2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include <netinet/ether.h>

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include <linux/netdevice.h>

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "sd-id128.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "missing.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "link-config.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "ethtool-util.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "libudev-private.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "sd-rtnl.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "util.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "log.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "strv.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "path-util.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "conf-parser.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "conf-files.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "fileio.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "hashmap.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "rtnl-util.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "network-internal.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#include "siphash24.h"

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstruct link_config_ctx {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers LIST_HEAD(link_config, links);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers int ethtool_fd;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers bool enable_name_policy;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers sd_rtnl *rtnl;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers usec_t link_dirs_ts_usec;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers};

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic const char* const link_dirs[] = {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers "/etc/systemd/network",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers "/run/systemd/network",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers "/usr/lib/systemd/network",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#ifdef HAVE_SPLIT_USR

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers "/lib/systemd/network",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers#endif

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers NULL};

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic void link_config_free(link_config *link) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!link)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->filename);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_mac);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_path);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_driver);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_type);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_name);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_host);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_virt);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_kernel);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->match_arch);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->description);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->mac);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->name_policy);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->name);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link->alias);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(link);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay SieversDEFINE_TRIVIAL_CLEANUP_FUNC(link_config*, link_config_free);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic void link_configs_free(link_config_ctx *ctx) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link_config *link, *link_next;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!ctx)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers LIST_FOREACH_SAFE(links, link, link_next, ctx->links)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link_config_free(link);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversvoid link_config_ctx_free(link_config_ctx *ctx) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!ctx)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers safe_close(ctx->ethtool_fd);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers sd_rtnl_unref(ctx->rtnl);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link_configs_free(ctx);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers free(ctx);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay SieversDEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversint link_config_ctx_new(link_config_ctx **ret) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers _cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!ret)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return -EINVAL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers ctx = new0(link_config_ctx, 1);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!ctx)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return -ENOMEM;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers LIST_HEAD_INIT(ctx->links);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers ctx->ethtool_fd = -1;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers ctx->enable_name_policy = true;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers *ret = ctx;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers ctx = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic int load_link(link_config_ctx *ctx, const char *filename) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers _cleanup_(link_config_freep) link_config *link = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers _cleanup_fclose_ FILE *file = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers int r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers assert(ctx);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers assert(filename);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers file = fopen(filename, "re");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!file) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (errno == ENOENT)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers else

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return -errno;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (null_or_empty_fd(fileno(file))) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_debug("Skipping empty file: %s", filename);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link = new0(link_config, 1);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!link)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return log_oom();

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->mac_policy = _MACPOLICY_INVALID;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->wol = _WOL_INVALID;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->duplex = _DUP_INVALID;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers r = config_parse(NULL, filename, file,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers "Match\0Link\0Ethernet\0",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers config_item_perf_lookup, link_config_gperf_lookup,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers false, false, true, link);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (r < 0)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers else

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_debug("Parsed configuration file %s", filename);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->filename = strdup(filename);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers LIST_PREPEND(links, ctx->links, link);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic bool enable_name_policy(void) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers _cleanup_free_ char *line = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers const char *word, *state;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers int r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers size_t l;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers r = proc_cmdline(&line);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (r < 0) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return true;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers FOREACH_WORD_QUOTED(word, l, line, state)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (strneq(word, "net.ifnames=0", l))

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return false;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return true;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversint link_config_load(link_config_ctx *ctx) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers int r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers _cleanup_strv_free_ char **files;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers char **f;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link_configs_free(ctx);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!enable_name_policy()) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers ctx->enable_name_policy = false;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_info("Network interface NamePolicy= disabled on kernel command line, ignoring.");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers /* update timestamp */

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, true);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers r = conf_files_list_strv(&files, ".link", NULL, link_dirs);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (r < 0)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return log_error_errno(r, "failed to enumerate link files: %m");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers STRV_FOREACH_BACKWARDS(f, files) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers r = load_link(ctx, *f);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (r < 0)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversbool link_config_should_reload(link_config_ctx *ctx) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, false);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversint link_config_get(link_config_ctx *ctx, struct udev_device *device,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link_config **ret) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link_config *link;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers LIST_FOREACH(links, link, ctx->links) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers const char* attr_value;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers attr_value = udev_device_get_sysattr_value(device, "address");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (net_match_config(link->match_mac, link->match_path, link->match_driver,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->match_type, link->match_name, link->match_host,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->match_virt, link->match_kernel, link->match_arch,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers attr_value ? ether_aton(attr_value) : NULL,

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers udev_device_get_property_value(device, "ID_PATH"),

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers udev_device_get_driver(udev_device_get_parent(device)),

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers udev_device_get_property_value(device, "ID_NET_DRIVER"),

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers udev_device_get_devtype(device),

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers udev_device_get_sysname(device))) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (link->match_name) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers unsigned char name_assign_type = NET_NAME_UNKNOWN;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers attr_value = udev_device_get_sysattr_value(device, "name_assign_type");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (attr_value)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers (void)safe_atou8(attr_value, &name_assign_type);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (name_assign_type == NET_NAME_ENUM) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_warning("Config file %s applies to device based on potentially unpredictable interface name '%s'",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->filename, udev_device_get_sysname(device));

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers *ret = link;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers } else if (name_assign_type == NET_NAME_RENAMED) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_warning("Config file %s matches device based on renamed interface name '%s', ignoring",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->filename, udev_device_get_sysname(device));

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers continue;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers log_debug("Config file %s applies to device %s",

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers link->filename, udev_device_get_sysname(device));

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers *ret = link;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return 0;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers }

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers *ret = NULL;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return -ENOENT;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic bool mac_is_random(struct udev_device *device) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers const char *s;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers unsigned type;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers int r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers /* if we can't get the assign type, assume it is not random */

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers s = udev_device_get_sysattr_value(device, "addr_assign_type");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!s)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return false;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers r = safe_atou(s, &type);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (r < 0)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return false;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return type == NET_ADDR_RANDOM;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers}

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sieversstatic bool should_rename(struct udev_device *device, bool respect_predictable) {

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers const char *s;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers unsigned type;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers int r;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers /* if we can't get the assgin type, assume we should rename */

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers s = udev_device_get_sysattr_value(device, "name_assign_type");

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (!s)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return true;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers r = safe_atou(s, &type);

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers if (r < 0)

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers return true;

2f8d336478536af789d654599f9523d02e0ca693Kay Sievers

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)

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)

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;

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");