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-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-perf.rst81
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool.rst5
-rw-r--r--tools/bpf/bpftool/bash-completion/bpftool9
-rw-r--r--tools/bpf/bpftool/main.c3
-rw-r--r--tools/bpf/bpftool/main.h1
-rw-r--r--tools/bpf/bpftool/perf.c246
-rw-r--r--tools/bpf/bpftool/prog.c97
-rw-r--r--tools/bpf/bpftool/xlated_dumper.c14
-rw-r--r--tools/bpf/bpftool/xlated_dumper.h3
-rw-r--r--tools/include/uapi/linux/bpf.h143
-rw-r--r--tools/include/uapi/linux/btf.h37
-rw-r--r--tools/lib/bpf/bpf.c27
-rw-r--r--tools/lib/bpf/bpf.h7
-rw-r--r--tools/lib/bpf/btf.c5
-rw-r--r--tools/lib/bpf/libbpf.c43
-rw-r--r--tools/lib/bpf/libbpf.h4
-rw-r--r--tools/testing/selftests/bpf/Makefile16
-rw-r--r--tools/testing/selftests/bpf/bpf_helpers.h12
-rw-r--r--tools/testing/selftests/bpf/test_btf.c521
-rw-r--r--tools/testing/selftests/bpf/test_lwt_seg6local.c437
-rwxr-xr-xtools/testing/selftests/bpf/test_lwt_seg6local.sh140
-rw-r--r--tools/testing/selftests/bpf/test_progs.c158
-rw-r--r--tools/testing/selftests/bpf/test_verifier.c115
-rw-r--r--tools/testing/selftests/bpf/trace_helpers.c12
-rw-r--r--tools/testing/selftests/bpf/trace_helpers.h1
25 files changed, 1978 insertions, 159 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-perf.rst b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
new file mode 100644
index 000000000000..e3eb0eab7641
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
@@ -0,0 +1,81 @@
+================
+bpftool-perf
+================
+-------------------------------------------------------------------------------
+tool for inspection of perf related bpf prog attachments
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+ **bpftool** [*OPTIONS*] **perf** *COMMAND*
+
+ *OPTIONS* := { [{ **-j** | **--json** }] [{ **-p** | **--pretty** }] }
+
+ *COMMANDS* :=
+ { **show** | **list** | **help** }
+
+PERF COMMANDS
+=============
+
+| **bpftool** **perf { show | list }**
+| **bpftool** **perf help**
+
+DESCRIPTION
+===========
+ **bpftool perf { show | list }**
+ List all raw_tracepoint, tracepoint, kprobe attachment in the system.
+
+ Output will start with process id and file descriptor in that process,
+ followed by bpf program id, attachment information, and attachment point.
+ The attachment point for raw_tracepoint/tracepoint is the trace probe name.
+ The attachment point for k[ret]probe is either symbol name and offset,
+ or a kernel virtual address.
+ The attachment point for u[ret]probe is the file name and the file offset.
+
+ **bpftool perf help**
+ Print short help message.
+
+OPTIONS
+=======
+ -h, --help
+ Print short generic help message (similar to **bpftool help**).
+
+ -v, --version
+ Print version number (similar to **bpftool version**).
+
+ -j, --json
+ Generate JSON output. For commands that cannot produce JSON, this
+ option has no effect.
+
+ -p, --pretty
+ Generate human-readable JSON output. Implies **-j**.
+
+EXAMPLES
+========
+
+| **# bpftool perf**
+
+::
+
+ pid 21711 fd 5: prog_id 5 kprobe func __x64_sys_write offset 0
+ pid 21765 fd 5: prog_id 7 kretprobe func __x64_sys_nanosleep offset 0
+ pid 21767 fd 5: prog_id 8 tracepoint sys_enter_nanosleep
+ pid 21800 fd 5: prog_id 9 uprobe filename /home/yhs/a.out offset 1159
+
+|
+| **# bpftool -j perf**
+
+::
+
+ [{"pid":21711,"fd":5,"prog_id":5,"fd_type":"kprobe","func":"__x64_sys_write","offset":0}, \
+ {"pid":21765,"fd":5,"prog_id":7,"fd_type":"kretprobe","func":"__x64_sys_nanosleep","offset":0}, \
+ {"pid":21767,"fd":5,"prog_id":8,"fd_type":"tracepoint","tracepoint":"sys_enter_nanosleep"}, \
+ {"pid":21800,"fd":5,"prog_id":9,"fd_type":"uprobe","filename":"/home/yhs/a.out","offset":1159}]
+
+
+SEE ALSO
+========
+ **bpftool**\ (8), **bpftool-prog**\ (8), **bpftool-map**\ (8)
diff --git a/tools/bpf/bpftool/Documentation/bpftool.rst b/tools/bpf/bpftool/Documentation/bpftool.rst
index 564cb0d9692b..b6f5d560460d 100644
--- a/tools/bpf/bpftool/Documentation/bpftool.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool.rst
@@ -16,7 +16,7 @@ SYNOPSIS
**bpftool** **version**
- *OBJECT* := { **map** | **program** | **cgroup** }
+ *OBJECT* := { **map** | **program** | **cgroup** | **perf** }
*OPTIONS* := { { **-V** | **--version** } | { **-h** | **--help** }
| { **-j** | **--json** } [{ **-p** | **--pretty** }] }
@@ -30,6 +30,8 @@ SYNOPSIS
*CGROUP-COMMANDS* := { **show** | **list** | **attach** | **detach** | **help** }
+ *PERF-COMMANDS* := { **show** | **list** | **help** }
+
DESCRIPTION
===========
*bpftool* allows for inspection and simple modification of BPF objects
@@ -56,3 +58,4 @@ OPTIONS
SEE ALSO
========
**bpftool-map**\ (8), **bpftool-prog**\ (8), **bpftool-cgroup**\ (8)
+ **bpftool-perf**\ (8)
diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool
index b301c9b315f1..7bc198d60de2 100644
--- a/tools/bpf/bpftool/bash-completion/bpftool
+++ b/tools/bpf/bpftool/bash-completion/bpftool
@@ -448,6 +448,15 @@ _bpftool()
;;
esac
;;
+ perf)
+ case $command in
+ *)
+ [[ $prev == $object ]] && \
+ COMPREPLY=( $( compgen -W 'help \
+ show list' -- "$cur" ) )
+ ;;
+ esac
+ ;;
esac
} &&
complete -F _bpftool bpftool
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 1ec852d21d44..eea7f14355f3 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -87,7 +87,7 @@ static int do_help(int argc, char **argv)
" %s batch file FILE\n"
" %s version\n"
"\n"
- " OBJECT := { prog | map | cgroup }\n"
+ " OBJECT := { prog | map | cgroup | perf }\n"
" " HELP_SPEC_OPTIONS "\n"
"",
bin_name, bin_name, bin_name);
@@ -216,6 +216,7 @@ static const struct cmd cmds[] = {
{ "prog", do_prog },
{ "map", do_map },
{ "cgroup", do_cgroup },
+ { "perf", do_perf },
{ "version", do_version },
{ 0 }
};
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h
index 6173cd997e7a..63fdb310b9a4 100644
--- a/tools/bpf/bpftool/main.h
+++ b/tools/bpf/bpftool/main.h
@@ -119,6 +119,7 @@ int do_prog(int argc, char **arg);
int do_map(int argc, char **arg);
int do_event_pipe(int argc, char **argv);
int do_cgroup(int argc, char **arg);
+int do_perf(int argc, char **arg);
int prog_parse_fd(int *argc, char ***argv);
int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len);
diff --git a/tools/bpf/bpftool/perf.c b/tools/bpf/bpftool/perf.c
new file mode 100644
index 000000000000..ac6b1a12c9b7
--- /dev/null
+++ b/tools/bpf/bpftool/perf.c
@@ -0,0 +1,246 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (C) 2018 Facebook
