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* samples/bpf: Allow building with custom bpftoolViktor Malik2023-10-261-2/+3
| | | | | | | | | | | | samples/bpf build its own bpftool boostrap to generate vmlinux.h as well as some BPF objects. This is a redundant step if bpftool has been already built, so update samples/bpf/Makefile such that it accepts a path to bpftool passed via the BPFTOOL variable. The approach is practically the same as tools/testing/selftests/bpf/Makefile uses. Signed-off-by: Viktor Malik <vmalik@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/bd746954ac271b02468d8d951ff9f11e655d485b.1698213811.git.vmalik@redhat.com
* samples/bpf: Fix passing LDFLAGS to libbpfViktor Malik2023-10-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | samples/bpf/Makefile passes LDFLAGS=$(TPROGS_LDFLAGS) to libbpf build without surrounding quotes, which may cause compilation errors when passing custom TPROGS_USER_LDFLAGS. For example: $ make -C samples/bpf/ TPROGS_USER_LDFLAGS="-Wl,--as-needed -specs=/usr/lib/gcc/x86_64-redhat-linux/13/libsanitizer.spec" make: Entering directory './samples/bpf' make -C ../../ M=./samples/bpf BPF_SAMPLES_PATH=./samples/bpf make[1]: Entering directory '.' make -C ./samples/bpf/../../tools/lib/bpf RM='rm -rf' EXTRA_CFLAGS="-Wall -O2 -Wmissing-prototypes -Wstrict-prototypes -I./usr/include -I./tools/testing/selftests/bpf/ -I./samples/bpf/libbpf/include -I./tools/include -I./tools/perf -I./tools/lib -DHAVE_ATTR_TEST=0" \ LDFLAGS=-Wl,--as-needed -specs=/usr/lib/gcc/x86_64-redhat-linux/13/libsanitizer.spec srctree=./samples/bpf/../../ \ O= OUTPUT=./samples/bpf/libbpf/ DESTDIR=./samples/bpf/libbpf prefix= \ ./samples/bpf/libbpf/libbpf.a install_headers make: invalid option -- 'c' make: invalid option -- '=' make: invalid option -- '/' make: invalid option -- 'u' make: invalid option -- '/' [...] Fix the error by properly quoting $(TPROGS_LDFLAGS). Suggested-by: Donald Zickus <dzickus@redhat.com> Signed-off-by: Viktor Malik <vmalik@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/c690de6671cc6c983d32a566d33fd7eabd18b526.1698213811.git.vmalik@redhat.com
* samples/bpf: Allow building with custom CFLAGS/LDFLAGSViktor Malik2023-10-261-1/+4
| | | | | | | | | | | | | | | | | | | | | | | Currently, it is not possible to specify custom flags when building samples/bpf. The flags are defined in TPROGS_CFLAGS/TPROGS_LDFLAGS variables, however, when trying to override those from the make command, compilation fails. For example, when trying to build with PIE: $ make -C samples/bpf TPROGS_CFLAGS="-fpie" TPROGS_LDFLAGS="-pie" This is because samples/bpf/Makefile updates these variables, especially appends include paths to TPROGS_CFLAGS and these updates are overridden by setting the variables from the make command. This patch introduces variables TPROGS_USER_CFLAGS/TPROGS_USER_LDFLAGS for this purpose, which can be set from the make command and their values are propagated to TPROGS_CFLAGS/TPROGS_LDFLAGS. Signed-off-by: Viktor Malik <vmalik@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/2d81100b830a71f0e72329cc7781edaefab75f62.1698213811.git.vmalik@redhat.com
* samples/bpf: Add -fsanitize=bounds to userspace programsRuowen Qin2023-09-281-0/+3
| | | | | | | | | | | | | | | | | The sanitizer flag, which is supported by both clang and gcc, would make it easier to debug array index out-of-bounds problems in these programs. Make the Makfile smarter to detect ubsan support from the compiler and add the '-fsanitize=bounds' accordingly. Suggested-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Jinghao Jia <jinghao@linux.ibm.com> Signed-off-by: Jinghao Jia <jinghao7@illinois.edu> Signed-off-by: Ruowen Qin <ruowenq2@illinois.edu> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Tested-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/bpf/20230927045030.224548-2-ruowenq2@illinois.edu
* selftests/bpf: trace_helpers.c: Optimize kallsyms cacheRong Tao2023-09-081-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | Static ksyms often have problems because the number of symbols exceeds the MAX_SYMS limit. Like changing the MAX_SYMS from 300000 to 400000 in commit e76a014334a6("selftests/bpf: Bump and validate MAX_SYMS") solves the problem somewhat, but it's not the perfect way. This commit uses dynamic memory allocation, which completely solves the problem caused by the limitation of the number of kallsyms. At the same time, add APIs: load_kallsyms_local() ksym_search_local() ksym_get_addr_local() free_kallsyms_local() There are used to solve the problem of selftests/bpf updating kallsyms after attach new symbols during testmod testing. Signed-off-by: Rong Tao <rongtao@cestc.cn> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/bpf/tencent_C9BDA68F9221F21BE4081566A55D66A9700A@qq.com
* samples/bpf: Remove the xdp_sample_pkts utilityToke Høiland-Jørgensen2023-08-241-3/+0
| | | | | | | | | | | | | | | | | | | | The functionality of this utility is covered by the xdpdump utility in xdp-tools. There's a slight difference in usage as the xdpdump utility's main focus is to dump packets before or after they are processed by an existing XDP program. However, xdpdump also has the --load-xdp-program switch, which will make it attach its own program if no existing program is loaded. With this, xdp_sample_pkts usage can be converted as: xdp_sample_pkts eth0 --> xdpdump --load-xdp-program eth0 To get roughly equivalent behaviour. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/r/20230824102255.1561885-6-toke@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: Remove the xdp1 and xdp2 utilitiesToke Høiland-Jørgensen2023-08-241-7/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | The functionality of these utilities have been incorporated into the xdp-bench utility in xdp-tools. Equivalent functionality is: xdp1 eth0 --> xdp-bench drop -p parse-ip -l load-bytes eth0 xdp2 eth0 --> xdp-bench drop -p swap-macs eth0 Note that there's a slight difference in behaviour of those examples: the swap-macs operation of xdp-bench doesn't use the bpf_xdp_load_bytes() helper to load the packet data, whereas the xdp2 utility did so unconditionally. For the parse-ip action the use of bpf_xdp_load_bytes() can be selected by the '-l load-bytes' switch, with the difference that the xdp-bench utility will perform two separate calls to the helper, one to load the ethernet header and another to load the IP header; where the xdp1 utility only performed one call always loading 60 bytes of data. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/r/20230824102255.1561885-5-toke@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: Remove the xdp_rxq_info utilityToke Høiland-Jørgensen2023-08-241-3/+0
| | | | | | | | | | | | | | | | | | | The functionality of this utility has been incorporated into the xdp-bench utility in xdp-tools, by way of the --rxq-stats argument to the 'drop', 'pass' and 'tx' commands of xdp-bench. Some examples of how to convert xdp_rxq_info invocations into equivalent xdp-bench commands: xdp_rxq_info -d eth0 --> xdp-bench pass --rxq-stats eth0 xdp_rxq_info -d eth0 -a XDP_DROP -m --> xdp-bench drop --rxq-stats -p swap-macs eth0 Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/r/20230824102255.1561885-4-toke@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: Remove the xdp_redirect* utilitiesToke Høiland-Jørgensen2023-08-241-28/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These utilities have all been ported to xdp-tools as functions of the xdp-bench utility. The four different utilities in samples are incorporated as separate subcommands to xdp-bench, with most of the command line parameters left intact, except that mandatory arguments are always positional in xdp-bench. For full usage details see the --help output of each command, or the xdp-bench man page. Some examples of how to convert usage to xdp-bench are: xdp_redirect eth0 eth1 --> xdp-bench redirect eth0 eth1 xdp_redirect_map eth0 eth1 --> xdp-bench redirect-map eth0 eth1 xdp_redirect_map_multi eth0 eth1 eth2 eth3 --> xdp-bench redirect-multi eth0 eth1 eth2 eth3 xdp_redirect_cpu -d eth0 -c 0 -c 1 --> xdp-bench redirect-cpu -c 0 -c 1 eth0 xdp_redirect_cpu -d eth0 -c 0 -c 1 -r eth1 --> xdp-bench redirect-cpu -c 0 -c 1 eth0 -r redirect -D eth1 Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/r/20230824102255.1561885-3-toke@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: Remove the xdp_monitor utilityToke Høiland-Jørgensen2023-08-241-7/+1
| | | | | | | | | | | This utility has been ported as-is to xdp-tools as 'xdp-monitor'. The only difference in usage between the samples and xdp-tools versions is that the '-v' command line parameter has been changed to '-e' in the xdp-tools version for consistency with the other utilities. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/r/20230824102255.1561885-2-toke@redhat.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: unify bpf program suffix to .bpf with tracing programsDaniel T. Lee2023-08-211-9/+9
| | | | | | | | | | | | Currently, BPF programs typically have a suffix of .bpf.c. However, some programs still utilize a mixture of _kern.c suffix alongside the naming convention. In order to achieve consistency in the naming of these programs, this commit unifies the inconsistency in the naming convention of BPF kernel programs. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230818090119.477441-4-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: fix warning with ignored-attributesDaniel T. Lee2023-08-211-1/+1
| | | | | | | | | | | | | | | | | Currently, compiling the bpf programs will result the warning with the ignored attribute as follows. This commit fixes the warning by adding cf-protection option. In file included from ./arch/x86/include/asm/linkage.h:6: ./arch/x86/include/asm/ibt.h:77:8: warning: 'nocf_check' attribute ignored; use -fcf-protection to enable the attribute [-Wignored-attributes] extern __noendbr u64 ibt_save(bool disable); ^ ./arch/x86/include/asm/ibt.h:32:34: note: expanded from macro '__noendbr' ^ Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230818090119.477441-2-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* bpf: Replace deprecated -target with --target= for ClangFangrui Song2023-06-291-3/+3
| | | | | | | | | | | | | The -target option has been deprecated since clang 3.4 in 2013. Therefore, use the preferred --target=bpf form instead. This also matches how we use --target= in scripts/Makefile.clang. Signed-off-by: Fangrui Song <maskray@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Quentin Monnet <quentin@isovalent.com> Link: https://github.com/llvm/llvm-project/commit/274b6f0c87a6a1798de0a68135afc7f95def6277 Link: https://lore.kernel.org/bpf/20230624001856.1903733-1-maskray@google.com
* samples/bpf: change _kern suffix to .bpf with BPF test programsDaniel T. Lee2023-01-151-7/+7
| | | | | | | | | | This commit changes the _kern suffix to .bpf with the BPF test programs. With this modification, test programs will inherit the benefit of the new CLANG-BPF compile target. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-11-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
* samples/bpf: Change _kern suffix to .bpf with syscall tracing programDaniel T. Lee2022-12-291-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | Currently old compile rule (CLANG-bpf) doesn't contains VMLINUX_H define flag which is essential for the bpf program that includes "vmlinux.h". Also old compile rule doesn't directly specify the compile target as bpf, instead it uses bunch of extra options with clang followed by long chain of commands. (e.g. clang | opt | llvm-dis | llc) In Makefile, there is already new compile rule which is more simple and neat. And it also has -D__VMLINUX_H__ option. By just changing the _kern suffix to .bpf will inherit the benefit of the new CLANG-BPF compile target. Also, this commit adds dummy gnu/stub.h to the samples/bpf directory. As commit 1c2dd16add7e ("selftests/bpf: get rid of -D__x86_64__") noted, compiling with 'clang -target bpf' will raise an error with stubs.h unless workaround (-D__x86_64) is used. This commit solves this problem by adding dummy stub.h to make /usr/include/features.h to follow the expected path as the same way selftests/bpf dealt with. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20221224071527.2292-4-danieltimlee@gmail.com
* samples: bpf: Fix cross-compiling error by using bootstrap bpftoolPu Lehui2022-07-151-6/+4
| | | | | | | | | | | | | Currently, when cross compiling bpf samples, the host side cannot use arch-specific bpftool to generate vmlinux.h or skeleton. Since samples/bpf use bpftool for vmlinux.h, skeleton, and static linking only, we can use lightweight bootstrap version of bpftool to handle these, and it's always host-native. Suggested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Pu Lehui <pulehui@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220714024612.944071-2-pulehui@huawei.com
* bpf, samples: Remove AF_XDP samplesMagnus Karlsson2022-07-051-9/+0
| | | | | | | | | | | | | | | | Remove the AF_XDP samples from samples/bpf/ as they are dependent on the AF_XDP support in libbpf. This support has now been removed in the 1.0 release, so these samples cannot be compiled anymore. Please start to use libxdp instead. It is backwards compatible with the AF_XDP support that was offered in libbpf. New samples can be found in the various xdp-project repositories connected to libxdp and by googling. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Link: https://lore.kernel.org/bpf/20220630093717.8664-1-magnus.karlsson@gmail.com
* samples: bpf: Don't fail for a missing VMLINUX_BTF when VMLINUX_H is providedJerome Marchand2022-05-091-5/+4
| | | | | | | | | | | | | | samples/bpf build currently always fails if it can't generate vmlinux.h from vmlinux, even when vmlinux.h is directly provided by VMLINUX_H variable, which makes VMLINUX_H pointless. Only fails when neither method works. Fixes: 384b6b3bbf0d ("samples: bpf: Add vmlinux.h generation support") Reported-by: CKI Project <cki-project@redhat.com> Reported-by: Veronika Kabatova <vkabatov@redhat.com> Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220507161635.2219052-1-jmarchan@redhat.com
* samples, bpf: Move routes monitor in xdp_router_ipv4 in a dedicated threadLorenzo Bianconi2022-04-081-1/+1
| | | | | | | | | | In order to not miss any netlink message from the kernel, move routes monitor to a dedicated thread. Fixes: 85bf1f51691c ("samples: bpf: Convert xdp_router_ipv4 to XDP samples helper") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/e364b817c69ded73be24b677ab47a157f7c21b64.1649167911.git.lorenzo@kernel.org
* samples: bpf: Fix linking xdp_router_ipv4 after migrationAlexander Lobakin2022-04-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | Users of the xdp_sample_user infra should be explicitly linked with the standard math library (`-lm`). Otherwise, the following happens: /usr/bin/ld: xdp_sample_user.c:(.text+0x59fc): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x5a0d): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x5adc): undefined reference to `floor' /usr/bin/ld: xdp_sample_user.c:(.text+0x5b01): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x5c1e): undefined reference to `floor' /usr/bin/ld: xdp_sample_user.c:(.text+0x5c43): undefined reference to `ceil [...] That happened previously, so there's a block of linkage flags in the Makefile. xdp_router_ipv4 has been transferred to this infra quite recently, but hasn't been added to it. Fix. Fixes: 85bf1f51691c ("samples: bpf: Convert xdp_router_ipv4 to XDP samples helper") Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220404115451.1116478-1-alexandr.lobakin@intel.com
* samples: bpf: Convert xdp_router_ipv4 to XDP samples helperLorenzo Bianconi2022-04-031-3/+6
| | | | | | | | | Rely on the libbpf skeleton facility and other utilities provided by XDP sample helpers in xdp_router_ipv4 sample. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/7f4d98ee2c13c04d5eb924eebf79ced32fee8418.1647414711.git.lorenzo@kernel.org
