/* proc.c: proc files for key database enumeration * * 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/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_KEYSstatic 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 %08x %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; }