[deliverable/linux.git] / fs / proc / internal.h

/* 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/sched.h>
#include <linux/proc_fs.h>
struct  ctl_table_header;

extern struct proc_dir_entry proc_root;
#ifdef CONFIG_PROC_SYSCTL
extern int proc_sys_init(void);
extern void sysctl_head_put(struct ctl_table_header *head);
#else
static inline void proc_sys_init(void) { }
static inline void sysctl_head_put(struct ctl_table_header *head) { }
#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;
};

#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_tid_children_operations;
extern const struct file_operations proc_pid_maps_operations;
extern const struct file_operations proc_tid_maps_operations;
extern const struct file_operations proc_pid_numa_maps_operations;
extern const struct file_operations proc_tid_numa_maps_operations;
extern const struct file_operations proc_pid_smaps_operations;
extern const struct file_operations proc_tid_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;
extern const struct inode_operations proc_pid_link_inode_operations;

struct proc_maps_private {
	struct pid *pid;
	struct task_struct *task;
#ifdef CONFIG_MMU
	struct vm_area_struct *tail_vma;
#endif
};

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;
}

static inline int task_dumpable(struct task_struct *task)
{
	int dumpable = 0;
	struct mm_struct *mm;

	task_lock(task);
	mm = task->mm;
	if (mm)
		dumpable = get_dumpable(mm);
	task_unlock(task);
	if (dumpable == SUID_DUMPABLE_ENABLED)
		return 1;
	return 0;
}

static inline int pid_delete_dentry(const struct dentry * dentry)
{
	/* Is the task we represent dead?
	 * If so, then don't put the dentry on the lru list,
	 * kill it immediately.
	 */
	return !proc_pid(dentry->d_inode)->tasks[PIDTYPE_PID].first;
}

static inline unsigned name_to_int(struct dentry *dentry)
{
	const char *name = dentry->d_name.name;
	int len = dentry->d_name.len;
	unsigned n = 0;

	if (len > 1 && *name == '0')
		goto out;
	while (len-- > 0) {
		unsigned c = *name++ - '0';
		if (c > 9)
			goto out;
		if (n >= (~0U-9)/10)
			goto out;
		n *= 10;
		n += c;
	}
	return n;
out:
	return ~0U;
}

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);

extern spinlock_t proc_subdir_lock;

struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int);
int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
unsigned long task_vsize(struct mm_struct *);
unsigned long task_statm(struct mm_struct *,
	unsigned long *, unsigned long *, unsigned long *, unsigned long *);
void task_mem(struct seq_file *, struct mm_struct *);

static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
{
	atomic_inc(&pde->count);
	return pde;
}
void pde_put(struct proc_dir_entry *pde);

int proc_fill_super(struct super_block *);
struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
int proc_remount(struct super_block *sb, int *flags, char *data);

/*
 * These are generic /proc routines that use the internal
 * "struct proc_dir_entry" tree to traverse the filesystem.
 *
 * The /proc root directory has extended versions to take care
 * of the /proc/<pid> subdirectories.
 */
int proc_readdir(struct file *, void *, filldir_t);
struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);


/* Lookups */
typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
				struct task_struct *, const void *);
int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
	const char *name, int len,
	instantiate_t instantiate, struct task_struct *task, const void *ptr);
int pid_revalidate(struct dentry *dentry, unsigned int flags);
struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
extern const struct dentry_operations pid_dentry_operations;
int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
int proc_setattr(struct dentry *dentry, struct iattr *attr);

