^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2007 Red Hat, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <net/genetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/dlm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/dlm_netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "dlm_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static uint32_t dlm_nl_seqnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static uint32_t listener_nlportid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static struct genl_family family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) skb = genlmsg_new(size, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* add the message headers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) nlmsg_free(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) *skbp = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static struct dlm_lock_data *mk_data(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct nlattr *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return nla_data(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int send_data(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) void *data = genlmsg_data(genlhdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) genlmsg_end(skb, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return genlmsg_unicast(&init_net, skb, listener_nlportid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int user_cmd(struct sk_buff *skb, struct genl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) listener_nlportid = info->snd_portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) printk("user_cmd nlpid %u\n", listener_nlportid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static const struct genl_small_ops dlm_nl_ops[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .cmd = DLM_CMD_HELLO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .doit = user_cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static struct genl_family family __ro_after_init = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .name = DLM_GENL_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .version = DLM_GENL_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .small_ops = dlm_nl_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .n_small_ops = ARRAY_SIZE(dlm_nl_ops),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int __init dlm_netlink_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return genl_register_family(&family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void dlm_netlink_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) genl_unregister_family(&family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct dlm_rsb *r = lkb->lkb_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) memset(data, 0, sizeof(struct dlm_lock_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) data->version = DLM_LOCK_DATA_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) data->nodeid = lkb->lkb_nodeid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) data->ownpid = lkb->lkb_ownpid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) data->id = lkb->lkb_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) data->remid = lkb->lkb_remid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) data->status = lkb->lkb_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) data->grmode = lkb->lkb_grmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) data->rqmode = lkb->lkb_rqmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (lkb->lkb_ua)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) data->xid = lkb->lkb_ua->xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) data->lockspace_id = r->res_ls->ls_global_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) data->resource_namelen = r->res_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) memcpy(data->resource_name, r->res_name, r->res_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) void dlm_timeout_warn(struct dlm_lkb *lkb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct sk_buff *send_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct dlm_lock_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) size = nla_total_size(sizeof(struct dlm_lock_data)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) nla_total_size(0); /* why this? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (rv < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) data = mk_data(send_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) nlmsg_free(send_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) fill_data(data, lkb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) send_data(send_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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