capabilities: implement per-process securebits
[linux-3.10.git] / security / capability.c
1 /*
2  *  Capabilities Linux Security Module
3  *
4  *      This program is free software; you can redistribute it and/or modify
5  *      it under the terms of the GNU General Public License as published by
6  *      the Free Software Foundation; either version 2 of the License, or
7  *      (at your option) any later version.
8  *
9  */
10
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/security.h>
14 #include <linux/file.h>
15 #include <linux/mm.h>
16 #include <linux/mman.h>
17 #include <linux/pagemap.h>
18 #include <linux/swap.h>
19 #include <linux/skbuff.h>
20 #include <linux/netlink.h>
21 #include <linux/ptrace.h>
22 #include <linux/moduleparam.h>
23
24 static struct security_operations capability_ops = {
25         .ptrace =                       cap_ptrace,
26         .capget =                       cap_capget,
27         .capset_check =                 cap_capset_check,
28         .capset_set =                   cap_capset_set,
29         .capable =                      cap_capable,
30         .settime =                      cap_settime,
31         .netlink_send =                 cap_netlink_send,
32         .netlink_recv =                 cap_netlink_recv,
33
34         .bprm_apply_creds =             cap_bprm_apply_creds,
35         .bprm_set_security =            cap_bprm_set_security,
36         .bprm_secureexec =              cap_bprm_secureexec,
37
38         .inode_setxattr =               cap_inode_setxattr,
39         .inode_removexattr =            cap_inode_removexattr,
40         .inode_need_killpriv =          cap_inode_need_killpriv,
41         .inode_killpriv =               cap_inode_killpriv,
42
43         .task_setscheduler =            cap_task_setscheduler,
44         .task_setioprio =               cap_task_setioprio,
45         .task_setnice =                 cap_task_setnice,
46         .task_post_setuid =             cap_task_post_setuid,
47         .task_prctl =                   cap_task_prctl,
48         .task_reparent_to_init =        cap_task_reparent_to_init,
49
50         .syslog =                       cap_syslog,
51
52         .vm_enough_memory =             cap_vm_enough_memory,
53 };
54
55 /* flag to keep track of how we were registered */
56 static int secondary;
57
58 static int capability_disable;
59 module_param_named(disable, capability_disable, int, 0);
60
61 static int __init capability_init (void)
62 {
63         if (capability_disable) {
64                 printk(KERN_INFO "Capabilities disabled at initialization\n");
65                 return 0;
66         }
67         /* register ourselves with the security framework */
68         if (register_security (&capability_ops)) {
69                 /* try registering with primary module */
70                 if (mod_reg_security (KBUILD_MODNAME, &capability_ops)) {
71                         printk (KERN_INFO "Failure registering capabilities "
72                                 "with primary security module.\n");
73                         return -EINVAL;
74                 }
75                 secondary = 1;
76         }
77         printk (KERN_INFO "Capability LSM initialized%s\n",
78                 secondary ? " as secondary" : "");
79         return 0;
80 }
81
82 security_initcall (capability_init);