+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <netinet/ether.h>
-#include <linux/netdevice.h>
-
-
-#include "missing.h"
-#include "link-config.h"
-#include "ethtool-util.h"
-
-#include "libudev-private.h"
-#include "sd-rtnl.h"
-#include "util.h"
-#include "log.h"
-#include "strv.h"
-#include "path-util.h"
-#include "conf-parser.h"
-#include "conf-files.h"
-#include "rtnl-util.h"
-#include "network-internal.h"
-
-struct link_config_ctx {
- LIST_HEAD(link_config, links);
-
- int ethtool_fd;
-
- bool enable_name_policy;
-
- sd_rtnl *rtnl;
-
- usec_t link_dirs_ts_usec;
-};
-
-static const char* const link_dirs[] = {
- "/etc/systemd/network",
- "/run/systemd/network",
- "/usr/lib/systemd/network",
-#ifdef HAVE_SPLIT_USR
- "/lib/systemd/network",
-#endif
- NULL};
-
-static void link_config_free(link_config *link) {
- if (!link)
- return;
-
- free(link->filename);
-
- free(link->match_mac);
- free(link->match_path);
- free(link->match_driver);
- free(link->match_type);
- free(link->match_name);
- free(link->match_host);
- free(link->match_virt);
- free(link->match_kernel);
- free(link->match_arch);
-
- free(link->description);
- free(link->mac);
- free(link->name_policy);
- free(link->name);
- free(link->alias);
-
- free(link);
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(link_config*, link_config_free);
-
-static void link_configs_free(link_config_ctx *ctx) {
- link_config *link, *link_next;
-
- if (!ctx)
- return;
-
- LIST_FOREACH_SAFE(links, link, link_next, ctx->links)
- link_config_free(link);
-}
-
-void link_config_ctx_free(link_config_ctx *ctx) {
- if (!ctx)
- return;
-
- safe_close(ctx->ethtool_fd);
-
- sd_rtnl_unref(ctx->rtnl);
-
- link_configs_free(ctx);
-
- free(ctx);
-
- return;
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);
-
-int link_config_ctx_new(link_config_ctx **ret) {
- _cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;
-
- if (!ret)
- return -EINVAL;
-
- ctx = new0(link_config_ctx, 1);
- if (!ctx)
- return -ENOMEM;
-
- LIST_HEAD_INIT(ctx->links);
-
- ctx->ethtool_fd = -1;
-
- ctx->enable_name_policy = true;
-
- *ret = ctx;
- ctx = NULL;
-
- return 0;
-}
-
-static int load_link(link_config_ctx *ctx, const char *filename) {
- _cleanup_(link_config_freep) link_config *link = NULL;
- _cleanup_fclose_ FILE *file = NULL;
- int r;
-
- assert(ctx);
- assert(filename);
-
- file = fopen(filename, "re");
- if (!file) {
- if (errno == ENOENT)
- return 0;
- else
- return -errno;
- }
-
- if (null_or_empty_fd(fileno(file))) {
- log_debug("Skipping empty file: %s", filename);
- return 0;
- }
-
- link = new0(link_config, 1);
- if (!link)
- return log_oom();
-
- link->mac_policy = _MACPOLICY_INVALID;
- link->wol = _WOL_INVALID;
- link->duplex = _DUP_INVALID;
-
- r = config_parse(NULL, filename, file,
- "Match\0Link\0Ethernet\0",
- config_item_perf_lookup, link_config_gperf_lookup,
- false, false, true, link);
- if (r < 0)
- return r;
- else
- log_debug("Parsed configuration file %s", filename);
-
- link->filename = strdup(filename);
-
- LIST_PREPEND(links, ctx->links, link);
- link = NULL;
-
- return 0;
-}
-
-static bool enable_name_policy(void) {
- _cleanup_free_ char *line = NULL;
- const char *word, *state;
- int r;
- size_t l;
-
- r = proc_cmdline(&line);
- if (r < 0) {
- log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m");
- return true;
- }
-
- FOREACH_WORD_QUOTED(word, l, line, state)
- if (strneq(word, "net.ifnames=0", l))
- return false;
-
- return true;
-}
-
-int link_config_load(link_config_ctx *ctx) {
- int r;
- _cleanup_strv_free_ char **files;
- char **f;
-
- link_configs_free(ctx);
-
- if (!enable_name_policy()) {
- ctx->enable_name_policy = false;
- log_info("Network interface NamePolicy= disabled on kernel command line, ignoring.");
- }
-
- /* update timestamp */
- paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, true);
