Andrii Nakryiko dca5612f8e libbpf: Add perf_buffer APIs for better integration with outside epoll loop ... Add a set of APIs to perf_buffer manage to allow applications to integrate perf buffer polling into existing epoll-based infrastructure. One example is applications using libevent already and wanting to plug perf_buffer polling, instead of relying on perf_buffer__poll() and waste an extra thread to do it. But perf_buffer is still extremely useful to set up and consume perf buffer rings even for such use cases. So to accomodate such new use cases, add three new APIs: - perf_buffer__buffer_cnt() returns number of per-CPU buffers maintained by given instance of perf_buffer manager; - perf_buffer__buffer_fd() returns FD of perf_event corresponding to a specified per-CPU buffer; this FD is then polled independently; - perf_buffer__consume_buffer() consumes data from single per-CPU buffer, identified by its slot index. To support a simpler, but less efficient, way to integrate perf_buffer into external polling logic, also expose underlying epoll FD through perf_buffer__epoll_fd() API. It will need to be followed by perf_buffer__poll(), wasting extra syscall, or perf_buffer__consume(), wasting CPU to iterate buffers with no data. But could be simpler and more convenient for some cases. These APIs allow for great flexiblity, but do not sacrifice general usability of perf_buffer. Also exercise and check new APIs in perf_buffer selftest. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Alan Maguire <alan.maguire@oracle.com> Link: https://lore.kernel.org/bpf/20200821165927.849538-1-andriin@fb.com		2020-08-21 14:26:55 -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	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
bpf_tcp_ca.c
bpf_verif_scale.c
btf_dump.c	selftests/bpf: Fix btf_dump test cases on 32-bit arches	2020-08-13 16:45:41 -07:00
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	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
core_reloc.c	selftests/bpf: Add tests for ENUMVAL_EXISTS/ENUMVAL_VALUE relocations	2020-08-19 14:19:39 -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	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
fexit_stress.c
fexit_test.c
flow_dissector.c	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
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
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.c	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
global_data_init.c
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	selftests/bpf: Fix segmentation fault in test_progs	2020-08-11 15:36:45 +02:00
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	libbpf: Add perf_buffer APIs for better integration with outside epoll loop	2020-08-21 14:26:55 -07:00
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	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
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.c	selftests/bpf: Fix ringbuf selftest sample counting undeterminism	2020-06-08 16:00:42 +02:00
ringbuf_multi.c	selftests/bpf: Add BPF ringbuf selftests	2020-06-01 14:38:22 -07:00
section_names.c	libbpf: Add support for BPF XDP link	2020-07-25 20:37:02 -07:00
select_reuseport.c
send_signal.c	bpf: Fix compilation warning of selftests	2020-08-06 16:58:42 -07:00
send_signal_sched_switch.c
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: Fix two minor compilation warnings reported by GCC 4.9	2020-08-20 16:45:09 +02:00
sk_lookup.c	selftests/bpf: Fix v4_to_v6 in sk_lookup	2020-08-11 15:36:51 +02:00
skb_ctx.c	selftest/bpf: Fix compilation warnings in 32-bit mode	2020-08-13 16:45:41 -07:00
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.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
spinlock.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
stacktrace_build_id.c
stacktrace_build_id_nmi.c	bpf: Fix compilation warning of selftests	2020-08-06 16:58:42 -07:00
stacktrace_map.c
stacktrace_map_raw_tp.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_bpffs.c	selftests/bpf: Add bpffs preload test.	2020-08-20 16:02:36 +02:00
test_global_funcs.c
test_lsm.c	bpf, lsm: Fix the file_mprotect LSM test.	2020-04-02 19:42:52 -07:00
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: Make test_varlen work with 32-bit user-space arch	2020-08-13 16:45:41 -07:00
vmlinux.c
xdp.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
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	selftests/bpf: Add test for bpf_get_link_xdp_id	2020-04-08 01:35:24 +02:00
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