colin/NetworkManager
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
d9968b133b32fbfbc5e726a8fc96e38cc044c831
NetworkManager/shared/nm-platform/nm-platform-utils.c

1808 lines
66 KiB
C
Raw Blame History

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2015 Red Hat, Inc.
*/
#include "nm-glib-aux/nm-default-glib-i18n-lib.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-base/nm-ethtool-base.h"
#include "nm-log-core/nm-logging.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);
}
/*****************************************************************************/
NM_UTILS_LOOKUP_STR_DEFINE(nm_platform_link_duplex_type_to_string,
NMPlatformLinkDuplexType,
NM_UTILS_LOOKUP_DEFAULT_WARN(NULL),
NM_UTILS_LOOKUP_STR_ITEM(NM_PLATFORM_LINK_DUPLEX_UNKNOWN, "unknown"),
NM_UTILS_LOOKUP_STR_ITEM(NM_PLATFORM_LINK_DUPLEX_FULL, "full"),
NM_UTILS_LOOKUP_STR_ITEM(NM_PLATFORM_LINK_DUPLEX_HALF, "half"), );
/*****************************************************************************/
typedef struct {
int fd;
const int ifindex;
char ifname[IFNAMSIZ];
} SocketHandle;
#define SOCKET_HANDLE_INIT(_ifindex) \
{ \
.fd = -1, .ifindex = (_ifindex), \
}
static void
_nm_auto_socket_handle(SocketHandle *shandle)
{
if (shandle->fd >= 0)
nm_close(shandle->fd);
}
#define nm_auto_socket_handle nm_auto(_nm_auto_socket_handle)
/*****************************************************************************/
typedef enum {
IOCTL_CALL_DATA_TYPE_NONE,
IOCTL_CALL_DATA_TYPE_IFRDATA,
IOCTL_CALL_DATA_TYPE_IFRU,
} IoctlCallDataType;
static int
_ioctl_call(const char * log_ioctl_type,
const char * log_subtype,
unsigned long int ioctl_request,
int ifindex,
int * inout_fd,
char * inout_ifname,
IoctlCallDataType edata_type,
gpointer edata,
gsize edata_size,
struct ifreq * out_ifreq)
{
nm_auto_close int fd_close = -1;
int fd;
int r;
gpointer edata_backup = NULL;
gs_free gpointer edata_backup_free = NULL;
guint try_count;
char known_ifnames[2][IFNAMSIZ];
const char * failure_reason = NULL;
struct ifreq ifr;
nm_assert(ifindex > 0);
nm_assert(NM_IN_SET(edata_type,
IOCTL_CALL_DATA_TYPE_NONE,
IOCTL_CALL_DATA_TYPE_IFRDATA,
IOCTL_CALL_DATA_TYPE_IFRU));
nm_assert(edata_type != IOCTL_CALL_DATA_TYPE_NONE || edata_size == 0);
nm_assert(edata_type != IOCTL_CALL_DATA_TYPE_IFRDATA || edata_size > 0);
nm_assert(edata_type != IOCTL_CALL_DATA_TYPE_IFRU
|| (edata_size > 0 && edata_size <= sizeof(ifr.ifr_ifru)));
nm_assert(edata_size == 0 || edata);
/* open a file descriptor (or use the one provided). */
if (inout_fd && *inout_fd >= 0)
fd = *inout_fd;
else {
fd = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (fd < 0) {
r = -NM_ERRNO_NATIVE(errno);
failure_reason = "failed creating socket or ioctl";
