/* * Copyright (C) 2007 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License v.2. */ #include #include #include #include #include "dlm_internal.h" static uint32_t dlm_nl_seqnum; static uint32_t listener_nlportid; static struct genl_family family; static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size) { struct sk_buff *skb; void *data; skb = genlmsg_new(size, GFP_NOFS); if (!skb) return -ENOMEM; /* add the message headers */ data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd); if (!data) { nlmsg_free(skb); return -EINVAL; } *skbp = skb; return 0; } static struct dlm_lock_data *mk_data(struct sk_buff *skb) { struct nlattr *ret; ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data)); if (!ret) return NULL; return nla_data(ret); } static int send_data(struct sk_buff *skb) { struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data); void *data = genlmsg_data(genlhdr); genlmsg_end(skb, data); return genlmsg_unicast(&init_net, skb, listener_nlportid); } static int user_cmd(struct sk_buff *skb, struct genl_info *info) { listener_nlportid = info->snd_portid; printk("user_cmd nlpid %u\n", listener_nlportid); return 0; } static const struct genl_ops dlm_nl_ops[] = { { .cmd = DLM_CMD_HELLO, .doit = user_cmd, }, }; static struct genl_family family __ro_after_init = { .name = DLM_GENL_NAME, .version = DLM_GENL_VERSION, .ops = dlm_nl_ops, .n_ops = ARRAY_SIZE(dlm_nl_ops), .module = THIS_MODULE, }; int __init dlm_netlink_init(void) { return genl_register_family(&family); } void dlm_netlink_exit(void) { genl_unregister_family(&family); } static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb) { struct dlm_rsb *r = lkb->lkb_resource; memset(data, 0, sizeof(struct dlm_lock_data)); data->version = DLM_LOCK_DATA_VERSION; data->nodeid = lkb->lkb_nodeid; data->ownpid = lkb->lkb_ownpid; data->id = lkb->lkb_id; data->remid = lkb->lkb_remid; data->status = lkb->lkb_status; data->grmode = lkb->lkb_grmode; data->rqmode = lkb->lkb_rqmode; if (lkb->lkb_ua) data->xid = lkb->lkb_ua->xid; if (r) { data->lockspace_id = r->res_ls->ls_global_id; data->resource_namelen = r->res_length; memcpy(data->resource_name, r->res_name, r->res_length); } } void dlm_timeout_warn(struct dlm_lkb *lkb) { struct sk_buff *uninitialized_var(send_skb); struct dlm_lock_data *data; size_t size; int rv; size = nla_total_size(sizeof(struct dlm_lock_data)) + nla_total_size(0); /* why this? */ rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size); if (rv < 0) return; data = mk_data(send_skb); if (!data) { nlmsg_free(send_skb); return; } fill_data(data, lkb); send_data(send_skb); } og/?h=nds-private-remove&id=14b89f36eed2993670906a3991bca496a5ebf1a6'>root/tools/perf/Documentation/perf.txt

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