* samples: bpf: Fix xdp_sample_user.o linking with ClangAlexander Lobakin2021-12-061-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clang (13) doesn't get the jokes about specifying libraries to link in cclags of individual .o objects: clang-13: warning: -lm: 'linker' input unused [-Wunused-command-line-argument] [ ... ] LD samples/bpf/xdp_redirect_cpu LD samples/bpf/xdp_redirect_map_multi LD samples/bpf/xdp_redirect_map LD samples/bpf/xdp_redirect LD samples/bpf/xdp_monitor /usr/bin/ld: samples/bpf/xdp_sample_user.o: in function `sample_summary_print': xdp_sample_user.c:(.text+0x84c): undefined reference to `floor' /usr/bin/ld: xdp_sample_user.c:(.text+0x870): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x8cf): undefined reference to `floor' /usr/bin/ld: xdp_sample_user.c:(.text+0x8f3): undefined reference to `ceil' [ more ] Specify '-lm' as ldflags for all xdp_sample_user.o users in the main Makefile and remove it from ccflags of ^ in Makefile.target -- just like it's done for all other samples. This works with all compilers. Fixes: 6e1051a54e31 ("samples: bpf: Convert xdp_monitor to XDP samples helper") Fixes: b926c55d856c ("samples: bpf: Convert xdp_redirect to XDP samples helper") Fixes: e531a220cc59 ("samples: bpf: Convert xdp_redirect_cpu to XDP samples helper") Fixes: bbe65865aa05 ("samples: bpf: Convert xdp_redirect_map to XDP samples helper") Fixes: 594a116b2aa1 ("samples: bpf: Convert xdp_redirect_map_multi to XDP samples helper") Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/bpf/20211203195004.5803-2-alexandr.lobakin@intel.com
* samples/bpf: Clean up samples/bpf build failesAndrii Nakryiko2021-12-021-1/+12
| | | | | | | | | | | | | | | | | Remove xdp_samples_user.o rule redefinition which generates Makefile warning and instead override TPROGS_CFLAGS. This seems to work fine when building inside selftests/bpf. That was one big head-scratcher before I found that generic Makefile.target hid this surprising specialization for for xdp_samples_user.o. Main change is to use actual locally installed libbpf headers. Also drop printk macro re-definition (not even used!). Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211201232824.3166325-8-andrii@kernel.org
* Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski2021-11-011-12/+35
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Alexei Starovoitov says: ==================== pull-request: bpf-next 2021-11-01 We've added 181 non-merge commits during the last 28 day(s) which contain a total of 280 files changed, 11791 insertions(+), 5879 deletions(-). The main changes are: 1) Fix bpf verifier propagation of 64-bit bounds, from Alexei. 2) Parallelize bpf test_progs, from Yucong and Andrii. 3) Deprecate various libbpf apis including af_xdp, from Andrii, Hengqi, Magnus. 4) Improve bpf selftests on s390, from Ilya. 5) bloomfilter bpf map type, from Joanne. 6) Big improvements to JIT tests especially on Mips, from Johan. 7) Support kernel module function calls from bpf, from Kumar. 8) Support typeless and weak ksym in light skeleton, from Kumar. 9) Disallow unprivileged bpf by default, from Pawan. 10) BTF_KIND_DECL_TAG support, from Yonghong. 11) Various bpftool cleanups, from Quentin. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (181 commits) libbpf: Deprecate AF_XDP support kbuild: Unify options for BTF generation for vmlinux and modules selftests/bpf: Add a testcase for 64-bit bounds propagation issue. bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit. bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off. selftests/bpf: Fix also no-alu32 strobemeta selftest bpf: Add missing map_delete_elem method to bloom filter map selftests/bpf: Add bloom map success test for userspace calls bpf: Add alignment padding for "map_extra" + consolidate holes bpf: Bloom filter map naming fixups selftests/bpf: Add test cases for struct_ops prog bpf: Add dummy BPF STRUCT_OPS for test purpose bpf: Factor out helpers for ctx access checking bpf: Factor out a helper to prepare trampoline for struct_ops prog selftests, bpf: Fix broken riscv build riscv, libbpf: Add RISC-V (RV64) support to bpf_tracing.h tools, build: Add RISC-V to HOSTARCH parsing riscv, bpf: Increase the maximum number of iterations selftests, bpf: Add one test for sockmap with strparser selftests, bpf: Fix test_txmsg_ingress_parser error ... ==================== Link: https://lore.kernel.org/r/20211102013123.9005-1-alexei.starovoitov@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| * samples: bpf: Suppress readelf stderr when probing for BTF supportPu Lehui2021-10-211-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When compiling bpf samples, the following warning appears: readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF sections of machine number 247 readelf: Warning: unable to apply unsupported reloc type 10 to section .debug_info readelf: Warning: unable to apply unsupported reloc type 1 to section .debug_info readelf: Warning: unable to apply unsupported reloc type 10 to section .debug_info Same problem was mentioned in commit 2f0921262ba9 ("selftests/bpf: suppress readelf stderr when probing for BTF support"), let's use readelf that supports btf. Signed-off-by: Pu Lehui <pulehui@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20211021123913.48833-1-pulehui@huawei.com
| * samples/bpf: Do not FORCE-recompile libbpfQuentin Monnet2021-10-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In samples/bpf/Makefile, libbpf has a FORCE dependency that force it to be rebuilt. I read this as a way to keep the library up-to-date, given that we do not have, in samples/bpf, a list of the source files for libbpf itself. However, a better approach would be to use the "$(wildcard ...)" function from make, and to have libbpf depend on all the .c and .h files in its directory. This is what samples/bpf/Makefile does for bpftool, and also what the BPF selftests' Makefile does for libbpf. Let's update the Makefile to avoid rebuilding libbpf all the time (and bpftool on top of it). Signed-off-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211007194438.34443-11-quentin@isovalent.com
