/* * * Copyright 2018 gRPC authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ /* This file contains constants defined in and * so as to allow collecting network timestamps in the * kernel. This file allows tcp_posix.cc to compile on platforms that do not * have and . */ #ifndef GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H #define GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H #include #include "src/core/lib/iomgr/port.h" #ifdef GRPC_POSIX_SOCKET_TCP #include #include #ifdef GRPC_LINUX_ERRQUEUE #include #include #include #include #endif /* GRPC_LINUX_ERRQUEUE */ namespace grpc_core { #ifdef GRPC_LINUX_ERRQUEUE /* Redefining scm_timestamping in the same way that defines * it, so that code compiles on systems that don't have it. */ struct scm_timestamping { struct timespec ts[3]; }; /* Also redefine timestamp types */ /* The timestamp type for when the driver passed skb to NIC, or HW. */ constexpr int SCM_TSTAMP_SND = 0; /* The timestamp type for when data entered the packet scheduler. */ constexpr int SCM_TSTAMP_SCHED = 1; /* The timestamp type for when data acknowledged by peer. */ constexpr int SCM_TSTAMP_ACK = 2; /* Control message type containing OPT_STATS */ #ifndef SCM_TIMESTAMPING_OPT_STATS #define SCM_TIMESTAMPING_OPT_STATS 54 #endif /* Redefine required constants from */ constexpr uint32_t SOF_TIMESTAMPING_TX_SOFTWARE = 1u << 1; constexpr uint32_t SOF_TIMESTAMPING_SOFTWARE = 1u << 4; constexpr uint32_t SOF_TIMESTAMPING_OPT_ID = 1u << 7; constexpr uint32_t SOF_TIMESTAMPING_TX_SCHED = 1u << 8; constexpr uint32_t SOF_TIMESTAMPING_TX_ACK = 1u << 9; constexpr uint32_t SOF_TIMESTAMPING_OPT_TSONLY = 1u << 11; constexpr uint32_t SOF_TIMESTAMPING_OPT_STATS = 1u << 12; constexpr uint32_t kTimestampingSocketOptions = SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_OPT_ID | SOF_TIMESTAMPING_OPT_TSONLY | SOF_TIMESTAMPING_OPT_STATS; constexpr uint32_t kTimestampingRecordingOptions = SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE | SOF_TIMESTAMPING_TX_ACK; /* Netlink attribute types used for TCP opt stats. */ enum TCPOptStats { TCP_NLA_PAD, TCP_NLA_BUSY, /* Time (usec) busy sending data. */ TCP_NLA_RWND_LIMITED, /* Time (usec) limited by receive window. */ TCP_NLA_SNDBUF_LIMITED, /* Time (usec) limited by send buffer. */ TCP_NLA_DATA_SEGS_OUT, /* Data pkts sent including retransmission. */ TCP_NLA_TOTAL_RETRANS, /* Data pkts retransmitted. */ TCP_NLA_PACING_RATE, /* Pacing rate in Bps. */ TCP_NLA_DELIVERY_RATE, /* Delivery rate in Bps. */ TCP_NLA_SND_CWND, /* Sending congestion window. */ TCP_NLA_REORDERING, /* Reordering metric. */ TCP_NLA_MIN_RTT, /* minimum RTT. */ TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt. */ TCP_NLA_DELIVERY_RATE_APP_LMT, /* Delivery rate application limited? */ TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */ TCP_NLA_CA_STATE, /* ca_state of socket */ TCP_NLA_SND_SSTHRESH, /* Slow start size threshold */ TCP_NLA_DELIVERED, /* Data pkts delivered incl. out-of-order */ TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */ TCP_NLA_BYTES_SENT, /* Data bytes sent including retransmission */ TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */ TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ TCP_NLA_REORD_SEEN, /* reordering events seen */ TCP_NLA_SRTT, /* smoothed RTT in usecs */ }; /* tcp_info from from linux/tcp.h */ struct tcp_info { uint8_t tcpi_state; uint8_t tcpi_ca_state; uint8_t tcpi_retransmits; uint8_t tcpi_probes; uint8_t tcpi_backoff; uint8_t tcpi_options; uint8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; uint8_t tcpi_delivery_rate_app_limited : 1; uint32_t tcpi_rto; uint32_t tcpi_ato; uint32_t tcpi_snd_mss; uint32_t tcpi_rcv_mss; uint32_t tcpi_unacked; uint32_t tcpi_sacked; uint32_t tcpi_lost; uint32_t tcpi_retrans; uint32_t tcpi_fackets; /* Times. */ uint32_t tcpi_last_data_sent; uint32_t tcpi_last_ack_sent; /* Not remembered, sorry. */ uint32_t tcpi_last_data_recv; uint32_t tcpi_last_ack_recv; /* Metrics. */ uint32_t tcpi_pmtu; uint32_t tcpi_rcv_ssthresh; uint32_t tcpi_rtt; uint32_t tcpi_rttvar; uint32_t tcpi_snd_ssthresh; uint32_t tcpi_snd_cwnd; uint32_t tcpi_advmss; uint32_t tcpi_reordering; uint32_t tcpi_rcv_rtt; uint32_t tcpi_rcv_space; uint32_t tcpi_total_retrans; uint64_t tcpi_pacing_rate; uint64_t tcpi_max_pacing_rate; uint64_t tcpi_bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked */ uint64_t tcpi_bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived */ uint32_t tcpi_segs_out; /* RFC4898 tcpEStatsPerfSegsOut */ uint32_t tcpi_segs_in; /* RFC4898 tcpEStatsPerfSegsIn */ uint32_t tcpi_notsent_bytes; uint32_t tcpi_min_rtt; uint32_t tcpi_data_segs_in; /* RFC4898 tcpEStatsDataSegsIn */ uint32_t tcpi_data_segs_out; /* RFC4898 tcpEStatsDataSegsOut */ uint64_t tcpi_delivery_rate; uint64_t tcpi_busy_time; /* Time (usec) busy sending data */ uint64_t tcpi_rwnd_limited; /* Time (usec) limited by receive window */ uint64_t tcpi_sndbuf_limited; /* Time (usec) limited by send buffer */ uint32_t tcpi_delivered; uint32_t tcpi_delivered_ce; uint64_t tcpi_bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut */ uint64_t tcpi_bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans */ uint32_t tcpi_dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups */ uint32_t tcpi_reord_seen; /* reordering events seen */ socklen_t length; /* Length of struct returned by kernel */ }; #ifndef TCP_INFO #define TCP_INFO 11 #endif #endif /* GRPC_LINUX_ERRQUEUE */ /* Returns true if kernel is capable of supporting errqueue and timestamping. * Currently allowing only linux kernels above 4.0.0 */ bool kernel_supports_errqueue(); } /* namespace grpc_core */ #endif /* GRPC_POSIX_SOCKET_TCP */ namespace grpc_core { /* Initializes errqueue support */ void grpc_errqueue_init(); } /* namespace grpc_core */ #endif /* GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H */