goto out;
}
if (inout_fd)
*inout_fd = fd;
else
fd_close = fd;
}
/* resolve the ifindex to name (or use the one provided). */
if (inout_ifname && inout_ifname[0])
nm_utils_ifname_cpy(known_ifnames[0], inout_ifname);
else {
if (!nmp_utils_if_indextoname(ifindex, known_ifnames[0])) {
failure_reason = "cannot resolve ifindex";
r = -ENODEV;
goto out;
}
if (inout_ifname)
nm_utils_ifname_cpy(inout_ifname, known_ifnames[0]);
}
/* we might need to retry the request. Backup edata so that we can
* restore it on retry. */
if (edata_size > 0)
edata_backup = nm_memdup_maybe_a(500, edata, edata_size, &edata_backup_free);
try_count = 0;
again:
{
const char *ifname = known_ifnames[try_count % 2];
nm_assert(ifindex > 0);
nm_assert(ifname && nm_utils_ifname_valid_kernel(ifname, NULL));
nm_assert(fd >= 0);
memset(&ifr, 0, sizeof(ifr));
nm_utils_ifname_cpy(ifr.ifr_name, ifname);
if (edata_type == IOCTL_CALL_DATA_TYPE_IFRDATA)
ifr.ifr_data = edata;
else if (edata_type == IOCTL_CALL_DATA_TYPE_IFRU)
memcpy(&ifr.ifr_ifru, edata, NM_MIN(edata_size, sizeof(ifr.ifr_ifru)));
if (ioctl(fd, ioctl_request, &ifr) < 0) {
r = -NM_ERRNO_NATIVE(errno);
nm_log_trace(LOGD_PLATFORM,
"%s[%d]: %s, %s: failed: %s",
log_ioctl_type,
ifindex,
log_subtype,
ifname,
nm_strerror_native(-r));
} else {
r = 0;
nm_log_trace(LOGD_PLATFORM,
"%s[%d]: %s, %s: success",
log_ioctl_type,
ifindex,
log_subtype,
ifname);
}
}
try_count++;
/* resolve the name again to see whether the ifindex still has the same name. */
if (!nmp_utils_if_indextoname(ifindex, known_ifnames[try_count % 2])) {
/* we could not find the ifindex again. Probably the device just got
* removed.
*
* In both cases we return the error code we got from ioctl above.
* Either it failed because the device was gone already or it still
* managed to complete the call. In both cases, the error code is good. */
failure_reason =
"cannot resolve ifindex after ioctl call. Probably the device was just removed";
goto out;
}
/* check whether the ifname changed in the meantime. If yes, would render the result
* invalid. Note that this cannot detect every race regarding renames, for example:
*
* - if_indextoname(#10) gives eth0
* - rename(#10) => eth0_tmp
* - rename(#11) => eth0
* - ioctl(eth0) (wrongly fetching #11, formerly eth1)
* - rename(#11) => eth_something
* - rename(#10) => eth0
* - if_indextoname(#10) gives eth0
*/
if (!nm_streq(known_ifnames[0], known_ifnames[1])) {
gboolean retry;
/* we detected a possible(!) rename.
*
* For getters it's straight forward to just retry the call.
*
* For setters we also always retry. If our previous call operated on the right device,
* calling it again should have no bad effect (just setting the same thing more than once).
