linux-stable.git/samples/sockmap, branch v4.16

bpf: sockmap set rlimit

2018-01-24T09:46:59+00:00

Avoid extra step of setting limit from cmdline and do it directly in
the program.

Signed-off-by: John Fastabend 
Acked-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

bpf: sockmap put client sockets in blocking mode

2018-01-24T09:46:59+00:00

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 
Acked-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

bpf: sockmap sample add base test without any BPF for comparison

2018-01-24T09:46:59+00:00

Add a base test that does not use BPF hooks to test baseline case.

Signed-off-by: John Fastabend 
Acked-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

bpf: sockmap sample, report bytes/sec

2018-01-24T09:46:59+00:00

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 
Acked-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

bpf: sockmap sample, use fork() for send and recv

2018-01-24T09:46:58+00:00

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 
Acked-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

bpf: add sendmsg option for testing BPF programs

2018-01-24T09:46:58+00:00

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 
 options:
 --help         -h
 --cgroup       -c
 --rate         -r
 --verbose      -v
 --iov_count    -i
 --length       -l
 --test         -t

Signed-off-by: John Fastabend 
Signed-off-by: Daniel Borkmann

bpf: refactor sockmap sample program update for arg parsing

2018-01-24T09:46:58+00:00

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 
Acked-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

kbuild: remove all dummy assignments to obj-

2017-11-18T02:46:06+00:00

Now kbuild core scripts create empty built-in.o where necessary.
Remove "obj- := dummy.o" tricks.

Signed-off-by: Masahiro Yamada

bpf: avoid preempt enable/disable in sockmap using tcp_skb_cb region

2017-10-20T12:01:29+00:00

SK_SKB BPF programs are run from the socket/tcp context but early in
the stack before much of the TCP metadata is needed in tcp_skb_cb. So
we can use some unused fields to place BPF metadata needed for SK_SKB
programs when implementing the redirect function.

This allows us to drop the preempt disable logic. It does however
require an API change so sk_redirect_map() has been updated to
additionally provide ctx_ptr to skb. Note, we do however continue to
disable/enable preemption around actual BPF program running to account
for map updates.

Signed-off-by: John Fastabend 
Acked-by: Daniel Borkmann 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

bpf: convert sockmap field attach_bpf_fd2 to type

2017-08-28T18:13:21+00:00

In the initial sockmap API we provided strparser and verdict programs
using a single attach command by extending the attach API with a the
attach_bpf_fd2 field.

However, if we add other programs in the future we will be adding a
field for every new possible type, attach_bpf_fd(3,4,..). This
seems a bit clumsy for an API. So lets push the programs using two
new type fields.

   BPF_SK_SKB_STREAM_PARSER
   BPF_SK_SKB_STREAM_VERDICT

This has the advantage of having a readable name and can easily be
extended in the future.

Updates to samples and sockmap included here also generalize tests
slightly to support upcoming patch for multiple map support.

Signed-off-by: John Fastabend 
Fixes: 174a79ff9515 ("bpf: sockmap with sk redirect support")
Suggested-by: Alexei Starovoitov 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller