@@ -1230,6 +1230,39 @@ used to report the amplitude of the reflection for a given pair.
| | | ``ETHTOOL_A_CABLE_AMPLITUDE_mV`` | s16 | Reflection amplitude |
+-+-+-----------------------------------------+--------+----------------------+
+TUNNEL_INFO
+===========
+
+Gets information about the tunnel state NIC is aware of.
+
+Request contents:
+
+ ===================================== ====== ==========================
+ ``ETHTOOL_A_TUNNEL_INFO_HEADER`` nested request header
+ ===================================== ====== ==========================
+
+Kernel response contents:
+
+ +---------------------------------------------+--------+---------------------+
+ | ``ETHTOOL_A_TUNNEL_INFO_HEADER`` | nested | reply header |
+ +---------------------------------------------+--------+---------------------+
+ | ``ETHTOOL_A_TUNNEL_INFO_UDP_PORTS`` | nested | all UDP port tables |
+ +-+-------------------------------------------+--------+---------------------+
+ | | ``ETHTOOL_A_TUNNEL_UDP_TABLE`` | nested | one UDP port table |
+ +-+-+-----------------------------------------+--------+---------------------+
+ | | | ``ETHTOOL_A_TUNNEL_UDP_TABLE_SIZE`` | u32 | max size of the |
+ | | | | | table |
+ +-+-+-----------------------------------------+--------+---------------------+
+ | | | ``ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES`` | bitset | tunnel types which |
+ | | | | | table can hold |
+ +-+-+-----------------------------------------+--------+---------------------+
+ | | | ``ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY`` | nested | offloaded UDP port |
+ +-+-+-+---------------------------------------+--------+---------------------+
+ | | | | ``ETHTOOL_A_TUNNEL_UDP_ENTRY_PORT`` | be16 | UDP port |
+ +-+-+-+---------------------------------------+--------+---------------------+
+ | | | | ``ETHTOOL_A_TUNNEL_UDP_ENTRY_TYPE`` | u32 | tunnel type |
+ +-+-+-+---------------------------------------+--------+---------------------+
+
Request translation
===================
@@ -255,6 +255,10 @@ struct udp_tunnel_nic_ops {
void (*add_port)(struct net_device *dev, struct udp_tunnel_info *ti);
void (*del_port)(struct net_device *dev, struct udp_tunnel_info *ti);
void (*reset_ntf)(struct net_device *dev);
+
+ size_t (*dump_size)(struct net_device *dev, unsigned int table);
+ int (*dump_write)(struct net_device *dev, unsigned int table,
+ struct sk_buff *skb);
};
extern const struct udp_tunnel_nic_ops *udp_tunnel_nic_ops;
@@ -306,4 +310,21 @@ static inline void udp_tunnel_nic_reset_ntf(struct net_device *dev)
if (udp_tunnel_nic_ops)
udp_tunnel_nic_ops->reset_ntf(dev);
}
+
+static inline size_t
+udp_tunnel_nic_dump_size(struct net_device *dev, unsigned int table)
+{
+ if (!udp_tunnel_nic_ops)
+ return 0;
+ return udp_tunnel_nic_ops->dump_size(dev, table);
+}
+
+static inline int
+udp_tunnel_nic_dump_write(struct net_device *dev, unsigned int table,
+ struct sk_buff *skb)
+{
+ if (!udp_tunnel_nic_ops)
+ return 0;
+ return udp_tunnel_nic_ops->dump_write(dev, table, skb);
+}
#endif
@@ -669,6 +669,7 @@ enum ethtool_link_ext_substate_cable_issue {
* @ETH_SS_SOF_TIMESTAMPING: SOF_TIMESTAMPING_* flags
* @ETH_SS_TS_TX_TYPES: timestamping Tx types
* @ETH_SS_TS_RX_FILTERS: timestamping Rx filters
+ * @ETH_SS_UDP_TUNNEL_TYPES: UDP tunnel types
*/
enum ethtool_stringset {
ETH_SS_TEST = 0,
@@ -686,6 +687,7 @@ enum ethtool_stringset {
ETH_SS_SOF_TIMESTAMPING,
ETH_SS_TS_TX_TYPES,
ETH_SS_TS_RX_FILTERS,
+ ETH_SS_UDP_TUNNEL_TYPES,
/* add new constants above here */
ETH_SS_COUNT
@@ -41,6 +41,7 @@ enum {
ETHTOOL_MSG_TSINFO_GET,
ETHTOOL_MSG_CABLE_TEST_ACT,
ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
+ ETHTOOL_MSG_TUNNEL_INFO_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -556,6 +557,60 @@ enum {
ETHTOOL_A_CABLE_TEST_TDR_NTF_MAX = __ETHTOOL_A_CABLE_TEST_TDR_NTF_CNT - 1
};
+/* TUNNEL INFO */
+
+enum {
+ ETHTOOL_UDP_TUNNEL_TYPE_VXLAN,
+ ETHTOOL_UDP_TUNNEL_TYPE_GENEVE,
+ ETHTOOL_UDP_TUNNEL_TYPE_VXLAN_GPE,
+
+ __ETHTOOL_UDP_TUNNEL_TYPE_CNT
+};
+
+enum {
+ ETHTOOL_A_TUNNEL_UDP_ENTRY_UNSPEC,
+
+ ETHTOOL_A_TUNNEL_UDP_ENTRY_PORT, /* be16 */
+ ETHTOOL_A_TUNNEL_UDP_ENTRY_TYPE, /* u32 */
+
+ /* add new constants above here */
+ __ETHTOOL_A_TUNNEL_UDP_ENTRY_CNT,
+ ETHTOOL_A_TUNNEL_UDP_ENTRY_MAX = (__ETHTOOL_A_TUNNEL_UDP_ENTRY_CNT - 1)
+};
+
+enum {
+ ETHTOOL_A_TUNNEL_UDP_TABLE_UNSPEC,
+
+ ETHTOOL_A_TUNNEL_UDP_TABLE_SIZE, /* u32 */
+ ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES, /* bitset */
+ ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY, /* nest - _UDP_ENTRY_* */
+
+ /* add new constants above here */
+ __ETHTOOL_A_TUNNEL_UDP_TABLE_CNT,
+ ETHTOOL_A_TUNNEL_UDP_TABLE_MAX = (__ETHTOOL_A_TUNNEL_UDP_TABLE_CNT - 1)
+};
+
+enum {
+ ETHTOOL_A_TUNNEL_UDP_UNSPEC,
+
+ ETHTOOL_A_TUNNEL_UDP_TABLE, /* nest - _UDP_TABLE_* */
+
+ /* add new constants above here */
+ __ETHTOOL_A_TUNNEL_UDP_CNT,
+ ETHTOOL_A_TUNNEL_UDP_MAX = (__ETHTOOL_A_TUNNEL_UDP_CNT - 1)
+};
+
+enum {
+ ETHTOOL_A_TUNNEL_INFO_UNSPEC,
+ ETHTOOL_A_TUNNEL_INFO_HEADER, /* nest - _A_HEADER_* */
+
+ ETHTOOL_A_TUNNEL_INFO_UDP_PORTS, /* nest - _UDP_TABLE */
+
+ /* add new constants above here */
+ __ETHTOOL_A_TUNNEL_INFO_CNT,
+ ETHTOOL_A_TUNNEL_INFO_MAX = (__ETHTOOL_A_TUNNEL_INFO_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
@@ -6,4 +6,5 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
linkstate.o debug.o wol.o features.o privflags.o rings.o \
- channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o
+ channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \
+ tunnels.o
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/ethtool_netlink.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/rtnetlink.h>
@@ -257,6 +258,14 @@ const char ts_rx_filter_names[][ETH_GSTRING_LEN] = {
};
static_assert(ARRAY_SIZE(ts_rx_filter_names) == __HWTSTAMP_FILTER_CNT);
