843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include <netinet/ether.h>

843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <linux/netdevice.h>

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev#include "missing.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "link-config.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "ethtool-util.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "libudev-private.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "sd-rtnl.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "util.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "log.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "strv.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "path-util.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "conf-parser.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "conf-files.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "rtnl-util.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "network-internal.h"

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab#include "random-util.h"

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevstruct link_config_ctx {

843e19887f64dde75055cf8842fc4db2171eff45johnlev LIST_HEAD(link_config, links);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev int ethtool_fd;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev bool enable_name_policy;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev sd_rtnl *rtnl;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev usec_t link_dirs_ts_usec;

843e19887f64dde75055cf8842fc4db2171eff45johnlev};

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic const char* const link_dirs[] = {

843e19887f64dde75055cf8842fc4db2171eff45johnlev "/etc/systemd/network",

843e19887f64dde75055cf8842fc4db2171eff45johnlev "/run/systemd/network",

843e19887f64dde75055cf8842fc4db2171eff45johnlev "/usr/lib/systemd/network",

843e19887f64dde75055cf8842fc4db2171eff45johnlev#ifdef HAVE_SPLIT_USR

843e19887f64dde75055cf8842fc4db2171eff45johnlev "/lib/systemd/network",

843e19887f64dde75055cf8842fc4db2171eff45johnlev#endif

843e19887f64dde75055cf8842fc4db2171eff45johnlev NULL};

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic void link_config_free(link_config *link) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (!link)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->filename);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->match_mac);

843e19887f64dde75055cf8842fc4db2171eff45johnlev strv_free(link->match_path);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab strv_free(link->match_driver);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab strv_free(link->match_type);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->match_name);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->match_host);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->match_virt);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->match_kernel);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->match_arch);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->description);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->mac);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->name_policy);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->name);

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(link->alias);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab free(link);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab}

5d2eda970e48f8985448151c73e699614ce9f357John Levon

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rabDEFINE_TRIVIAL_CLEANUP_FUNC(link_config*, link_config_free);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

5d2eda970e48f8985448151c73e699614ce9f357John Levonstatic void link_configs_free(link_config_ctx *ctx) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link_config *link, *link_next;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (!ctx)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev LIST_FOREACH_SAFE(links, link, link_next, ctx->links)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link_config_free(link);

5d2eda970e48f8985448151c73e699614ce9f357John Levon}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevvoid link_config_ctx_free(link_config_ctx *ctx) {

5d2eda970e48f8985448151c73e699614ce9f357John Levon if (!ctx)

5d2eda970e48f8985448151c73e699614ce9f357John Levon return;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev safe_close(ctx->ethtool_fd);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev sd_rtnl_unref(ctx->rtnl);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev link_configs_free(ctx);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev free(ctx);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev return;

843e19887f64dde75055cf8842fc4db2171eff45johnlev}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevDEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevint link_config_ctx_new(link_config_ctx **ret) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab _cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!ret)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return -EINVAL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab ctx = new0(link_config_ctx, 1);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!ctx)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return -ENOMEM;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab LIST_HEAD_INIT(ctx->links);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab ctx->ethtool_fd = -1;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab ctx->enable_name_policy = true;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab *ret = ctx;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab ctx = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return 0;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab}

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rabstatic int load_link(link_config_ctx *ctx, const char *filename) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab _cleanup_(link_config_freep) link_config *link = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab _cleanup_fclose_ FILE *file = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab int r;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab assert(ctx);

843e19887f64dde75055cf8842fc4db2171eff45johnlev assert(filename);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev file = fopen(filename, "re");

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (!file) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (errno == ENOENT)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return 0;

843e19887f64dde75055cf8842fc4db2171eff45johnlev else

843e19887f64dde75055cf8842fc4db2171eff45johnlev return -errno;

843e19887f64dde75055cf8842fc4db2171eff45johnlev }

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (null_or_empty_fd(fileno(file))) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev log_debug("Skipping empty file: %s", filename);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return 0;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link = new0(link_config, 1);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!link)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return log_oom();

