2 * Copyright (C) 2007 Red Hat, Inc. All rights reserved.
4 * This copyrighted material is made available to anyone wishing to use,
5 * modify, copy, or redistribute it subject to the terms and conditions
6 * of the GNU General Public License v.2.
9 #include <net/genetlink.h>
10 #include <linux/dlm.h>
11 #include <linux/dlm_netlink.h>
12 #include <linux/gfp.h>
14 #include "dlm_internal.h"
16 static uint32_t dlm_nl_seqnum;
17 static uint32_t listener_nlportid;
19 static struct genl_family family;
21 static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
26 skb = genlmsg_new(size, GFP_NOFS);
30 /* add the message headers */
31 data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd);
41 static struct dlm_lock_data *mk_data(struct sk_buff *skb)
45 ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data));
51 static int send_data(struct sk_buff *skb)
53 struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
54 void *data = genlmsg_data(genlhdr);
56 genlmsg_end(skb, data);
58 return genlmsg_unicast(&init_net, skb, listener_nlportid);
61 static int user_cmd(struct sk_buff *skb, struct genl_info *info)
63 listener_nlportid = info->snd_portid;
64 printk("user_cmd nlpid %u\n", listener_nlportid);
68 static const struct genl_ops dlm_nl_ops[] = {
71 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
76 static struct genl_family family __ro_after_init = {
77 .name = DLM_GENL_NAME,
78 .version = DLM_GENL_VERSION,
80 .n_ops = ARRAY_SIZE(dlm_nl_ops),
81 .module = THIS_MODULE,
84 int __init dlm_netlink_init(void)
86 return genl_register_family(&family);
89 void dlm_netlink_exit(void)
91 genl_unregister_family(&family);
94 static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb)
96 struct dlm_rsb *r = lkb->lkb_resource;
98 memset(data, 0, sizeof(struct dlm_lock_data));
100 data->version = DLM_LOCK_DATA_VERSION;
101 data->nodeid = lkb->lkb_nodeid;
102 data->ownpid = lkb->lkb_ownpid;
103 data->id = lkb->lkb_id;
104 data->remid = lkb->lkb_remid;
105 data->status = lkb->lkb_status;
106 data->grmode = lkb->lkb_grmode;
107 data->rqmode = lkb->lkb_rqmode;
109 data->xid = lkb->lkb_ua->xid;
111 data->lockspace_id = r->res_ls->ls_global_id;
112 data->resource_namelen = r->res_length;
113 memcpy(data->resource_name, r->res_name, r->res_length);
117 void dlm_timeout_warn(struct dlm_lkb *lkb)
119 struct sk_buff *uninitialized_var(send_skb);
120 struct dlm_lock_data *data;
124 size = nla_total_size(sizeof(struct dlm_lock_data)) +
125 nla_total_size(0); /* why this? */
127 rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size);
131 data = mk_data(send_skb);
133 nlmsg_free(send_skb);
137 fill_data(data, lkb);