+const char udp_tunnel_type_names[][ETH_GSTRING_LEN] = {
+ [ETHTOOL_UDP_TUNNEL_TYPE_VXLAN] = "vxlan",
+ [ETHTOOL_UDP_TUNNEL_TYPE_GENEVE] = "geneve",
+ [ETHTOOL_UDP_TUNNEL_TYPE_VXLAN_GPE] = "vxlan-gpe",
+};
+static_assert(ARRAY_SIZE(udp_tunnel_type_names) ==
+ __ETHTOOL_UDP_TUNNEL_TYPE_CNT);
+
/* return false if legacy contained non-0 deprecated fields
* maxtxpkt/maxrxpkt. rest of ksettings always updated
*/
@@ -28,6 +28,7 @@ extern const char wol_mode_names[][ETH_GSTRING_LEN];
extern const char sof_timestamping_names[][ETH_GSTRING_LEN];
extern const char ts_tx_type_names[][ETH_GSTRING_LEN];
extern const char ts_rx_filter_names[][ETH_GSTRING_LEN];
+extern const char udp_tunnel_type_names[][ETH_GSTRING_LEN];
int __ethtool_get_link(struct net_device *dev);
@@ -181,6 +181,12 @@ struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
return NULL;
}
+void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
+{
+ return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ ðtool_genl_family, 0, cmd);
+}
+
void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
{
return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0,
@@ -849,6 +855,12 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_act_cable_test_tdr,
},
+ {
+ .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET,
+ .doit = ethnl_tunnel_info_doit,
+ .start = ethnl_tunnel_info_start,
+ .dumpit = ethnl_tunnel_info_dumpit,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
@@ -19,6 +19,7 @@ int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
u16 hdr_attrtype, struct genl_info *info,
void **ehdrp);
+void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd);
void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd);
int ethnl_multicast(struct sk_buff *skb, struct net_device *dev);
@@ -361,5 +362,8 @@ int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info);
int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info);
int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info);
+int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info);
+int ethnl_tunnel_info_start(struct netlink_callback *cb);
+int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
#endif /* _NET_ETHTOOL_NETLINK_H */
@@ -75,6 +75,11 @@ static const struct strset_info info_template[] = {
.count = __HWTSTAMP_FILTER_CNT,
.strings = ts_rx_filter_names,
},
+ [ETH_SS_UDP_TUNNEL_TYPES] = {
+ .per_dev = false,
+ .count = __ETHTOOL_UDP_TUNNEL_TYPE_CNT,
+ .strings = udp_tunnel_type_names,
+ },
};
struct strset_req_info {
new file mode 100644
@@ -0,0 +1,259 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/ethtool_netlink.h>
+#include <net/udp_tunnel.h>
+
+#include "bitset.h"
+#include "common.h"
+#include "netlink.h"
+
+static const struct nla_policy
+ethtool_tunnel_info_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1] = {
+ [ETHTOOL_A_TUNNEL_INFO_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_TUNNEL_INFO_HEADER] = { .type = NLA_NESTED },