*
* The only potential bad thing is if there was a race involving swapping names, and we just
* set the ioctl option on the wrong device. But then the bad thing already happenned and
* we cannot detect it (nor do anything about it). At least, we can retry and set the
* option on the right interface. */
retry = (try_count < 5);
nm_log_trace(LOGD_PLATFORM,
"%s[%d]: %s: rename detected from \"%s\" to \"%s\". %s",
log_ioctl_type,
ifindex,
log_subtype,
known_ifnames[(try_count - 1) % 2],
known_ifnames[try_count % 2],
retry ? "Retry" : "No retry");
if (inout_ifname)
nm_utils_ifname_cpy(inout_ifname, known_ifnames[try_count % 2]);
if (retry) {
if (edata_size > 0)
memcpy(edata, edata_backup, edata_size);
goto again;
}
}
out:
if (failure_reason) {
nm_log_trace(LOGD_PLATFORM,
"%s[%d]: %s: %s: %s",
log_ioctl_type,
ifindex,
log_subtype,
failure_reason,
r < 0 ? nm_strerror_native(-r) : "assume success");
}
if (r >= 0)
NM_SET_OUT(out_ifreq, ifr);
return r;
}
/******************************************************************************
* ethtool
*****************************************************************************/
static NM_UTILS_ENUM2STR_DEFINE(_ethtool_cmd_to_string,
guint32,
NM_UTILS_ENUM2STR(ETHTOOL_GCOALESCE, "ETHTOOL_GCOALESCE"),
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_GRINGPARAM, "ETHTOOL_GRINGPARAM"),
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_SCOALESCE, "ETHTOOL_SCOALESCE"),
NM_UTILS_ENUM2STR(ETHTOOL_SFEATURES, "ETHTOOL_SFEATURES"),
NM_UTILS_ENUM2STR(ETHTOOL_SRINGPARAM, "ETHTOOL_SRINGPARAM"),
NM_UTILS_ENUM2STR(ETHTOOL_SSET, "ETHTOOL_SSET"),
NM_UTILS_ENUM2STR(ETHTOOL_SWOL, "ETHTOOL_SWOL"), );
static const char *
_ethtool_edata_to_string(gpointer edata, gsize edata_size, char *sbuf, gsize sbuf_len)
{
nm_assert(edata);
nm_assert(edata_size >= sizeof(guint32));
nm_assert((((intptr_t) edata) % _nm_alignof(guint32)) == 0);
return _ethtool_cmd_to_string(*((guint32 *) edata), sbuf, sbuf_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, gsize edata_size)
{
char sbuf[50];
return _ioctl_call("ethtool",
_ethtool_edata_to_string(edata, edata_size, sbuf, sizeof(sbuf)),
SIOCETHTOOL,
shandle->ifindex,
&shandle->fd,
shandle->ifname,
IOCTL_CALL_DATA_TYPE_IFRDATA,
edata,
edata_size,
NULL);
}
static int
_ethtool_call_once(int ifindex, gpointer edata, gsize edata_size)
{
char sbuf[50];
return _ioctl_call("ethtool",
_ethtool_edata_to_string(edata, edata_size, sbuf, sizeof(sbuf)),
SIOCETHTOOL,
ifindex,
NULL,
NULL,
IOCTL_CALL_DATA_TYPE_IFRDATA,
edata,
edata_size,
NULL);
}
/*****************************************************************************/
static struct ethtool_gstrings *
ethtool_get_stringset(SocketHandle *shandle, int stringset_id)
{
struct {
struct ethtool_sset_info info;
guint32 sentinel;
} sset_info = {
.info.cmd = ETHTOOL_GSSET_INFO,
.info.reserved = 0,
.info.sset_mask = (1ULL << stringset_id),
};
const guint32 * pdata;
gs_free struct ethtool_gstrings *gstrings = NULL;
gsize gstrings_len;
guint32 i, len;
if (_ethtool_call_handle(shandle, &sset_info, sizeof(sset_info)) < 0)
return NULL;
if (!sset_info.info.sset_mask)
return NULL;
pdata = (guint32 *) sset_info.info.data;
len = *pdata;
gstrings_len = sizeof(*gstrings) + (len * ETH_GSTRING_LEN);
gstrings = g_malloc0(gstrings_len);
gstrings->cmd = ETHTOOL_GSTRINGS;
gstrings->string_set = stringset_id;
gstrings->len = len;
if (gstrings->len > 0) {
if (_ethtool_call_handle(shandle, gstrings, gstrings_len) < 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_MACSEC_HW_OFFLOAD, "macsec-hw-offload"),
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_GRO_LIST, "rx-gro-list"),
ETHT_FEAT(NM_ETHTOOL_ID_FEATURE_RX_UDP_GRO_FORWARDING, "rx-udp-gro-forwarding"),
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_RX_OFFLOAD, "tls-hw-rx-offload"),
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_LIST, "tx-gso-list"),
