[linux.git] / security / keys / proc.c

/* proc.c: proc files for key database enumeration
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/errno.h>
#include "internal.h"

#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
static int proc_keys_open(struct inode *inode, struct file *file);
static void *proc_keys_start(struct seq_file *p, loff_t *_pos);
static void *proc_keys_next(struct seq_file *p, void *v, loff_t *_pos);
static void proc_keys_stop(struct seq_file *p, void *v);
static int proc_keys_show(struct seq_file *m, void *v);

static struct seq_operations proc_keys_ops = {
	.start	= proc_keys_start,
	.next	= proc_keys_next,
	.stop	= proc_keys_stop,
	.show	= proc_keys_show,
};

static struct file_operations proc_keys_fops = {
	.open		= proc_keys_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};
#endif

static int proc_key_users_open(struct inode *inode, struct file *file);
static void *proc_key_users_start(struct seq_file *p, loff_t *_pos);
static void *proc_key_users_next(struct seq_file *p, void *v, loff_t *_pos);
static void proc_key_users_stop(struct seq_file *p, void *v);
static int proc_key_users_show(struct seq_file *m, void *v);

static struct seq_operations proc_key_users_ops = {
	.start	= proc_key_users_start,
	.next	= proc_key_users_next,
	.stop	= proc_key_users_stop,
	.show	= proc_key_users_show,
};

static struct file_operations proc_key_users_fops = {
	.open		= proc_key_users_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

/*****************************************************************************/
/*
 * declare the /proc files
 */
static int __init key_proc_init(void)
{
	struct proc_dir_entry *p;

#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
	p = create_proc_entry("keys", 0, NULL);
	if (!p)
		panic("Cannot create /proc/keys\n");

	p->proc_fops = &proc_keys_fops;
#endif

	p = create_proc_entry("key-users", 0, NULL);
	if (!p)
		panic("Cannot create /proc/key-users\n");

	p->proc_fops = &proc_key_users_fops;

	return 0;

} /* end key_proc_init() */

__initcall(key_proc_init);

/*****************************************************************************/
/*
 * implement "/proc/keys" to provides a list of the keys on the system
 */
#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS

static int proc_keys_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &proc_keys_ops);

}

static void *proc_keys_start(struct seq_file *p, loff_t *_pos)
{
	struct rb_node *_p;
	loff_t pos = *_pos;

	spin_lock(&key_serial_lock);

	_p = rb_first(&key_serial_tree);
	while (pos > 0 && _p) {
		pos--;
		_p = rb_next(_p);
	}

	return _p;

}

static void *proc_keys_next(struct seq_file *p, void *v, loff_t *_pos)
{
	(*_pos)++;
	return rb_next((struct rb_node *) v);

}

static void proc_keys_stop(struct seq_file *p, void *v)
{
	spin_unlock(&key_serial_lock);
}

static int proc_keys_show(struct seq_file *m, void *v)
{
	struct rb_node *_p = v;
	struct key *key = rb_entry(_p, struct key, serial_node);
	struct timespec now;
	unsigned long timo;
	char xbuf[12];

	now = current_kernel_time();

	rcu_read_lock();

	/* come up with a suitable timeout value */
	if (key->expiry == 0) {
		memcpy(xbuf, "perm", 5);
	}
	else if (now.tv_sec >= key->expiry) {
		memcpy(xbuf, "expd", 5);
	}
	else {
		timo = key->expiry - now.tv_sec;

		if (timo < 60)
			sprintf(xbuf, "%lus", timo);
		else if (timo < 60*60)
			sprintf(xbuf, "%lum", timo / 60);
		else if (timo < 60*60*24)
			sprintf(xbuf, "%luh", timo / (60*60));
		else if (timo < 60*60*24*7)
			sprintf(xbuf, "%lud", timo / (60*60*24));
		else
			sprintf(xbuf, "%luw", timo / (60*60*24*7));
	}

#define showflag(KEY, LETTER, FLAG) \
	(test_bit(FLAG,	&(KEY)->flags) ? LETTER : '-')

	seq_printf(m, "%08x %c%c%c%c%c%c %5d %4s %06x %5d %5d %-9.9s ",
		   key->serial,
		   showflag(key, 'I', KEY_FLAG_INSTANTIATED),
		   showflag(key, 'R', KEY_FLAG_REVOKED),
		   showflag(key, 'D', KEY_FLAG_DEAD),
		   showflag(key, 'Q', KEY_FLAG_IN_QUOTA),
		   showflag(key, 'U', KEY_FLAG_USER_CONSTRUCT),
		   showflag(key, 'N', KEY_FLAG_NEGATIVE),
		   atomic_read(&key->usage),
		   xbuf,
		   key->perm,
		   key->uid,
		   key->gid,
		   key->type->name);

#undef showflag

	if (key->type->describe)
		key->type->describe(key, m);
	seq_putc(m, '\n');

	rcu_read_unlock();

	return 0;

