diff options
Diffstat (limited to 'samples')
53 files changed, 2275 insertions, 1059 deletions
diff --git a/samples/bpf/.gitignore b/samples/bpf/.gitignore index 8ae4940025f8..dbb817dbacfc 100644 --- a/samples/bpf/.gitignore +++ b/samples/bpf/.gitignore @@ -1,7 +1,6 @@ cpustat fds_example lathist -load_sock_ops lwt_len_hist map_perf_test offwaketime diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 66ae15f27c70..65e667bdf979 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -40,7 +40,6 @@ hostprogs-y += lwt_len_hist hostprogs-y += xdp_tx_iptunnel hostprogs-y += test_map_in_map hostprogs-y += per_socket_stats_example -hostprogs-y += load_sock_ops hostprogs-y += xdp_redirect hostprogs-y += xdp_redirect_map hostprogs-y += xdp_redirect_cpu @@ -53,6 +52,7 @@ hostprogs-y += xdpsock hostprogs-y += xdp_fwd hostprogs-y += task_fd_query hostprogs-y += xdp_sample_pkts +hostprogs-y += hbm # Libbpf dependencies LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a @@ -60,9 +60,9 @@ LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o -fds_example-objs := bpf_load.o fds_example.o -sockex1-objs := bpf_load.o sockex1_user.o -sockex2-objs := bpf_load.o sockex2_user.o +fds_example-objs := fds_example.o +sockex1-objs := sockex1_user.o +sockex2-objs := sockex2_user.o sockex3-objs := bpf_load.o sockex3_user.o tracex1-objs := bpf_load.o tracex1_user.o tracex2-objs := bpf_load.o tracex2_user.o @@ -71,7 +71,6 @@ tracex4-objs := bpf_load.o tracex4_user.o tracex5-objs := bpf_load.o tracex5_user.o tracex6-objs := bpf_load.o tracex6_user.o tracex7-objs := bpf_load.o tracex7_user.o -load_sock_ops-objs := bpf_load.o load_sock_ops.o test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS) lathist-objs := bpf_load.o lathist_user.o @@ -87,18 +86,18 @@ test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o xdp1-objs := xdp1_user.o # reuse xdp1 source intentionally xdp2-objs := xdp1_user.o -xdp_router_ipv4-objs := bpf_load.o xdp_router_ipv4_user.o +xdp_router_ipv4-objs := xdp_router_ipv4_user.o test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \ test_current_task_under_cgroup_user.o trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS) sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS) tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o -xdp_tx_iptunnel-objs := bpf_load.o xdp_tx_iptunnel_user.o +xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o test_map_in_map-objs := bpf_load.o test_map_in_map_user.o per_socket_stats_example-objs := cookie_uid_helper_example.o -xdp_redirect-objs := bpf_load.o xdp_redirect_user.o -xdp_redirect_map-objs := bpf_load.o xdp_redirect_map_user.o +xdp_redirect-objs := xdp_redirect_user.o +xdp_redirect_map-objs := xdp_redirect_map_user.o xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o xdp_monitor-objs := bpf_load.o xdp_monitor_user.o xdp_rxq_info-objs := xdp_rxq_info_user.o @@ -109,6 +108,7 @@ xdpsock-objs := xdpsock_user.o xdp_fwd-objs := xdp_fwd_user.o task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS) xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS) +hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS) # Tell kbuild to always build the programs always := $(hostprogs-y) @@ -163,10 +163,10 @@ always += xdp2skb_meta_kern.o always += syscall_tp_kern.o always += cpustat_kern.o always += xdp_adjust_tail_kern.o -always += xdpsock_kern.o always += xdp_fwd_kern.o always += task_fd_query_kern.o always += xdp_sample_pkts_kern.o +always += hbm_out_kern.o KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ @@ -266,6 +266,8 @@ $(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF) $(src)/*.c: verify_target_bpf $(LIBBPF) $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h +$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h +$(obj)/hbm.o: $(src)/hbm.h # asm/sysreg.h - inline assembly used by it is incompatible with llvm. # But, there is no easy way to fix it, so just exclude it since it is @@ -279,6 +281,7 @@ $(obj)/%.o: $(src)/%.c -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ + -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ ifeq ($(DWARF2BTF),y) $(BTF_PAHOLE) -J $@ diff --git a/samples/bpf/asm_goto_workaround.h b/samples/bpf/asm_goto_workaround.h new file mode 100644 index 000000000000..5cd7c1d1a5d5 --- /dev/null +++ b/samples/bpf/asm_goto_workaround.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2019 Facebook */ +#ifndef __ASM_GOTO_WORKAROUND_H +#define __ASM_GOTO_WORKAROUND_H + +/* this will bring in asm_volatile_goto macro definition + * if enabled by compiler and config options. + */ +#include <linux/types.h> + +#ifdef asm_volatile_goto +#undef asm_volatile_goto +#define asm_volatile_goto(x...) asm volatile("invalid use of asm_volatile_goto") +#endif + +#endif diff --git a/samples/bpf/bpf_insn.h b/samples/bpf/bpf_insn.h index 20dc5cefec84..544237980582 100644 --- a/samples/bpf/bpf_insn.h +++ b/samples/bpf/bpf_insn.h @@ -164,6 +164,16 @@ struct bpf_insn; .off = OFF, \ .imm = 0 }) +/* Like BPF_JMP_REG, but with 32-bit wide operands for comparison. */ + +#define BPF_JMP32_REG(OP, DST, SRC, OFF) \ + ((struct bpf_insn) { \ + .code = BPF_JMP32 | BPF_OP(OP) | BPF_X, \ + .dst_reg = DST, \ + .src_reg = SRC, \ + .off = OFF, \ + .imm = 0 }) + /* Conditional jumps against immediates, if (dst_reg 'op' imm32) goto pc + off16 */ #define BPF_JMP_IMM(OP, DST, IMM, OFF) \ @@ -174,6 +184,16 @@ struct bpf_insn; .off = OFF, \ .imm = IMM }) +/* Like BPF_JMP_IMM, but with 32-bit wide operands for comparison. */ + +#define BPF_JMP32_IMM(OP, DST, IMM, OFF) \ + ((struct bpf_insn) { \ + .code = BPF_JMP32 | BPF_OP(OP) | BPF_K, \ + .dst_reg = DST, \ + .src_reg = 0, \ + .off = OFF, \ + .imm = IMM }) + /* Raw code statement block */ #define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \ diff --git a/samples/bpf/do_hbm_test.sh b/samples/bpf/do_hbm_test.sh new file mode 100755 index 000000000000..56c8b4115c95 --- /dev/null +++ b/samples/bpf/do_hbm_test.sh @@ -0,0 +1,436 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2019 Facebook +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of version 2 of the GNU General Public +# License as published by the Free Software Foundation. + +Usage() { + echo "Script for testing HBM (Host Bandwidth Manager) framework." + echo "It creates a cgroup to use for testing and load a BPF program to limit" + echo "egress or ingress bandwidht. It then uses iperf3 or netperf to create" + echo "loads. The output is the goodput in Mbps (unless -D was used)." + echo "" + echo "USAGE: $name [out] [-b=<prog>|--bpf=<prog>] [-c=<cc>|--cc=<cc>] [-D]" + echo " [-d=<delay>|--delay=<delay>] [--debug] [-E]" + echo " [-f=<#flows>|--flows=<#flows>] [-h] [-i=<id>|--id=<id >]" + echo " [-l] [-N] [-p=<port>|--port=<port>] [-P]" + echo " [-q=<qdisc>] [-R] [-s=<server>|--server=<server]" + echo " [-S|--stats] -t=<time>|--time=<time>] [-w] [cubic|dctcp]" + echo " Where:" + echo " out egress (default)" + echo " -b or --bpf BPF program filename to load and attach." + echo " Default is hbm_out_kern.o for egress," + echo " -c or -cc TCP congestion control (cubic or dctcp)" + echo " --debug print BPF trace buffer" + echo " -d or --delay add a delay in ms using netem" + echo " -D In addition to the goodput in Mbps, it also outputs" + echo " other detailed information. This information is" + echo " test dependent (i.e. iperf3 or netperf)." + echo " -E enable ECN (not required for dctcp)" + echo " -f or --flows number of concurrent flows (default=1)" + echo " -i or --id cgroup id (an integer, default is 1)" + echo " -N use netperf instead of iperf3" + echo " -l do not limit flows using loopback" + echo " -h Help" + echo " -p or --port iperf3 port (default is 5201)" + echo " -P use an iperf3 instance for each flow" + echo " -q use the specified qdisc" + echo " -r or --rate rate in Mbps (default 1s 1Gbps)" + echo " -R Use TCP_RR for netperf. 1st flow has req" + echo " size of 10KB, rest of 1MB. Reply in all" + echo " cases is 1 byte." + echo " More detailed output for each flow can be found" + echo " in the files netperf.<cg>.<flow>, where <cg> is the" + echo " cgroup id as specified with the -i flag, and <flow>" + echo " is the flow id starting at 1 and increasing by 1 for" + echo " flow (as specified by -f)." + echo " -s or --server hostname of netperf server. Used to create netperf" + echo " test traffic between to hosts (default is within host)" + echo " netserver must be running on the host." + echo " -S or --stats whether to update hbm stats (default is yes)." + echo " -t or --time duration of iperf3 in seconds (default=5)" + echo " -w Work conserving flag. cgroup can increase its" + echo " bandwidth beyond the rate limit specified" + echo " while there is available bandwidth. Current" + echo " implementation assumes there is only one NIC" + echo " (eth0), but can be extended to support multiple" + echo " NICs." + echo " cubic or dctcp specify which TCP CC to use" + echo " " + exit +} + +#set -x + +debug_flag=0 +args="$@" +name="$0" +netem=0 +cc=x +dir="-o" +dir_name="out" +dur=5 +flows=1 +id=1 +prog="" +port=5201 +rate=1000 +multi_iperf=0 +flow_cnt=1 +use_netperf=0 +rr=0 +ecn=0 +details=0 +server="" +qdisc="" +flags="" +do_stats=0 + +function start_hbm () { + rm -f hbm.out + echo "./hbm $dir -n $id -r $rate -t $dur $flags $dbg $prog" > hbm.out + echo " " >> hbm.out + ./hbm $dir -n $id -r $rate -t $dur $flags $dbg $prog >> hbm.out 2>&1 & + echo $! +} + +processArgs () { + for i in $args ; do + case $i in + # Support for upcomming ingress rate limiting + #in) # support for upcoming ingress rate limiting + # dir="-i" + # dir_name="in" + # ;; + out) + dir="-o" + dir_name="out" + ;; + -b=*|--bpf=*) + prog="${i#*=}" + ;; + -c=*|--cc=*) + cc="${i#*=}" + ;; + --debug) + flags="$flags -d" + debug_flag=1 + ;; + -d=*|--delay=*) + netem="${i#*=}" + ;; + -D) + details=1 + ;; + -E) + ecn=1 + ;; + # Support for upcomming fq Early Departure Time egress rate limiting + #--edt) + # prog="hbm_out_edt_kern.o" + # qdisc="fq" + # ;; + -f=*|--flows=*) + flows="${i#*=}" + ;; + -i=*|--id=*) + id="${i#*=}" + ;; + -l) + flags="$flags -l" + ;; + -N) + use_netperf=1 + ;; + -p=*|--port=*) + port="${i#*=}" + ;; + -P) + multi_iperf=1 + ;; + -q=*) + qdisc="${i#*=}" + ;; + -r=*|--rate=*) + rate="${i#*=}" + ;; + -R) + rr=1 + ;; + -s=*|--server=*) + server="${i#*=}" + ;; + -S|--stats) + flags="$flags -s" + do_stats=1 + ;; + -t=*|--time=*) + dur="${i#*=}" + ;; + -w) + flags="$flags -w" + ;; + cubic) + cc=cubic + ;; + dctcp) + cc=dctcp + ;; + *) + echo "Unknown arg:$i" + Usage + ;; + esac + done +} + +processArgs + +if [ $debug_flag -eq 1 ] ; then + rm -f hbm_out.log +fi + +hbm_pid=$(start_hbm) +usleep 100000 + +host=`hostname` +cg_base_dir=/sys/fs/cgroup +cg_dir="$cg_base_dir/cgroup-test-work-dir/hbm$id" + +echo $$ >> $cg_dir/cgroup.procs + +ulimit -l unlimited + +rm -f ss.out +rm -f hbm.[0-9]*.$dir_name +if [ $ecn -ne 0 ] ; then + sysctl -w -q -n net.ipv4.tcp_ecn=1 +fi + +if [ $use_netperf -eq 0 ] ; then + cur_cc=`sysctl -n net.ipv4.tcp_congestion_control` + if [ "$cc" != "x" ] ; then + sysctl -w -q -n net.ipv4.tcp_congestion_control=$cc + fi +fi + +if [ "$netem" -ne "0" ] ; then + if [ "$qdisc" != "" ] ; then + echo "WARNING: Ignoring -q options because -d option used" + fi + tc qdisc del dev lo root > /dev/null 2>&1 + tc qdisc add dev lo root netem delay $netem\ms > /dev/null 2>&1 +elif [ "$qdisc" != "" ] ; then + tc qdisc del dev lo root > /dev/null 2>&1 + tc qdisc add dev lo root $qdisc > /dev/null 2>&1 +fi + +n=0 +m=$[$dur * 5] +hn="::1" +if [ $use_netperf -ne 0 ] ; then + if [ "$server" != "" ] ; then + hn=$server + fi +fi + +( ping6 -i 0.2 -c $m $hn > ping.out 2>&1 ) & + +if [ $use_netperf -ne 0 ] ; then + begNetserverPid=`ps ax | grep netserver | grep --invert-match "grep" | \ + awk '{ print $1 }'` + if [ "$begNetserverPid" == "" ] ; then + if [ "$server" == "" ] ; then + ( ./netserver > /dev/null 2>&1) & + usleep 100000 + fi + fi + flow_cnt=1 + if [ "$server" == "" ] ; then + np_server=$host + else + np_server=$server + fi + if [ "$cc" == "x" ] ; then + np_cc="" + else + np_cc="-K $cc,$cc" + fi + replySize=1 + while [ $flow_cnt -le $flows ] ; do + if [ $rr -ne 0 ] ; then + reqSize=1M + if [ $flow_cnt -eq 1 ] ; then + reqSize=10K + fi + if [ "$dir" == "-i" ] ; then + replySize=$reqSize + reqSize=1 + fi + ( ./netperf -H $np_server -l $dur -f m -j -t TCP_RR -- -r $reqSize,$replySize $np_cc -k P50_lATENCY,P90_LATENCY,LOCAL_TRANSPORT_RETRANS,REMOTE_TRANSPORT_RETRANS,LOCAL_SEND_THROUGHPUT,LOCAL_RECV_THROUGHPUT,REQUEST_SIZE,RESPONSE_SIZE > netperf.$id.$flow_cnt ) & + else + if [ "$dir" == "-i" ] ; then + ( ./netperf -H $np_server -l $dur -f m -j -t TCP_RR -- -r 1,10M $np_cc -k P50_LATENCY,P90_LATENCY,LOCAL_TRANSPORT_RETRANS,LOCAL_SEND_THROUGHPUT,REMOTE_TRANSPORT_RETRANS,REMOTE_SEND_THROUGHPUT,REQUEST_SIZE,RESPONSE_SIZE > netperf.$id.$flow_cnt ) & + else + ( ./netperf -H $np_server -l $dur -f m -j -t TCP_STREAM -- $np_cc -k P50_lATENCY,P90_LATENCY,LOCAL_TRANSPORT_RETRANS,LOCAL_SEND_THROUGHPUT,REQUEST_SIZE,RESPONSE_SIZE > netperf.$id.$flow_cnt ) & + fi + fi + flow_cnt=$[flow_cnt+1] + done + +# sleep for duration of test (plus some buffer) + n=$[dur+2] + sleep $n + +# force graceful termination of netperf + pids=`pgrep netperf` + for p in $pids ; do + kill -SIGALRM $p + done + + flow_cnt=1 + rate=0 + if [ $details -ne 0 ] ; then + echo "" + echo "Details for HBM in cgroup $id" + if [ $do_stats -eq 1 ] ; then + if [ -e hbm.$id.$dir_name ] ; then + cat hbm.$id.$dir_name + fi + fi + fi + while [ $flow_cnt -le $flows ] ; do + if [ "$dir" == "-i" ] ; then + r=`cat netperf.$id.$flow_cnt | grep -o "REMOTE_SEND_THROUGHPUT=[0-9]*" | grep -o "[0-9]*"` + else + r=`cat netperf.$id.$flow_cnt | grep -o "LOCAL_SEND_THROUGHPUT=[0-9]*" | grep -o "[0-9]*"` + fi + echo "rate for flow $flow_cnt: $r" + rate=$[rate+r] + if [ $details -ne 0 ] ; then + echo "-----" + echo "Details for cgroup $id, flow $flow_cnt" + cat netperf.$id.$flow_cnt + fi + flow_cnt=$[flow_cnt+1] + done + if [ $details -ne 0 ] ; then + echo "" + delay=`grep "avg" ping.out | grep -o "= [0-9.]*/[0-9.]*" | grep -o "[0-9.]*$"` + echo "PING AVG DELAY:$delay" + echo "AGGREGATE_GOODPUT:$rate" + else + echo $rate + fi +elif [ $multi_iperf -eq 0 ] ; then + (iperf3 -s -p $port -1 > /dev/null 2>&1) & + usleep 100000 + iperf3 -c $host -p $port -i 0 -P $flows -f m -t $dur > iperf.$id + rates=`grep receiver iperf.$id | grep -o "[0-9.]* Mbits" | grep -o "^[0-9]*"` + rate=`echo $rates | grep -o "[0-9]*$"` + + if [ $details -ne 0 ] ; then + echo "" + echo "Details for HBM in cgroup $id" + if [ $do_stats -eq 1 ] ; then + if [ -e hbm.$id.$dir_name ] ; then + cat hbm.$id.$dir_name + fi + fi + delay=`grep "avg" ping.out | grep -o "= [0-9.]*/[0-9.]*" | grep -o "[0-9.]*$"` + echo "PING AVG DELAY:$delay" + echo "AGGREGATE_GOODPUT:$rate" + else + echo $rate + fi +else + flow_cnt=1 + while [ $flow_cnt -le $flows ] ; do + (iperf3 -s -p $port -1 > /dev/null 2>&1) & + ( iperf3 -c $host -p $port -i 0 -P 1 -f m -t $dur | grep receiver | grep -o "[0-9.]* Mbits" | grep -o "^[0-9]*" | grep -o "[0-9]*$" > iperf3.$id.$flow_cnt ) & + port=$[port+1] + flow_cnt=$[flow_cnt+1] + done + n=$[dur+1] + sleep $n + flow_cnt=1 + rate=0 + if [ $details -ne 0 ] ; then + echo "" + echo "Details for HBM in cgroup $id" + if [ $do_stats -eq 1 ] ; then + if [ -e hbm.$id.$dir_name ] ; then + cat hbm.$id.$dir_name + fi + fi + fi + + while [ $flow_cnt -le $flows ] ; do + r=`cat iperf3.$id.$flow_cnt` +# echo "rate for flow $flow_cnt: $r" + if [ $details -ne 0 ] ; then + echo "Rate for cgroup $id, flow $flow_cnt LOCAL_SEND_THROUGHPUT=$r" + fi + rate=$[rate+r] + flow_cnt=$[flow_cnt+1] + done + if [ $details -ne 0 ] ; then + delay=`grep "avg" ping.out | grep -o "= [0-9.]*/[0-9.]*" | grep -o "[0-9.]