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_TUNNEL_REMCSUM_SEGMENTATION,
"tx-tunnel-remcsum-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[_NM_ETHTOOL_ID_FEATURE_AS_IDX(inf->ethtool_id)]);
found[_NM_ETHTOOL_ID_FEATURE_AS_IDX(inf->ethtool_id)] = 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++) {
const char *name = inf->kernel_names[k];
g_assert(nm_utils_strv_find_first((char **) inf->kernel_names, k, name) < 0);
/* these offload features are only informational and cannot be set from user-space
* (NETIF_F_NEVER_CHANGE). We should not track them in _ethtool_feature_infos. */
g_assert(!nm_streq(name, "netns-local"));
g_assert(!nm_streq(name, "tx-lockless"));
g_assert(!nm_streq(name, "vlan-challenged"));
}
}
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_free = NULL;
struct ethtool_gfeatures * gfeatures;
gsize gfeatures_len;
guint idx;
const NMEthtoolFeatureState * states_list0 = NULL;
const NMEthtoolFeatureState *const *states_plist0 = NULL;
guint states_plist_n = 0;
gfeatures_len = sizeof(struct ethtool_gfeatures)
+ (NM_DIV_ROUND_UP(ss_features->len, 32u) * sizeof(gfeatures->features[0]));
gfeatures = nm_malloc0_maybe_a(300, gfeatures_len, &gfeatures_free);
gfeatures->cmd = ETHTOOL_GFEATURES;
gfeatures->size = NM_DIV_ROUND_UP(ss_features->len, 32u);
if (_ethtool_call_handle(shandle, gfeatures, gfeatures_len) < 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[_NM_ETHTOOL_ID_FEATURE_AS_IDX(info->ethtool_id)])
states->states_indexed[_NM_ETHTOOL_ID_FEATURE_AS_IDX(info->ethtool_id)] =
&states_plist0[states_plist_n];
((const NMEthtoolFeatureState **) states_plist0)[states_plist_n] = kstate;
states_plist_n++;
}
if (states && states->states_indexed[_NM_ETHTOOL_ID_FEATURE_AS_IDX(info->ethtool_id)]) {
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 = SOCKET_HANDLE_INIT(ifindex);
NMEthtoolFeatureStates * features;
g_return_val_if_fail(ifindex > 0, 0);
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 NMOptionBool *requested /* indexed by NMEthtoolID - _NM_ETHTOOL_ID_FEATURE_FIRST */,
gboolean do_set /* or reset */)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
gs_free struct ethtool_sfeatures * sfeatures_free = NULL;
struct ethtool_sfeatures * sfeatures;
gsize sfeatures_len;
int r;
guint i, j;
struct {
const NMEthtoolFeatureState *f_state;
NMOptionBool 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_OPTION_BOOL_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_OPTION_BOOL_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_OPTION_BOOL_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_OPTION_BOOL_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;
}
sfeatures_len =
sizeof(struct ethtool_sfeatures)
+ (NM_DIV_ROUND_UP(features->n_ss_features, 32U) * sizeof(sfeatures->features[0]));
sfeatures = nm_malloc0_maybe_a(300, sfeatures_len, &sfeatures_free);
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_OPTION_BOOL_TRUE);
else
is_requested = s->active;
if (is_requested)
sfeatures->features[i_block].requested |= i_flag;
else
sfeatures->features[i_block].requested &= ~i_flag;
}
r = _ethtool_call_handle(&shandle, sfeatures, sfeatures_len);
if (r < 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;
}
static gboolean
ethtool_get_coalesce(SocketHandle *shandle, NMEthtoolCoalesceState *coalesce)
{
struct ethtool_coalesce eth_data;
eth_data.cmd = ETHTOOL_GCOALESCE;
if (_ethtool_call_handle(shandle, &eth_data, sizeof(struct ethtool_coalesce)) != 0)
return FALSE;
*coalesce = (NMEthtoolCoalesceState){
.s = {
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS)] =
eth_data.rx_coalesce_usecs,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES)] =
eth_data.rx_max_coalesced_frames,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS_IRQ)] =
eth_data.rx_coalesce_usecs_irq,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES_IRQ)] =
eth_data.rx_max_coalesced_frames_irq,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS)] =
eth_data.tx_coalesce_usecs,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES)] =
eth_data.tx_max_coalesced_frames,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS_IRQ)] =
eth_data.tx_coalesce_usecs_irq,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES_IRQ)] =
eth_data.tx_max_coalesced_frames_irq,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_STATS_BLOCK_USECS)] =
eth_data.stats_block_coalesce_usecs,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_ADAPTIVE_RX)] =
eth_data.use_adaptive_rx_coalesce,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_ADAPTIVE_TX)] =
eth_data.use_adaptive_tx_coalesce,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_PKT_RATE_LOW)] =
eth_data.pkt_rate_low,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS_LOW)] =
eth_data.rx_coalesce_usecs_low,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES_LOW)] =
eth_data.rx_max_coalesced_frames_low,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS_LOW)] =
eth_data.tx_coalesce_usecs_low,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES_LOW)] =
eth_data.tx_max_coalesced_frames_low,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_PKT_RATE_HIGH)] =
eth_data.pkt_rate_high,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS_HIGH)] =
eth_data.rx_coalesce_usecs_high,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES_HIGH)] =
eth_data.rx_max_coalesced_frames_high,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS_HIGH)] =
eth_data.tx_coalesce_usecs_high,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES_HIGH)] =
eth_data.tx_max_coalesced_frames_high,
[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_SAMPLE_INTERVAL)] =
eth_data.rate_sample_interval,
}};
return TRUE;
}
gboolean
nmp_utils_ethtool_get_coalesce(int ifindex, NMEthtoolCoalesceState *coalesce)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
g_return_val_if_fail(ifindex > 0, FALSE);
g_return_val_if_fail(coalesce, FALSE);
if (!ethtool_get_coalesce(&shandle, coalesce)) {
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: failure getting coalesce settings",
ifindex,
"get-coalesce");
return FALSE;
}
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: retrieved kernel coalesce settings",
ifindex,
"get-coalesce");
return TRUE;
}
static gboolean
ethtool_set_coalesce(SocketHandle *shandle, const NMEthtoolCoalesceState *coalesce)
{
struct ethtool_coalesce eth_data;
gboolean success;
nm_assert(shandle);
nm_assert(coalesce);
eth_data = (struct ethtool_coalesce){
.cmd = ETHTOOL_SCOALESCE,
.rx_coalesce_usecs =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS)],
.rx_max_coalesced_frames =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES)],
.rx_coalesce_usecs_irq =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS_IRQ)],
.rx_max_coalesced_frames_irq =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES_IRQ)],
.tx_coalesce_usecs =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS)],
.tx_max_coalesced_frames =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES)],
.tx_coalesce_usecs_irq =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS_IRQ)],
.tx_max_coalesced_frames_irq =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES_IRQ)],
.stats_block_coalesce_usecs =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_STATS_BLOCK_USECS)],
.use_adaptive_rx_coalesce =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_ADAPTIVE_RX)],
.use_adaptive_tx_coalesce =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_ADAPTIVE_TX)],
.pkt_rate_low =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_PKT_RATE_LOW)],
.rx_coalesce_usecs_low =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS_LOW)],