| * samples/bpf: Install libbpf headers when buildingQuentin Monnet2021-10-081-10/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | API headers from libbpf should not be accessed directly from the source directory. Instead, they should be exported with "make install_headers". Make sure that samples/bpf/Makefile installs the headers properly when building. The object compiled from and exported by libbpf are now placed into a subdirectory of sample/bpf/ instead of remaining in tools/lib/bpf/. We attempt to remove this directory on "make clean". However, the "clean" target re-enters the samples/bpf/ directory from the root of the repository ("$(MAKE) -C ../../ M=$(CURDIR) clean"), in such a way that $(srctree) and $(src) are not defined, making it impossible to use $(LIBBPF_OUTPUT) and $(LIBBPF_DESTDIR) in the recipe. So we only attempt to clean $(CURDIR)/libbpf, which is the default value. Add a dependency on libbpf's headers for the $(TRACE_HELPERS). We also change the output directory for bpftool, to place the generated objects under samples/bpf/bpftool/ instead of building in bpftool's directory directly. Doing so, we make sure bpftool reuses the libbpf library previously compiled and installed. Signed-off-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211007194438.34443-10-quentin@isovalent.com
| * bpf: Use $(pound) instead of \# in MakefilesQuentin Monnet2021-10-061-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Recent-ish versions of make do no longer consider number signs ("#") as comment symbols when they are inserted inside of a macro reference or in a function invocation. In such cases, the symbols should not be escaped. There are a few occurrences of "\#" in libbpf's and samples' Makefiles. In the former, the backslash is harmless, because grep associates no particular meaning to the escaped symbol and reads it as a regular "#". In samples' Makefile, recent versions of make will pass the backslash down to the compiler, making the probe fail all the time and resulting in the display of a warning about "make headers_install" being required, even after headers have been installed. A similar issue has been addressed at some other locations by commit 9564a8cf422d ("Kbuild: fix # escaping in .cmd files for future Make"). Let's address it for libbpf's and samples' Makefiles in the same fashion, by using a "$(pound)" variable (pulled from tools/scripts/Makefile.include for libbpf, or re-defined for the samples). Reference for the change in make: https://git.savannah.gnu.org/cgit/make.git/commit/?id=c6966b323811c37acedff05b57 Fixes: 2f3830412786 ("libbpf: Make libbpf_version.h non-auto-generated") Fixes: 07c3bbdb1a9b ("samples: bpf: print a warning about headers_install") Signed-off-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211006111049.20708-1-quentin@isovalent.com
* | samples: bpf: Fix vmlinux.h generation for XDP samplesKumar Kartikeya Dwivedi2021-09-281-9/+8
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generate vmlinux.h only from the in-tree vmlinux, and remove enum declarations that would cause a build failure in case of version mismatches. There are now two options when building the samples: 1. Compile the kernel to use in-tree vmlinux for vmlinux.h 2. Override VMLINUX_BTF for samples using something like this: make VMLINUX_BTF=/sys/kernel/btf/vmlinux -C samples/bpf This change was tested with relative builds, e.g. cases like: * make O=build -C samples/bpf * make KBUILD_OUTPUT=build -C samples/bpf * make -C samples/bpf * cd samples/bpf && make When a suitable VMLINUX_BTF is not found, the following message is printed: /home/kkd/src/linux/samples/bpf/Makefile:333: *** Cannot find a vmlinux for VMLINUX_BTF at any of " ./vmlinux", build the kernel or set VMLINUX_BTF variable. Stop. Fixes: 384b6b3bbf0d (samples: bpf: Add vmlinux.h generation support) Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20210928054608.1799021-1-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_map_multi to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+3
| | | | | | | | | | | | | | | Use the libbpf skeleton facility and other utilities provided by XDP samples helper. Also adapt to change of type of mac address map, so that no resizing is required. Add a new flag for sample mask that skips priting the from_device->to_device heading for each line, as xdp_redirect_map_multi may have two devices but the flow of data may be bidirectional, so the output would be confusing. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-23-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_map_multi_kern.o to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-3/+4
| | | | | | | | | | | One of the notable changes is using a BPF_MAP_TYPE_HASH instead of array map to store mac addresses of devices, as the resizing behavior was based on max_ifindex, which unecessarily maximized the capacity of map beyond what was needed. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-22-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_map to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+3