}

#endif /* CONFIG_KEYS_DEBUG_PROC_KEYS */

/*****************************************************************************/
/*
 * implement "/proc/key-users" to provides a list of the key users
 */
static int proc_key_users_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &proc_key_users_ops);

}

static void *proc_key_users_start(struct seq_file *p, loff_t *_pos)
{
	struct rb_node *_p;
	loff_t pos = *_pos;

	spin_lock(&key_user_lock);

	_p = rb_first(&key_user_tree);
	while (pos > 0 && _p) {
		pos--;
		_p = rb_next(_p);
	}

	return _p;

}

static void *proc_key_users_next(struct seq_file *p, void *v, loff_t *_pos)
{
	(*_pos)++;
	return rb_next((struct rb_node *) v);

}

static void proc_key_users_stop(struct seq_file *p, void *v)
{
	spin_unlock(&key_user_lock);
}

static int proc_key_users_show(struct seq_file *m, void *v)
{
	struct rb_node *_p = v;
	struct key_user *user = rb_entry(_p, struct key_user, node);

	seq_printf(m, "%5u: %5d %d/%d %d/%d %d/%d\n",
		   user->uid,
		   atomic_read(&user->usage),
		   atomic_read(&user->nkeys),
		   atomic_read(&user->nikeys),
		   user->qnkeys,
		   KEYQUOTA_MAX_KEYS,
		   user->qnbytes,
		   KEYQUOTA_MAX_BYTES
		   );

	return 0;

