Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
pull-request: bpf-next 2019-10-27

The following pull-request contains BPF updates for your *net-next* tree.

We've added 52 non-merge commits during the last 11 day(s) which contain
a total of 65 files changed, 2604 insertions(+), 1100 deletions(-).

The main changes are:

 1) Revolutionize BPF tracing by using in-kernel BTF to type check BPF
    assembly code. The work here teaches BPF verifier to recognize
    kfree_skb()'s first argument as 'struct sk_buff *' in tracepoints
    such that verifier allows direct use of bpf_skb_event_output() helper
    used in tc BPF et al (w/o probing memory access) that dumps skb data
    into perf ring buffer. Also add direct loads to probe memory in order
    to speed up/replace bpf_probe_read() calls, from Alexei Starovoitov.

 2) Big batch of changes to improve libbpf and BPF kselftests. Besides
    others: generalization of libbpf's CO-RE relocation support to now
    also include field existence relocations, revamp the BPF kselftest
    Makefile to add test runner concept allowing to exercise various
    ways to build BPF programs, and teach bpf_object__open() and friends
    to automatically derive BPF program type/expected attach type from
    section names to ease their use, from Andrii Nakryiko.

 3) Fix deadlock in stackmap's build-id lookup on rq_lock(), from Song Liu.

 4) Allow to read BTF as raw data from bpftool. Most notable use case
    is to dump /sys/kernel/btf/vmlinux through this, from Jiri Olsa.

 5) Use bpf_redirect_map() helper in libbpf's AF_XDP helper prog which
    manages to improve "rx_drop" performance by ~4%., from Björn Töpel.

 6) Fix to restore the flow dissector after reattach BPF test and also
    fix error handling in bpf_helper_defs.h generation, from Jakub Sitnicki.

 7) Improve verifier's BTF ctx access for use outside of raw_tp, from
    Martin KaFai Lau.

 8) Improve documentation for AF_XDP with new sections and to reflect
    latest features, from Magnus Karlsson.

 9) Add back 'version' section parsing to libbpf for old kernels, from
    John Fastabend.

10) Fix strncat bounds error in libbpf's libbpf_prog_type_by_name(),
    from KP Singh.

11) Turn on -mattr=+alu32 in LLVM by default for BPF kselftests in order
    to improve insn coverage for built BPF progs, from Yonghong Song.

12) Misc minor cleanups and fixes, from various others.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 144 deletions

diff --git a/tools/testing/selftests/bpf/test_libbpf_open.c b/tools/testing/selftests/bpf/test_libbpf_open.c
deleted file mode 100644
index 9e9db202d218..000000000000
--- a/tools/testing/selftests/bpf/test_libbpf_open.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0
- * Copyright (c) 2018 Jesper Dangaard Brouer, Red Hat Inc.
- */
-static const char *__doc__ =
-	"Libbpf test program for loading BPF ELF object files";
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdarg.h>
-#include <bpf/libbpf.h>
-#include <getopt.h>
-
-#include "bpf_rlimit.h"
-
-static const struct option long_options[] = {
-	{"help",	no_argument,		NULL, 'h' },
-	{"debug",	no_argument,		NULL, 'D' },
-	{"quiet",	no_argument,		NULL, 'q' },
-	{0, 0, NULL,  0 }
-};
-
-static void usage(char *argv[])
-{
-	int i;
-
-	printf("\nDOCUMENTATION:\n%s\n\n", __doc__);
-	printf(" Usage: %s (options-see-below) BPF_FILE\n", argv[0]);
-	printf(" Listing options:\n");
-	for (i = 0; long_options[i].name != 0; i++) {
-		printf(" --%-12s", long_options[i].name);
-		printf(" short-option: -%c",
-		       long_options[i].val);
-		printf("\n");
-	}
-	printf("\n");
-}
-
-static bool debug = 0;
-static int libbpf_debug_print(enum libbpf_print_level level,
-			      const char *fmt, va_list args)
-{
-	if (level == LIBBPF_DEBUG && !debug)
-		return 0;
-
-	fprintf(stderr, "[%d] ", level);
-	return vfprintf(stderr, fmt, args);
-}
-
-#define EXIT_FAIL_LIBBPF EXIT_FAILURE
-#define EXIT_FAIL_OPTION 2
-
-int test_walk_progs(struct bpf_object *obj, bool verbose)
-{
-	struct bpf_program *prog;
-	int cnt = 0;
-
-	bpf_object__for_each_program(prog, obj) {
-		cnt++;
-		if (verbose)
-			printf("Prog (count:%d) section_name: %s\n", cnt,
-			       bpf_program__title(prog, false));
-	}
-	return 0;
-}
-
-int test_walk_maps(struct bpf_object *obj, bool verbose)
-{
-	struct bpf_map *map;
-	int cnt = 0;
-
-	bpf_object__for_each_map(map, obj) {
-		cnt++;
-		if (verbose)
-			printf("Map (count:%d) name: %s\n", cnt,
-			       bpf_map__name(map));
-	}
-	return 0;
-}
-
-int test_open_file(char *filename, bool verbose)
-{
-	struct bpf_object *bpfobj = NULL;
-	long err;
-
-	if (verbose)
-		printf("Open BPF ELF-file with libbpf: %s\n", filename);
-
-	/* Load BPF ELF object file and check for errors */
-	bpfobj = bpf_object__open(filename);
-	err = libbpf_get_error(bpfobj);
-	if (err) {
-		char err_buf[128];
-		libbpf_strerror(err, err_buf, sizeof(err_buf));
-		if (verbose)
-			printf("Unable to load eBPF objects in file '%s': %s\n",
-			       filename, err_buf);
-		return EXIT_FAIL_LIBBPF;
-	}
-	test_walk_progs(bpfobj, verbose);
-	test_walk_maps(bpfobj, verbose);
-
-	if (verbose)
-		printf("Close BPF ELF-file with libbpf: %s\n",
-		       bpf_object__name(bpfobj));
-	bpf_object__close(bpfobj);
-
-	return 0;
-}
-
-int main(int argc, char **argv)
-{
-	char filename[1024] = { 0 };
-	bool verbose = 1;
-	int longindex = 0;
-	int opt;
-
-	libbpf_set_print(libbpf_debug_print);
-
-	/* Parse commands line args */
-	while ((opt = getopt_long(argc, argv, "hDq",
-				  long_options, &longindex)) != -1) {
-		switch (opt) {
-		case 'D':
-			debug = 1;
-			break;
-		case 'q': /* Use in scripting mode */
-			verbose = 0;
-			break;
-		case 'h':
-		default:
-			usage(argv);
-			return EXIT_FAIL_OPTION;
-		}
-	}
-	if (optind >= argc) {
-		usage(argv);
-		printf("ERROR: Expected BPF_FILE argument after options\n");
-		return EXIT_FAIL_OPTION;
-	}
-	snprintf(filename, sizeof(filename), "%s", argv[optind]);
-
-	return test_open_file(filename, verbose);
-}