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->mac_policy = _MACPOLICY_INVALID;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->wol = _WOL_INVALID;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->duplex = _DUP_INVALID;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = config_parse(NULL, filename, file,

843e19887f64dde75055cf8842fc4db2171eff45johnlev "Match\0Link\0Ethernet\0",

843e19887f64dde75055cf8842fc4db2171eff45johnlev config_item_perf_lookup, link_config_gperf_lookup,

843e19887f64dde75055cf8842fc4db2171eff45johnlev false, false, true, link);

5d2eda970e48f8985448151c73e699614ce9f357John Levon if (r < 0)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return r;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab else

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_debug("Parsed configuration file %s", filename);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (link->mtu > UINT_MAX || link->speed > UINT_MAX)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return -ERANGE;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->filename = strdup(filename);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

843e19887f64dde75055cf8842fc4db2171eff45johnlev LIST_PREPEND(links, ctx->links, link);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

843e19887f64dde75055cf8842fc4db2171eff45johnlev return 0;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab}

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rabstatic bool enable_name_policy(void) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab _cleanup_free_ char *line = NULL;

843e19887f64dde75055cf8842fc4db2171eff45johnlev const char *word, *state;

843e19887f64dde75055cf8842fc4db2171eff45johnlev int r;

843e19887f64dde75055cf8842fc4db2171eff45johnlev size_t l;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev r = proc_cmdline(&line);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (r < 0) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return true;

843e19887f64dde75055cf8842fc4db2171eff45johnlev }

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev FOREACH_WORD_QUOTED(word, l, line, state)

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (strneq(word, "net.ifnames=0", l))

843e19887f64dde75055cf8842fc4db2171eff45johnlev return false;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev return true;

843e19887f64dde75055cf8842fc4db2171eff45johnlev}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevint link_config_load(link_config_ctx *ctx) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev int r;

843e19887f64dde75055cf8842fc4db2171eff45johnlev _cleanup_strv_free_ char **files;

843e19887f64dde75055cf8842fc4db2171eff45johnlev char **f;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev link_configs_free(ctx);

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (!enable_name_policy()) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev ctx->enable_name_policy = false;

843e19887f64dde75055cf8842fc4db2171eff45johnlev log_info("Network interface NamePolicy= disabled on kernel command line, ignoring.");

843e19887f64dde75055cf8842fc4db2171eff45johnlev }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab /* update timestamp */

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, true);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

843e19887f64dde75055cf8842fc4db2171eff45johnlev r = conf_files_list_strv(&files, ".link", NULL, link_dirs);

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (r < 0)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return log_error_errno(r, "failed to enumerate link files: %m");

843e19887f64dde75055cf8842fc4db2171eff45johnlev

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab STRV_FOREACH_BACKWARDS(f, files) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = load_link(ctx, *f);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (r < 0)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return r;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

843e19887f64dde75055cf8842fc4db2171eff45johnlev return 0;

843e19887f64dde75055cf8842fc4db2171eff45johnlev}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevbool link_config_should_reload(link_config_ctx *ctx) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev return paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, false);

843e19887f64dde75055cf8842fc4db2171eff45johnlev}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevint link_config_get(link_config_ctx *ctx, struct udev_device *device,

843e19887f64dde75055cf8842fc4db2171eff45johnlev link_config **ret) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev link_config *link;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev LIST_FOREACH(links, link, ctx->links) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev const char* attr_value;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab attr_value = udev_device_get_sysattr_value(device, "address");

843e19887f64dde75055cf8842fc4db2171eff45johnlev

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (net_match_config(link->match_mac, link->match_path, link->match_driver,

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->match_type, link->match_name, link->match_host,

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->match_virt, link->match_kernel, link->match_arch,

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab attr_value ? ether_aton(attr_value) : NULL,

843e19887f64dde75055cf8842fc4db2171eff45johnlev udev_device_get_property_value(device, "ID_PATH"),

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab udev_device_get_driver(udev_device_get_parent(device)),

