diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/bpf/bpftool/Documentation/Makefile | 5 | ||||
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-cgroup.rst | 4 | ||||
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-map.rst | 3 | ||||
| -rw-r--r-- | tools/bpf/bpftool/bash-completion/bpftool | 72 | ||||
| -rw-r--r-- | tools/include/uapi/linux/bpf_common.h | 7 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 56 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/Makefile | 12 | ||||
| -rwxr-xr-x | tools/testing/selftests/bpf/test_kmod.sh | 18 | ||||
| -rwxr-xr-x | tools/testing/selftests/bpf/test_libbpf.sh | 49 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/test_libbpf_open.c | 150 | ||||
| -rwxr-xr-x | tools/testing/selftests/bpf/test_xdp_meta.sh | 1 | ||||
| -rwxr-xr-x | tools/testing/selftests/bpf/test_xdp_redirect.sh | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/net/reuseport_bpf.c | 21 |
13 files changed, 371 insertions, 29 deletions
diff --git a/tools/bpf/bpftool/Documentation/Makefile b/tools/bpf/bpftool/Documentation/Makefile index c462a928e03d..a9d47c1558bb 100644 --- a/tools/bpf/bpftool/Documentation/Makefile +++ b/tools/bpf/bpftool/Documentation/Makefile @@ -23,7 +23,12 @@ DOC_MAN8 = $(addprefix $(OUTPUT),$(_DOC_MAN8)) man: man8 man8: $(DOC_MAN8) +RST2MAN_DEP := $(shell command -v rst2man 2>/dev/null) + $(OUTPUT)%.8: %.rst +ifndef RST2MAN_DEP + $(error "rst2man not found, but required to generate man pages") +endif $(QUIET_GEN)rst2man $< > $@ clean: diff --git a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst index 2fe2a1bdbe3e..0e4e923235b6 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst @@ -26,8 +26,8 @@ MAP COMMANDS | **bpftool** **cgroup help** | | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } -| *ATTACH_TYPE* := { *ingress* | *egress* | *sock_create* | *sock_ops* | *device* } -| *ATTACH_FLAGS* := { *multi* | *override* } +| *ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** } +| *ATTACH_FLAGS* := { **multi** | **override** } DESCRIPTION =========== diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst index 0ab32b312aec..457e868bd32f 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-map.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst @@ -31,7 +31,8 @@ MAP COMMANDS | **bpftool** **map help** | | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* } -| *VALUE* := { *BYTES* | *MAP* | *PROGRAM* } +| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } +| *VALUE* := { *BYTES* | *MAP* | *PROG* } | *UPDATE_FLAGS* := { **any** | **exist** | **noexist** } DESCRIPTION diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool index 0137866bb8f6..08719c54a614 100644 --- a/tools/bpf/bpftool/bash-completion/bpftool +++ b/tools/bpf/bpftool/bash-completion/bpftool @@ -52,16 +52,24 @@ _bpftool_once_attr() done } -# Takes a list of words in argument; adds them all to COMPREPLY if none of them -# is already present on the command line. Returns no value. -_bpftool_one_of_list() +# Takes a list of words as argument; if any of those words is present on the +# command line, return 0. Otherwise, return 1. +_bpftool_search_list() { local w idx for w in $*; do for (( idx=3; idx < ${#words[@]}-1; idx++ )); do - [[ $w == ${words[idx]} ]] && return 1 + [[ $w == ${words[idx]} ]] && return 0 done done + return 1 +} + +# Takes a list of words in argument; adds them all to COMPREPLY if none of them +# is already present on the command line. Returns no value. +_bpftool_one_of_list() +{ + _bpftool_search_list $* && return 1 COMPREPLY+=( $( compgen -W "$*" -- "$cur" ) ) } @@ -230,10 +238,14 @@ _bpftool() fi return 0 ;; + load) + _filedir + return 0 + ;; *) [[ $prev == $object ]] && \ - COMPREPLY=( $( compgen -W 'dump help pin show list' -- \ - "$cur" ) ) + COMPREPLY=( $( compgen -W 'dump help pin load \ + show list' -- "$cur" ) ) ;; esac ;; @@ -347,6 +359,54 @@ _bpftool() ;; esac ;; + cgroup) + case $command in + show|list) + _filedir + return 0 + ;; + attach|detach) + local ATTACH_TYPES='ingress egress sock_create sock_ops \ + device' + local ATTACH_FLAGS='multi override' + local PROG_TYPE='id pinned tag' + case $prev in + $command) + _filedir + return 0 + ;; + ingress|egress|sock_create|sock_ops|device) + COMPREPLY=( $( compgen -W "$PROG_TYPE" -- \ + "$cur" ) ) + return 0 + ;; + id) + _bpftool_get_prog_ids + return 0 + ;; + *) + if ! _bpftool_search_list "$ATTACH_TYPES"; then + COMPREPLY=( $( compgen -W "$ATTACH_TYPES" -- \ + "$cur" ) ) + elif [[ "$command" == "attach" ]]; then + # We have an attach type on the command line, + # but it is not the previous word, or + # "id|pinned|tag" (we already checked for + # that). This should only leave the case when + # we need attach flags for "attach" commamnd. + _bpftool_one_of_list "$ATTACH_FLAGS" + fi + return 0 + ;; + esac + ;; + *) + [[ $prev == $object ]] && \ + COMPREPLY=( $( compgen -W 'help attach detach \ + show list' -- "$cur" ) ) + ;; + esac + ;; esac } && complete -F _bpftool bpftool diff --git a/tools/include/uapi/linux/bpf_common.h b/tools/include/uapi/linux/bpf_common.h index 18be90725ab0..ee97668bdadb 100644 --- a/tools/include/uapi/linux/bpf_common.h +++ b/tools/include/uapi/linux/bpf_common.h @@ -15,9 +15,10 @@ /* ld/ldx fields */ #define BPF_SIZE(code) ((code) & 0x18) -#define BPF_W 0x00 -#define BPF_H 0x08 -#define BPF_B 0x10 +#define BPF_W 0x00 /* 32-bit */ +#define BPF_H 0x08 /* 16-bit */ +#define BPF_B 0x10 /* 8-bit */ +/* eBPF BPF_DW 0x18 64-bit */ #define BPF_MODE(code) ((code) & 0xe0) #define BPF_IMM 0x00 #define BPF_ABS 0x20 diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 71ddc481f349..97073d649c1a 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -319,8 +319,8 @@ bpf_program__init(void *data, size_t size, char *section_name, int idx, prog->section_name = strdup(section_name); if (!prog->section_name) { - pr_warning("failed to alloc name for prog under section %s\n", - section_name); + pr_warning("failed to alloc name for prog under section(%d) %s\n", + idx, section_name); goto errout; } @@ -742,6 +742,24 @@ bpf_object__init_maps(struct bpf_object *obj) return 0; } +static bool section_have_execinstr(struct bpf_object *obj, int idx) +{ + Elf_Scn *scn; + GElf_Shdr sh; + + scn = elf_getscn(obj->efile.elf, idx); + if (!scn) + return false; + + if (gelf_getshdr(scn, &sh) != &sh) + return false; + + if (sh.sh_flags & SHF_EXECINSTR) + return true; + + return false; +} + static int bpf_object__elf_collect(struct bpf_object *obj) { Elf *elf = obj->efile.elf; @@ -763,29 +781,29 @@ static int bpf_object__elf_collect(struct bpf_object *obj) idx++; if (gelf_getshdr(scn, &sh) != &sh) { - pr_warning("failed to get section header from %s\n", - obj->path); + pr_warning("failed to get section(%d) header from %s\n", + idx, obj->path); err = -LIBBPF_ERRNO__FORMAT; goto out; } name = elf_strptr(elf, ep->e_shstrndx, sh.sh_name); if (!name) { - pr_warning("failed to get section name from %s\n", - obj->path); + pr_warning("failed to get section(%d) name from %s\n", + idx, obj->path); err = -LIBBPF_ERRNO__FORMAT; goto out; } data = elf_getdata(scn, 0); if (!data) { - pr_warning("failed to get section data from %s(%s)\n", - name, obj->path); + pr_warning("failed to get section(%d) data from %s(%s)\n", + idx, name, obj->path); err = -LIBBPF_ERRNO__FORMAT; goto out; } - pr_debug("section %s, size %ld, link %d, flags %lx, type=%d\n", - name, (unsigned long)data->d_size, + pr_debug("section(%d) %s, size %ld, link %d, flags %lx, type=%d\n", + idx, name, (unsigned long)data->d_size, (int)sh.sh_link, (unsigned long)sh.sh_flags, (int)sh.sh_type); @@ -825,6 +843,14 @@ static int bpf_object__elf_collect(struct bpf_object *obj) } else if (sh.sh_type == SHT_REL) { void *reloc = obj->efile.reloc; int nr_reloc = obj->efile.nr_reloc + 1; + int sec = sh.sh_info; /* points to other section */ + + /* Only do relo for section with exec instructions */ + if (!section_have_execinstr(obj, sec)) { + pr_debug("skip relo %s(%d) for section(%d)\n", + name, idx, sec); + continue; + } reloc = realloc(reloc, sizeof(*obj->efile.reloc) * nr_reloc); @@ -840,6 +866,8 @@ static int bpf_object__elf_collect(struct bpf_object *obj) obj->efile.reloc[n].shdr = sh; obj->efile.reloc[n].data = data; } + } else { + pr_debug("skip section(%d) %s\n", idx, name); } if (err) goto out; @@ -1119,8 +1147,7 @@ static int bpf_object__collect_reloc(struct bpf_object *obj) prog = bpf_object__find_prog_by_idx(obj, idx); if (!prog) { - pr_warning("relocation failed: no %d section\n", - idx); + pr_warning("relocation failed: no section(%d)\n", idx); return -LIBBPF_ERRNO__RELOC; } @@ -1816,12 +1843,17 @@ static const struct { BPF_PROG_SEC("socket", BPF_PROG_TYPE_SOCKET_FILTER), BPF_PROG_SEC("kprobe/", BPF_PROG_TYPE_KPROBE), BPF_PROG_SEC("kretprobe/", BPF_PROG_TYPE_KPROBE), + BPF_PROG_SEC("classifier", BPF_PROG_TYPE_SCHED_CLS), + BPF_PROG_SEC("action", BPF_PROG_TYPE_SCHED_ACT), BPF_PROG_SEC("tracepoint/", BPF_PROG_TYPE_TRACEPOINT), BPF_PROG_SEC("xdp", BPF_PROG_TYPE_XDP), BPF_PROG_SEC("perf_event", BPF_PROG_TYPE_PERF_EVENT), BPF_PROG_SEC("cgroup/skb", BPF_PROG_TYPE_CGROUP_SKB), BPF_PROG_SEC("cgroup/sock", BPF_PROG_TYPE_CGROUP_SOCK), BPF_PROG_SEC("cgroup/dev", BPF_PROG_TYPE_CGROUP_DEVICE), + BPF_PROG_SEC("lwt_in", BPF_PROG_TYPE_LWT_IN), + BPF_PROG_SEC("lwt_out", BPF_PROG_TYPE_LWT_OUT), + BPF_PROG_SEC("lwt_xmit", BPF_PROG_TYPE_LWT_XMIT), BPF_PROG_SEC("sockops", BPF_PROG_TYPE_SOCK_OPS), BPF_PROG_SEC("sk_skb", BPF_PROG_TYPE_SK_SKB), }; diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 566d6adc172a..5c43c187f27c 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -13,6 +13,7 @@ endif CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include LDLIBS += -lcap -lelf -lrt -lpthread +# Order correspond to 'make