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/proc_fs.h> 13 struct ctl_table_header; 14 15 extern struct proc_dir_entry proc_root; 16 #ifdef CONFIG_PROC_SYSCTL 17 extern int proc_sys_init(void); 18 extern void sysctl_head_put(struct ctl_table_header *head); 19 #else 20 static inline void proc_sys_init(void) { } 21 static inline void sysctl_head_put(struct ctl_table_header *head) { } 22 #endif 23 #ifdef CONFIG_NET 24 extern int proc_net_init(void); 25 #else 26 static inline int proc_net_init(void) { return 0; } 27 #endif 28 29 struct vmalloc_info { 30 unsigned long used; 31 unsigned long largest_chunk; 32 }; 33 34 #ifdef CONFIG_MMU 35 #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START) 36 extern void get_vmalloc_info(struct vmalloc_info *vmi); 37 #else 38 39 #define VMALLOC_TOTAL 0UL 40 #define get_vmalloc_info(vmi) \ 41 do { \ 42 (vmi)->used = 0; \ 43 (vmi)->largest_chunk = 0; \ 44 } while(0) 45 #endif 46 47 extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, 48 struct pid *pid, struct task_struct *task); 49 extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, 50 struct pid *pid, struct task_struct *task); 51 extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, 52 struct pid *pid, struct task_struct *task); 53 extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, 54 struct pid *pid, struct task_struct *task); 55 extern loff_t mem_lseek(struct file *file, loff_t offset, int orig); 56 57 extern const struct file_operations proc_pid_maps_operations; 58 extern const struct file_operations proc_tid_maps_operations; 59 extern const struct file_operations proc_pid_numa_maps_operations; 60 extern const struct file_operations proc_tid_numa_maps_operations; 61 extern const struct file_operations proc_pid_smaps_operations; 62 extern const struct file_operations proc_tid_smaps_operations; 63 extern const struct file_operations proc_clear_refs_operations; 64 extern const struct file_operations proc_pagemap_operations; 65 extern const struct file_operations proc_net_operations; 66 extern const struct inode_operations proc_net_inode_operations; 67 68 struct proc_maps_private { 69 struct pid *pid; 70 struct task_struct *task; 71 #ifdef CONFIG_MMU 72 struct vm_area_struct *tail_vma; 73 #endif 74 }; 75 76 void proc_init_inodecache(void); 77 78 static inline struct pid *proc_pid(struct inode *inode) 79 { 80 return PROC_I(inode)->pid; 81 } 82 83 static inline struct task_struct *get_proc_task(struct inode *inode) 84 { 85 return get_pid_task(proc_pid(inode), PIDTYPE_PID); 86 } 87 88 static inline int proc_fd(struct inode *inode) 89 { 90 return PROC_I(inode)->fd; 91 } 92 93 struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino, 94 struct dentry *dentry); 95 int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent, 96 filldir_t filldir); 97 98 struct pde_opener { 99 struct inode *inode; 100 struct file *file; 101 int (*release)(struct inode *, struct file *); 102 struct list_head lh; 103 }; 104 void pde_users_dec(struct proc_dir_entry *pde); 105 106 extern spinlock_t proc_subdir_lock; 107 108 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 109 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 110 unsigned long task_vsize(struct mm_struct *); 111 unsigned long task_statm(struct mm_struct *, 112 unsigned long *, unsigned long *, unsigned long *, unsigned long *); 113 void task_mem(struct seq_file *, struct mm_struct *); 114 115 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) 116 { 117 atomic_inc(&pde->count); 118 return pde; 119 } 120 void pde_put(struct proc_dir_entry *pde); 121 122 int proc_fill_super(struct super_block *); 123 struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); 124 int proc_remount(struct super_block *sb, int *flags, char *data); 125 126 /* 127 * These are generic /proc routines that use the internal 128 * "struct proc_dir_entry" tree to traverse the filesystem. 129 * 130 * The /proc root directory has extended versions to take care 131 * of the /proc/<pid> subdirectories. 132 */ 133 int proc_readdir(struct file *, void *, filldir_t); 134 struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); 135 136 137 138 /* Lookups */ 139 typedef struct dentry *instantiate_t(struct inode *, struct dentry *, 140 struct task_struct *, const void *); 141 int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir, 142 const char *name, int len, 143 instantiate_t instantiate, struct task_struct *task, const void *ptr); 144 int pid_revalidate(struct dentry *dentry, struct nameidata *nd); 145 struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task); 146 extern const struct dentry_operations pid_dentry_operations; 147 int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); 148 int proc_setattr(struct dentry *dentry, struct iattr *attr); 149 150 extern const struct inode_operations proc_ns_dir_inode_operations; 151 extern const struct file_operations proc_ns_dir_operations; 152 153