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab udev_device_get_property_value(device, "ID_NET_DRIVER"),

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab udev_device_get_devtype(device),

843e19887f64dde75055cf8842fc4db2171eff45johnlev udev_device_get_sysname(device))) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (link->match_name) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab unsigned char name_assign_type = NET_NAME_UNKNOWN;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

843e19887f64dde75055cf8842fc4db2171eff45johnlev attr_value = udev_device_get_sysattr_value(device, "name_assign_type");

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (attr_value)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab (void) safe_atou8(attr_value, &name_assign_type);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (name_assign_type == NET_NAME_ENUM) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_warning("Config file %s applies to device based on potentially unpredictable interface name '%s'",

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->filename, udev_device_get_sysname(device));

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab *ret = link;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return 0;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab } else if (name_assign_type == NET_NAME_RENAMED) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_warning("Config file %s matches device based on renamed interface name '%s', ignoring",

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->filename, udev_device_get_sysname(device));

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab continue;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_debug("Config file %s applies to device %s",

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab link->filename, udev_device_get_sysname(device));

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab *ret = link;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return 0;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab *ret = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return -ENOENT;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab}

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rabstatic bool mac_is_random(struct udev_device *device) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab const char *s;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab unsigned type;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab int r;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab /* if we can't get the assign type, assume it is not random */

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab s = udev_device_get_sysattr_value(device, "addr_assign_type");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!s)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return false;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = safe_atou(s, &type);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (r < 0)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return false;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return type == NET_ADDR_RANDOM;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab}

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rabstatic bool should_rename(struct udev_device *device, bool respect_predictable) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab const char *s;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab unsigned type;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab int r;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab /* if we can't get the assgin type, assume we should rename */

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab s = udev_device_get_sysattr_value(device, "name_assign_type");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!s)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return true;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = safe_atou(s, &type);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (r < 0)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return true;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev switch (type) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev case NET_NAME_USER:

843e19887f64dde75055cf8842fc4db2171eff45johnlev case NET_NAME_RENAMED:

843e19887f64dde75055cf8842fc4db2171eff45johnlev /* these were already named by userspace, do not touch again */

843e19887f64dde75055cf8842fc4db2171eff45johnlev return false;

843e19887f64dde75055cf8842fc4db2171eff45johnlev case NET_NAME_PREDICTABLE:

843e19887f64dde75055cf8842fc4db2171eff45johnlev /* the kernel claims to have given a predictable name */

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (respect_predictable)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return false;

843e19887f64dde75055cf8842fc4db2171eff45johnlev /* fall through */

843e19887f64dde75055cf8842fc4db2171eff45johnlev case NET_NAME_ENUM:

843e19887f64dde75055cf8842fc4db2171eff45johnlev default:

843e19887f64dde75055cf8842fc4db2171eff45johnlev /* the name is known to be bad, or of an unknown type */

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return true;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int get_mac(struct udev_device *device, bool want_random,

843e19887f64dde75055cf8842fc4db2171eff45johnlev struct ether_addr *mac) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev int r;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (want_random)

843e19887f64dde75055cf8842fc4db2171eff45johnlev random_bytes(mac->ether_addr_octet, ETH_ALEN);

843e19887f64dde75055cf8842fc4db2171eff45johnlev else {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab uint8_t result[8];

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev r = net_get_unique_predictable_data(device, result);

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (r < 0)

843e19887f64dde75055cf8842fc4db2171eff45johnlev return r;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev assert_cc(ETH_ALEN <= sizeof(result));

843e19887f64dde75055cf8842fc4db2171eff45johnlev memcpy(mac->ether_addr_octet, result, ETH_ALEN);

843e19887f64dde75055cf8842fc4db2171eff45johnlev }

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev /* see eth_random_addr in the kernel */

843e19887f64dde75055cf8842fc4db2171eff45johnlev mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev return 0;

843e19887f64dde75055cf8842fc4db2171eff45johnlev}

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevint link_config_apply(link_config_ctx *ctx, link_config *config,