-
- r = conf_files_list_strv(&files, ".link", NULL, link_dirs);
- if (r < 0)
- return log_error_errno(r, "failed to enumerate link files: %m");
-
- STRV_FOREACH_BACKWARDS(f, files) {
- r = load_link(ctx, *f);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-bool link_config_should_reload(link_config_ctx *ctx) {
- return paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, false);
-}
-
-int link_config_get(link_config_ctx *ctx, struct udev_device *device,
- link_config **ret) {
- link_config *link;
-
- LIST_FOREACH(links, link, ctx->links) {
- const char* attr_value;
-
- attr_value = udev_device_get_sysattr_value(device, "address");
-
- if (net_match_config(link->match_mac, link->match_path, link->match_driver,
- link->match_type, link->match_name, link->match_host,
- link->match_virt, link->match_kernel, link->match_arch,
- attr_value ? ether_aton(attr_value) : NULL,
- udev_device_get_property_value(device, "ID_PATH"),
- udev_device_get_driver(udev_device_get_parent(device)),
- udev_device_get_property_value(device, "ID_NET_DRIVER"),
- udev_device_get_devtype(device),
- udev_device_get_sysname(device))) {
- if (link->match_name) {
- unsigned char name_assign_type = NET_NAME_UNKNOWN;
-
- attr_value = udev_device_get_sysattr_value(device, "name_assign_type");
- if (attr_value)
- (void) safe_atou8(attr_value, &name_assign_type);
-
- if (name_assign_type == NET_NAME_ENUM) {
- log_warning("Config file %s applies to device based on potentially unpredictable interface name '%s'",
- link->filename, udev_device_get_sysname(device));
- *ret = link;
-
- return 0;
- } else if (name_assign_type == NET_NAME_RENAMED) {
- log_warning("Config file %s matches device based on renamed interface name '%s', ignoring",
- link->filename, udev_device_get_sysname(device));
-
- continue;
- }
- }
-
- log_debug("Config file %s applies to device %s",
- link->filename, udev_device_get_sysname(device));
-
- *ret = link;
-
- return 0;
- }
- }
-
- *ret = NULL;
-
- return -ENOENT;
-}
-
-static bool mac_is_random(struct udev_device *device) {
- const char *s;
- unsigned type;
- int r;
-
- /* if we can't get the assign type, assume it is not random */
- s = udev_device_get_sysattr_value(device, "addr_assign_type");
- if (!s)
- return false;
-
- r = safe_atou(s, &type);
- if (r < 0)
- return false;
-
- return type == NET_ADDR_RANDOM;
-}
-
-static bool should_rename(struct udev_device *device, bool respect_predictable) {
- const char *s;
- unsigned type;
- int r;
-
- /* if we can't get the assgin type, assume we should rename */
- s = udev_device_get_sysattr_value(device, "name_assign_type");
- if (!s)
- return true;
-
- r = safe_atou(s, &type);
- if (r < 0)
- return true;
-
- switch (type) {
- case NET_NAME_USER:
- case NET_NAME_RENAMED:
- /* these were already named by userspace, do not touch again */
- return false;
- case NET_NAME_PREDICTABLE:
- /* the kernel claims to have given a predictable name */
- if (respect_predictable)
- return false;
- /* fall through */
- case NET_NAME_ENUM:
- default:
- /* the name is known to be bad, or of an unknown type */
- return true;
- }
-}
-
-static int get_mac(struct udev_device *device, bool want_random,
- struct ether_addr *mac) {
- int r;
-
- if (want_random)
- random_bytes(mac->ether_addr_octet, ETH_ALEN);
- else {
- uint8_t result[8];
-
- r = net_get_unique_predictable_data(device, result);
- if (r < 0)
- return r;
-
- assert_cc(ETH_ALEN <= sizeof(result));
- memcpy(mac->ether_addr_octet, result, ETH_ALEN);
- }
-
- /* see eth_random_addr in the kernel */
- mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */
- mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */
-
- return 0;
-}
-
-int link_config_apply(link_config_ctx *ctx, link_config *config,
- struct udev_device *device, const char **name) {
- const char *old_name;
- const char *new_name = NULL;