+};
+
+static_assert(ETHTOOL_UDP_TUNNEL_TYPE_VXLAN == ilog2(UDP_TUNNEL_TYPE_VXLAN));
+static_assert(ETHTOOL_UDP_TUNNEL_TYPE_GENEVE == ilog2(UDP_TUNNEL_TYPE_GENEVE));
+static_assert(ETHTOOL_UDP_TUNNEL_TYPE_VXLAN_GPE ==
+ ilog2(UDP_TUNNEL_TYPE_VXLAN_GPE));
+
+static ssize_t
+ethnl_tunnel_info_reply_size(const struct ethnl_req_info *req_base,
+ struct netlink_ext_ack *extack)
+{
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ const struct udp_tunnel_nic_info *info;
+ unsigned int i;
+ size_t size;
+ int ret;
+
+ info = req_base->dev->udp_tunnel_nic_info;
+ if (!info) {
+ NL_SET_ERR_MSG(extack,
+ "device does not report tunnel offload info");
+ return -EOPNOTSUPP;
+ }
+
+ size = nla_total_size(0); /* _INFO_UDP_PORTS */
+
+ for (i = 0; i < UDP_TUNNEL_NIC_MAX_TABLES; i++) {
+ if (!info->tables[i].n_entries)
+ return size;
+
+ size += nla_total_size(0); /* _UDP_TABLE */
+ size += nla_total_size(sizeof(u32)); /* _UDP_TABLE_SIZE */
+ ret = ethnl_bitset32_size(&info->tables[i].tunnel_types, NULL,
+ __ETHTOOL_UDP_TUNNEL_TYPE_CNT,
+ udp_tunnel_type_names, compact);
+ if (ret < 0)
+ return ret;
+ size += ret;
+
+ size += udp_tunnel_nic_dump_size(req_base->dev, i);
+ }
+
+ return size;
+}
+
+static int
+ethnl_tunnel_info_fill_reply(const struct ethnl_req_info *req_base,
+ struct sk_buff *skb)
+{
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ const struct udp_tunnel_nic_info *info;
+ struct nlattr *ports, *table;
+ unsigned int i;
+
+ info = req_base->dev->udp_tunnel_nic_info;
+ if (!info)
+ return -EOPNOTSUPP;
+
+ ports = nla_nest_start(skb, ETHTOOL_A_TUNNEL_INFO_UDP_PORTS);
+ if (!ports)
+ return -EMSGSIZE;
+
+ for (i = 0; i < UDP_TUNNEL_NIC_MAX_TABLES; i++) {
+ if (!info->tables[i].n_entries)
+ break;
+
+ table = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE);
+ if (!table)
+ goto err_cancel_ports;
+
+ if (nla_put_u32(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_SIZE,
+ info->tables[i].n_entries))
+ goto err_cancel_table;
+
+ if (ethnl_put_bitset32(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES,
+ &info->tables[i].tunnel_types, NULL,
+ __ETHTOOL_UDP_TUNNEL_TYPE_CNT,
+ udp_tunnel_type_names, compact))
+ goto err_cancel_table;
+
+ if (udp_tunnel_nic_dump_write(req_base->dev, i, skb))
+ goto err_cancel_table;
+
+ nla_nest_end(skb, table);
+ }
+
+ nla_nest_end(skb, ports);
+
+ return 0;
+
+err_cancel_table:
+ nla_nest_cancel(skb, table);
+err_cancel_ports:
+ nla_nest_cancel(skb, ports);
+ return -EMSGSIZE;
+}
+
+static int
+ethnl_tunnel_info_req_parse(struct ethnl_req_info *req_info,
+ const struct nlmsghdr *nlhdr, struct net *net,
+ struct netlink_ext_ack *extack, bool require_dev)
+{
+ struct nlattr *tb[ETHTOOL_A_TUNNEL_INFO_MAX + 1];
+ int ret;
+
+ ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_TUNNEL_INFO_MAX,
+ ethtool_tunnel_info_policy, extack);
+ if (ret < 0)
+ return ret;
+
