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There are two unit test cases, which should encode
TYPEDEF type, but instead encode PTR type.
The error is flagged out after enforcing name
checking in the previous patch.
Fixes: c0fa1b6c3efc ("bpf: btf: Add BTF tests")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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CONFIG_FTRACE_SYSCALLS=y is required for get_cgroup_id_user test case
this test reads a file from debug trace path
/sys/kernel/debug/tracing/events/syscalls/sys_enter_nanosleep/id
Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Similar to msg_pull_data and msg_push_data add a set of options to
have msg_pop_data() exercised.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Add the necessary header definitions to tools for new
msg_pop_data_helper.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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s/btf_get_from_id/btf__get_from_id/ to restore the API naming convention.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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The selftest test_btf is changed to test both jit and non-jit.
The test result should be the same regardless of whether jit
is enabled or not.
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Daniel Borkmann says:
====================
pull-request: bpf-next 2018-11-26
The following pull-request contains BPF updates for your *net-next* tree.
The main changes are:
1) Extend BTF to support function call types and improve the BPF
symbol handling with this info for kallsyms and bpftool program
dump to make debugging easier, from Martin and Yonghong.
2) Optimize LPM lookups by making longest_prefix_match() handle
multiple bytes at a time, from Eric.
3) Adds support for loading and attaching flow dissector BPF progs
from bpftool, from Stanislav.
4) Extend the sk_lookup() helper to be supported from XDP, from Nitin.
5) Enable verifier to support narrow context loads with offset > 0
to adapt to LLVM code generation (currently only offset of 0 was
supported). Add test cases as well, from Andrey.
6) Simplify passing device functions for offloaded BPF progs by
adding callbacks to bpf_prog_offload_ops instead of ndo_bpf.
Also convert nfp and netdevsim to make use of them, from Quentin.
7) Add support for sock_ops based BPF programs to send events to
the perf ring-buffer through perf_event_output helper, from
Sowmini and Daniel.
8) Add read / write support for skb->tstamp from tc BPF and cg BPF
programs to allow for supporting rate-limiting in EDT qdiscs
like fq from BPF side, from Vlad.
9) Extend libbpf API to support map in map types and add test cases
for it as well to BPF kselftests, from Nikita.
10) Account the maximum packet offset accessed by a BPF program in
the verifier and use it for optimizing nfp JIT, from Jiong.
11) Fix error handling regarding kprobe_events in BPF sample loader,
from Daniel T.
12) Add support for queue and stack map type in bpftool, from David.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This could be used to rate limit egress traffic in concert with a qdisc
which supports Earliest Departure Time, such as FQ.
Write access from cg skb progs only with CAP_SYS_ADMIN, since the value
will be used by downstream qdiscs. It might make sense to relax this.
Changes v1 -> v2:
- allow access from cg skb, write only with CAP_SYS_ADMIN
Signed-off-by: Vlad Dumitrescu <vladum@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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The CHECK message contains a spelling mistake, fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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adding test/example of bpf_map__set_inner_map_fd usage
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Change the bpf programs test_btf_haskv.c and test_btf_nokv.c to
have two sections, and enhance test_btf.c test_file feature
to test btf func_info returned by the kernel.
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>
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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>
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A two function bpf program is loaded with btf and func_info.
After successful prog load, the bpf_get_info syscall is called
to retrieve prog info to ensure the types returned from the
kernel matches the types passed to the kernel from the
user space.
Several negative tests are also added to test loading/retriving
of func_type info.
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>
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This patch adds unit tests for BTF_KIND_FUNC_PROTO and
BTF_KIND_FUNC to test_btf.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Check that iterating two separate hash maps produces the same
order of keys if BPF_F_ZERO_SEED is used.
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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When patching in a new sequence for the first insn of a subprog, the start
of that subprog does not change (it's the first insn of the sequence), so
adjust_subprog_starts should check start <= off (rather than < off).
Also added a test to test_verifier.c (it's essentially the syz reproducer).