*$"` + echo "PING AVG DELAY:$delay" + echo "AGGREGATE_GOODPUT:$rate" + else + echo $rate + fi +fi + +if [ $use_netperf -eq 0 ] ; then + sysctl -w -q -n net.ipv4.tcp_congestion_control=$cur_cc +fi +if [ $ecn -ne 0 ] ; then + sysctl -w -q -n net.ipv4.tcp_ecn=0 +fi +if [ "$netem" -ne "0" ] ; then + tc qdisc del dev lo root > /dev/null 2>&1 +fi + +sleep 2 + +hbmPid=`ps ax | grep "hbm " | grep --invert-match "grep" | awk '{ print $1 }'` +if [ "$hbmPid" == "$hbm_pid" ] ; then + kill $hbm_pid +fi + +sleep 1 + +# Detach any BPF programs that may have lingered +ttx=`bpftool cgroup tree | grep hbm` +v=2 +for x in $ttx ; do + if [ "${x:0:36}" == "/sys/fs/cgroup/cgroup-test-work-dir/" ] ; then + cg=$x ; v=0 + else + if [ $v -eq 0 ] ; then + id=$x ; v=1 + else + if [ $v -eq 1 ] ; then + type=$x ; bpftool cgroup detach $cg $type id $id + v=0 + fi + fi + fi +done + +if [ $use_netperf -ne 0 ] ; then + if [ "$server" == "" ] ; then + if [ "$begNetserverPid" == "" ] ; then + netserverPid=`ps ax | grep netserver | grep --invert-match "grep" | awk '{ print $1 }'` + if [ "$netserverPid" != "" ] ; then + kill $netserverPid + fi + fi + fi +fi +exit diff --git a/samples/bpf/fds_example.c b/samples/bpf/fds_example.c index 9854854f05d1..e51eb060244e 100644 --- a/samples/bpf/fds_example.c +++ b/samples/bpf/fds_example.c @@ -14,8 +14,8 @@ #include <bpf/bpf.h> +#include "bpf/libbpf.h" #include "bpf_insn.h" -#include "bpf_load.h" #include "sock_example.h" #define BPF_F_PIN (1 << 0) @@ -57,10 +57,14 @@ static int bpf_prog_create(const char *object) BPF_EXIT_INSN(), }; size_t insns_cnt = sizeof(insns) / sizeof(struct bpf_insn); + char bpf_log_buf[BPF_LOG_BUF_SIZE]; + struct bpf_object *obj; + int prog_fd; if (object) { - assert(!load_bpf_file((char *)object)); - return prog_fd[0]; + assert(!bpf_prog_load(object, BPF_PROG_TYPE_UNSPEC, + &obj, &prog_fd)); + return prog_fd; } else { return bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER, insns, insns_cnt, "GPL", 0, diff --git a/samples/bpf/hbm.c b/samples/bpf/hbm.c new file mode 100644 index 000000000000..8408ccb7409f --- /dev/null +++ b/samples/bpf/hbm.c @@ -0,0 +1,441 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * Example program for Host Bandwidth Managment + * + * This program loads a cgroup skb BPF program to enforce cgroup output + * (egress) or input (ingress) bandwidth limits. + * + * USAGE: hbm [-d] [-l] [-n <id>] [-r <rate>] [-s] [-t <secs>] [-w] [-h] [prog] + * Where: + * -d Print BPF trace debug buffer + * -l Also limit flows doing loopback + * -n <#> To create cgroup \"/hbm#\" and attach prog + * Default is /hbm1 + * -r <rate> Rate limit in Mbps + * -s Get HBM stats (marked, dropped, etc.) + * -t <time> Exit after specified seconds (deault is 0) + * -w Work conserving flag. cgroup can increase its bandwidth + * beyond the rate limit specified while there is available + * bandwidth. Current implementation assumes there is only + * NIC (eth0), but can be extended to support multiple NICs. + * Currrently only supported for egress. + * -h Print this info + * prog BPF program file name. Name defaults to hbm_out_kern.o + */ + +#define _GNU_SOURCE + +#include <stdio.h> +#include <stdlib.h> +#include <assert.h> +#include <sys/resource.h> +#include <sys/time.h> +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> +#include <linux/unistd.h> + +#include <linux/bpf.h> +#include <bpf/bpf.h> + +#include "bpf_load.h" +#include "bpf_rlimit.h" +#include "cgroup_helpers.h" +#include "hbm.h" +#include "bpf_util.h" +#include "bpf/bpf.h" +#include "bpf/libbpf.h" + +bool outFlag = true; +int minRate = 1000; /* cgroup rate limit in Mbps */ +int rate = 1000; /* can grow if rate conserving is enabled */ +int dur = 1; +bool stats_flag; +bool loopback_flag; +bool debugFlag; +bool work_conserving_flag; + +static void Usage(void); +static void read_trace_pipe2(void); +static void do_error(char *msg, bool errno_flag); + +#define DEBUGFS "/sys/kernel/debug/tracing/" + +struct bpf_object *obj; +int bpfprog_fd; +int cgroup_storage_fd; + +static void read_trace_pipe2(void) +{ + int trace_fd; + FILE *outf; + char *outFname = "hbm_out.log"; + + trace_fd = open(DEBUGFS "trace_pipe", O_RDONLY, 0); + if (trace_fd < 0) { + printf("Error opening trace_pipe\n"); + return; + } + +// Future support of ingress +// if (!outFlag) +// outFname = "hbm_in.log"; + outf = fopen(outFname, "w"); + + if (outf == NULL) + printf("Error creating %s\n", outFname); + + while (1) { + static char buf[4097]; + ssize_t sz; + + sz = read(trace_fd, buf, sizeof(buf) - 1); + if (sz > 0) { + buf[sz] = 0; + puts(buf); + if (outf != NULL) { + fprintf(outf, "%s\n", buf); + fflush(outf); + } + } + } +} + +static void do_error(char *msg, bool errno_flag) +{ + if (errno_flag) + printf("ERROR: %s, errno: %d\n", msg, errno); + else + printf("ERROR: %s\n", msg); + exit(1); +} + +static int prog_load(char *prog) +{ + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_CGROUP_SKB, + .file = prog, + .expected_attach_type = BPF_CGROUP_INET_EGRESS, + }; + int map_fd; + struct bpf_map *map; + + int ret = 0; + + if (access(prog, O_RDONLY) < 0) { + printf("Error accessing file %s: %s\n", prog, strerror(errno)); + return 1; + } + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &bpfprog_fd)) + ret = 1; + if (!ret) { + map = bpf_object__find_map_by_name(obj, "queue_stats"); + map_fd = bpf_map__fd(map); + if (map_fd < 0) { + printf("Map not found: %s\n", strerror(map_fd)); + ret = 1; + } + } + + if (ret) { + printf("ERROR: load_bpf_file failed for: %s\n", prog); + printf(" Output from verifier:\n%s\n------\n", bpf_log_buf); + ret = -1; + } else { + ret = map_fd; + } + + return ret; +} + +static int run_bpf_prog(char *prog, int cg_id) +{ + int map_fd; + int rc = 0; + int key = 0; + int cg1 = 0; + int type = BPF_CGROUP_INET_EGRESS; + char cg_dir[100]; + struct hbm_queue_stats qstats = {0}; + + sprintf(cg_dir, "/hbm%d", cg_id); + map_fd = prog_load(prog); + if (map_fd == -1) + return 1; + + if (setup_cgroup_environment()) { + printf("ERROR: setting cgroup environment\n"); + goto err; + } + cg1 = create_and_get_cgroup(cg_dir); + if (!cg1) { + printf("ERROR: create_and_get_cgroup\n"); + goto err; + } + if (join_cgroup(cg_dir)) { + printf("ERROR: join_cgroup\n"); + goto err; + } + + qstats.rate = rate; + qstats.stats = stats_flag ? 1 : 0; + qstats.loopback = loopback_flag ? 1 : 0; + if (bpf_map_update_elem(map_fd, &key, &qstats, BPF_ANY)) { + printf("ERROR: Could not update map element\n"); + goto err; + } + + if (!outFlag) + type = BPF_CGROUP_INET_INGRESS; + if (bpf_prog_attach(bpfprog_fd, cg1, type, 0)) { + printf("ERROR: bpf_prog_attach fails!\n"); + log_err("Attaching prog"); + goto err; + } + + if (work_conserving_flag) { + struct timeval t0, t_last, t_new; + FILE *fin; + unsigned long long last_eth_tx_bytes, new_eth_tx_bytes; + signed long long last_cg_tx_bytes, new_cg_tx_bytes; + signed long long delta_time, delta_bytes, delta_rate; + int delta_ms; +#define DELTA_RATE_CHECK 10000 /* in us */ +#define RATE_THRESHOLD 9500000000 /* 9.5 Gbps */ + + bpf_map_lookup_elem(map_fd, &key, &qstats); + if (gettimeofday(&t0, NULL) < 0) + do_error("gettimeofday failed", true); + t_last = t0; + fin = fopen("/sys/class/net/eth0/statistics/tx_bytes", "r"); + if (fscanf(fin, "%llu", &last_eth_tx_bytes) != 1) + do_error("fscanf fails", false); + fclose(fin); + last_cg_tx_bytes = qstats.bytes_total; + while (true) { + usleep(DELTA_RATE_CHECK); + if (gettimeofday(&t_new, NULL) < 0) + do_error("gettimeofday failed", true); + delta_ms = (t_new.tv_sec - t0.tv_sec) * 1000 + + (t_new.tv_usec - t0.tv_usec)/1000; + if (delta_ms > dur * 1000) + break; + delta_time = (t_new.tv_sec - t_last.tv_sec) * 1000000 + + (t_new.tv_usec - t_last.tv_usec); + if (delta_time == 0) + continue; + t_last = t_new; + fin = fopen("/sys/class/net/eth0/statistics/tx_bytes", + "r"); + if (fscanf(fin, "%llu", &new_eth_tx_bytes) != 1) + do_error("fscanf fails", false); + fclose(fin); + printf(" new_eth_tx_bytes:%llu\n", + new_eth_tx_bytes); + bpf_map_lookup_elem(map_fd, &key, &qstats); + new_cg_tx_bytes = qstats.bytes_total; + delta_bytes = new_eth_tx_bytes - last_eth_tx_bytes; + last_eth_tx_bytes = new_eth_tx_bytes; + delta_rate = (delta_bytes * 8000000) / delta_time; + printf("%5d - eth_rate:%.1fGbps cg_rate:%.3fGbps", + delta_ms, delta_rate/1000000000.0, + rate/1000.0); + if (delta_rate < RATE_THRESHOLD) { + /* can increase cgroup rate limit, but first + * check if we are using the current limit. + * Currently increasing by 6.25%, unknown + * if that is the optimal rate. + */ + int rate_diff100; + + delta_bytes = new_cg_tx_bytes - + last_cg_tx_bytes; + last_cg_tx_bytes = new_cg_tx_bytes; + delta_rate = (delta_bytes * 8000000) / + delta_time; + printf(" rate:%.3fGbps", + delta_rate/1000000000.0); + rate_diff100 = (((long long)rate)*1000000 - + delta_rate) * 100 / + (((long long) rate) * 1000000); + printf(" rdiff:%d", rate_diff100); + if (rate_diff100 <= 3) { + rate += (rate >> 4); + if (rate > RATE_THRESHOLD / 1000000) + rate = RATE_THRESHOLD / 1000000; + qstats.rate = rate; + printf(" INC\n"); + } else { + printf("\n"); + } + } else { + /* Need to decrease cgroup rate limit. + * Currently decreasing by 12.5%, unknown + * if that is optimal + */ + printf(" DEC\n"); + rate -= (rate >> 3); + if (rate < minRate) + rate = minRate; + qstats.rate = rate; + } + if (bpf_map_update_elem(map_fd, &key, &qstats, BPF_ANY)) + do_error("update map element fails", false); + } + } else { + sleep(dur); + } + // Get stats! + if (stats_flag && bpf_map_lookup_elem(map_fd, &key, &qstats)) { + char fname[100]; + FILE *fout; + + if (!outFlag) + sprintf(fname, "hbm.%d.in", cg_id); + else + sprintf(fname, "hbm.%d.out", cg_id); + fout = fopen(fname, "w"); + fprintf(fout, "id:%d\n", cg_id); + fprintf(fout, "ERROR: Could not lookup queue_stats\n"); + } else if (stats_flag && qstats.lastPacketTime > + qstats.firstPacketTime) { + long long delta_us = (qstats.lastPacketTime - + qstats.firstPacketTime)/1000; + unsigned int rate_mbps = ((qstats.bytes_total - + qstats.bytes_dropped) * 8 / + delta_us); + double percent_pkts, percent_bytes; + char fname[100]; + FILE *fout; + +// Future support of ingress +// if (!outFlag) +// sprintf(fname, "hbm.%d.in", cg_id); +// else + sprintf(fname, "hbm.%d.out", cg_id); + fout = fopen(fname, "w"); + fprintf(fout, "id:%d\n", cg_id); + fprintf(fout, "rate_mbps:%d\n", rate_mbps); + fprintf(fout, "duration:%.1f secs\n", + (qstats.lastPacketTime - qstats.firstPacketTime) / + 1000000000.0); + fprintf(fout, "packets:%d\n", (int)qstats.pkts_total); + fprintf(fout, "bytes_MB:%d\n", (int)(qstats.bytes_total / + 1000000)); + fprintf(fout, "pkts_dropped:%d\n", (int)qstats.pkts_dropped); + fprintf(fout, "bytes_dropped_MB:%d\n", + (int)(qstats.bytes_dropped / + 1000000)); + // Marked Pkts and Bytes + percent_pkts = (qstats.pkts_marked * 100.0) / + (qstats.pkts_total + 1); + percent_bytes = (qstats.bytes_marked * 100.0) / + (qstats.bytes_total + 1); + fprintf(fout, "pkts_marked_percent:%6.2f\n", percent_pkts); + fprintf(fout, "bytes_marked_percent:%6.2f\n", percent_bytes); + + // Dropped Pkts and Bytes + percent_pkts = (qstats.pkts_dropped * 100.0) / + (qstats.pkts_total + 1); + percent_bytes = (qstats.bytes_dropped * 100.0) / + (qstats.bytes_total + 1); + fprintf(fout, "pkts_dropped_percent:%6.2f\n", percent_pkts); + fprintf(fout, "bytes_dropped_percent:%6.2f\n", percent_bytes); + fclose(fout); + } + + if (debugFlag) + read_trace_pipe2(); + return rc; +err: + rc = 1; + + if (cg1) + close(cg1); + cleanup_cgroup_environment(); + + return rc; +} + +static void Usage(void) +{ + printf("This program loads a cgroup skb BPF program to enforce\n" + "cgroup output (egress) bandwidth limits.\n\n" + "USAGE: hbm [-o] [-d] [-l] [-n <id>] [-r <rate>] [-s]\n" + " [-t <secs>] [-w] [-h] [prog]\n" + " Where:\n" + " -o indicates egress direction (default)\n" + " -d print BPF trace debug buffer\n" + " -l also limit flows using loopback\n" + " -n <#> to create cgroup \"/hbm#\" and attach prog\n" + " Default is /hbm1\n" + " -r <rate> Rate in Mbps\n" + " -s Update HBM stats\n" + " -t <time> Exit after specified seconds (deault is 0)\n" + " -w Work conserving flag. cgroup can increase\n" + " bandwidth beyond the rate limit specified\n" + " while there is available bandwidth. Current\n" + " implementation assumes there is only eth0\n" + " but can be extended to support multiple NICs\n" + " -h print this info\n" + " prog BPF program file name. Name defaults to\n" + " hbm_out_kern.o\n"); +} + +int main(int argc, char **argv) +{ + char *prog = "hbm_out_kern.o"; + int k; + int cg_id = 1; + char *optstring = "iodln:r:st:wh"; + + while ((k = getopt(argc, argv, optstring)) != -1) { + switch (k) { + case'o': + break; + case 'd': + debugFlag = true; + break; + case 'l': + loopback_flag = true; + break; + case 'n': + cg_id = atoi(optarg); + break; + case 'r': + minRate = atoi(optarg) * 1.024; + rate = minRate; + break; + case 's': + stats_flag = true; + break; + case 't': + dur = atoi(optarg); + break; + case 'w': + work_conserving_flag = true; + break; + case '?': + if (optopt == 'n' || optopt == 'r' || optopt == 't') + fprintf(stderr, + "Option -%c requires an argument.\n\n", + optopt); + case 'h': + // fallthrough + default: + Usage(); + return 0; + } + } + + if (optind < argc) + prog = argv[optind]; + printf("HBM prog: %s\n", prog != NULL ? prog : "NULL"); + + return run_bpf_prog(prog, cg_id); +} diff --git a/samples/bpf/hbm.h b/samples/bpf/hbm.h new file mode 100644 index 000000000000..518e8147d084 --- /dev/null +++ b/samples/bpf/hbm.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (c) 2019 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * Include file for Host Bandwidth Management (HBM) programs + */ +struct hbm_vqueue { + struct bpf_spin_lock lock; + /* 4 byte hole */ + unsigned long long lasttime; /* In ns */ + int credit; /* In bytes */ + unsigned int rate; /* In bytes per NS << 20 */ +}; + +struct hbm_queue_stats { + unsigned long rate; /* in Mbps*/ + unsigned long stats:1, /* get HBM stats (marked, dropped,..) */ + loopback:1; /* also limit flows using loopback */ + unsigned long long pkts_marked; + unsigned long long bytes_marked; + unsigned long long pkts_dropped; + unsigned long long bytes_dropped; + unsigned long long pkts_total; + unsigned long long bytes_total; + unsigned long long firstPacketTime; + unsigned long long lastPacketTime; +}; diff --git a/samples/bpf/hbm_kern.h b/samples/bpf/hbm_kern.h new file mode 100644 index 000000000000..c5635d924193 --- /dev/null +++ b/samples/bpf/hbm_kern.h @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (c) 2019 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * Include file for sample Host Bandwidth Manager (HBM) BPF programs + */ +#define KBUILD_MODNAME "foo" +#include <stddef.h> +#include <stdbool.h> +#include <uapi/linux/bpf.h> +#include <uapi/linux/if_ether.h> +#include <uapi/linux/if_packet.h> +#include <uapi/linux/ip.h> +#include <uapi/linux/ipv6.h> +#include <uapi/linux/in.h> +#include <uapi/linux/tcp.h> +#include <uapi/linux/filter.h> +#include <uapi/linux/pkt_cls.h> +#include <net/ipv6.h> +#include <net/inet_ecn.h> +#include "bpf_endian.h" +#include "bpf_helpers.h" +#include "hbm.h" + +#define DROP_PKT 0 +#define ALLOW_PKT 1 +#define TCP_ECN_OK 1 + +#define HBM_DEBUG 0 // Set to 1 to enable debugging +#if HBM_DEBUG +#define bpf_printk(fmt, ...) \ +({ \ + char ____fmt[] = fmt; \ + bpf_trace_printk(____fmt, sizeof(____fmt), \ + ##__VA_ARGS__); \ +}) +#else +#define bpf_printk(fmt, ...) +#endif + +#define INITIAL_CREDIT_PACKETS 100 +#define MAX_BYTES_PER_PACKET 1500 +#define MARK_THRESH (40 * MAX_BYTES_PER_PACKET) +#define DROP_THRESH (80 * 5 * MAX_BYTES_PER_PACKET) +#define LARGE_PKT_DROP_THRESH (DROP_THRESH - (15 * MAX_BYTES_PER_PACKET)) +#define MARK_REGION_SIZE (LARGE_PKT_DROP_THRESH - MARK_THRESH) +#define LARGE_PKT_THRESH 120 +#define MAX_CREDIT (100 * MAX_BYTES_PER_PACKET) +#define INIT_CREDIT (INITIAL_CREDIT_PACKETS * MAX_BYTES_PER_PACKET) + +// rate in bytes per ns << 20 +#define CREDIT_PER_NS(delta, rate) ((((u64)(delta)) * (rate)) >> 20) + +struct bpf_map_def SEC("maps") queue_state = { + .type = BPF_MAP_TYPE_CGROUP_STORAGE, + .key_size = sizeof(struct bpf_cgroup_storage_key), + .value_size = sizeof(struct hbm_vqueue), +}; +BPF_ANNOTATE_KV_PAIR(queue_state, struct bpf_cgroup_storage_key, + struct hbm_vqueue); + +struct bpf_map_def SEC("maps") queue_stats = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(u32), + .value_size = sizeof(struct hbm_queue_stats), + .max_entries = 1, +}; +BPF_ANNOTATE_KV_PAIR(queue_stats, int, struct hbm_queue_stats); + +struct hbm_pkt_info { + bool is_ip; + bool is_tcp; + short ecn; +}; + +static __always_inline void hbm_get_pkt_info(struct __sk_buff *skb, + struct hbm_pkt_info *pkti) +{ + struct iphdr iph; + struct ipv6hdr *ip6h; + + bpf_skb_load_bytes(skb, 0, &iph, 12); + if (iph.version == 6) { + ip6h = (struct ipv6hdr *)&iph; + pkti->is_ip = true; + pkti->is_tcp = (ip6h->nexthdr == 6); + pkti->ecn = (ip6h->flow_lbl[0] >> 4) & INET_ECN_MASK; + } else if (iph.version == 4) { + pkti->is_ip = true; + pkti->is_tcp = (iph.protocol == 6); + pkti->ecn = iph.tos & INET_ECN_MASK; + } else { + pkti->is_ip = false; + pkti->is_tcp = false; + pkti->ecn = 0; + } +} + +static __always_inline void hbm_init_vqueue(struct hbm_vqueue *qdp, int rate) +{ + bpf_printk("Initializing queue_state, rate:%d\n", rate * 128); + qdp->lasttime = bpf_ktime_get_ns(); + qdp->credit = INIT_CREDIT; + qdp->rate = rate * 128; +} + +static __always_inline void hbm_update_stats(struct hbm_queue_stats *qsp, + int len, + unsigned long long curtime, + bool congestion_flag, + bool drop_flag) +{ + if (qsp != NULL) { + // Following is needed for work conserving + __sync_add_and_fetch(&(qsp->bytes_total), len); + if (qsp->stats) { + // Optionally update statistics + if (qsp->firstPacketTime == 0) + qsp->firstPacketTime = curtime; + qsp->lastPacketTime = curtime; + __sync_add_and_fetch(&(qsp->pkts_total), 1); + if (congestion_flag || drop_flag) { + __sync_add_and_fetch(&(qsp->pkts_marked), 1); + __sync_add_and_fetch(&(qsp->bytes_marked), len); + } + if (drop_flag) { + __sync_add_and_fetch(&(qsp->pkts_dropped), 1); + __sync_add_and_fetch(&(qsp->bytes_dropped), + len); + } + } + } +} diff --git a/samples/bpf/hbm_out_kern.c b/samples/bpf/hbm_out_kern.c new file mode 100644 index 000000000000..f806863d0b79 --- /dev/null +++ b/samples/bpf/hbm_out_kern.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * Sample Host Bandwidth Manager (HBM) BPF program. + * + * A cgroup skb BPF egress program to limit cgroup output bandwidth. + * It uses a modified virtual token bucket queue to limit average + * egress bandwidth. The implementation uses credits instead of tokens. + * Negative credits imply that queueing would have happened (this is + * a virtual queue, so no queueing is done by it. However, queueing may + * occur at the actual qdisc (which is not used for rate limiting). + * + * This implementation uses 3 thresholds, one to start marking packets and + * the other two to drop packets: + * CREDIT + * - <--------------------------|------------------------> + + * | | | 0 + * | Large pkt | + * | drop thresh | + * Small pkt drop Mark threshold + * thresh + * + * The effect of marking depends on the type of packet: + * a) If the packet is ECN enabled and it is a TCP packet, then the packet + * is ECN marked. + * b) If the packet is a TCP packet, then we probabilistically call tcp_cwr + * to reduce the congestion window. The current implementation uses a linear + * distribution (0% probability at marking threshold, 100% probability + * at drop threshold). + * c) If the packet is not a TCP packet, then it is dropped. + * + * If the credit is below the drop threshold, the packet is dropped. If it + * is a TCP packet, then it also calls tcp_cwr since packets dropped by + * by a cgroup skb BPF program do not automatically trigger a call to + * tcp_cwr in the current kernel code. + * + * This BPF program actually uses 2 drop thresholds, one threshold + * for larger packets (>= 120 bytes) and another for smaller packets. This + * protects smaller packets such as SYNs, ACKs, etc. + * + * The default bandwidth limit is set at 1Gbps but this can be changed by + * a user program through a shared BPF map. In addition, by default this BPF + * program does not limit connections using loopback. This behavior can be + * overwritten by the user program. There is also an option to calculate + * some statistics, such as percent of packets marked or dropped, which + * the user program can access. + * + * A latter patch provides such a program (hbm.c) + */ + +#include "hbm_kern.h" + +SEC("cgroup_skb/egress") +int _hbm_out_cg(struct __sk_buff *skb) +{ + struct hbm_pkt_info pkti; + int len = skb->len; + unsigned int queue_index = 0; + unsigned long long curtime; + int credit; + signed long long delta = 0, zero = 0; + int max_credit = MAX_CREDIT; + bool congestion_flag = false; + bool drop_flag = false; + bool cwr_flag = false; + struct hbm_vqueue *qdp; + struct hbm_queue_stats *qsp = NULL; + int rv = ALLOW_PKT; + + qsp = bpf_map_lookup_elem(&queue_stats, &queue_index); + if (qsp != NULL && !qsp->loopback && (skb->ifindex == 1)) + return ALLOW_PKT; + + hbm_get_pkt_info(skb, &pkti); + + // We may want to account for the length of headers in len + // calculation, like ETH header + overhead, specially if it + // is a gso packet. But I am not doing it right now. + + qdp = bpf_get_local_storage(&queue_state, 0); + if (!qdp) + return ALLOW_PKT; + else if (qdp->lasttime == 0) + hbm_init_vqueue(qdp, 1024); + + curtime = bpf_ktime_get_ns(); + + // Begin critical section + bpf_spin_lock(&qdp->lock); + credit = qdp->credit; + delta = curtime - qdp->lasttime; + /* delta < 0 implies that another process with a curtime greater + * than ours beat us to the critical section and already added + * the new credit, so we should not add it ourselves + */ + if (delta > 0) { + qdp->lasttime = curtime; + credit += CREDIT_PER_NS(delta, qdp->rate); + if (credit > MAX_CREDIT) + credit = MAX_CREDIT; + } + credit -= len; + qdp->credit = credit; + bpf_spin_unlock(&qdp->lock); + // End critical section + + // Check if we should update rate + if (qsp != NULL && (qsp->rate * 128) != qdp->rate) { + qdp->rate = qsp->rate * 128; + bpf_printk("Updating rate: %d (1sec:%llu bits)\n", + (int)qdp->rate, + CREDIT_PER_NS(1000000000, qdp->rate) * 8); + } + + // Set flags (drop, congestion, cwr) + // Dropping => we are congested, so ignore congestion flag + if (credit < -DROP_THRESH || + (len > LARGE_PKT_THRESH && + credit < -LARGE_PKT_DROP_THRESH)) { + // Very congested, set drop flag + drop_flag = true; + } else if (credit < 0) { + // Congested, set congestion flag + if (pkti.ecn) { + if (credit < -MARK_THRESH) + congestion_flag = true; + else + congestion_flag = false; + } else { + congestion_flag = true; + } + } + + if (congestion_flag) { + if (!bpf_skb_ecn_set_ce(skb)) { + if (len > LARGE_PKT_THRESH) { + // Problem if too many small packets? + drop_flag = true; + } + } + } + + if (drop_flag) + rv = DROP_PKT; + + hbm_update_stats(qsp, len, curtime, congestion_flag, drop_flag); + + if (rv == DROP_PKT) + __sync_add_and_fetch(&(qdp->credit), len); + + return rv; +} +char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/load_sock_ops.c b/samples/bpf/load_sock_ops.c deleted file mode 100644 index 8ecb41ea0c03..000000000000 --- a/samples/bpf/load_sock_ops.c +++ /dev/null @@ -1,97 +0,0 @@ -/* Copyright (c) 2017 Facebook - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - */ -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <linux/bpf.h> -#include <bpf/bpf.h> -#include "bpf_load.h" -#include <unistd.h> -#include <errno.h> -#include <fcntl.h> -#include <linux/unistd.h> - -static void usage(char *pname) -{ - printf("USAGE:\n %s [-l] <cg-path> <prog filename>\n", pname); - printf("\tLoad and attach a sock_ops program to the specified " - "cgroup\n"); - printf("\tIf \"-l\" is used, the program will continue to run\n"); - printf("\tprinting the BPF log buffer\n"); - printf("\tIf the specified filename does not end in \".o\", it\n"); - printf("\tappends \"_kern.o\" to the name\n"); - printf("\n"); - printf(" %s -r <cg-path>\n", pname); - printf("\tDetaches the currently attached sock_ops program\n"); - printf("\tfrom the specified cgroup\n"); - printf("\n"); - exit(1); -} - -int main(int argc, char **argv) -{ - int logFlag = 0; - int error = 0; - char *cg_path; - char fn[500]; - char *prog; - int cg_fd; - - if (argc < 3) - usage(argv[0]); - - if (!strcmp(argv[1], "-r")) { - cg_path = argv[2]; - cg_fd = open(cg_path, O_DIRECTORY, O_RDONLY); - error = bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS); - if (error) { - printf("ERROR: bpf_prog_detach: %d (%s)\n", - error, strerror(errno)); - return 2; - } - return 0; - } else if (!strcmp(argv[1], "-h")) { - usage(argv[0]); - } else if (!strcmp(argv[1], "-l")) { - logFlag = 1; - if (argc < 4) - usage(argv[0]); - } - - prog = argv[argc - 1]; - cg_path = argv[argc - 2]; - if (strlen(prog) > 480) { - fprintf(stderr, "ERROR: program name too long (> 480 chars)\n"); - return 3; - } - cg_fd = open(cg_path, O_DIRECTORY, O_RDONLY); - - if (!strcmp(prog + strlen(prog)-2, ".o")) - strcpy(fn, prog); - else - sprintf(fn, "%s_kern.o", prog); - if (logFlag) - printf("loading bpf file:%s\n", fn); - if (load_bpf_file(fn)) { - printf("ERROR: load_bpf_file failed for: %s\n", fn); - printf("%s", bpf_log_buf); - return 4; - } - if (logFlag) - printf("TCP BPF Loaded %s\n", fn); - - error = bpf_prog_attach(prog_fd[0], cg_fd, BPF_CGROUP_SOCK_OPS, 0); - if (error) { - printf("ERROR: bpf_prog_attach: %d (%s)\n", - error, strerror(errno)); - return 5; - } else if (logFlag) { - read_trace_pipe(); - } - - return error; -} diff --git a/samples/bpf/sock_example.c b/samples/bpf/sock_example.c index 60ec467c78ab..00aae1d33fca 100644 --- a/samples/bpf/sock_example.c +++ b/samples/bpf/sock_example.c @@ -99,7 +99,7 @@ int main(void) { FILE *f; - f = popen("ping -c5 localhost", "r"); + f = popen("ping -4 -c5 localhost", "r"); (void)f; return test_sock(); diff --git a/samples/bpf/sockex1_user.c b/samples/bpf/sockex1_user.c index 93ec01c56104..7f90796ae15a 100644 --- a/samples/bpf/sockex1_user.c +++ b/samples/bpf/sockex1_user.c @@ -3,30 +3,33 @@ #include <assert.h> #include <linux/bpf.h> #include <bpf/bpf.h> -#include "bpf_load.h" +#include "bpf/libbpf.h" #include "sock_example.h" #include <unistd.h> #include <arpa/inet.h> int main(int ac, char **argv) { + struct bpf_object *obj; + int map_fd, prog_fd; char filename[256]; - FILE *f; int i, sock; + FILE *f; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - if (load_bpf_file(filename)) { - printf("%s", bpf_log_buf); + if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER, + &obj, &prog_fd)) return 1; - } + + map_fd = bpf_object__find_map_fd_by_name(obj, "my_map"); sock = open_raw_sock("lo"); - assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd, - sizeof(prog_fd[0])) == 0); + assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, + sizeof(prog_fd)) == 0); - f = popen("ping -c5 localhost", "r"); + f = popen("ping -4 -c5 localhost", "r"); (void) f; for (i = 0; i < 5; i++) { @@ -34,13 +37,13 @@ int main(int ac, char **argv) int key; key = IPPROTO_TCP; - assert(bpf_map_lookup_elem(map_fd[0], &key, &tcp_cnt) == 0); + assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0); key = IPPROTO_UDP; - assert(bpf_map_lookup_elem(map_fd[0], &key, &udp_cnt) == 0); + assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0); key = IPPROTO_ICMP; - assert(bpf_map_lookup_elem(map_fd[0], &key, &icmp_cnt) == 0); + assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0); printf("TCP %lld UDP %lld ICMP %lld bytes\n", tcp_cnt, udp_cnt, icmp_cnt); diff --git a/samples/bpf/sockex2_user.c b/samples/bpf/sockex2_user.c index 1d5c6e9a6d27..bc257333ad92 100644 --- a/samples/bpf/sockex2_user.c +++ b/samples/bpf/sockex2_user.c @@ -3,7 +3,7 @@ #include <assert.h> #include <linux/bpf.h> #include <bpf/bpf.h> -#include "bpf_load.h" +#include "bpf/libbpf.h" #include "sock_example.h" #include <unistd.h> #include <arpa/inet.h> @@ -17,32 +17,35 @@ struct pair { int main(int ac, char **argv) { struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; + struct bpf_object *obj; + int map_fd, prog_fd; char filename[256]; - FILE *f; int i, sock; + FILE *f; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); setrlimit(RLIMIT_MEMLOCK, &r); - if (load_bpf_file(filename)) { - printf("%s", bpf_log_buf); + if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER, + &obj, &prog_fd)) return 1; - } + + map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map"); sock = open_raw_sock("lo"); - assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd, - sizeof(prog_fd[0])) == 0); + assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, + sizeof(prog_fd)) == 0); - f = popen("ping -c5 localhost", "r"); + f = popen("ping -4 -c5 localhost", "r"); (void) f; for (i = 0; i < 5; i++) { int key = 0, next_key; struct pair value; - while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) { - bpf_map_lookup_elem(map_fd[0], &next_key, &value); + while (bpf_map_get_next_key(map_fd, &key, &next_key) == 0) { + bpf_map_lookup_elem(map_fd, &next_key, &value); printf("ip %s bytes %lld packets %lld\n", inet_ntoa((struct in_addr){htonl(next_key)}), value.bytes, value.packets); diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c index 9d02e0404719..bbb1cd0666a9 100644 --- a/samples/bpf/sockex3_user.c +++ b/samples/bpf/sockex3_user.c @@ -58,7 +58,7 @@ int main(int argc, char **argv) sizeof(__u32)) == 0); if (argc > 1) - f = popen("ping -c5 localhost", "r"); + f = popen("ping -4 -c5 localhost", "r"); else f = popen("netperf -l 4 localhost", "r"); (void) f; diff --git a/samples/bpf/task_fd_query_kern.c b/samples/bpf/task_fd_query_kern.c index f4b0a9ea674d..fb56fc2a3e5d 100644 --- a/samples/bpf/task_fd_query_kern.c +++ b/samples/bpf/task_fd_query_kern.c @@ -4,7 +4,7 @@ #include <uapi/linux/bpf.h> #include "bpf_helpers.h" -SEC("kprobe/blk_start_request") +SEC("kprobe/blk_mq_start_request") int bpf_prog1(struct pt_regs *ctx) { return 0; diff --git a/samples/bpf/task_fd_query_user.c b/samples/bpf/task_fd_query_user.c index 8381d792f138..aff2b4ae914e 100644 --- a/samples/bpf/task_fd_query_user.c +++ b/samples/bpf/task_fd_query_user.c @@ -311,7 +311,7 @@ int main(int argc, char **argv) } /* test two functions in the corresponding *_kern.c file */ - CHECK_AND_RET(test_debug_fs_kprobe(0, "blk_start_request", + CHECK_AND_RET(test_debug_fs_kprobe(0, "blk_mq_start_request", BPF_FD_TYPE_KPROBE)); CHECK_AND_RET(test_debug_fs_kprobe(1, "blk_account_io_completion", BPF_FD_TYPE_KRETPROBE)); diff --git a/samples/bpf/tcp_basertt_kern.c b/samples/bpf/tcp_basertt_kern.c index 4bf4fc597db9..6ef1625e8b2c 100644 --- a/samples/bpf/tcp_basertt_kern.c +++ b/samples/bpf/tcp_basertt_kern.c @@ -7,7 +7,7 @@ * BPF program to set base_rtt to 80us when host is running TCP-NV and * both hosts are in the same datacenter (as determined by IPv6 prefix). * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_bpf.readme b/samples/bpf/tcp_bpf.readme index 831fb601e3c9..fee746621aec 100644 --- a/samples/bpf/tcp_bpf.readme +++ b/samples/bpf/tcp_bpf.readme @@ -8,14 +8,16 @@ a cgroupv2 and attach a bash shell to the group. bash echo $$ >> /tmp/cgroupv2/foo/cgroup.procs -Anything that runs under this shell belongs to the foo cgroupv2 To load +Anything that runs under this shell belongs to the foo cgroupv2. To load (attach) one of the tcp_*_kern.o programs: - ./load_sock_ops -l /tmp/cgroupv2/foo tcp_basertt_kern.o + bpftool prog load tcp_basertt_kern.o /sys/fs/bpf/tcp_prog + bpftool cgroup attach /tmp/cgroupv2/foo sock_ops pinned /sys/fs/bpf/tcp_prog + bpftool prog tracelog -If the "-l" flag is used, the load_sock_ops program will continue to run -printing the BPF log buffer. The tcp_*_kern.o programs use special print -functions to print logging information (if enabled by the ifdef). +"bpftool prog tracelog" will continue to run printing the BPF log buffer. +The tcp_*_kern.o programs use special print functions to print logging +information (if enabled by the ifdef). If using netperf/netserver to create traffic, you need to run them under the cgroupv2 to which the BPF programs are attached (i.e. under bash shell @@ -23,4 +25,4 @@ attached to the cgroupv2). To remove (unattach) a socket_ops BPF program from a cgroupv2: - ./load_sock_ops -r /tmp/cgroupv2/foo + bpftool cgroup attach /tmp/cgroupv2/foo sock_ops pinned /sys/fs/bpf/tcp_prog diff --git a/samples/bpf/tcp_bufs_kern.c b/samples/bpf/tcp_bufs_kern.c index 0566b7fa38a1..e03e204739fa 100644 --- a/samples/bpf/tcp_bufs_kern.c +++ b/samples/bpf/tcp_bufs_kern.c @@ -9,7 +9,7 @@ * doing appropriate checks that indicate the hosts are far enough * away (i.e. large RTT). * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_clamp_kern.c b/samples/bpf/tcp_clamp_kern.c index f4225c9d2c0c..a0dc2d254aca 100644 --- a/samples/bpf/tcp_clamp_kern.c +++ b/samples/bpf/tcp_clamp_kern.c @@ -9,7 +9,7 @@ * the same datacenter. For his example, we assume they are within the same * datacenter when the first 5.5 bytes of their IPv6 addresses are the same. * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_cong_kern.c b/samples/bpf/tcp_cong_kern.c index ad0f1ba8206a..4fd3ca979a06 100644 --- a/samples/bpf/tcp_cong_kern.c +++ b/samples/bpf/tcp_cong_kern.c @@ -7,7 +7,7 @@ * BPF program to set congestion control to dctcp when both hosts are * in the same datacenter (as deteremined by IPv6 prefix). * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_iw_kern.c b/samples/bpf/tcp_iw_kern.c index 4ca5ecc9f580..9b139ec69560 100644 --- a/samples/bpf/tcp_iw_kern.c +++ b/samples/bpf/tcp_iw_kern.c @@ -9,7 +9,7 @@ * would usually be done after doing appropriate checks that indicate * the hosts are far enough away (i.e. large RTT). * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_rwnd_kern.c b/samples/bpf/tcp_rwnd_kern.c index 09ff65b40b31..cc71ee96e044 100644 --- a/samples/bpf/tcp_rwnd_kern.c +++ b/samples/bpf/tcp_rwnd_kern.c @@ -8,7 +8,7 @@ * and the first 5.5 bytes of the IPv6 addresses are not the same (in this * example that means both hosts are not the same datacenter). * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_synrto_kern.c b/samples/bpf/tcp_synrto_kern.c index 232bb242823e..ca87ed34f896 100644 --- a/samples/bpf/tcp_synrto_kern.c +++ b/samples/bpf/tcp_synrto_kern.c @@ -8,7 +8,7 @@ * and the first 5.5 bytes of the IPv6 addresses are the same (in this example * that means both hosts are in the same datacenter). * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/tcp_tos_reflect_kern.c b/samples/bpf/tcp_tos_reflect_kern.c index d51dab19eca6..de788be6f862 100644 --- a/samples/bpf/tcp_tos_reflect_kern.c +++ b/samples/bpf/tcp_tos_reflect_kern.c @@ -4,7 +4,7 @@ * * BPF program to automatically reflect TOS option from received syn packet * - * Use load_sock_ops to load this BPF program. + * Use "bpftool cgroup attach $cg sock_ops $prog" to load this BPF program. */ #include <uapi/linux/bpf.h> diff --git a/samples/bpf/test_cgrp2_attach2.c b/samples/bpf/test_cgrp2_attach2.c index d7b68ef5ba79..0bb6507256b7 100644 --- a/samples/bpf/test_cgrp2_attach2.c +++ b/samples/bpf/test_cgrp2_attach2.c @@ -77,7 +77,7 @@ static int test_foo_bar(void) /* Create cgroup /foo, get fd, and join it */ foo = create_and_get_cgroup(FOO); - if (!foo) + if (foo < 0) goto err; if (join_cgroup(FOO)) @@ -94,7 +94,7 @@ static int test_foo_bar(void) /* Create cgroup /foo/bar, get fd, and join it */ bar = create_and_get_cgroup(BAR); - if (!bar) + if (bar < 0) goto err; if (join_cgroup(BAR)) @@ -298,19 +298,19 @@ static int test_multiprog(void) goto err; cg1 = create_and_get_cgroup("/cg1"); - if (!cg1) + if (cg1 < 0) goto err; cg2 = create_and_get_cgroup("/cg1/cg2"); - if (!cg2) + if (cg2 < 0) goto err; cg3 = create_and_get_cgroup("/cg1/cg2/cg3"); - if (!cg3) + if (cg3 < 0) goto err; cg4 = create_and_get_cgroup("/cg1/cg2/cg3/cg4"); - if (!cg4) + if (cg4 < 0) goto err; cg5 = create_and_get_cgroup("/cg1/cg2/cg3/cg4/cg5"); - if (!cg5) + if (cg5 < 0) goto err; if (join_cgroup("/cg1/cg2/cg3/cg4/cg5")) diff --git a/samples/bpf/test_current_task_under_cgroup_user.c b/samples/bpf/test_current_task_under_cgroup_user.c index 2259f997a26c..f082d6ac59f0 100644 --- a/samples/bpf/test_current_task_under_cgroup_user.c +++ b/samples/bpf/test_current_task_under_cgroup_user.c @@ -32,7 +32,7 @@ int main(int argc, char **argv) cg2 = create_and_get_cgroup(CGROUP_PATH); - if (!cg2) + if (cg2 < 0) goto err; if (bpf_map_update_elem(map_fd[0], &idx, &cg2, BPF_ANY)) { diff --git a/samples/bpf/tracex2_user.c b/samples/bpf/tracex2_user.c index 1a81e6a5c2ea..c9544a4ce61a 100644 --- a/samples/bpf/tracex2_user.c +++ b/samples/bpf/tracex2_user.c @@ -131,7 +131,7 @@ int main(int ac, char **argv) signal(SIGTERM, int_exit); /* start 'ping' in the background to have some kfree_skb events */ - f = popen("ping -c5 localhost", "r"); + f = popen("ping -4 -c5 localhost", "r"); (void) f; /* start 'dd' in the background to have plenty of 'write' syscalls */ diff --git a/samples/bpf/tracex3_kern.c b/samples/bpf/tracex3_kern.c index 9974c3d7c18b..ea1d4c19c132 100644 --- a/samples/bpf/tracex3_kern.c +++ b/samples/bpf/tracex3_kern.c @@ -20,7 +20,7 @@ struct bpf_map_def SEC("maps") my_map = { /* kprobe is NOT a stable ABI. If kernel internals change this bpf+kprobe * example will no longer be meaningful */ -SEC("kprobe/blk_start_request") +SEC("kprobe/blk_mq_start_request") int bpf_prog1(struct pt_regs *ctx) { long rq = PT_REGS_PARM1(ctx); diff --git a/samples/bpf/xdp1_user.c b/samples/bpf/xdp1_user.c index 0a197f86ac43..6a64e93365e1 100644 --- a/samples/bpf/xdp1_user.c +++ b/samples/bpf/xdp1_user.c @@ -22,11 +22,23 @@ #include "bpf/libbpf.h" static int ifindex; -static __u32 xdp_flags; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static __u32 prog_id; static void int_exit(int sig) { - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on a given interface\n"); + else + printf("program on interface changed, not removing\n"); exit(0); } @@ -63,7 +75,8 @@ static void usage(const char *prog) "usage: %s [OPTS] IFACE\n\n" "OPTS:\n" " -S use skb-mode\n" - " -N enforce native mode\n", + " -N enforce native mode\n" + " -F force loading prog\n", prog); } @@ -73,11 +86,14 @@ int main(int argc, char **argv) struct bpf_prog_load_attr prog_load_attr = { .prog_type = BPF_PROG_TYPE_XDP, }; - const char *optstr = "SN"; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); + const char *optstr = "FSN"; int prog_fd, map_fd, opt; struct bpf_object *obj; struct bpf_map *map; char filename[256]; + int err; while ((opt = getopt(argc, argv, optstr)) != -1) { switch (opt) { @@ -87,6 +103,9 @@ int main(int argc, char **argv) case 'N': xdp_flags |= XDP_FLAGS_DRV_MODE; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(basename(argv[0])); return 1; @@ -103,7 +122,7 @@ int main(int argc, char **argv) return 1; } - ifindex = if_nametoindex(argv[1]); + ifindex = if_nametoindex(argv[optind]); if (!ifindex) { perror("if_nametoindex"); return 1; @@ -135,6 +154,13 @@ int main(int argc, char **argv) return 1; } + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return err; + } + prog_id = info.id; + poll_stats(map_fd, 2); return 0; diff --git a/samples/bpf/xdp_adjust_tail_user.c b/samples/bpf/xdp_adjust_tail_user.c index 3042ce37dae8..07e1b9269e49 100644 --- a/samples/bpf/xdp_adjust_tail_user.c +++ b/samples/bpf/xdp_adjust_tail_user.c @@ -24,12 +24,25 @@ #define STATS_INTERVAL_S 2U static int ifindex = -1; -static __u32 xdp_flags; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static __u32 prog_id; static void int_exit(int sig) { - if (ifindex > -1) - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (ifindex > -1) { + if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on a given iface\n"); + else + printf("program on interface changed, not removing\n"); + } exit(0); } @@ -60,6 +73,7 @@ static void usage(const char *cmd) printf(" -T <stop-after-X-seconds> Default: 0 (forever)\n"); printf(" -S use skb-mode\n"); printf(" -N enforce native mode\n"); + printf(" -F force loading prog\n"); printf(" -h Display this help\n"); } @@ -70,12 +84,15 @@ int main(int argc, char **argv) .prog_type = BPF_PROG_TYPE_XDP, }; unsigned char opt_flags[256] = {}; + const char *optstr = "i:T:SNFh"; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); unsigned int kill_after_s = 0; - const char *optstr = "i:T:SNh"; int i, prog_fd, map_fd, opt; struct bpf_object *obj; struct bpf_map *map; char filename[256]; + int err; for (i = 0; i < strlen(optstr); i++) if (optstr[i] != 'h' && 'a' <= optstr[i] && optstr[i] <= 'z') @@ -96,6 +113,9 @@ int main(int argc, char **argv) case 'N': xdp_flags |= XDP_FLAGS_DRV_MODE; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(argv[0]); return 1; @@ -142,9 +162,15 @@ int main(int argc, char **argv) return 1; } - poll_stats(map_fd, kill_after_s); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return 1; + } + prog_id = info.id; - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + poll_stats(map_fd, kill_after_s); + int_exit(0); return 0; } diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c index 2d23054aaccf..586b294d72d3 100644 --- a/samples/bpf/xdp_redirect_cpu_user.c +++ b/samples/bpf/xdp_redirect_cpu_user.c @@ -24,20 +24,26 @@ static const char *__doc__ = /* How many xdp_progs are defined in _kern.c */ #define MAX_PROG 6 -/* Wanted to get rid of bpf_load.h and fake-"libbpf.h" (and instead - * use bpf/libbpf.h), but cannot as (currently) needed for XDP - * attaching to a device via bpf_set_link_xdp_fd() - */ #include <bpf/bpf.h> -#include "bpf_load.h" +#include "bpf/libbpf.h" #include "bpf_util.h" static int ifindex = -1; static char ifname_buf[IF_NAMESIZE]; static char *ifname; - -static __u32 xdp_flags; +static __u32 prog_id; + +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static int cpu_map_fd; +static int rx_cnt_map_fd; +static int redirect_err_cnt_map_fd; +static int cpumap_enqueue_cnt_map_fd; +static int cpumap_kthread_cnt_map_fd; +static int cpus_available_map_fd; +static int cpus_count_map_fd; +static int cpus_iterator_map_fd; +static int exception_cnt_map_fd; /* Exit return codes */ #define EXIT_OK 0 @@ -51,27 +57,50 @@ static const struct option long_options[] = { {"help", no_argument, NULL, 'h' }, {"dev", required_argument, NULL, 'd' }, {"skb-mode", no_argument, NULL, 'S' }, - {"debug", no_argument, NULL, 'D' }, {"sec", required_argument, NULL, 's' }, - {"prognum", required_argument, NULL, 'p' }, + {"progname", required_argument, NULL, 'p' }, {"qsize", required_argument, NULL, 'q' }, {"cpu", required_argument, NULL, 'c' }, {"stress-mode", no_argument, NULL, 'x' }, {"no-separators", no_argument, NULL, 'z' }, + {"force", no_argument, NULL, 'F' }, {0, 0, NULL, 0 } }; static void int_exit(int sig) { - fprintf(stderr, - "Interrupted: Removing XDP program on ifindex:%d device:%s\n", - ifindex, ifname); - if (ifindex > -1) - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (ifindex > -1) { + if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(EXIT_FAIL); + } + if (prog_id == curr_prog_id) { + fprintf(stderr, + "Interrupted: Removing XDP program on ifindex:%d device:%s\n", + ifindex, ifname); + bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + } else if (!curr_prog_id) { + printf("couldn't find a prog id on a given iface\n"); + } else { + printf("program on interface changed, not removing\n"); + } + } exit(EXIT_OK); } -static void usage(char *argv[]) +static void print_avail_progs(struct bpf_object *obj) +{ + struct bpf_program *pos; + + bpf_object__for_each_program(pos, obj) { + if (bpf_program__is_xdp(pos)) + printf(" %s\n", bpf_program__title(pos, false)); + } +} + +static void usage(char *argv[], struct bpf_object *obj) { int i; @@ -89,6 +118,8 @@ static void usage(char *argv[]) long_options[i].val); printf("\n"); } + printf("\n Programs to be used for --progname:\n"); + print_avail_progs(obj); printf("\n"); } @@ -263,7 +294,7 @@ static __u64 calc_errs_pps(struct datarec *r, static void stats_print(struct stats_record *stats_rec, struct stats_record *stats_prev, - int prog_num) + char *prog_name) { unsigned int nr_cpus = bpf_num_possible_cpus(); double pps = 0, drop = 0, err = 0; @@ -273,7 +304,7 @@ static void stats_print(struct stats_record *stats_rec, int i; /* Header */ - printf("Running XDP/eBPF prog_num:%d\n", prog_num); + printf("Running XDP/eBPF prog_name:%s\n", prog_name); printf("%-15s %-7s %-14s %-11s %-9s\n", "XDP-cpumap", "CPU:to", "pps", "drop-pps", "extra-info"); @@ -424,20 +455,20 @@ static void stats_collect(struct stats_record *rec) { int fd, i; - fd = map_fd[1]; /* map: rx_cnt */ + fd = rx_cnt_map_fd; map_collect_percpu(fd, 0, &rec->rx_cnt); - fd = map_fd[2]; /* map: redirect_err_cnt */ + fd = redirect_err_cnt_map_fd; map_collect_percpu(fd, 1, &rec->redir_err); - fd = map_fd[3]; /* map: cpumap_enqueue_cnt */ + fd = cpumap_enqueue_cnt_map_fd; for (i = 0; i < MAX_CPUS; i++) map_collect_percpu(fd, i, &rec->enq[i]); - fd = map_fd[4]; /* map: cpumap_kthread_cnt */ + fd = cpumap_kthread_cnt_map_fd; map_collect_percpu(fd, 0, &rec->kthread); - fd = map_fd[8]; /* map: exception_cnt */ + fd = exception_cnt_map_fd; map_collect_percpu(fd, 0, &rec->exception); } @@ -462,7 +493,7 @@ static int create_cpu_entry(__u32 cpu, __u32 queue_size, /* Add a CPU entry to cpumap, as this allocate a cpu entry in * the kernel for the cpu. */ - ret = bpf_map_update_elem(map_fd[0], &cpu, &queue_size, 0); + ret = bpf_map_update_elem(cpu_map_fd, &cpu, &queue_size, 0); if (ret) { fprintf(stderr, "Create CPU entry failed (err:%d)\n", ret); exit(EXIT_FAIL_BPF); @@ -471,23 +502,22 @@ static int create_cpu_entry(__u32 cpu, __u32 queue_size, /* Inform bpf_prog's that a new CPU is available to select * from via some control maps. */ - /* map_fd[5] = cpus_available */ - ret = bpf_map_update_elem(map_fd[5], &avail_idx, &cpu, 0); + ret = bpf_map_update_elem(cpus_available_map_fd, &avail_idx, &cpu, 0); if (ret) { fprintf(stderr, "Add to avail CPUs failed\n"); exit(EXIT_FAIL_BPF); } /* When not replacing/updating existing entry, bump the count */ - /* map_fd[6] = cpus_count */ - ret = bpf_map_lookup_elem(map_fd[6], &key, &curr_cpus_count); + ret = bpf_map_lookup_elem(cpus_count_map_fd, &key, &curr_cpus_count); if (ret) { fprintf(stderr, "Failed reading curr cpus_count\n"); exit(EXIT_FAIL_BPF); } if (new) { curr_cpus_count++; - ret = bpf_map_update_elem(map_fd[6], &key, &curr_cpus_count, 0); + ret = bpf_map_update_elem(cpus_count_map_fd, &key, + &curr_cpus_count, 0); if (ret) { fprintf(stderr, "Failed write curr cpus_count\n"); exit(EXIT_FAIL_BPF); @@ -510,8 +540,8 @@ static void mark_cpus_unavailable(void) int ret, i; for (i = 0; i < MAX_CPUS; i++) { - /* map_fd[5] = cpus_available */ - ret = bpf_map_update_elem(map_fd[5], &i, &invalid_cpu, 0); + ret = bpf_map_update_elem(cpus_available_map_fd, &i, + &invalid_cpu, 0); if (ret) { fprintf(stderr, "Failed marking CPU unavailable\n"); exit(EXIT_FAIL_BPF); @@ -531,7 +561,7 @@ static void stress_cpumap(void) create_cpu_entry(1, 16000, 0, false); } -static void stats_poll(int interval, bool use_separators, int prog_num, +static void stats_poll(int interval, bool use_separators, char *prog_name, bool stress_mode) { struct stats_record *record, *prev; @@ -547,7 +577,7 @@ static void stats_poll(int interval, bool use_separators, int prog_num, while (1) { swap(&prev, &record); stats_collect(record); - stats_print(record, prev, prog_num); + stats_print(record, prev, prog_name); sleep(interval); if (stress_mode) stress_cpumap(); @@ -557,20 +587,55 @@ static void stats_poll(int interval, bool use_separators, int prog_num, free_stats_record(prev); } +static int init_map_fds(struct bpf_object *obj) +{ + cpu_map_fd = bpf_object__find_map_fd_by_name(obj, "cpu_map"); + rx_cnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rx_cnt"); + redirect_err_cnt_map_fd = + bpf_object__find_map_fd_by_name(obj, "redirect_err_cnt"); + cpumap_enqueue_cnt_map_fd = + bpf_object__find_map_fd_by_name(obj, "cpumap_enqueue_cnt"); + cpumap_kthread_cnt_map_fd = + bpf_object__find_map_fd_by_name(obj, "cpumap_kthread_cnt"); + cpus_available_map_fd = + bpf_object__find_map_fd_by_name(obj, "cpus_available"); + cpus_count_map_fd = bpf_object__find_map_fd_by_name(obj, "cpus_count"); + cpus_iterator_map_fd = + bpf_object__find_map_fd_by_name(obj, "cpus_iterator"); + exception_cnt_map_fd = + bpf_object__find_map_fd_by_name(obj, "exception_cnt"); + + if (cpu_map_fd < 0 || rx_cnt_map_fd < 0 || + redirect_err_cnt_map_fd < 0 || cpumap_enqueue_cnt_map_fd < 0 || + cpumap_kthread_cnt_map_fd < 0 || cpus_available_map_fd < 0 || + cpus_count_map_fd < 0 || cpus_iterator_map_fd < 0 || + exception_cnt_map_fd < 0) + return -ENOENT; + + return 0; +} + int main(int argc, char **argv) { struct rlimit r = {10 * 1024 * 1024, RLIM_INFINITY}; + char *prog_name = "xdp_cpu_map5_lb_hash_ip_pairs"; + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_UNSPEC, + }; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); bool use_separators = true; bool stress_mode = false; + struct bpf_program *prog; + struct bpf_object *obj; char filename[256]; - bool debug = false; int added_cpus = 0; int longindex = 0; int interval = 2; - int prog_num = 5; int add_cpu = -1; + int opt, err; + int prog_fd; __u32 qsize; - int opt; /* Notice: choosing he queue size is very important with the * ixgbe driver, because it's driver page recycling trick is @@ -581,26 +646,29 @@ int main(int argc, char **argv) qsize = 128+64; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + prog_load_attr.file = filename; if (setrlimit(RLIMIT_MEMLOCK, &r)) { perror("setrlimit(RLIMIT_MEMLOCK)"); return 1; } - if (load_bpf_file(filename)) { - fprintf(stderr, "ERR in load_bpf_file(): %s", bpf_log_buf); + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) return EXIT_FAIL; - } - if (!prog_fd[0]) { - fprintf(stderr, "ERR: load_bpf_file: %s\n", strerror(errno)); + if (prog_fd < 0) { + fprintf(stderr, "ERR: bpf_prog_load_xattr: %s\n", + strerror(errno)); + return EXIT_FAIL; + } + if (init_map_fds(obj) < 0) { + fprintf(stderr, "bpf_object__find_map_fd_by_name failed\n"); return EXIT_FAIL; } - mark_cpus_unavailable(); /* Parse commands line args */ - while ((opt = getopt_long(argc, argv, "hSd:", + while ((opt = getopt_long(argc, argv, "hSd:s:p:q:c:xzF", long_options, &longindex)) != -1) { switch (opt) { case 'd': @@ -624,9 +692,6 @@ int main(int argc, char **argv) case 'S': xdp_flags |= XDP_FLAGS_SKB_MODE; break; - case 'D': - debug = true; - break; case 'x': stress_mode = true; break; @@ -635,13 +700,7 @@ int main(int argc, char **argv) break; case 'p': /* Selecting eBPF prog to load */ - prog_num = atoi(optarg); - if (prog_num < 0 || prog_num >= MAX_PROG) { - fprintf(stderr, - "--prognum too large err(%d):%s\n", - errno, strerror(errno)); - goto error; - } + prog_name = optarg; break; case 'c': /* Add multiple CPUs */ @@ -658,24 +717,27 @@ int main(int argc, char **argv) case 'q': qsize = atoi(optarg); break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; case 'h': error: default: - usage(argv); + usage(argv, obj); return EXIT_FAIL_OPTION; } } /* Required option */ if (ifindex == -1) { fprintf(stderr, "ERR: required option --dev missing\n"); - usage(argv); + usage(argv, obj); return EXIT_FAIL_OPTION; } /* Required option */ if (add_cpu == -1) { fprintf(stderr, "ERR: required option --cpu missing\n"); fprintf(stderr, " Specify multiple --cpu option to add more\n"); - usage(argv); + usage(argv, obj); return EXIT_FAIL_OPTION; } @@ -683,16 +745,30 @@ int main(int argc, char **argv) signal(SIGINT, int_exit); signal(SIGTERM, int_exit); - if (bpf_set_link_xdp_fd(ifindex, prog_fd[prog_num], xdp_flags) < 0) { + prog = bpf_object__find_program_by_title(obj, prog_name); + if (!prog) { + fprintf(stderr, "bpf_object__find_program_by_title failed\n"); + return EXIT_FAIL; + } + + prog_fd = bpf_program__fd(prog); + if (prog_fd < 0) { + fprintf(stderr, "bpf_program__fd failed\n"); + return EXIT_FAIL; + } + + if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) { fprintf(stderr, "link set xdp fd failed\n"); return EXIT_FAIL_XDP; } - if (debug) { - printf("Debug-mode reading trace pipe (fix #define DEBUG)\n"); - read_trace_pipe(); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return err; } + prog_id = info.id; - stats_poll(interval, use_separators, prog_num, stress_mode); + stats_poll(interval, use_separators, prog_name, stress_mode); return EXIT_OK; } diff --git a/samples/bpf/xdp_redirect_map_user.c b/samples/bpf/xdp_redirect_map_user.c index 4445e76854b5..1dbe7fd3a1a8 100644 --- a/samples/bpf/xdp_redirect_map_user.c +++ b/samples/bpf/xdp_redirect_map_user.c @@ -22,21 +22,48 @@ #include <libgen.h> #include <sys/resource.h> -#include "bpf_load.h" #include "bpf_util.h" #include <bpf/bpf.h> +#include "bpf/libbpf.h" static int ifindex_in; static int ifindex_out; static bool ifindex_out_xdp_dummy_attached = true; +static __u32 prog_id; +static __u32 dummy_prog_id; -static __u32 xdp_flags; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static int rxcnt_map_fd; static void int_exit(int sig) { - bpf_set_link_xdp_fd(ifindex_in, -1, xdp_flags); - if (ifindex_out_xdp_dummy_attached) - bpf_set_link_xdp_fd(ifindex_out, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (bpf_get_link_xdp_id(ifindex_in, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex_in, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on iface IN\n"); + else + printf("program on iface IN changed, not removing\n"); + + if (ifindex_out_xdp_dummy_attached) { + curr_prog_id = 0; + if (bpf_get_link_xdp_id(ifindex_out, &curr_prog_id, + xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (dummy_prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex_out, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on iface OUT\n"); + else + printf("program on iface OUT changed, not removing\n"); + } exit(0); } @@ -53,7 +80,7 @@ static void poll_stats(int interval, int ifindex) int i; sleep(interval); - assert(bpf_map_lookup_elem(map_fd[1], &key, values) == 0); + assert(bpf_map_lookup_elem(rxcnt_map_fd, &key, values) == 0); for (i = 0; i < nr_cpus; i++) sum += (values[i] - prev[i]); if (sum) @@ -69,16 +96,26 @@ static void usage(const char *prog) "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n" "OPTS:\n" " -S use skb-mode\n" - " -N enforce native mode\n", + " -N enforce native mode\n" + " -F force loading prog\n", prog); } int main(int argc, char **argv) { struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; - const char *optstr = "SN"; - char filename[256]; + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_XDP, + }; + struct bpf_program *prog, *dummy_prog; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); + int prog_fd, dummy_prog_fd; + const char *optstr = "FSN"; + struct bpf_object *obj; int ret, opt, key = 0; + char filename[256]; + int tx_port_map_fd; while ((opt = getopt(argc, argv, optstr)) != -1) { switch (opt) { @@ -88,6 +125,9 @@ int main(int argc, char **argv) case 'N': xdp_flags |= XDP_FLAGS_DRV_MODE; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(basename(argv[0])); return 1; @@ -109,37 +149,65 @@ int main(int argc, char **argv) printf("input: %d output: %d\n", ifindex_in, ifindex_out); snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + prog_load_attr.file = filename; + + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) + return 1; - if (load_bpf_file(filename)) { - printf("%s", bpf_log_buf); + prog = bpf_program__next(NULL, obj); + dummy_prog = bpf_program__next(prog, obj); + if (!prog || !dummy_prog) { + printf("finding a prog in obj file failed\n"); + return 1; + } + /* bpf_prog_load_xattr gives us the pointer to first prog's fd, + * so we're missing only the fd for dummy prog + */ + dummy_prog_fd = bpf_program__fd(dummy_prog); + if (prog_fd < 0 || dummy_prog_fd < 0) { + printf("bpf_prog_load_xattr: %s\n", strerror(errno)); return 1; } - if (!prog_fd[0]) { - printf("load_bpf_file: %s\n", strerror(errno)); + tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port"); + rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); + if (tx_port_map_fd < 0 || rxcnt_map_fd < 0) { + printf("bpf_object__find_map_fd_by_name failed\n"); return 1; } - if (bpf_set_link_xdp_fd(ifindex_in, prog_fd[0], xdp_flags) < 0) { + if (bpf_set_link_xdp_fd(ifindex_in, prog_fd, xdp_flags) < 0) { printf("ERROR: link set xdp fd failed on %d\n", ifindex_in); return 1; } + ret = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (ret) { + printf("can't get prog info - %s\n", strerror(errno)); + return ret; + } + prog_id = info.id; + /* Loading dummy XDP prog on out-device */ - if (bpf_set_link_xdp_fd(ifindex_out, prog_fd[1], + if (bpf_set_link_xdp_fd(ifindex_out, dummy_prog_fd, (xdp_flags | XDP_FLAGS_UPDATE_IF_NOEXIST)) < 0) { printf("WARN: link set xdp fd failed on %d\n", ifindex_out); ifindex_out_xdp_dummy_attached = false; } + memset(&info, 0, sizeof(info)); + ret = bpf_obj_get_info_by_fd(dummy_prog_fd, &info, &info_len); + if (ret) { + printf("can't get prog info - %s\n", strerror(errno)); + return ret; + } + dummy_prog_id = info.id; + signal(SIGINT, int_exit); signal(SIGTERM, int_exit); - printf("map[0] (vports) = %i, map[1] (map) = %i, map[2] (count) = %i\n", - map_fd[0], map_fd[1], map_fd[2]); - /* populate virtual to physical port map */ - ret = bpf_map_update_elem(map_fd[0], &key, &ifindex_out, 0); + ret = bpf_map_update_elem(tx_port_map_fd, &key, &ifindex_out, 0); if (ret) { perror("bpf_update_elem"); goto out; diff --git a/samples/bpf/xdp_redirect_user.c b/samples/bpf/xdp_redirect_user.c index 81a69e36cb78..e9054c0269ff 100644 --- a/samples/bpf/xdp_redirect_user.c +++ b/samples/bpf/xdp_redirect_user.c @@ -22,21 +22,48 @@ #include <libgen.h> #include <sys/resource.h> -#include "bpf_load.h" #include "bpf_util.h" #include <bpf/bpf.h> +#include "bpf/libbpf.h" static int ifindex_in; static int ifindex_out; static bool ifindex_out_xdp_dummy_attached = true; +static __u32 prog_id; +static __u32 dummy_prog_id; -static __u32 xdp_flags; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static int rxcnt_map_fd; static void int_exit(int sig) { - bpf_set_link_xdp_fd(ifindex_in, -1, xdp_flags); - if (ifindex_out_xdp_dummy_attached) - bpf_set_link_xdp_fd(ifindex_out, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (bpf_get_link_xdp_id(ifindex_in, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex_in, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on iface IN\n"); + else + printf("program on iface IN changed, not removing\n"); + + if (ifindex_out_xdp_dummy_attached) { + curr_prog_id = 0; + if (bpf_get_link_xdp_id(ifindex_out, &curr_prog_id, + xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (dummy_prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex_out, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on iface OUT\n"); + else + printf("program on iface OUT changed, not removing\n"); + } exit(0); } @@ -53,7 +80,7 @@ static void poll_stats(int interval, int ifindex) int i; sleep(interval); - assert(bpf_map_lookup_elem(map_fd[1], &key, values) == 0); + assert(bpf_map_lookup_elem(rxcnt_map_fd, &key, values) == 0); for (i = 0; i < nr_cpus; i++) sum += (values[i] - prev[i]); if (sum) @@ -69,7 +96,8 @@ static void usage(const char *prog) "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n" "OPTS:\n" " -S use skb-mode\n" - " -N enforce native mode\n", + " -N enforce native mode\n" + " -F force loading prog\n", prog); } @@ -77,9 +105,18 @@ static void usage(const char *prog) int main(int argc, char **argv) { struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; - const char *optstr = "SN"; + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_XDP, + }; + struct bpf_program *prog, *dummy_prog; + int prog_fd, tx_port_map_fd, opt; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); + const char *optstr = "FSN"; + struct bpf_object *obj; char filename[256]; - int ret, opt, key = 0; + int dummy_prog_fd; + int ret, key = 0; while ((opt = getopt(argc, argv, optstr)) != -1) { switch (opt) { @@ -89,6 +126,9 @@ int main(int argc, char **argv) case 'N': xdp_flags |= XDP_FLAGS_DRV_MODE; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(basename(argv[0])); return 1; @@ -110,34 +150,65 @@ int main(int argc, char **argv) printf("input: %d output: %d\n", ifindex_in, ifindex_out); snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + prog_load_attr.file = filename; + + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) + return 1; - if (load_bpf_file(filename)) { - printf("%s", bpf_log_buf); + prog = bpf_program__next(NULL, obj); + dummy_prog = bpf_program__next(prog, obj); + if (!prog || !dummy_prog) { + printf("finding a prog in obj file failed\n"); + return 1; + } + /* bpf_prog_load_xattr gives us the pointer to first prog's fd, + * so we're missing only the fd for dummy prog + */ + dummy_prog_fd = bpf_program__fd(dummy_prog); + if (prog_fd < 0 || dummy_prog_fd < 0) { + printf("bpf_prog_load_xattr: %s\n", strerror(errno)); return 1; } - if (!prog_fd[0]) { - printf("load_bpf_file: %s\n", strerror(errno)); + tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port"); + rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); + if (tx_port_map_fd < 0 || rxcnt_map_fd < 0) { + printf("bpf_object__find_map_fd_by_name failed\n"); return 1; } - if (bpf_set_link_xdp_fd(ifindex_in, prog_fd[0], xdp_flags) < 0) { + if (bpf_set_link_xdp_fd(ifindex_in, prog_fd, xdp_flags) < 0) { printf("ERROR: link set xdp fd failed on %d\n", ifindex_in); return 1; } + ret = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (ret) { + printf("can't get prog info - %s\n", strerror(errno)); + return ret; + } + prog_id = info.id; + /* Loading dummy XDP prog on out-device */ - if (bpf_set_link_xdp_fd(ifindex_out, prog_fd[1], + if (bpf_set_link_xdp_fd(ifindex_out, dummy_prog_fd, (xdp_flags | XDP_FLAGS_UPDATE_IF_NOEXIST)) < 0) { printf("WARN: link set xdp fd failed on %d\n", ifindex_out); ifindex_out_xdp_dummy_attached = false; } + memset(&info, 0, sizeof(info)); + ret = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (ret) { + printf("can't get prog info - %s\n", strerror(errno)); + return ret; + } + dummy_prog_id = info.id; + signal(SIGINT, int_exit); signal(SIGTERM, int_exit); /* bpf redirect port */ - ret = bpf_map_update_elem(map_fd[0], &key, &ifindex_out, 0); + ret = bpf_map_update_elem(tx_port_map_fd, &key, &ifindex_out, 0); if (ret) { perror("bpf_update_elem"); goto out; diff --git a/samples/bpf/xdp_router_ipv4_user.c b/samples/bpf/xdp_router_ipv4_user.c index b2b4dfa776c8..79fe7bc26ab4 100644 --- a/samples/bpf/xdp_router_ipv4_user.c +++ b/samples/bpf/xdp_router_ipv4_user.c @@ -15,7 +15,6 @@ #include <string.h> #include <sys/socket.h> #include <unistd.h> -#include "bpf_load.h" #include <bpf/bpf.h> #include <arpa/inet.h> #include <fcntl.h> @@ -25,32 +24,52 @@ #include <sys/ioctl.h> #include <sys/syscall.h> #include "bpf_util.h" +#include "bpf/libbpf.h" +#include <sys/resource.h> +#include <libgen.h> -int sock, sock_arp, flags = 0; +int sock, sock_arp, flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static int total_ifindex; -int *ifindex_list; +static int *ifindex_list; +static __u32 *prog_id_list; char buf[8192]; +static int lpm_map_fd; +static int rxcnt_map_fd; +static int arp_table_map_fd; +static int exact_match_map_fd; +static int tx_port_map_fd; static int get_route_table(int rtm_family); static void int_exit(int sig) { + __u32 prog_id = 0; int i = 0; - for (i = 0; i < total_ifindex; i++) - bpf_set_link_xdp_fd(ifindex_list[i], -1, flags); + for (i = 0; i < total_ifindex; i++) { + if (bpf_get_link_xdp_id(ifindex_list[i], &prog_id, flags)) { + printf("bpf_get_link_xdp_id on iface %d failed\n", + ifindex_list[i]); + exit(1); + } + if (prog_id_list[i] == prog_id) + bpf_set_link_xdp_fd(ifindex_list[i], -1, flags); + else if (!prog_id) + printf("couldn't find a prog id on iface %d\n", + ifindex_list[i]); + else + printf("program on iface %d changed, not removing\n", + ifindex_list[i]); + prog_id = 0; + } exit(0); } static void close_and_exit(int sig) { - int i = 0; - close(sock); close(sock_arp); - for (i = 0; i < total_ifindex; i++) - bpf_set_link_xdp_fd(ifindex_list[i], -1, flags); - exit(0); + int_exit(0); } /* Get the mac address of the interface given interface name */ @@ -179,14 +198,10 @@ static void read_route(struct nlmsghdr *nh, int nll) route.iface_name = alloca(sizeof(char *) * IFNAMSIZ); route.iface_name = if_indextoname(route.iface, route.iface_name); route.mac = getmac(route.iface_name); - if (route.mac == -1) { - int i = 0; - - for (i = 0; i < total_ifindex; i++) - bpf_set_link_xdp_fd(ifindex_list[i], -1, flags); - exit(0); - } - assert(bpf_map_update_elem(map_fd[4], &route.iface, &route.iface, 0) == 0); + if (route.mac == -1) + int_exit(0); + assert(bpf_map_update_elem(tx_port_map_fd, + &route.iface, &route.iface, 0) == 0); if (rtm_family == AF_INET) { struct trie_value { __u8 prefix[4]; @@ -207,11 +222,16 @@ static void read_route(struct nlmsghdr *nh, int nll) direct_entry.arp.dst = 0; if (route.dst_len == 32) { if (nh->nlmsg_type == RTM_DELROUTE) { - assert(bpf_map_delete_elem(map_fd[3], &route.dst) == 0); + assert(bpf_map_delete_elem(exact_match_map_fd, + &route.dst) == 0); } else { - if (bpf_map_lookup_elem(map_fd[2], &route.dst, &direct_entry.arp.mac) == 0) + if (bpf_map_lookup_elem(arp_table_map_fd, + &route.dst, + &direct_entry.arp.mac) == 0) direct_entry.arp.dst = route.dst; - assert(bpf_map_update_elem(map_fd[3], &route.dst, &direct_entry, 0) == 0); + assert(bpf_map_update_elem(exact_match_map_fd, + &route.dst, + &direct_entry, 0) == 0); } } for (i = 0; i < 4; i++) @@ -225,7 +245,7 @@ static void read_route(struct nlmsghdr *nh, int nll) route.gw, route.dst_len, route.metric, route.iface_name); - if (bpf_map_lookup_elem(map_fd[0], prefix_key, + if (bpf_map_lookup_elem(lpm_map_fd, prefix_key, prefix_value) < 0) { for (i = 0; i < 4; i++) prefix_value->prefix[i] = prefix_key->data[i]; @@ -234,7 +254,7 @@ static void read_route(struct nlmsghdr *nh, int nll) prefix_value->gw = route.gw; prefix_value->metric = route.metric; - assert(bpf_map_update_elem(map_fd[0], + assert(bpf_map_update_elem(lpm_map_fd, prefix_key, prefix_value, 0 ) == 0); @@ -247,7 +267,7 @@ static void read_route(struct nlmsghdr *nh, int nll) prefix_key->data[2], prefix_key->data[3], prefix_key->prefixlen); - assert(bpf_map_delete_elem(map_fd[0], + assert(bpf_map_delete_elem(lpm_map_fd, prefix_key ) == 0); /* Rereading the route table to check if @@ -275,8 +295,7 @@ static void read_route(struct nlmsghdr *nh, int nll) prefix_value->ifindex = route.iface; prefix_value->gw = route.gw; prefix_value->metric = route.metric; - assert(bpf_map_update_elem( - map_fd[0], + assert(bpf_map_update_elem(lpm_map_fd, prefix_key, prefix_value, 0) == 0); @@ -401,7 +420,8 @@ static void read_arp(struct nlmsghdr *nh, int nll) arp_entry.mac = atol(mac); printf("%x\t\t%llx\n", arp_entry.dst, arp_entry.mac); if (ndm_family == AF_INET) { - if (bpf_map_lookup_elem(map_fd[3], &arp_entry.dst, + if (bpf_map_lookup_elem(exact_match_map_fd, + &arp_entry.dst, &direct_entry) == 0) { if (nh->nlmsg_type == RTM_DELNEIGH) { direct_entry.arp.dst = 0; @@ -410,16 +430,17 @@ static void read_arp(struct nlmsghdr *nh, int nll) direct_entry.arp.dst = arp_entry.dst; direct_entry.arp.mac = arp_entry.mac; } - assert(bpf_map_update_elem(map_fd[3], + assert(bpf_map_update_elem(exact_match_map_fd, &arp_entry.dst, &direct_entry, 0 ) == 0); memset(&direct_entry, 0, sizeof(direct_entry)); } if (nh->nlmsg_type == RTM_DELNEIGH) { - assert(bpf_map_delete_elem(map_fd[2], &arp_entry.dst) == 0); + assert(bpf_map_delete_elem(arp_table_map_fd, + &arp_entry.dst) == 0); } else if (nh->nlmsg_type == RTM_NEWNEIGH) { - assert(bpf_map_update_elem(map_fd[2], + assert(bpf_map_update_elem(arp_table_map_fd, &arp_entry.dst, &arp_entry.mac, 0 ) == 0); @@ -553,7 +574,8 @@ static int monitor_route(void) for (key = 0; key < nr_keys; key++) { __u64 sum = 0; - assert(bpf_map_lookup_elem(map_fd[1], &key, values) == 0); + assert(bpf_map_lookup_elem(rxcnt_map_fd, + &key, values) == 0); for (i = 0; i < nr_cpus; i++) sum += (values[i] - prev[key][i]); if (sum) @@ -594,36 +616,87 @@ cleanup: return ret; } +static void usage(const char *prog) +{ + fprintf(stderr, + "%s: %s [OPTS] interface name list\n\n" + "OPTS:\n" + " -S use skb-mode\n" + " -F force loading prog\n", + __func__, prog); +} + int main(int ac, char **argv) { + struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_XDP, + }; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); + const char *optstr = "SF"; + struct bpf_object *obj; char filename[256]; char **ifname_list; - int i = 1; + int prog_fd, opt; + int err, i = 1; snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - if (ac < 2) { - printf("usage: %s [-S] Interface name list\n", argv[0]); - return 1; + prog_load_attr.file = filename; + + total_ifindex = ac - 1; + ifname_list = (argv + 1); + + while ((opt = getopt(ac, argv, optstr)) != -1) { + switch (opt) { + case 'S': + flags |= XDP_FLAGS_SKB_MODE; + total_ifindex--; + ifname_list++; + break; + case 'F': + flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + total_ifindex--; + ifname_list++; + break; + default: + usage(basename(argv[0])); + return 1; + } } - if (!strcmp(argv[1], "-S")) { - flags = XDP_FLAGS_SKB_MODE; - total_ifindex = ac - 2; - ifname_list = (argv + 2); - } else { - flags = 0; - total_ifindex = ac - 1; - ifname_list = (argv + 1); + + if (optind == ac) { + usage(basename(argv[0])); + return 1; } - if (load_bpf_file(filename)) { - printf("%s", bpf_log_buf); + + if (setrlimit(RLIMIT_MEMLOCK, &r)) { + perror("setrlimit(RLIMIT_MEMLOCK)"); return 1; } + + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) + return 1; + printf("\n**************loading bpf file*********************\n\n\n"); - if (!prog_fd[0]) { - printf("load_bpf_file: %s\n", strerror(errno)); + if (!prog_fd) { + printf("bpf_prog_load_xattr: %s\n", strerror(errno)); return 1; } - ifindex_list = (int *)malloc(total_ifindex * sizeof(int *)); + + lpm_map_fd = bpf_object__find_map_fd_by_name(obj, "lpm_map"); + rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); + arp_table_map_fd = bpf_object__find_map_fd_by_name(obj, "arp_table"); + exact_match_map_fd = bpf_object__find_map_fd_by_name(obj, + "exact_match"); + tx_port_map_fd = bpf_object__find_map_fd_by_name(obj, "tx_port"); + if (lpm_map_fd < 0 || rxcnt_map_fd < 0 || arp_table_map_fd < 0 || + exact_match_map_fd < 0 || tx_port_map_fd < 0) { + printf("bpf_object__find_map_fd_by_name failed\n"); + return 1; + } + + ifindex_list = (int *)calloc(total_ifindex, sizeof(int *)); for (i = 0; i < total_ifindex; i++) { ifindex_list[i] = if_nametoindex(ifname_list[i]); if (!ifindex_list[i]) { @@ -632,8 +705,9 @@ int main(int ac, char **argv) return 1; } } + prog_id_list = (__u32 *)calloc(total_ifindex, sizeof(__u32 *)); for (i = 0; i < total_ifindex; i++) { - if (bpf_set_link_xdp_fd(ifindex_list[i], prog_fd[0], flags) < 0) { + if (bpf_set_link_xdp_fd(ifindex_list[i], prog_fd, flags) < 0) { printf("link set xdp fd failed\n"); int recovery_index = i; @@ -642,6 +716,13 @@ int main(int ac, char **argv) return 1; } + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return err; + } + prog_id_list[i] = info.id; + memset(&info, 0, sizeof(info)); printf("Attached to %d\n", ifindex_list[i]); } signal(SIGINT, int_exit); diff --git a/samples/bpf/xdp_rxq_info_user.c b/samples/bpf/xdp_rxq_info_user.c index ef26f882f92f..1210f3b170f0 100644 --- a/samples/bpf/xdp_rxq_info_user.c +++ b/samples/bpf/xdp_rxq_info_user.c @@ -29,8 +29,9 @@ static const char *__doc__ = " XDP RX-queue info extract example\n\n" static int ifindex = -1; static char ifname_buf[IF_NAMESIZE]; static char *ifname; +static __u32 prog_id; -static __u32 xdp_flags; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static struct bpf_map *stats_global_map; static struct bpf_map *rx_queue_index_map; @@ -52,16 +53,30 @@ static const struct option long_options[] = { {"action", required_argument, NULL, 'a' }, {"readmem", no_argument, NULL, 'r' }, {"swapmac", no_argument, NULL, 'm' }, + {"force", no_argument, NULL, 'F' }, {0, 0, NULL, 0 } }; static void int_exit(int sig) { - fprintf(stderr, - "Interrupted: Removing XDP program on ifindex:%d device:%s\n", - ifindex, ifname); - if (ifindex > -1) - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (ifindex > -1) { + if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(EXIT_FAIL); + } + if (prog_id == curr_prog_id) { + fprintf(stderr, + "Interrupted: Removing XDP program on ifindex:%d device:%s\n", + ifindex, ifname); + bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + } else if (!curr_prog_id) { + printf("couldn't find a prog id on a given iface\n"); + } else { + printf("program on interface changed, not removing\n"); + } + } exit(EXIT_OK); } @@ -446,6 +461,8 @@ int main(int argc, char **argv) struct bpf_prog_load_attr prog_load_attr = { .prog_type = BPF_PROG_TYPE_XDP, }; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); int prog_fd, map_fd, opt, err; bool use_separators = true; struct config cfg = { 0 }; @@ -487,7 +504,7 @@ int main(int argc, char **argv) } /* Parse commands line args */ - while ((opt = getopt_long(argc, argv, "hSd:", + while ((opt = getopt_long(argc, argv, "FhSrmzd:s:a:", long_options, &longindex)) != -1) { switch (opt) { case 'd': @@ -524,6 +541,9 @@ int main(int argc, char **argv) case 'm': cfg_options |= SWAP_MAC; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; case 'h': error: default: @@ -576,6 +596,13 @@ int main(int argc, char **argv) return EXIT_FAIL_XDP; } + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return err; + } + prog_id = info.id; + stats_poll(interval, action, cfg_options); return EXIT_OK; } diff --git a/samples/bpf/xdp_sample_pkts_user.c b/samples/bpf/xdp_sample_pkts_user.c index 8dd87c1eb560..dc66345a929a 100644 --- a/samples/bpf/xdp_sample_pkts_user.c +++ b/samples/bpf/xdp_sample_pkts_user.c @@ -12,6 +12,9 @@ #include <signal.h> #include <libbpf.h> #include <bpf/bpf.h> +#include <sys/resource.h> +#include <libgen.h> +#include <linux/if_link.h> #include "perf-sys.h" #include "trace_helpers.h" @@ -20,25 +23,50 @@ static int pmu_fds[MAX_CPUS], if_idx; static struct perf_event_mmap_page *headers[MAX_CPUS]; static char *if_name; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static __u32 prog_id; static int do_attach(int idx, int fd, const char *name) { + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); int err; - err = bpf_set_link_xdp_fd(idx, fd, 0); - if (err < 0) + err = bpf_set_link_xdp_fd(idx, fd, xdp_flags); + if (err < 0) { printf("ERROR: failed to attach program to %s\n", name); + return err; + } + + err = bpf_obj_get_info_by_fd(fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return err; + } + prog_id = info.id; return err; } static int do_detach(int idx, const char *name) { - int err; + __u32 curr_prog_id = 0; + int err = 0; - err = bpf_set_link_xdp_fd(idx, -1, 0); - if (err < 0) - printf("ERROR: failed to detach program from %s\n", name); + err = bpf_get_link_xdp_id(idx, &curr_prog_id, 0); + if (err) { + printf("bpf_get_link_xdp_id failed\n"); + return err; + } + if (prog_id == curr_prog_id) { + err = bpf_set_link_xdp_fd(idx, -1, 0); + if (err < 0) + printf("ERROR: failed to detach prog from %s\n", name); + } else if (!curr_prog_id) { + printf("couldn't find a prog id on a %s\n", name); + } else { + printf("program on interface changed, not removing\n"); + } return err; } @@ -97,20 +125,47 @@ static void sig_handler(int signo) exit(0); } +static void usage(const char *prog) +{ + fprintf(stderr, + "%s: %s [OPTS] <ifname|ifindex>\n\n" + "OPTS:\n" + " -F force loading prog\n", + __func__, prog); +} + int main(int argc, char **argv) { + struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; struct bpf_prog_load_attr prog_load_attr = { .prog_type = BPF_PROG_TYPE_XDP, }; + const char *optstr = "F"; + int prog_fd, map_fd, opt; struct bpf_object *obj; struct bpf_map *map; - int prog_fd, map_fd; char filename[256]; int ret, err, i; int numcpus; - if (argc < 2) { - printf("Usage: %s <ifname>\n", argv[0]); + while ((opt = getopt(argc, argv, optstr)) != -1) { + switch (opt) { + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; + default: + usage(basename(argv[0])); + return 1; + } + } + + if (optind == argc) { + usage(basename(argv[0])); + return 1; + } + + if (setrlimit(RLIMIT_MEMLOCK, &r)) { + perror("setrlimit(RLIMIT_MEMLOCK)"); return 1; } @@ -136,16 +191,16 @@ int main(int argc, char **argv) } map_fd = bpf_map__fd(map); - if_idx = if_nametoindex(argv[1]); + if_idx = if_nametoindex(argv[optind]); if (!if_idx) - if_idx = strtoul(argv[1], NULL, 0); + if_idx = strtoul(argv[optind], NULL, 0); if (!if_idx) { fprintf(stderr, "Invalid ifname\n"); return 1; } - if_name = argv[1]; - err = do_attach(if_idx, prog_fd, argv[1]); + if_name = argv[optind]; + err = do_attach(if_idx, prog_fd, if_name); if (err) return err; diff --git a/samples/bpf/xdp_tx_iptunnel_user.c b/samples/bpf/xdp_tx_iptunnel_user.c index a4ccc33adac0..4a1511eb7812 100644 --- a/samples/bpf/xdp_tx_iptunnel_user.c +++ b/samples/bpf/xdp_tx_iptunnel_user.c @@ -17,7 +17,7 @@ #include <netinet/ether.h> #include <unistd.h> #include <time.h> -#include "bpf_load.h" +#include "bpf/libbpf.h" #include <bpf/bpf.h> #include "bpf_util.h" #include "xdp_tx_iptunnel_common.h" @@ -25,12 +25,26 @@ #define STATS_INTERVAL_S 2U static int ifindex = -1; -static __u32 xdp_flags = 0; +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static int rxcnt_map_fd; +static __u32 prog_id; static void int_exit(int sig) { - if (ifindex > -1) - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + __u32 curr_prog_id = 0; + + if (ifindex > -1) { + if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on a given iface\n"); + else + printf("program on interface changed, not removing\n"); + } exit(0); } @@ -53,7 +67,8 @@ static void poll_stats(unsigned int kill_after_s) for (proto = 0; proto < nr_protos; proto++) { __u64 sum = 0; - assert(bpf_map_lookup_elem(map_fd[0], &proto, values) == 0); + assert(bpf_map_lookup_elem(rxcnt_map_fd, &proto, + values) == 0); for (i = 0; i < nr_cpus; i++) sum += (values[i] - prev[proto][i]); @@ -81,6 +96,7 @@ static void usage(const char *cmd) printf(" -P <IP-Protocol> Default is TCP\n"); printf(" -S use skb-mode\n"); printf(" -N enforce native mode\n"); + printf(" -F Force loading the XDP prog\n"); printf(" -h Display this help\n"); } @@ -138,16 +154,22 @@ static int parse_ports(const char *port_str, int *min_port, int *max_port) int main(int argc, char **argv) { + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_XDP, + }; + struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; + int min_port = 0, max_port = 0, vip2tnl_map_fd; + const char *optstr = "i:a:p:s:d:m:T:P:FSNh"; unsigned char opt_flags[256] = {}; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); unsigned int kill_after_s = 0; - const char *optstr = "i:a:p:s:d:m:T:P:SNh"; - int min_port = 0, max_port = 0; struct iptnl_info tnl = {}; - struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; + struct bpf_object *obj; struct vip vip = {}; char filename[256]; - int opt; - int i; + int opt, prog_fd; + int i, err; tnl.family = AF_UNSPEC; vip.protocol = IPPROTO_TCP; @@ -211,6 +233,9 @@ int main(int argc, char **argv) case 'N': xdp_flags |= XDP_FLAGS_DRV_MODE; break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(argv[0]); return 1; @@ -232,33 +257,47 @@ int main(int argc, char **argv) } snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + prog_load_attr.file = filename; - if (load_bpf_file(filename)) { - printf("%s", bpf_log_buf); + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) return 1; - } - if (!prog_fd[0]) { + if (!prog_fd) { printf("load_bpf_file: %s\n", strerror(errno)); return 1; } + rxcnt_map_fd = bpf_object__find_map_fd_by_name(obj, "rxcnt"); + vip2tnl_map_fd = bpf_object__find_map_fd_by_name(obj, "vip2tnl"); + if (vip2tnl_map_fd < 0 || rxcnt_map_fd < 0) { + printf("bpf_object__find_map_fd_by_name failed\n"); + return 1; + } + signal(SIGINT, int_exit); signal(SIGTERM, int_exit); while (min_port <= max_port) { vip.dport = htons(min_port++); - if (bpf_map_update_elem(map_fd[1], &vip, &tnl, BPF_NOEXIST)) { + if (bpf_map_update_elem(vip2tnl_map_fd, &vip, &tnl, + BPF_NOEXIST)) { perror("bpf_map_update_elem(&vip2tnl)"); return 1; } } - if (bpf_set_link_xdp_fd(ifindex, prog_fd[0], xdp_flags) < 0) { + if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) { printf("link set xdp fd failed\n"); return 1; } + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (err) { + printf("can't get prog info - %s\n", strerror(errno)); + return err; + } + prog_id = info.id; + poll_stats(kill_after_s); bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); diff --git a/samples/bpf/xdpsock.h b/samples/bpf/xdpsock.h deleted file mode 100644 index 533ab81adfa1..000000000000 --- a/samples/bpf/xdpsock.h +++ /dev/null @@ -1,11 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef XDPSOCK_H_ -#define XDPSOCK_H_ - -/* Power-of-2 number of sockets */ -#define MAX_SOCKS 4 - -/* Round-robin receive */ -#define RR_LB 0 - -#endif /* XDPSOCK_H_ */ diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c deleted file mode 100644 index b8ccd0802b3f..000000000000 --- a/samples/bpf/xdpsock_kern.c +++ /dev/null @@ -1,56 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#define KBUILD_MODNAME "foo" -#include <uapi/linux/bpf.h> -#include "bpf_helpers.h" - -#include "xdpsock.h" - -struct bpf_map_def SEC("maps") qidconf_map = { - .type = BPF_MAP_TYPE_ARRAY, - .key_size = sizeof(int), - .value_size = sizeof(int), - .max_entries = 1, -}; - -struct bpf_map_def SEC("maps") xsks_map = { - .type = BPF_MAP_TYPE_XSKMAP, - .key_size = sizeof(int), - .value_size = sizeof(int), - .max_entries = MAX_SOCKS, -}; - -struct bpf_map_def SEC("maps") rr_map = { - .type = BPF_MAP_TYPE_PERCPU_ARRAY, - .key_size = sizeof(int), - .value_size = sizeof(unsigned int), - .max_entries = 1, -}; - -SEC("xdp_sock") -int xdp_sock_prog(struct xdp_md *ctx) -{ - int *qidconf, key = 0, idx; - unsigned int *rr; - - qidconf = bpf_map_lookup_elem(&qidconf_map, &key); - if (!qidconf) - return XDP_ABORTED; - - if (*qidconf != ctx->rx_queue_index) - return XDP_PASS; - -#if RR_LB /* NB! RR_LB is configured in xdpsock.h */ - rr = bpf_map_lookup_elem(&rr_map, &key); - if (!rr) - return XDP_ABORTED; - - *rr = (*rr + 1) & (MAX_SOCKS - 1); - idx = *rr; -#else - idx = 0; -#endif - - return bpf_redirect_map(&xsks_map, idx, 0); -} - -char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index 57ecadc58403..d08ee1ab7bb4 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -1,37 +1,36 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 2017 - 2018 Intel Corporation. */ -#include <assert.h> +#include <asm/barrier.h> #include <errno.h> #include <getopt.h> #include <libgen.h> #include <linux/bpf.h> +#include <linux/compiler.h> #include <linux/if_link.h> #include <linux/if_xdp.h> #include <linux/if_ether.h> +#include <locale.h> +#include <net/ethernet.h> #include <net/if.h> +#include <poll.h> +#include <pthread.h> #include <signal.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <net/ethernet.h> +#include <sys/mman.h> #include <sys/resource.h> #include <sys/socket.h> -#include <sys/mman.h> +#include <sys/types.h> #include <time.h> #include <unistd.h> -#include <pthread.h> -#include <locale.h> -#include <sys/types.h> -#include <poll.h> #include "bpf/libbpf.h" -#include "bpf_util.h" +#include "bpf/xsk.h" #include <bpf/bpf.h> -#include "xdpsock.h" - #ifndef SOL_XDP #define SOL_XDP 283 #endif @@ -44,17 +43,11 @@ #define PF_XDP AF_XDP #endif -#define NUM_FRAMES 131072 -#define FRAME_HEADROOM 0 -#define FRAME_SHIFT 11 -#define FRAME_SIZE 2048 -#define NUM_DESCS 1024 -#define BATCH_SIZE 16 - -#define FQ_NUM_DESCS 1024 -#define CQ_NUM_DESCS 1024 +#define NUM_FRAMES (4 * 1024) +#define BATCH_SIZE 64 #define DEBUG_HEXDUMP 0 +#define MAX_SOCKS 8 typedef __u64 u64; typedef __u32 u32; @@ -68,58 +61,36 @@ enum benchmark_type { }; static enum benchmark_type opt_bench = BENCH_RXDROP; -static u32 opt_xdp_flags; +static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; static const char *opt_if = ""; static int opt_ifindex; static int opt_queue; static int opt_poll; -static int opt_shared_packet_buffer; static int opt_interval = 1; static u32 opt_xdp_bind_flags; +static __u32 prog_id; -struct xdp_umem_uqueue { - u32 cached_prod; - u32 cached_cons; - u32 mask; - u32 size; - u32 *producer; - u32 *consumer; - u64 *ring; - void *map; -}; - -struct xdp_umem { - char *frames; - struct xdp_umem_uqueue fq; - struct xdp_umem_uqueue cq; - int fd; -}; - -struct xdp_uqueue { - u32 cached_prod; - u32 cached_cons; - u32 mask; - u32 size; - u32 *producer; - u32 *consumer; - struct xdp_desc *ring; - void *map; +struct xsk_umem_info { + struct xsk_ring_prod fq; + struct xsk_ring_cons cq; + struct xsk_umem *umem; + void *buffer; }; -struct xdpsock { - struct xdp_uqueue rx; - struct xdp_uqueue tx; - int sfd; - struct xdp_umem *umem; - u32 outstanding_tx; +struct xsk_socket_info { + struct xsk_ring_cons rx; + struct xsk_ring_prod tx; + struct xsk_umem_info *umem; + struct xsk_socket *xsk; unsigned long rx_npkts; unsigned long tx_npkts; unsigned long prev_rx_npkts; unsigned long prev_tx_npkts; + u32 outstanding_tx; }; static int num_socks; -struct xdpsock *xsks[MAX_SOCKS]; +struct xsk_socket_info *xsks[MAX_SOCKS]; static unsigned long get_nsecs(void) { @@ -129,225 +100,124 @@ static unsigned long get_nsecs(void) return ts.tv_sec * 1000000000UL + ts.tv_nsec; } -static void dump_stats(void); - -#define lassert(expr) \ - do { \ - if (!(expr)) { \ - fprintf(stderr, "%s:%s:%i: Assertion failed: " \ - #expr ": errno: %d/\"%s\"\n", \ - __FILE__, __func__, __LINE__, \ - errno, strerror(errno)); \ - dump_stats(); \ - exit(EXIT_FAILURE); \ - } \ - } while (0) - -#define barrier() __asm__ __volatile__("": : :"memory") -#ifdef __aarch64__ -#define u_smp_rmb() __asm__ __volatile__("dmb ishld": : :"memory") -#define u_smp_wmb() __asm__ __volatile__("dmb ishst": : :"memory") -#else -#define u_smp_rmb() barrier() -#define u_smp_wmb() barrier() -#endif -#define likely(x) __builtin_expect(!!(x), 1) -#define unlikely(x) __builtin_expect(!!