| | | | | | | | | | | | | Use the libbpf skeleton facility and other utilities provided by XDP samples helper. Since get_mac_addr is already provided by XDP samples helper, we drop it. Also convert to XDP samples helper similar to prior samples to minimize duplication of code. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-21-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_map_kern.o to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+4
| | | | | | | | | | Also update it to use consistent SEC("xdp") and SEC("xdp_devmap") naming, and use global variable instead of BPF map for copying the mac address. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-20-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_cpu to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+3
| | | | | | | | | | | | | | | | | | | | | | Use the libbpf skeleton facility and other utilities provided by XDP samples helper. Similar to xdp_monitor, xdp_redirect_cpu was quite featureful except a few minor omissions (e.g. redirect errno reporting). All of these have been moved to XDP samples helper, hence drop the unneeded code and convert to usage of helpers provided by it. One of the important changes here is dropping of mprog-disable option, as we make that the default. Also, we support built-in programs for some common actions on the packet when it reaches kthread (pass, drop, redirect to device). If the user still needs to install a custom program, they can still supply a BPF object, however the program should be suitably tagged with SEC("xdp_cpumap") annotation so that the expected attach type is correct when updating our cpumap map element. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-19-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_cpu_kern.o to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+3
| | | | | | | | | | Similar to xdp_monitor_kern, a lot of these BPF programs have been reimplemented properly consolidating missing features from other XDP samples. Hence, drop the unneeded code and rename to .bpf.c suffix. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-18-memxor@gmail.com
* samples: bpf: Convert xdp_redirect to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+3
| | | | | | | | | | | | | | | Use the libbpf skeleton facility and other utilities provided by XDP samples helper. One important note: The XDP samples helper handles ownership of installed XDP programs on devices, including responding to SIGINT and SIGTERM, so drop the code here and use the helpers we provide going forward for all xdp_redirect* conversions. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-17-memxor@gmail.com
* samples: bpf: Convert xdp_redirect_kern.o to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+3
| | | | | | | | | | We moved swap_src_dst_mac to xdp_sample.bpf.h to be shared with other potential users, so drop it while moving code to the new file. Also, consistently use SEC("xdp") naming instead. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-16-memxor@gmail.com
* samples: bpf: Convert xdp_monitor to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-2/+7
| | | | | | | | | | | | | | | | | Use the libbpf skeleton facility and other utilities provided by XDP samples helper. A lot of the code in xdp_monitor and xdp_redirect_cpu has been moved to the xdp_sample_user.o helper, so we remove the duplicate functions here that are no longer needed. Thanks to BPF skeleton, we no longer depend on order of tracepoints to uninstall them on startup. Instead, the sample mask is used to install the needed tracepoints. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-15-memxor@gmail.com
* samples: bpf: Convert xdp_monitor_kern.o to XDP samples helperKumar Kartikeya Dwivedi2021-08-241-1/+41
| | | | | | | | | | | | | We already moved all the functionality it provided in XDP samples helper userspace and kernel BPF object, so just delete the unneeded code. We also add generation of BPF skeleton and compilation using clang -target bpf for files ending with .bpf.c suffix (to denote that they use vmlinux.h). Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-14-memxor@gmail.com
* samples: bpf: Add vmlinux.h generation supportKumar Kartikeya Dwivedi2021-08-241-0/+25
| | | | | | | | | | Also, take this opportunity to depend on in-tree bpftool, so that we can use static linking support in subsequent commits for XDP samples BPF helper object. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-13-memxor@gmail.com
* bpf, samples: Add -fno-asynchronous-unwind-tables to BPF Clang invocationToke Høiland-Jørgensen2021-07-051-0/+1
| | | | | | | | | | | | | | | | | The samples/bpf Makefile currently compiles BPF files in a way that will produce an .eh_frame section, which will in turn confuse libbpf and produce errors when loading BPF programs, like: libbpf: elf: skipping unrecognized data section(32) .eh_frame libbpf: elf: skipping relo section(33) .rel.eh_frame for section(32) .eh_frame Fix this by instruction Clang not to produce this section, as it's useless for BPF anyway. Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210705103841.180260-1-toke@redhat.com
* sample/bpf: Add xdp_redirect_map_multi for redirect_map broadcast testHangbin Liu2021-05-261-0/+3
| | | | | | | | | | | This is a sample for xdp redirect broadcast. In the sample we could forward all packets between given interfaces. There is also an option -X that could enable 2nd xdp_prog on egress interface. Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20210519090747.1655268-4-liuhangbin@gmail.com