Fixes: cc8b0b92a169 ("bpf: introduce function calls (function boundaries)")
Reported-by: syzbot+4fc427c7af994b0948be@syzkaller.appspotmail.com
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Use bpf_sk_lookup_tcp, bpf_sk_lookup_udp and bpf_sk_release helpers from
test_sock_addr programs to make sure they're available and can lookup
and release socket properly for IPv4/IPv4, TCP/UDP.
Reading from a few fields of returned struct bpf_sock is also tested.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Daniel Borkmann reports:
test_progs.c: In function ‘main’:
test_progs.c:81:3: warning: ‘duration’ may be used uninitialized in this function [-Wmaybe-uninitialized]
printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
^~~~~~
test_progs.c:1706:8: note: ‘duration’ was declared here
__u32 duration;
^~~~~~~~
Signed-off-by: Joe Stringer <joe@wand.net.nz>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Add more test cases for context bpf_sock_addr to test narrow loads with
offset > 0 for ctx->user_ip4 field (__u32):
* off=1, size=1;
* off=2, size=1;
* off=3, size=1;
* off=2, size=2.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Test the following narrow loads in test_verifier for context __sk_buff:
* off=1, size=1 - ok;
* off=2, size=1 - ok;
* off=3, size=1 - ok;
* off=0, size=2 - ok;
* off=1, size=2 - fail;
* off=0, size=2 - ok;
* off=3, size=2 - fail.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Makes it compatible with the logic that derives program type
from section name in libbpf_prog_type_by_name.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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At commit deee2cae27d1 ("kselftests/bpf: use ping6 as the default ipv6 ping
binary if it exists"), it fixed similar issues for shell script, but it
missed a same issue in the C code.
Fixes: 371e4fcc9d96 ("selftests/bpf: cgroup local storage-based network counters")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
CC: Philip Li <philip.li@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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This patch provides a tcp_bpf based eBPF sample. The test
- ncat(1) as the TCP client program to connect() to a port
with the intention of triggerring SYN retransmissions: we
first install an iptables DROP rule to make sure ncat SYNs are
resent (instead of aborting instantly after a TCP RST)
- has a bpf kernel module that sends a perf-event notification for
each TCP retransmit, and also tracks the number of such notifications
sent in the global_map
The test passes when the number of event notifications intercepted
in user-space matches the value in the global_map.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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This trivial XDP program does nothing, but will be used by the
next patch to test the GRO path in a net namespace, leveraging
the veth XDP implementation.
It's added here, despite its 'net' usage, to avoid the duplication
of the llc-related makefile boilerplate.
rfc v3 -> v1:
- move the helper implementation into the bpf directory, don't
touch udpgso_bench_rx
rfc v2 -> rfc v3:
- move 'x' option handling here
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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libbpf is now able to load successfully test_l4lb_noinline.o and
samples/bpf/tracex3_kern.o.
For the test_l4lb_noinline, uncomment related tests from test_libbpf.c
and remove the associated "TODO".
For tracex3_kern.o, instead of loading a program from samples/bpf/ that
might not have been compiled at this stage, try loading a program from
BPF selftests. Since this test case is about loading a program compiled
without the "-target bpf" flag, change the Makefile to compile one
program accordingly (instead of passing the flag for compiling all
programs).
Regarding test_xdp_noinline.o: in its current shape the program fails to
load because it provides no version section, but the loader needs one.
The test was added to make sure that libbpf could load XDP programs even
if they do not provide a version number in a dedicated section. But
libbpf is already capable of doing that: in our case loading fails
because the loader does not know that this is an XDP program (it does
not need to, since it does not attach the program). So trying to load
test_xdp_noinline.o does not bring much here: just delete this subtest.
For the record, the error message obtained with tracex3_kern.o was
fixed by commit e3d91b0ca523 ("tools/libbpf: handle issues with bpf ELF
objects containing .eh_frames")
I have not been abled to reproduce the "libbpf: incorrect bpf_call
opcode" error for test_l4lb_noinline.o, even with the version of libbpf
present at the time when test_libbpf.sh and test_libbpf_open.c were
created.
