]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - fs/dlm/netlink.c
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_nlpid
;
19 static struct genl_family family
= {
20 .id
= GENL_ID_GENERATE
,
21 .name
= DLM_GENL_NAME
,
22 .version
= DLM_GENL_VERSION
,
25 static int prepare_data(u8 cmd
, struct sk_buff
**skbp
, size_t size
)
30 skb
= genlmsg_new(size
, GFP_NOFS
);
34 /* add the message headers */
35 data
= genlmsg_put(skb
, 0, dlm_nl_seqnum
++, &family
, 0, cmd
);
45 static struct dlm_lock_data
*mk_data(struct sk_buff
*skb
)
49 ret
= nla_reserve(skb
, DLM_TYPE_LOCK
, sizeof(struct dlm_lock_data
));
55 static int send_data(struct sk_buff
*skb
)
57 struct genlmsghdr
*genlhdr
= nlmsg_data((struct nlmsghdr
*)skb
->data
);
58 void *data
= genlmsg_data(genlhdr
);
61 rv
= genlmsg_end(skb
, data
);
67 return genlmsg_unicast(&init_net
, skb
, listener_nlpid
);
70 static int user_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
72 listener_nlpid
= info
->snd_pid
;
73 printk("user_cmd nlpid %u\n", listener_nlpid
);
77 static struct genl_ops dlm_nl_ops
= {
82 int __init
dlm_netlink_init(void)
86 rv
= genl_register_family(&family
);
90 rv
= genl_register_ops(&family
, &dlm_nl_ops
);
95 genl_unregister_family(&family
);
99 void dlm_netlink_exit(void)
101 genl_unregister_ops(&family
, &dlm_nl_ops
);
102 genl_unregister_family(&family
);
105 static void fill_data(struct dlm_lock_data
*data
, struct dlm_lkb
*lkb
)
107 struct dlm_rsb
*r
= lkb
->lkb_resource
;
109 memset(data
, 0, sizeof(struct dlm_lock_data
));
111 data
->version
= DLM_LOCK_DATA_VERSION
;
112 data
->nodeid
= lkb
->lkb_nodeid
;
113 data
->ownpid
= lkb
->lkb_ownpid
;
114 data
->id
= lkb
->lkb_id
;
115 data
->remid
= lkb
->lkb_remid
;
116 data
->status
= lkb
->lkb_status
;
117 data
->grmode
= lkb
->lkb_grmode
;
118 data
->rqmode
= lkb
->lkb_rqmode
;
120 data
->xid
= lkb
->lkb_ua
->xid
;
122 data
->lockspace_id
= r
->res_ls
->ls_global_id
;
123 data
->resource_namelen
= r
->res_length
;
124 memcpy(data
->resource_name
, r
->res_name
, r
->res_length
);
128 void dlm_timeout_warn(struct dlm_lkb
*lkb
)
130 struct sk_buff
*uninitialized_var(send_skb
);
131 struct dlm_lock_data
*data
;
135 size
= nla_total_size(sizeof(struct dlm_lock_data
)) +
136 nla_total_size(0); /* why this? */
138 rv
= prepare_data(DLM_CMD_TIMEOUT
, &send_skb
, size
);
142 data
= mk_data(send_skb
);
144 nlmsg_free(send_skb
);
148 fill_data(data
, lkb
);