_pid_link_inode_operations; |
Eric W. Biederman | 99f8955 | 2006-06-26 00:25:55 -0700 | [diff] [blame] | 73 | |
Stephen Wilson | f2beb79 | 2011-05-24 17:12:48 -0700 | [diff] [blame] | 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 |
KAMEZAWA Hiroyuki | 9e78144 | 2012-10-19 17:00:55 +0900 | [diff] [blame] | 80 | #ifdef CONFIG_NUMA |
| 81 | struct mempolicy *task_mempolicy; |
| 82 | #endif |
Stephen Wilson | f2beb79 | 2011-05-24 17:12:48 -0700 | [diff] [blame] | 83 | }; |
| 84 | |
Alexey Dobriyan | 5bcd7ff | 2008-10-17 03:43:55 +0400 | [diff] [blame] | 85 | void proc_init_inodecache(void); |
Adrian Bunk | fee781e | 2006-01-08 01:04:16 -0800 | [diff] [blame] | 86 | |
Eric W. Biederman | 13b41b0 | 2006-06-26 00:25:56 -0700 | [diff] [blame] | 87 | static inline struct pid *proc_pid(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
Eric W. Biederman | 13b41b0 | 2006-06-26 00:25:56 -0700 | [diff] [blame] | 89 | return PROC_I(inode)->pid; |
Eric W. Biederman | 99f8955 | 2006-06-26 00:25:55 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static inline struct task_struct *get_proc_task(struct inode *inode) |
| 93 | { |
Eric W. Biederman | 13b41b0 | 2006-06-26 00:25:56 -0700 | [diff] [blame] | 94 | return get_pid_task(proc_pid(inode), PIDTYPE_PID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
Eric W. Biederman | aed7a6c | 2006-06-26 00:25:44 -0700 | [diff] [blame] | 97 | static inline int proc_fd(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | { |
Eric W. Biederman | aed7a6c | 2006-06-26 00:25:44 -0700 | [diff] [blame] | 99 | return PROC_I(inode)->fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
Pavel Emelyanov | e9720ac | 2008-03-07 11:08:40 -0800 | [diff] [blame] | 101 | |
Cyrill Gorcunov | faf60af | 2012-08-23 14:43:24 +0400 | [diff] [blame] | 102 | static inline int task_dumpable(struct task_struct *task) |
| 103 | { |
| 104 | int dumpable = 0; |
| 105 | struct mm_struct *mm; |
| 106 | |
| 107 | task_lock(task); |
| 108 | mm = task->mm; |
| 109 | if (mm) |
| 110 | dumpable = get_dumpable(mm); |
| 111 | task_unlock(task); |
Kees Cook | e579d2c | 2013-02-27 17:03:15 -0800 | [diff] [blame] | 112 | if (dumpable == SUID_DUMP_USER) |
Cyrill Gorcunov | faf60af | 2012-08-23 14:43:24 +0400 | [diff] [blame] | 113 | return 1; |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static inline int pid_delete_dentry(const struct dentry * dentry) |
| 118 | { |
| 119 | /* Is the task we represent dead? |
| 120 | * If so, then don't put the dentry on the lru list, |
| 121 | * kill it immediately. |
| 122 | */ |
| 123 | return !proc_pid(dentry->d_inode)->tasks[PIDTYPE_PID].first; |
| 124 | } |
| 125 | |
| 126 | static inline unsigned name_to_int(struct dentry *dentry) |
| 127 | { |
| 128 | const char *name = dentry->d_name.name; |
| 129 | int len = dentry->d_name.len; |
| 130 | unsigned n = 0; |
| 131 | |
| 132 | if (len > 1 && *name == '0') |
| 133 | goto out; |
| 134 | while (len-- > 0) { |
| 135 | unsigned c = *name++ - '0'; |
| 136 | if (c > 9) |
| 137 | goto out; |
| 138 | if (n >= (~0U-9)/10) |
| 139 | goto out; |
| 140 | n *= 10; |
| 141 | n += c; |
| 142 | } |
| 143 | return n; |
| 144 | out: |
| 145 | return ~0U; |
| 146 | } |
| 147 | |
Pavel Emelyanov | e9720ac | 2008-03-07 11:08:40 -0800 | [diff] [blame] | 148 | struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino, |
| 149 | struct dentry *dentry); |
| 150 | int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent, |
| 151 | filldir_t filldir); |
Alexey Dobriyan | 881adb8 | 2008-07-25 01:48:29 -0700 | [diff] [blame] | 152 | |