RFC -> v1:
- Compile test_xdp without the "-target bpf" flag, and try to load it
instead of ../../samples/bpf/tracex3_kern.o.
- Delete test_xdp_noinline.o subtest.
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Right now unprivileged tests are never executed as a BPF test run,
only loaded. Allow for running them as well so that we can check
the outcome and probe for regressions.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Add some more map related test cases to test_verifier kselftest
to improve test coverage. Summary: 1012 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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ping binary on some distros doesn't support "ping -6" anymore.
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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On our test machine, bpf selftest test_flow_dissector.sh failed
with the following error:
# ./test_flow_dissector.sh
bpffs not mounted. Mounting...
libbpf: failed to create map (name: 'jmp_table'): Operation not permitted
libbpf: failed to load object 'bpf_flow.o'
./flow_dissector_load: bpf_prog_load bpf_flow.o
selftests: test_flow_dissector [FAILED]
Let us increase the rlimit to remove the above map
creation failure.
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Commit b39b5f411dcf ("bpf: add cg_skb_is_valid_access for
BPF_PROG_TYPE_CGROUP_SKB") added support for returning pkt pointers
for direct packet access. Given this program type is allowed for both
unprivileged and privileged users, we shouldn't allow unprivileged
ones to use it, e.g. besides others one reason would be to avoid any
potential speculation on the packet test itself, thus guard this for
root only.
Fixes: b39b5f411dcf ("bpf: add cg_skb_is_valid_access for BPF_PROG_TYPE_CGROUP_SKB")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Given BPF_PROG_TYPE_CGROUP_SKB program types are also valid in an
unprivileged setting, lets not omit these tests and potentially
have issues fall through the cracks. Make this more obvious by
adding a small test_as_unpriv() helper.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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BPF sockmap and hashmap are dependent on CONFIG_BPF_STREAM_PARSER and
xskmap is dependent on CONFIG_XDP_SOCKETS
Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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The return value for each test in test_libbpf.sh is compared with
if (( $? == 0 )) ; then ...
This works well with bash, but not with dash, that /bin/sh is aliased to
on some systems (such as Ubuntu).
Let's replace this comparison by something that works on both shells.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Simplify bpf_perf_event_read_simple() a bit and fix up some minor
things along the way: the return code in the header is not of type
int but enum bpf_perf_event_ret instead. Once callback indicated
to break the loop walking event data, it also needs to be consumed
in data_tail since it has been processed already.
Moreover, bpf_perf_event_print_t callback should avoid void * as
we actually get a pointer to struct perf_event_header and thus
applications can make use of container_of() to have type checks.
The walk also doesn't have to use modulo op since the ring size is
required to be power of two.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Using reg_type_str[insn->dst_reg] is incorrect since insn->dst_reg
contains the register number but not the actual register type. Add
a small reg_state() helper and use it to get to the type. Also fix
up the test_verifier test cases that have an incorrect errstr.
Fixes: 9d2be44a7f33 ("bpf: Reuse canonical string formatter for ctx errs")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Add options to run msg_push_data, this patch creates two more flags
in test_sockmap that can be used to specify the offset and length
of bytes to be added. The new options are --txmsg_start_push to
specify where bytes should be inserted and --txmsg_end_push to
specify how many bytes. This is analagous to the options that are
used to pull data, --txmsg_start and --txmsg_end.
In addition to adding the options tests are added to the test
suit to run the tests similar to what was done for msg_pull_data.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Add support for new bpf_msg_push_data in libbpf.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Tests are added to make sure CGROUP_SKB cannot access:
tc_classid, data_meta, flow_keys
and can read and write:
mark, prority, and cb[0-4]
and can read other fields.
To make selftest with skb->sk work, a dummy sk is added in
bpf_prog_test_run_skb().