+// Author: Yonghong Song <yhs@fb.com>
+
+#define _GNU_SOURCE
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <ftw.h>
+
+#include <bpf.h>
+
+#include "main.h"
+
+/* 0: undecided, 1: supported, 2: not supported */
+static int perf_query_supported;
+static bool has_perf_query_support(void)
+{
+ __u64 probe_offset, probe_addr;
+ __u32 len, prog_id, fd_type;
+ char buf[256];
+ int fd;
+
+ if (perf_query_supported)
+ goto out;
+
+ fd = open(bin_name, O_RDONLY);
+ if (fd < 0) {
+ p_err("perf_query_support: %s", strerror(errno));
+ goto out;
+ }
+
+ /* the following query will fail as no bpf attachment,
+ * the expected errno is ENOTSUPP
+ */
+ errno = 0;
+ len = sizeof(buf);
+ bpf_task_fd_query(getpid(), fd, 0, buf, &len, &prog_id,
+ &fd_type, &probe_offset, &probe_addr);
+
+ if (errno == 524 /* ENOTSUPP */) {
+ perf_query_supported = 1;
+ goto close_fd;
+ }
+
+ perf_query_supported = 2;
+ p_err("perf_query_support: %s", strerror(errno));
+ fprintf(stderr,
+ "HINT: non root or kernel doesn't support TASK_FD_QUERY\n");
+
+close_fd:
+ close(fd);
+out:
+ return perf_query_supported == 1;
+}
+
+static void print_perf_json(int pid, int fd, __u32 prog_id, __u32 fd_type,
+ char *buf, __u64 probe_offset, __u64 probe_addr)
+{
+ jsonw_start_object(json_wtr);
+ jsonw_int_field(json_wtr, "pid", pid);
+ jsonw_int_field(json_wtr, "fd", fd);
+ jsonw_uint_field(json_wtr, "prog_id", prog_id);
+ switch (fd_type) {
+ case BPF_FD_TYPE_RAW_TRACEPOINT:
+ jsonw_string_field(json_wtr, "fd_type", "raw_tracepoint");
+ jsonw_string_field(json_wtr, "tracepoint", buf);
+ break;
+ case BPF_FD_TYPE_TRACEPOINT:
+ jsonw_string_field(json_wtr, "fd_type", "tracepoint");
+ jsonw_string_field(json_wtr, "tracepoint", buf);
+ break;
+ case BPF_FD_TYPE_KPROBE:
+ jsonw_string_field(json_wtr, "fd_type", "kprobe");
+ if (buf[0] != '\0') {
+ jsonw_string_field(json_wtr, "func", buf);
+ jsonw_lluint_field(json_wtr, "offset", probe_offset);
+ } else {
+ jsonw_lluint_field(json_wtr, "addr", probe_addr);
+ }
+ break;
+ case BPF_FD_TYPE_KRETPROBE:
+ jsonw_string_field(json_wtr, "fd_type", "kretprobe");
+ if (buf[0] != '\0') {
+ jsonw_string_field(json_wtr, "func", buf);
+ jsonw_lluint_field(json_wtr, "offset", probe_offset);
+ } else {
+ jsonw_lluint_field(json_wtr, "addr", probe_addr);
+ }
+ break;
+ case BPF_FD_TYPE_UPROBE:
+ jsonw_string_field(json_wtr, "fd_type", "uprobe");
+ jsonw_string_field(json_wtr, "filename", buf);
+ jsonw_lluint_field(json_wtr, "offset", probe_offset);
+ break;
+ case BPF_FD_TYPE_URETPROBE:
+ jsonw_string_field(json_wtr, "fd_type", "uretprobe");
+ jsonw_string_field(json_wtr, "filename", buf);
+ jsonw_lluint_field(json_wtr, "offset", probe_offset);
+ break;
+ }
+ jsonw_end_object(json_wtr);
+}
+
+static void print_perf_plain(int pid, int fd, __u32 prog_id, __u32 fd_type,
+ char *buf, __u64 probe_offset, __u64 probe_addr)
+{
+ printf("pid %d fd %d: prog_id %u ", pid, fd, prog_id);
+ switch (fd_type) {
+ case BPF_FD_TYPE_RAW_TRACEPOINT:
+ printf("raw_tracepoint %s\n", buf);
+ break;
+ case BPF_FD_TYPE_TRACEPOINT:
+ printf("tracepoint %s\n", buf);
+ break;
+ case BPF_FD_TYPE_KPROBE:
+ if (buf[0] != '\0')
+ printf("kprobe func %s offset %llu\n", buf,
+ probe_offset);
+ else
+ printf("kprobe addr %llu\n", probe_addr);
+ break;
+ case BPF_FD_TYPE_KRETPROBE:
+ if (buf[0] != '\0')
+ printf("kretprobe func %s offset %llu\n", buf,
+ probe_offset);
+ else
+ printf("kretprobe addr %llu\n", probe_addr);
+ break;
+ case BPF_FD_TYPE_UPROBE:
+ printf("uprobe filename %s offset %llu\n", buf, probe_offset);
+ break;
+ case BPF_FD_TYPE_URETPROBE:
+ printf("uretprobe filename %s offset %llu\n", buf,
+ probe_offset);
+ break;
+ }
+}
+
+static int show_proc(const char *fpath, const struct stat *sb,
+ int tflag, struct FTW *ftwbuf)
+{
+ __u64 probe_offset, probe_addr;
+ __u32 len, prog_id, fd_type;
+ int err, pid = 0, fd = 0;
+ const char *pch;
+ char buf[4096];
+
+ /* prefix always /proc */
+ pch = fpath + 5;
+ if (*pch == '\0')
+ return 0;
+
+ /* pid should be all numbers */
+ pch++;
+ while (isdigit(*pch)) {
+ pid = pid * 10 + *pch - '0';
+ pch++;
+ }
+ if (*pch == '\0')
+ return 0;
+ if (*pch != '/')
+ return FTW_SKIP_SUBTREE;
+
+ /* check /proc/<pid>/fd directory */
+ pch++;
+ if (strncmp(pch, "fd", 2))
+ return FTW_SKIP_SUBTREE;
+ pch += 2;
+ if (*pch == '\0')
+ return 0;
+ if (*pch != '/')
+ return FTW_SKIP_SUBTREE;
+
+ /* check /proc/<pid>/fd/<fd_num> */
+ pch++;
+ while (isdigit(*pch)) {
+ fd = fd * 10 + *pch - '0';
+ pch++;
+ }
+ if (*pch != '\0')
+ return FTW_SKIP_SUBTREE;
+
+ /* query (pid, fd) for potential perf events */
+ len = sizeof(buf);
+ err = bpf_task_fd_query(pid, fd, 0, buf, &len, &prog_id, &fd_type,
+ &probe_offset, &probe_addr);
+ if (err < 0)
+ return 0;
+
+ if (json_output)
+ print_perf_json(pid, fd, prog_id, fd_type, buf, probe_offset,
+ probe_addr);
+ else
+ print_perf_plain(pid, fd, prog_id, fd_type, buf, probe_offset,
+ probe_addr);
+
+ return 0;
+}
+
+static int do_show(int argc, char **argv)
+{
+ int flags = FTW_ACTIONRETVAL | FTW_PHYS;
+ int err = 0, nopenfd = 16;
+
+ if (!has_perf_query_support())
+ return -1;
+
+ if (json_output)
+ jsonw_start_array(json_wtr);
+ if (nftw("/proc", show_proc, nopenfd, flags) == -1) {
+ p_err("%s", strerror(errno));
+ err = -1;
+ }
+ if (json_output)
+ jsonw_end_array(json_wtr);
+
+ return err;
+}
+
+static int do_help(int argc, char **argv)
+{
+ fprintf(stderr,
+ "Usage: %s %s { show | list | help }\n"
+ "",
+ bin_name, argv[-2]);
+
+ return 0;
+}
+
+static const struct cmd cmds[] = {
+ { "show", do_show },
+ { "list", do_show },
+ { "help", do_help },
+ { 0 }
+};
+
+int do_perf(int argc, char **argv)
+{
+ return cmd_select(cmds, argc, argv, do_help);
+}
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index 9bdfdf2d3fbe..39b88e760367 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -420,7 +420,11 @@ static int do_show(int argc, char **argv)
static int do_dump(int argc, char **argv)
{
+ unsigned long *func_ksyms = NULL;
struct bpf_prog_info info = {};
+ unsigned int *func_lens = NULL;
+ unsigned int nr_func_ksyms;
+ unsigned int nr_func_lens;
struct dump_data dd = {};
__u32 len = sizeof(info);
unsigned int buf_size;
@@ -496,10 +500,34 @@ static int do_dump(int argc, char **argv)
return -1;
}
+ nr_func_ksyms = info.nr_jited_ksyms;
+ if (nr_func_ksyms) {
+ func_ksyms = malloc(nr_func_ksyms * sizeof(__u64));
+ if (!func_ksyms) {
+ p_err("mem alloc failed");
+ close(fd);
+ goto err_free;
+ }
+ }
+
+ nr_func_lens = info.nr_jited_func_lens;
+ if (nr_func_lens) {
+ func_lens = malloc(nr_func_lens * sizeof(__u32));
+ if (!func_lens) {
+ p_err("mem alloc failed");
+ close(fd);
+ goto err_free;
+ }
+ }
+
memset(&info, 0, sizeof(info));
*member_ptr = ptr_to_u64(buf);
*member_len = buf_size;
+ info.jited_ksyms = ptr_to_u64(func_ksyms);
+ info.nr_jited_ksyms = nr_func_ksyms;
+ info.jited_func_lens = ptr_to_u64(func_lens);
+ info.nr_jited_func_lens = nr_func_lens;
err = bpf_obj_get_info_by_fd(fd, &info, &len);
close(fd);
@@ -513,6 +541,16 @@ static int do_dump(int argc, char **argv)
goto err_free;
}
+ if (info.nr_jited_ksyms > nr_func_ksyms) {
+ p_err("too many addresses returned");
+ goto err_free;
+ }
+
+ if (info.nr_jited_func_lens > nr_func_lens) {
+ p_err("too many values returned");
+ goto err_free;
+ }
+
if ((member_len == &info.jited_prog_len &&
info.jited_prog_insns == 0) ||
(member_len == &info.xlated_prog_len &&
@@ -550,7 +588,57 @@ static int do_dump(int argc, char **argv)
goto err_free;
}
- disasm_print_insn(buf, *member_len, opcodes, name);
+ if (info.nr_jited_func_lens && info.jited_func_lens) {
+ struct kernel_sym *sym = NULL;
+ char sym_name[SYM_MAX_NAME];
+ unsigned char *img = buf;
+ __u64 *ksyms = NULL;
+ __u32 *lens;
+ __u32 i;
+
+ if (info.nr_jited_ksyms) {
+ kernel_syms_load(&dd);
+ ksyms = (__u64 *) info.jited_ksyms;
+ }
+
+ if (json_output)
+ jsonw_start_array(json_wtr);
+
+ lens = (__u32 *) info.jited_func_lens;
+ for (i = 0; i < info.nr_jited_func_lens; i++) {
+ if (ksyms) {
+ sym = kernel_syms_search(&dd, ksyms[i]);
+ if (sym)
+ sprintf(sym_name, "%s", sym->name);
+ else
+ sprintf(sym_name, "0x%016llx", ksyms[i]);
+ } else {
+ strcpy(sym_name, "unknown");
+ }
+
+ if (json_output) {
+ jsonw_start_object(json_wtr);
+ jsonw_name(json_wtr, "name");
+ jsonw_string(json_wtr, sym_name);
+ jsonw_name(json_wtr, "insns");
+ } else {
+ printf("%s:\n", sym_name);
+ }
+
+ disasm_print_insn(img, lens[i], opcodes, name);
+ img += lens[i];
+
+ if (json_output)
+ jsonw_end_object(json_wtr);
+ else
+ printf("\n");
+ }
+
+ if (json_output)
+ jsonw_end_array(json_wtr);
+ } else {
+ disasm_print_insn(buf, *member_len, opcodes, name);
+ }
} else if (visual) {
if (json_output)
jsonw_null(json_wtr);
@@ -558,6 +646,9 @@ static int do_dump(int argc, char **argv)
dump_xlated_cfg(buf, *member_len);
} else {
kernel_syms_load(&dd);
+ dd.nr_jited_ksyms = info.nr_jited_ksyms;
+ dd.jited_ksyms = (__u64 *) info.jited_ksyms;
+
if (json_output)
dump_xlated_json(&dd, buf, *member_len, opcodes);
else
@@ -566,10 +657,14 @@ static int do_dump(int argc, char **argv)
}
free(buf);
+ free(func_ksyms);
+ free(func_lens);
return 0;
err_free:
free(buf);
+ free(func_ksyms);
+ free(func_lens);
return -1;
}
diff --git a/tools/bpf/bpftool/xlated_dumper.c b/tools/bpf/bpftool/xlated_dumper.c
index 7a3173b76c16..b97f1da60dd1 100644
--- a/tools/bpf/bpftool/xlated_dumper.c
+++ b/tools/bpf/bpftool/xlated_dumper.c
@@ -102,8 +102,8 @@ void kernel_syms_destroy(struct dump_data *dd)
free(dd->sym_mapping);
}
-static struct kernel_sym *kernel_syms_search(struct dump_data *dd,
- unsigned long key)
+struct kernel_sym *kernel_syms_search(struct dump_data *dd,
+ unsigned long key)
{
struct kernel_sym sym = {
.address = key,
@@ -174,7 +174,11 @@ static const char *print_call_pcrel(struct dump_data *dd,
unsigned long address,
const struct bpf_insn *insn)
{
- if (sym)
+ if (!dd->nr_jited_ksyms)
+ /* Do not show address for interpreted programs */
+ snprintf(dd->scratch_buff, sizeof(dd->scratch_buff),
+ "%+d", insn->off);
+ else if (sym)
snprintf(dd->scratch_buff, sizeof(dd->scratch_buff),
"%+d#%s", insn->off, sym->name);
else
@@ -203,6 +207,10 @@ static const char *print_call(void *private_data,
unsigned long address = dd->address_call_base + insn->imm;
struct kernel_sym *sym;
+ if (insn->src_reg == BPF_PSEUDO_CALL &&
+ (__u32) insn->imm < dd->nr_jited_ksyms)
+ address = dd->jited_ksyms[insn->imm];
+
sym = kernel_syms_search(dd, address);
if (insn->src_reg == BPF_PSEUDO_CALL)
return print_call_pcrel(dd, sym, address, insn);
diff --git a/tools/bpf/bpftool/xlated_dumper.h b/tools/bpf/bpftool/xlated_dumper.h
index b34affa7ef2d..33d86e2b369b 100644
--- a/tools/bpf/bpftool/xlated_dumper.h
+++ b/tools/bpf/bpftool/xlated_dumper.h
@@ -49,11 +49,14 @@ struct dump_data {
unsigned long address_call_base;
struct kernel_sym *sym_mapping;
__u32 sym_count;
+ __u64 *jited_ksyms;
+ __u32 nr_jited_ksyms;
char scratch_buff[SYM_MAX_NAME + 8];
};
void kernel_syms_load(struct dump_data *dd);
void kernel_syms_destroy(struct dump_data *dd);
+struct kernel_sym *kernel_syms_search(struct dump_data *dd, unsigned long key);
void dump_xlated_json(struct dump_data *dd, void *buf, unsigned int len,
bool opcodes);
void dump_xlated_plain(struct dump_data *dd, void *buf, unsigned int len,
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index d94d333a8225..9b8c6e310e9a 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -97,6 +97,7 @@ enum bpf_cmd {
BPF_RAW_TRACEPOINT_OPEN,
BPF_BTF_LOAD,
BPF_BTF_GET_FD_BY_ID,
+ BPF_TASK_FD_QUERY,
};
enum bpf_map_type {
@@ -141,6 +142,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_SK_MSG,
BPF_PROG_TYPE_RAW_TRACEPOINT,
BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
+ BPF_PROG_TYPE_LWT_SEG6LOCAL,
};
enum bpf_attach_type {
@@ -284,8 +286,8 @@ union bpf_attr {
char map_name[BPF_OBJ_NAME_LEN];
__u32 map_ifindex; /* ifindex of netdev to create on */
__u32 btf_fd; /* fd pointing to a BTF type data */
- __u32 btf_key_id; /* BTF type_id of the key */
- __u32 btf_value_id; /* BTF type_id of the value */
+ __u32 btf_key_type_id; /* BTF type_id of the key */
+ __u32 btf_value_type_id; /* BTF type_id of the value */
};
struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
@@ -379,6 +381,22 @@ union bpf_attr {
__u32 btf_log_size;
__u32 btf_log_level;
};
+
+ struct {
+ __u32 pid; /* input: pid */
+ __u32 fd; /* input: fd */
+ __u32 flags; /* input: flags */
+ __u32 buf_len; /* input/output: buf len */
+ __aligned_u64 buf; /* input/output:
+ * tp_name for tracepoint
+ * symbol for kprobe
+ * filename for uprobe
+ */
+ __u32 prog_id; /* output: prod_id */
+ __u32 fd_type; /* output: BPF_FD_TYPE_* */
+ __u64 probe_offset; /* output: probe_offset */
+ __u64 probe_addr; /* output: probe_addr */
+ } task_fd_query;
} __attribute__((aligned(8)));
/* The description below is an attempt at providing documentation to eBPF
@@ -1902,6 +1920,90 @@ union bpf_attr {
* egress otherwise). This is the only flag supported for now.