| 153 | struct pde_opener { |
| 154 | struct inode *inode; |
| 155 | struct file *file; |
| 156 | int (*release)(struct inode *, struct file *); |
| 157 | struct list_head lh; |
| 158 | }; |
Alexey Dobriyan | 3dec7f5 | 2009-02-20 17:04:33 +0300 | [diff] [blame] | 159 | void pde_users_dec(struct proc_dir_entry *pde); |
Al Viro | 3174c21 | 2009-04-07 13:19:18 -0400 | [diff] [blame] | 160 | |
| 161 | extern spinlock_t proc_subdir_lock; |
| 162 | |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 163 | struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int); |
Al Viro | 3174c21 | 2009-04-07 13:19:18 -0400 | [diff] [blame] | 164 | int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); |
| 165 | unsigned long task_vsize(struct mm_struct *); |
Alexey Dobriyan | a2ade7b | 2011-01-12 17:00:32 -0800 | [diff] [blame] | 166 | unsigned long task_statm(struct mm_struct *, |
| 167 | unsigned long *, unsigned long *, unsigned long *, unsigned long *); |
Al Viro | 3174c21 | 2009-04-07 13:19:18 -0400 | [diff] [blame] | 168 | void task_mem(struct seq_file *, struct mm_struct *); |
| 169 | |
Alexey Dobriyan | 135d565 | 2009-12-15 16:45:39 -0800 | [diff] [blame] | 170 | static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) |
| 171 | { |
| 172 | atomic_inc(&pde->count); |
| 173 | return pde; |
| 174 | } |
| 175 | void pde_put(struct proc_dir_entry *pde); |
Al Viro | 3174c21 | 2009-04-07 13:19:18 -0400 | [diff] [blame] | 176 | |
Al Viro | 3174c21 | 2009-04-07 13:19:18 -0400 | [diff] [blame] | 177 | int proc_fill_super(struct super_block *); |
Alexey Dobriyan | 6d1b6e4 | 2011-01-12 17:00:33 -0800 | [diff] [blame] | 178 | struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); |
Vasiliy Kulikov | 9741295 | 2012-01-10 15:11:27 -0800 | [diff] [blame] | 179 | int proc_remount(struct super_block *sb, int *flags, char *data); |
Al Viro | 3174c21 | 2009-04-07 13:19:18 -0400 | [diff] [blame] | 180 | |
| 181 | /* |
| 182 | * These are generic /proc routines that use the internal |
| 183 | * "struct proc_dir_entry" tree to traverse the filesystem. |
| 184 | * |
| 185 | * The /proc root directory has extended versions to take care |
| 186 | * of the /proc/<pid> subdirectories. |
| 187 | */ |
| 188 | int proc_readdir(struct file *, void *, filldir_t); |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 189 | struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int); |
Eric W. Biederman | 6b4e306 | 2010-03-07 16:41:34 -0800 | [diff] [blame] | 190 | |
| 191 | |
| 192 | |
| 193 | /* Lookups */ |
| 194 | typedef struct dentry *instantiate_t(struct inode *, struct dentry *, |
| 195 | struct task_struct *, const void *); |
| 196 | int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir, |
| 197 | const char *name, int len, |
| 198 | instantiate_t instantiate, struct task_struct *task, const void *ptr); |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 199 | int pid_revalidate(struct dentry *dentry, unsigned int flags); |
Eric W. Biederman | 6b4e306 | 2010-03-07 16:41:34 -0800 | [diff] [blame] | 200 | struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task); |
| 201 | extern const struct dentry_operations pid_dentry_operations; |
| 202 | int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); |
| 203 | int proc_setattr(struct dentry *dentry, struct iattr *attr); |
| 204 | |
| 205 | extern const struct inode_operations proc_ns_dir_inode_operations; |
| 206 | extern const struct file_operations proc_ns_dir_operations; |
| 207 | |