843e19887f64dde75055cf8842fc4db2171eff45johnlev struct udev_device *device, const char **name) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev const char *old_name;

843e19887f64dde75055cf8842fc4db2171eff45johnlev const char *new_name = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab struct ether_addr generated_mac;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab struct ether_addr *mac = NULL;

843e19887f64dde75055cf8842fc4db2171eff45johnlev bool respect_predictable = false;

843e19887f64dde75055cf8842fc4db2171eff45johnlev int r, ifindex;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev assert(ctx);

843e19887f64dde75055cf8842fc4db2171eff45johnlev assert(config);

843e19887f64dde75055cf8842fc4db2171eff45johnlev assert(device);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab assert(name);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab old_name = udev_device_get_sysname(device);

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (!old_name)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return -EINVAL;

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev r = ethtool_set_speed(&ctx->ethtool_fd, old_name, config->speed / 1024, config->duplex);

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (r < 0)

843e19887f64dde75055cf8842fc4db2171eff45johnlev log_warning_errno(r, "Could not set speed or duplex of %s to %zu Mbps (%s): %m",

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab old_name, config->speed / 1024,

843e19887f64dde75055cf8842fc4db2171eff45johnlev duplex_to_string(config->duplex));

843e19887f64dde75055cf8842fc4db2171eff45johnlev

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = ethtool_set_wol(&ctx->ethtool_fd, old_name, config->wol);

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (r < 0)

843e19887f64dde75055cf8842fc4db2171eff45johnlev log_warning_errno(r, "Could not set WakeOnLan of %s to %s: %m",

843e19887f64dde75055cf8842fc4db2171eff45johnlev old_name, wol_to_string(config->wol));

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev ifindex = udev_device_get_ifindex(device);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (ifindex <= 0) {

843e19887f64dde75055cf8842fc4db2171eff45johnlev log_warning("Could not find ifindex");

843e19887f64dde75055cf8842fc4db2171eff45johnlev return -ENODEV;

843e19887f64dde75055cf8842fc4db2171eff45johnlev }

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ctx->enable_name_policy && config->name_policy) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab NamePolicy *policy;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab for (policy = config->name_policy;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab switch (*policy) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case NAMEPOLICY_KERNEL:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab respect_predictable = true;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case NAMEPOLICY_DATABASE:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = udev_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case NAMEPOLICY_ONBOARD:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = udev_device_get_property_value(device, "ID_NET_NAME_ONBOARD");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case NAMEPOLICY_SLOT:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = udev_device_get_property_value(device, "ID_NET_NAME_SLOT");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case NAMEPOLICY_PATH:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = udev_device_get_property_value(device, "ID_NET_NAME_PATH");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case NAMEPOLICY_MAC:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = udev_device_get_property_value(device, "ID_NET_NAME_MAC");

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab default:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (should_rename(device, respect_predictable)) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab /* if not set by policy, fall back manually set name */

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!new_name)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = config->name;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab } else

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab new_name = NULL;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab switch (config->mac_policy) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case MACPOLICY_PERSISTENT:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (mac_is_random(device)) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = get_mac(device, false, &generated_mac);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (r == -ENOENT) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_warning_errno(r, "Could not generate persistent MAC address for %s: %m", old_name);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab } else if (r < 0)

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab return r;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab mac = &generated_mac;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab }

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab case MACPOLICY_RANDOM:

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (!mac_is_random(device)) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab r = get_mac(device, true, &generated_mac);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab if (r == -ENOENT) {

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab log_warning_errno(r, "Could not generate random MAC address for %s: %m", old_name);

a576ab5b6e08c47732b3dedca9eaa8a8cbb85720rab break;

5d2eda970e48f8985448151c73e699614ce9f357John Levon } else if (r < 0)

5d2eda970e48f8985448151c73e699614ce9f357John Levon return r;

5d2eda970e48f8985448151c73e699614ce9f357John Levon mac = &generated_mac;

