2005-04-17 06:20:36 +08:00
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/* internal.h: internal procfs definitions
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/proc_fs.h>
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2008-04-29 16:01:44 +08:00
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extern struct proc_dir_entry proc_root;
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2007-04-02 14:49:35 +08:00
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#ifdef CONFIG_PROC_SYSCTL
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2007-02-14 16:34:12 +08:00
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extern int proc_sys_init(void);
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2007-04-02 14:49:35 +08:00
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#else
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static inline void proc_sys_init(void) { }
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#endif
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2007-09-12 18:01:34 +08:00
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#ifdef CONFIG_NET
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extern int proc_net_init(void);
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#else
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static inline int proc_net_init(void) { return 0; }
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#endif
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2007-02-14 16:34:12 +08:00
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2005-04-17 06:20:36 +08:00
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struct vmalloc_info {
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unsigned long used;
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unsigned long largest_chunk;
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};
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2008-01-02 22:09:57 +08:00
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extern struct mm_struct *mm_for_maps(struct task_struct *);
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2005-04-17 06:20:36 +08:00
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#ifdef CONFIG_MMU
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#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
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extern void get_vmalloc_info(struct vmalloc_info *vmi);
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#else
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#define VMALLOC_TOTAL 0UL
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#define get_vmalloc_info(vmi) \
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do { \
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(vmi)->used = 0; \
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(vmi)->largest_chunk = 0; \
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} while(0)
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#endif
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2008-02-08 20:18:31 +08:00
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extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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2008-02-08 20:18:33 +08:00
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extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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2008-02-08 20:18:32 +08:00
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extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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2008-02-05 14:29:04 +08:00
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extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
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2005-04-17 06:20:36 +08:00
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2007-02-12 16:55:34 +08:00
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extern const struct file_operations proc_maps_operations;
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extern const struct file_operations proc_numa_maps_operations;
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extern const struct file_operations proc_smaps_operations;
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2008-02-05 14:29:03 +08:00
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extern const struct file_operations proc_clear_refs_operations;
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2008-02-05 14:29:04 +08:00
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extern const struct file_operations proc_pagemap_operations;
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[NET]: Make /proc/net a symlink on /proc/self/net (v3)
Current /proc/net is done with so called "shadows", but current
implementation is broken and has little chances to get fixed.
The problem is that dentries subtree of /proc/net directory has
fancy revalidation rules to make processes living in different
net namespaces see different entries in /proc/net subtree, but
currently, tasks see in the /proc/net subdir the contents of any
other namespace, depending on who opened the file first.
The proposed fix is to turn /proc/net into a symlink, which points
to /proc/self/net, which in turn shows what previously was in
/proc/net - the network-related info, from the net namespace the
appropriate task lives in.
# ls -l /proc/net
lrwxrwxrwx 1 root root 8 Mar 5 15:17 /proc/net -> self/net
In other words - this behaves like /proc/mounts, but unlike
"mounts", "net" is not a file, but a directory.
Changes from v2:
* Fixed discrepancy of /proc/net nlink count and selinux labeling
screwup pointed out by Stephen.
To get the correct nlink count the ->getattr callback for /proc/net
is overridden to read one from the net->proc_net entry.
To make selinux still work the net->proc_net entry is initialized
properly, i.e. with the "net" name and the proc_net parent.
Selinux fixes are
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Changes from v1:
* Fixed a task_struct leak in get_proc_task_net, pointed out by Paul.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-08 03:08:40 +08:00
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extern const struct file_operations proc_net_operations;
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extern const struct inode_operations proc_net_inode_operations;
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2006-06-26 15:25:55 +08:00
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2006-01-08 17:04:16 +08:00
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void free_proc_entry(struct proc_dir_entry *de);
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2008-10-17 07:43:55 +08:00
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void proc_init_inodecache(void);
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2006-01-08 17:04:16 +08:00
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2006-06-26 15:25:56 +08:00
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static inline struct pid *proc_pid(struct inode *inode)
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2006-06-26 15:25:55 +08:00
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{
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2006-06-26 15:25:56 +08:00
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return PROC_I(inode)->pid;
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2006-06-26 15:25:55 +08:00
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}
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static inline struct task_struct *get_proc_task(struct inode *inode)
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2005-04-17 06:20:36 +08:00
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{
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2006-06-26 15:25:56 +08:00
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return get_pid_task(proc_pid(inode), PIDTYPE_PID);
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2005-04-17 06:20:36 +08:00
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}
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2006-06-26 15:25:44 +08:00
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static inline int proc_fd(struct inode *inode)
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2005-04-17 06:20:36 +08:00
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{
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2006-06-26 15:25:44 +08:00
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return PROC_I(inode)->fd;
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2005-04-17 06:20:36 +08:00
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}
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[NET]: Make /proc/net a symlink on /proc/self/net (v3)
Current /proc/net is done with so called "shadows", but current
implementation is broken and has little chances to get fixed.
The problem is that dentries subtree of /proc/net directory has
fancy revalidation rules to make processes living in different
net namespaces see different entries in /proc/net subtree, but
currently, tasks see in the /proc/net subdir the contents of any
other namespace, depending on who opened the file first.
The proposed fix is to turn /proc/net into a symlink, which points
to /proc/self/net, which in turn shows what previously was in
/proc/net - the network-related info, from the net namespace the
appropriate task lives in.
# ls -l /proc/net
lrwxrwxrwx 1 root root 8 Mar 5 15:17 /proc/net -> self/net
In other words - this behaves like /proc/mounts, but unlike
"mounts", "net" is not a file, but a directory.
Changes from v2:
* Fixed discrepancy of /proc/net nlink count and selinux labeling
screwup pointed out by Stephen.
To get the correct nlink count the ->getattr callback for /proc/net
is overridden to read one from the net->proc_net entry.
To make selinux still work the net->proc_net entry is initialized
properly, i.e. with the "net" name and the proc_net parent.
Selinux fixes are
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Changes from v1:
* Fixed a task_struct leak in get_proc_task_net, pointed out by Paul.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-08 03:08:40 +08:00
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struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
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struct dentry *dentry);
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int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
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filldir_t filldir);
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2008-07-25 16:48:29 +08:00
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struct pde_opener {
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struct inode *inode;
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struct file *file;
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int (*release)(struct inode *, struct file *);
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struct list_head lh;
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};
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2009-02-20 22:04:33 +08:00
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void pde_users_dec(struct proc_dir_entry *pde);
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2009-04-08 01:19:18 +08:00
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extern spinlock_t proc_subdir_lock;
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struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
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int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
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unsigned long task_vsize(struct mm_struct *);
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int task_statm(struct mm_struct *, int *, int *, int *, int *);
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void task_mem(struct seq_file *, struct mm_struct *);
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struct proc_dir_entry *de_get(struct proc_dir_entry *de);
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void de_put(struct proc_dir_entry *de);
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extern struct vfsmount *proc_mnt;
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int proc_fill_super(struct super_block *);
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struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
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/*
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* These are generic /proc routines that use the internal
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* "struct proc_dir_entry" tree to traverse the filesystem.
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*
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* The /proc root directory has extended versions to take care
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* of the /proc/<pid> subdirectories.
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*/
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int proc_readdir(struct file *, void *, filldir_t);
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struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
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