run_tests' order TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \ test_align test_verifier_log test_dev_cgroup test_tcpbpf_user @@ -22,15 +23,24 @@ TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \ sample_map_ret0.o test_tcpbpf_kern.o -TEST_PROGS := test_kmod.sh test_xdp_redirect.sh test_xdp_meta.sh \ +# Order correspond to 'make run_tests' order +TEST_PROGS := test_kmod.sh \ + test_libbpf.sh \ + test_xdp_redirect.sh \ + test_xdp_meta.sh \ test_offload.py +# Compile but not part of 'make run_tests' +TEST_GEN_PROGS_EXTENDED = test_libbpf_open + include ../lib.mk BPFOBJ := $(OUTPUT)/libbpf.a cgroup_helpers.c $(TEST_GEN_PROGS): $(BPFOBJ) +$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a + .PHONY: force # force a rebuild of BPFOBJ when its dependencies are updated diff --git a/tools/testing/selftests/bpf/test_kmod.sh b/tools/testing/selftests/bpf/test_kmod.sh index ed4774d8d6ed..35669ccd4d23 100755 --- a/tools/testing/selftests/bpf/test_kmod.sh +++ b/tools/testing/selftests/bpf/test_kmod.sh @@ -10,9 +10,21 @@ test_run() echo "[ JIT enabled:$1 hardened:$2 ]" dmesg -C - insmod $SRC_TREE/lib/test_bpf.ko 2> /dev/null - if [ $? -ne 0 ]; then - rc=1 + if [ -f ${SRC_TREE}/lib/test_bpf.ko ]; then + insmod ${SRC_TREE}/lib/test_bpf.ko 2> /dev/null + if [ $? -ne 0 ]; then + rc=1 + fi + else + # Use modprobe dry run to check for missing test_bpf module + if ! /sbin/modprobe -q -n test_bpf; then + echo "test_bpf: [SKIP]" + elif /sbin/modprobe -q test_bpf; then + echo "test_bpf: ok" + else + echo "test_bpf: [FAIL]" + rc=1 + fi fi rmmod test_bpf 2> /dev/null dmesg | grep FAIL diff --git a/tools/testing/selftests/bpf/test_libbpf.sh b/tools/testing/selftests/bpf/test_libbpf.sh new file mode 100755 index 000000000000..d97dc914cd49 --- /dev/null +++ b/tools/testing/selftests/bpf/test_libbpf.sh @@ -0,0 +1,49 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +export TESTNAME=test_libbpf + +# Determine selftest success via shell exit code +exit_handler() +{ + if (( $? == 0 )); then + echo "selftests: $TESTNAME [PASS]"; + else + echo "$TESTNAME: failed at file $LAST_LOADED" 1>&2 + echo "selftests: $TESTNAME [FAILED]"; + fi +} + +libbpf_open_file() +{ + LAST_LOADED=$1 + if [ -n "$VERBOSE" ]; then + ./test_libbpf_open $1 + else + ./test_libbpf_open --quiet $1 + fi +} + +# Exit script immediately (well catched by trap handler) if any +# program/thing exits with a non-zero status. +set -e + +# (Use 'trap -l' to list meaning of numbers) +trap exit_handler 0 2 3 6 9 + +libbpf_open_file test_l4lb.o + +# TODO: fix libbpf to load noinline functions +# [warning] libbpf: incorrect bpf_call opcode +#libbpf_open_file test_l4lb_noinline.o + +# TODO: fix test_xdp_meta.c to load with libbpf +# [warning] libbpf: test_xdp_meta.o doesn't provide kernel version +#libbpf_open_file test_xdp_meta.o + +# TODO: fix libbpf to handle .eh_frame +# [warning] libbpf: relocation failed: no section(10) +#libbpf_open_file ../../../../samples/bpf/tracex3_kern.o + +# Success +exit 0 diff --git a/tools/testing/selftests/bpf/test_libbpf_open.c b/tools/testing/selftests/bpf/test_libbpf_open.c new file mode 100644 index 000000000000..8fcd1c076add --- /dev/null +++ b/tools/testing/selftests/bpf/test_libbpf_open.c @@ -0,0 +1,150 @@ +/* 