Jianlin Lv 929e54a989 bpf: Fix compilation warning of selftests ...

Clang compiler version: 12.0.0
The following warning appears during the selftests/bpf compilation:

prog_tests/send_signal.c:51:3: warning: ignoring return value of ‘write’,
declared with attribute warn_unused_result [-Wunused-result]
   51 |   write(pipe_c2p[1], buf, 1);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~
prog_tests/send_signal.c:54:3: warning: ignoring return value of ‘read’,
declared with attribute warn_unused_result [-Wunused-result]
   54 |   read(pipe_p2c[0], buf, 1);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~
......

prog_tests/stacktrace_build_id_nmi.c:13:2: warning: ignoring return value
of ‘fscanf’,declared with attribute warn_unused_result [-Wunused-resul]
   13 |  fscanf(f, "%llu", &sample_freq);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

test_tcpnotify_user.c:133:2: warning:ignoring return value of ‘system’,
declared with attribute warn_unused_result [-Wunused-result]
  133 |  system(test_script);
      |  ^~~~~~~~~~~~~~~~~~~
test_tcpnotify_user.c:138:2: warning:ignoring return value of ‘system’,
declared with attribute warn_unused_result [-Wunused-result]
  138 |  system(test_script);
      |  ^~~~~~~~~~~~~~~~~~~
test_tcpnotify_user.c:143:2: warning:ignoring return value of ‘system’,
declared with attribute warn_unused_result [-Wunused-result]
  143 |  system(test_script);
      |  ^~~~~~~~~~~~~~~~~~~

Add code that fix compilation warning about ignoring return value and
handles any errors; Check return value of library`s API make the code
more secure.

Signed-off-by: Jianlin Lv <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

2020-08-06 16:58:42 -07:00

..

.gitignore

…

align.c

selftests/bpf: Move test_align under test_progs

2020-05-16 01:18:14 +02:00

attach_probe.c

…

autoload.c

selftests/bpf: Test auto-load disabling logic for BPF programs

2020-06-28 10:06:53 -07:00

bpf_iter.c

tools/bpf: Support new uapi for map element bpf iterator

2020-08-06 16:39:14 -07:00

bpf_obj_id.c

selftests/bpf: Test bpf_link's get_next_id, get_fd_by_id, and get_obj_info

2020-04-28 17:27:08 -07:00

bpf_tcp_ca.c

…

bpf_verif_scale.c

…

btf_dump.c

…

btf_map_in_map.c

selftests/bpf: Extend map-in-map selftest to detect memory leaks

2020-07-30 01:30:26 +02:00

cg_storage_multi.c

selftests/bpf: Don't destroy failed link

2020-07-31 00:43:49 +02:00

cgroup_attach_autodetach.c

…

cgroup_attach_multi.c

bpf: cgroup: Allow multi-attach program to replace itself

2020-06-09 11:21:43 -07:00

cgroup_attach_override.c

…

cgroup_link.c

selftests/bpf: Add link detach tests for cgroup, netns, and xdp bpf_links

2020-08-01 20:38:28 -07:00

cgroup_skb_sk_lookup.c

bpf: selftests: A few improvements to network_helpers.c

2020-07-02 16:09:01 +02:00

cls_redirect.c

selftests/bpf: Add cls_redirect classifier

2020-04-26 10:00:36 -07:00

connect_force_port.c

bpf: selftests: A few improvements to network_helpers.c

2020-07-02 16:09:01 +02:00

core_extern.c

…

core_reloc.c

selftests/bpf: Fix invalid memory reads in core_relo selftest

2020-04-28 19:48:05 -07:00

core_retro.c

selftests/bpf: Fix spurious test failures in core_retro selftest

2020-08-01 23:10:42 -07:00

cpu_mask.c

…

enable_stats.c

bpf: Add selftest for BPF_ENABLE_STATS

2020-05-01 10:36:32 -07:00

endian.c

selftests/bpf: Add byte swapping selftest

2020-07-01 09:06:12 +02:00

fentry_fexit.c

bpf: Add tests for PTR_TO_BTF_ID vs. null comparison

2020-06-30 22:21:29 +02:00

fentry_test.c

…

fexit_bpf2bpf.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

fexit_stress.c

…

fexit_test.c

…

flow_dissector_load_bytes.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

flow_dissector_reattach.c

selftests: bpf: Pass program and target_fd in flow_dissector_reattach

2020-06-30 10:46:39 -07:00

flow_dissector.c

selftests: bpf: Pass program to bpf_prog_detach in flow_dissector

2020-06-30 10:46:39 -07:00

get_stack_raw_tp.c

…

get_stackid_cannot_attach.c

selftests/bpf: Add get_stackid_cannot_attach

2020-07-25 20:16:35 -07:00

global_data_init.c

…

global_data.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

hashmap.c

selftests/bpf: Convert test_hashmap into test_progs test

2020-04-28 19:48:05 -07:00

kfree_skb.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

ksyms.c

selftests/bpf: Add __ksym extern selftest

2020-06-22 17:01:48 -07:00

l4lb_all.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

link_pinning.c

…

load_bytes_relative.c

bpf: selftests: A few improvements to network_helpers.c

2020-07-02 16:09:01 +02:00

map_lock.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

map_ptr.c

selftests/bpf: Test access to bpf map pointer

2020-06-22 22:22:59 +02:00

mmap.c

bpf: Prevent mmap()'ing read-only maps as writable

2020-05-20 20:21:53 -07:00

modify_return.c

…

ns_current_pid_tgid.c

selftests/bpf: Fix bpf_link leak in ns_current_pid_tgid selftest

2020-04-28 19:48:05 -07:00

obj_name.c

…

perf_branches.c

…

perf_buffer.c

selftests/bpf: Switch perf_buffer test to tracepoint and skeleton

2020-07-09 00:44:45 +02:00

perf_event_stackmap.c

selftests/bpf: Add callchain_stackid

2020-07-25 20:16:35 -07:00

pinning.c

…

pkt_access.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

pkt_md_access.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

probe_user.c

…

prog_run_xattr.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

queue_stack_map.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

raw_tp_writable_reject_nbd_invalid.c

…

raw_tp_writable_test_run.c

…

rdonly_maps.c

…

reference_tracking.c

…

resolve_btfids.c

bpf: Add BTF_ID_LIST_GLOBAL in btf_ids.h

2020-07-21 13:26:26 -07:00

ringbuf_multi.c

selftests/bpf: Add BPF ringbuf selftests

2020-06-01 14:38:22 -07:00

ringbuf.c

selftests/bpf: Fix ringbuf selftest sample counting undeterminism

2020-06-08 16:00:42 +02:00

section_names.c

libbpf: Add support for BPF XDP link

2020-07-25 20:37:02 -07:00

select_reuseport.c

…

send_signal_sched_switch.c

…

send_signal.c

bpf: Fix compilation warning of selftests

2020-08-06 16:58:42 -07:00

signal_pending.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

sk_assign.c

selftests/bpf: Use SOCKMAP for server sockets in bpf_sk_assign test

2020-04-29 23:31:00 +02:00

sk_lookup.c

selftests/bpf: Add link detach tests for cgroup, netns, and xdp bpf_links

2020-08-01 20:38:28 -07:00

skb_ctx.c

bpf: Allow to specify ifindex for skb in bpf_prog_test_run_skb

2020-08-03 23:32:23 +02:00

skb_helpers.c

bpf, selftests: Test probe_* helpers from SCHED_CLS

2020-06-01 14:38:21 -07:00

skeleton.c

tools/bpftool: Strip away modifiers from global variables

2020-07-13 17:07:43 -07:00

sockmap_basic.c

bpf, selftests: Add sk_msg helpers load and attach test

2020-06-01 14:38:20 -07:00

sockmap_ktls.c

…

sockmap_listen.c

…

sockopt_inherit.c

selftests/bpf: Fix possible hang in sockopt_inherit

2020-07-16 20:57:09 +02:00

sockopt_multi.c

…

sockopt_sk.c

selftests/bpf: Make sure optvals > PAGE_SIZE are bypassed

2020-06-17 10:54:05 -07:00

sockopt.c

…

spinlock.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

stacktrace_build_id_nmi.c

bpf: Fix compilation warning of selftests

2020-08-06 16:58:42 -07:00

stacktrace_build_id.c

…

stacktrace_map_raw_tp.c

…

stacktrace_map.c

…

tailcalls.c

…

task_fd_query_rawtp.c

…

task_fd_query_tp.c

…

tcp_estats.c

…

tcp_rtt.c

bpf: selftests: A few improvements to network_helpers.c

2020-07-02 16:09:01 +02:00

test_global_funcs.c

…

test_lsm.c

…

test_overhead.c

selftest/bpf: Fmod_ret prog and implement test_overhead as part of bench

2020-05-13 12:19:38 -07:00

tp_attach_query.c

…

trace_printk.c

selftests/bpf: Add selftests verifying bpf_trace_printk() behaviour

2020-07-13 16:55:49 -07:00

trampoline_count.c

…

udp_limit.c

selftests/bpf: Test BPF_CGROUP_INET_SOCK_RELEASE

2020-07-08 01:07:36 +02:00

varlen.c

selftests/bpf: Add variable-length data concat pattern less than test

2020-06-24 00:04:36 +02:00

vmlinux.c

…

xdp_adjust_tail.c

selftests/bpf: Xdp_adjust_tail add grow tail tests

2020-05-14 21:21:57 -07:00

xdp_attach.c

selftests/bpf: Check for correct program attach/detach in xdp_attach test

2020-04-15 13:26:08 +02:00

xdp_bpf2bpf.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

xdp_cpumap_attach.c

selftest: Add tests for XDP programs in CPUMAP entries

2020-07-16 17:00:32 +02:00

xdp_devmap_attach.c

bpf: Selftests and tools use struct bpf_devmap_val from uapi

2020-06-09 11:36:19 -07:00

xdp_info.c

…

xdp_link.c

selftests/bpf: Add link detach tests for cgroup, netns, and xdp bpf_links

2020-08-01 20:38:28 -07:00

xdp_noinline.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00

xdp_perf.c

…

xdp.c

selftests/bpf: Move existing common networking parts into network_helpers

2020-05-09 00:48:20 +02:00