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https://github.com/ibm-s390-linux/s390-tools.git
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e8550a4f8d
The opticsmon tool started out as a tool for monitoring the health of optical modules in directly attached PCI NICs. In the future however it will also monitor the health of other PCI devices. In particular in a first step it will monitor the health of directly attached NVMe devices. To reflect this broadening of its scope rename opticsmon to zpcimon. Add zpcimon.service and install it both under the new name and symlinked as opticsmon.service for backwards compatibility. Since users are expected to mostly just enable the service this keeps old instructions just working. Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/*
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* Copyright IBM Corp. 2024
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <errno.h>
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#include <sys/epoll.h>
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#include <sys/signalfd.h>
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#include <signal.h>
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#include <linux/if.h>
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#include <netlink/route/link.h>
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#include <netlink/netlink.h>
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#include "link_mon.h"
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#define MAX_EVENTS 32
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static void nl_obj_parsed_cb(struct nl_object *obj, void *arg)
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{
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struct link_mon_nl_ctx *ctx = arg;
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struct rtnl_link *link;
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struct zpci_netdev netdev;
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if (strcmp(nl_object_get_type(obj), "route/link") != 0)
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return;
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link = (struct rtnl_link *)obj;
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netdev.name = rtnl_link_get_name(link);
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netdev.operstate = rtnl_link_get_operstate(link);
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ctx->cb(&netdev, ctx->arg);
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}
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static int nl_rtnl_lnkgrp_cb(struct nl_msg *msg, void *arg)
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{
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if (nl_msg_parse(msg, &nl_obj_parsed_cb, arg) < 0)
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fprintf(stderr, "<<EVENT>> Unknown message type\n");
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return NL_STOP;
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}
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void link_mon_nl_waitfd_read(struct link_mon_nl_ctx *ctx)
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{
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nl_recvmsgs_default(ctx->sk);
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}
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int link_mon_nl_waitfd_getfd(struct link_mon_nl_ctx *ctx)
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{
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return nl_socket_get_fd(ctx->sk);
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}
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int link_mon_nl_waitfd_create(struct link_mon_nl_ctx *ctx, link_mon_nl_cb cb, void *arg)
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{
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int ret = 0, rc = 0;
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ctx->sk = nl_socket_alloc();
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if (!ctx->sk)
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return -ENOMEM;
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ctx->cb = cb;
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ctx->arg = arg;
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nl_socket_disable_seq_check(ctx->sk);
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nl_socket_modify_cb(ctx->sk, NL_CB_VALID, NL_CB_CUSTOM, nl_rtnl_lnkgrp_cb, ctx);
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rc = nl_connect(ctx->sk, NETLINK_ROUTE);
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if (rc < 0) {
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ret = rc;
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goto err_free;
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}
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rc = nl_socket_add_membership(ctx->sk, RTNLGRP_LINK);
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if (rc < 0) {
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ret = rc;
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goto err_close;
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}
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rc = rtnl_link_alloc_cache(ctx->sk, AF_UNSPEC, &ctx->cache);
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if (rc < 0) {
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ret = rc;
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goto err_close;
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}
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nl_cache_mngt_provide(ctx->cache);
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return 0;
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err_close:
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nl_close(ctx->sk);
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err_free:
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nl_socket_free(ctx->sk);
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return ret;
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}
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void link_mon_nl_waitfd_destroy(struct link_mon_nl_ctx *ctx)
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{
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nl_cache_free(ctx->cache);
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nl_close(ctx->sk);
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nl_socket_free(ctx->sk);
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}
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