(x), 0) - -static const char pkt_data[] = - "\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00" - "\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14" - "\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b" - "\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa"; - -static inline u32 umem_nb_free(struct xdp_umem_uqueue *q, u32 nb) -{ - u32 free_entries = q->cached_cons - q->cached_prod; - - if (free_entries >= nb) - return free_entries; - - /* Refresh the local tail pointer */ - q->cached_cons = *q->consumer + q->size; - - return q->cached_cons - q->cached_prod; -} - -static inline u32 xq_nb_free(struct xdp_uqueue *q, u32 ndescs) +static void print_benchmark(bool running) { - u32 free_entries = q->cached_cons - q->cached_prod; + const char *bench_str = "INVALID"; - if (free_entries >= ndescs) - return free_entries; + if (opt_bench == BENCH_RXDROP) + bench_str = "rxdrop"; + else if (opt_bench == BENCH_TXONLY) + bench_str = "txonly"; + else if (opt_bench == BENCH_L2FWD) + bench_str = "l2fwd"; - /* Refresh the local tail pointer */ - q->cached_cons = *q->consumer + q->size; - return q->cached_cons - q->cached_prod; -} + printf("%s:%d %s ", opt_if, opt_queue, bench_str); + if (opt_xdp_flags & XDP_FLAGS_SKB_MODE) + printf("xdp-skb "); + else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE) + printf("xdp-drv "); + else + printf(" "); -static inline u32 umem_nb_avail(struct xdp_umem_uqueue *q, u32 nb) -{ - u32 entries = q->cached_prod - q->cached_cons; + if (opt_poll) + printf("poll() "); - if (entries == 0) { - q->cached_prod = *q->producer; - entries = q->cached_prod - q->cached_cons; + if (running) { + printf("running..."); + fflush(stdout); } - - return (entries > nb) ? nb : entries; } -static inline u32 xq_nb_avail(struct xdp_uqueue *q, u32 ndescs) +static void dump_stats(void) { - u32 entries = q->cached_prod - q->cached_cons; + unsigned long now = get_nsecs(); + long dt = now - prev_time; + int i; - if (entries == 0) { - q->cached_prod = *q->producer; - entries = q->cached_prod - q->cached_cons; - } + prev_time = now; - return (entries > ndescs) ? ndescs : entries; -} + for (i = 0; i < num_socks && xsks[i]; i++) { + char *fmt = "%-15s %'-11.0f %'-11lu\n"; + double rx_pps, tx_pps; -static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq, - struct xdp_desc *d, - size_t nb) -{ - u32 i; + rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) * + 1000000000. / dt; + tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) * + 1000000000. / dt; - if (umem_nb_free(fq, nb) < nb) - return -ENOSPC; + printf("\n sock%d@", i); + print_benchmark(false); + printf("\n"); - for (i = 0; i < nb; i++) { - u32 idx = fq->cached_prod++ & fq->mask; + printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts", + dt / 1000000000.); + printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts); + printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts); - fq->ring[idx] = d[i].addr; + xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts; + xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts; } - - u_smp_wmb(); - - *fq->producer = fq->cached_prod; - - return 0; } -static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u64 *d, - size_t nb) +static void *poller(void *arg) { - u32 i; - - if (umem_nb_free(fq, nb) < nb) - return -ENOSPC; - - for (i = 0; i < nb; i++) { - u32 idx = fq->cached_prod++ & fq->mask; - - fq->ring[idx] = d[i]; + (void)arg; + for (;;) { + sleep(opt_interval); + dump_stats(); } - u_smp_wmb(); - - *fq->producer = fq->cached_prod; - - return 0; + return NULL; } -static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq, - u64 *d, size_t nb) +static void remove_xdp_program(void) { - u32 idx, i, entries = umem_nb_avail(cq, nb); - - u_smp_rmb(); + __u32 curr_prog_id = 0; - for (i = 0; i < entries; i++) { - idx = cq->cached_cons++ & cq->mask; - d[i] = cq->ring[idx]; - } - - if (entries > 0) { - u_smp_wmb(); - - *cq->consumer = cq->cached_cons; + if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(EXIT_FAILURE); } - - return entries; -} - -static inline void *xq_get_data(struct xdpsock *xsk, u64 addr) -{ - return &xsk->umem->frames[addr]; + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on a given interface\n"); + else + printf("program on interface changed, not removing\n"); } -static inline int xq_enq(struct xdp_uqueue *uq, - const struct xdp_desc *descs, - unsigned int ndescs) +static void int_exit(int sig) { - struct xdp_desc *r = uq->ring; - unsigned int i; - - if (xq_nb_free(uq, ndescs) < ndescs) - return -ENOSPC; + struct xsk_umem *umem = xsks[0]->umem->umem; - for (i = 0; i < ndescs; i++) { - u32 idx = uq->cached_prod++ & uq->mask; - - r[idx].addr = descs[i].addr; - r[idx].len = descs[i].len; - } + (void)sig; - u_smp_wmb(); + dump_stats(); + xsk_socket__delete(xsks[0]->xsk); + (void)xsk_umem__delete(umem); + remove_xdp_program(); - *uq->producer = uq->cached_prod; - return 0; + exit(EXIT_SUCCESS); } -static inline int xq_enq_tx_only(struct xdp_uqueue *uq, - unsigned int id, unsigned int ndescs) +static void __exit_with_error(int error, const char *file, const char *func, + int line) { - struct xdp_desc *r = uq->ring; - unsigned int i; - - if (xq_nb_free(uq, ndescs) < ndescs) - return -ENOSPC; - - for (i = 0; i < ndescs; i++) { - u32 idx = uq->cached_prod++ & uq->mask; - - r[idx].addr = (id + i) << FRAME_SHIFT; - r[idx].len = sizeof(pkt_data) - 1; - } - - u_smp_wmb(); - - *uq->producer = uq->cached_prod; - return 0; + fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func, + line, error, strerror(error)); + dump_stats(); + remove_xdp_program(); + exit(EXIT_FAILURE); } -static inline int xq_deq(struct xdp_uqueue *uq, - struct xdp_desc *descs, - int ndescs) -{ - struct xdp_desc *r = uq->ring; - unsigned int idx; - int i, entries; - - entries = xq_nb_avail(uq, ndescs); +#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \ + __LINE__) - u_smp_rmb(); - - for (i = 0; i < entries; i++) { - idx = uq->cached_cons++ & uq->mask; - descs[i] = r[idx]; - } - - if (entries > 0) { - u_smp_wmb(); - - *uq->consumer = uq->cached_cons; - } - - return entries; -} +static const char pkt_data[] = + "\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00" + "\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14" + "\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b" + "\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa"; static void swap_mac_addresses(void *data) { @@ -396,247 +266,74 @@ static void hex_dump(void *pkt, size_t length, u64 addr) printf("\n"); } -static size_t gen_eth_frame(char *frame) +static size_t gen_eth_frame(struct xsk_umem_info *umem, u64 addr) { - memcpy(frame, pkt_data, sizeof(pkt_data) - 1); + memcpy(xsk_umem__get_data(umem->buffer, addr), pkt_data, + sizeof(pkt_data) - 1); return sizeof(pkt_data) - 1; } -static struct xdp_umem *xdp_umem_configure(int sfd) +static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size) { - int fq_size = FQ_NUM_DESCS, cq_size = CQ_NUM_DESCS; - struct xdp_mmap_offsets off; - struct xdp_umem_reg mr; - struct xdp_umem *umem; - socklen_t optlen; - void *bufs; + struct xsk_umem_info *umem; + int ret; umem = calloc(1, sizeof(*umem)); - lassert(umem); - - lassert(posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */ - NUM_FRAMES * FRAME_SIZE) == 0); - - mr.addr = (__u64)bufs; - mr.len = NUM_FRAMES * FRAME_SIZE; - mr.chunk_size = FRAME_SIZE; - mr.headroom = FRAME_HEADROOM; - - lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &mr, sizeof(mr)) == 0); - lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_FILL_RING, &fq_size, - sizeof(int)) == 0); - lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_COMPLETION_RING, &cq_size, - sizeof(int)) == 0); - - optlen = sizeof(off); - lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off, - &optlen) == 0); - - umem->fq.map = mmap(0, off.fr.desc + - FQ_NUM_DESCS * sizeof(u64), - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_POPULATE, sfd, - XDP_UMEM_PGOFF_FILL_RING); - lassert(umem->fq.map != MAP_FAILED); - - umem->fq.mask = FQ_NUM_DESCS - 1; - umem->fq.size = FQ_NUM_DESCS; - umem->fq.producer = umem->fq.map + off.fr.producer; - umem->fq.consumer = umem->fq.map + off.fr.consumer; - umem->fq.ring = umem->fq.map + off.fr.desc; - umem->fq.cached_cons = FQ_NUM_DESCS; - - umem->cq.map = mmap(0, off.cr.desc + - CQ_NUM_DESCS * sizeof(u64), - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_POPULATE, sfd, - XDP_UMEM_PGOFF_COMPLETION_RING); - lassert(umem->cq.map != MAP_FAILED); - - umem->cq.mask = CQ_NUM_DESCS - 1; - umem->cq.size = CQ_NUM_DESCS; - umem->cq.producer = umem->cq.map + off.cr.producer; - umem->cq.consumer = umem->cq.map + off.cr.consumer; - umem->cq.ring = umem->cq.map + off.cr.desc; - - umem->frames = bufs; - umem->fd = sfd; + if (!umem) + exit_with_error(errno); - if (opt_bench == BENCH_TXONLY) { - int i; - - for (i = 0; i < NUM_FRAMES * FRAME_SIZE; i += FRAME_SIZE) - (void)gen_eth_frame(&umem->frames[i]); - } + ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq, + NULL); + if (ret) + exit_with_error(-ret); + umem->buffer = buffer; return umem; } -static struct xdpsock *xsk_configure(struct xdp_umem *umem) +static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem) { - struct sockaddr_xdp sxdp = {}; - struct xdp_mmap_offsets off; - int sfd, ndescs = NUM_DESCS; - struct xdpsock *xsk; - bool shared = true; - socklen_t optlen; - u64 i; - - sfd = socket(PF_XDP, SOCK_RAW, 0); - lassert(sfd >= 0); + struct xsk_socket_config cfg; + struct xsk_socket_info *xsk; + int ret; + u32 idx; + int i; xsk = calloc(1, sizeof(*xsk)); - lassert(xsk); - - xsk->sfd = sfd; - xsk->outstanding_tx = 0; - - if (!umem) { - shared = false; - xsk->umem = xdp_umem_configure(sfd); - } else { - xsk->umem = umem; - } - - lassert(setsockopt(sfd, SOL_XDP, XDP_RX_RING, - &ndescs, sizeof(int)) == 0); - lassert(setsockopt(sfd, SOL_XDP, XDP_TX_RING, - &ndescs, sizeof(int)) == 0); - optlen = sizeof(off); - lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off, - &optlen) == 0); - - /* Rx */ - xsk->rx.map = mmap(NULL, - off.rx.desc + - NUM_DESCS * sizeof(struct xdp_desc), - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_POPULATE, sfd, - XDP_PGOFF_RX_RING); - lassert(xsk->rx.map != MAP_FAILED); - - if (!shared) { - for (i = 0; i < NUM_DESCS * FRAME_SIZE; i += FRAME_SIZE) - lassert(umem_fill_to_kernel(&xsk->umem->fq, &i, 1) - == 0); - } - - /* Tx */ - xsk->tx.map = mmap(NULL, - off.tx.desc + - NUM_DESCS * sizeof(struct xdp_desc), - PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_POPULATE, sfd, - XDP_PGOFF_TX_RING); - lassert(xsk->tx.map != MAP_FAILED); - - xsk->rx.mask = NUM_DESCS - 1; - xsk->rx.size = NUM_DESCS; - xsk->rx.producer = xsk->rx.map + off.rx.producer; - xsk->rx.consumer = xsk->rx.map + off.rx.consumer; - xsk->rx.ring = xsk->rx.map + off.rx.desc; - - xsk->tx.mask = NUM_DESCS - 1; - xsk->tx.size = NUM_DESCS; - xsk->tx.producer = xsk->tx.map + off.tx.producer; - xsk->tx.consumer = xsk->tx.map + off.tx.consumer; - xsk->tx.ring = xsk->tx.map + off.tx.desc; - xsk->tx.cached_cons = NUM_DESCS; - - sxdp.sxdp_family = PF_XDP; - sxdp.sxdp_ifindex = opt_ifindex; - sxdp.sxdp_queue_id = opt_queue; - - if (shared) { - sxdp.sxdp_flags = XDP_SHARED_UMEM; - sxdp.sxdp_shared_umem_fd = umem->fd; - } else { - sxdp.sxdp_flags = opt_xdp_bind_flags; - } - - lassert(bind(sfd, (struct sockaddr *)&sxdp, sizeof(sxdp)) == 0); + if (!xsk) + exit_with_error(errno); + + xsk->umem = umem; + cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS; + cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS; + cfg.libbpf_flags = 0; + cfg.xdp_flags = opt_xdp_flags; + cfg.bind_flags = opt_xdp_bind_flags; + ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem, + &xsk->rx, &xsk->tx, &cfg); + if (ret) + exit_with_error(-ret); + + ret = bpf_get_link_xdp_id(opt_ifindex, &prog_id, opt_xdp_flags); + if (ret) + exit_with_error(-ret); + + ret = xsk_ring_prod__reserve(&xsk->umem->fq, + XSK_RING_PROD__DEFAULT_NUM_DESCS, + &idx); + if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS) + exit_with_error(-ret); + for (i = 0; + i < XSK_RING_PROD__DEFAULT_NUM_DESCS * + XSK_UMEM__DEFAULT_FRAME_SIZE; + i += XSK_UMEM__DEFAULT_FRAME_SIZE) + *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx++) = i; + xsk_ring_prod__submit(&xsk->umem->fq, + XSK_RING_PROD__DEFAULT_NUM_DESCS); return xsk; } -static void print_benchmark(bool running) -{ - const char *bench_str = "INVALID"; - - if (opt_bench == BENCH_RXDROP) - bench_str = "rxdrop"; - else if (opt_bench == BENCH_TXONLY) - bench_str = "txonly"; - else if (opt_bench == BENCH_L2FWD) - bench_str = "l2fwd"; - - printf("%s:%d %s ", opt_if, opt_queue, bench_str); - if (opt_xdp_flags & XDP_FLAGS_SKB_MODE) - printf("xdp-skb "); - else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE) - printf("xdp-drv "); - else - printf(" "); - - if (opt_poll) - printf("poll() "); - - if (running) { - printf("running..."); - fflush(stdout); - } -} - -static void dump_stats(void) -{ - unsigned long now = get_nsecs(); - long dt = now - prev_time; - int i; - - prev_time = now; - - for (i = 0; i < num_socks && xsks[i]; i++) { - char *fmt = "%-15s %'-11.0f %'-11lu\n"; - double rx_pps, tx_pps; - - rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) * - 1000000000. / dt; - tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) * - 1000000000. / dt; - - printf("\n sock%d@", i); - print_benchmark(false); - printf("\n"); - - printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts", - dt / 1000000000.); - printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts); - printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts); - - xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts; - xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts; - } -} - -static void *poller(void *arg) -{ - (void)arg; - for (;;) { - sleep(opt_interval); - dump_stats(); - } - - return NULL; -} - -static void int_exit(int sig) -{ - (void)sig; - dump_stats(); - bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags); - exit(EXIT_SUCCESS); -} - static struct option long_options[] = { {"rxdrop", no_argument, 0, 'r'}, {"txonly", no_argument, 0, 't'}, @@ -644,7 +341,6 @@ static struct option long_options[] = { {"interface", required_argument, 0, 'i'}, {"queue", required_argument, 0, 'q'}, {"poll", no_argument, 0, 'p'}, - {"shared-buffer", no_argument, 0, 's'}, {"xdp-skb", no_argument, 0, 'S'}, {"xdp-native", no_argument, 0, 'N'}, {"interval", required_argument, 0, 'n'}, @@ -664,7 +360,6 @@ static void usage(const char *prog) " -i, --interface=n Run on interface n\n" " -q, --queue=n Use queue n (default 0)\n" " -p, --poll Use poll syscall\n" - " -s, --shared-buffer Use shared packet buffer\n" " -S, --xdp-skb=n Use XDP skb-mod\n" " -N, --xdp-native=n Enfore XDP native mode\n" " -n, --interval=n Specify statistics update interval (default 1 sec).\n" @@ -682,7 +377,7 @@ static void parse_command_line(int argc, char **argv) opterr = 0; for (;;) { - c = getopt_long(argc, argv, "rtli:q:psSNn:cz", long_options, + c = getopt_long(argc, argv, "Frtli:q:psSNn:cz", long_options, &option_index); if (c == -1) break; @@ -703,9 +398,6 @@ static void parse_command_line(int argc, char **argv) case 'q': opt_queue = atoi(optarg); break; - case 's': - opt_shared_packet_buffer = 1; - break; case 'p': opt_poll = 1; break; @@ -725,6 +417,9 @@ static void parse_command_line(int argc, char **argv) case 'c': opt_xdp_bind_flags |= XDP_COPY; break; + case 'F': + opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; default: usage(basename(argv[0])); } @@ -736,75 +431,104 @@ static void parse_command_line(int argc, char **argv) opt_if); usage(basename(argv[0])); } + } -static void kick_tx(int fd) +static void kick_tx(struct xsk_socket_info *xsk) { int ret; - ret = sendto(fd, NULL, 0, MSG_DONTWAIT, NULL, 0); + ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0); if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY) return; - lassert(0); + exit_with_error(errno); } -static inline void complete_tx_l2fwd(struct xdpsock *xsk) +static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk) { - u64 descs[BATCH_SIZE]; + u32 idx_cq = 0, idx_fq = 0; unsigned int rcvd; size_t ndescs; if (!xsk->outstanding_tx) return; - kick_tx(xsk->sfd); + kick_tx(xsk); ndescs = (xsk->outstanding_tx > BATCH_SIZE) ? BATCH_SIZE : - xsk->outstanding_tx; + xsk->outstanding_tx; /* re-add completed Tx buffers */ - rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, ndescs); + rcvd = xsk_ring_cons__peek(&xsk->umem->cq, ndescs, &idx_cq); if (rcvd > 0) { - umem_fill_to_kernel(&xsk->umem->fq, descs, rcvd); + unsigned int i; + int ret; + + ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq); + while (ret != rcvd) { + if (ret < 0) + exit_with_error(-ret); + ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, + &idx_fq); + } + for (i = 0; i < rcvd; i++) + *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = + *xsk_ring_cons__comp_addr(&xsk->umem->cq, + idx_cq++); + + xsk_ring_prod__submit(&xsk->umem->fq, rcvd); + xsk_ring_cons__release(&xsk->umem->cq, rcvd); xsk->outstanding_tx -= rcvd; xsk->tx_npkts += rcvd; } } -static inline void complete_tx_only(struct xdpsock *xsk) +static inline void complete_tx_only(struct xsk_socket_info *xsk) { - u64 descs[BATCH_SIZE]; unsigned int rcvd; + u32 idx; if (!xsk->outstanding_tx) return; - kick_tx(xsk->sfd); + kick_tx(xsk); - rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, BATCH_SIZE); + rcvd = xsk_ring_cons__peek(&xsk->umem->cq, BATCH_SIZE, &idx); if (rcvd > 0) { + xsk_ring_cons__release(&xsk->umem->cq, rcvd); xsk->outstanding_tx -= rcvd; xsk->tx_npkts += rcvd; } } -static void rx_drop(struct xdpsock *xsk) +static void rx_drop(struct xsk_socket_info *xsk) { - struct xdp_desc descs[BATCH_SIZE]; unsigned int rcvd, i; + u32 idx_rx = 0, idx_fq = 0; + int ret; - rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE); + rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx); if (!rcvd) return; + ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq); + while (ret != rcvd) { + if (ret < 0) + exit_with_error(-ret); + ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq); + } + for (i = 0; i < rcvd; i++) { - char *pkt = xq_get_data(xsk, descs[i].addr); + u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr; + u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len; + char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr); - hex_dump(pkt, descs[i].len, descs[i].addr); + hex_dump(pkt, len, addr); + *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = addr; } + xsk_ring_prod__submit(&xsk->umem->fq, rcvd); + xsk_ring_cons__release(&xsk->rx, rcvd); xsk->rx_npkts += rcvd; - - umem_fill_to_kernel_ex(&xsk->umem->fq, descs, rcvd); } static void rx_drop_all(void) @@ -815,7 +539,7 @@ static void rx_drop_all(void) memset(fds, 0, sizeof(fds)); for (i = 0; i < num_socks; i++) { - fds[i].fd = xsks[i]->sfd; + fds[i].fd = xsk_socket__fd(xsks[i]->xsk); fds[i].events = POLLIN; timeout = 1000; /* 1sn */ } @@ -832,14 +556,14 @@ static void rx_drop_all(void) } } -static void tx_only(struct xdpsock *xsk) +static void tx_only(struct xsk_socket_info *xsk) { int timeout, ret, nfds = 1; struct pollfd fds[nfds + 1]; - unsigned int idx = 0; + u32 idx, frame_nb = 0; memset(fds, 0, sizeof(fds)); - fds[0].fd = xsk->sfd; + fds[0].fd = xsk_socket__fd(xsk->xsk); fds[0].events = POLLOUT; timeout = 1000; /* 1sn */ @@ -849,50 +573,73 @@ static void tx_only(struct xdpsock *xsk) if (ret <= 0) continue; - if (fds[0].fd != xsk->sfd || - !