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NetworkManager/src/platform/nm-platform-utils.c

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* nm-platform.c - Handle runtime kernel networking configuration
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2015 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nm-platform-utils.h"
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <linux/mii.h>
#include <linux/if.h>
#include <linux/version.h>
#include <linux/rtnetlink.h>
#include <fcntl.h>
#include <libudev.h>
#include "nm-utils.h"
#include "nm-setting-wired.h"
#include "nm-ethtool-utils.h"
#include "nm-core-utils.h"
#define ONOFF(bool_val) ((bool_val) ? "on" : "off")
/******************************************************************************
* utils
*****************************************************************************/
extern char *if_indextoname (unsigned __ifindex, char *__ifname);
unsigned if_nametoindex (const char *__ifname);
const char *
nmp_utils_if_indextoname (int ifindex, char *out_ifname/*IFNAMSIZ*/)
{
g_return_val_if_fail (ifindex > 0, NULL);
g_return_val_if_fail (out_ifname, NULL);
return if_indextoname (ifindex, out_ifname);
}
int
nmp_utils_if_nametoindex (const char *ifname)
{
g_return_val_if_fail (ifname, 0);
return if_nametoindex (ifname);
}
/*****************************************************************************/
typedef struct {
int fd;
int ifindex;
char ifname[IFNAMSIZ];
} SocketHandle;
static int
socket_handle_init (SocketHandle *shandle, int ifindex)
{
if (!nmp_utils_if_indextoname (ifindex, shandle->ifname)) {
shandle->ifindex = 0;
return -ENODEV;
}
shandle->fd = socket (PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (shandle->fd < 0) {
shandle->ifindex = 0;
return -NM_ERRNO_NATIVE (errno);
}
shandle->ifindex = ifindex;
return 0;
}
static void
socket_handle_destroy (SocketHandle *shandle)
{
if (shandle->ifindex) {
shandle->ifindex = 0;
nm_close (shandle->fd);
}
}
#define nm_auto_socket_handle nm_auto(socket_handle_destroy)
/******************************************************************************
* ethtool
*****************************************************************************/
NM_UTILS_ENUM2STR_DEFINE_STATIC (_ethtool_cmd_to_string, guint32,
NM_UTILS_ENUM2STR (ETHTOOL_GDRVINFO, "ETHTOOL_GDRVINFO"),
NM_UTILS_ENUM2STR (ETHTOOL_GFEATURES, "ETHTOOL_GFEATURES"),
NM_UTILS_ENUM2STR (ETHTOOL_GLINK, "ETHTOOL_GLINK"),
NM_UTILS_ENUM2STR (ETHTOOL_GPERMADDR, "ETHTOOL_GPERMADDR"),
NM_UTILS_ENUM2STR (ETHTOOL_GSET, "ETHTOOL_GSET"),
NM_UTILS_ENUM2STR (ETHTOOL_GSSET_INFO, "ETHTOOL_GSSET_INFO"),
NM_UTILS_ENUM2STR (ETHTOOL_GSTATS, "ETHTOOL_GSTATS"),
NM_UTILS_ENUM2STR (ETHTOOL_GSTRINGS, "ETHTOOL_GSTRINGS"),
NM_UTILS_ENUM2STR (ETHTOOL_GWOL, "ETHTOOL_GWOL"),
NM_UTILS_ENUM2STR (ETHTOOL_SFEATURES, "ETHTOOL_SFEATURES"),
NM_UTILS_ENUM2STR (ETHTOOL_SSET, "ETHTOOL_SSET"),
NM_UTILS_ENUM2STR (ETHTOOL_SWOL, "ETHTOOL_SWOL"),
);
static const char *
_ethtool_data_to_string (gconstpointer edata, char *buf, gsize len)
{
return _ethtool_cmd_to_string (*((guint32 *) edata), buf, len);
}
/*****************************************************************************/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
#define ethtool_cmd_speed(pedata) ((pedata)->speed)
#define ethtool_cmd_speed_set(pedata, speed) \
G_STMT_START { (pedata)->speed = (guint16) (speed); } G_STMT_END
#endif
static int
ethtool_call_handle (SocketHandle *shandle, gpointer edata)
{
struct ifreq ifr = {
.ifr_data = edata,
};
char sbuf[50];
int errsv;
nm_assert (shandle);
nm_assert (shandle->ifindex);
nm_assert (shandle->ifname[0]);
nm_assert (strlen (shandle->ifname) < IFNAMSIZ);
nm_assert (edata);
memcpy (ifr.ifr_name, shandle->ifname, IFNAMSIZ);
if (ioctl (shandle->fd, SIOCETHTOOL, &ifr) < 0) {
errsv = errno;
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s, %s: failed: %s",
shandle->ifindex,
_ethtool_data_to_string (edata, sbuf, sizeof (sbuf)),
shandle->ifname,
nm_strerror_native (errsv));
return -NM_ERRNO_NATIVE (errsv);
}
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s, %s: success",
shandle->ifindex,
_ethtool_data_to_string (edata, sbuf, sizeof (sbuf)),
shandle->ifname);
return 0;
}
static int
ethtool_call_ifindex (int ifindex, gpointer edata)
{
nm_auto_socket_handle SocketHandle shandle = { };
int r;
char sbuf[50];
nm_assert (edata);
if ((r = socket_handle_init (&shandle, ifindex)) < 0) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failed creating ethtool socket: %s",
ifindex,
_ethtool_data_to_string (edata, sbuf, sizeof (sbuf)),
nm_strerror_native (-r));
return r;
}
return ethtool_call_handle (&shandle, edata);
}
/*****************************************************************************/
static struct ethtool_gstrings *
ethtool_get_stringset (SocketHandle *shandle, int stringset_id)
{
struct {
struct ethtool_sset_info info;
guint32 sentinel;
} sset_info = { };
gs_free struct ethtool_gstrings *gstrings = NULL;
guint32 i, len;
sset_info.info.cmd = ETHTOOL_GSSET_INFO;
sset_info.info.reserved = 0;
sset_info.info.sset_mask = (1ULL << stringset_id);
if (ethtool_call_handle (shandle, &sset_info) < 0)
return NULL;
if (!sset_info.info.sset_mask)
return NULL;
len = sset_info.info.data[0];
gstrings = g_malloc0 (sizeof (*gstrings) + (len * ETH_GSTRING_LEN));
gstrings->cmd = ETHTOOL_GSTRINGS;
gstrings->string_set = stringset_id;
gstrings->len = len;
if (gstrings->len > 0) {
if (ethtool_call_handle (shandle, gstrings) < 0)
return NULL;
for (i = 0; i < gstrings->len; i++) {
/* ensure NUL terminated */
gstrings->data[i * ETH_GSTRING_LEN + (ETH_GSTRING_LEN - 1)] = '\0';
}
}
return g_steal_pointer (&gstrings);
}
static int
ethtool_gstrings_find (const struct ethtool_gstrings *gstrings, const char *needle)
{
guint32 i;
/* ethtool_get_stringset() always ensures NUL terminated strings at ETH_GSTRING_LEN.
* that means, we cannot possibly request longer names. */
nm_assert (needle && strlen (needle) < ETH_GSTRING_LEN);
for (i = 0; i < gstrings->len; i++) {
if (nm_streq ((char *) &gstrings->data[i * ETH_GSTRING_LEN], needle))
return i;
}
return -1;
}
static int
ethtool_get_stringset_index (SocketHandle *shandle, int stringset_id, const char *needle)
{
gs_free struct ethtool_gstrings *gstrings = NULL;
/* ethtool_get_stringset() always ensures NUL terminated strings at ETH_GSTRING_LEN.
* that means, we cannot possibly request longer names. */
nm_assert (needle && strlen (needle) < ETH_GSTRING_LEN);
gstrings = ethtool_get_stringset (shandle, stringset_id);
if (gstrings)
return ethtool_gstrings_find (gstrings, needle);
return -1;
}
/*****************************************************************************/
static const NMEthtoolFeatureInfo _ethtool_feature_infos[_NM_ETHTOOL_ID_FEATURE_NUM] = {
#define ETHT_FEAT(eid, ...) \
{ \
.ethtool_id = eid, \
.n_kernel_names = NM_NARG (__VA_ARGS__), \
.kernel_names = ((const char *const[]) { __VA_ARGS__ }), \
}
/* the order does only matter for one thing: if it happens that more than one NMEthtoolID
* reference the same kernel-name, then the one that is mentioned *later* will win in
* case these NMEthtoolIDs are set. That mostly only makes sense for ethtool-ids which
* refer to multiple features ("feature-tso"), while also having more specific ids
* ("feature-tx-tcp-segmentation"). */
/* names from ethtool utility, which are aliases for multiple features. */
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_SG, "tx-scatter-gather",
"tx-scatter-gather-fraglist"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TSO, "tx-tcp-segmentation",
"tx-tcp-ecn-segmentation",
"tx-tcp-mangleid-segmentation",
"tx-tcp6-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX, "tx-checksum-ipv4",
"tx-checksum-ip-generic",
"tx-checksum-ipv6",
"tx-checksum-fcoe-crc",
"tx-checksum-sctp"),
/* names from ethtool utility, which are aliases for one feature. */
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_GRO, "rx-gro"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_GSO, "tx-generic-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_LRO, "rx-lro"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_NTUPLE, "rx-ntuple-filter"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX, "rx-checksum"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RXHASH, "rx-hashing"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RXVLAN, "rx-vlan-hw-parse"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TXVLAN, "tx-vlan-hw-insert"),
/* names of features, as known by kernel. */
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_ESP_HW_OFFLOAD, "esp-hw-offload"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_ESP_TX_CSUM_HW_OFFLOAD, "esp-tx-csum-hw-offload"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_FCOE_MTU, "fcoe-mtu"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_HIGHDMA, "highdma"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_HW_TC_OFFLOAD, "hw-tc-offload"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_L2_FWD_OFFLOAD, "l2-fwd-offload"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_LOOPBACK, "loopback"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_ALL, "rx-all"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_FCS, "rx-fcs"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_GRO_HW, "rx-gro-hw"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_UDP_TUNNEL_PORT_OFFLOAD, "rx-udp_tunnel-port-offload"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_VLAN_FILTER, "rx-vlan-filter"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_VLAN_STAG_FILTER, "rx-vlan-stag-filter"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_RX_VLAN_STAG_HW_PARSE, "rx-vlan-stag-hw-parse"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TLS_HW_RECORD, "tls-hw-record"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TLS_HW_TX_OFFLOAD, "tls-hw-tx-offload"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_CHECKSUM_FCOE_CRC, "tx-checksum-fcoe-crc"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_CHECKSUM_IPV4, "tx-checksum-ipv4"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_CHECKSUM_IPV6, "tx-checksum-ipv6"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_CHECKSUM_IP_GENERIC, "tx-checksum-ip-generic"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_CHECKSUM_SCTP, "tx-checksum-sctp"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_ESP_SEGMENTATION, "tx-esp-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_FCOE_SEGMENTATION, "tx-fcoe-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_GRE_CSUM_SEGMENTATION, "tx-gre-csum-