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-rw-r--r--include/linux/debugfs.h12
-rw-r--r--include/linux/netdevice.h8
-rw-r--r--include/net/udp_tunnel.h164
-rw-r--r--include/uapi/linux/ethtool.h2
-rw-r--r--include/uapi/linux/ethtool_netlink.h55
5 files changed, 235 insertions, 6 deletions
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 63cb3606dea7..851dd1f9a8a5 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -38,6 +38,11 @@ struct debugfs_regset32 {
struct device *dev; /* Optional device for Runtime PM */
};
+struct debugfs_u32_array {
+ u32 *array;
+ u32 n_elements;
+};
+
extern struct dentry *arch_debugfs_dir;
#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
@@ -136,7 +141,8 @@ void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
int nregs, void __iomem *base, char *prefix);
void debugfs_create_u32_array(const char *name, umode_t mode,
- struct dentry *parent, u32 *array, u32 elements);
+ struct dentry *parent,
+ struct debugfs_u32_array *array);
struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
struct dentry *parent,
@@ -316,8 +322,8 @@ static inline bool debugfs_initialized(void)
}
static inline void debugfs_create_u32_array(const char *name, umode_t mode,
- struct dentry *parent, u32 *array,
- u32 elements)
+ struct dentry *parent,
+ struct debugfs_u32_array *array)
{
}
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 39e28e11863c..ac2cd3f49aba 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -65,6 +65,8 @@ struct wpan_dev;
struct mpls_dev;
/* UDP Tunnel offloads */
struct udp_tunnel_info;
+struct udp_tunnel_nic_info;
+struct udp_tunnel_nic;
struct bpf_prog;
struct xdp_buff;
@@ -1836,6 +1838,10 @@ enum netdev_priv_flags {
*
* @macsec_ops: MACsec offloading ops
*
+ * @udp_tunnel_nic_info: static structure describing the UDP tunnel
+ * offload capabilities of the device
+ * @udp_tunnel_nic: UDP tunnel offload state
+ *
* FIXME: cleanup struct net_device such that network protocol info
* moves out.
*/
@@ -2134,6 +2140,8 @@ struct net_device {
/* MACsec management functions */
const struct macsec_ops *macsec_ops;
#endif
+ const struct udp_tunnel_nic_info *udp_tunnel_nic_info;
+ struct udp_tunnel_nic *udp_tunnel_nic;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)
diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
index e7312ceb2794..dd20ce99740c 100644
--- a/include/net/udp_tunnel.h
+++ b/include/net/udp_tunnel.h
@@ -106,15 +106,16 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
* call this function to perform Tx offloads on outgoing traffic.
*/
enum udp_parsable_tunnel_type {
- UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */
- UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */
- UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */
+ UDP_TUNNEL_TYPE_VXLAN = BIT(0), /* RFC 7348 */
+ UDP_TUNNEL_TYPE_GENEVE = BIT(1), /* draft-ietf-nvo3-geneve */
+ UDP_TUNNEL_TYPE_VXLAN_GPE = BIT(2), /* draft-ietf-nvo3-vxlan-gpe */
};
struct udp_tunnel_info {
unsigned short type;
sa_family_t sa_family;
__be16 port;
+ u8 hw_priv;
};
/* Notify network devices of offloadable types */
@@ -181,4 +182,161 @@ static inline void udp_tunnel_encap_enable(struct socket *sock)
udp_encap_enable();
}
+#define UDP_TUNNEL_NIC_MAX_TABLES 4
+
+enum udp_tunnel_nic_info_flags {
+ /* Device callbacks may sleep */
+ UDP_TUNNEL_NIC_INFO_MAY_SLEEP = BIT(0),
+ /* Device only supports offloads when it's open, all ports
+ * will be removed before close and re-added after open.
+ */
+ UDP_TUNNEL_NIC_INFO_OPEN_ONLY = BIT(1),
+ /* Device supports only IPv4 tunnels */
+ UDP_TUNNEL_NIC_INFO_IPV4_ONLY = BIT(2),
+};
+
+/**
+ * struct udp_tunnel_nic_info - driver UDP tunnel offload information
+ * @set_port: callback for adding a new port
+ * @unset_port: callback for removing a port
+ * @sync_table: callback for syncing the entire port table at once
+ * @flags: device flags from enum udp_tunnel_nic_info_flags
+ * @tables: UDP port tables this device has
+ * @tables.n_entries: number of entries in this table
+ * @tables.tunnel_types: types of tunnels this table accepts
+ *
+ * Drivers are expected to provide either @set_port and @unset_port callbacks
+ * or the @sync_table callback. Callbacks are invoked with rtnl lock held.
+ *
+ * Known limitations:
+ * - UDP tunnel port notifications are fundamentally best-effort -
+ * it is likely the driver will both see skbs which use a UDP tunnel port,
+ * while not being a tunneled skb, and tunnel skbs from other ports -
+ * drivers should only use these ports for non-critical RX-side offloads,
+ * e.g. the checksum offload;
+ * - none of the devices care about the socket family at present, so we don't
+ * track it. Please extend this code if you care.
+ */
+struct udp_tunnel_nic_info {
+ /* one-by-one */
+ int (*set_port)(struct net_device *dev,
+ unsigned int table, unsigned int entry,
+ struct udp_tunnel_info *ti);
+ int (*unset_port)(struct net_device *dev,
+ unsigned int table, unsigned int entry,
+ struct udp_tunnel_info *ti);
+
+ /* all at once */
+ int (*sync_table)(struct net_device *dev, unsigned int table);
+
+ unsigned int flags;
+
+ struct udp_tunnel_nic_table_info {
+ unsigned int n_entries;
+ unsigned int tunnel_types;
+ } tables[UDP_TUNNEL_NIC_MAX_TABLES];
+};
+
+/* UDP tunnel module dependencies
+ *
+ * Tunnel drivers are expected to have a hard dependency on the udp_tunnel
+ * module. NIC drivers are not, they just attach their
+ * struct udp_tunnel_nic_info to the netdev and wait for callbacks to come.
+ * Loading a tunnel driver will cause the udp_tunnel module to be loaded
+ * and only then will all the required state structures be allocated.
+ * Since we want a weak dependency from the drivers and the core to udp_tunnel
+ * we call things through the following stubs.
+ */
+struct udp_tunnel_nic_ops {
+ void (*get_port)(struct net_device *dev, unsigned int table,
+ unsigned int idx, struct udp_tunnel_info *ti);
+ void (*set_port_priv)(struct net_device *dev, unsigned int table,
+ unsigned int idx, u8 priv);
+ 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);
+};
+
+#ifdef CONFIG_INET
+extern const struct udp_tunnel_nic_ops *udp_tunnel_nic_ops;
+#else
+#define udp_tunnel_nic_ops ((struct udp_tunnel_nic_ops *)NULL)
+#endif
+
+static inline void
+udp_tunnel_nic_get_port(struct net_device *dev, unsigned int table,
+ unsigned int idx, struct udp_tunnel_info *ti)
+{
+ /* This helper is used from .sync_table, we indicate empty entries
+ * by zero'ed @ti. Drivers which need to know the details of a port
+ * when it gets deleted should use the .set_port / .unset_port
+ * callbacks.
+ * Zero out here, otherwise !CONFIG_INET causes uninitilized warnings.
+ */
+ memset(ti, 0, sizeof(*ti));
+
+ if (udp_tunnel_nic_ops)
+ udp_tunnel_nic_ops->get_port(dev, table, idx, ti);
+}
+
+static inline void
+udp_tunnel_nic_set_port_priv(struct net_device *dev, unsigned int table,
+ unsigned int idx, u8 priv)
+{
+ if (udp_tunnel_nic_ops)
+ udp_tunnel_nic_ops->set_port_priv(dev, table, idx, priv);
+}
+
+static inline void
+udp_tunnel_nic_add_port(struct net_device *dev, struct udp_tunnel_info *ti)
+{
+ if (udp_tunnel_nic_ops)
+ udp_tunnel_nic_ops->add_port(dev, ti);
+}
+
+static inline void
+udp_tunnel_nic_del_port(struct net_device *dev, struct udp_tunnel_info *ti)
+{
+ if (udp_tunnel_nic_ops)
+ udp_tunnel_nic_ops->del_port(dev, ti);
+}
+
+/**
+ * udp_tunnel_nic_reset_ntf() - device-originating reset notification
+ * @dev: network interface device structure
+ *
+ * Called by the driver to inform the core that the entire UDP tunnel port
+ * state has been lost, usually due to device reset. Core will assume device
+ * forgot all the ports and issue .set_port and .sync_table callbacks as
+ * necessary.
+ *
+ * This function must be called with rtnl lock held, and will issue all
+ * the callbacks before returning.
+ */
+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
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 60856e0f9618..b4f2d134e713 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -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
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index c12ce4df4b6b..5dcd24cb33ea 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -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
generated by cgit v1.2.3 (git 2.0.4) at 2026-01-10 17:33:45 +0000