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  1. 28 4月, 2019 1 次提交
  3. 13 4月, 2019 1 次提交
    • A
      selftests/bpf: Test BPF_CGROUP_SYSCTL · 1f5fa9ab
      由 Andrey Ignatov 提交于 
      Add unit test for BPF_PROG_TYPE_CGROUP_SYSCTL program type.

Test that program can allow/deny access.
Test both valid and invalid accesses to ctx->write.

Example of output:
  # ./test_sysctl
  Test case: sysctl wrong attach_type .. [PASS]
  Test case: sysctl:read allow all .. [PASS]
  Test case: sysctl:read deny all .. [PASS]
  Test case: ctx:write sysctl:read read ok .. [PASS]
  Test case: ctx:write sysctl:write read ok .. [PASS]
  Test case: ctx:write sysctl:read write reject .. [PASS]
  Summary: 6 PASSED, 0 FAILED
Signed-off-by: NAndrey Ignatov <rdna@fb.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
      1f5fa9ab
  5. 03 4月, 2019 1 次提交
    • S
      selftests: bpf: tests.h should depend on .c files, not the output · 6b7b6995
      由 Stanislav Fomichev 提交于 
      This makes sure we don't put headers as input files when doing
compilation, because clang complains about the following:

clang-9: error: cannot specify -o when generating multiple output files
../lib.mk:152: recipe for target 'xxx/tools/testing/selftests/bpf/test_verifier' failed
make: *** [xxx/tools/testing/selftests/bpf/test_verifier] Error 1
make: *** Waiting for unfinished jobs....
clang-9: error: cannot specify -o when generating multiple output files
../lib.mk:152: recipe for target 'xxx/tools/testing/selftests/bpf/test_progs' failed
Signed-off-by: NStanislav Fomichev <sdf@google.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      6b7b6995
  7. 23 3月, 2019 2 次提交
  9. 22 3月, 2019 2 次提交
  11. 07 3月, 2019 1 次提交
    • S
      selftests: bpf: fix compilation with out-of-tree $(OUTPUT) · e78e00bd
      由 Stanislav Fomichev 提交于 
      A bunch of related changes lumped together:
* Create prog_tests and verifier output directories; these don't exist with
  out-of-tree $(OUTPUT)
* Add missing -I (via separate TEST_{PROGS,VERIFIER}_CFLAGS) for the main tree
  ($(PWD) != $(OUTPUT) for out-of-tree)
* Add libbpf.a dependency for test_progs_32 (parallel make fails otherwise)
* Add missing "; \" after "cd" when generating test.h headers

Tested by:
$ alias m="make -s -j$(nproc)"
$ m -C tools/testing/selftests/bpf/ clean
$ m -C tools/lib/bpf/ clean
$ rm -rf xxx; mkdir xxx; m -C tools/testing/selftests/bpf/ OUTPUT=$PWD/xxx
$ m -C tools/testing/selftests/bpf/

Fixes: 3f306588 ("selftests: bpf: break up test_progs - preparations")
Fixes: 2dfb4012 ("selftests: bpf: prepare for break up of verifier tests")
Fixes: 3ef84346 ("selftests: bpf: makefile support sub-register code-gen test mode")
Signed-off-by: NStanislav Fomichev <sdf@google.com>
Acked-by: NYonghong Song <yhs@fb.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      e78e00bd
  13. 03 3月, 2019 1 次提交
    • S
      selftests: bpf: break up test_progs - preparations · 3f306588
      由 Stanislav Fomichev 提交于 
      Add new prog_tests directory where tests are supposed to land.
Each prog_tests/<filename>.c is expected to have a global function
with signature 'void test_<filename>(void)'. Makefile automatically
generates prog_tests/tests.h file with entry for each prog_tests file:

	#ifdef DECLARE
	extern void test_<filename>(void);
	...
	#endif

	#ifdef CALL
	test_<filename>();
	...
	#endif

prog_tests/tests.h is included in test_progs.c in two places with
appropriate defines. This scheme allows us to move each function with
a separate patch without breaking anything.