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_GRE_SEGMENTATION, "tx-gre-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_GSO_PARTIAL, "tx-gso-partial"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_GSO_ROBUST, "tx-gso-robust"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_IPXIP4_SEGMENTATION, "tx-ipxip4-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_IPXIP6_SEGMENTATION, "tx-ipxip6-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_NOCACHE_COPY, "tx-nocache-copy"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_SCATTER_GATHER, "tx-scatter-gather"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_SCATTER_GATHER_FRAGLIST, "tx-scatter-gather-fraglist"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_SCTP_SEGMENTATION, "tx-sctp-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_TCP6_SEGMENTATION, "tx-tcp6-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_TCP_ECN_SEGMENTATION, "tx-tcp-ecn-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_TCP_MANGLEID_SEGMENTATION, "tx-tcp-mangleid-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_TCP_SEGMENTATION, "tx-tcp-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_UDP_SEGMENTATION, "tx-udp-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_UDP_TNL_CSUM_SEGMENTATION, "tx-udp_tnl-csum-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_UDP_TNL_SEGMENTATION, "tx-udp_tnl-segmentation"),
ETHT_FEAT (NM_ETHTOOL_ID_FEATURE_TX_VLAN_STAG_HW_INSERT, "tx-vlan-stag-hw-insert"),
};
/* the number of kernel features that we handle. It essentially is the sum of all
* kernel_names. So, all ethtool-ids that reference exactly one kernel-name
* (_NM_ETHTOOL_ID_FEATURE_NUM) + some extra, for ethtool-ids that are aliases
* for multiple kernel-names. */
#define N_ETHTOOL_KERNEL_FEATURES (((guint) _NM_ETHTOOL_ID_FEATURE_NUM) + 8u)
static void
_ASSERT_ethtool_feature_infos (void)
{
#if NM_MORE_ASSERTS > 10
guint i, k, n;
bool found[_NM_ETHTOOL_ID_FEATURE_NUM] = { };
G_STATIC_ASSERT_EXPR (G_N_ELEMENTS (_ethtool_feature_infos) == _NM_ETHTOOL_ID_FEATURE_NUM);
n = 0;
for (i = 0; i < G_N_ELEMENTS (_ethtool_feature_infos); i++) {
NMEthtoolFeatureState kstate;
const NMEthtoolFeatureInfo *inf = &_ethtool_feature_infos[i];
g_assert (inf->ethtool_id >= _NM_ETHTOOL_ID_FEATURE_FIRST);
g_assert (inf->ethtool_id <= _NM_ETHTOOL_ID_FEATURE_LAST);
g_assert (inf->n_kernel_names > 0);
for (k = 0; k < i; k++)
g_assert (inf->ethtool_id != _ethtool_feature_infos[k].ethtool_id);
g_assert (!found[inf->ethtool_id - _NM_ETHTOOL_ID_FEATURE_FIRST]);
found[inf->ethtool_id - _NM_ETHTOOL_ID_FEATURE_FIRST] = TRUE;
kstate.idx_kernel_name = inf->n_kernel_names - 1;
g_assert ((guint) kstate.idx_kernel_name == (guint) (inf->n_kernel_names - 1));
n += inf->n_kernel_names;
for (k = 0; k < inf->n_kernel_names; k++) {
g_assert (nm_utils_strv_find_first ((char **) inf->kernel_names,
k,
inf->kernel_names[k]) < 0);
}
}
for (i = 0; i < _NM_ETHTOOL_ID_FEATURE_NUM; i++)
g_assert (found[i]);
g_assert (n == N_ETHTOOL_KERNEL_FEATURES);
#endif
}
static NMEthtoolFeatureStates *
ethtool_get_features (SocketHandle *shandle)
{
gs_free NMEthtoolFeatureStates *states = NULL;
gs_free struct ethtool_gstrings *ss_features = NULL;
_ASSERT_ethtool_feature_infos ();
ss_features = ethtool_get_stringset (shandle, ETH_SS_FEATURES);
if (!ss_features)
return NULL;
if (ss_features->len > 0) {
gs_free struct ethtool_gfeatures *gfeatures = NULL;
guint idx;
const NMEthtoolFeatureState *states_list0 = NULL;
const NMEthtoolFeatureState *const*states_plist0 = NULL;
guint states_plist_n = 0;
gfeatures = g_malloc0 ( sizeof (struct ethtool_gfeatures)
+ (NM_DIV_ROUND_UP (ss_features->len, 32u) * sizeof(gfeatures->features[0])));
gfeatures->cmd = ETHTOOL_GFEATURES;
gfeatures->size = NM_DIV_ROUND_UP (ss_features->len, 32u);
if (ethtool_call_handle (shandle, gfeatures) < 0)
return NULL;
for (idx = 0; idx < G_N_ELEMENTS (_ethtool_feature_infos); idx++) {
const NMEthtoolFeatureInfo *info = &_ethtool_feature_infos[idx];
guint idx_kernel_name;
for (idx_kernel_name = 0; idx_kernel_name < info->n_kernel_names; idx_kernel_name++) {
NMEthtoolFeatureState *kstate;
const char *kernel_name = info->kernel_names[idx_kernel_name];
int i_feature;
guint i_block;
guint32 i_flag;
i_feature = ethtool_gstrings_find (ss_features, kernel_name);
if (i_feature < 0)
continue;
i_block = ((guint) i_feature) / 32u;
i_flag = (guint32) (1u << (((guint) i_feature) % 32u));
if (!states) {
states = g_malloc0 (sizeof (NMEthtoolFeatureStates)
+ (N_ETHTOOL_KERNEL_FEATURES * sizeof (NMEthtoolFeatureState))
+ ((N_ETHTOOL_KERNEL_FEATURES + G_N_ELEMENTS (_ethtool_feature_infos)) * sizeof (NMEthtoolFeatureState *)));
states_list0 = &states->states_list[0];
states_plist0 = (gpointer) &states_list0[N_ETHTOOL_KERNEL_FEATURES];
