udev/net/link-config.c

	link-config.c revision 2a73e0d39a9bec82c3800071e375d27164727e71
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering/***
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering This file is part of systemd.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  systemd is free software; you can redistribute it and/or modify it
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  under the terms of the GNU Lesser General Public License as published by
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  (at your option) any later version.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  systemd is distributed in the hope that it will be useful, but
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  Lesser General Public License for more details.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  You should have received a copy of the GNU Lesser General Public License
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering***/
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include <netinet/ether.h>
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include <net/if.h>
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "link-config.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "ethtool-util.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "libudev-private.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "sd-rtnl.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "util.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "log.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "strv.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "path-util.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "conf-parser.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering#include "conf-files.h"
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringstruct link_config_ctx {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        LIST_HEAD(link_config, links);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        int ethtool_fd;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        sd_rtnl *rtnl;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        char **link_dirs;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        usec_t *link_dirs_ts_usec;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering};
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringint link_config_ctx_new(link_config_ctx **ret) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link_config_ctx *ctx;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        int r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering        if (!ret)
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering                return -EINVAL;
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        ctx = new0(link_config_ctx, 1);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (!ctx)
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return -ENOMEM;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        r = ethtool_connect(&ctx->ethtool_fd);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (r < 0) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                link_config_ctx_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        r = sd_rtnl_open(0, &ctx->rtnl);
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering        if (r < 0) {
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering                link_config_ctx_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        LIST_HEAD_INIT(ctx->links);
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering        ctx->link_dirs = strv_new("/etc/net/links",
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering                                  "/run/net/links",
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                                  "/usr/lib/net/links",
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                                  NULL);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (!ctx->link_dirs) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                log_error("failed to build link config directory array");
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                link_config_ctx_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return -ENOMEM;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (!path_strv_canonicalize_uniq(ctx->link_dirs)) {
4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering                log_error("failed to canonicalize link config directories\n");
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                link_config_ctx_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return -ENOMEM;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        ctx->link_dirs_ts_usec = calloc(strv_length(ctx->link_dirs), sizeof(usec_t));
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if(!ctx->link_dirs_ts_usec) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                link_config_ctx_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return -ENOMEM;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        *ret = ctx;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering}
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringstatic void link_configs_free(link_config_ctx *ctx) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link_config *link, *link_next;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (!ctx)
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                return;
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering        LIST_FOREACH_SAFE(links, link, link_next, ctx->links) {
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                free(link->filename);
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                free(link->match_path);
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                free(link->match_driver);
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                free(link->match_type);
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                free(link->description);
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                free(link);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering}
bf7fabd6000fd95495904ed55db62caf361b3d8fLennart Poettering
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poetteringvoid link_config_ctx_free(link_config_ctx *ctx) {
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering        if (!ctx)
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering                return;
4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering        if (ctx->ethtool_fd >= 0)
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                close_nointr_nofail(ctx->ethtool_fd);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        sd_rtnl_unref(ctx->rtnl);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        strv_free(ctx->link_dirs);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        free(ctx->link_dirs_ts_usec);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link_configs_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return;
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering}
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poetteringstatic int load_link(link_config_ctx *ctx, const char *filename) {
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering        link_config *link;
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering        FILE *file;
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering        int r;
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering        file = fopen(filename, "re");
452b4e327d23b9e468d3198f4c91e8efd0b52a71Lennart Poettering        if (!file) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (errno == ENOENT)
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                else
4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering                        return errno;
a51c10485af349eb15faa4d1a63b9818bcf3e589Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link = new0(link_config, 1);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (!link) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                r = log_oom();
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                goto failure;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        r = config_parse(NULL, filename, file, "Match\0Link\0Ethernet\0", config_item_perf_lookup,
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                         (void*) link_config_gperf_lookup, false, false, link);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (r < 0) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                log_warning("Colud not parse config file %s: %s", filename, strerror(-r));
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                goto failure;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        } else
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                log_info("Parsed configuration file %s", filename);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link->filename = strdup(filename);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        LIST_PREPEND(links, ctx->links, link);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringfailure:
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        free(link);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering}
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringint link_config_load(link_config_ctx *ctx) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        int r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        char **files, **f;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link_configs_free(ctx);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        /* update timestamps */
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        paths_check_timestamp(ctx->link_dirs, ctx->link_dirs_ts_usec, true);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        r = conf_files_list_strv(&files, ".link", NULL, (const char **)ctx->link_dirs);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (r < 0) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                log_error("failed to enumerate link files: %s", strerror(-r));
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        STRV_FOREACH_BACKWARDS(f, files) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                r = load_link(ctx, *f);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (r < 0)
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering}
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringbool link_config_should_reload(link_config_ctx *ctx) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return paths_check_timestamp(ctx->link_dirs, ctx->link_dirs_ts_usec, false);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering}
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringstatic bool match_config(link_config *match, struct udev_device *device) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        const char *property;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (match->match_mac) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                property = udev_device_get_sysattr_value(device, "address");
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (!property || !streq(match->match_mac, property)) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        log_debug("Device MAC address (%s) did not match MACAddress=%s", property, match->match_mac);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (match->match_path) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                property = udev_device_get_property_value(device, "ID_PATH");
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (!property || !streq(match->match_path, property)) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        log_debug("Device's persistent path (%s) did not match Path=%s", property, match->match_path);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (match->match_driver) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                property = udev_device_get_driver(device);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (!property || !streq(match->match_driver, property)) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        log_debug("Device driver (%s) did not match Driver=%s", property, match->match_driver);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return 0;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (match->match_type) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                property = udev_device_get_devtype(device);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (!property || !streq(match->match_type, property)) {
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                        log_debug("Device type (%s) did not match Type=%s", property, match->match_type);
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                        return 0;
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                }
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering        }
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return 1;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering}
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringint link_config_get(link_config_ctx *ctx, struct udev_device *device, link_config **ret) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        link_config *link;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        LIST_FOREACH(links, link, ctx->links) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (!match_config(link, device)) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        log_info("Config file %s does not apply to device %s", link->filename, udev_device_get_sysname(device));
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                } else {
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                        log_info("Config file %s applies to device %s", link->filename, udev_device_get_sysname(device));
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                        *ret = link;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return 0;
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                }
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering        }
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        return -ENOENT;
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering}
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poetteringstatic int rtnl_set_properties(sd_rtnl *rtnl, int ifindex, const char *name, const char *mac, unsigned int mtu) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *message;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        char new_name[IFNAMSIZ];
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        struct ether_addr new_mac;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        bool need_update;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        int r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        assert(rtnl);
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering        assert(ifindex > 0);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        r = sd_rtnl_message_link_new(RTM_NEWLINK, ifindex, 0, 0, &message);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (r < 0)
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering        if (name) {
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                strscpy(new_name, IFNAMSIZ, name);
9176a57c101d51b4a7fb4141240b5ce03abac57dLennart Poettering                r = sd_rtnl_message_append(message, IFLA_IFNAME, new_name);
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                if (r < 0)
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering                        return r;
f8dc7e343d903f053070d01f3273db819deee951Lennart Poettering
                need_update = true;
        }

