initial commit with v2.6.9
[linux-2.6.9-moxart.git] / security / capability.c
blob532023c652caa6f7c7f69a8faafcf336c0530750
1 /*
2 * Capabilities Linux Security Module
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.
9 */
11 #include <linux/config.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/security.h>
16 #include <linux/file.h>
17 #include <linux/mm.h>
18 #include <linux/mman.h>
19 #include <linux/pagemap.h>
20 #include <linux/swap.h>
21 #include <linux/smp_lock.h>
22 #include <linux/skbuff.h>
23 #include <linux/netlink.h>
24 #include <linux/ptrace.h>
25 #include <linux/moduleparam.h>
27 static struct security_operations capability_ops = {
28 .ptrace = cap_ptrace,
29 .capget = cap_capget,
30 .capset_check = cap_capset_check,
31 .capset_set = cap_capset_set,
32 .capable = cap_capable,
33 .netlink_send = cap_netlink_send,
34 .netlink_recv = cap_netlink_recv,
36 .bprm_apply_creds = cap_bprm_apply_creds,
37 .bprm_set_security = cap_bprm_set_security,
38 .bprm_secureexec = cap_bprm_secureexec,
40 .inode_setxattr = cap_inode_setxattr,
41 .inode_removexattr = cap_inode_removexattr,
43 .task_post_setuid = cap_task_post_setuid,
44 .task_reparent_to_init = cap_task_reparent_to_init,
46 .syslog = cap_syslog,
48 .vm_enough_memory = cap_vm_enough_memory,
51 #define MY_NAME __stringify(KBUILD_MODNAME)
53 /* flag to keep track of how we were registered */
54 static int secondary;
56 static int capability_disable;
57 module_param_named(disable, capability_disable, int, 0);
58 MODULE_PARM_DESC(disable, "To disable capabilities module set disable = 1");
60 static int __init capability_init (void)
62 if (capability_disable) {
63 printk(KERN_INFO "Capabilities disabled at initialization\n");
64 return 0;
66 /* register ourselves with the security framework */
67 if (register_security (&capability_ops)) {
68 /* try registering with primary module */
69 if (mod_reg_security (MY_NAME, &capability_ops)) {
70 printk (KERN_INFO "Failure registering capabilities "
71 "with primary security module.\n");
72 return -EINVAL;
74 secondary = 1;
76 printk (KERN_INFO "Capability LSM initialized%s\n",
77 secondary ? " as secondary" : "");
78 return 0;
81 static void __exit capability_exit (void)
83 if (capability_disable)
84 return;
85 /* remove ourselves from the security framework */
86 if (secondary) {
87 if (mod_unreg_security (MY_NAME, &capability_ops))
88 printk (KERN_INFO "Failure unregistering capabilities "
89 "with primary module.\n");
90 return;
93 if (unregister_security (&capability_ops)) {
94 printk (KERN_INFO
95 "Failure unregistering capabilities with the kernel\n");
99 security_initcall (capability_init);
100 module_exit (capability_exit);
102 MODULE_DESCRIPTION("Standard Linux Capabilities Security Module");
103 MODULE_LICENSE("GPL");