states->n_ss_features = ss_features->len;
}
nm_assert (states->n_states < N_ETHTOOL_KERNEL_FEATURES);
kstate = (NMEthtoolFeatureState *) &states_list0[states->n_states];
states->n_states++;
kstate->info = info;
kstate->idx_ss_features = i_feature;
kstate->idx_kernel_name = idx_kernel_name;
kstate->available = !!(gfeatures->features[i_block].available & i_flag);
kstate->requested = !!(gfeatures->features[i_block].requested & i_flag);
kstate->active = !!(gfeatures->features[i_block].active & i_flag);
kstate->never_changed = !!(gfeatures->features[i_block].never_changed & i_flag);
nm_assert (states_plist_n < N_ETHTOOL_KERNEL_FEATURES + G_N_ELEMENTS (_ethtool_feature_infos));
if (!states->states_indexed[info->ethtool_id - _NM_ETHTOOL_ID_FEATURE_FIRST])
states->states_indexed[info->ethtool_id - _NM_ETHTOOL_ID_FEATURE_FIRST] = &states_plist0[states_plist_n];
((const NMEthtoolFeatureState **) states_plist0)[states_plist_n] = kstate;
states_plist_n++;
}
if (states && states->states_indexed[info->ethtool_id - _NM_ETHTOOL_ID_FEATURE_FIRST]) {
nm_assert (states_plist_n < N_ETHTOOL_KERNEL_FEATURES + G_N_ELEMENTS (_ethtool_feature_infos));
nm_assert (!states_plist0[states_plist_n]);
states_plist_n++;
}
}
}
return g_steal_pointer (&states);
}
NMEthtoolFeatureStates *
nmp_utils_ethtool_get_features (int ifindex)
{
nm_auto_socket_handle SocketHandle shandle = { };
NMEthtoolFeatureStates *features;
int r;
g_return_val_if_fail (ifindex > 0, 0);
if ((r = socket_handle_init (&shandle, ifindex)) < 0) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failed creating ethtool socket: %s",
ifindex,
"get-features",
nm_strerror_native (-r));
return FALSE;
}
features = ethtool_get_features (&shandle);
if (!features) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failure getting features",
ifindex,
"get-features");
return NULL;
}
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: retrieved kernel features",
ifindex,
"get-features");
return features;
}
static const char *
_ethtool_feature_state_to_string (char *buf, gsize buf_size, const NMEthtoolFeatureState *s, const char *prefix)
{
int l;
l = g_snprintf (buf, buf_size,
"%s %s%s",
prefix ?: "",
ONOFF (s->active),
(!s->available || s->never_changed)
? ", [fixed]"
: ((s->requested != s->active)
? (s->requested ? ", [requested on]" : ", [requested off]")
: ""));
nm_assert (l < buf_size);
return buf;
}
gboolean
nmp_utils_ethtool_set_features (int ifindex,
const NMEthtoolFeatureStates *features,
const NMTernary *requested /* indexed by NMEthtoolID - _NM_ETHTOOL_ID_FEATURE_FIRST */,
gboolean do_set /* or reset */)
{
nm_auto_socket_handle SocketHandle shandle = { };
gs_free struct ethtool_sfeatures *sfeatures = NULL;
int r;
guint i, j;
struct {
const NMEthtoolFeatureState *f_state;
NMTernary requested;
} set_states[N_ETHTOOL_KERNEL_FEATURES];
guint set_states_n = 0;
gboolean success = TRUE;
g_return_val_if_fail (ifindex > 0, 0);
g_return_val_if_fail (features, 0);
g_return_val_if_fail (requested, 0);
nm_assert (features->n_states <= N_ETHTOOL_KERNEL_FEATURES);
for (i = 0; i < _NM_ETHTOOL_ID_FEATURE_NUM; i++) {
const NMEthtoolFeatureState *const*states_indexed;
if (requested[i] == NM_TERNARY_DEFAULT)
continue;
if (!(states_indexed = features->states_indexed[i])) {
if (do_set) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: set feature %s: skip (not found)",
ifindex,
"set-features",
nm_ethtool_data[i + _NM_ETHTOOL_ID_FEATURE_FIRST]->optname);
success = FALSE;
}
continue;
}
for (j = 0; states_indexed[j]; j++) {
const NMEthtoolFeatureState *s = states_indexed[j];
char sbuf[255];
if (set_states_n >= G_N_ELEMENTS (set_states))
g_return_val_if_reached (FALSE);
if (s->never_changed) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: %s feature %s (%s): %s, %s (skip feature marked as never changed)",
ifindex,
"set-features",
do_set ? "set" : "reset",
nm_ethtool_data[i + _NM_ETHTOOL_ID_FEATURE_FIRST]->optname,
s->info->kernel_names[s->idx_kernel_name],
ONOFF (do_set ? requested[i] == NM_TERNARY_TRUE : s->active),
_ethtool_feature_state_to_string (sbuf, sizeof (sbuf), s, do_set ? " currently:" : " before:"));
continue;
}
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: %s feature %s (%s): %s, %s",
ifindex,
"set-features",
do_set ? "set" : "reset",
nm_ethtool_data[i + _NM_ETHTOOL_ID_FEATURE_FIRST]->optname,
s->info->kernel_names[s->idx_kernel_name],
ONOFF (do_set ? requested[i] == NM_TERNARY_TRUE : s->active),
_ethtool_feature_state_to_string (sbuf, sizeof (sbuf), s, do_set ? " currently:" : " before:"));
if ( do_set
&& (!s->available || s->never_changed)
&& (s->active != (requested[i] == NM_TERNARY_TRUE))) {
/* we request to change a flag which kernel reported as fixed.