* samples/bpf: Add include dir for MIPS Loongson64 to fix build errorsTiezhu Yang2021-02-021-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There exists many build errors when make M=samples/bpf on the Loongson platform. This issue is MIPS related, x86 compiles just fine. Here are some errors: CLANG-bpf samples/bpf/sockex2_kern.o In file included from samples/bpf/sockex2_kern.c:2: In file included from ./include/uapi/linux/in.h:24: In file included from ./include/linux/socket.h:8: In file included from ./include/linux/uio.h:8: In file included from ./include/linux/kernel.h:11: In file included from ./include/linux/bitops.h:32: In file included from ./arch/mips/include/asm/bitops.h:19: In file included from ./arch/mips/include/asm/barrier.h:11: ./arch/mips/include/asm/addrspace.h:13:10: fatal error: 'spaces.h' file not found ^~~~~~~~~~ 1 error generated. CLANG-bpf samples/bpf/sockex2_kern.o In file included from samples/bpf/sockex2_kern.c:2: In file included from ./include/uapi/linux/in.h:24: In file included from ./include/linux/socket.h:8: In file included from ./include/linux/uio.h:8: In file included from ./include/linux/kernel.h:11: In file included from ./include/linux/bitops.h:32: In file included from ./arch/mips/include/asm/bitops.h:22: In file included from ./arch/mips/include/asm/cpu-features.h:13: In file included from ./arch/mips/include/asm/cpu-info.h:15: In file included from ./include/linux/cache.h:6: ./arch/mips/include/asm/cache.h:12:10: fatal error: 'kmalloc.h' file not found ^~~~~~~~~~~ 1 error generated. CLANG-bpf samples/bpf/sockex2_kern.o In file included from samples/bpf/sockex2_kern.c:2: In file included from ./include/uapi/linux/in.h:24: In file included from ./include/linux/socket.h:8: In file included from ./include/linux/uio.h:8: In file included from ./include/linux/kernel.h:11: In file included from ./include/linux/bitops.h:32: In file included from ./arch/mips/include/asm/bitops.h:22: ./arch/mips/include/asm/cpu-features.h:15:10: fatal error: 'cpu-feature-overrides.h' file not found ^~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. $ find arch/mips/include/asm -name spaces.h | sort arch/mips/include/asm/mach-ar7/spaces.h ... arch/mips/include/asm/mach-generic/spaces.h ... arch/mips/include/asm/mach-loongson64/spaces.h ... arch/mips/include/asm/mach-tx49xx/spaces.h $ find arch/mips/include/asm -name kmalloc.h | sort arch/mips/include/asm/mach-generic/kmalloc.h arch/mips/include/asm/mach-ip32/kmalloc.h arch/mips/include/asm/mach-tx49xx/kmalloc.h $ find arch/mips/include/asm -name cpu-feature-overrides.h | sort arch/mips/include/asm/mach-ath25/cpu-feature-overrides.h ... arch/mips/include/asm/mach-generic/cpu-feature-overrides.h ... arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h ... arch/mips/include/asm/mach-tx49xx/cpu-feature-overrides.h In the arch/mips/Makefile, there exists the following board-dependent options: include arch/mips/Kbuild.platforms cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic So we can do the similar things in samples/bpf/Makefile, just add platform specific and generic include dir for MIPS Loongson64 to fix the build errors. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/1611669925-25315-1-git-send-email-yangtiezhu@loongson.cn
* samples/bpf: Set flag __SANE_USERSPACE_TYPES__ for MIPS to fix build warningsTiezhu Yang2021-01-261-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There exists many build warnings when make M=samples/bpf on the Loongson platform, this issue is MIPS related, x86 compiles just fine. Here are some warnings: CC samples/bpf/ibumad_user.o samples/bpf/ibumad_user.c: In function ‘dump_counts’: samples/bpf/ibumad_user.c:46:24: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=] printf("0x%02x : %llu\n", key, value); ~~~^ ~~~~~ %lu CC samples/bpf/offwaketime_user.o samples/bpf/offwaketime_user.c: In function ‘print_ksym’: samples/bpf/offwaketime_user.c:34:17: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=] printf("%s/%llx;", sym->name, addr); ~~~^ ~~~~ %lx samples/bpf/offwaketime_user.c: In function ‘print_stack’: samples/bpf/offwaketime_user.c:68:17: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=] printf(";%s %lld\n", key->waker, count); ~~~^ ~~~~~ %ld MIPS needs __SANE_USERSPACE_TYPES__ before <linux/types.h> to select 'int-ll64.h' in arch/mips/include/uapi/asm/types.h, then it can avoid build warnings when printing __u64 with %llu, %llx or %lld. The header tools/include/linux/types.h defines __SANE_USERSPACE_TYPES__, it seems that we can include <linux/types.h> in the source files which have build warnings, but it has no effect due to actually it includes usr/include/linux/types.h instead of tools/include/linux/types.h, the problem is that "usr/include" is preferred first than "tools/include" in samples/bpf/Makefile, that sounds like a ugly hack to -Itools/include before -Iusr/include. So define __SANE_USERSPACE_TYPES__ for MIPS in samples/bpf/Makefile is proper, if add "TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__" in samples/bpf/Makefile, it appears the following error: Auto-detecting system features: ... libelf: [ on ] ... zlib: [ on ] ... bpf: [ OFF ] BPF API too old make[3]: *** [Makefile:293: bpfdep] Error 1 make[2]: *** [Makefile:156: all] Error 2 With #ifndef __SANE_USERSPACE_TYPES__ in tools/include/linux/types.h, the above error has gone and this ifndef change does not hurt other compilations. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/1611551146-14052-1-git-send-email-yangtiezhu@loongson.cn
