On 01.02.2024 04:33, Takeru Hayasaka wrote: > This is a patch that enables RSS functionality for GTP packets using ethtool. > > A user can include TEID and make RSS work for GTP-U over IPv4 by doing the > following:`ethtool -N ens3 rx-flow-hash gtpu4 sde` > > In addition to gtpu(4|6), we now support gtpc(4|6),gtpc(4|6)t,gtpu(4|6)e, > gtpu(4|6)u, and gtpu(4|6)d. > > gtpc(4|6): Used for GTP-C in IPv4 and IPv6, where the GTP header format does > not include a TEID. > gtpc(4|6)t: Used for GTP-C in IPv4 and IPv6, with a GTP header format that > includes a TEID. > gtpu(4|6): Used for GTP-U in both IPv4 and IPv6 scenarios. > gtpu(4|6)e: Used for GTP-U with extended headers in both IPv4 and IPv6. > gtpu(4|6)u: Used when the PSC (PDU session container) in the GTP-U extended > header includes Uplink, applicable to both IPv4 and IPv6. > gtpu(4|6)d: Used when the PSC in the GTP-U extended header includes Downlink, > for both IPv4 and IPv6. > > GTP generates a flow that includes an ID called TEID to identify the tunnel. > This tunnel is created for each UE (User Equipment).By performing RSS based on > this flow, it is possible to apply RSS for each communication unit from the UE. > Without this, RSS would only be effective within the range of IP addresses. For > instance, the PGW can only perform RSS within the IP range of the SGW. > Problematic from a load distribution perspective, especially if there's a bias > in the terminals connected to a particular base station.This case can be > solved by using this patch. Reviewed-by: Marcin Szycik <marcin.szycik@xxxxxxxxxxxxxxx> > Signed-off-by: Takeru Hayasaka <hayatake396@xxxxxxxxx> > --- > v2->v3: Based on Harald-san's review, I added documentation and comments to > ethtool.h and ice.rst. > v3->v4: Based on Marcin-san's review, I added the missing code for GTPC and > GTPC_TEID, and revised the documentation and comments. > v4->v5: Based on Marcin-san's review, I fixed rename and wrong code regarding > GTPC > v5->v6: Based on Marcin-san's review, Undoing the addition of unnecessary > blank lines.Minor fixes. > v6->v7 Based on Jakub-san's review, Split the patch. > include/uapi/linux/ethtool.h | 48 ++++++++++++++++++++++++++++++++++++ > 1 file changed, 48 insertions(+) > > diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h > index 06ef6b78b7de..11fc18988bc2 100644 > --- a/include/uapi/linux/ethtool.h > +++ b/include/uapi/linux/ethtool.h > @@ -2023,6 +2023,53 @@ static inline int ethtool_validate_duplex(__u8 duplex) > #define IPV4_FLOW 0x10 /* hash only */ > #define IPV6_FLOW 0x11 /* hash only */ > #define ETHER_FLOW 0x12 /* spec only (ether_spec) */ > + > +/* Used for GTP-U IPv4 and IPv6. > + * The format of GTP packets only includes > + * elements such as TEID and GTP version. > + * It is primarily intended for data communication of the UE. > + */ > +#define GTPU_V4_FLOW 0x13 /* hash only */ > +#define GTPU_V6_FLOW 0x14 /* hash only */ > + > +/* Use for GTP-C IPv4 and v6. > + * The format of these GTP packets does not include TEID. > + * Primarily expected to be used for communication > + * to create sessions for UE data communication, > + * commonly referred to as CSR (Create Session Request). > + */ > +#define GTPC_V4_FLOW 0x15 /* hash only */ > +#define GTPC_V6_FLOW 0x16 /* hash only */ > + > +/* Use for GTP-C IPv4 and v6. > + * Unlike GTPC_V4_FLOW, the format of these GTP packets includes TEID. > + * After session creation, it becomes this packet. > + * This is mainly used for requests to realize UE handover. > + */ > +#define GTPC_TEID_V4_FLOW 0x17 /* hash only */ > +#define GTPC_TEID_V6_FLOW 0x18 /* hash only */ > + > +/* Use for GTP-U and extended headers for the PSC (PDU Session Container). > + * The format of these GTP packets includes TEID and QFI. > + * In 5G communication using UPF (User Plane Function), > + * data communication with this extended header is performed. > + */ > +#define GTPU_EH_V4_FLOW 0x19 /* hash only */ > +#define GTPU_EH_V6_FLOW 0x1a /* hash only */ > + > +/* Use for GTP-U IPv4 and v6 PSC (PDU Session Container) extended headers. > + * This differs from GTPU_EH_V(4|6)_FLOW in that it is distinguished by > + * UL/DL included in the PSC. > + * There are differences in the data included based on Downlink/Uplink, > + * and can be used to distinguish packets. > + * The functions described so far are useful when you want to > + * handle communication from the mobile network in UPF, PGW, etc. > + */ > +#define GTPU_UL_V4_FLOW 0x1b /* hash only */ > +#define GTPU_UL_V6_FLOW 0x1c /* hash only */ > +#define GTPU_DL_V4_FLOW 0x1d /* hash only */ > +#define GTPU_DL_V6_FLOW 0x1e /* hash only */ > + > /* Flag to enable additional fields in struct ethtool_rx_flow_spec */ > #define FLOW_EXT 0x80000000 > #define FLOW_MAC_EXT 0x40000000 > @@ -2037,6 +2084,7 @@ static inline int ethtool_validate_duplex(__u8 duplex) > #define RXH_IP_DST (1 << 5) > #define RXH_L4_B_0_1 (1 << 6) /* src port in case of TCP/UDP/SCTP */ > #define RXH_L4_B_2_3 (1 << 7) /* dst port in case of TCP/UDP/SCTP */ > +#define RXH_GTP_TEID (1 << 8) /* teid in case of GTP */ > #define RXH_DISCARD (1 << 31) > > #define RX_CLS_FLOW_DISC 0xffffffffffffffffULL
