diff options
Diffstat (limited to 'kernel/bpf/preload/iterators/iterators.c')
-rw-r--r-- | kernel/bpf/preload/iterators/iterators.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/kernel/bpf/preload/iterators/iterators.c b/kernel/bpf/preload/iterators/iterators.c deleted file mode 100644 index 5d872a705470..000000000000 --- a/kernel/bpf/preload/iterators/iterators.c +++ /dev/null @@ -1,94 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (c) 2020 Facebook */ -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/resource.h> -#include <bpf/libbpf.h> -#include <bpf/bpf.h> -#include <sys/mount.h> -#include "iterators.skel.h" -#include "bpf_preload_common.h" - -int to_kernel = -1; -int from_kernel = 0; - -static int send_link_to_kernel(struct bpf_link *link, const char *link_name) -{ - struct bpf_preload_info obj = {}; - struct bpf_link_info info = {}; - __u32 info_len = sizeof(info); - int err; - - err = bpf_obj_get_info_by_fd(bpf_link__fd(link), &info, &info_len); - if (err) - return err; - obj.link_id = info.id; - if (strlen(link_name) >= sizeof(obj.link_name)) - return -E2BIG; - strcpy(obj.link_name, link_name); - if (write(to_kernel, &obj, sizeof(obj)) != sizeof(obj)) - return -EPIPE; - return 0; -} - -int main(int argc, char **argv) -{ - struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY }; - struct iterators_bpf *skel; - int err, magic; - int debug_fd; - - debug_fd = open("/dev/console", O_WRONLY | O_NOCTTY | O_CLOEXEC); - if (debug_fd < 0) - return 1; - to_kernel = dup(1); - close(1); - dup(debug_fd); - /* now stdin and stderr point to /dev/console */ - - read(from_kernel, &magic, sizeof(magic)); - if (magic != BPF_PRELOAD_START) { - printf("bad start magic %d\n", magic); - return 1; - } - setrlimit(RLIMIT_MEMLOCK, &rlim); - /* libbpf opens BPF object and loads it into the kernel */ - skel = iterators_bpf__open_and_load(); - if (!skel) { - /* iterators.skel.h is little endian. - * libbpf doesn't support automatic little->big conversion - * of BPF bytecode yet. - * The program load will fail in such case. - */ - printf("Failed load could be due to wrong endianness\n"); - return 1; - } - err = iterators_bpf__attach(skel); - if (err) - goto cleanup; - - /* send two bpf_link IDs with names to the kernel */ - err = send_link_to_kernel(skel->links.dump_bpf_map, "maps.debug"); - if (err) - goto cleanup; - err = send_link_to_kernel(skel->links.dump_bpf_prog, "progs.debug"); - if (err) - goto cleanup; - - /* The kernel will proceed with pinnging the links in bpffs. - * UMD will wait on read from pipe. - */ - read(from_kernel, &magic, sizeof(magic)); - if (magic != BPF_PRELOAD_END) { - printf("bad final magic %d\n", magic); - err = -EINVAL; - } -cleanup: - iterators_bpf__destroy(skel); - - return err != 0; -} |