* While the ethtool operation will silently succeed, mark the request
* as failure. */
success = FALSE;
}
set_states[set_states_n].f_state = s;
set_states[set_states_n].requested = requested[i];
set_states_n++;
}
}
if (set_states_n == 0) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: no feature requested",
ifindex,
"set-features");
return TRUE;
}
if ((r = socket_handle_init (&shandle, ifindex)) < 0) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failed creating ethtool socket: %s",
ifindex,
"set-features",
nm_strerror_native (-r));
return FALSE;
}
sfeatures = g_malloc0 (sizeof (struct ethtool_sfeatures)
+ (NM_DIV_ROUND_UP (features->n_ss_features, 32U) * sizeof(sfeatures->features[0])));
sfeatures->cmd = ETHTOOL_SFEATURES;
sfeatures->size = NM_DIV_ROUND_UP (features->n_ss_features, 32U);
for (i = 0; i < set_states_n; i++) {
const NMEthtoolFeatureState *s = set_states[i].f_state;
guint i_block;
guint32 i_flag;
gboolean is_requested;
i_block = s->idx_ss_features / 32u;
i_flag = (guint32) (1u << (s->idx_ss_features % 32u));
sfeatures->features[i_block].valid |= i_flag;
if (do_set)
is_requested = (set_states[i].requested == NM_TERNARY_TRUE);
else
is_requested = s->active;
if (is_requested)
sfeatures->features[i_block].requested |= i_flag;
else
sfeatures->features[i_block].requested &= ~i_flag;
}
if ((r = ethtool_call_handle (&shandle, sfeatures)) < 0) {
success = FALSE;
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failure setting features (%s)",
ifindex,
"set-features",
nm_strerror_native (-r));
return FALSE;
}
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: %s",
ifindex,
"set-features",
success
? "successfully setting features"
: "at least some of the features were not successfully set");
return success;
}
/*****************************************************************************/
gboolean
nmp_utils_ethtool_get_driver_info (int ifindex,
NMPUtilsEthtoolDriverInfo *data)
{
struct ethtool_drvinfo *drvinfo;
G_STATIC_ASSERT_EXPR (sizeof (*data) == sizeof (*drvinfo));
G_STATIC_ASSERT_EXPR (offsetof (NMPUtilsEthtoolDriverInfo, driver) == offsetof (struct ethtool_drvinfo, driver));
G_STATIC_ASSERT_EXPR (offsetof (NMPUtilsEthtoolDriverInfo, version) == offsetof (struct ethtool_drvinfo, version));
G_STATIC_ASSERT_EXPR (offsetof (NMPUtilsEthtoolDriverInfo, fw_version) == offsetof (struct ethtool_drvinfo, fw_version));
G_STATIC_ASSERT_EXPR (sizeof (data->driver) == sizeof (drvinfo->driver));
G_STATIC_ASSERT_EXPR (sizeof (data->version) == sizeof (drvinfo->version));
G_STATIC_ASSERT_EXPR (sizeof (data->fw_version) == sizeof (drvinfo->fw_version));
g_return_val_if_fail (ifindex > 0, FALSE);
g_return_val_if_fail (data, FALSE);
drvinfo = (struct ethtool_drvinfo *) data;
memset (drvinfo, 0, sizeof (*drvinfo));
drvinfo->cmd = ETHTOOL_GDRVINFO;
return ethtool_call_ifindex (ifindex, drvinfo) >= 0;
}
gboolean
nmp_utils_ethtool_get_permanent_address (int ifindex,
guint8 *buf,
size_t *length)
{
struct {
struct ethtool_perm_addr e;
guint8 _extra_data[NM_UTILS_HWADDR_LEN_MAX + 1];
} edata;
guint i;
g_return_val_if_fail (ifindex > 0, FALSE);
memset (&edata, 0, sizeof (edata));
edata.e.cmd = ETHTOOL_GPERMADDR;
edata.e.size = NM_UTILS_HWADDR_LEN_MAX;
if (ethtool_call_ifindex (ifindex, &edata.e) < 0)
return FALSE;
if (edata.e.size > NM_UTILS_HWADDR_LEN_MAX)
return FALSE;
if (edata.e.size < 1)
return FALSE;
if (NM_IN_SET (edata.e.data[0], 0, 0xFF)) {
/* Some drivers might return a permanent address of all zeros.
* Reject that (rh#1264024)
*
* Some drivers return a permanent address of all ones. Reject that too */
for (i = 1; i < edata.e.size; i++) {
if (edata.e.data[0] != edata.e.data[i])
goto not_all_0or1;
}
return FALSE;
}
not_all_0or1:
memcpy (buf, edata.e.data, edata.e.size);
*length = edata.e.size;
return TRUE;
}
gboolean
nmp_utils_ethtool_supports_carrier_detect (int ifindex)
{
struct ethtool_cmd edata = { .cmd = ETHTOOL_GLINK };
g_return_val_if_fail (ifindex > 0, FALSE);
/* We ignore the result. If the ETHTOOL_GLINK call succeeded, then we
* assume the device supports carrier-detect, otherwise we assume it
* doesn't.
*/
return ethtool_call_ifindex (ifindex, &edata) >= 0;
}
gboolean
nmp_utils_ethtool_supports_vlans (int ifindex)
{
nm_auto_socket_handle SocketHandle shandle = { };
int r;
gs_free struct ethtool_gfeatures *features = NULL;
int idx, block, bit, size;
g_return_val_if_fail (ifindex > 0, FALSE);
if ((r = socket_handle_init (&shandle, ifindex)) < 0) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failed creating ethtool socket: %s",
ifindex,
"support-vlans",
nm_strerror_native (-r));
return FALSE;
}
idx = ethtool_get_stringset_index (&shandle, ETH_SS_FEATURES, "vlan-challenged");
if (idx < 0) {
nm_log_dbg (LOGD_PLATFORM, "ethtool[%d]: vlan-challenged ethtool feature does not exist?", ifindex);
return FALSE;
}
block = idx / 32;
bit = idx % 32;
size = block + 1;
features = g_malloc0 (sizeof (*features) + size * sizeof (struct ethtool_get_features_block));
features->cmd = ETHTOOL_GFEATURES;
features->size = size;