extern const struct inode_operations proc_ns_dir_inode_operations;
extern const struct file_operations proc_ns_dir_operations;
Commit	Line	Data
1da177e4 LT	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
faf60af1	12	#include <linux/sched.h>
1da177e4	13	#include <linux/proc_fs.h>
1f87f0b5	14	struct ctl_table_header;
1da177e4	15
c74c120a	16	extern struct proc_dir_entry proc_root;
05565b65	17	#ifdef CONFIG_PROC_SYSCTL
77b14db5	18	extern int proc_sys_init(void);
1f87f0b5	19	extern void sysctl_head_put(struct ctl_table_header *head);
05565b65 AM	20	#else
05565b65 AM	21	static inline void proc_sys_init(void) { }
1f87f0b5	22	static inline void sysctl_head_put(struct ctl_table_header *head) { }
05565b65	23	#endif
457c4cbc EB	24	#ifdef CONFIG_NET
	25	extern int proc_net_init(void);
	26	#else
	27	static inline int proc_net_init(void) { return 0; }
	28	#endif
77b14db5	29
1da177e4 LT	30	struct vmalloc_info {
	31	unsigned long used;
	32	unsigned long largest_chunk;
	33	};
	34
	35	#ifdef CONFIG_MMU
	36	#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
	37	extern void get_vmalloc_info(struct vmalloc_info *vmi);
	38	#else
	39
	40	#define VMALLOC_TOTAL 0UL
	41	#define get_vmalloc_info(vmi) \
	42	do { \
	43	(vmi)->used = 0; \
	44	(vmi)->largest_chunk = 0; \
	45	} while(0)
1da177e4 LT	46	#endif
1da177e4 LT	47
ee992744 EB	48	extern int proc_tid_stat(struct seq_file m, struct pid_namespace ns,
	49	struct pid pid, struct task_struct task);
	50	extern int proc_tgid_stat(struct seq_file m, struct pid_namespace ns,
	51	struct pid pid, struct task_struct task);
df5f8314 EB	52	extern int proc_pid_status(struct seq_file m, struct pid_namespace ns,
df5f8314 EB	53	struct pid pid, struct task_struct task);
a56d3fc7 EB	54	extern int proc_pid_statm(struct seq_file m, struct pid_namespace ns,
a56d3fc7 EB	55	struct pid pid, struct task_struct task);
85863e47	56	extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
1da177e4	57
81841161	58	extern const struct file_operations proc_tid_children_operations;
b7643757 SP	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;
f248dcb3	65	extern const struct file_operations proc_clear_refs_operations;
85863e47	66	extern const struct file_operations proc_pagemap_operations;
e9720acd PE	67	extern const struct file_operations proc_net_operations;
e9720acd PE	68	extern const struct inode_operations proc_net_inode_operations;
faf60af1	69	extern const struct inode_operations proc_pid_link_inode_operations;
99f89551	70
f2beb798 SW	71	struct proc_maps_private {
	72	struct pid *pid;
	73	struct task_struct *task;
	74	#ifdef CONFIG_MMU
	75	struct vm_area_struct *tail_vma;
	76	#endif
	77	};
	78
5bcd7ff9	79	void proc_init_inodecache(void);
fee781e6	80
13b41b09	81	static inline struct pid proc_pid(struct inode inode)
99f89551	82	{
13b41b09	83	return PROC_I(inode)->pid;
99f89551 EB	84	}
	85
	86	static inline struct task_struct get_proc_task(struct inode inode)
1da177e4	87	{
13b41b09	88	return get_pid_task(proc_pid(inode), PIDTYPE_PID);
1da177e4 LT	89	}
1da177e4 LT	90
aed7a6c4	91	static inline int proc_fd(struct inode *inode)
1da177e4	92	{
aed7a6c4	93	return PROC_I(inode)->fd;
1da177e4	94	}
e9720acd	95
faf60af1 CG	96	static inline int task_dumpable(struct task_struct *task)
	97	{
	98	int dumpable = 0;
	99	struct mm_struct *mm;
	100
	101	task_lock(task);
	102	mm = task->mm;
	103	if (mm)
	104	dumpable = get_dumpable(mm);
	105	task_unlock(task);
0f4cfb2e	106	if (dumpable == SUID_DUMPABLE_ENABLED)
faf60af1 CG	107	return 1;