* Return
* **SK_PASS** on success, or **SK_DROP** on error.
+ *
+ * int bpf_lwt_push_encap(struct sk_buff *skb, u32 type, void *hdr, u32 len)
+ * Description
+ * Encapsulate the packet associated to *skb* within a Layer 3
+ * protocol header. This header is provided in the buffer at
+ * address *hdr*, with *len* its size in bytes. *type* indicates
+ * the protocol of the header and can be one of:
+ *
+ * **BPF_LWT_ENCAP_SEG6**
+ * IPv6 encapsulation with Segment Routing Header
+ * (**struct ipv6_sr_hdr**). *hdr* only contains the SRH,
+ * the IPv6 header is computed by the kernel.
+ * **BPF_LWT_ENCAP_SEG6_INLINE**
+ * Only works if *skb* contains an IPv6 packet. Insert a
+ * Segment Routing Header (**struct ipv6_sr_hdr**) inside
+ * the IPv6 header.
+ *
+ * A call to this helper is susceptible to change the underlaying
+ * packet buffer. Therefore, at load time, all checks on pointers
+ * previously done by the verifier are invalidated and must be
+ * performed again, if the helper is used in combination with
+ * direct packet access.
+ * Return
+ * 0 on success, or a negative error in case of failure.
+ *
+ * int bpf_lwt_seg6_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len)
+ * Description
+ * Store *len* bytes from address *from* into the packet
+ * associated to *skb*, at *offset*. Only the flags, tag and TLVs
+ * inside the outermost IPv6 Segment Routing Header can be
+ * modified through this helper.
+ *
+ * A call to this helper is susceptible to change the underlaying
+ * packet buffer. Therefore, at load time, all checks on pointers
+ * previously done by the verifier are invalidated and must be
+ * performed again, if the helper is used in combination with
+ * direct packet access.
+ * Return
+ * 0 on success, or a negative error in case of failure.
+ *
+ * int bpf_lwt_seg6_adjust_srh(struct sk_buff *skb, u32 offset, s32 delta)
+ * Description
+ * Adjust the size allocated to TLVs in the outermost IPv6
+ * Segment Routing Header contained in the packet associated to
+ * *skb*, at position *offset* by *delta* bytes. Only offsets
+ * after the segments are accepted. *delta* can be as well
+ * positive (growing) as negative (shrinking).
+ *
+ * A call to this helper is susceptible to change the underlaying
+ * packet buffer. Therefore, at load time, all checks on pointers
+ * previously done by the verifier are invalidated and must be
+ * performed again, if the helper is used in combination with
+ * direct packet access.
+ * Return
+ * 0 on success, or a negative error in case of failure.
+ *
+ * int bpf_lwt_seg6_action(struct sk_buff *skb, u32 action, void *param, u32 param_len)
+ * Description
+ * Apply an IPv6 Segment Routing action of type *action* to the
+ * packet associated to *skb*. Each action takes a parameter
+ * contained at address *param*, and of length *param_len* bytes.
+ * *action* can be one of:
+ *
+ * **SEG6_LOCAL_ACTION_END_X**
+ * End.X action: Endpoint with Layer-3 cross-connect.
+ * Type of *param*: **struct in6_addr**.
+ * **SEG6_LOCAL_ACTION_END_T**
+ * End.T action: Endpoint with specific IPv6 table lookup.
+ * Type of *param*: **int**.
+ * **SEG6_LOCAL_ACTION_END_B6**
+ * End.B6 action: Endpoint bound to an SRv6 policy.
+ * Type of param: **struct ipv6_sr_hdr**.
+ * **SEG6_LOCAL_ACTION_END_B6_ENCAP**
+ * End.B6.Encap action: Endpoint bound to an SRv6
+ * encapsulation policy.
+ * Type of param: **struct ipv6_sr_hdr**.
+ *
+ * A call to this helper is susceptible to change the underlaying
+ * packet buffer. Therefore, at load time, all checks on pointers
+ * previously done by the verifier are invalidated and must be
+ * performed again, if the helper is used in combination with
+ * direct packet access.
+ * Return
+ * 0 on success, or a negative error in case of failure.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -1976,7 +2078,11 @@ union bpf_attr {
FN(fib_lookup), \
FN(sock_hash_update), \
FN(msg_redirect_hash), \
- FN(sk_redirect_hash),
+ FN(sk_redirect_hash), \
+ FN(lwt_push_encap), \
+ FN(lwt_seg6_store_bytes), \
+ FN(lwt_seg6_adjust_srh), \
+ FN(lwt_seg6_action),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
@@ -2043,6 +2149,12 @@ enum bpf_hdr_start_off {
BPF_HDR_START_NET,
};
+/* Encapsulation type for BPF_FUNC_lwt_push_encap helper. */
+enum bpf_lwt_encap_mode {
+ BPF_LWT_ENCAP_SEG6,
+ BPF_LWT_ENCAP_SEG6_INLINE
+};
+
/* user accessible mirror of in-kernel sk_buff.
* new fields can only be added to the end of this structure
*/
@@ -2176,6 +2288,14 @@ enum sk_action {
struct sk_msg_md {
void *data;
void *data_end;
+
+ __u32 family;
+ __u32 remote_ip4; /* Stored in network byte order */
+ __u32 local_ip4; /* Stored in network byte order */
+ __u32 remote_ip6[4]; /* Stored in network byte order */
+ __u32 local_ip6[4]; /* Stored in network byte order */
+ __u32 remote_port; /* Stored in network byte order */
+ __u32 local_port; /* stored in host byte order */
};
#define BPF_TAG_SIZE 8
@@ -2197,6 +2317,10 @@ struct bpf_prog_info {
__u32 gpl_compatible:1;
__u64 netns_dev;
__u64 netns_ino;
+ __u32 nr_jited_ksyms;
+ __u32 nr_jited_func_lens;
+ __aligned_u64 jited_ksyms;
+ __aligned_u64 jited_func_lens;
} __attribute__((aligned(8)));
struct bpf_map_info {
@@ -2211,8 +2335,8 @@ struct bpf_map_info {
__u64 netns_dev;
__u64 netns_ino;
__u32 btf_id;
- __u32 btf_key_id;
- __u32 btf_value_id;
+ __u32 btf_key_type_id;
+ __u32 btf_value_type_id;
} __attribute__((aligned(8)));
struct bpf_btf_info {
@@ -2450,4 +2574,13 @@ struct bpf_fib_lookup {
__u8 dmac[6]; /* ETH_ALEN */
};
+enum bpf_task_fd_type {
+ BPF_FD_TYPE_RAW_TRACEPOINT, /* tp name */
+ BPF_FD_TYPE_TRACEPOINT, /* tp name */
+ BPF_FD_TYPE_KPROBE, /* (symbol + offset) or addr */
+ BPF_FD_TYPE_KRETPROBE, /* (symbol + offset) or addr */
+ BPF_FD_TYPE_UPROBE, /* filename + offset */
+ BPF_FD_TYPE_URETPROBE, /* filename + offset */
+};
+
#endif /* _UAPI__LINUX_BPF_H__ */
diff --git a/tools/include/uapi/linux/btf.h b/tools/include/uapi/linux/btf.h
index bcb56ee47014..0b5ddbe135a4 100644
--- a/tools/include/uapi/linux/btf.h
+++ b/tools/include/uapi/linux/btf.h
@@ -12,42 +12,29 @@ struct btf_header {
__u16 magic;
__u8 version;
__u8 flags;
-
- __u32 parent_label;
- __u32 parent_name;
+ __u32 hdr_len;
/* All offsets are in bytes relative to the end of this header */
- __u32 label_off; /* offset of label section */
- __u32 object_off; /* offset of data object section*/
- __u32 func_off; /* offset of function section */
__u32 type_off; /* offset of type section */
+ __u32 type_len; /* length of type section */
__u32 str_off; /* offset of string section */
__u32 str_len; /* length of string section */
};
/* Max # of type identifier */
-#define BTF_MAX_TYPE 0x7fffffff
+#define BTF_MAX_TYPE 0x0000ffff
/* Max offset into the string section */
-#define BTF_MAX_NAME_OFFSET 0x7fffffff
+#define BTF_MAX_NAME_OFFSET 0x0000ffff
/* Max # of struct/union/enum members or func args */
#define BTF_MAX_VLEN 0xffff
-/* The type id is referring to a parent BTF */
-#define BTF_TYPE_PARENT(id) (((id) >> 31) & 0x1)
-#define BTF_TYPE_ID(id) ((id) & BTF_MAX_TYPE)
-
-/* String is in the ELF string section */
-#define BTF_STR_TBL_ELF_ID(ref) (((ref) >> 31) & 0x1)
-#define BTF_STR_OFFSET(ref) ((ref) & BTF_MAX_NAME_OFFSET)
-
struct btf_type {
__u32 name_off;
/* "info" bits arrangement
* bits 0-15: vlen (e.g. # of struct's members)
* bits 16-23: unused
- * bits 24-28: kind (e.g. int, ptr, array...etc)
- * bits 29-30: unused
- * bits 31: root
+ * bits 24-27: kind (e.g. int, ptr, array...etc)
+ * bits 28-31: unused
*/
__u32 info;
/* "size" is used by INT, ENUM, STRUCT and UNION.
@@ -62,8 +49,7 @@ struct btf_type {
};
};
-#define BTF_INFO_KIND(info) (((info) >> 24) & 0x1f)
-#define BTF_INFO_ISROOT(info) (!!(((info) >> 24) & 0x80))
+#define BTF_INFO_KIND(info) (((info) >> 24) & 0x0f)
#define BTF_INFO_VLEN(info) ((info) & 0xffff)
#define BTF_KIND_UNKN 0 /* Unknown */
@@ -88,15 +74,14 @@ struct btf_type {
/* BTF_KIND_INT is followed by a u32 and the following
* is the 32 bits arrangement:
*/
-#define BTF_INT_ENCODING(VAL) (((VAL) & 0xff000000) >> 24)
+#define BTF_INT_ENCODING(VAL) (((VAL) & 0x0f000000) >> 24)
#define BTF_INT_OFFSET(VAL) (((VAL & 0x00ff0000)) >> 16)
#define BTF_INT_BITS(VAL) ((VAL) & 0x0000ffff)
/* Attributes stored in the BTF_INT_ENCODING */
-#define BTF_INT_SIGNED 0x1
-#define BTF_INT_CHAR 0x2
-#define BTF_INT_BOOL 0x4
-#define BTF_INT_VARARGS 0x8
+#define BTF_INT_SIGNED (1 << 0)
+#define BTF_INT_CHAR (1 << 1)
+#define BTF_INT_BOOL (1 << 2)
/* BTF_KIND_ENUM is followed by multiple "struct btf_enum".
* The exact number of btf_enum is stored in the vlen (of the
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 6a8a00097fd8..9ddc89dae962 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -89,8 +89,8 @@ int bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr)
min(name_len, BPF_OBJ_NAME_LEN - 1));
attr.numa_node = create_attr->numa_node;
attr.btf_fd = create_attr->btf_fd;
- attr.btf_key_id = create_attr->btf_key_id;
- attr.btf_value_id = create_attr->btf_value_id;
+ attr.btf_key_type_id = create_attr->btf_key_type_id;
+ attr.btf_value_type_id = create_attr->btf_value_type_id;
attr.map_ifindex = create_attr->map_ifindex;
return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
@@ -643,3 +643,26 @@ retry:
return fd;
}
+
+int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
+ __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset,
+ __u64 *probe_addr)
+{
+ union bpf_attr attr = {};
+ int err;
+
+ attr.task_fd_query.pid = pid;
+ attr.task_fd_query.fd = fd;
+ attr.task_fd_query.flags = flags;
+ attr.task_fd_query.buf = ptr_to_u64(buf);
+ attr.task_fd_query.buf_len = *buf_len;
+
+ err = sys_bpf(BPF_TASK_FD_QUERY, &attr, sizeof(attr));
+ *buf_len = attr.task_fd_query.buf_len;
+ *prog_id = attr.task_fd_query.prog_id;
+ *fd_type = attr.task_fd_query.fd_type;
+ *probe_offset = attr.task_fd_query.probe_offset;
+ *probe_addr = attr.task_fd_query.probe_addr;
+
+ return err;
+}
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 15bff7728cf1..0639a30a457d 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -36,8 +36,8 @@ struct bpf_create_map_attr {
__u32 max_entries;
__u32 numa_node;
__u32 btf_fd;
- __u32 btf_key_id;
- __u32 btf_value_id;
+ __u32 btf_key_type_id;
+ __u32 btf_value_type_id;
__u32 map_ifindex;
};
@@ -107,4 +107,7 @@ int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
int bpf_raw_tracepoint_open(const char *name, int prog_fd);
int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size,
bool do_log);
+int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
+ __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset,
+ __u64 *probe_addr);
#endif
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 2bac710e3194..8c54a4b6f187 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -35,9 +35,8 @@ struct btf {
static const char *btf_name_by_offset(const struct btf *btf, uint32_t offset)
{
- if (!BTF_STR_TBL_ELF_ID(offset) &&
- BTF_STR_OFFSET(offset) < btf->hdr->str_len)
- return &btf->strings[BTF_STR_OFFSET(offset)];
+ if (offset < btf->hdr->str_len)
+ return &btf->strings[offset];
else
return NULL;
}
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index cbdf34a6fb93..d20411ebfa2f 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -216,8 +216,8 @@ struct bpf_map {
size_t offset;
int map_ifindex;
struct bpf_map_def def;
- uint32_t btf_key_id;
- uint32_t btf_value_id;
+ uint32_t btf_key_type_id;
+ uint32_t btf_value_type_id;
void *priv;
bpf_map_clear_priv_t clear_priv;
};
@@ -1042,8 +1042,8 @@ static int bpf_map_find_btf_info(struct bpf_map *map, const struct btf *btf)
}
if (def->key_size != key_size) {
- pr_warning("map:%s key_type:%s has BTF type_size:%ld != key_size:%u\n",
- map->name, name, key_size, def->key_size);
+ pr_warning("map:%s key_type:%s has BTF type_size:%u != key_size:%u\n",
+ map->name, name, (unsigned int)key_size, def->key_size);
return -EINVAL;
}
@@ -1069,13 +1069,13 @@ static int bpf_map_find_btf_info(struct bpf_map *map, const struct btf *btf)
}
if (def->value_size != value_size) {
- pr_warning("map:%s value_type:%s has BTF type_size:%ld != value_size:%u\n",
- map->name, name, value_size, def->value_size);
+ pr_warning("map:%s value_type:%s has BTF type_size:%u != value_size:%u\n",
+ map->name, name, (unsigned int)value_size, def->value_size);
return -EINVAL;
}
- map->btf_key_id = key_id;
- map->btf_value_id = value_id;
+ map->btf_key_type_id = key_id;
+ map->btf_value_type_id = value_id;
return 0;
}
@@ -1100,24 +1100,24 @@ bpf_object__create_maps(struct bpf_object *obj)
create_attr.value_size = def->value_size;
create_attr.max_entries = def->max_entries;
create_attr.btf_fd = 0;
- create_attr.btf_key_id = 0;
- create_attr.btf_value_id = 0;
+ create_attr.btf_key_type_id = 0;
+ create_attr.btf_value_type_id = 0;
if (obj->btf && !bpf_map_find_btf_info(map, obj->btf)) {
create_attr.btf_fd = btf__fd(obj->btf);
- create_attr.btf_key_id = map->btf_key_id;
- create_attr.btf_value_id = map->btf_value_id;
+ create_attr.btf_key_type_id = map->btf_key_type_id;
+ create_attr.btf_value_type_id = map->btf_value_type_id;
}
*pfd = bpf_create_map_xattr(&create_attr);
- if (*pfd < 0 && create_attr.btf_key_id) {
+ if (*pfd < 0 && create_attr.btf_key_type_id) {
pr_warning("Error in bpf_create_map_xattr(%s):%s(%d). Retrying without BTF.\n",
map->name, strerror(errno), errno);
create_attr.btf_fd = 0;
- create_attr.btf_key_id = 0;
- create_attr.btf_value_id = 0;
- map->btf_key_id = 0;
- map->btf_value_id = 0;
+ create_attr.btf_key_type_id = 0;
+ create_attr.btf_value_type_id = 0;
+ map->btf_key_type_id = 0;
+ map->btf_value_type_id = 0;
*pfd = bpf_create_map_xattr(&create_attr);
}
@@ -1456,6 +1456,7 @@ static bool bpf_prog_type__needs_kver(enum bpf_prog_type type)
case BPF_PROG_TYPE_LWT_IN:
case BPF_PROG_TYPE_LWT_OUT:
case BPF_PROG_TYPE_LWT_XMIT:
+ case BPF_PROG_TYPE_LWT_SEG6LOCAL:
case BPF_PROG_TYPE_SOCK_OPS:
case BPF_PROG_TYPE_SK_SKB:
case BPF_PROG_TYPE_CGROUP_DEVICE:
@@ -2085,14 +2086,14 @@ const char *bpf_map__name(struct bpf_map *map)
return map ? map->name : NULL;
}
-uint32_t bpf_map__btf_key_id(const struct bpf_map *map)
+uint32_t bpf_map__btf_key_type_id(const struct bpf_map *map)
{
- return map ? map->btf_key_id : 0;
+ return map ? map->btf_key_type_id : 0;
}
-uint32_t bpf_map__btf_value_id(const struct bpf_map *map)
+uint32_t bpf_map__btf_value_type_id(const struct bpf_map *map)
{
- return map ? map->btf_value_id : 0;
+ return map ? map->btf_value_type_id : 0;
}
int bpf_map__set_priv(struct bpf_map *map, void *priv,
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index cd3fd8d782c7..09976531aa74 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -244,8 +244,8 @@ bpf_map__next(struct bpf_map *map, struct bpf_object *obj);
int bpf_map__fd(struct bpf_map *map);
const struct bpf_map_def *bpf_map__def(struct bpf_map *map);
const char *bpf_map__name(struct bpf_map *map);
