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 */ 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 */ 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