| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kurt Kanzenbach | 235 | 36.10% | 3 | 15.79% |
| Christian Eggers | 220 | 33.79% | 2 | 10.53% |
| Richard Cochran | 117 | 17.97% | 4 | 21.05% |
| Daniel Borkmann | 41 | 6.30% | 2 | 10.53% |
| Andrew Lunn | 12 | 1.84% | 1 | 5.26% |
| Stefan Sörensen | 10 | 1.54% | 2 | 10.53% |
| Harini Katakam | 5 | 0.77% | 1 | 5.26% |
| Vladimir Oltean | 4 | 0.61% | 1 | 5.26% |
| Yangbo Lu | 4 | 0.61% | 1 | 5.26% |
| Thomas Gleixner | 2 | 0.31% | 1 | 5.26% |
| Eric Dumazet | 1 | 0.15% | 1 | 5.26% |
| Total | 651 | 19 |
/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * PTP 1588 support * * This file implements a BPF that recognizes PTP event messages. * * Copyright (C) 2010 OMICRON electronics GmbH */ #ifndef _PTP_CLASSIFY_H_ #define _PTP_CLASSIFY_H_ #include <asm/unaligned.h> #include <linux/ip.h> #include <linux/ktime.h> #include <linux/skbuff.h> #include <linux/udp.h> #include <net/checksum.h> #define PTP_CLASS_NONE 0x00 /* not a PTP event message */ #define PTP_CLASS_V1 0x01 /* protocol version 1 */ #define PTP_CLASS_V2 0x02 /* protocol version 2 */ #define PTP_CLASS_VMASK 0x0f /* max protocol version is 15 */ #define PTP_CLASS_IPV4 0x10 /* event in an IPV4 UDP packet */ #define PTP_CLASS_IPV6 0x20 /* event in an IPV6 UDP packet */ #define PTP_CLASS_L2 0x40 /* event in a L2 packet */ #define PTP_CLASS_PMASK 0x70 /* mask for the packet type field */ #define PTP_CLASS_VLAN 0x80 /* event in a VLAN tagged packet */ #define PTP_CLASS_V1_IPV4 (PTP_CLASS_V1 | PTP_CLASS_IPV4) #define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 | PTP_CLASS_IPV6) /* probably DNE */ #define PTP_CLASS_V2_IPV4 (PTP_CLASS_V2 | PTP_CLASS_IPV4) #define PTP_CLASS_V2_IPV6 (PTP_CLASS_V2 | PTP_CLASS_IPV6) #define PTP_CLASS_V2_L2 (PTP_CLASS_V2 | PTP_CLASS_L2) #define PTP_CLASS_V2_VLAN (PTP_CLASS_V2 | PTP_CLASS_VLAN) #define PTP_CLASS_L4 (PTP_CLASS_IPV4 | PTP_CLASS_IPV6) #define PTP_MSGTYPE_SYNC 0x0 #define PTP_MSGTYPE_DELAY_REQ 0x1 #define PTP_MSGTYPE_PDELAY_REQ 0x2 #define PTP_MSGTYPE_PDELAY_RESP 0x3 #define PTP_EV_PORT 319 #define PTP_GEN_PORT 320 #define PTP_GEN_BIT 0x08 /* indicates general message, if set in message type */ #define OFF_PTP_SOURCE_UUID 22 /* PTPv1 only */ #define OFF_PTP_SEQUENCE_ID 30 /* PTP header flag fields */ #define PTP_FLAG_TWOSTEP BIT(1) /* Below defines should actually be removed at some point in time. */ #define IP6_HLEN 40 #define UDP_HLEN 8 #define OFF_IHL 14 #define IPV4_HLEN(data) (((struct iphdr *)(data + OFF_IHL))->ihl << 2) struct clock_identity { u8 id[8]; } __packed; struct port_identity { struct clock_identity clock_identity; __be16 port_number; } __packed; struct ptp_header { u8 tsmt; /* transportSpecific | messageType */ u8 ver; /* reserved | versionPTP */ __be16 message_length; u8 domain_number; u8 reserved1; u8 flag_field[2]; __be64 correction; __be32 reserved2; struct port_identity source_port_identity; __be16 sequence_id; u8 control; u8 log_message_interval; } __packed; #if defined(CONFIG_NET_PTP_CLASSIFY) /** * ptp_classify_raw - classify a PTP packet * @skb: buffer * * Runs a minimal BPF dissector to classify a network packet to * determine the PTP class. In case the skb does not contain any * PTP protocol data, PTP_CLASS_NONE will be returned, otherwise * PTP_CLASS_V1_IPV{4,6}, PTP_CLASS_V2_IPV{4,6} or * PTP_CLASS_V2_{L2,VLAN}, depending on the packet content. */ unsigned int ptp_classify_raw(const struct sk_buff *skb); /** * ptp_parse_header - Get pointer to the PTP v2 header * @skb: packet buffer * @type: type of the packet (see ptp_classify_raw()) * * This function takes care of the VLAN, UDP, IPv4 and IPv6 headers. The length * is checked. * * Note, internally skb_mac_header() is used. Make sure that the @skb is * initialized accordingly. * * Return: Pointer to the ptp v2 header or NULL if not found */ struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type); /** * ptp_get_msgtype - Extract ptp message type from given header * @hdr: ptp header * @type: type of the packet (see ptp_classify_raw()) * * This function returns the message type for a given ptp header. It takes care * of the different ptp header versions (v1 or v2). * * Return: The message type */ static inline u8 ptp_get_msgtype(const struct ptp_header *hdr, unsigned int type) { u8 msgtype; if (unlikely(type & PTP_CLASS_V1)) { /* msg type is located at the control field for ptp v1 */ msgtype = hdr->control; } else { msgtype = hdr->tsmt & 0x0f; } return msgtype; } /** * ptp_check_diff8 - Computes new checksum (when altering a 64-bit field) * @old: old field value * @new: new field value * @oldsum: previous checksum * * This function can be used to calculate a new checksum when only a single * field is changed. Similar as ip_vs_check_diff*() in ip_vs.h. * * Return: Updated checksum */ static inline __wsum ptp_check_diff8(__be64 old, __be64 new, __wsum oldsum) { __be64 diff[2] = { ~old, new }; return csum_partial(diff, sizeof(diff), oldsum); } /** * ptp_header_update_correction - Update PTP header's correction field * @skb: packet buffer * @type: type of the packet (see ptp_classify_raw()) * @hdr: ptp header * @correction: new correction value * * This updates the correction field of a PTP header and updates the UDP * checksum (if UDP is used as transport). It is needed for hardware capable of * one-step P2P that does not already modify the correction field of Pdelay_Req * event messages on ingress. */ static inline void ptp_header_update_correction(struct sk_buff *skb, unsigned int type, struct ptp_header *hdr, s64 correction) { __be64 correction_old; struct udphdr *uhdr; /* previous correction value is required for checksum update. */ memcpy(&correction_old, &hdr->correction, sizeof(correction_old)); /* write new correction value */ put_unaligned_be64((u64)correction, &hdr->correction); switch (type & PTP_CLASS_PMASK) { case PTP_CLASS_IPV4: case PTP_CLASS_IPV6: /* locate udp header */ uhdr = (struct udphdr *)((char *)hdr - sizeof(struct udphdr)); break; default: return; } /* update checksum */ uhdr->check = csum_fold(ptp_check_diff8(correction_old, hdr->correction, ~csum_unfold(uhdr->check))); if (!uhdr->check) uhdr->check = CSUM_MANGLED_0; skb->ip_summed = CHECKSUM_NONE; } /** * ptp_msg_is_sync - Evaluates whether the given skb is a PTP Sync message * @skb: packet buffer * @type: type of the packet (see ptp_classify_raw()) * * This function evaluates whether the given skb is a PTP Sync message. * * Return: true if sync message, false otherwise */ bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type); void __init ptp_classifier_init(void); #else static inline void ptp_classifier_init(void) { } static inline unsigned int ptp_classify_raw(struct sk_buff *skb) { return PTP_CLASS_NONE; } static inline struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type) { return NULL; } static inline u8 ptp_get_msgtype(const struct ptp_header *hdr, unsigned int type) { /* The return is meaningless. The stub function would not be * executed since no available header from ptp_parse_header. */ return PTP_MSGTYPE_SYNC; } static inline bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type) { return false; } static inline void ptp_header_update_correction(struct sk_buff *skb, unsigned int type, struct ptp_header *hdr, s64 correction) { } #endif #endif /* _PTP_CLASSIFY_H_ */