kernel/linux.git/samples/bpf, branch v4.18.17

samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM

2018-09-15T07:46:48+00:00

[ Upstream commit 817b89beb9d8876450fcde9155e17425c329569d ] It is common XDP practice to unload/deattach the XDP bpf program, when the XDP sample program is Ctrl-C interrupted (SIGINT) or killed (SIGTERM). The samples/bpf programs xdp_redirect_cpu and xdp_rxq_info, forgot to trap signal SIGTERM (which is the default signal used by the kill command). This was discovered by Red Hat QA, which automated scripts depend on killing the XDP sample program after a timeout period. Fixes: fad3917e361b ("samples/bpf: add cpumap sample program xdp_redirect_cpu") Fixes: 0fca931a6f21 ("samples/bpf: program demonstrating access to xdp_rxq_info") Reported-by: Jean-Tsung Hsiao Signed-off-by: Jesper Dangaard Brouer Acked-by: Yonghong Song Signed-off-by: Daniel Borkmann Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

samples/bpf: xdp_redirect_cpu adjustment to reproduce teardown race easier

2018-08-09T19:50:44+00:00

The teardown race in cpumap is really hard to reproduce. These changes makes it easier to reproduce, for QA. The --stress-mode now have a case of a very small queue size of 8, that helps to trigger teardown flush to encounter a full queue, which results in calling xdp_return_frame API, in a non-NAPI protect context. Also increase MAX_CPUS, as my QA department have larger machines than me. Tested-by: Jean-Tsung Hsiao Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Daniel Borkmann

samples/bpf: Fix tc and ip paths in xdp2skb_meta.sh

2018-07-10T07:19:01+00:00

The below path error can occur: # ./xdp2skb_meta.sh --dev eth0 --list ./xdp2skb_meta.sh: line 61: /usr/sbin/tc: No such file or directory So just use command names instead of absolute paths of tc and ip. In addition, it allow callers to redefine $TC and $IP paths Fixes: 36e04a2d78d9 ("samples/bpf: xdp2skb_meta shows transferring info from XDP to SKB") Reviewed-by: Jesper Dangaard Brouer Signed-off-by: Taeung Song Acked-by: Jesper Dangaard Brouer Signed-off-by: Daniel Borkmann

samples/bpf: add .gitignore file

2018-07-05T07:58:53+00:00

For untracked executables of samples/bpf, add this. Untracked files: (use "git add ..." to include in what will be committed) samples/bpf/cpustat samples/bpf/fds_example samples/bpf/lathist samples/bpf/load_sock_ops ... Signed-off-by: Taeung Song Acked-by: David S. Miller Signed-off-by: Daniel Borkmann

samples/bpf: Check the error of write() and read()

2018-07-05T07:58:52+00:00

test_task_rename() and test_urandom_read() can be failed during write() and read(), So check the result of them. Reviewed-by: David Laight Signed-off-by: Taeung Song Acked-by: David S. Miller Signed-off-by: Daniel Borkmann

samples/bpf: Check the result of system()

2018-07-05T07:58:52+00:00

To avoid the below build warning message, use new generate_load() checking the return value. ignoring return value of ‘system’, declared with attribute warn_unused_result And it also refactors the duplicate code of both test_perf_event_all_cpu() and test_perf_event_task() Cc: Teng Qin Signed-off-by: Taeung Song Acked-by: David S. Miller Signed-off-by: Daniel Borkmann

samples/bpf: add missing

2018-07-05T07:58:52+00:00

This fixes build error regarding redefinition: CLANG-bpf samples/bpf/parse_varlen.o samples/bpf/parse_varlen.c:111:8: error: redefinition of 'vlan_hdr' struct vlan_hdr { ^ ./include/linux/if_vlan.h:38:8: note: previous definition is here So remove duplicate 'struct vlan_hdr' in sample code and include if_vlan.h Signed-off-by: Taeung Song Acked-by: David S. Miller Signed-off-by: Daniel Borkmann

samples/bpf: deal with EBUSY return code from sendmsg in xdpsock sample

2018-07-03T01:37:12+00:00

Sendmsg in the SKB path of AF_XDP can now return EBUSY when a packet was discarded and completed by the driver. Just ignore this message in the sample application. Fixes: b4b8faa1ded7 ("samples/bpf: sample application and documentation for AF_XDP sockets") Signed-off-by: Magnus Karlsson Reported-by: Pavel Odintsov Signed-off-by: Alexei Starovoitov

bpf: Change bpf_fib_lookup to return lookup status

2018-06-28T22:02:02+00:00

For ACLs implemented using either FIB rules or FIB entries, the BPF program needs the FIB lookup status to be able to drop the packet. Since the bpf_fib_lookup API has not reached a released kernel yet, change the return code to contain an encoding of the FIB lookup result and return the nexthop device index in the params struct. In addition, inform the BPF program of any post FIB lookup reason as to why the packet needs to go up the stack. The fib result for unicast routes must have an egress device, so remove the check that it is non-NULL. Signed-off-by: David Ahern Signed-off-by: Daniel Borkmann

samples/bpf: xdpsock: use skb Tx path for XDP_SKB

2018-06-05T13:48:57+00:00

Make sure that XDP_SKB also uses the skb Tx path. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann