1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Netlink routines for CIFS
4 *
5 * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
6 */
7
8 #include <net/genetlink.h>
9 #include <uapi/linux/cifs/cifs_netlink.h>
10
11 #include "netlink.h"
12 #include "cifsglob.h"
13 #include "cifs_debug.h"
14 #include "cifs_swn.h"
15
16 static const struct nla_policy cifs_genl_policy[CIFS_GENL_ATTR_MAX + 1] = {
17 [CIFS_GENL_ATTR_SWN_REGISTRATION_ID] = { .type = NLA_U32 },
18 [CIFS_GENL_ATTR_SWN_NET_NAME] = { .type = NLA_STRING },
19 [CIFS_GENL_ATTR_SWN_SHARE_NAME] = { .type = NLA_STRING },
20 [CIFS_GENL_ATTR_SWN_IP] = { .len = sizeof(struct sockaddr_storage) },
21 [CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY] = { .type = NLA_FLAG },
22 [CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY] = { .type = NLA_FLAG },
23 [CIFS_GENL_ATTR_SWN_IP_NOTIFY] = { .type = NLA_FLAG },
24 [CIFS_GENL_ATTR_SWN_KRB_AUTH] = { .type = NLA_FLAG },
25 [CIFS_GENL_ATTR_SWN_USER_NAME] = { .type = NLA_STRING },
26 [CIFS_GENL_ATTR_SWN_PASSWORD] = { .type = NLA_STRING },
27 [CIFS_GENL_ATTR_SWN_DOMAIN_NAME] = { .type = NLA_STRING },
28 [CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE] = { .type = NLA_U32 },
29 [CIFS_GENL_ATTR_SWN_RESOURCE_STATE] = { .type = NLA_U32 },
30 [CIFS_GENL_ATTR_SWN_RESOURCE_NAME] = { .type = NLA_STRING},
31 };
32
33 static const struct genl_ops cifs_genl_ops[] = {
34 {
35 .cmd = CIFS_GENL_CMD_SWN_NOTIFY,
36 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
37 .doit = cifs_swn_notify,
38 },
39 };
40
41 static const struct genl_multicast_group cifs_genl_mcgrps[] = {
42 [CIFS_GENL_MCGRP_SWN] = { .name = CIFS_GENL_MCGRP_SWN_NAME },
43 };
44
45 struct genl_family cifs_genl_family = {
46 .name = CIFS_GENL_NAME,
47 .version = CIFS_GENL_VERSION,
48 .hdrsize = 0,
49 .maxattr = CIFS_GENL_ATTR_MAX,
50 .module = THIS_MODULE,
51 .policy = cifs_genl_policy,
52 .ops = cifs_genl_ops,
53 .n_ops = ARRAY_SIZE(cifs_genl_ops),
54 .resv_start_op = CIFS_GENL_CMD_SWN_NOTIFY + 1,
55 .mcgrps = cifs_genl_mcgrps,
56 .n_mcgrps = ARRAY_SIZE(cifs_genl_mcgrps),
57 };
58
59 /**
60 * cifs_genl_init - Register generic netlink family
61 *
62 * Return zero if initialized successfully, otherwise non-zero.
63 */
cifs_genl_init(void)64 int cifs_genl_init(void)
65 {
66 int ret;
67
68 ret = genl_register_family(&cifs_genl_family);
69 if (ret < 0) {
70 cifs_dbg(VFS, "%s: failed to register netlink family\n",
71 __func__);
72 return ret;
73 }
74
75 return 0;
76 }
77
78 /**
79 * cifs_genl_exit - Unregister generic netlink family
80 */
cifs_genl_exit(void)81 void cifs_genl_exit(void)
82 {
83 int ret;
84
85 ret = genl_unregister_family(&cifs_genl_family);
86 if (ret < 0) {
87 cifs_dbg(VFS, "%s: failed to unregister netlink family\n",
88 __func__);
89 }
90 }
91