Root/
1 | /* |
2 | * Netlink event notifications for SELinux. |
3 | * |
4 | * Author: James Morris <jmorris@redhat.com> |
5 | * |
6 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License version 2, |
10 | * as published by the Free Software Foundation. |
11 | */ |
12 | #include <linux/init.h> |
13 | #include <linux/types.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/stddef.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/list.h> |
18 | #include <linux/skbuff.h> |
19 | #include <linux/netlink.h> |
20 | #include <linux/selinux_netlink.h> |
21 | #include <net/net_namespace.h> |
22 | |
23 | static struct sock *selnl; |
24 | |
25 | static int selnl_msglen(int msgtype) |
26 | { |
27 | int ret = 0; |
28 | |
29 | switch (msgtype) { |
30 | case SELNL_MSG_SETENFORCE: |
31 | ret = sizeof(struct selnl_msg_setenforce); |
32 | break; |
33 | |
34 | case SELNL_MSG_POLICYLOAD: |
35 | ret = sizeof(struct selnl_msg_policyload); |
36 | break; |
37 | |
38 | default: |
39 | BUG(); |
40 | } |
41 | return ret; |
42 | } |
43 | |
44 | static void selnl_add_payload(struct nlmsghdr *nlh, int len, int msgtype, void *data) |
45 | { |
46 | switch (msgtype) { |
47 | case SELNL_MSG_SETENFORCE: { |
48 | struct selnl_msg_setenforce *msg = NLMSG_DATA(nlh); |
49 | |
50 | memset(msg, 0, len); |
51 | msg->val = *((int *)data); |
52 | break; |
53 | } |
54 | |
55 | case SELNL_MSG_POLICYLOAD: { |
56 | struct selnl_msg_policyload *msg = NLMSG_DATA(nlh); |
57 | |
58 | memset(msg, 0, len); |
59 | msg->seqno = *((u32 *)data); |
60 | break; |
61 | } |
62 | |
63 | default: |
64 | BUG(); |
65 | } |
66 | } |
67 | |
68 | static void selnl_notify(int msgtype, void *data) |
69 | { |
70 | int len; |
71 | sk_buff_data_t tmp; |
72 | struct sk_buff *skb; |
73 | struct nlmsghdr *nlh; |
74 | |
75 | len = selnl_msglen(msgtype); |
76 | |
77 | skb = alloc_skb(NLMSG_SPACE(len), GFP_USER); |
78 | if (!skb) |
79 | goto oom; |
80 | |
81 | tmp = skb->tail; |
82 | nlh = NLMSG_PUT(skb, 0, 0, msgtype, len); |
83 | selnl_add_payload(nlh, len, msgtype, data); |
84 | nlh->nlmsg_len = skb->tail - tmp; |
85 | NETLINK_CB(skb).dst_group = SELNLGRP_AVC; |
86 | netlink_broadcast(selnl, skb, 0, SELNLGRP_AVC, GFP_USER); |
87 | out: |
88 | return; |
89 | |
90 | nlmsg_failure: |
91 | kfree_skb(skb); |
92 | oom: |
93 | printk(KERN_ERR "SELinux: OOM in %s\n", __func__); |
94 | goto out; |
95 | } |
96 | |
97 | void selnl_notify_setenforce(int val) |
98 | { |
99 | selnl_notify(SELNL_MSG_SETENFORCE, &val); |
100 | } |
101 | |
102 | void selnl_notify_policyload(u32 seqno) |
103 | { |
104 | selnl_notify(SELNL_MSG_POLICYLOAD, &seqno); |
105 | } |
106 | |
107 | static int __init selnl_init(void) |
108 | { |
109 | selnl = netlink_kernel_create(&init_net, NETLINK_SELINUX, |
110 | SELNLGRP_MAX, NULL, NULL, THIS_MODULE); |
111 | if (selnl == NULL) |
112 | panic("SELinux: Cannot create netlink socket."); |
113 | netlink_set_nonroot(NETLINK_SELINUX, NL_NONROOT_RECV); |
114 | return 0; |
115 | } |
116 | |
117 | __initcall(selnl_init); |
118 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9