mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 13:11:45 +00:00
3dec7f59c3
struct proc_dir_entry::owner is going to be removed. Now it's only necessary to protect PDEs which are using ->read_proc, ->write_proc hooks. However, ->owner assignments are racy and make it very easy for someone to switch ->owner on live PDE (as some subsystems do) without fixing refcounts and so on. http://bugzilla.kernel.org/show_bug.cgi?id=12454 So, ->owner is on death row. Proxy file operations exist already (proc_file_operations), just bump usecount when necessary. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/* internal.h: internal procfs definitions
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/proc_fs.h>
|
|
|
|
extern struct proc_dir_entry proc_root;
|
|
#ifdef CONFIG_PROC_SYSCTL
|
|
extern int proc_sys_init(void);
|
|
#else
|
|
static inline void proc_sys_init(void) { }
|
|
#endif
|
|
#ifdef CONFIG_NET
|
|
extern int proc_net_init(void);
|
|
#else
|
|
static inline int proc_net_init(void) { return 0; }
|
|
#endif
|
|
|
|
struct vmalloc_info {
|
|
unsigned long used;
|
|
unsigned long largest_chunk;
|
|
};
|
|
|
|
extern struct mm_struct *mm_for_maps(struct task_struct *);
|
|
|
|
#ifdef CONFIG_MMU
|
|
#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
|
|
extern void get_vmalloc_info(struct vmalloc_info *vmi);
|
|
#else
|
|
|
|
#define VMALLOC_TOTAL 0UL
|
|
#define get_vmalloc_info(vmi) \
|
|
do { \
|
|
(vmi)->used = 0; \
|
|
(vmi)->largest_chunk = 0; \
|
|
} while(0)
|
|
#endif
|
|
|
|
extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
|
|
struct pid *pid, struct task_struct *task);
|
|
extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
|
|
struct pid *pid, struct task_struct *task);
|
|
extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
|
|
struct pid *pid, struct task_struct *task);
|
|
extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
|
|
struct pid *pid, struct task_struct *task);
|
|
extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
|
|
|
|
extern const struct file_operations proc_maps_operations;
|
|
extern const struct file_operations proc_numa_maps_operations;
|
|
extern const struct file_operations proc_smaps_operations;
|
|
extern const struct file_operations proc_clear_refs_operations;
|
|
extern const struct file_operations proc_pagemap_operations;
|
|
extern const struct file_operations proc_net_operations;
|
|
extern const struct inode_operations proc_net_inode_operations;
|
|
|
|
void free_proc_entry(struct proc_dir_entry *de);
|
|
|
|
void proc_init_inodecache(void);
|
|
|
|
static inline struct pid *proc_pid(struct inode *inode)
|
|
{
|
|
return PROC_I(inode)->pid;
|
|
}
|
|
|
|
static inline struct task_struct *get_proc_task(struct inode *inode)
|
|
{
|
|
return get_pid_task(proc_pid(inode), PIDTYPE_PID);
|
|
}
|
|
|
|
static inline int proc_fd(struct inode *inode)
|
|
{
|
|
return PROC_I(inode)->fd;
|
|
}
|
|
|
|
struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
|
|
struct dentry *dentry);
|
|
int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
|
|
filldir_t filldir);
|
|
|
|
struct pde_opener {
|
|
struct inode *inode;
|
|
struct file *file;
|
|
int (*release)(struct inode *, struct file *);
|
|
struct list_head lh;
|
|
};
|
|
void pde_users_dec(struct proc_dir_entry *pde);
|