5d2eda970e48f8985448151c73e699614ce9f357John Levon }

5d2eda970e48f8985448151c73e699614ce9f357John Levon break;

5d2eda970e48f8985448151c73e699614ce9f357John Levon default:

5d2eda970e48f8985448151c73e699614ce9f357John Levon mac = config->mac;

5d2eda970e48f8985448151c73e699614ce9f357John Levon }

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levon r = rtnl_set_link_properties(&ctx->rtnl, ifindex, config->alias, mac, config->mtu);

5d2eda970e48f8985448151c73e699614ce9f357John Levon if (r < 0)

5d2eda970e48f8985448151c73e699614ce9f357John Levon return log_warning_errno(r, "Could not set Alias, MACAddress or MTU on %s: %m", old_name);

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levon *name = new_name;

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levon return 0;

5d2eda970e48f8985448151c73e699614ce9f357John Levon}

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levonint link_get_driver(link_config_ctx *ctx, struct udev_device *device, char **ret) {

5d2eda970e48f8985448151c73e699614ce9f357John Levon const char *name;

5d2eda970e48f8985448151c73e699614ce9f357John Levon char *driver = NULL;

5d2eda970e48f8985448151c73e699614ce9f357John Levon int r;

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levon name = udev_device_get_sysname(device);

5d2eda970e48f8985448151c73e699614ce9f357John Levon if (!name)

5d2eda970e48f8985448151c73e699614ce9f357John Levon return -EINVAL;

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levon r = ethtool_get_driver(&ctx->ethtool_fd, name, &driver);

5d2eda970e48f8985448151c73e699614ce9f357John Levon if (r < 0)

5d2eda970e48f8985448151c73e699614ce9f357John Levon return r;

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levon *ret = driver;

5d2eda970e48f8985448151c73e699614ce9f357John Levon return 0;

5d2eda970e48f8985448151c73e699614ce9f357John Levon}

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levonstatic const char* const mac_policy_table[_MACPOLICY_MAX] = {

5d2eda970e48f8985448151c73e699614ce9f357John Levon [MACPOLICY_PERSISTENT] = "persistent",

5d2eda970e48f8985448151c73e699614ce9f357John Levon [MACPOLICY_RANDOM] = "random"

5d2eda970e48f8985448151c73e699614ce9f357John Levon};

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John LevonDEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);

5d2eda970e48f8985448151c73e699614ce9f357John LevonDEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy,

5d2eda970e48f8985448151c73e699614ce9f357John Levon "Failed to parse MAC address policy");

5d2eda970e48f8985448151c73e699614ce9f357John Levon

5d2eda970e48f8985448151c73e699614ce9f357John Levonstatic const char* const name_policy_table[_NAMEPOLICY_MAX] = {

5d2eda970e48f8985448151c73e699614ce9f357John Levon [NAMEPOLICY_KERNEL] = "kernel",

5d2eda970e48f8985448151c73e699614ce9f357John Levon [NAMEPOLICY_DATABASE] = "database",

5d2eda970e48f8985448151c73e699614ce9f357John Levon [NAMEPOLICY_ONBOARD] = "onboard",

5d2eda970e48f8985448151c73e699614ce9f357John Levon [NAMEPOLICY_SLOT] = "slot",

5d2eda970e48f8985448151c73e699614ce9f357John Levon [NAMEPOLICY_PATH] = "path",

5d2eda970e48f8985448151c73e699614ce9f357John Levon [NAMEPOLICY_MAC] = "mac"

843e19887f64dde75055cf8842fc4db2171eff45johnlev};

843e19887f64dde75055cf8842fc4db2171eff45johnlev

843e19887f64dde75055cf8842fc4db2171eff45johnlevDEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);

843e19887f64dde75055cf8842fc4db2171eff45johnlevDEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy,

843e19887f64dde75055cf8842fc4db2171eff45johnlev _NAMEPOLICY_INVALID,

843e19887f64dde75055cf8842fc4db2171eff45johnlev "Failed to parse interface name policy");

843e19887f64dde75055cf8842fc4db2171eff45johnlev