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-rw-r--r--tools/bpf/bpftool/Documentation/Makefile5
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-cgroup.rst4
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-map.rst3
-rw-r--r--tools/bpf/bpftool/bash-completion/bpftool72
-rw-r--r--tools/include/uapi/linux/bpf_common.h7
-rw-r--r--tools/lib/bpf/libbpf.c56
-rw-r--r--tools/testing/selftests/bpf/Makefile12
-rwxr-xr-xtools/testing/selftests/bpf/test_kmod.sh18
-rwxr-xr-xtools/testing/selftests/bpf/test_libbpf.sh49
-rw-r--r--tools/testing/selftests/bpf/test_libbpf_open.c150
-rwxr-xr-xtools/testing/selftests/bpf/test_xdp_meta.sh1
-rwxr-xr-xtools/testing/selftests/bpf/test_xdp_redirect.sh2
12 files changed, 351 insertions, 28 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
}

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