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2019-10-13samples/bpf: Use own flags but not HOSTCFLAGSIvan Khoronzhuk1-2/+4
While compiling natively, the host's cflags and ldflags are equal to ones used from HOSTCFLAGS and HOSTLDFLAGS. When cross compiling it should have own, used for target arch. While verification, for arm, arm64 and x86_64 the following flags were used always: -Wall -O2 -fomit-frame-pointer -Wmissing-prototypes -Wstrict-prototypes So, add them as they were verified and used before adding Makefile.target and lets omit "-fomit-frame-pointer" as were proposed while review, as no sense in such optimization for samples. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-10-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Base target programs rules on Makefile.targetIvan Khoronzhuk1-66/+69
The main reason for that - HOSTCC and CC have different aims. HOSTCC is used to build programs running on host, that can cross-comple target programs with CC. It was tested for arm and arm64 cross compilation, based on linaro toolchain, but should work for others. So, in order to split cross compilation (CC) with host build (HOSTCC), lets base samples on Makefile.target. It allows to cross-compile samples/bpf programs with CC while auxialry tools running on host built with HOSTCC. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-9-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Drop unnecessarily inclusion for bpf_loadIvan Khoronzhuk1-1/+1
Drop inclusion for bpf_load -I$(objtree)/usr/include as it is included for all objects anyway, with above line: KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-7-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Use __LINUX_ARM_ARCH__ selector for armIvan Khoronzhuk1-0/+8
For arm, -D__LINUX_ARM_ARCH__=X is min version used as instruction set selector and is absolutely required while parsing some parts of headers. It's present in KBUILD_CFLAGS but not in autoconf.h, so let's retrieve it from and add to programs cflags. In another case errors like "SMP is not supported" for armv7 and bunch of other errors are issued resulting to incorrect final object. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191011002808.28206-6-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Use own EXTRA_CFLAGS for clang commandsIvan Khoronzhuk1-4/+5
It can overlap with CFLAGS used for libraries built with gcc if not now then in next patches. Correct it here for simplicity. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-5-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Use --target from cross-compileIvan Khoronzhuk1-1/+1
For cross compiling the target triple can be inherited from cross-compile prefix as it's done in CLANG_FLAGS from kernel makefile. So copy-paste this decision from kernel Makefile. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-4-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Fix cookie_uid_helper_example obj buildIvan Khoronzhuk1-1/+0
Don't list userspace "cookie_uid_helper_example" object in list for bpf objects. 'always' target is used for listing bpf programs, but 'cookie_uid_helper_example.o' is a user space ELF file, and covered by rule `per_socket_stats_example`, so shouldn't be in 'always'. Let us remove `always += cookie_uid_helper_example.o`, which avoids breaking cross compilation due to mismatched includes. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-3-ivan.khoronzhuk@linaro.org
2019-10-13samples/bpf: Fix HDR_PROBE "echo"Ivan Khoronzhuk1-1/+1
echo should be replaced with echo -e to handle '\n' correctly, but instead, replace it with printf as some systems can't handle echo -e. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191011002808.28206-2-ivan.khoronzhuk@linaro.org
2019-10-09libbpf: Move bpf_{helpers, helper_defs, endian, tracing}.h into libbpfAndrii Nakryiko1-1/+1
Move bpf_helpers.h, bpf_tracing.h, and bpf_endian.h into libbpf. Move bpf_helper_defs.h generation into libbpf's Makefile. Ensure all those headers are installed along the other libbpf headers. Also, adjust selftests and samples include path to include libbpf now. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191008175942.1769476-6-andriin@fb.com
2019-07-16samples/bpf: build with -D__TARGET_ARCH_$(SRCARCH)Ilya Leoshkevich1-1/+1
While $ARCH can be relatively flexible (see Makefile and tools/scripts/Makefile.arch), $SRCARCH always corresponds to a directory name under arch/. Therefore, build samples with -D__TARGET_ARCH_$(SRCARCH), since that matches the expectations of bpf_helpers.h. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Acked-by: Vasily Gorbik <gor@linux.ibm.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-03samples/bpf: add sample program that periodically dumps TCP statsStanislav Fomichev1-0/+1
Uses new RTT callback to dump stats every second. $ mkdir -p /tmp/cgroupv2 $ mount -t cgroup2 none /tmp/cgroupv2 $ mkdir -p /tmp/cgroupv2/foo $ echo $$ >> /tmp/cgroupv2/foo/cgroup.procs $ bpftool prog load ./tcp_dumpstats_kern.o /sys/fs/bpf/tcp_prog $ bpftool cgroup attach /tmp/cgroupv2/foo sock_ops pinned /sys/fs/bpf/tcp_prog $ bpftool prog tracelog $ # run neper/netperf/etc Used neper to compare performance with and without this program attached and didn't see any noticeable performance impact. Sample output: <idle>-0 [015] ..s. 2074.128800: 0: dsack_dups=0 delivered=242526 <idle>-0 [015] ..s. 2074.128808: 0: delivered_ce=0 icsk_retransmits=0 <idle>-0 [015] ..s. 2075.130133: 0: dsack_dups=0 delivered=323599 <idle>-0 [015] ..s. 2075.130138: 0: delivered_ce=0 icsk_retransmits=0 <idle>-0 [005] .Ns. 2076.131440: 0: dsack_dups=0 delivered=404648 <idle>-0 [005] .Ns. 2076.131447: 0: delivered_ce=0 icsk_retransmits=0 Cc: Eric Dumazet <edumazet@google.com> Cc: Priyaranjan Jha <priyarjha@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-03bpf: Add support for fq's EDT to HBMbrakmo1-0/+2
Adds support for fq's Earliest Departure Time to HBM (Host Bandwidth Manager). Includes a new BPF program supporting EDT, and also updates corresponding programs. It will drop packets with an EDT of more than 500us in the future unless the packet belongs to a flow with less than 2 packets in flight. This is done so each flow has at least 2 packets in flight, so they will not starve, and also to help prevent delayed ACK timeouts. It will also work with ECN enabled traffic, where the packets will be CE marked if their EDT is more than 50us in the future. The table below shows some performance numbers. The flows are back to back RPCS. One server sending to another, either 2 or 4 flows. One flow is a 10KB RPC, the rest are 1MB RPCs. When there are more than one flow of a given RPC size, the numbers represent averages. The rate limit applies to all flows (they are in the same cgroup). Tests ending with "-edt" ran with the new BPF program supporting EDT. Tests ending with "-hbt" ran on top HBT qdisc with the specified rate (i.e. no HBM). The other tests ran with the HBM BPF program included in the HBM patch-set. EDT has limited value when using DCTCP, but it helps in many cases when using Cubic. It usually achieves larger link utilization and lower 99% latencies for the 1MB RPCs. HBM ends up queueing a lot of packets with its default parameter values, reducing the goodput of the 10KB RPCs and increasing their latency. Also, the RTTs seen by the flows are quite large. Aggr 10K 10K 10K 1MB 1MB 1MB Limit rate drops RTT rate P90 P99 rate P90 P99 Test rate Flows Mbps % us Mbps us us Mbps ms ms -------- ---- ----- ---- ----- --- ---- ---- ---- ---- ---- ---- cubic 1G 2 904 0.02 108 257 511 539 647 13.4 24.5 cubic-edt 1G 2 982 0.01 156 239 656 967 743 14.0 17.2 dctcp 1G 2 977 0.00 105 324 408 744 653 14.5 15.9 dctcp-edt 1G 2 981 0.01 142 321 417 811 660 15.7 17.0 cubic-htb 1G 2 919 0.00 1825 40 2822 4140 879 9.7 9.9 cubic 200M 2 155 0.30 220 81 532 655 74 283 450 cubic-edt 200M 2 188 0.02 222 87 1035 1095 101 84 85 dctcp 200M 2 188 0.03 111 77 912 939 111 76 325 dctcp-edt 200M 2 188 0.03 217 74 1416 1738 114 76 79 cubic-htb 200M 2 188 0.00 5015 8 14ms 15ms 180 48 50 cubic 1G 4 952 0.03 110 165 516 546 262 38 154 cubic-edt 1G 4 973 0.01 190 111 1034 1314 287 65 79 dctcp 1G 4 951 0.00 103 180 617 905 257 37 38 dctcp-edt 1G 4 967 0.00 163 151 732 1126 272 43 55 cubic-htb 1G 4 914 0.00 3249 13 7ms 8ms 300 29 34 cubic 5G 4 4236 0.00 134 305 490 624 1310 10 17 cubic-edt 5G 4 4865 0.00 156 306 425 759 1520 10 16 dctcp 5G 4 4936 0.00 128 485 221 409 1484 7 9 dctcp-edt 5G 4 4924 0.00 148 390 392 623 1508 11 26 v1 -> v2: Incorporated Andrii's suggestions v2 -> v3: Incorporated Yonghong's suggestions v3 -> v4: Removed credit update that is not needed Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-18samples: bpf: remove unnecessary include options in MakefileDaniel T. Lee1-9/+0
Due to recent change of include path at commit b552d33c80a9 ("samples/bpf: fix include path in Makefile"), some of the previous include options became unnecessary. This commit removes duplicated include options in Makefile. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-15samples/bpf: fix include path in MakefilePrashant Bhole1-1/+1
Recent commit included libbpf.h in selftests/bpf/bpf_util.h. Since some samples use bpf_util.h and samples/bpf/Makefile doesn't have libbpf.h path included, build was failing. Let's add the path in samples/bpf/Makefile. Signed-off-by: Prashant Bhole <prashantbhole.linux@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-11samples: bpf: don't run probes at the local make stageJakub Kicinski1-0/+3
Quentin reports that commit 07c3bbdb1a9b ("samples: bpf: print a warning about headers_install") is producing the false positive when make is invoked locally, from the samples/bpf/ directory. When make is run locally it hits the "all" target, which will recursively invoke make through the full build system. Speed up the "local" run which doesn't actually build anything, and avoid false positives by skipping all the probes if not in kbuild environment (cover both the new warning and the BTF probes). Reported-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-06-06samples: bpf: print a warning about headers_installJakub Kicinski1-0/+9
It seems like periodically someone posts patches to "fix" header includes. The issue is that samples expect the include path to have the uAPI headers (from usr/) first, and then tools/ headers, so that locally installed uAPI headers take precedence. This means that if users didn't run headers_install they will see all sort of strange compilation errors, e.g.: HOSTCC samples/bpf/test_lru_dist samples/bpf/test_lru_dist.c:39:8: error: redefinition of ‘struct list_head’ struct list_head { ^~~~~~~~~ In file included from samples/bpf/test_lru_dist.c:9:0: ../tools/include/linux/types.h:69:8: note: originally defined here struct list_head { ^~~~~~~~~ Try to detect this situation, and print a helpful warning. v2: just use HOSTCC (Jiong). Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-05-28selftests/bpf: convert test_cgrp2_attach2 example into kselftestRoman Gushchin1-2/+0
Convert test_cgrp2_attach2 example into a proper test_cgroup_attach kselftest. It's better because we do run kselftest on a constant basis, so there are better chances to spot a potential regression. Also make it slightly less verbose to conform kselftests output style. Output example: $ ./test_cgroup_attach #override:PASS #multi:PASS test_cgroup_attach:PASS Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-03-27BPF: Add sample code for new ib_umad tracepointIra Weiny1-0/+3
Provide a count of class types for a summary of MAD packets. The example shows one way to filter the trace data based on management class. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-03-02bpf: User program for testing HBMbrakmo1-0/+3
The program nrm creates a cgroup and attaches a BPF program to the cgroup for testing HBM (Host Bandwidth Manager) for egress traffic. One still needs to create network traffic. This can be done through netesto, netperf or iperf3. A follow-up patch contains a script to create traffic. 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 /nrm1 This is convenient when testing HBM in more than 1 cgroup -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. Note, this is just a proof of concept. -h Print this info prog BPF program file name. Name defaults to hbm_out_kern.o More information about HBM can be found in the paper "BPF Host Resource Management" presented at the 2018 Linux Plumbers Conference, Networking Track (http://vger.kernel.org/lpc_net2018_talks/LPC%20BPF%20Network%20Resource%20Paper.pdf) Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-03-02bpf: Sample HBM BPF program to limit egress bwbrakmo1-0/+2
A cgroup skb BPF 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, then the packet is ECN ce marked. The current mark threshold is tuned for DCTCP. c) Else, it is dropped if it is a large packet. If the credit is below the drop threshold, the packet is dropped. Note that dropping a packet through the BPF program does not trigger CWR (Congestion Window Reduction) in TCP packets. A future patch will add support for triggering CWR. 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) Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-03-01samples: bpf: use libbpf where easyJakub Kicinski1-3/+3
Some samples don't really need the magic of bpf_load, switch them to libbpf. v2: - specify program types. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-01samples: bpf: remove load_sock_ops in favour of bpftoolJakub Kicinski1-2/+0
bpftool can do all the things load_sock_ops used to do, and more. Point users to bpftool instead of maintaining this sample utility. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-02-26samples/bpf: convert xdpsock to use libbpf for AF_XDP accessMagnus Karlsson1-1/+0
This commit converts the xdpsock sample application to use the AF_XDP functions present in libbpf. This cuts down the size of it by nearly 300 lines of code. The default ring sizes plus the batch size has been increased and the size of the umem area has decreased. This so that the sample application will provide higher throughput. Note also that the shared umem code has been removed from the sample as this is not supported by libbpf at this point in time. Tested-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-02-02samples/bpf: Convert XDP samples to libbpf usageMaciej Fijalkowski1-4/+4
Some of XDP samples that are attaching the bpf program to the interface via libbpf's bpf_set_link_xdp_fd are still using the bpf_load.c for loading and manipulating the ebpf program and maps. Convert them to do this through libbpf usage and remove bpf_load from the picture. While at it remove what looks like debug leftover in xdp_redirect_map_user.c In xdp_redirect_cpu, change the way that the program to be loaded onto interface is chosen - user now needs to pass the program's section name instead of the relative number. In case of typo print out the section names to choose from. Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-01-15samples/bpf: workaround clang asm goto compilation errorsYonghong Song1-0/+1
x86 compilation has required asm goto support since 4.17. Since clang does not support asm goto, at 4.17, Commit b1ae32dbab50 ("x86/cpufeature: Guard asm_volatile_goto usage for BPF compilation") worked around the issue by permitting an alternative implementation without asm goto for clang. At 5.0, more asm goto usages appeared. [yhs@148 x86]$ egrep -r asm_volatile_goto include/asm/cpufeature.h: asm_volatile_goto("1: jmp 6f\n" include/asm/jump_label.h: asm_volatile_goto("1:" include/asm/jump_label.h: asm_volatile_goto("1:" include/asm/rmwcc.h: asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ include/asm/uaccess.h: asm_volatile_goto("\n" \ include/asm/uaccess.h: asm_volatile_goto("\n" \ [yhs@148 x86]$ Compiling samples/bpf directories, most bpf programs failed compilation with error messages like: In file included from /home/yhs/work/bpf-next/samples/bpf/xdp_sample_pkts_kern.c:2: In file included from /home/yhs/work/bpf-next/include/linux/ptrace.h:6: In file included from /home/yhs/work/bpf-next/include/linux/sched.h:15: In file included from /home/yhs/work/bpf-next/include/linux/sem.h:5: In file included from /home/yhs/work/bpf-next/include/uapi/linux/sem.h:5: In file included from /home/yhs/work/bpf-next/include/linux/ipc.h:9: In file included from /home/yhs/work/bpf-next/include/linux/refcount.h:72: /home/yhs/work/bpf-next/arch/x86/include/asm/refcount.h:70:9: error: 'asm goto' constructs are not supported yet return GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl", ^ /home/yhs/work/bpf-next/arch/x86/include/asm/rmwcc.h:67:2: note: expanded from macro 'GEN_BINARY_SUFFIXED_RMWcc' __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc, \ ^ /home/yhs/work/bpf-next/arch/x86/include/asm/rmwcc.h:21:2: note: expanded from macro '__GEN_RMWcc' asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ ^ /home/yhs/work/bpf-next/include/linux/compiler_types.h:188:37: note: expanded from macro 'asm_volatile_goto' #define asm_volatile_goto(x...) asm goto(x) Most implementation does not even provide an alternative implementation. And it is also not practical to make changes for each call site. This patch workarounded the asm goto issue by redefining the macro like below: #define asm_volatile_goto(x...) asm volatile("invalid use of asm_volatile_goto") If asm_volatile_goto is not used by bpf programs, which is typically the case, nothing bad will happen. If asm_volatile_goto is used by bpf programs, which is incorrect, the compiler will issue an error since "invalid use of asm_volatile_goto" is not valid assembly codes. With this patch, all bpf programs under samples/bpf can pass compilation. Note that bpf programs under tools/testing/selftests/bpf/ compiled fine as they do not access kernel internal headers. Fixes: e769742d3584 ("Revert "x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs"") Fixes: 18fe58229d80 ("x86, asm: change the GEN_*_RMWcc() macros to not quote the condition") Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-12-29Merge tag 'kbuild-v4.21' of ↵Linus Torvalds1-3/+1
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: "Kbuild core: - remove unneeded $(call cc-option,...) switches - consolidate Clang compiler flags into CLANG_FLAGS - announce the deprecation of SUBDIRS - fix single target build for external module - simplify the dependencies of 'prepare' stage targets - allow fixdep to directly write to .*.cmd files - simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS - change if_changed_rule to accept multi-line recipe - move .SECONDARY special target to scripts/Kbuild.include - remove redundant 'set -e' - improve parallel execution for CONFIG_HEADERS_CHECK - misc cleanups Treewide fixes and cleanups - set Clang flags correctly for PowerPC boot images - fix UML build error with CONFIG_GCC_PLUGINS - remove unneeded patterns from .gitignore files - refactor firmware/Makefile - remove unneeded rules for *offsets.s - avoid unneeded regeneration of intermediate .s files - clean up ./Kbuild Modpost: - remove unused -M, -K options - fix false positive warnings about section mismatch - use simple devtable lookup instead of linker magic - misc cleanups Coccinelle: - relax boolinit.cocci checks for overall consistency - fix warning messages of boolinit.cocci Other tools: - improve -dirty check of scripts/setlocalversion - add a tool to generate compile_commands.json from .*.cmd files" * tag 'kbuild-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (51 commits) kbuild: remove unused cmd_gentimeconst kbuild: remove $(obj)/ prefixes in ./Kbuild treewide: add intermediate .s files to targets treewide: remove explicit rules for *offsets.s firmware: refactor firmware/Makefile firmware: remove unnecessary patterns from .gitignore scripts: remove unnecessary ihex2fw and check-lc_ctypes from .gitignore um: remove unused filechk_gen_header in Makefile scripts: add a tool to produce a compile_commands.json file kbuild: add -Werror=implicit-int flag unconditionally kbuild: add -Werror=strict-prototypes flag unconditionally kbuild: add -fno-PIE flag unconditionally scripts: coccinelle: Correct warning message scripts: coccinelle: only suggest true/false in files that already use them kbuild: handle part-of-module correctly for *.ll and *.symtypes kbuild: refactor part-of-module kbuild: refactor quiet_modtag kbuild: remove redundant quiet_modtag for $(obj-m) kbuild: refactor Makefile.asm-generic user/Makefile: Fix typo and capitalization in comment section ...