Compared to the recent verifier split, each separate file here is
a compilation unit and test_progs.[ch] is now used as a place to put
some common routines that might be used by multiple tests.
Signed-off-by: NStanislav Fomichev <sdf@google.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
      3f306588
  15. 14 2月, 2019 1 次提交
  17. 12 2月, 2019 3 次提交
  19. 11 2月, 2019 1 次提交
  21. 02 2月, 2019 3 次提交
  23. 29 1月, 2019 1 次提交
  25. 28 1月, 2019 1 次提交
  27. 27 1月, 2019 1 次提交
  29. 25 1月, 2019 1 次提交
  31. 16 1月, 2019 1 次提交
  33. 10 1月, 2019 1 次提交
  35. 22 11月, 2018 1 次提交
  37. 21 11月, 2018 1 次提交
  39. 09 11月, 2018 1 次提交
    • S
      selftests/bpf: add a test case for sock_ops perf-event notification · 435f90a3
      由 Sowmini Varadhan 提交于 
      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: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      435f90a3
  41. 08 11月, 2018 2 次提交
    • P
      selftests: add dummy xdp test helper · bd8e1afe
      由 Paolo Abeni 提交于 
      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: NPaolo Abeni <pabeni@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      bd8e1afe
    • Q
      selftests/bpf: enable (uncomment) all tests in test_libbpf.sh · f96afa76
      由 Quentin Monnet 提交于 
      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 e3d91b0c ("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: NQuentin Monnet <quentin.monnet@netronome.com>
Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: NJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      f96afa76
  43. 20 10月, 2018 1 次提交
  45. 11 10月, 2018 1 次提交
  47. 10 10月, 2018 1 次提交
    • J
      selftests/bpf: add XDP selftests for modifying and popping VLAN headers · 97396ff0
      由 Jesper Dangaard Brouer 提交于 
      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: NYoel Caspersen <yoel@kviknet.dk>
Signed-off-by: NJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
      97396ff0
  49. 03 10月, 2018 1 次提交
  51. 01 10月, 2018 1 次提交
    • R
      selftests/bpf: cgroup local storage-based network counters · 371e4fcc
      由 Roman Gushchin 提交于 
      This commit adds a bpf kselftest, which demonstrates how percpu
and shared cgroup local storage can be used for efficient lookup-free
network accounting.

Cgroup local storage provides generic memory area with a very efficient
lookup free access. To avoid expensive atomic operations for each
packet, per-cpu cgroup local storage is used. Each packet is initially
charged to a per-cpu counter, and only if the counter reaches certain
value (32 in this case), the charge is moved into the global atomic
counter. This allows to amortize atomic operations, keeping reasonable
accuracy.

The test also implements a naive network traffic throttling, mostly to
demonstrate the possibility of bpf cgroup--based network bandwidth
control.

Expected output:
  ./test_netcnt
  test_netcnt:PASS
Signed-off-by: NRoman Gushchin <guro@fb.com>
Acked-by: NSong Liu <songliubraving@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      371e4fcc
  53. 28 9月, 2018 1 次提交
  55. 15 9月, 2018 2 次提交
  57. 13 8月, 2018 1 次提交
    • A
      selftests/bpf: Selftest for bpf_skb_ancestor_cgroup_id · 5ecd8c22
      由 Andrey Ignatov 提交于 
      Add selftests for bpf_skb_ancestor_cgroup_id helper.

test_skb_cgroup_id.sh prepares testing interface and adds tc qdisc and
filter for it using BPF object compiled from test_skb_cgroup_id_kern.c
program.

BPF program in test_skb_cgroup_id_kern.c gets ancestor cgroup id using
the new helper at different levels of cgroup hierarchy that skb belongs
to, including root level and non-existing level, and saves it to the map
where the key is the level of corresponding cgroup and the value is its
id.

To trigger BPF program, user space program test_skb_cgroup_id_user is
run. It adds itself into testing cgroup and sends UDP datagram to
link-local multicast address of testing interface. Then it reads cgroup
ids saved in kernel for different levels from the BPF map and compares
them with those in user space. They must be equal for every level of
ancestry.

Example of run:
  # ./test_skb_cgroup_id.sh
  Wait for testing link-local IP to become available ... OK
  Note: 8 bytes struct bpf_elf_map fixup performed due to size mismatch!
  [PASS]
Signed-off-by: NAndrey Ignatov <rdna@fb.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      5ecd8c22
  59. 11 8月, 2018 1 次提交
  61. 03 8月, 2018 1 次提交
    • R
      selftests/bpf: add a cgroup storage test · 68cfa3ac
      由 Roman Gushchin 提交于 
      Implement a test to cover the cgroup storage functionality.
The test implements a bpf program which drops every second packet
by using the cgroup storage as a persistent storage.

The test also use the userspace API to check the data
in the cgroup storage, alter it, and check that the loaded
and attached bpf program sees the update.

Expected output:
  $ ./test_cgroup_storage
  test_cgroup_storage:PASS
Signed-off-by: NRoman Gushchin <guro@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: NMartin KaFai Lau <kafai@fb.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      68cfa3ac
  63. 31 7月, 2018 1 次提交
    • A
      selftests/bpf: Test for get_socket_cookie · 194db0d9
      由 Andrey Ignatov 提交于 
      Add test to use get_socket_cookie() from BPF programs of types
BPF_PROG_TYPE_SOCK_OPS and BPF_PROG_TYPE_CGROUP_SOCK_ADDR.

The test attaches two programs to cgroup, runs TCP server and client in
the cgroup and checks that two operations are done properly on client
socket when user calls connect(2):

1. In BPF_CGROUP_INET6_CONNECT socket cookie is used as the key to write
   new value in a map for client socket.

2. In BPF_CGROUP_SOCK_OPS (BPF_SOCK_OPS_TCP_CONNECT_CB callback) the
   value written in "1." is found by socket cookie, since it's the same
   socket, and updated.

Finally the test verifies the value in the map.
Signed-off-by: NAndrey Ignatov <rdna@fb.com>
Acked-by: NYonghong Song <yhs@fb.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      194db0d9