+ return ethnl_parse_header_dev_get(req_info,
+ tb[ETHTOOL_A_TUNNEL_INFO_HEADER],
+ net, extack, require_dev);
+}
+
+int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct ethnl_req_info req_info = {};
+ struct sk_buff *rskb;
+ void *reply_payload;
+ int reply_len;
+ int ret;
+
+ ret = ethnl_tunnel_info_req_parse(&req_info, info->nlhdr,
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+
+ rtnl_lock();
+ ret = ethnl_tunnel_info_reply_size(&req_info, info->extack);
+ if (ret < 0)
+ goto err_unlock_rtnl;
+ reply_len = ret + ethnl_reply_header_size();
+
+ rskb = ethnl_reply_init(reply_len, req_info.dev,
+ ETHTOOL_MSG_TUNNEL_INFO_GET,
+ ETHTOOL_A_TUNNEL_INFO_HEADER,
+ info, &reply_payload);
+ if (!rskb) {
+ ret = -ENOMEM;
+ goto err_unlock_rtnl;
+ }
+
+ ret = ethnl_tunnel_info_fill_reply(&req_info, rskb);
+ if (ret)
+ goto err_free_msg;
+ rtnl_unlock();
+ dev_put(req_info.dev);
+ genlmsg_end(rskb, reply_payload);
+
+ return genlmsg_reply(rskb, info);
+
+err_free_msg:
+ nlmsg_free(rskb);
+err_unlock_rtnl:
+ rtnl_unlock();
+ dev_put(req_info.dev);
+ return ret;
+}
+
+struct ethnl_tunnel_info_dump_ctx {
+ struct ethnl_req_info req_info;
+ int pos_hash;
+ int pos_idx;
+};
+
+int ethnl_tunnel_info_start(struct netlink_callback *cb)
+{
+ struct ethnl_tunnel_info_dump_ctx *ctx = (void *)cb->ctx;
+ int ret;
+
+ BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
+
+ memset(ctx, 0, sizeof(*ctx));
+
+ ret = ethnl_tunnel_info_req_parse(&ctx->req_info, cb->nlh,
+ sock_net(cb->skb->sk), cb->extack,
+ false);
+ if (ctx->req_info.dev) {
+ dev_put(ctx->req_info.dev);
+ ctx->req_info.dev = NULL;
+ }
+
+ return ret;
+}
+
+int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ethnl_tunnel_info_dump_ctx *ctx = (void *)cb->ctx;
+ struct net *net = sock_net(skb->sk);
+ int s_idx = ctx->pos_idx;
+ int h, idx = 0;
+ int ret = 0;
+ void *ehdr;
+
+ rtnl_lock();
+ cb->seq = net->dev_base_seq;
+ for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+ struct hlist_head *head;
+ struct net_device *dev;
+
+ head = &net->dev_index_head[h];
+ idx = 0;
+ hlist_for_each_entry(dev, head, index_hlist) {
+ if (idx < s_idx)
+ goto cont;
+
+ ehdr = ethnl_dump_put(skb, cb,
+ ETHTOOL_MSG_TUNNEL_INFO_GET);
+ if (!ehdr) {
+ ret = -EMSGSIZE;
+ goto out;
+ }
+
+ ret = ethnl_fill_reply_header(skb, dev, ETHTOOL_A_TUNNEL_INFO_HEADER);
+ if (ret < 0) {
+ genlmsg_cancel(skb, ehdr);
+ goto out;
+ }
+
+ ctx->req_info.dev = dev;
+ ret = ethnl_tunnel_info_fill_reply(&ctx->req_info, skb);
+ ctx->req_info.dev = NULL;
+ if (ret < 0) {
+ genlmsg_cancel(skb, ehdr);
+ if (ret == -EOPNOTSUPP)
+ goto cont;
+ goto out;
+ }
+ genlmsg_end(skb, ehdr);
+cont:
+ idx++;
+ }
+ }
+out:
+ rtnl_unlock();
+
+ ctx->pos_hash = h;
+ ctx->pos_idx = idx;
+ nl_dump_check_consistent(cb, nlmsg_hdr(skb));
+
+ if (ret == -EMSGSIZE && skb->len)
+ return skb->len;
+ return ret;
+}
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2020 Facebook Inc.
+#include <linux/ethtool_netlink.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/types.h>
@@ -72,6 +73,12 @@ udp_tunnel_nic_entry_is_free(struct udp_tunnel_nic_table_entry *entry)
return entry->use_cnt == 0 && !entry->flags;
}
+static bool
+udp_tunnel_nic_entry_is_present(struct udp_tunnel_nic_table_entry *entry)
+{
+ return entry->use_cnt && !(entry->flags & ~UDP_TUNNEL_NIC_ENTRY_FROZEN);
+}
+
static bool
udp_tunnel_nic_entry_is_frozen(struct udp_tunnel_nic_table_entry *entry)
{
@@ -571,12 +578,74 @@ static void __udp_tunnel_nic_reset_ntf(struct net_device *dev)
__udp_tunnel_nic_device_sync(dev, utn);
}
+static size_t
+__udp_tunnel_nic_dump_size(struct net_device *dev, unsigned int table)
+{
+ const struct udp_tunnel_nic_info *info = dev->udp_tunnel_nic_info;
+ struct udp_tunnel_nic *utn;
+ unsigned int j;
+ size_t size;
+
+ utn = dev->udp_tunnel_nic;
+ if (!utn)
+ return 0;
+
+ size = 0;
+ for (j = 0; j < info->tables[table].n_entries; j++) {
+ if (!udp_tunnel_nic_entry_is_present(&utn->entries[table][j]))
+ continue;
+
+ size += nla_total_size(0) + /* _TABLE_ENTRY */
+ nla_total_size(sizeof(__be16)) + /* _ENTRY_PORT */
+ nla_total_size(sizeof(u32)); /* _ENTRY_TYPE */
+ }
+
+ return size;
+}
+
+static int
+__udp_tunnel_nic_dump_write(struct net_device *dev, unsigned int table,
+ struct sk_buff *skb)
+{
+ const struct udp_tunnel_nic_info *info = dev->udp_tunnel_nic_info;
+ struct udp_tunnel_nic *utn;
+ struct nlattr *nest;
+ unsigned int j;
+
+ utn = dev->udp_tunnel_nic;
+ if (!utn)
+ return 0;
+
+ for (j = 0; j < info->tables[table].n_entries; j++) {
+ if (!udp_tunnel_nic_entry_is_present(&utn->entries[table][j]))
+ continue;
+
+ nest = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY);
+
+ if (nla_put_be16(skb, ETHTOOL_A_TUNNEL_UDP_ENTRY_PORT,
+ utn->entries[table][j].port) ||
+ nla_put_u32(skb, ETHTOOL_A_TUNNEL_UDP_ENTRY_TYPE,
+ ilog2(utn->entries[table][j].type)))
+ goto err_cancel;
+
+ nla_nest_end(skb, nest);
+ }
+
+ return 0;
+
+err_cancel:
+ nla_nest_cancel(skb, nest);
+ return -EMSGSIZE;
+}
+
static const struct udp_tunnel_nic_ops __udp_tunnel_nic_ops = {
.get_port = __udp_tunnel_nic_get_port,
.set_port_priv = __udp_tunnel_nic_set_port_priv,
.add_port = __udp_tunnel_nic_add_port,
.del_port = __udp_tunnel_nic_del_port,
.reset_ntf = __udp_tunnel_nic_reset_ntf,
+ .dump_size = __udp_tunnel_nic_dump_size,
+ .dump_write = __udp_tunnel_nic_dump_write,
};
static void
Add an interface to report offloaded UDP ports via ethtool netlink. Now that core takes care of tracking which UDP tunnel ports the NICs are aware of we can quite easily export this information out to user space. The responsibility of writing the netlink dumps is split between ethtool code and udp_tunnel_nic.c - since udp_tunnel module may not always be loaded, yet we should always report the capabilities of the NIC. $ ethtool --show-tunnels eth0 Tunnel information for eth0: UDP port table 0: Size: 4 Types: vxlan No entries UDP port table 1: Size: 4 Types: geneve, vxlan-gpe Entries (1): port 1230, vxlan-gpe v2: - fix string set count, - reorder enums in the uAPI, - fix type of ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES to bitset in docs and comments. Signed-off-by: Jakub Kicinski <kuba@kernel.org> --- Documentation/networking/ethtool-netlink.rst | 33 +++ include/net/udp_tunnel.h | 21 ++ include/uapi/linux/ethtool.h | 2 + include/uapi/linux/ethtool_netlink.h | 55 ++++ net/ethtool/Makefile | 3 +- net/ethtool/common.c | 9 + net/ethtool/common.h | 1 + net/ethtool/netlink.c | 12 + net/ethtool/netlink.h | 4 + net/ethtool/strset.c | 5 + net/ethtool/tunnels.c | 259 +++++++++++++++++++ net/ipv4/udp_tunnel_nic.c | 69 +++++ 12 files changed, 472 insertions(+), 1 deletion(-) create mode 100644 net/ethtool/tunnels.c