2018-12-23treewide: add intermediate .s files to targetsMasahiro Yamada1-0/+1
Avoid unneeded recreation of these in the incremental build. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-12-23treewide: remove explicit rules for *offsets.sMasahiro Yamada1-3/+0
These explicit rules are unneeded because scripts/Makefile.build provides a pattern rule to create %.s from %.c Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-20tools/bpf: do not use pahole if clang/llvm can generate BTF sectionsYonghong Song1-0/+8
Add additional checks in tools/testing/selftests/bpf and samples/bpf such that if clang/llvm compiler can generate BTF sections, do not use pahole. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-09-01bpf: add TCP_SAVE_SYN/TCP_SAVED_SYN sample programNikita V. Shirokov1-0/+1
Sample program which shows TCP_SAVE_SYN/TCP_SAVED_SYN usage example: bpf program which is doing TOS/TCLASS reflection (server would reply with a same TOS/TCLASS as client). Signed-off-by: Nikita V. Shirokov <tehnerd@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-08-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-3/+22
Pull networking updates from David Miller: "Highlights: - Gustavo A. R. Silva keeps working on the implicit switch fallthru changes. - Support 802.11ax High-Efficiency wireless in cfg80211 et al, From Luca Coelho. - Re-enable ASPM in r8169, from Kai-Heng Feng. - Add virtual XFRM interfaces, which avoids all of the limitations of existing IPSEC tunnels. From Steffen Klassert. - Convert GRO over to use a hash table, so that when we have many flows active we don't traverse a long list during accumluation. - Many new self tests for routing, TC, tunnels, etc. Too many contributors to mention them all, but I'm really happy to keep seeing this stuff. - Hardware timestamping support for dpaa_eth/fsl-fman from Yangbo Lu. - Lots of cleanups and fixes in L2TP code from Guillaume Nault. - Add IPSEC offload support to netdevsim, from Shannon Nelson. - Add support for slotting with non-uniform distribution to netem packet scheduler, from Yousuk Seung. - Add UDP GSO support to mlx5e, from Boris Pismenny. - Support offloading of Team LAG in NFP, from John Hurley. - Allow to configure TX queue selection based upon RX queue, from Amritha Nambiar. - Support ethtool ring size configuration in aquantia, from Anton Mikaev. - Support DSCP and flowlabel per-transport in SCTP, from Xin Long. - Support list based batching and stack traversal of SKBs, this is very exciting work. From Edward Cree. - Busyloop optimizations in vhost_net, from Toshiaki Makita. - Introduce the ETF qdisc, which allows time based transmissions. IGB can offload this in hardware. From Vinicius Costa Gomes. - Add parameter support to devlink, from Moshe Shemesh. - Several multiplication and division optimizations for BPF JIT in nfp driver, from Jiong Wang. - Lots of prepatory work to make more of the packet scheduler layer lockless, when possible, from Vlad Buslov. - Add ACK filter and NAT awareness to sch_cake packet scheduler, from Toke Høiland-Jørgensen. - Support regions and region snapshots in devlink, from Alex Vesker. - Allow to attach XDP programs to both HW and SW at the same time on a given device, with initial support in nfp. From Jakub Kicinski. - Add TLS RX offload and support in mlx5, from Ilya Lesokhin. - Use PHYLIB in r8169 driver, from Heiner Kallweit. - All sorts of changes to support Spectrum 2 in mlxsw driver, from Ido Schimmel. - PTP support in mv88e6xxx DSA driver, from Andrew Lunn. - Make TCP_USER_TIMEOUT socket option more accurate, from Jon Maxwell. - Support for templates in packet scheduler classifier, from Jiri Pirko. - IPV6 support in RDS, from Ka-Cheong Poon. - Native tproxy support in nf_tables, from Máté Eckl. - Maintain IP fragment queue in an rbtree, but optimize properly for in-order frags. From Peter Oskolkov. - Improvde handling of ACKs on hole repairs, from Yuchung Cheng" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1996 commits) bpf: test: fix spelling mistake "REUSEEPORT" -> "REUSEPORT" hv/netvsc: Fix NULL dereference at single queue mode fallback net: filter: mark expected switch fall-through xen-netfront: fix warn message as irq device name has '/' cxgb4: Add new T5 PCI device ids 0x50af and 0x50b0 net: dsa: mv88e6xxx: missing unlock on error path rds: fix building with IPV6=m inet/connection_sock: prefer _THIS_IP_ to current_text_addr net: dsa: mv88e6xxx: bitwise vs logical bug net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd() ieee802154: hwsim: using right kind of iteration net: hns3: Add vlan filter setting by ethtool command -K net: hns3: Set tx ring' tc info when netdev is up net: hns3: Remove tx ring BD len register in hns3_enet net: hns3: Fix desc num set to default when setting channel net: hns3: Fix for phy link issue when using marvell phy driver net: hns3: Fix for information of phydev lost problem when down/up net: hns3: Fix for command format parsing error in hclge_is_all_function_id_zero net: hns3: Add support for serdes loopback selftest bnxt_en: take coredump_record structure off stack ...