if (ethtool_call_handle (&shandle, features) < 0)
return FALSE;
return !(features->features[block].active & (1 << bit));
}
int
nmp_utils_ethtool_get_peer_ifindex (int ifindex)
{
nm_auto_socket_handle SocketHandle shandle = { };
int r;
gs_free struct ethtool_stats *stats = NULL;
int peer_ifindex_stat;
g_return_val_if_fail (ifindex > 0, 0);
if ((r = socket_handle_init (&shandle, ifindex)) < 0) {
nm_log_trace (LOGD_PLATFORM, "ethtool[%d]: %s: failed creating ethtool socket: %s",
ifindex,
"get-peer-ifindex",
nm_strerror_native (-r));
return FALSE;
}
peer_ifindex_stat = ethtool_get_stringset_index (&shandle, ETH_SS_STATS, "peer_ifindex");
if (peer_ifindex_stat < 0) {
nm_log_dbg (LOGD_PLATFORM, "ethtool[%d]: peer_ifindex stat does not exist?", ifindex);
return FALSE;
}
stats = g_malloc0 (sizeof (*stats) + (peer_ifindex_stat + 1) * sizeof (guint64));
stats->cmd = ETHTOOL_GSTATS;
stats->n_stats = peer_ifindex_stat + 1;
if (ethtool_call_ifindex (ifindex, stats) < 0)
return 0;
return stats->data[peer_ifindex_stat];
}
gboolean
nmp_utils_ethtool_get_wake_on_lan (int ifindex)
{
struct ethtool_wolinfo wol;
g_return_val_if_fail (ifindex > 0, FALSE);
memset (&wol, 0, sizeof (wol));
wol.cmd = ETHTOOL_GWOL;
if (ethtool_call_ifindex (ifindex, &wol) < 0)
return FALSE;
return wol.wolopts != 0;
}
gboolean
nmp_utils_ethtool_get_link_settings (int ifindex,
gboolean *out_autoneg,
guint32 *out_speed,
NMPlatformLinkDuplexType *out_duplex)
{
struct ethtool_cmd edata = {
.cmd = ETHTOOL_GSET,
};
g_return_val_if_fail (ifindex > 0, FALSE);
if (ethtool_call_ifindex (ifindex, &edata) < 0)
return FALSE;
if (out_autoneg)
*out_autoneg = (edata.autoneg == AUTONEG_ENABLE);
if (out_speed) {
guint32 speed;
speed = ethtool_cmd_speed (&edata);
if (speed == G_MAXUINT16 || speed == G_MAXUINT32)
speed = 0;
*out_speed = speed;
}
if (out_duplex) {
switch (edata.duplex) {
case DUPLEX_HALF:
*out_duplex = NM_PLATFORM_LINK_DUPLEX_HALF;
break;
case DUPLEX_FULL:
*out_duplex = NM_PLATFORM_LINK_DUPLEX_FULL;
break;
default: /* DUPLEX_UNKNOWN */
*out_duplex = NM_PLATFORM_LINK_DUPLEX_UNKNOWN;
break;
}
}
return TRUE;
}
#define ADVERTISED_INVALID 0
#define BASET_ALL_MODES ( ADVERTISED_10baseT_Half \
| ADVERTISED_10baseT_Full \
| ADVERTISED_100baseT_Half \
| ADVERTISED_100baseT_Full \
| ADVERTISED_1000baseT_Half \
| ADVERTISED_1000baseT_Full \
| ADVERTISED_10000baseT_Full )
static guint32
get_baset_mode (guint32 speed, NMPlatformLinkDuplexType duplex)
{
if (duplex == NM_PLATFORM_LINK_DUPLEX_UNKNOWN)
return ADVERTISED_INVALID;
if (duplex == NM_PLATFORM_LINK_DUPLEX_HALF) {
switch (speed) {
case 10: return ADVERTISED_10baseT_Half;
case 100: return ADVERTISED_100baseT_Half;
case 1000: return ADVERTISED_1000baseT_Half;
default: return ADVERTISED_INVALID;
}
} else {
switch (speed) {
case 10: return ADVERTISED_10baseT_Full;
case 100: return ADVERTISED_100baseT_Full;
case 1000: return ADVERTISED_1000baseT_Full;
case 10000: return ADVERTISED_10000baseT_Full;
default: return ADVERTISED_INVALID;
}
}
}
gboolean
nmp_utils_ethtool_set_link_settings (int ifindex,
gboolean autoneg,
guint32 speed,
NMPlatformLinkDuplexType duplex)
{
struct ethtool_cmd edata = {
.cmd = ETHTOOL_GSET,
};
g_return_val_if_fail (ifindex > 0, FALSE);
g_return_val_if_fail ( (speed && duplex != NM_PLATFORM_LINK_DUPLEX_UNKNOWN)
|| (!speed && duplex == NM_PLATFORM_LINK_DUPLEX_UNKNOWN), FALSE);
/* retrieve first current settings */
if (ethtool_call_ifindex (ifindex, &edata) < 0)
return FALSE;
/* FIXME: try first new ETHTOOL_GLINKSETTINGS/SLINKSETTINGS API
* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f1ac7a700d039c61d8d8b99f28d605d489a60cf
*/
/* then change the needed ones */
edata.cmd = ETHTOOL_SSET;
if (autoneg) {
edata.autoneg = AUTONEG_ENABLE;
if (!speed)
edata.advertising = edata.supported;
else {
guint32 mode;
mode = get_baset_mode (speed, duplex);
if (!mode) {
nm_log_trace (LOGD_PLATFORM,
"ethtool[%d]: %uBASE-T %s duplex mode cannot be advertised",
ifindex,
speed,
nm_platform_link_duplex_type_to_string (duplex));
return FALSE;
}
if (!(edata.supported & mode)) {
nm_log_trace (LOGD_PLATFORM,
"ethtool[%d]: device does not support %uBASE-T %s duplex mode",
ifindex,
speed,
nm_platform_link_duplex_type_to_string (duplex));
return FALSE;
}
edata.advertising = (edata.supported & ~BASET_ALL_MODES) | mode;
}
} else {
edata.autoneg = AUTONEG_DISABLE;
if (speed)
ethtool_cmd_speed_set (&edata, speed);
switch (duplex) {
case NM_PLATFORM_LINK_DUPLEX_HALF:
edata.duplex = DUPLEX_HALF;
break;
case NM_PLATFORM_LINK_DUPLEX_FULL:
edata.duplex = DUPLEX_FULL;
break;
case NM_PLATFORM_LINK_DUPLEX_UNKNOWN:
break;
default:
g_return_val_if_reached (FALSE);
}
}
return ethtool_call_ifindex (ifindex, &edata) >= 0;
}
gboolean
nmp_utils_ethtool_set_wake_on_lan (int ifindex,
NMSettingWiredWakeOnLan wol,
const char *wol_password)
{
struct ethtool_wolinfo wol_info = { };
g_return_val_if_fail (ifindex > 0, FALSE);
if (wol == NM_SETTING_WIRED_WAKE_ON_LAN_IGNORE)
return TRUE;
nm_log_dbg (LOGD_PLATFORM, "ethtool[%d]: setting Wake-on-LAN options 0x%x, password '%s'",