	108	return 0;
	109	}
	110
	111	static inline int pid_delete_dentry(const struct dentry * dentry)
	112	{
	113	/* Is the task we represent dead?
	114	* If so, then don't put the dentry on the lru list,
	115	* kill it immediately.
	116	*/
	117	return !proc_pid(dentry->d_inode)->tasks[PIDTYPE_PID].first;
	118	}
	119
	120	static inline unsigned name_to_int(struct dentry *dentry)
	121	{
	122	const char *name = dentry->d_name.name;
	123	int len = dentry->d_name.len;
	124	unsigned n = 0;
	125
	126	if (len > 1 && *name == '0')
	127	goto out;
	128	while (len-- > 0) {
	129	unsigned c = *name++ - '0';
	130	if (c > 9)
	131	goto out;
	132	if (n >= (~0U-9)/10)
	133	goto out;
	134	n *= 10;
	135	n += c;
	136	}
	137	return n;
	138	out:
	139	return ~0U;
	140	}
	141
e9720acd PE	142	struct dentry proc_lookup_de(struct proc_dir_entry de, struct inode *ino,
	143	struct dentry *dentry);
	144	int proc_readdir_de(struct proc_dir_entry de, struct file filp, void *dirent,
	145	filldir_t filldir);
881adb85 AD	146
	147	struct pde_opener {
	148	struct inode *inode;
	149	struct file *file;
	150	int (release)(struct inode , struct file *);
	151	struct list_head lh;
	152	};
3dec7f59	153	void pde_users_dec(struct proc_dir_entry *pde);
3174c21b AV	154
	155	extern spinlock_t proc_subdir_lock;
	156
00cd8dd3	157	struct dentry proc_pid_lookup(struct inode dir, struct dentry * dentry, unsigned int);
3174c21b AV	158	int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
3174c21b AV	159	unsigned long task_vsize(struct mm_struct *);
a2ade7b6 AD	160	unsigned long task_statm(struct mm_struct *,
a2ade7b6 AD	161	unsigned long , unsigned long , unsigned long , unsigned long );
3174c21b AV	162	void task_mem(struct seq_file , struct mm_struct );
3174c21b AV	163
135d5655 AD	164	static inline struct proc_dir_entry pde_get(struct proc_dir_entry pde)
	165	{
	166	atomic_inc(&pde->count);
	167	return pde;
	168	}
	169	void pde_put(struct proc_dir_entry *pde);
3174c21b	170
3174c21b	171	int proc_fill_super(struct super_block *);
6d1b6e4e	172	struct inode proc_get_inode(struct super_block , struct proc_dir_entry *);
97412950	173	int proc_remount(struct super_block sb, int flags, char *data);
3174c21b AV	174
	175	/*
	176	* These are generic /proc routines that use the internal
	177	* "struct proc_dir_entry" tree to traverse the filesystem.
	178	*
	179	* The /proc root directory has extended versions to take care
	180	* of the /proc/<pid> subdirectories.
	181	*/
	182	int proc_readdir(struct file , void , filldir_t);
00cd8dd3	183	struct dentry proc_lookup(struct inode , struct dentry *, unsigned int);
6b4e306a EB	184
	185
	186
	187	/* Lookups */
	188	typedef struct dentry instantiate_t(struct inode , struct dentry *,
	189	struct task_struct , const void );
	190	int proc_fill_cache(struct file filp, void dirent, filldir_t filldir,
	191	const char *name, int len,
	192	instantiate_t instantiate, struct task_struct task, const void ptr);
0b728e19	193	int pid_revalidate(struct dentry *dentry, unsigned int flags);
6b4e306a EB	194	struct inode proc_pid_make_inode(struct super_block sb, struct task_struct *task);
	195	extern const struct dentry_operations pid_dentry_operations;
	196	int pid_getattr(struct vfsmount mnt, struct dentry dentry, struct kstat *stat);
	197	int proc_setattr(struct dentry dentry, struct iattr attr);
	198
	199	extern const struct inode_operations proc_ns_dir_inode_operations;
	200	extern const struct file_operations proc_ns_dir_operations;
	201