2018-07-27samples: bpf: convert xdpsock_user.c to libbpfJakub Kicinski1-1/+1
Convert xdpsock_user.c to use libbpf instead of bpf_load.o. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-07-27samples: bpf: convert xdp_fwd_user.c to libbpfJakub Kicinski1-1/+1
Convert xdp_fwd_user.c to use libbpf instead of bpf_load.o. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-07-27samples/bpf: Add BTF build flags to MakefileTaeung Song1-1/+16
To smoothly test BTF supported binary on samples/bpf, let samples/bpf/Makefile probe llc, pahole and llvm-objcopy for BPF support and use them like tools/testing/selftests/bpf/Makefile changed from the commit c0fa1b6c3efc ("bpf: btf: Add BTF tests"). Signed-off-by: Taeung Song <treeze.taeung@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-07-17kbuild: Rename HOST_LOADLIBES to KBUILD_HOSTLDLIBSLaura Abbott1-6/+6
In preparation for enabling command line LDLIBS, re-name HOST_LOADLIBES to KBUILD_HOSTLDLIBS as the internal use only flags. Also rename existing usage to HOSTLDLIBS for consistency. This should not have any visible effects. Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-07-17kbuild: Rename HOSTCFLAGS to KBUILD_HOSTCFLAGSLaura Abbott1-5/+5
In preparation for enabling command line CFLAGS, re-name HOSTCFLAGS to KBUILD_HOSTCFLAGS as the internal use only flags. This should not have any visible effects. Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-06-27samples/bpf: Add xdp_sample_pkts exampleToke Høiland-Jørgensen1-0/+4
Add an example program showing how to sample packets from XDP using the perf event buffer. The example userspace program just prints the ethernet header for every packet sampled. Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller1-0/+4
Alexei Starovoitov says: ==================== pull-request: bpf-next 2018-05-24 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Björn Töpel cleans up AF_XDP (removes rebind, explicit cache alignment from uapi, etc). 2) David Ahern adds mtu checks to bpf_ipv{4,6}_fib_lookup() helpers. 3) Jesper Dangaard Brouer adds bulking support to ndo_xdp_xmit. 4) Jiong Wang adds support for indirect and arithmetic shifts to NFP 5) Martin KaFai Lau cleans up BTF uapi and makes the btf_header extensible. 6) Mathieu Xhonneux adds an End.BPF action to seg6local with BPF helpers allowing to edit/grow/shrink a SRH and apply on a packet generic SRv6 actions. 7) Sandipan Das adds support for bpf2bpf function calls in ppc64 JIT. 8) Yonghong Song adds BPF_TASK_FD_QUERY command for introspection of tracing events. 9) other misc fixes from Gustavo A. R. Silva, Sirio Balmelli, John Fastabend, and Magnus Karlsson ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-25samples/bpf: add a samples/bpf test for BPF_TASK_FD_QUERYYonghong Song1-0/+4
This is mostly to test kprobe/uprobe which needs kernel headers. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
S390 bpf_jit.S is removed in net-next and had changes in 'net', since that code isn't used any more take the removal. TLS data structures split the TX and RX components in 'net-next', put the new struct members from the bug fix in 'net' into the RX part. The 'net-next' tree had some reworking of how the ERSPAN code works in the GRE tunneling code, overlapping with a one-line headroom calculation fix in 'net'. Overlapping changes in __sock_map_ctx_update_elem(), keep the bits that read the prog members via READ_ONCE() into local variables before using them. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-15samples: bpf: make the build less noisyJakub Kicinski1-1/+2
Building samples with clang ignores the $(Q) setting, always printing full command to the output. Make it less verbose. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-15samples: bpf: move libbpf from object dependencies to libsJakub Kicinski1-94/+51