}
Commit	Line	Data
1da177e4 LT	1	/* proc.c: proc files for key database enumeration
	2	*
	3	* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells ([email protected])
	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/module.h>
	13	#include <linux/init.h>
	14	#include <linux/sched.h>
	15	#include <linux/slab.h>
	16	#include <linux/fs.h>
	17	#include <linux/proc_fs.h>
	18	#include <linux/seq_file.h>
	19	#include <asm/errno.h>
	20	#include "internal.h"
	21
	22	#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
	23	static int proc_keys_open(struct inode inode, struct file file);
	24	static void proc_keys_start(struct seq_file p, loff_t *_pos);
	25	static void proc_keys_next(struct seq_file p, void v, loff_t _pos);
	26	static void proc_keys_stop(struct seq_file p, void v);
	27	static int proc_keys_show(struct seq_file m, void v);
	28
	29	static struct seq_operations proc_keys_ops = {
	30	.start = proc_keys_start,
	31	.next = proc_keys_next,
	32	.stop = proc_keys_stop,
	33	.show = proc_keys_show,
	34	};
	35
	36	static struct file_operations proc_keys_fops = {
	37	.open = proc_keys_open,
	38	.read = seq_read,
	39	.llseek = seq_lseek,
	40	.release = seq_release,
	41	};
	42	#endif
	43
	44	static int proc_key_users_open(struct inode inode, struct file file);
	45	static void proc_key_users_start(struct seq_file p, loff_t *_pos);
	46	static void proc_key_users_next(struct seq_file p, void v, loff_t _pos);
	47	static void proc_key_users_stop(struct seq_file p, void v);
	48	static int proc_key_users_show(struct seq_file m, void v);
	49
	50	static struct seq_operations proc_key_users_ops = {
	51	.start = proc_key_users_start,
	52	.next = proc_key_users_next,
	53	.stop = proc_key_users_stop,
	54	.show = proc_key_users_show,
	55	};
	56
	57	static struct file_operations proc_key_users_fops = {
	58	.open = proc_key_users_open,
	59	.read = seq_read,
	60	.llseek = seq_lseek,
	61	.release = seq_release,
	62	};
	63
	64	/*****************************************************************************/
65	/*
66	* declare the /proc files
67	*/
68	static int __init key_proc_init(void)
69	{
70	struct proc_dir_entry *p;
71
72	#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
73	p = create_proc_entry("keys", 0, NULL);
74	if (!p)
75	panic("Cannot create /proc/keys\n");
76
77	p->proc_fops = &proc_keys_fops;
78	#endif
79
80	p = create_proc_entry("key-users", 0, NULL);
81	if (!p)
82	panic("Cannot create /proc/key-users\n");
83
84	p->proc_fops = &proc_key_users_fops;
85
86	return 0;
87
88	} /* end key_proc_init() */
89
90	__initcall(key_proc_init);
91
92	/*****************************************************************************/
93	/*
94	* implement "/proc/keys" to provides a list of the keys on the system
95	*/
96	#ifdef CONFIG_KEYS_DEBUG_PROC_KEYS
97
98	static int proc_keys_open(struct inode inode, struct file file)
99	{
100	return seq_open(file, &proc_keys_ops);
101
102	}
103
104	static void proc_keys_start(struct seq_file p, loff_t *_pos)
105	{
106	struct rb_node *_p;
107	loff_t pos = *_pos;
108
109	spin_lock(&key_serial_lock);
110
111	_p = rb_first(&key_serial_tree);
112	while (pos > 0 && _p) {
113	pos--;
114	_p = rb_next(_p);
115	}
116
117	return _p;
118
119	}
120
121	static void proc_keys_next(struct seq_file p, void v, loff_t _pos)
122	{
123	(*_pos)++;
124	return rb_next((struct rb_node *) v);
125
126	}
127
128	static void proc_keys_stop(struct seq_file p, void v)
129	{
130	spin_unlock(&key_serial_lock);
131	}
132
133	static int proc_keys_show(struct seq_file m, void v)
134	{
135	struct rb_node *_p = v;
136	struct key *key = rb_entry(_p, struct key, serial_node);
137	struct timespec now;
138	unsigned long timo;
139	char xbuf[12];
140
141	now = current_kernel_time();
142
76d8aeab	143	rcu_read_lock();
1da177e4 LT	144
	145	/* come up with a suitable timeout value */
	146	if (key->expiry == 0) {
	147	memcpy(xbuf, "perm", 5);
	148	}
	149	else if (now.tv_sec >= key->expiry) {
	150	memcpy(xbuf, "expd", 5);
	151	}
	152	else {
	153	timo = key->expiry - now.tv_sec;
	154
	155	if (timo < 60)
	156	sprintf(xbuf, "%lus", timo);
	157	else if (timo < 60*60)
	158	sprintf(xbuf, "%lum", timo / 60);
	159	else if (timo < 606024)
	160	sprintf(xbuf, "%luh", timo / (60*60));
	161	else if (timo < 606024*7)
	162	sprintf(xbuf, "%lud", timo / (606024));
	163	else
	164	sprintf(xbuf, "%luw", timo / (606024*7));
	165	}
	166
76d8aeab DH	167	#define showflag(KEY, LETTER, FLAG) \
	168	(test_bit(FLAG, &(KEY)->flags) ? LETTER : '-')
	169
1da177e4 LT	170	seq_printf(m, "%08x %c%c%c%c%c%c %5d %4s %06x %5d %5d %-9.9s ",
1da177e4 LT	171	key->serial,
76d8aeab DH	172	showflag(key, 'I', KEY_FLAG_INSTANTIATED),
	173	showflag(key, 'R', KEY_FLAG_REVOKED),
	174	showflag(key, 'D', KEY_FLAG_DEAD),
	175	showflag(key, 'Q', KEY_FLAG_IN_QUOTA),
	176	showflag(key, 'U', KEY_FLAG_USER_CONSTRUCT),
	177	showflag(key, 'N', KEY_FLAG_NEGATIVE),
1da177e4 LT	178	atomic_read(&key->usage),
	179	xbuf,
	180	key->perm,
	181	key->uid,
	182	key->gid,
	183	key->type->name);
	184
76d8aeab DH	185	#undef showflag
76d8aeab DH	186
1da177e4 LT	187	if (key->type->describe)
	188	key->type->describe(key, m);
	189	seq_putc(m, '\n');
	190
76d8aeab	191	rcu_read_unlock();
1da177e4 LT	192
	193	return 0;
	194
	195	}
	196
	197	#endif /* CONFIG_KEYS_DEBUG_PROC_KEYS */
	198
	199	/*****************************************************************************/
	200	/*
	201	* implement "/proc/key-users" to provides a list of the key users
	202	*/
	203	static int proc_key_users_open(struct inode inode, struct file file)
	204	{
	205	return seq_open(file, &proc_key_users_ops);
	206
	207	}
	208
	209	static void proc_key_users_start(struct seq_file p, loff_t *_pos)
	210	{
	211	struct rb_node *_p;
	212	loff_t pos = *_pos;
	213
	214	spin_lock(&key_user_lock);
	215
	216	_p = rb_first(&key_user_tree);
	217	while (pos > 0 && _p) {
	218	pos--;
	219	_p = rb_next(_p);
	220	}
	221
	222	return _p;
	223
	224	}
	225
	226	static void proc_key_users_next(struct seq_file p, void v, loff_t _pos)
	227	{
	228	(*_pos)++;
	229	return rb_next((struct rb_node *) v);
	230
	231	}
	232
	233	static void proc_key_users_stop(struct seq_file p, void v)
	234	{
	235	spin_unlock(&key_user_lock);
	236	}
	237
	238	static int proc_key_users_show(struct seq_file m, void v)
	239	{
	240	struct rb_node *_p = v;
	241	struct key_user *user = rb_entry(_p, struct key_user, node);
	242
	243	seq_printf(m, "%5u: %5d %d/%d %d/%d %d/%d\n",
	244	user->uid,
	245	atomic_read(&user->usage),
	246	atomic_read(&user->nkeys),
	247	atomic_read(&user->nikeys),
	248	user->qnkeys,
	249	KEYQUOTA_MAX_KEYS,
	250	user->qnbytes,
	251	KEYQUOTA_MAX_BYTES
	252	);
	253
	254	return 0;
	255
256	}