ifindex, (unsigned) wol, wol_password);
wol_info.cmd = ETHTOOL_SWOL;
wol_info.wolopts = 0;
if (NM_FLAGS_HAS (wol, NM_SETTING_WIRED_WAKE_ON_LAN_PHY))
wol_info.wolopts |= WAKE_PHY;
if (NM_FLAGS_HAS (wol, NM_SETTING_WIRED_WAKE_ON_LAN_UNICAST))
wol_info.wolopts |= WAKE_UCAST;
if (NM_FLAGS_HAS (wol, NM_SETTING_WIRED_WAKE_ON_LAN_MULTICAST))
wol_info.wolopts |= WAKE_MCAST;
if (NM_FLAGS_HAS (wol, NM_SETTING_WIRED_WAKE_ON_LAN_BROADCAST))
wol_info.wolopts |= WAKE_BCAST;
if (NM_FLAGS_HAS (wol, NM_SETTING_WIRED_WAKE_ON_LAN_ARP))
wol_info.wolopts |= WAKE_ARP;
if (NM_FLAGS_HAS (wol, NM_SETTING_WIRED_WAKE_ON_LAN_MAGIC))
wol_info.wolopts |= WAKE_MAGIC;
if (wol_password) {
if (!nm_utils_hwaddr_aton (wol_password, wol_info.sopass, ETH_ALEN)) {
nm_log_dbg (LOGD_PLATFORM, "ethtool[%d]: couldn't parse Wake-on-LAN password '%s'", ifindex, wol_password);
return FALSE;
}
wol_info.wolopts |= WAKE_MAGICSECURE;
}
return ethtool_call_ifindex (ifindex, &wol_info) >= 0;
}
/******************************************************************************
* mii
*****************************************************************************/
gboolean
nmp_utils_mii_supports_carrier_detect (int ifindex)
{
nm_auto_socket_handle SocketHandle shandle = { };
int r;
struct ifreq ifr;
struct mii_ioctl_data *mii;
int errsv;
g_return_val_if_fail (ifindex > 0, FALSE);
if ((r = socket_handle_init (&shandle, ifindex)) < 0) {
nm_log_trace (LOGD_PLATFORM, "mii[%d]: carrier-detect no: failed creating ethtool socket: %s",
ifindex,
nm_strerror_native (-r));
return FALSE;
}
memset (&ifr, 0, sizeof (struct ifreq));
memcpy (ifr.ifr_name, shandle.ifname, IFNAMSIZ);
if (ioctl (shandle.fd, SIOCGMIIPHY, &ifr) < 0) {
errsv = errno;
nm_log_trace (LOGD_PLATFORM, "mii[%d,%s]: carrier-detect no: SIOCGMIIPHY failed: %s", ifindex, shandle.ifname, nm_strerror_native (errsv));
return FALSE;
}
/* If we can read the BMSR register, we assume that the card supports MII link detection */
mii = (struct mii_ioctl_data *) &ifr.ifr_ifru;
mii->reg_num = MII_BMSR;
if (ioctl (shandle.fd, SIOCGMIIREG, &ifr) != 0) {
errsv = errno;
nm_log_trace (LOGD_PLATFORM, "mii[%d,%s]: carrier-detect no: SIOCGMIIREG failed: %s", ifindex, shandle.ifname, nm_strerror_native (errsv));
return FALSE;
}
nm_log_trace (LOGD_PLATFORM, "mii[%d,%s]: carrier-detect yes: SIOCGMIIREG result 0x%X", ifindex, shandle.ifname, mii->val_out);
return TRUE;
}
/******************************************************************************
* udev
*****************************************************************************/
const char *
nmp_utils_udev_get_driver (struct udev_device *udevice)
{
struct udev_device *parent = NULL, *grandparent = NULL;
const char *driver, *subsys;
driver = udev_device_get_driver (udevice);
if (driver)
goto out;
/* Try the parent */
parent = udev_device_get_parent (udevice);
if (parent) {
driver = udev_device_get_driver (parent);
if (!driver) {
/* Try the grandparent if it's an ibmebus device or if the
* subsys is NULL which usually indicates some sort of
* platform device like a 'gadget' net interface.
*/
subsys = udev_device_get_subsystem (parent);
if ( (g_strcmp0 (subsys, "ibmebus") == 0)
|| (subsys == NULL)) {
grandparent = udev_device_get_parent (parent);
if (grandparent)
driver = udev_device_get_driver (grandparent);
}
}
}
out:
/* Intern the string so we don't have to worry about memory
* management in NMPlatformLink. */
return g_intern_string (driver);
}
/******************************************************************************
* utils
*****************************************************************************/
NMIPConfigSource
nmp_utils_ip_config_source_from_rtprot (guint8 rtprot)
{
return ((int) rtprot) + 1;
}
NMIPConfigSource
nmp_utils_ip_config_source_round_trip_rtprot (NMIPConfigSource source)
{
/* when adding a route to kernel for a give @source, the resulting route
* will be put into the cache with a source of NM_IP_CONFIG_SOURCE_RTPROT_*.
* This function returns that. */
return nmp_utils_ip_config_source_from_rtprot (nmp_utils_ip_config_source_coerce_to_rtprot (source));
}
guint8
nmp_utils_ip_config_source_coerce_to_rtprot (NMIPConfigSource source)
{
/* when adding a route to kernel, we coerce the @source field
* to rtm_protocol. This is not lossless as we map different
* source values to the same RTPROT uint8 value. */
if (source <= NM_IP_CONFIG_SOURCE_UNKNOWN)
return RTPROT_UNSPEC;
if (source <= _NM_IP_CONFIG_SOURCE_RTPROT_LAST)
return source - 1;
switch (source) {
case NM_IP_CONFIG_SOURCE_KERNEL:
return RTPROT_KERNEL;
case NM_IP_CONFIG_SOURCE_IP6LL:
return RTPROT_KERNEL;
case NM_IP_CONFIG_SOURCE_DHCP:
return RTPROT_DHCP;
case NM_IP_CONFIG_SOURCE_NDISC:
return RTPROT_RA;
default:
return RTPROT_STATIC;
}
}
NMIPConfigSource
nmp_utils_ip_config_source_coerce_from_rtprot (NMIPConfigSource source)
{
/* When we receive a route from kernel and put it into the platform cache,
* we preserve the protocol field by converting it to a NMIPConfigSource
* via nmp_utils_ip_config_source_from_rtprot().