- struct ether_addr generated_mac;
- struct ether_addr *mac = NULL;
- bool respect_predictable = false;
- int r, ifindex;
-
- assert(ctx);
- assert(config);
- assert(device);
- assert(name);
-
- old_name = udev_device_get_sysname(device);
- if (!old_name)
- return -EINVAL;
-
- r = ethtool_set_speed(&ctx->ethtool_fd, old_name, config->speed / 1024,
- config->duplex);
- if (r < 0)
- log_warning_errno(r, "Could not set speed or duplex of %s to %u Mbps (%s): %m",
- old_name, config->speed / 1024,
- duplex_to_string(config->duplex));
-
- r = ethtool_set_wol(&ctx->ethtool_fd, old_name, config->wol);
- if (r < 0)
- log_warning_errno(r, "Could not set WakeOnLan of %s to %s: %m",
- old_name, wol_to_string(config->wol));
-
- ifindex = udev_device_get_ifindex(device);
- if (ifindex <= 0) {
- log_warning("Could not find ifindex");
- return -ENODEV;
- }
-
- if (ctx->enable_name_policy && config->name_policy) {
- NamePolicy *policy;
-
- for (policy = config->name_policy;
- !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {
- switch (*policy) {
- case NAMEPOLICY_KERNEL:
- respect_predictable = true;
- break;
- case NAMEPOLICY_DATABASE:
- new_name = udev_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE");
- break;
- case NAMEPOLICY_ONBOARD:
- new_name = udev_device_get_property_value(device, "ID_NET_NAME_ONBOARD");
- break;
- case NAMEPOLICY_SLOT:
- new_name = udev_device_get_property_value(device, "ID_NET_NAME_SLOT");
- break;
- case NAMEPOLICY_PATH:
- new_name = udev_device_get_property_value(device, "ID_NET_NAME_PATH");
- break;
- case NAMEPOLICY_MAC:
- new_name = udev_device_get_property_value(device, "ID_NET_NAME_MAC");
- break;
- default:
- break;
- }
- }
- }
-
- if (should_rename(device, respect_predictable)) {
- /* if not set by policy, fall back manually set name */
- if (!new_name)
- new_name = config->name;
- } else
- new_name = NULL;
-
- switch (config->mac_policy) {
- case MACPOLICY_PERSISTENT:
- if (mac_is_random(device)) {
- r = get_mac(device, false, &generated_mac);
- if (r == -ENOENT) {
- log_warning_errno(r, "Could not generate persistent MAC address for %s: %m", old_name);
- break;
- } else if (r < 0)
- return r;
- mac = &generated_mac;
- }
- break;
- case MACPOLICY_RANDOM:
- if (!mac_is_random(device)) {
- r = get_mac(device, true, &generated_mac);
- if (r == -ENOENT) {
- log_warning_errno(r, "Could not generate random MAC address for %s: %m", old_name);
- break;
- } else if (r < 0)
- return r;
- mac = &generated_mac;
- }
- break;
- default:
- mac = config->mac;
- }
-
- r = rtnl_set_link_properties(&ctx->rtnl, ifindex, config->alias, mac,
- config->mtu);
- if (r < 0)
- return log_warning_errno(r, "Could not set Alias, MACAddress or MTU on %s: %m", old_name);
-
- *name = new_name;
-
- return 0;
-}
-
-int link_get_driver(link_config_ctx *ctx, struct udev_device *device, char **ret) {
- const char *name;
- char *driver = NULL;
- int r;
-
- name = udev_device_get_sysname(device);
- if (!name)
- return -EINVAL;
-
- r = ethtool_get_driver(&ctx->ethtool_fd, name, &driver);
- if (r < 0)
- return r;
-
- *ret = driver;
- return 0;
-}
-
-static const char* const mac_policy_table[_MACPOLICY_MAX] = {
- [MACPOLICY_PERSISTENT] = "persistent",
- [MACPOLICY_RANDOM] = "random"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
-DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy,
- "Failed to parse MAC address policy");
-
-static const char* const name_policy_table[_NAMEPOLICY_MAX] = {
- [NAMEPOLICY_KERNEL] = "kernel",
- [NAMEPOLICY_DATABASE] = "database",
- [NAMEPOLICY_ONBOARD] = "onboard",
- [NAMEPOLICY_SLOT] = "slot",
- [NAMEPOLICY_PATH] = "path",
- [NAMEPOLICY_MAC] = "mac"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
-DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy,
- _NAMEPOLICY_INVALID,
- "Failed to parse interface name policy");
~ianmdlvl / elogind.git / blobdiff