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 proc_sys_init(void)20 static inline void proc_sys_init(void) { } sysctl_head_put(struct ctl_table_header * head)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 proc_net_init(void)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 extern struct mm_struct *mm_for_maps(struct task_struct *); 35 36 #ifdef CONFIG_MMU 37 #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START) 38 extern void get_vmalloc_info(struct vmalloc_info *vmi); 39 #else 40 41 #define VMALLOC_TOTAL 0UL 42 #define get_vmalloc_info(vmi) \ 43 do { \ 44 (vmi)->used = 0; \ 45 (vmi)->largest_chunk = 0; \ 46 } while(0) 47 #endif 48 49 extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, 50 struct pid *pid, struct task_struct *task); 51 extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, 52 struct pid *pid, struct task_struct *task); 53 extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, 54 struct pid *pid, struct task_struct *task); 55 extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, 56 struct pid *pid, struct task_struct *task); 57 extern loff_t mem_lseek(struct file *file, loff_t offset, int orig); 58 59 extern const struct file_operations proc_pid_maps_operations; 60 extern const struct file_operations proc_tid_maps_operations; 61 extern const struct file_operations proc_pid_numa_maps_operations; 62 extern const struct file_operations proc_tid_numa_maps_operations; 63 extern const struct file_operations proc_pid_smaps_operations; 64 extern const struct file_operations proc_tid_smaps_operations; 65 extern const struct file_operations proc_clear_refs_operations; 66 extern const struct file_operations proc_pagemap_operations; 67 extern const struct file_operations proc_net_operations; 68 extern const struct inode_operations proc_net_inode_operations; 69 70 struct proc_maps_private { 71 struct pid *pid; 72 struct task_struct *task; 73 #ifdef CONFIG_MMU 74 struct vm_area_struct *tail_vma; 75 #endif 76 }; 77 78 void proc_init_inodecache(void); 79 proc_pid(struct inode * inode)80 static inline struct pid *proc_pid(struct inode *inode) 81 { 82 return PROC_I(inode)->pid; 83 } 84 get_proc_task(struct inode * inode)85 static inline struct task_struct *get_proc_task(struct inode *inode) 86 { 87 return get_pid_task(proc_pid(inode), PIDTYPE_PID); 88 } 89 proc_fd(struct inode * inode)90 static inline int proc_fd(struct inode *inode) 91 { 92 return PROC_I(inode)->fd; 93 } 94 95 struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino, 96 struct dentry *dentry); 97 int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent, 98 filldir_t filldir); 99 100 struct pde_opener { 101 struct inode *inode; 102 struct file *file; 103 int (*release)(struct inode *, struct file *); 104 struct list_head lh; 105 }; 106 void pde_users_dec(struct proc_dir_entry *pde); 107 108 extern spinlock_t proc_subdir_lock; 109 110 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); 111 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); 112 unsigned long task_vsize(struct mm_struct *); 113 unsigned long task_statm(struct mm_struct *, 114 unsigned long *, unsigned long *, unsigned long *, unsigned long *); 115 void task_mem(struct seq_file *, struct mm_struct *); 116 pde_get(struct proc_dir_entry * pde)117 static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) 118 { 119 atomic_inc(&pde->count); 120 return pde; 121 } 122 void pde_put(struct proc_dir_entry *pde); 123 124 int proc_fill_super(struct super_block *); 125 struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); 126 int proc_remount(struct super_block *sb, int *flags, char *data); 127 128 /* 129 * These are generic /proc routines that use the internal 130 * "struct proc_dir_entry" tree to traverse the filesystem. 131 * 132 * The /proc root directory has extended versions to take care 133 * of the /proc/<pid> subdirectories. 134 */ 135 int proc_readdir(struct file *, void *, filldir_t); 136 struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *); 137 138 139 140 /* Lookups */ 141 typedef struct dentry *instantiate_t(struct inode *, struct dentry *, 142 struct task_struct *, const void *); 143 int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir, 144 const char *name, int len, 145 instantiate_t instantiate, struct task_struct *task, const void *ptr); 146 int pid_revalidate(struct dentry *dentry, struct nameidata *nd); 147 struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task); 148 extern const struct dentry_operations pid_dentry_operations; 149 int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); 150 int proc_setattr(struct dentry *dentry, struct iattr *attr); 151 152 extern const struct inode_operations proc_ns_dir_inode_operations; 153 extern const struct file_operations proc_ns_dir_operations; 154 155