*
* However, that is not the inverse of nmp_utils_ip_config_source_coerce_to_rtprot().
* Instead, to go back to the original value, you need another step:
* nmp_utils_ip_config_source_coerce_from_rtprot (nmp_utils_ip_config_source_from_rtprot (rtprot)).
*
* This might partly restore the original source value, but of course that
* is not really possible because nmp_utils_ip_config_source_coerce_to_rtprot()
* is not injective.
* */
switch (source) {
case NM_IP_CONFIG_SOURCE_RTPROT_UNSPEC:
return NM_IP_CONFIG_SOURCE_UNKNOWN;
case NM_IP_CONFIG_SOURCE_RTPROT_KERNEL:
case NM_IP_CONFIG_SOURCE_RTPROT_REDIRECT:
return NM_IP_CONFIG_SOURCE_KERNEL;
case NM_IP_CONFIG_SOURCE_RTPROT_RA:
return NM_IP_CONFIG_SOURCE_NDISC;
case NM_IP_CONFIG_SOURCE_RTPROT_DHCP:
return NM_IP_CONFIG_SOURCE_DHCP;
default:
return NM_IP_CONFIG_SOURCE_USER;
}
}
const char *
nmp_utils_ip_config_source_to_string (NMIPConfigSource source, char *buf, gsize len)
{
const char *s = NULL;
nm_utils_to_string_buffer_init (&buf, &len); \
if (!len)
return buf;
switch (source) {
case NM_IP_CONFIG_SOURCE_UNKNOWN: s = "unknown"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_UNSPEC: s = "rt-unspec"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_REDIRECT: s = "rt-redirect"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_KERNEL: s = "rt-kernel"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_BOOT: s = "rt-boot"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_STATIC: s = "rt-static"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_DHCP: s = "rt-dhcp"; break;
case NM_IP_CONFIG_SOURCE_RTPROT_RA: s = "rt-ra"; break;
case NM_IP_CONFIG_SOURCE_KERNEL: s = "kernel"; break;
case NM_IP_CONFIG_SOURCE_SHARED: s = "shared"; break;
case NM_IP_CONFIG_SOURCE_IP4LL: s = "ipv4ll"; break;
case NM_IP_CONFIG_SOURCE_IP6LL: s = "ipv6ll"; break;
case NM_IP_CONFIG_SOURCE_PPP: s = "ppp"; break;
case NM_IP_CONFIG_SOURCE_WWAN: s = "wwan"; break;
case NM_IP_CONFIG_SOURCE_VPN: s = "vpn"; break;
case NM_IP_CONFIG_SOURCE_DHCP: s = "dhcp"; break;
case NM_IP_CONFIG_SOURCE_NDISC: s = "ndisc"; break;
case NM_IP_CONFIG_SOURCE_USER: s = "user"; break;
default:
break;
}
if (source >= 1 && source <= 0x100) {
if (s)
g_snprintf (buf, len, "%s", s);
else
g_snprintf (buf, len, "rt-%d", ((int) source) - 1);
} else {
if (s)
g_strlcpy (buf, s, len);
else
g_snprintf (buf, len, "(%d)", source);
}
return buf;
}
/**
* nmp_utils_sysctl_open_netdir:
* @ifindex: the ifindex for which to open "/sys/class/net/%s"
* @ifname_guess: (allow-none): optional argument, if present used as initial
* guess as the current name for @ifindex. If guessed right,
* it saves an additional if_indextoname() call.
* @out_ifname: (allow-none): if present, must be at least IFNAMSIZ
* characters. On success, this will contain the actual ifname
* found while opening the directory.
*
* Returns: a negative value on failure, on success returns the open fd
* to the "/sys/class/net/%s" directory for @ifindex.
*/
int
nmp_utils_sysctl_open_netdir (int ifindex,
const char *ifname_guess,
char *out_ifname)
{
#define SYS_CLASS_NET "/sys/class/net/"
const char *ifname = ifname_guess;
char ifname_buf_last_try[IFNAMSIZ];
char ifname_buf[IFNAMSIZ];
guint try_count = 0;
char sysdir[NM_STRLEN (SYS_CLASS_NET) + IFNAMSIZ] = SYS_CLASS_NET;
char fd_buf[256];
ssize_t nn;
g_return_val_if_fail (ifindex >= 0, -1);
ifname_buf_last_try[0] = '\0';
for (try_count = 0; try_count < 10; try_count++, ifname = NULL) {
nm_auto_close int fd_dir = -1;
nm_auto_close int fd_ifindex = -1;
if (!ifname) {
ifname = nmp_utils_if_indextoname (ifindex, ifname_buf);
if (!ifname)
return -1;
}
nm_assert (nm_utils_is_valid_iface_name (ifname, NULL));
if (g_strlcpy (&sysdir[NM_STRLEN (SYS_CLASS_NET)], ifname, IFNAMSIZ) >= IFNAMSIZ)
g_return_val_if_reached (-1);
/* we only retry, if the name changed since previous attempt.
* Hence, it is extremely unlikely that this loop runes until the
* end of the @try_count. */
if (nm_streq (ifname, ifname_buf_last_try))
return -1;
strcpy (ifname_buf_last_try, ifname);
fd_dir = open (sysdir, O_DIRECTORY | O_CLOEXEC);
if (fd_dir < 0)
continue;
fd_ifindex = openat (fd_dir, "ifindex", O_CLOEXEC);
if (fd_ifindex < 0)
continue;
nn = nm_utils_fd_read_loop (fd_ifindex, fd_buf, sizeof (fd_buf) - 2, FALSE);
if (nn <= 0)
continue;
fd_buf[nn] = '\0';
if (ifindex != (int) _nm_utils_ascii_str_to_int64 (fd_buf, 10, 1, G_MAXINT, -1))
continue;
if (out_ifname)
strcpy (out_ifname, ifname);
return nm_steal_fd (&fd_dir);
}
return -1;
}
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