.rx_max_coalesced_frames_low =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES_LOW)],
.tx_coalesce_usecs_low =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS_LOW)],
.tx_max_coalesced_frames_low =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES_LOW)],
.pkt_rate_high =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_PKT_RATE_HIGH)],
.rx_coalesce_usecs_high =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_USECS_HIGH)],
.rx_max_coalesced_frames_high =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_RX_FRAMES_HIGH)],
.tx_coalesce_usecs_high =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_USECS_HIGH)],
.tx_max_coalesced_frames_high =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_TX_FRAMES_HIGH)],
.rate_sample_interval =
coalesce->s[_NM_ETHTOOL_ID_COALESCE_AS_IDX(NM_ETHTOOL_ID_COALESCE_SAMPLE_INTERVAL)],
};
success = (_ethtool_call_handle(shandle, &eth_data, sizeof(struct ethtool_coalesce)) == 0);
return success;
}
gboolean
nmp_utils_ethtool_set_coalesce(int ifindex, const NMEthtoolCoalesceState *coalesce)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
g_return_val_if_fail(ifindex > 0, FALSE);
g_return_val_if_fail(coalesce, FALSE);
if (!ethtool_set_coalesce(&shandle, coalesce)) {
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: failure setting coalesce settings",
ifindex,
"set-coalesce");
return FALSE;
}
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: set kernel coalesce settings",
ifindex,
"set-coalesce");
return TRUE;
}
static gboolean
ethtool_get_ring(SocketHandle *shandle, NMEthtoolRingState *ring)
{
struct ethtool_ringparam eth_data;
eth_data.cmd = ETHTOOL_GRINGPARAM;
if (_ethtool_call_handle(shandle, &eth_data, sizeof(struct ethtool_ringparam)) != 0)
return FALSE;
ring->rx_pending = eth_data.rx_pending;
ring->rx_jumbo_pending = eth_data.rx_jumbo_pending;
ring->rx_mini_pending = eth_data.rx_mini_pending;
ring->tx_pending = eth_data.tx_pending;
return TRUE;
}
gboolean
nmp_utils_ethtool_get_ring(int ifindex, NMEthtoolRingState *ring)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
g_return_val_if_fail(ifindex > 0, FALSE);
g_return_val_if_fail(ring, FALSE);
if (!ethtool_get_ring(&shandle, ring)) {
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: failure getting ring settings",
ifindex,
"get-ring");
return FALSE;
}
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: retrieved kernel ring settings",
ifindex,
"get-ring");
return TRUE;
}
static gboolean
ethtool_set_ring(SocketHandle *shandle, const NMEthtoolRingState *ring)
{
gboolean success;
struct ethtool_ringparam eth_data;
g_return_val_if_fail(shandle, FALSE);
g_return_val_if_fail(ring, FALSE);
eth_data = (struct ethtool_ringparam){
.cmd = ETHTOOL_SRINGPARAM,
.rx_pending = ring->rx_pending,
.rx_jumbo_pending = ring->rx_jumbo_pending,
.rx_mini_pending = ring->rx_mini_pending,
.tx_pending = ring->tx_pending,
};
success = (_ethtool_call_handle(shandle, &eth_data, sizeof(struct ethtool_ringparam)) == 0);
return success;
}
gboolean
nmp_utils_ethtool_set_ring(int ifindex, const NMEthtoolRingState *ring)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
g_return_val_if_fail(ifindex > 0, FALSE);
g_return_val_if_fail(ring, FALSE);
if (!ethtool_set_ring(&shandle, ring)) {
nm_log_trace(LOGD_PLATFORM,
"ethtool[%d]: %s: failure setting ring settings",
ifindex,
"set-ring");
return FALSE;
}
nm_log_trace(LOGD_PLATFORM, "ethtool[%d]: %s: set kernel ring settings", ifindex, "set-ring");
return TRUE;
}
/*****************************************************************************/
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;
*drvinfo = (struct ethtool_drvinfo){
.cmd = ETHTOOL_GDRVINFO,
};
return _ethtool_call_once(ifindex, drvinfo, sizeof(*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 = {
.e.cmd = ETHTOOL_GPERMADDR,
.e.size = _NM_UTILS_HWADDR_LEN_MAX,
};
const guint8 *pdata;
guint i;
g_return_val_if_fail(ifindex > 0, FALSE);
if (_ethtool_call_once(ifindex, &edata, sizeof(edata)) < 0)
return FALSE;
if (edata.e.size > _NM_UTILS_HWADDR_LEN_MAX)
return FALSE;
if (edata.e.size < 1)
return FALSE;
pdata = (const guint8 *) edata.e.data;
if (NM_IN_SET(pdata[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 (pdata[0] != pdata[i])
goto not_all_0or1;
}
return FALSE;
}
not_all_0or1:
memcpy(buf, pdata, 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_once(ifindex, &edata, sizeof(edata)) >= 0;
}
gboolean
nmp_utils_ethtool_supports_vlans(int ifindex)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
gs_free struct ethtool_gfeatures * features_free = NULL;
struct ethtool_gfeatures * features;
gsize features_len;
int idx, block, bit, size;
g_return_val_if_fail(ifindex > 0, 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_len = sizeof(*features) + (size * sizeof(struct ethtool_get_features_block));
features = nm_malloc0_maybe_a(300, features_len, &features_free);
features->cmd = ETHTOOL_GFEATURES;
features->size = size;
if (_ethtool_call_handle(&shandle, features, features_len) < 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 = SOCKET_HANDLE_INIT(ifindex);
gsize stats_len;
gs_free struct ethtool_stats * stats_free = NULL;
struct ethtool_stats * stats;
int peer_ifindex_stat;
g_return_val_if_fail(ifindex > 0, 0);
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_len = sizeof(*stats) + (peer_ifindex_stat + 1) * sizeof(guint64);
stats = nm_malloc0_maybe_a(300, stats_len, &stats_free);
stats->cmd = ETHTOOL_GSTATS;
stats->n_stats = peer_ifindex_stat + 1;
if (_ethtool_call_handle(&shandle, stats, stats_len) < 0)
return 0;
return stats->data[peer_ifindex_stat];
}
gboolean
nmp_utils_ethtool_get_wake_on_lan(int ifindex)
{
struct ethtool_wolinfo wol = {
.cmd = ETHTOOL_GWOL,
};
g_return_val_if_fail(ifindex > 0, FALSE);
if (_ethtool_call_once(ifindex, &wol, sizeof(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_once(ifindex, &edata, sizeof(edata)) < 0)
return FALSE;
NM_SET_OUT(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)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
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_handle(&shandle, &edata, sizeof(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_handle(&shandle, &edata, sizeof(edata)) >= 0;
}
gboolean
nmp_utils_ethtool_set_wake_on_lan(int ifindex,
_NMSettingWiredWakeOnLan wol,
const char * wol_password)
{
struct ethtool_wolinfo wol_info = {
.cmd = ETHTOOL_SWOL,
.wolopts = 0,
};
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);
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_exact(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_once(ifindex, &wol_info, sizeof(wol_info)) >= 0;
}
/******************************************************************************
* mii
*****************************************************************************/
gboolean
nmp_utils_mii_supports_carrier_detect(int ifindex)
{
nm_auto_socket_handle SocketHandle shandle = SOCKET_HANDLE_INIT(ifindex);
int r;
struct ifreq ifr;
struct mii_ioctl_data * mii;
g_return_val_if_fail(ifindex > 0, FALSE);
r = _ioctl_call("mii",
"SIOCGMIIPHY",
SIOCGMIIPHY,
shandle.ifindex,
&shandle.fd,
shandle.ifname,
IOCTL_CALL_DATA_TYPE_NONE,
NULL,
0,
&ifr);
if (r < 0)
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;
r = _ioctl_call("mii",
"SIOCGMIIREG",
SIOCGMIIREG,
shandle.ifindex,
&shandle.fd,
shandle.ifname,
IOCTL_CALL_DATA_TYPE_IFRU,
mii,
sizeof(*mii),
&ifr);
if (r < 0)
return FALSE;
mii = (struct mii_ioctl_data *) &ifr.ifr_ifru;
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_ifname_valid_kernel(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;
}
Reference in New Issue View Git Blame Copy Permalink