Make complains that it doesn't know how to make libbpf.a: scripts/Makefile.host:106: target 'samples/bpf/../../tools/lib/bpf/libbpf.a' doesn't match the target pattern Now that we have it as a dependency of the sources simply add libbpf.a to libraries not objects. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-15samples: bpf: fix build after move to compiling full libbpf.aJakub Kicinski1-5/+12
There are many ways users may compile samples, some of them got broken by commit 5f9380572b4b ("samples: bpf: compile and link against full libbpf"). Improve path resolution and make libbpf building a dependency of source files to force its build. Samples should now again build with any of: cd samples/bpf; make make samples/bpf/ make -C samples/bpf cd samples/bpf; make O=builddir make samples/bpf/ O=builddir make -C samples/bpf O=builddir export KBUILD_OUTPUT=builddir make samples/bpf/ make -C samples/bpf Fixes: 5f9380572b4b ("samples: bpf: compile and link against full libbpf") Reported-by: Björn Töpel <bjorn.topel@gmail.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-13x86/cpufeature: Guard asm_volatile_goto usage for BPF compilationAlexei Starovoitov1-1/+1
Workaround for the sake of BPF compilation which utilizes kernel headers, but clang does not support ASM GOTO and fails the build. Fixes: d0266046ad54 ("x86: Remove FAST_FEATURE_TESTS") Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: daniel@iogearbox.net Cc: peterz@infradead.org Cc: netdev@vger.kernel.org Cc: bp@alien8.de Cc: yhs@fb.com Cc: kernel-team@fb.com Cc: torvalds@linux-foundation.org Cc: davem@davemloft.net Link: https://lkml.kernel.org/r/20180513193222.1997938-1-ast@kernel.org
2018-05-11samples: bpf: convert some XDP samples from bpf_load to libbpfJakub Kicinski1-4/+4
Now that we can use full powers of libbpf in BPF samples, we should perhaps make the simplest XDP programs not depend on bpf_load helpers. This way newcomers will be exposed to the recommended library from the start. Use of bpf_prog_load_xattr() will also make it trivial to later on request offload of the programs by simply adding ifindex to the xattr. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-11tools: bpf: move the event reading loop to libbpfJakub Kicinski1-0/+8
There are two copies of event reading loop - in bpftool and trace_helpers "library". Consolidate them and move the code to libbpf. Return codes from trace_helpers are kept, but renamed to include LIBBPF prefix. Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-11samples: bpf: compile and link against full libbpfJakub Kicinski1-7/+14
samples/bpf currently cherry-picks object files from tools/lib/bpf to link against. Just compile the full library and link statically against it. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-11samples/bpf: Add example of ipv4 and ipv6 forwarding in XDPDavid Ahern1-0/+4
Simple example of fast-path forwarding. It has a serious flaw in not verifying the egress device index supports XDP forwarding. If the egress device does not packets are dropped. Take this only as a simple example of fast-path forwarding. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-04samples/bpf: sample application and documentation for AF_XDP socketsMagnus Karlsson1-0/+4
This is a sample application for AF_XDP sockets. The application supports three different modes of operation: rxdrop, txonly and l2fwd. To show-case a simple round-robin load-balancing between a set of sockets in an xskmap, set the RR_LB compile time define option to 1 in "xdpsock.h". v2: The entries variable was calculated twice in {umem,xq}_nb_avail. Co-authored-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-04-29samples/bpf: move common-purpose trace functions to selftestsYonghong Song1-5/+6
There is no functionality change in this patch. The common-purpose trace functions, including perf_event polling and ksym lookup, are moved from trace_output_user.c and bpf_load.c to selftests/bpf/trace_helpers.c so that these function can be reused later in selftests. Acked-by: Alexei Starovoitov <ast@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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