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2018-03-30bpf: sockmap, more BPF_SK_SKB_STREAM_VERDICT testsJohn Fastabend3-4/+60
Add BPF_SK_SKB_STREAM_VERDICT tests for ingress hook. While we do this also bring stream tests in-line with MSG based testing. A map for skb options is added for userland to push options at BPF programs. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-30bpf: sockmap, add BPF_F_INGRESS testsJohn Fastabend3-11/+87
Add a set of tests to verify ingress flag in redirect helpers works correctly with various msg sizes. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-28samples/bpf: raw tracepoint testAlexei Starovoitov4-0/+44
add empty raw_tracepoint bpf program to test overhead similar to kprobe and traditional tracepoint tests Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-28samples/bpf: fix spelling mistake: "revieve" -> "receive"Colin Ian King1-1/+1
Trivial fix to spelling mistake in error message text Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap test scriptJohn Fastabend1-0/+450
This adds the test script I am currently using to validate the latest sockmap changes. Shortly sockmap will be ported to selftests and these will be run from the infrastructure there. Until then add the script here so we have a coverage checklist when porting into selftests. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap sample test for bpf_msg_pull_dataJohn Fastabend2-14/+97
This adds an option to test the msg_pull_data helper. This uses two options txmsg_start and txmsg_end to let the user specify start and end bytes to pull. The options can be used with txmsg_apply, txmsg_cork options as well as with any of the basic tests, txmsg, txmsg_redir and txmsg_drop (plus noisy variants) to run pull_data inline with those tests. By giving user direct control over the variables we can easily do negative testing as well as positive tests. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap add SK_DROP testsJohn Fastabend2-16/+61
Add tests for SK_DROP. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap sample support for bpf_msg_cork_bytes()John Fastabend2-8/+64
Add sample application support for the bpf_msg_cork_bytes helper. This lets the user specify how many bytes each verdict should apply to. Similar to apply_bytes() tests these can be run as a stand-alone test when used without other options or inline with other tests by using the txmsg_cork option along with any of the basic tests txmsg, txmsg_redir, txmsg_drop. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap, add sample option to test apply_bytes helperJohn Fastabend2-7/+66
This adds an option to test the apply_bytes helper. This option lets the user specify an int on the command line specifying how much data each verdict should apply to. When this is set a map entry is set with the bytes input by the user and then the specified program --txmsg or --txmsg_redir will use the value and set the applied data. If no other option is set then a default --txmsg_apply program is run. This program will drop pkts if an error is detected on the bytes map lookup. Useful to verify the map lookup and apply helper are working and causing a hard error if it is not. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap sample, add data verification optionJohn Fastabend1-34/+84
To verify data is not being dropped or corrupted this adds an option to verify test-patterns on recv. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap sample, add sendfile testJohn Fastabend1-10/+60
To exercise TX ULP sendpage implementation we need a test that does a sendfile. Add sendfile test option here. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-19bpf: sockmap sample, add option to attach SK_MSG programJohn Fastabend3-8/+119
Add sockmap option to use SK_MSG program types. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-08samples/bpf: add example to test reading addressTeng Qin2-0/+19
This commit adds additional test in the trace_event example, by attaching the bpf program to MEM_UOPS_RETIRED.LOCK_LOADS event with PERF_SAMPLE_ADDR requested, and print the lock address value read from the bpf program to trace_pipe. Signed-off-by: Teng Qin <qinteng@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-9/+1
All of the conflicts were cases of overlapping changes. In net/core/devlink.c, we have to make care that the resouce size_params have become a struct member rather than a pointer to such an object. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-04samples/bpf: add gre sequence number test.William Tu2-4/+7
The patch adds tests for GRE sequence number support for metadata mode tunnel. Signed-off-by: William Tu <u9012063@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-02samples/bpf: detach prog from cgroupPrashant Bhole2-0/+4
test_cgrp2_sock.sh and test_cgrp2_sock2.sh tests keep the program attached to cgroup even after completion. Using detach functionality of test_cgrp2_sock in both scripts. Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Acked-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-02-27Merge tag 'seccomp-v4.16-rc4' of ↵James Morris1-9/+1
https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into fixes-v4.16-rc4 - do not build samples when cross compiling (Michal Hocko) From Kees: "This disables the seccomp samples when cross compiling. We're seen too many build issues here, so it's best to just disable it, especially since they're just the samples."
