| 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 | |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/proc_fs.h> |
| 14 | #include <linux/binfmts.h> |
| 15 | struct ctl_table_header; |
| 16 | struct mempolicy; |
| 17 | |
| 18 | extern struct proc_dir_entry proc_root; |
| 19 | extern void proc_self_init(void); |
| 20 | #ifdef CONFIG_PROC_SYSCTL |
| 21 | extern int proc_sys_init(void); |
| 22 | extern void sysctl_head_put(struct ctl_table_header *head); |
| 23 | #else |
| 24 | static inline void proc_sys_init(void) { } |
| 25 | static inline void sysctl_head_put(struct ctl_table_header *head) { } |
| 26 | #endif |
| 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 |
| 32 | |
| 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) |
| 49 | #endif |
| 50 | |
| 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); |
| 55 | extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
| 56 | struct pid *pid, struct task_struct *task); |
| 57 | extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
| 58 | struct pid *pid, struct task_struct *task); |
| 59 | extern loff_t mem_lseek(struct file *file, loff_t offset, int orig); |
| 60 | |
| 61 | extern const struct file_operations proc_tid_children_operations; |
| 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; |
| 68 | extern const struct file_operations proc_clear_refs_operations; |
| 69 | extern const struct file_operations proc_pagemap_operations; |
| 70 | extern const struct file_operations proc_net_operations; |
| 71 | extern const struct inode_operations proc_net_inode_operations; |
| 72 | extern const struct inode_operations proc_pid_link_inode_operations; |
| 73 | |
| 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 |
| 80 | #ifdef CONFIG_NUMA |
| 81 | struct mempolicy *task_mempolicy; |
| 82 | #endif |
| 83 | }; |
| 84 | |
| 85 | void proc_init_inodecache(void); |
| 86 | |
| 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 | |
| 105 | static inline struct pid *proc_pid(struct inode *inode) |
| 106 | { |
| 107 | return PROC_I(inode)->pid; |
| 108 | } |
| 109 | |
| 110 | static inline struct task_struct *get_proc_task(struct inode *inode) |
| 111 | { |
| 112 | return get_pid_task(proc_pid(inode), PIDTYPE_PID); |
| 113 | } |
| 114 | |
| 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); |
| 125 | if (dumpable == SUID_DUMP_USER) |
| 126 | return 1; |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 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 | |
| 152 | /* |
| 153 | * base.c |
| 154 | */ |
| 155 | extern int pid_delete_dentry(const struct dentry *); |
| 156 | |
| 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); |
| 161 | |
| 162 | struct pde_opener { |
| 163 | struct file *file; |
| 164 | struct list_head lh; |
| 165 | int closing; |
| 166 | struct completion *c; |
| 167 | }; |
| 168 | |
| 169 | void proc_entry_rundown(struct proc_dir_entry *); |
| 170 | |
| 171 | extern spinlock_t proc_subdir_lock; |
| 172 | |
| 173 | struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int); |
| 174 | int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); |
| 175 | unsigned long task_vsize(struct mm_struct *); |
| 176 | unsigned long task_statm(struct mm_struct *, |
| 177 | unsigned long *, unsigned long *, unsigned long *, unsigned long *); |
| 178 | void task_mem(struct seq_file *, struct mm_struct *); |
| 179 | |
| 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); |
| 186 | |
| 187 | int proc_fill_super(struct super_block *); |
| 188 | struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); |
| 189 | int proc_remount(struct super_block *sb, int *flags, char *data); |
| 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); |
| 199 | struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int); |
| 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); |
| 209 | int pid_revalidate(struct dentry *dentry, unsigned int flags); |
| 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 | |
| 218 | extern int proc_setup_self(struct super_block *); |
| 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 |