        if (mac) {
                r = sscanf(mac, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
                           &new_mac.ether_addr_octet[0],
                           &new_mac.ether_addr_octet[1],
                           &new_mac.ether_addr_octet[2],
                           &new_mac.ether_addr_octet[3],
                           &new_mac.ether_addr_octet[4],
                           &new_mac.ether_addr_octet[5]);
                if (r != 6)
                        return -EINVAL;
                r = sd_rtnl_message_append(message, IFLA_ADDRESS, &new_mac);
                if (r < 0)
                        return r;

                need_update = true;
        }

        if (mtu > 0) {
                r = sd_rtnl_message_append(message, IFLA_MTU, &mtu);
                if (r < 0)
                        return r;

                need_update = true;
        }

        if  (need_update) {
                r = sd_rtnl_send_with_reply_and_block(rtnl, message, 250 * USEC_PER_MSEC, NULL);
                if (r < 0)
                        return r;
        }

        return 0;
}

int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_device *device) {
        const char *name;
        int r, ifindex;

        name = udev_device_get_sysname(device);
        if (!name)
                return -EINVAL;

        log_info("Configuring %s", name);

        if (config->description) {
                r = udev_device_set_sysattr_value(device, "ifalias",
                                                  config->description);
                if (r < 0)
                        log_warning("Could not set description of %s to '%s': %s",
                                    name, config->description, strerror(-r));
                else
                        log_info("Set link description of %s to '%s'", name,
                                 config->description);
        }

        if (config->speed || config->duplex) {
                r = ethtool_set_speed(ctx->ethtool_fd, name,
                                      config->speed, config->duplex);
                if (r < 0)
                        log_warning("Could not set speed or duplex of %s to %u Mbytes (%s): %s",
                                    name, config->speed, config->duplex, strerror(-r));
                else
                        log_info("Set speed or duplex of %s to %u Mbytes (%s)", name,
                                 config->speed, config->duplex);
        }

        if (config->wol) {
                r = ethtool_set_wol(ctx->ethtool_fd, name, config->wol);
                if (r < 0)
                        log_warning("Could not set WakeOnLan of %s to %s: %s",
                                    name, config->wol, strerror(-r));
                else
                        log_info("Set WakeOnLan of %s to %s", name, config->wol);
        }

        ifindex = udev_device_get_ifindex(device);
        if (ifindex <= 0) {
                log_warning("Could not find ifindex");
                return -ENODEV;
        }

        r = rtnl_set_properties(ctx->rtnl, ifindex, config->name, config->mac, config->mtu);
        if (r < 0) {
                log_warning("Could not set Name, MACAddress or MTU on %s", name);
                return r;
        }

        return 0;
}