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 (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 | ||
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 | ||
143 | read_lock(&key->lock); | |
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 < 60*60*24) | |
160 | sprintf(xbuf, "%luh", timo / (60*60)); | |
161 | else if (timo < 60*60*24*7) | |
162 | sprintf(xbuf, "%lud", timo / (60*60*24)); | |
163 | else | |
164 | sprintf(xbuf, "%luw", timo / (60*60*24*7)); | |
165 | } | |
166 | ||
167 | seq_printf(m, "%08x %c%c%c%c%c%c %5d %4s %06x %5d %5d %-9.9s ", | |
168 | key->serial, | |
169 | key->flags & KEY_FLAG_INSTANTIATED ? 'I' : '-', | |
170 | key->flags & KEY_FLAG_REVOKED ? 'R' : '-', | |
171 | key->flags & KEY_FLAG_DEAD ? 'D' : '-', | |
172 | key->flags & KEY_FLAG_IN_QUOTA ? 'Q' : '-', | |
173 | key->flags & KEY_FLAG_USER_CONSTRUCT ? 'U' : '-', | |
174 | key->flags & KEY_FLAG_NEGATIVE ? 'N' : '-', | |
175 | atomic_read(&key->usage), | |
176 | xbuf, | |
177 | key->perm, | |
178 | key->uid, | |
179 | key->gid, | |
180 | key->type->name); | |
181 | ||
182 | if (key->type->describe) | |
183 | key->type->describe(key, m); | |
184 | seq_putc(m, '\n'); | |
185 | ||
186 | read_unlock(&key->lock); | |
187 | ||
188 | return 0; | |
189 | ||
190 | } | |
191 | ||
192 | #endif /* CONFIG_KEYS_DEBUG_PROC_KEYS */ | |
193 | ||
194 | /*****************************************************************************/ | |
195 | /* | |
196 | * implement "/proc/key-users" to provides a list of the key users | |
197 | */ | |
198 | static int proc_key_users_open(struct inode *inode, struct file *file) | |
199 | { | |
200 | return seq_open(file, &proc_key_users_ops); | |
201 | ||
202 | } | |
203 | ||
204 | static void *proc_key_users_start(struct seq_file *p, loff_t *_pos) | |
205 | { | |
206 | struct rb_node *_p; | |
207 | loff_t pos = *_pos; | |
208 | ||
209 | spin_lock(&key_user_lock); | |
210 | ||
211 | _p = rb_first(&key_user_tree); | |
212 | while (pos > 0 && _p) { | |
213 | pos--; | |
214 | _p = rb_next(_p); | |
215 | } | |
216 | ||
217 | return _p; | |
218 | ||
219 | } | |
220 | ||
221 | static void *proc_key_users_next(struct seq_file *p, void *v, loff_t *_pos) | |
222 | { | |
223 | (*_pos)++; | |
224 | return rb_next((struct rb_node *) v); | |
225 | ||
226 | } | |
227 | ||
228 | static void proc_key_users_stop(struct seq_file *p, void *v) | |
229 | { | |
230 | spin_unlock(&key_user_lock); | |
231 | } | |
232 | ||
233 | static int proc_key_users_show(struct seq_file *m, void *v) | |
234 | { | |
235 | struct rb_node *_p = v; | |
236 | struct key_user *user = rb_entry(_p, struct key_user, node); | |
237 | ||
238 | seq_printf(m, "%5u: %5d %d/%d %d/%d %d/%d\n", | |
239 | user->uid, | |
240 | atomic_read(&user->usage), | |
241 | atomic_read(&user->nkeys), | |
242 | atomic_read(&user->nikeys), | |
243 | user->qnkeys, | |
244 | KEYQUOTA_MAX_KEYS, | |
245 | user->qnbytes, | |
246 | KEYQUOTA_MAX_BYTES | |
247 | ); | |
248 | ||
249 | return 0; | |
250 | ||
251 | } |