(fds[0].revents & POLLOUT)) + if (!(fds[0].revents & POLLOUT)) continue; } - if (xq_nb_free(&xsk->tx, BATCH_SIZE) >= BATCH_SIZE) { - lassert(xq_enq_tx_only(&xsk->tx, idx, BATCH_SIZE) == 0); + if (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) == + BATCH_SIZE) { + unsigned int i; + for (i = 0; i < BATCH_SIZE; i++) { + xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->addr + = (frame_nb + i) << + XSK_UMEM__DEFAULT_FRAME_SHIFT; + xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->len = + sizeof(pkt_data) - 1; + } + + xsk_ring_prod__submit(&xsk->tx, BATCH_SIZE); xsk->outstanding_tx += BATCH_SIZE; - idx += BATCH_SIZE; - idx %= NUM_FRAMES; + frame_nb += BATCH_SIZE; + frame_nb %= NUM_FRAMES; } complete_tx_only(xsk); } } -static void l2fwd(struct xdpsock *xsk) +static void l2fwd(struct xsk_socket_info *xsk) { for (;;) { - struct xdp_desc descs[BATCH_SIZE]; unsigned int rcvd, i; + u32 idx_rx = 0, idx_tx = 0; int ret; for (;;) { complete_tx_l2fwd(xsk); - rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE); + rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, + &idx_rx); if (rcvd > 0) break; } + ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx); + while (ret != rcvd) { + if (ret < 0) + exit_with_error(-ret); + ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx); + } + for (i = 0; i < rcvd; i++) { - char *pkt = xq_get_data(xsk, descs[i].addr); + u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, + idx_rx)->addr; + u32 len = xsk_ring_cons__rx_desc(&xsk->rx, + idx_rx++)->len; + char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr); swap_mac_addresses(pkt); - hex_dump(pkt, descs[i].len, descs[i].addr); + hex_dump(pkt, len, addr); + xsk_ring_prod__tx_desc(&xsk->tx, idx_tx)->addr = addr; + xsk_ring_prod__tx_desc(&xsk->tx, idx_tx++)->len = len; } - xsk->rx_npkts += rcvd; + xsk_ring_prod__submit(&xsk->tx, rcvd); + xsk_ring_cons__release(&xsk->rx, rcvd); - ret = xq_enq(&xsk->tx, descs, rcvd); - lassert(ret == 0); + xsk->rx_npkts += rcvd; xsk->outstanding_tx += rcvd; } } @@ -900,15 +647,10 @@ static void l2fwd(struct xdpsock *xsk) int main(int argc, char **argv) { struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; - struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_XDP, - }; - int prog_fd, qidconf_map, xsks_map; - struct bpf_object *obj; - char xdp_filename[256]; - struct bpf_map *map; - int i, ret, key = 0; + struct xsk_umem_info *umem; pthread_t pt; + void *bufs; + int ret; parse_command_line(argc, argv); @@ -918,60 +660,22 @@ int main(int argc, char **argv) exit(EXIT_FAILURE); } - snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]); - prog_load_attr.file = xdp_filename; - - if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) - exit(EXIT_FAILURE); - if (prog_fd < 0) { - fprintf(stderr, "ERROR: no program found: %s\n", - strerror(prog_fd)); - exit(EXIT_FAILURE); - } - - map = bpf_object__find_map_by_name(obj, "qidconf_map"); - qidconf_map = bpf_map__fd(map); - if (qidconf_map < 0) { - fprintf(stderr, "ERROR: no qidconf map found: %s\n", - strerror(qidconf_map)); - exit(EXIT_FAILURE); - } + ret = posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */ + NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE); + if (ret) + exit_with_error(ret); - map = bpf_object__find_map_by_name(obj, "xsks_map"); - xsks_map = bpf_map__fd(map); - if (xsks_map < 0) { - fprintf(stderr, "ERROR: no xsks map found: %s\n", - strerror(xsks_map)); - exit(EXIT_FAILURE); - } + /* Create sockets... */ + umem = xsk_configure_umem(bufs, + NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE); + xsks[num_socks++] = xsk_configure_socket(umem); - if (bpf_set_link_xdp_fd(opt_ifindex, prog_fd, opt_xdp_flags) < 0) { - fprintf(stderr, "ERROR: link set xdp fd failed\n"); - exit(EXIT_FAILURE); - } - - ret = bpf_map_update_elem(qidconf_map, &key, &opt_queue, 0); - if (ret) { - fprintf(stderr, "ERROR: bpf_map_update_elem qidconf\n"); - exit(EXIT_FAILURE); - } - - /* Create sockets... */ - xsks[num_socks++] = xsk_configure(NULL); - -#if RR_LB - for (i = 0; i < MAX_SOCKS - 1; i++) - xsks[num_socks++] = xsk_configure(xsks[0]->umem); -#endif + if (opt_bench == BENCH_TXONLY) { + int i; - /* ...and insert them into the map. */ - for (i = 0; i < num_socks; i++) { - key = i; - ret = bpf_map_update_elem(xsks_map, &key, &xsks[i]->sfd, 0); - if (ret) { - fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i); - exit(EXIT_FAILURE); - } + for (i = 0; i < NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE; + i += XSK_UMEM__DEFAULT_FRAME_SIZE) + (void)gen_eth_frame(umem, i); } signal(SIGINT, int_exit); @@ -981,7 +685,8 @@ int main(int argc, char **argv) setlocale(LC_ALL, ""); ret = pthread_create(&pt, NULL, poller, NULL); - lassert(ret == 0); + if (ret) + exit_with_error(ret); prev_time = get_nsecs(); diff --git a/samples/livepatch/livepatch-callbacks-demo.c b/samples/livepatch/livepatch-callbacks-demo.c index 72f9e6d1387b..62d97953ad02 100644 --- a/samples/livepatch/livepatch-callbacks-demo.c +++ b/samples/livepatch/livepatch-callbacks-demo.c @@ -195,22 +195,11 @@ static struct klp_patch patch = { static int livepatch_callbacks_demo_init(void) { - int ret; - - ret = klp_register_patch(&patch); - if (ret) - return ret; - ret = klp_enable_patch(&patch); - if (ret) { - WARN_ON(klp_unregister_patch(&patch)); - return ret; - } - return 0; + return klp_enable_patch(&patch); } static void livepatch_callbacks_demo_exit(void) { - WARN_ON(klp_unregister_patch(&patch)); } module_init(livepatch_callbacks_demo_init); diff --git a/samples/livepatch/livepatch-sample.c b/samples/livepatch/livepatch-sample.c index 2d554dd930e2..01c9cf003ca2 100644 --- a/samples/livepatch/livepatch-sample.c +++ b/samples/livepatch/livepatch-sample.c @@ -69,22 +69,11 @@ static struct klp_patch patch = { static int livepatch_init(void) { - int ret; - - ret = klp_register_patch(&patch); - if (ret) - return ret; - ret = klp_enable_patch(&patch); - if (ret) { - WARN_ON(klp_unregister_patch(&patch)); - return ret; - } - return 0; + return klp_enable_patch(&patch); } static void livepatch_exit(void) { - WARN_ON(klp_unregister_patch(&patch)); } module_init(livepatch_init); diff --git a/samples/livepatch/livepatch-shadow-fix1.c b/samples/livepatch/livepatch-shadow-fix1.c index e8f1bd6b29b1..67a73e5e986e 100644 --- a/samples/livepatch/livepatch-shadow-fix1.c +++ b/samples/livepatch/livepatch-shadow-fix1.c @@ -71,7 +71,7 @@ static int shadow_leak_ctor(void *obj, void *shadow_data, void *ctor_data) return 0; } -struct dummy *livepatch_fix1_dummy_alloc(void) +static struct dummy *livepatch_fix1_dummy_alloc(void) { struct dummy *d; void *leak; @@ -113,7 +113,7 @@ static void livepatch_fix1_dummy_leak_dtor(void *obj, void *shadow_data) __func__, d, *shadow_leak); } -void livepatch_fix1_dummy_free(struct dummy *d) +static void livepatch_fix1_dummy_free(struct dummy *d) { void **shadow_leak; @@ -157,25 +157,13 @@ static struct klp_patch patch = { static int livepatch_shadow_fix1_init(void) { - int ret; - - ret = klp_register_patch(&patch); - if (ret) - return ret; - ret = klp_enable_patch(&patch); - if (ret) { - WARN_ON(klp_unregister_patch(&patch)); - return ret; - } - return 0; + return klp_enable_patch(&patch); } static void livepatch_shadow_fix1_exit(void) { /* Cleanup any existing SV_LEAK shadow variables */ klp_shadow_free_all(SV_LEAK, livepatch_fix1_dummy_leak_dtor); - - WARN_ON(klp_unregister_patch(&patch)); } module_init(livepatch_shadow_fix1_init); diff --git a/samples/livepatch/livepatch-shadow-fix2.c b/samples/livepatch/livepatch-shadow-fix2.c index b34c7bf83356..91c21d52cfea 100644 --- a/samples/livepatch/livepatch-shadow-fix2.c +++ b/samples/livepatch/livepatch-shadow-fix2.c @@ -50,7 +50,7 @@ struct dummy { unsigned long jiffies_expire; }; -bool livepatch_fix2_dummy_check(struct dummy *d, unsigned long jiffies) +static bool livepatch_fix2_dummy_check(struct dummy *d, unsigned long jiffies) { int *shadow_count; @@ -78,7 +78,7 @@ static void livepatch_fix2_dummy_leak_dtor(void *obj, void *shadow_data) __func__, d, *shadow_leak); } -void livepatch_fix2_dummy_free(struct dummy *d) +static void livepatch_fix2_dummy_free(struct dummy *d) { void **shadow_leak; int *shadow_count; @@ -129,25 +129,13 @@ static struct klp_patch patch = { static int livepatch_shadow_fix2_init(void) { - int ret; - - ret = klp_register_patch(&patch); - if (ret) - return ret; - ret = klp_enable_patch(&patch); - if (ret) { - WARN_ON(klp_unregister_patch(&patch)); - return ret; - } - return 0; + return klp_enable_patch(&patch); } static void livepatch_shadow_fix2_exit(void) { /* Cleanup any existing SV_COUNTER shadow variables */ klp_shadow_free_all(SV_COUNTER, NULL); - - WARN_ON(klp_unregister_patch(&patch)); } module_init(livepatch_shadow_fix2_init); diff --git a/samples/livepatch/livepatch-shadow-mod.c b/samples/livepatch/livepatch-shadow-mod.c index 4aa8a88d3cd6..4d79c6dc055b 100644 --- a/samples/livepatch/livepatch-shadow-mod.c +++ b/samples/livepatch/livepatch-shadow-mod.c @@ -96,15 +96,15 @@ MODULE_DESCRIPTION("Buggy module for shadow variable demo"); * Keep a list of all the dummies so we can clean up any residual ones * on module exit */ -LIST_HEAD(dummy_list); -DEFINE_MUTEX(dummy_list_mutex); +static LIST_HEAD(dummy_list); +static DEFINE_MUTEX(dummy_list_mutex); struct dummy { struct list_head list; unsigned long jiffies_expire; }; -noinline struct dummy *dummy_alloc(void) +static __used noinline struct dummy *dummy_alloc(void) { struct dummy *d; void *leak; @@ -129,7 +129,7 @@ noinline struct dummy *dummy_alloc(void) return d; } -noinline void dummy_free(struct dummy *d) +static __used noinline void dummy_free(struct dummy *d) { pr_info("%s: dummy @ %p, expired = %lx\n", __func__, d, d->jiffies_expire); @@ -137,7 +137,8 @@ noinline void dummy_free(struct dummy *d) kfree(d); } -noinline bool dummy_check(struct dummy *d, unsigned long jiffies) +static __used noinline bool dummy_check(struct dummy *d, + unsigned long jiffies) { return time_after(jiffies, d->jiffies_expire); } diff --git a/samples/mei/mei-amt-version.c b/samples/mei/mei-amt-version.c index 33e67bd1dc34..32234481ad7d 100644 --- a/samples/mei/mei-amt-version.c +++ b/samples/mei/mei-amt-version.c @@ -117,7 +117,7 @@ static bool mei_init(struct mei *me, const uuid_le *guid, me->verbose = verbose; - me->fd = open("/dev/mei", O_RDWR); + me->fd = open("/dev/mei0", O_RDWR); if (me->fd == -1) { mei_err(me, "Cannot establish a handle to the Intel MEI driver\n"); goto err; diff --git a/samples/mic/mpssd/mpssd.h b/samples/mic/mpssd/mpssd.h index 8bd64944aacc..82d3b519f0e7 100644 --- a/samples/mic/mpssd/mpssd.h +++ b/samples/mic/mpssd/mpssd.h @@ -37,21 +37,18 @@ #include <sys/types.h> #include <sys/socket.h> #include <sys/stat.h> -#include <sys/types.h> #include <sys/mman.h> #include <sys/utsname.h> #include <sys/wait.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> -#include <pthread.h> #include <signal.h> #include <limits.h> #include <syslog.h> #include <getopt.h> #include <net/if.h> #include <linux/if_tun.h> -#include <linux/if_tun.h> #include <linux/virtio_ids.h> #define MICSYSFSDIR "/sys/class/mic" diff --git a/samples/seccomp/Makefile b/samples/seccomp/Makefile index 4920903c8009..fb43a814d4c0 100644 --- a/samples/seccomp/Makefile +++ b/samples/seccomp/Makefile @@ -34,6 +34,7 @@ HOSTCFLAGS_bpf-direct.o += $(MFLAG) HOSTCFLAGS_dropper.o += $(MFLAG) HOSTCFLAGS_bpf-helper.o += $(MFLAG) HOSTCFLAGS_bpf-fancy.o += $(MFLAG) +HOSTCFLAGS_user-trap.o += $(MFLAG) HOSTLDLIBS_bpf-direct += $(MFLAG) HOSTLDLIBS_bpf-fancy += $(MFLAG) HOSTLDLIBS_dropper += $(MFLAG) diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index ca7960adf5a3..b038aa9f5a70 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -1448,13 +1448,13 @@ static int __init mbochs_dev_init(void) { int ret = 0; - ret = alloc_chrdev_region(&mbochs_devt, 0, MINORMASK, MBOCHS_NAME); + ret = alloc_chrdev_region(&mbochs_devt, 0, MINORMASK + 1, MBOCHS_NAME); if (ret < 0) { pr_err("Error: failed to register mbochs_dev, err: %d\n", ret); return ret; } cdev_init(&mbochs_cdev, &vd_fops); - cdev_add(&mbochs_cdev, mbochs_devt, MINORMASK); + cdev_add(&mbochs_cdev, mbochs_devt, MINORMASK + 1); pr_info("%s: major %d\n", __func__, MAJOR(mbochs_devt)); mbochs_class = class_create(THIS_MODULE, MBOCHS_CLASS_NAME); @@ -1483,7 +1483,7 @@ failed2: class_destroy(mbochs_class); failed1: cdev_del(&mbochs_cdev); - unregister_chrdev_region(mbochs_devt, MINORMASK); + unregister_chrdev_region(mbochs_devt, MINORMASK + 1); return ret; } @@ -1494,7 +1494,7 @@ static void __exit mbochs_dev_exit(void) device_unregister(&mbochs_dev); cdev_del(&mbochs_cdev); - unregister_chrdev_region(mbochs_devt, MINORMASK); + unregister_chrdev_region(mbochs_devt, MINORMASK + 1); class_destroy(mbochs_class); mbochs_class = NULL; } diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index 96e7969c473a..cc86bf6566e4 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -752,13 +752,13 @@ static int __init mdpy_dev_init(void) { int ret = 0; - ret = alloc_chrdev_region(&mdpy_devt, 0, MINORMASK, MDPY_NAME); + ret = alloc_chrdev_region(&mdpy_devt, 0, MINORMASK + 1, MDPY_NAME); if (ret < 0) { pr_err("Error: failed to register mdpy_dev, err: %d\n", ret); return ret; } cdev_init(&mdpy_cdev, &vd_fops); - cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK); + cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK + 1); pr_info("%s: major %d\n", __func__, MAJOR(mdpy_devt)); mdpy_class = class_create(THIS_MODULE, MDPY_CLASS_NAME); @@ -787,7 +787,7 @@ failed2: class_destroy(mdpy_class); failed1: cdev_del(&mdpy_cdev); - unregister_chrdev_region(mdpy_devt, MINORMASK); + unregister_chrdev_region(mdpy_devt, MINORMASK + 1); return ret; } @@ -798,7 +798,7 @@ static void __exit mdpy_dev_exit(void) device_unregister(&mdpy_dev); cdev_del(&mdpy_cdev); - unregister_chrdev_region(mdpy_devt, MINORMASK); + unregister_chrdev_region(mdpy_devt, MINORMASK + 1); class_destroy(mdpy_class); mdpy_class = NULL; } diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index f6732aa16bb1..1c77c370c92f 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -156,15 +156,15 @@ static const struct file_operations vd_fops = { /* function prototypes */ -static int mtty_trigger_interrupt(uuid_le uuid); +static int mtty_trigger_interrupt(const guid_t *uuid); /* Helper functions */ -static struct mdev_state *find_mdev_state_by_uuid(uuid_le uuid) +static struct mdev_state *find_mdev_state_by_uuid(const guid_t *uuid) { struct mdev_state *mds; list_for_each_entry(mds, &mdev_devices_list, next) { - if (uuid_le_cmp(mdev_uuid(mds->mdev), uuid) == 0) + if (guid_equal(mdev_uuid(mds->mdev), uuid)) return mds; } @@ -1032,7 +1032,7 @@ static int mtty_set_irqs(struct mdev_device *mdev, uint32_t flags, return ret; } -static int mtty_trigger_interrupt(uuid_le uuid) +static int mtty_trigger_interrupt(const guid_t *uuid) { int ret = -1; struct mdev_state *mdev_state; @@ -1442,7 +1442,8 @@ static int __init mtty_dev_init(void) idr_init(&mtty_dev.vd_idr); - ret = alloc_chrdev_region(&mtty_dev.vd_devt, 0, MINORMASK, MTTY_NAME); + ret = alloc_chrdev_region(&mtty_dev.vd_devt, 0, MINORMASK + 1, + MTTY_NAME); if (ret < 0) { pr_err("Error: failed to register mtty_dev, err:%d\n", ret); @@ -1450,7 +1451,7 @@ static int __init mtty_dev_init(void) } cdev_init(&mtty_dev.vd_cdev, &vd_fops); - cdev_add(&mtty_dev.vd_cdev, mtty_dev.vd_devt, MINORMASK); + cdev_add(&mtty_dev.vd_cdev, mtty_dev.vd_devt, MINORMASK + 1); pr_info("major_number:%d\n", MAJOR(mtty_dev.vd_devt)); @@ -1487,7 +1488,7 @@ failed2: failed1: cdev_del(&mtty_dev.vd_cdev); - unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK); + unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1); all_done: return ret; @@ -1501,7 +1502,7 @@ static void __exit mtty_dev_exit(void) device_unregister(&mtty_dev.dev); idr_destroy(&mtty_dev.vd_idr); cdev_del(&mtty_dev.vd_cdev); - unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK); + unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1); class_destroy(mtty_dev.vd_class); mtty_dev.vd_class = NULL; pr_info("mtty_dev: Unloaded!\n"); |