linux-toradex.git/samples/bpf, branch v4.14-rc7

bpf: Add lru_hash_lookup performance test

2017-09-01T16:57:38+00:00

Create a new case to test the LRU lookup performance.

At the beginning, the LRU map is fully loaded (i.e. the number of keys
is equal to map->max_entries).   The lookup is done through key 0
to num_map_entries and then repeats from 0 again.

This patch also creates an anonymous struct to properly
name the test params in stress_lru_hmap_alloc() in map_perf_test_kern.c.

Signed-off-by: Martin KaFai Lau 
Acked-by: Daniel Borkmann 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: Update cgroup socket examples to use uid gid helper

2017-09-01T05:05:15+00:00

Signed-off-by: David Ahern 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: Update cgrp2 socket tests

2017-09-01T05:05:15+00:00

Update cgrp2 bpf sock tests to check that device, mark and priority
can all be set on a socket via bpf programs attached to a cgroup.

Signed-off-by: David Ahern 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: Add option to dump socket settings

2017-09-01T05:05:15+00:00

Add option to dump socket settings. Will be used in the next patch
to verify bpf programs are correctly setting mark, priority and
device based on the cgroup attachment for the program run.

Signed-off-by: David Ahern 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: Add detach option to test_cgrp2_sock

2017-09-01T05:05:15+00:00

Add option to detach programs from a cgroup.

Signed-off-by: David Ahern 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: Update sock test to allow setting mark and priority

2017-09-01T05:05:15+00:00

Update sock test to set mark and priority on socket create.

Signed-off-by: David Ahern 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: Fix compilation issue in redirect dummy program

2017-08-31T18:56:57+00:00

Fix compilation error below:

$ make samples/bpf/

LLVM ERROR: 'xdp_redirect_dummy' label emitted multiple times to
assembly file
make[1]: *** [samples/bpf/xdp_redirect_kern.o] Error 1
make: *** [samples/bpf/] Error 2

Fixes: 306da4e685b4 ("samples/bpf: xdp_redirect load XDP dummy prog on TX device")
Signed-off-by: Tariq Toukan 
Acked-by: Jesper Dangaard Brouer 
Acked-by: Daniel Borkmann 
Signed-off-by: David S. Miller

samples/bpf: xdp_monitor tool based on tracepoints

2017-08-29T17:51:29+00:00

This tool xdp_monitor demonstrate how to use the different xdp_redirect
tracepoints xdp_redirect{,_map}{,_err} from a BPF program.

The default mode is to only monitor the error counters, to avoid
affecting the per packet performance. Tracepoints comes with a base
overhead of 25 nanosec for an attached bpf_prog, and 48 nanosec for
using a full perf record (with non-matching filter).  Thus, default
loading the --stats mode could affect the maximum performance.

This version of the tool is very simple and count all types of errors
as one.  It will be natural to extend this later with the different
types of errors that can occur, which should help users quickly
identify common mistakes.

Because the TP_STRUCT was kept in sync all the tracepoints loads the
same BPF code.  It would also be natural to extend the map version to
demonstrate how the map information could be used.

Signed-off-by: Jesper Dangaard Brouer 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller

samples/bpf: xdp_redirect load XDP dummy prog on TX device

2017-08-29T17:51:29+00:00

For supporting XDP_REDIRECT, a device driver must (obviously)
implement the "TX" function ndo_xdp_xmit().  An additional requirement
is you cannot TX out a device, unless it also have a xdp bpf program
attached. This dependency is caused by the driver code need to setup
XDP resources before it can ndo_xdp_xmit.

Update bpf samples xdp_redirect and xdp_redirect_map to automatically
attach a dummy XDP program to the configured ifindex_out device.  Use
the XDP flag XDP_FLAGS_UPDATE_IF_NOEXIST on the dummy load, to avoid
overriding an existing XDP prog on the device.

Signed-off-by: Jesper Dangaard Brouer 
Signed-off-by: David S. Miller

samples/bpf: extend test_tunnel_bpf.sh with ERSPAN

2017-08-28T22:04:52+00:00

Extend existing tests for vxlan, gre, geneve, ipip to
include ERSPAN tunnel.

Signed-off-by: William Tu 
Acked-by: Alexei Starovoitov 
Signed-off-by: David S. Miller