2018-02-26samples/bpf: Add program for CPU state statisticsLeo Yan3-0/+504
CPU is active when have running tasks on it and CPUFreq governor can select different operating points (OPP) according to different workload; we use 'pstate' to present CPU state which have running tasks with one specific OPP. On the other hand, CPU is idle which only idle task on it, CPUIdle governor can select one specific idle state to power off hardware logics; we use 'cstate' to present CPU idle state. Based on trace events 'cpu_idle' and 'cpu_frequency' we can accomplish the duration statistics for every state. Every time when CPU enters into or exits from idle states, the trace event 'cpu_idle' is recorded; trace event 'cpu_frequency' records the event for CPU OPP changing, so it's easily to know how long time the CPU stays in the specified OPP, and the CPU must be not in any idle state. This patch is to utilize the mentioned trace events for pstate and cstate statistics. To achieve more accurate profiling data, the program uses below sequence to insure CPU running/idle time aren't missed: - Before profiling the user space program wakes up all CPUs for once, so can avoid to missing account time for CPU staying in idle state for long time; the program forces to set 'scaling_max_freq' to lowest frequency and then restore 'scaling_max_freq' to highest frequency, this can ensure the frequency to be set to lowest frequency and later after start to run workload the frequency can be easily to be changed to higher frequency; - User space program reads map data and update statistics for every 5s, so this is same with other sample bpf programs for avoiding big overload introduced by bpf program self; - When send signal to terminate program, the signal handler wakes up all CPUs, set lowest frequency and restore highest frequency to 'scaling_max_freq'; this is exactly same with the first step so avoid to missing account CPU pstate and cstate time during last stage. Finally it reports the latest statistics. The program has been tested on Hikey board with octa CA53 CPUs, below is one example for statistics result, the format mainly follows up Jesper Dangaard Brouer suggestion. Jesper reminds to 'get printf to pretty print with thousands separators use %' and setlocale(LC_NUMERIC, "en_US")', tried three different arm64 GCC toolchains (5.4.0 20160609, 6.2.1 20161016, 6.3.0 20170516) but all of them cannot support printf flag character %' on arm64 platform, so go back print number without grouping mode. CPU states statistics: state(ms) cstate-0 cstate-1 cstate-2 pstate-0 pstate-1 pstate-2 pstate-3 pstate-4 CPU-0 767 6111 111863 561 31 756 853 190 CPU-1 241 10606 107956 484 125 646 990 85 CPU-2 413 19721 98735 636 84 696 757 89 CPU-3 84 11711 79989 17516 909 4811 5773 341 CPU-4 152 19610 98229 444 53 649 708 1283 CPU-5 185 8781 108697 666 91 671 677 1365 CPU-6 157 21964 95825 581 67 566 684 1284 CPU-7 125 15238 102704 398 20 665 786 1197 Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-02-22samples/seccomp: do not compile when cross compiledMichal Hocko1-9/+1
samples/seccomp relies on the host setting which is not suitable for crosscompilation and it actually fails when crosscompiling s390 and powerpc all{yes,mod}config on x86_64 with samples/seccomp/bpf-helper.h:135:2: error: #error __BITS_PER_LONG value unusable. #error __BITS_PER_LONG value unusable. ^ In file included from samples/seccomp/bpf-fancy.c:13:0: samples/seccomp/bpf-fancy.c: In function ‘main’: samples/seccomp/bpf-fancy.c:38:11: error: ‘__NR_exit’ undeclared (first use in this function) SYSCALL(__NR_exit, ALLOW), and many others. I am doing these for compile testing and it's been quite useful to catch issues. Crosscompiling sample code on the other hand doesn't seem all that important so it seems like the easiest way to simply disable samples/seccomp when crosscompiling. Fixing this properly is not that easy as Kees explains: : IIRC, one of the problems is with build ordering problems: the kernel : headers used by the samples aren't available when cross compiling. Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2018-02-13bpf: samples/sockmap detach sock ops programPrashant Bhole1-0/+1
samples/sockops program keeps the sock_ops program attached to cgroup. Fixed this by detaching program before exit. Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-02-13bpf: samples/sockmap fix Makefile for build errorPrashant Bhole1-1/+1
While building samples/sockmap, undefined reference error is thrown for `nla_dump_errormsg'. Linking tools/lib/bpf/nlattr.o as a fix Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-02-13samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp_redirectTushar Dave1-0/+7
Default rlimit RLIMIT_MEMLOCK is 64KB, causes bpf map failure. e.g. [root@labbpf]# ./xdp_redirect $(</sys/class/net/eth2/ifindex) \ > $(</sys/class/net/eth3/ifindex) failed to create a map: 1 Operation not permitted The failure is seen when executing xdp_redirect while xdp_monitor is already runnig. Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-02-06sample/bpf: fix erspan metadataWilliam Tu2-27/+18
The commit c69de58ba84f ("net: erspan: use bitfield instead of mask and offset") changes the erspan header to use bitfield, and commit d350a823020e ("net: erspan: create erspan metadata uapi header") creates a uapi header file. The above two commit breaks the current erspan test. This patch fixes it by adapting the above two changes. Fixes: ac80c2a165af ("samples/bpf: add erspan v2 sample code") Fixes: ef88f89c830f ("samples/bpf: extend test_tunnel_bpf.sh with ERSPAN") Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller10-127/+25
Alexei Starovoitov says: ==================== pull-request: bpf 2018-02-02 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) support XDP attach in libbpf, from Eric. 2) minor fixes, from Daniel, Jakub, Yonghong, Alexei. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-02samples/bpf: use bpf_set_link_xdp_fdEric Leblond9-126/+24
Use bpf_set_link_xdp_fd instead of set_link_xdp_fd to remove some code duplication and benefit of netlink ext ack errors message. Signed-off-by: Eric Leblond <eric@regit.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-02-02libbpf: add error reporting in XDPEric Leblond1-1/+1
Parse netlink ext attribute to get the error message returned by the card. Code is partially take from libnl. We add netlink.h to the uapi include of tools. And we need to avoid include of userspace netlink header to have a successful build of sample so nlattr.h has a define to avoid the inclusion. Using a direct define could have been an issue as NLMSGERR_ATTR_MAX can change in the future. We also define SOL_NETLINK if not defined to avoid to have to copy socket.h for a fixed value. Signed-off-by: Eric Leblond <eric@regit.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-02-01Merge tag 'driver-core-4.16-rc1' of ↵Linus Torvalds2-6/+2
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg KH: "Here is the set of "big" driver core patches for 4.16-rc1. The majority of the work here is in the firmware subsystem, with reworks to try to attempt to make the code easier to handle in the long run, but no functional change. There's also some tree-wide sysfs attribute fixups with lots of acks from the various subsystem maintainers, as well as a handful of other normal fixes and changes. And finally, some license cleanups for the driver core and sysfs code. All have been in linux-next for a while with no reported issues" * tag 'driver-core-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (48 commits) device property: Define type of PROPERTY_ENRTY_*() macros device property: Reuse property_entry_free_data() device property: Move property_entry_free_data() upper firmware: Fix up docs referring to FIRMWARE_IN_KERNEL firmware: Drop FIRMWARE_IN_KERNEL Kconfig option USB: serial: keyspan: Drop firmware Kconfig options sysfs: remove DEBUG defines sysfs: use SPDX identifiers drivers: base: add coredump driver ops sysfs: add attribute specification for /sysfs/devices/.../coredump test_firmware: fix missing unlock on error in config_num_requests_store() test_firmware: make local symbol test_fw_config static sysfs: turn WARN() into pr_warn() firmware: Fix a typo in fallback-mechanisms.rst treewide: Use DEVICE_ATTR_WO treewide: Use DEVICE_ATTR_RO treewide: Use DEVICE_ATTR_RW sysfs.h: Use octal permissions component: add debugfs support bus: simple-pm-bus: convert bool SIMPLE_PM_BUS to tristate ...
2018-01-31Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds14-142/+2121
Pull networking updates from David Miller: 1) Significantly shrink the core networking routing structures. Result of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf 2) Add netdevsim driver for testing various offloads, from Jakub Kicinski. 3) Support cross-chip FDB operations in DSA, from Vivien Didelot. 4) Add a 2nd listener hash table for TCP, similar to what was done for UDP. From Martin KaFai Lau. 5) Add eBPF based queue selection to tun, from Jason Wang. 6) Lockless qdisc support, from John Fastabend. 7) SCTP stream interleave support, from Xin Long. 8) Smoother TCP receive autotuning, from Eric Dumazet. 9) Lots of erspan tunneling enhancements, from William Tu. 10) Add true function call support to BPF, from Alexei Starovoitov. 11) Add explicit support for GRO HW offloading, from Michael Chan. 12) Support extack generation in more netlink subsystems. From Alexander Aring, Quentin Monnet, and Jakub Kicinski. 13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From Russell King. 14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso. 15) Many improvements and simplifications to the NFP driver bpf JIT, from Jakub Kicinski. 16) Support for ipv6 non-equal cost multipath routing, from Ido Schimmel. 17) Add resource abstration to devlink, from Arkadi Sharshevsky. 18) Packet scheduler classifier shared filter block support, from Jiri Pirko. 19) Avoid locking in act_csum, from Davide Caratti. 20) devinet_ioctl() simplifications from Al viro. 21) More TCP bpf improvements from Lawrence Brakmo. 22) Add support for onlink ipv6 route flag, similar to ipv4, from David Ahern. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits) tls: Add support for encryption using async offload accelerator ip6mr: fix stale iterator net/sched: kconfig: Remove blank help texts openvswitch: meter: Use 64-bit arithmetic instead of 32-bit tcp_nv: fix potential integer overflow in tcpnv_acked r8169: fix RTL8168EP take too long to complete driver initialization. qmi_wwan: Add support for Quectel EP06 rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK ipmr: Fix ptrdiff_t print formatting ibmvnic: Wait for device response when changing MAC qlcnic: fix deadlock bug tcp: release sk_frag.page in tcp_disconnect ipv4: Get the address of interface correctly. net_sched: gen_estimator: fix lockdep splat net: macb: Handle HRESP error net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring ipv6: addrconf: break critical section in addrconf_verify_rtnl() ipv6: change route cache aging logic i40e/i40evf: Update DESC_NEEDED value to reflect larger value bnxt_en: cleanup DIM work on device shutdown ...
2018-01-31Merge branch 'for-linus' of ↵Linus Torvalds4-60/+0
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching Pull livepatching updates from Jiri Kosina: - handle 'infinitely'-long sleeping tasks, from Miroslav Benes - remove 'immediate' feature, as it turns out it doesn't provide the originally expected semantics, and brings more issues than value * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching: livepatch: add locking to force and signal functions livepatch: Remove immediate feature livepatch: force transition to finish livepatch: send a fake signal to all blocking tasks
2018-01-26samples/bpf: Partially fixes the bpf.o buildMickaël Salaün1-1/+4
Do not build lib/bpf/bpf.o with this Makefile but use the one from the library directory. This avoid making a buggy bpf.o file (e.g. missing symbols). This patch is useful if some code (e.g. Landlock tests) needs both the bpf.o (from tools/lib/bpf) and the bpf_load.o (from samples/bpf). Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: sockmap set rlimitJohn Fastabend1-0/+7
Avoid extra step of setting limit from cmdline and do it directly in the program. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: sockmap put client sockets in blocking modeJohn Fastabend1-1/+1
Put client sockets in blocking mode otherwise with sendmsg tests its easy to overrun the socket buffers which results in the test being aborted. The original non-blocking was added to handle listen/accept with a single thread the client/accepted sockets do not need to be non-blocking. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: sockmap sample add base test without any BPF for comparisonJohn Fastabend1-5/+21
Add a base test that does not use BPF hooks to test baseline case. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: sockmap sample, report bytes/secJohn Fastabend1-5/+42
Report bytes/sec sent as well as total bytes. Useful to get rough idea how different configurations and usage patterns perform with sockmap. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: sockmap sample, use fork() for send and recvJohn Fastabend1-16/+39
Currently for SENDMSG tests first send completes then recv runs. This does not work well for large data sizes and/or many iterations. So fork the recv and send handler so that we run both send and recv. In the future we can add a parameter to do more than a single fork of tx/rx. With this we can get many GBps of data which helps exercise the sockmap code. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: add sendmsg option for testing BPF programsJohn Fastabend1-3/+145
When testing BPF programs using sockmap I often want to have more control over how sendmsg is exercised. This becomes even more useful as new sockmap program types are added. This adds a test type option to select type of test to run. Currently, only "ping" and "sendmsg" are supported, but more can be added as needed. The new help argument gives the following, Usage: ./sockmap --cgroup <cgroup_path> options: --help -h --cgroup -c --rate -r --verbose -v --iov_count -i --length -l --test -t Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-24bpf: refactor sockmap sample program update for arg parsingJohn Fastabend1-51/+114
sockmap sample program takes arguments from cmd line but it reads them in using offsets into the array. Because we want to add more arguments in the future lets do proper argument handling. Also refactor code to pull apart sock init and ping/pong test. This allows us to add new tests in the future. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-20samples/bpf: xdp_monitor include cpumap tracepoints in monitoringJesper Dangaard Brouer2-67/+443
The xdp_redirect_cpu sample have some "builtin" monitoring of the tracepoints for xdp_cpumap_*, but it is practical to have an external tool that can monitor these transpoint as an easy way to troubleshoot an application using XDP + cpumap. Specifically I need such external tool when working on Suricata and XDP cpumap redirect. Extend the xdp_monitor tool sample with monitoring of these xdp_cpumap_* tracepoints. Model the output format like xdp_redirect_cpu. Given I needed to handle per CPU decoding for cpumap, this patch also add per CPU info on the existing monitor events. This resembles part of the builtin monitoring output from sample xdp_rxq_info. Thus, also covering part of that sample in an external monitoring tool. Performance wise, the cpumap tracepoints uses bulking, which cause them to have very little overhead. Thus, they are enabled by default. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-18samples/bpf: xdp2skb_meta comment explain why pkt-data pointers are invalidatedJesper Dangaard Brouer1-3/+5
Improve the 'unknown reason' comment, with an actual explaination of why the ctx pkt-data pointers need to be loaded after the helper function bpf_xdp_adjust_meta(). Based on the explaination Daniel gave. Fixes: 36e04a2d78d9 ("samples/bpf: xdp2skb_meta shows transferring info from XDP to SKB") Reported-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-17samples/bpf: Fix trailing semicolonLuis de Bethencourt1-1/+1
The trailing semicolon is an empty statement that does no operation. Removing it since it doesn't do anything. Signed-off-by: Luis de Bethencourt <luisbg@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-11livepatch: Remove immediate featureMiroslav Benes4-60/+0
Immediate flag has been used to disable per-task consistency and patch all tasks immediately. It could be useful if the patch doesn't change any function or data semantics. However, it causes problems on its own. The consistency problem is currently broken with respect to immediate patches. func a patches 1i 2i 3 When the patch 3 is applied, only 2i function is checked (by stack checking facility). There might be a task sleeping in 1i though. Such task is migrated to 3, because we do not check 1i in klp_check_stack_func() at all. Coming atomic replace feature would be easier to implement and more reliable without immediate. Thus, remove immediate feature completely and save us from the problems. Note that force feature has the similar problem. However it is considered as a last resort. If used, administrator should not apply any new live patches and should plan for reboot into an updated kernel. The architectures would now need to provide HAVE_RELIABLE_STACKTRACE to fully support livepatch. Signed-off-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2018-01-11samples/bpf: xdp2skb_meta shows transferring info from XDP to SKBJesper Dangaard Brouer3-0/+324
Creating a bpf sample that shows howto use the XDP 'data_meta' infrastructure, created by Daniel Borkmann. Very few drivers support this feature, but I wanted a functional sample to begin with, when working on adding driver support. XDP data_meta is about creating a communication channel between BPF programs. This can be XDP tail-progs, but also other SKB based BPF hooks, like in this case the TC clsact hook. In this sample I show that XDP can store info named "mark", and TC/clsact chooses to use this info and store it into the skb->mark. It is a bit annoying that XDP and TC samples uses different tools/libs when attaching their BPF hooks. As the XDP and TC programs need to cooperate and agree on a struct-layout, it is best/easiest if the two programs can be contained within the same BPF restricted-C file. As the bpf-loader, I choose to not use bpf_load.c (or libbpf), but instead wrote a bash shell scripted named xdp2skb_meta.sh, which demonstrate howto use the iproute cmdline tools 'tc' and 'ip' for loading BPF programs. To make it easy for first time users, the shell script have command line parsing, and support --verbose and --dry-run mode, if you just want to see/learn the tc+ip command syntax: # ./xdp2skb_meta.sh --dev ixgbe2 --dry-run # Dry-run mode: enable VERBOSE and don't call TC+IP tc qdisc del dev ixgbe2 clsact tc qdisc add dev ixgbe2 clsact tc filter add dev ixgbe2 ingress prio 1 handle 1 bpf da obj ./xdp2skb_meta_kern.o sec tc_mark # Flush XDP on device: ixgbe2 ip link set dev ixgbe2 xdp off ip link set dev ixgbe2 xdp obj ./xdp2skb_meta_kern.o sec xdp_mark Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-05samples/bpf: program demonstrating access to xdp_rxq_infoJesper Dangaard Brouer3-0/+631
This sample program can be used for monitoring and reporting how many packets per sec (pps) are received per NIC RX queue index and which CPU processed the packet. In itself it is a useful tool for quickly identifying RSS imbalance issues, see below. The default XDP action is XDP_PASS in-order to provide a monitor mode. For benchmarking purposes it is possible to specify other XDP actions on the cmdline --action. Output below shows an imbalance RSS case where most RXQ's deliver to CPU-0 while CPU-2 only get packets from a single RXQ. Looking at things from a CPU level the two CPUs are processing approx the same amount, BUT looking at the rx_queue_index levels it is clear that RXQ-2 receive much better service, than other RXQs which all share CPU-0. Running XDP on dev:i40e1 (ifindex:3) action:XDP_PASS XDP stats CPU pps issue-pps XDP-RX CPU 0 900,473 0 XDP-RX CPU 2 906,921 0 XDP-RX CPU total 1,807,395 RXQ stats RXQ:CPU pps issue-pps rx_queue_index 0:0 180,098 0 rx_queue_index 0:sum 180,098 rx_queue_index 1:0 180,098 0 rx_queue_index 1:sum 180,098 rx_queue_index 2:2 906,921 0 rx_queue_index 2:sum 906,921 rx_queue_index 3:0 180,098 0 rx_queue_index 3:sum 180,098 rx_queue_index 4:0 180,082 0 rx_queue_index 4:sum 180,082 rx_queue_index 5:0 180,093 0 rx_queue_index 5:sum 180,093 Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2017-12-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller4-0/+63
Daniel Borkmann says: ==================== pull-request: bpf-next 2017-12-18 The following pull-request contains BPF updates for your *net-next* tree. The main changes are: 1) Allow arbitrary function calls from one BPF function to another BPF function. As of today when writing BPF programs, __always_inline had to be used in the BPF C programs for all functions, unnecessarily causing LLVM to inflate code size. Handle this more naturally with support for BPF to BPF calls such that this __always_inline restriction can be overcome. As a result, it allows for better optimized code and finally enables to introduce core BPF libraries in the future that can be reused out of different projects. x86 and arm64 JIT support was added as well, from Alexei. 2) Add infrastructure for tagging functions as error injectable and allow for BPF to return arbitrary error values when BPF is attached via kprobes on those. This way of injecting errors generically eases testing and debugging without having to recompile or restart the kernel. Tags for opting-in for this facility are added with BPF_ALLOW_ERROR_INJECTION(), from Josef. 3) For BPF offload via nfp JIT, add support for bpf_xdp_adjust_head() helper call for XDP programs. First part of this work adds handling of BPF capabilities included in the firmware, and the later patches add support to the nfp verifier part and JIT as well as some small optimizations, from Jakub. 4) The bpftool now also gets support for basic cgroup BPF operations such as attaching, detaching and listing current BPF programs. As a requirement for the attach part, bpftool can now also load object files through 'bpftool prog load'. This reuses libbpf which we have in the kernel tree as well. bpftool-cgroup man page is added along with it, from Roman. 5) Back then commit e87c6bc3852b ("bpf: permit multiple bpf attachments for a single perf event") added support for attaching multiple BPF programs to a single perf event. Given they are configured through perf's ioctl() interface, the interface has been extended with a PERF_EVENT_IOC_QUERY_BPF command in this work in order to return an array of one or multiple BPF prog ids that are currently attached, from Yonghong. 6) Various minor fixes and cleanups to the bpftool's Makefile as well as a new 'uninstall' and 'doc-uninstall' target for removing bpftool itself or prior installed documentation related to it, from Quentin. 7) Add CONFIG_CGROUP_BPF=y to the BPF kernel selftest config file which is required for the test_dev_cgroup test case to run, from Naresh. 8) Fix reporting of XDP prog_flags for nfp driver, from Jakub. 9) Fix libbpf's exit code from the Makefile when libelf was not found in the system, also from Jakub. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-15samples/bpf: add erspan v2 sample codeWilliam Tu2-19/+96
Extend the existing tests for ipv4 ipv6 erspan version 2. Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-12samples/bpf: add a test for bpf_override_returnJosef Bacik4-0/+63
This adds a basic test for bpf_override_return to verify it works. We override the main function for mounting a btrfs fs so it'll return -ENOMEM and then make sure that trying to mount a btrfs fs will fail. Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2017-12-11Merge 4.15-rc3 into driver-core-nextGreg Kroah-Hartman1-2/+12
We want the fixes and changes in here for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-07kobject: Remove redundant license textGreg Kroah-Hartman2-6/+0
Now that the SPDX tag is in all kobject files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-07kobject: add SPDX identifiers to all kobject filesGreg Kroah-Hartman2-0/+2
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the kobject files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-06samples/bpf: add ip6erspan sample codeWilliam Tu2-0/+95
Extend the existing tests for ip6erspan. Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>