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-rw-r--r--fs/smb/client/netlink.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/fs/smb/client/netlink.c b/fs/smb/client/netlink.c
new file mode 100644
index 000000000000..147d9409252c
--- /dev/null
+++ b/fs/smb/client/netlink.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Netlink routines for CIFS
+ *
+ * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
+ */
+
+#include <net/genetlink.h>
+#include <uapi/linux/cifs/cifs_netlink.h>
+
+#include "netlink.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifs_swn.h"
+
+static const struct nla_policy cifs_genl_policy[CIFS_GENL_ATTR_MAX + 1] = {
+ [CIFS_GENL_ATTR_SWN_REGISTRATION_ID] = { .type = NLA_U32 },
+ [CIFS_GENL_ATTR_SWN_NET_NAME] = { .type = NLA_STRING },
+ [CIFS_GENL_ATTR_SWN_SHARE_NAME] = { .type = NLA_STRING },
+ [CIFS_GENL_ATTR_SWN_IP] = { .len = sizeof(struct sockaddr_storage) },
+ [CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY] = { .type = NLA_FLAG },
+ [CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY] = { .type = NLA_FLAG },
+ [CIFS_GENL_ATTR_SWN_IP_NOTIFY] = { .type = NLA_FLAG },
+ [CIFS_GENL_ATTR_SWN_KRB_AUTH] = { .type = NLA_FLAG },
+ [CIFS_GENL_ATTR_SWN_USER_NAME] = { .type = NLA_STRING },
+ [CIFS_GENL_ATTR_SWN_PASSWORD] = { .type = NLA_STRING },
+ [CIFS_GENL_ATTR_SWN_DOMAIN_NAME] = { .type = NLA_STRING },
+ [CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE] = { .type = NLA_U32 },
+ [CIFS_GENL_ATTR_SWN_RESOURCE_STATE] = { .type = NLA_U32 },
+ [CIFS_GENL_ATTR_SWN_RESOURCE_NAME] = { .type = NLA_STRING},
+};
+
+static const struct genl_ops cifs_genl_ops[] = {
+ {
+ .cmd = CIFS_GENL_CMD_SWN_NOTIFY,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = cifs_swn_notify,
+ },
+};
+
+static const struct genl_multicast_group cifs_genl_mcgrps[] = {
+ [CIFS_GENL_MCGRP_SWN] = { .name = CIFS_GENL_MCGRP_SWN_NAME },
+};
+
+struct genl_family cifs_genl_family = {
+ .name = CIFS_GENL_NAME,
+ .version = CIFS_GENL_VERSION,
+ .hdrsize = 0,
+ .maxattr = CIFS_GENL_ATTR_MAX,
+ .module = THIS_MODULE,
+ .policy = cifs_genl_policy,
+ .ops = cifs_genl_ops,
+ .n_ops = ARRAY_SIZE(cifs_genl_ops),
+ .resv_start_op = CIFS_GENL_CMD_SWN_NOTIFY + 1,
+ .mcgrps = cifs_genl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(cifs_genl_mcgrps),
+};
+
+/**
+ * cifs_genl_init - Register generic netlink family
+ *
+ * Return zero if initialized successfully, otherwise non-zero.
+ */
+int cifs_genl_init(void)
+{
+ int ret;
+
+ ret = genl_register_family(&cifs_genl_family);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: failed to register netlink family\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * cifs_genl_exit - Unregister generic netlink family
+ */
+void cifs_genl_exit(void)
+{
+ int ret;
+
+ ret = genl_unregister_family(&cifs_genl_family);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: failed to unregister netlink family\n",
+ __func__);
+ }
+}