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![Ed Maste](/assets/img/avatar_default.png)
The amd64-gcc12 build was failing with `error: 'devctl_systems' defined but not used`. Just move it to the C file where it's used. PR: 271903 Sponsored by: The FreeBSD Foundation
204 lines
5.4 KiB
C
204 lines
5.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2023 Baptiste Daroussin <bapt@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/devctl.h>
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#include <sys/errno.h>
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#include <sys/module.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <net/vnet.h>
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#include <netlink/netlink.h>
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#include <netlink/netlink_ctl.h>
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#include <netlink/netlink_generic.h>
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#include <netlink/netlink_sysevent.h>
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#define DEBUG_MOD_NAME nl_sysevent
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#define DEBUG_MAX_LEVEL LOG_DEBUG3
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#include <netlink/netlink_debug.h>
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_DECLARE_DEBUG(LOG_INFO);
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MALLOC_DEFINE(M_NLSE, "nlsysevent", "Memory used for Netlink sysevent");
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#define NLSE_FAMILY_NAME "nlsysevent"
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static uint32_t ctrl_family_id;
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#define MAX_SYSEVENT_GROUPS 64
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static struct sysevent_group {
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char *name;
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uint32_t id;
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} sysevent_groups[MAX_SYSEVENT_GROUPS] = {};
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static const char *devctl_systems[] = {
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"ACPI",
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"AEON",
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"CAM",
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"CARP",
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"coretemp",
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"DEVFS",
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"device",
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"ETHERNET",
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"GEOM",
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"HYPERV_NIC_VF",
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"IFNET",
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"INFINIBAND",
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"KERNEL",
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"nvme",
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"PMU",
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"RCTL",
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"USB",
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"VFS",
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"VT",
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"ZFS",
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};
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static void
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sysevent_write(struct sysevent_group *se, const char *subsystem, const char *type,
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const char *data)
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{
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struct nl_writer nw = {};
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if (!nlmsg_get_group_writer(&nw, NLMSG_LARGE, NETLINK_GENERIC, se->id)) {
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NL_LOG(LOG_DEBUG, "error allocating group writer");
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return;
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}
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struct nlmsghdr hdr = { .nlmsg_type = ctrl_family_id };
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if (!nlmsg_reply(&nw, &hdr, sizeof(struct genlmsghdr))) {
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return;
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}
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struct genlmsghdr *ghdr = nlmsg_reserve_object(&nw, struct genlmsghdr);
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if (ghdr == NULL) {
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NL_LOG(LOG_DEBUG, "unable to allocate memory");
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return;
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}
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ghdr->version = 0;
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ghdr->cmd = NLSE_CMD_NEWEVENT;
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ghdr->reserved = 0;
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nlattr_add_string(&nw, NLSE_ATTR_SYSTEM, se->name);
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nlattr_add_string(&nw, NLSE_ATTR_SUBSYSTEM, subsystem);
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nlattr_add_string(&nw, NLSE_ATTR_TYPE, type);
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if (data != NULL)
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nlattr_add_string(&nw, NLSE_ATTR_DATA, data);
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nlmsg_end(&nw);
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nlmsg_flush(&nw);
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}
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static void
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sysevent_new_group(size_t index, const char *name)
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{
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if (index >= MAX_SYSEVENT_GROUPS) {
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NL_LOG(LOG_WARNING, "impossible to add the event %s, "
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"too many event groups\n", name);
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return;
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}
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sysevent_groups[index].name = strdup(name, M_NLSE);
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sysevent_groups[index].id = genl_register_group(NLSE_FAMILY_NAME, sysevent_groups[index].name);
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}
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static struct sysevent_group *
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sysevent_get_group(const char *system)
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{
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for (size_t i = 0; i < MAX_SYSEVENT_GROUPS; i++) {
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if (sysevent_groups[i].name == NULL) {
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sysevent_new_group(i, system);
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return (&sysevent_groups[i]);
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}
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if (strcmp(sysevent_groups[i].name, system) == 0)
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return (&sysevent_groups[i]);
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}
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return (NULL);
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}
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static void
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sysevent_send(const char *system, const char *subsystem, const char *type,
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const char *data)
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{
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struct sysevent_group *se = sysevent_get_group(system);
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if (se == NULL) {
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NL_LOG(LOG_WARNING, "impossible to add the event %s, "
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"too many event groups\n", system);
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return;
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}
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CURVNET_SET(vnet0);
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sysevent_write(se, subsystem, type, data);
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CURVNET_RESTORE();
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}
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static void
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nlsysevent_load(void)
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{
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devctl_set_notify_hook(sysevent_send);
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ctrl_family_id = genl_register_family(NLSE_FAMILY_NAME, 0, 2, NLSE_ATTR_MAX);
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for (size_t i = 0; i < nitems(devctl_systems); i++) {
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if (i >= MAX_SYSEVENT_GROUPS) {
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NL_LOG(LOG_WARNING, "impossible to add the event %s, too many events\n", devctl_systems[i]);
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continue;
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}
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sysevent_new_group(i, devctl_systems[i]);
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}
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}
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static void
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nlsysevent_unload(void)
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{
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devctl_unset_notify_hook();
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genl_unregister_family(NLSE_FAMILY_NAME);
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for (size_t i = 0; i < MAX_SYSEVENT_GROUPS; i++) {
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if (sysevent_groups[i].name == NULL)
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break;
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free(sysevent_groups[i].name, M_NLSE);
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}
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}
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static int
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nlsysevent_loader(module_t mod __unused, int what, void *priv __unused)
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{
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int err = 0;
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switch (what) {
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case MOD_LOAD:
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nlsysevent_load();
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break;
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case MOD_UNLOAD:
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nlsysevent_unload();
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break;
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default:
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err = EOPNOTSUPP;
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break;
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}
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return (err);
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}
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static moduledata_t nlsysevent_mod = { "nlsysevent", nlsysevent_loader, NULL};
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DECLARE_MODULE(nlsysevent, nlsysevent_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
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MODULE_DEPEND(nlsysevent, netlink, 1, 1, 1);
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MODULE_VERSION(nlsysevent, 1);
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