* bpf, docs: Update build procedure for manually compiling LLVM and ClangTiezhu Yang2021-01-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current LLVM and Clang build procedure in samples/bpf/README.rst is out of date. See below that the links are not accessible any more. $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed The LLVM community has adopted new ways to build the compiler. There are different ways to build LLVM and Clang, the Clang Getting Started page [1] has one way. As Yonghong said, it is better to copy the build procedure in Documentation/bpf/bpf_devel_QA.rst to keep consistent. I verified the procedure and it is proved to be feasible, so we should update README.rst to reflect the reality. At the same time, update the related comment in Makefile. Additionally, as Fangrui said, the dir llvm-project/llvm/build/install is not used, BUILD_SHARED_LIBS=OFF is the default option [2], so also change Documentation/bpf/bpf_devel_QA.rst together. At last, we recommend that developers who want the fastest incremental builds use the Ninja build system [1], you can find it in your system's package manager, usually the package is ninja or ninja-build [3], so add ninja to build dependencies suggested by Nathan. [1] https://clang.llvm.org/get_started.html [2] https://www.llvm.org/docs/CMake.html [3] https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Yonghong Song <yhs@fb.com> Cc: Fangrui Song <maskray@google.com> Link: https://lore.kernel.org/bpf/1611279584-26047-1-git-send-email-yangtiezhu@loongson.cn
* samples/bpf: Sample application for eBPF load and socket creation splitMariusz Dudek2020-12-031-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | Introduce a sample program to demonstrate the control and data plane split. For the control plane part a new program called xdpsock_ctrl_proc is introduced. For the data plane part, some code was added to xdpsock_user.c to act as the data plane entity. Application xdpsock_ctrl_proc works as control entity with sudo privileges (CAP_SYS_ADMIN and CAP_NET_ADMIN are sufficient) and the extended xdpsock as data plane entity with CAP_NET_RAW capability only. Usage example: sudo ./samples/bpf/xdpsock_ctrl_proc -i <interface> sudo ./samples/bpf/xdpsock -i <interface> -q <queue_id> -n <interval> -N -l -R Signed-off-by: Mariusz Dudek <mariuszx.dudek@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/bpf/20201203090546.11976-3-mariuszx.dudek@intel.com
* samples: bpf: Remove bpf_load loader completelyDaniel T. Lee2020-11-261-6/+4
| | | | | | | | | | | | | | | | | | | Numerous refactoring that rewrites BPF programs written with bpf_load to use the libbpf loader was finally completed, resulting in BPF programs using bpf_load within the kernel being completely no longer present. This commit removes bpf_load, an outdated bpf loader that is difficult to keep up with the latest kernel BPF and causes confusion. Also, this commit removes the unused trace_helper and bpf_load from samples/bpf target objects from Makefile. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201124090310.24374-8-danieltimlee@gmail.com
* samples: bpf: Refactor test_overhead program with libbpfDaniel T. Lee2020-11-261-1/+1
| | | | | | | | | | | | | | | This commit refactors the existing program with libbpf bpf loader. Since the kprobe, tracepoint and raw_tracepoint bpf program can be attached with single bpf_program__attach() interface, so the corresponding function of libbpf is used here. Rather than specifying the number of cpus inside the code, this commit uses the number of available cpus with _SC_NPROCESSORS_ONLN. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201124090310.24374-6-danieltimlee@gmail.com
* samples: bpf: Refactor ibumad program with libbpfDaniel T. Lee2020-11-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | This commit refactors the existing ibumad program with libbpf bpf loader. Attach/detach of Tracepoint bpf programs has been managed with the generic bpf_program__attach() and bpf_link__destroy() from the libbpf. Also, instead of using the previous BPF MAP definition, this commit refactors ibumad MAP definition with the new BTF-defined MAP format. To verify that this bpf program works without an infiniband device, try loading ib_umad kernel module and test the program as follows: # modprobe ib_umad # ./ibumad Moreover, TRACE_HELPERS has been removed from the Makefile since it is not used on this program. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201124090310.24374-5-danieltimlee@gmail.com
* samples: bpf: Refactor task_fd_query program with libbpfDaniel T. Lee2020-11-261-1/+1
| | | | | | | | | | | | | | | | | | | | | This commit refactors the existing kprobe program with libbpf bpf loader. To attach bpf program, this uses generic bpf_program__attach() approach rather than using bpf_load's load_bpf_file(). To attach bpf to perf_event, instead of using previous ioctl method, this commit uses bpf_program__attach_perf_event since it manages the enable of perf_event and attach of BPF programs to it, which is much more intuitive way to achieve. Also, explicit close(fd) has been removed since event will be closed inside bpf_link__destroy() automatically. Furthermore, to prevent conflict of same named uprobe events, O_TRUNC flag has been used to clear 'uprobe_events' interface. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201124090310.24374-4-danieltimlee@gmail.com
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