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Fixes: 371e4fcc9d96 ("selftests/bpf: cgroup local storage-based network counters")
Fixes: 370920c47b26 ("selftests/bpf: Test libbpf_{prog,attach}_type_by_name")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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test_maps:
Tests that queue/stack maps are behaving correctly even in corner cases
test_progs:
Tests new ebpf helpers
Signed-off-by: Mauricio Vasquez B <mauricio.vasquez@polito.it>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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FILE pointer variable f is opened but never closed.
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Add tests that do a MSG_PEEK recv followed by a regular receive to
test flag support.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Andrey reported a build error for the BPF kselftest suite when compiled on
a machine which does not have tls related header bits installed natively:
test_sockmap.c:120:23: fatal error: linux/tls.h: No such file or directory
#include <linux/tls.h>
^
compilation terminated.
Fix it by adding the header to the tools include infrastructure and add
definitions such as SOL_TLS that could potentially be missing.
Fixes: e9dd904708c4 ("bpf: add tls support for testing in test_sockmap")
Reported-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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This adds a --ktls option to test_sockmap in order to enable the
combination of ktls and sockmap to run, which makes for another
batch of 648 test cases for both in combination.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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When test_flow_dissector.sh runs it complains that it can't find script
with_addr.sh:
./test_flow_dissector.sh: line 81: ./with_addr.sh: No such file or
directory
Rework so that with_addr.sh gets installed, add it to
TEST_PROGS_EXTENDED variable.
Fixes: 50b3ed57dee9 ("selftests/bpf: test bpf flow dissection")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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When test_lwt_seg6local.sh was added commit c99a84eac026
("selftests/bpf: test for seg6local End.BPF action") config fragment
wasn't added, and without CONFIG_LWTUNNEL enabled we see this:
Error: CONFIG_LWTUNNEL is not enabled in this kernel.
selftests: test_lwt_seg6local [FAILED]
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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This XDP selftest also contain a small TC-bpf component. It provoke
the generic-XDP bug fixed in previous commit.
The selftest itself shows how to do VLAN manipulation from XDP and TC.
The test demonstrate how XDP ingress can remove a VLAN tag, and how TC
egress can add back a VLAN tag.
This use-case originates from a production need by ISP (kviknet.dk),
who gets DSL-lines terminated as VLAN Q-in-Q tagged packets, and want
to avoid having an net_device for every end-customer on the box doing
the L2 to L3 termination.
The test-setup is done via a veth-pair and creating two network
namespaces (ns1 and ns2). The 'ns1' simulate the ISP network that are
loading the BPF-progs stripping and adding VLAN IDs. The 'ns2'
simulate the DSL-customer that are using VLAN tagged packets.
Running the script with --interactive, will simply not call the
cleanup function. This gives the effect of creating a testlab, that
the users can inspect and play with. The --verbose option will simply
request that the shell will print input lines as they are read, this
include comments, which in effect make the comments visible docs.
Reported-by: Yoel Caspersen <yoel@kviknet.dk>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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The helper bpf_skb_vlan_push is needed by next patch, and the helper
bpf_skb_vlan_pop is added for completeness, regarding VLAN helpers.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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map_lookup_elem isn't supported by certain map types like:
- BPF_MAP_TYPE_PROG_ARRAY
- BPF_MAP_TYPE_STACK_TRACE
- BPF_MAP_TYPE_XSKMAP
- BPF_MAP_TYPE_SOCKMAP/BPF_MAP_TYPE_SOCKHASH
Let's add verfier tests to check whether verifier prevents
bpf_map_lookup_elem call on above programs from bpf program.
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Currently fixup map are named like fixup_map1, fixup_map2, and so on.
As suggested by Alexei let's change change map names such that we can
identify map type by looking at the name.
This patch is basically a find and replace change:
fixup_map1 -> fixup_map_hash_8b
fixup_map2 -> fixup_map_hash_48b
fixup_map3 -> fixup_map_hash_16b
fixup_map4 -> fixup_map_array_48b
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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