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> + +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"); +} + +#define DEFINE_PRINT_FN(name, enabled) \ +static int libbpf_##name(const char *fmt, ...) \ +{ \ + va_list args; \ + int ret; \ + \ + va_start(args, fmt); \ + if (enabled) { \ + fprintf(stderr, "[" #name "] "); \ + ret = vfprintf(stderr, fmt, args); \ + } \ + va_end(args); \ + return ret; \ +} +DEFINE_PRINT_FN(warning, 1) +DEFINE_PRINT_FN(info, 1) +DEFINE_PRINT_FN(debug, 1) + +#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_map__for_each(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_warning, libbpf_info, NULL); + + /* Parse commands line args */ + while ((opt = getopt_long(argc, argv, "hDq", + long_options, &longindex)) != -1) { + switch (opt) { + case 'D': + libbpf_set_print(libbpf_warning, libbpf_info, + libbpf_debug); + 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); +} diff --git a/tools/testing/selftests/bpf/test_xdp_meta.sh b/tools/testing/selftests/bpf/test_xdp_meta.sh index 307aa856cee3..637fcf4fe4e3 100755 --- a/tools/testing/selftests/bpf/test_xdp_meta.sh +++ b/tools/testing/selftests/bpf/test_xdp_meta.sh @@ -9,6 +9,7 @@ cleanup() fi set +e + ip link del veth1 2> /dev/null ip netns del ns1 2> /dev/null ip netns del ns2 2> /dev/null } diff --git a/tools/testing/selftests/bpf/test_xdp_redirect.sh b/tools/testing/selftests/bpf/test_xdp_redirect.sh index 344a3656dea6..c4b17e08d431 100755 --- a/tools/testing/selftests/bpf/test_xdp_redirect.sh +++ b/tools/testing/selftests/bpf/test_xdp_redirect.sh @@ -19,6 +19,8 @@ cleanup() fi set +e + ip link del veth1 2> /dev/null + ip link del veth2 2> /dev/null ip netns del ns1 2> /dev/null ip netns del ns2 2> /dev/null } diff --git a/tools/testing/selftests/net/reuseport_bpf.c b/tools/testing/selftests/net/reuseport_bpf.c index 4a8217448f20..cad14cd0ea92 100644 --- a/tools/testing/selftests/net/reuseport_bpf.c +++ b/tools/testing/selftests/net/reuseport_bpf.c @@ -21,6 +21,7 @@ #include <sys/epoll.h> #include <sys/types.h> #include <sys/socket.h> +#include <sys/resource.h> #include <unistd.h> #ifndef ARRAY_SIZE @@ -190,11 +191,14 @@ static void send_from(struct test_params p, uint16_t sport, char *buf, struct sockaddr * const saddr = new_any_sockaddr(p.send_family, sport); struct sockaddr * const daddr = new_loopback_sockaddr(p.send_family, p.recv_port); - const int fd = socket(p.send_family, p.protocol, 0); + const int fd = socket(p.send_family, p.protocol, 0), one = 1; if (fd < 0) error(1, errno, "failed to create send socket"); + if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) + error(1, errno, "failed to set reuseaddr"); + if (bind(fd, saddr, sockaddr_size())) error(1, errno, "failed to bind send socket"); @@ -433,6 +437,21 @@ void enable_fastopen(void) } } +static struct rlimit rlim_old, rlim_new; + +static __attribute__((constructor)) void main_ctor(void) +{ + getrlimit(RLIMIT_MEMLOCK, &rlim_old); + rlim_new.rlim_cur = rlim_old.rlim_cur + (1UL << 20); + rlim_new.rlim_max = rlim_old.rlim_max + (1UL << 20); + setrlimit(RLIMIT_MEMLOCK, &rlim_new); +} + +static __attribute__((destructor)) void main_dtor(void) +{ + setrlimit(RLIMIT_MEMLOCK, &rlim_old); +} + int main(void) { fprintf(stderr, "---- IPv4 UDP ----\n"); |