-uint32_t bpf_map__btf_key_id(const struct bpf_map *map);
-uint32_t bpf_map__btf_value_id(const struct bpf_map *map);
+uint32_t bpf_map__btf_key_type_id(const struct bpf_map *map);
+uint32_t bpf_map__btf_value_type_id(const struct bpf_map *map);
typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *);
int bpf_map__set_priv(struct bpf_map *map, void *priv,
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 1eb0fa2aba92..85044448bbc7 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -33,7 +33,8 @@ TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test
sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \
sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \
test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o test_tunnel_kern.o \
- test_get_stack_rawtp.o test_sockmap_kern.o test_sockhash_kern.o
+ test_get_stack_rawtp.o test_sockmap_kern.o test_sockhash_kern.o \
+ test_lwt_seg6local.o
# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
@@ -42,7 +43,8 @@ TEST_PROGS := test_kmod.sh \
test_xdp_meta.sh \
test_offload.py \
test_sock_addr.sh \
- test_tunnel.sh
+ test_tunnel.sh \
+ test_lwt_seg6local.sh
# Compile but not part of 'make run_tests'
TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr
@@ -84,7 +86,17 @@ else
CPU ?= generic
endif
+# Get Clang's default includes on this system, as opposed to those seen by
+# '-target bpf'. This fixes "missing" files on some architectures/distros,
+# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
+#
+# Use '-idirafter': Don't interfere with include mechanics except where the
+# build would have failed anyways.
+CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
+ | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
+
CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
+ $(CLANG_SYS_INCLUDES) \
-Wno-compare-distinct-pointer-types
$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h
index 8f143dfb3700..334d3e8c5e89 100644
--- a/tools/testing/selftests/bpf/bpf_helpers.h
+++ b/tools/testing/selftests/bpf/bpf_helpers.h
@@ -114,6 +114,18 @@ static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) =
static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params,
int plen, __u32 flags) =
(void *) BPF_FUNC_fib_lookup;
+static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr,
+ unsigned int len) =
+ (void *) BPF_FUNC_lwt_push_encap;
+static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset,
+ void *from, unsigned int len) =
+ (void *) BPF_FUNC_lwt_seg6_store_bytes;
+static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param,
+ unsigned int param_len) =
+ (void *) BPF_FUNC_lwt_seg6_action;
+static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset,
+ unsigned int len) =
+ (void *) BPF_FUNC_lwt_seg6_adjust_srh;
/* llvm builtin functions that eBPF C program may use to
* emit BPF_LD_ABS and BPF_LD_IND instructions
diff --git a/tools/testing/selftests/bpf/test_btf.c b/tools/testing/selftests/bpf/test_btf.c
index c8bceae7ec02..35064df688c1 100644
--- a/tools/testing/selftests/bpf/test_btf.c
+++ b/tools/testing/selftests/bpf/test_btf.c
@@ -113,22 +113,25 @@ static char btf_log_buf[BTF_LOG_BUF_SIZE];
static struct btf_header hdr_tmpl = {
.magic = BTF_MAGIC,
.version = BTF_VERSION,
+ .hdr_len = sizeof(struct btf_header),
};
struct btf_raw_test {
const char *descr;
const char *str_sec;
const char *map_name;
+ const char *err_str;
__u32 raw_types[MAX_NR_RAW_TYPES];
__u32 str_sec_size;
enum bpf_map_type map_type;
__u32 key_size;
__u32 value_size;
- __u32 key_id;
- __u32 value_id;
+ __u32 key_type_id;
+ __u32 value_type_id;
__u32 max_entries;
bool btf_load_err;
bool map_create_err;
+ int hdr_len_delta;
int type_off_delta;
int str_off_delta;
int str_len_delta;
@@ -141,8 +144,8 @@ static struct btf_raw_test raw_tests[] = {
* };
*
* struct A {
- * int m;
- * unsigned long long n;
+ * unsigned long long m;
+ * int n;
* char o;
* [3 bytes hole]
* int p[8];
@@ -163,8 +166,8 @@ static struct btf_raw_test raw_tests[] = {
BTF_TYPE_ARRAY_ENC(1, 1, 8), /* [4] */
/* struct A { */ /* [5] */
BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 6), 180),
- BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
- BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* unsigned long long n;*/
+ BTF_MEMBER_ENC(NAME_TBD, 2, 0), /* unsigned long long m;*/
+ BTF_MEMBER_ENC(NAME_TBD, 1, 64),/* int n; */
BTF_MEMBER_ENC(NAME_TBD, 3, 96),/* char o; */
BTF_MEMBER_ENC(NAME_TBD, 4, 128),/* int p[8] */
BTF_MEMBER_ENC(NAME_TBD, 6, 384),/* int q[4][8] */
@@ -172,6 +175,7 @@ static struct btf_raw_test raw_tests[] = {
/* } */
/* int[4][8] */
BTF_TYPE_ARRAY_ENC(4, 1, 4), /* [6] */
+ /* enum E */ /* [7] */
BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 2), sizeof(int)),
BTF_ENUM_ENC(NAME_TBD, 0),
BTF_ENUM_ENC(NAME_TBD, 1),
@@ -183,8 +187,8 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "struct_test1_map",
.key_size = sizeof(int),
.value_size = 180,
- .key_id = 1,
- .value_id = 5,
+ .key_type_id = 1,
+ .value_type_id = 5,
.max_entries = 4,
},
@@ -238,8 +242,8 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "struct_test2_map",
.key_size = sizeof(int),
.value_size = 68,
- .key_id = 1,
- .value_id = 3,
+ .key_type_id = 1,
+ .value_type_id = 3,
.max_entries = 4,
},
@@ -258,7 +262,7 @@ static struct btf_raw_test raw_tests[] = {
/* struct A { */ /* [2] */
BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), sizeof(int) * 2 - 1),
BTF_MEMBER_ENC(NAME_TBD, 1, 0), /* int m; */
- BTF_MEMBER_ENC(NAME_TBD, 2, 32),/* int n; */
+ BTF_MEMBER_ENC(NAME_TBD, 1, 32),/* int n; */
/* } */
BTF_END_RAW,
},
@@ -268,10 +272,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "size_check1_map",
.key_size = sizeof(int),
.value_size = 1,
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Member exceeds struct_size",
},
/* Test member exeeds the size of struct
@@ -301,11 +306,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "size_check2_map",
.key_size = sizeof(int),
.value_size = 1,
- .key_id = 1,
- .value_id = 3,
+ .key_type_id = 1,
+ .value_type_id = 3,
.max_entries = 4,
.btf_load_err = true,
-
+ .err_str = "Member exceeds struct_size",
},
/* Test member exeeds the size of struct
@@ -335,10 +340,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "size_check3_map",
.key_size = sizeof(int),
.value_size = 1,
- .key_id = 1,
- .value_id = 3,
+ .key_type_id = 1,
+ .value_type_id = 3,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Member exceeds struct_size",
},
/* Test member exceeds the size of struct
@@ -376,10 +382,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "size_check4_map",
.key_size = sizeof(int),
.value_size = 1,
- .key_id = 1,
- .value_id = 3,
+ .key_type_id = 1,
+ .value_type_id = 3,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Member exceeds struct_size",
},
/* typedef const void * const_void_ptr;
@@ -411,8 +418,8 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "void_test1_map",
.key_size = sizeof(int),
.value_size = sizeof(void *),
- .key_id = 1,
- .value_id = 4,
+ .key_type_id = 1,
+ .value_type_id = 4,
.max_entries = 4,
},
@@ -440,10 +447,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "void_test2_map",
.key_size = sizeof(int),
.value_size = sizeof(void *),
- .key_id = 1,
- .value_id = 3,
+ .key_type_id = 1,
+ .value_type_id = 3,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Invalid member",
},
/* typedef const void * const_void_ptr;
@@ -458,9 +466,9 @@ static struct btf_raw_test raw_tests[] = {
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
/* const void* */ /* [3] */
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 2),
- /* typedef const void * const_void_ptr */
+ /* typedef const void * const_void_ptr */ /* [4] */
BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 3),
- /* const_void_ptr[4] */ /* [4] */
+ /* const_void_ptr[4] */ /* [5] */
BTF_TYPE_ARRAY_ENC(3, 1, 4),
BTF_END_RAW,
},
@@ -470,8 +478,8 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "void_test3_map",
.key_size = sizeof(int),
.value_size = sizeof(void *) * 4,
- .key_id = 1,
- .value_id = 4,
+ .key_type_id = 1,
+ .value_type_id = 4,
.max_entries = 4,
},
@@ -493,10 +501,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "void_test4_map",
.key_size = sizeof(int),
.value_size = sizeof(void *) * 4,
- .key_id = 1,
- .value_id = 3,
+ .key_type_id = 1,
+ .value_type_id = 3,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Invalid elem",
},
/* Array_A <------------------+
@@ -523,10 +532,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test1_map",
.key_size = sizeof(int),
.value_size = sizeof(sizeof(int) * 8),
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
/* typedef is _before_ the BTF type of Array_A and Array_B
@@ -551,7 +561,6 @@ static struct btf_raw_test raw_tests[] = {
BTF_TYPE_ARRAY_ENC(2, 1, 8), /* [3] */
/* Array_B */
BTF_TYPE_ARRAY_ENC(3, 1, 8), /* [4] */
-
BTF_END_RAW,
},
.str_sec = "\0int_array\0",
@@ -560,10 +569,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test2_map",
.key_size = sizeof(int),
.value_size = sizeof(sizeof(int) * 8),
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
/* Array_A <------------------+
@@ -582,7 +592,6 @@ static struct btf_raw_test raw_tests[] = {
BTF_TYPE_ARRAY_ENC(3, 1, 8),
/* Array_B */ /* [3] */
BTF_TYPE_ARRAY_ENC(2, 1, 8),
-
BTF_END_RAW,
},
.str_sec = "",
@@ -591,10 +600,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test3_map",
.key_size = sizeof(int),
.value_size = sizeof(sizeof(int) * 8),
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
/* typedef is _between_ the BTF type of Array_A and Array_B
@@ -627,10 +637,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test4_map",
.key_size = sizeof(int),
.value_size = sizeof(sizeof(int) * 8),
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
/* typedef struct B Struct_B
@@ -668,10 +679,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test5_map",
.key_size = sizeof(int),
.value_size = 8,
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
/* struct A {
@@ -697,10 +709,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test6_map",
.key_size = sizeof(int),
.value_size = 8,
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
{
@@ -724,10 +737,11 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test7_map",
.key_size = sizeof(int),
.value_size = sizeof(void *),
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
{
@@ -759,34 +773,73 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "loop_test8_map",
.key_size = sizeof(int),
.value_size = sizeof(void *),
- .key_id = 1,
- .value_id = 2,
+ .key_type_id = 1,
+ .value_type_id = 2,
.max_entries = 4,
.btf_load_err = true,
+ .err_str = "Loop detected",
},
{
- .descr = "type_off == str_off",
+ .descr = "string section does not end with null",
.raw_types = {
/* int */ /* [1] */
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
BTF_END_RAW,
},
.str_sec = "\0int",
+ .str_sec_size = sizeof("\0int") - 1,
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "hdr_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid string section",
+},
+
+{
+ .descr = "empty string section",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = 0,
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "hdr_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid string section",
+},
+
+{
+ .descr = "empty type section",
+ .raw_types = {
+ BTF_END_RAW,
+ },
+ .str_sec = "\0int",
.str_sec_size = sizeof("\0int"),
.map_type = BPF_MAP_TYPE_ARRAY,
.map_name = "hdr_test_map",
.key_size = sizeof(int),
.value_size = sizeof(int),
- .key_id = 1,
- .value_id = 1,
+ .key_type_id = 1,
+ .value_type_id = 1,
.max_entries = 4,
.btf_load_err = true,
- .type_off_delta = sizeof(struct btf_type) + sizeof(int) + sizeof("\0int"),
+ .err_str = "No type found",
},
{
- .descr = "Unaligned type_off",
+ .descr = "btf_header test. Longer hdr_len",
.raw_types = {
/* int */ /* [1] */
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
@@ -798,15 +851,16 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "hdr_test_map",
.key_size = sizeof(int),
.value_size = sizeof(int),
- .key_id = 1,
- .value_id = 1,
+ .key_type_id = 1,
+ .value_type_id = 1,
.max_entries = 4,
.btf_load_err = true,
- .type_off_delta = 1,
+ .hdr_len_delta = 4,
+ .err_str = "Unsupported btf_header",
},
{
- .descr = "str_off beyonds btf size",
+ .descr = "btf_header test. Gap between hdr and type",
.raw_types = {
/* int */ /* [1] */
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
@@ -818,15 +872,16 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "hdr_test_map",
.key_size = sizeof(int),
.value_size = sizeof(int),
- .key_id = 1,
- .value_id = 1,
+ .key_type_id = 1,
+ .value_type_id = 1,
.max_entries = 4,
.btf_load_err = true,
- .str_off_delta = sizeof("\0int") + 1,
+ .type_off_delta = 4,
+ .err_str = "Unsupported section found",
},
{
- .descr = "str_len beyonds btf size",
+ .descr = "btf_header test. Gap between type and str",
.raw_types = {
/* int */ /* [1] */
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
@@ -838,15 +893,16 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "hdr_test_map",
.key_size = sizeof(int),
.value_size = sizeof(int),
- .key_id = 1,
- .value_id = 1,
+ .key_type_id = 1,
+ .value_type_id = 1,
.max_entries = 4,
.btf_load_err = true,
- .str_len_delta = 1,
+ .str_off_delta = 4,
+ .err_str = "Unsupported section found",
},
{
- .descr = "String section does not end with null",
+ .descr = "btf_header test. Overlap between type and str",
.raw_types = {
/* int */ /* [1] */
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
@@ -858,15 +914,16 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "hdr_test_map",
.key_size = sizeof(int),
.value_size = sizeof(int),
- .key_id = 1,
- .value_id = 1,
+ .key_type_id = 1,
+ .value_type_id = 1,
.max_entries = 4,
.btf_load_err = true,
- .str_len_delta = -1,
+ .str_off_delta = -4,
+ .err_str = "Section overlap found",
},
{
- .descr = "Empty string section",
+ .descr = "btf_header test. Larger BTF size",
.raw_types = {
/* int */ /* [1] */
BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
@@ -878,11 +935,288 @@ static struct btf_raw_test raw_tests[] = {
.map_name = "hdr_test_map",
.key_size = sizeof(int),
.value_size = sizeof(int),
- .key_id = 1,
- .value_id = 1,
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .str_len_delta = -4,
+ .err_str = "Unsupported section found",
+},
+
+{
+ .descr = "btf_header test. Smaller BTF size",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4),
+ BTF_END_RAW,
+ },
+ .str_sec = "\0int",
+ .str_sec_size = sizeof("\0int"),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "hdr_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .str_len_delta = 4,
+ .err_str = "Total section length too long",
+},
+
+{
+ .descr = "array test. index_type/elem_type \"int\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(1, 1, 16),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+},
+
+{
+ .descr = "array test. index_type/elem_type \"const int\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(3, 3, 16),
+ /* CONST type_id=1 */ /* [3] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 1),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+},
+
+{
+ .descr = "array test. index_type \"const int:31\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int:31 */ /* [2] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 31, 4),
+ /* int[16] */ /* [3] */
+ BTF_TYPE_ARRAY_ENC(1, 4, 16),
+ /* CONST type_id=2 */ /* [4] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 2),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid index",
+},
+
+{
+ .descr = "array test. elem_type \"const int:31\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int:31 */ /* [2] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 31, 4),
+ /* int[16] */ /* [3] */
+ BTF_TYPE_ARRAY_ENC(4, 1, 16),
+ /* CONST type_id=2 */ /* [4] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 2),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid array of int",
+},
+
+{
+ .descr = "array test. index_type \"void\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(1, 0, 16),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid index",
+},
+
+{
+ .descr = "array test. index_type \"const void\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(1, 3, 16),
+ /* CONST type_id=0 (void) */ /* [3] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid index",
+},
+
+{
+ .descr = "array test. elem_type \"const void\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* int[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(3, 1, 16),
+ /* CONST type_id=0 (void) */ /* [3] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 0),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid elem",
+},
+
+{
+ .descr = "array test. elem_type \"const void *\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* const void *[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(3, 1, 16),
+ /* CONST type_id=4 */ /* [3] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 4),
+ /* void* */ /* [4] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 0),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+},
+
+{
+ .descr = "array test. index_type \"const void *\"",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ /* const void *[16] */ /* [2] */
+ BTF_TYPE_ARRAY_ENC(3, 3, 16),
+ /* CONST type_id=4 */ /* [3] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 4),
+ /* void* */ /* [4] */
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 0),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
.max_entries = 4,
.btf_load_err = true,
- .str_len_delta = 0 - (int)sizeof("\0int"),
+ .err_str = "Invalid index",
+},
+
+{
+ .descr = "int test. invalid int_data",
+ .raw_types = {
+ BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_INT, 0, 0), 4),
+ 0x10000000,
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid int_data",
+},
+
+{
+ .descr = "invalid BTF_INFO",
+ .raw_types = {
+ /* int */ /* [1] */
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+ BTF_TYPE_ENC(0, 0x10000000, 4),
+ BTF_END_RAW,
+ },
+ .str_sec = "",
+ .str_sec_size = sizeof(""),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "array_test_map",
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .key_type_id = 1,
+ .value_type_id = 1,
+ .max_entries = 4,
+ .btf_load_err = true,
+ .err_str = "Invalid btf_info",
},
}; /* struct btf_raw_test raw_tests[] */
@@ -951,6 +1285,7 @@ static void *btf_raw_create(const struct btf_header *hdr,
memcpy(raw_btf + offset, str, str_sec_size);
ret_hdr = (struct btf_header *)raw_btf;
+ ret_hdr->type_len = type_sec_size;
ret_hdr->str_off = type_sec_size;
ret_hdr->str_len = str_sec_size;
@@ -981,6 +1316,7 @@ static int do_test_raw(unsigned int test_num)
hdr = raw_btf;
+ hdr->hdr_len = (int)hdr->hdr_len + test->hdr_len_delta;
hdr->type_off = (int)hdr->type_off + test->type_off_delta;
hdr->str_off = (int)hdr->str_off + test->str_off_delta;
hdr->str_len = (int)hdr->str_len + test->str_len_delta;
@@ -992,8 +1328,13 @@ static int do_test_raw(unsigned int test_num)
free(raw_btf);
err = ((btf_fd == -1) != test->btf_load_err);
- CHECK(err, "btf_fd:%d test->btf_load_err:%u",
- btf_fd, test->btf_load_err);
+ if (CHECK(err, "btf_fd:%d test->btf_load_err:%u",
+ btf_fd, test->btf_load_err) ||
+ CHECK(test->err_str && !strstr(btf_log_buf, test->err_str),
+ "expected err_str:%s", test->err_str)) {
+ err = -1;
+ goto done;
+ }
if (err || btf_fd == -1)
goto done;
@@ -1004,8 +1345,8 @@ static int do_test_raw(unsigned int test_num)
create_attr.value_size = test->value_size;
create_attr.max_entries = test->max_entries;
create_attr.btf_fd = btf_fd;
- create_attr.btf_key_id = test->key_id;
- create_attr.btf_value_id = test->value_id;
+ create_attr.btf_key_type_id = test->key_type_id;
+ create_attr.btf_value_type_id = test->value_type_id;
map_fd = bpf_create_map_xattr(&create_attr);
@@ -1267,8 +1608,8 @@ static int test_btf_id(unsigned int test_num)
create_attr.value_size = sizeof(unsigned int);
create_attr.max_entries = 4;
create_attr.btf_fd = btf_fd[0];
- create_attr.btf_key_id = 1;
- create_attr.btf_value_id = 2;
+ create_attr.btf_key_type_id = 1;
+ create_attr.btf_value_type_id = 2;
map_fd = bpf_create_map_xattr(&create_attr);
if (CHECK(map_fd == -1, "errno:%d", errno)) {
@@ -1279,10 +1620,10 @@ static int test_btf_id(unsigned int test_num)
info_len = sizeof(map_info);
err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len);
if (CHECK(err || map_info.btf_id != info[0].id ||
- map_info.btf_key_id != 1 || map_info.btf_value_id != 2,
- "err:%d errno:%d info.id:%u btf_id:%u btf_key_id:%u btf_value_id:%u",
- err, errno, info[0].id, map_info.btf_id, map_info.btf_key_id,
- map_info.btf_value_id)) {
+ map_info.btf_key_type_id != 1 || map_info.btf_value_type_id != 2,
+ "err:%d errno:%d info.id:%u btf_id:%u btf_key_type_id:%u btf_value_type_id:%u",
+ err, errno, info[0].id, map_info.btf_id, map_info.btf_key_type_id,
+ map_info.btf_value_type_id)) {
err = -1;
goto done;
}
@@ -1542,10 +1883,10 @@ static int do_test_file(unsigned int test_num)
goto done;
}
- err = (bpf_map__btf_key_id(map) == 0 || bpf_map__btf_value_id(map) == 0)
+ err = (bpf_map__btf_key_type_id(map) == 0 || bpf_map__btf_value_type_id(map) == 0)
!= test->btf_kv_notfound;
- if (CHECK(err, "btf_key_id:%u btf_value_id:%u test->btf_kv_notfound:%u",
- bpf_map__btf_key_id(map), bpf_map__btf_value_id(map),
+ if (CHECK(err, "btf_key_type_id:%u btf_value_type_id:%u test->btf_kv_notfound:%u",
+ bpf_map__btf_key_type_id(map), bpf_map__btf_value_type_id(map),
test->btf_kv_notfound))
goto done;
@@ -1615,7 +1956,7 @@ static struct btf_raw_test pprint_test = {
/* 28 bits */ /* [7] */
BTF_TYPE_INT_ENC(0, 0, 0, 28, 4),
/* uint8_t[8] */ /* [8] */
- BTF_TYPE_ARRAY_ENC(9, 3, 8),
+ BTF_TYPE_ARRAY_ENC(9, 1, 8),
/* typedef unsigned char uint8_t */ /* [9] */
BTF_TYPEDEF_ENC(NAME_TBD, 1),
/* typedef unsigned short uint16_t */ /* [10] */
@@ -1654,8 +1995,8 @@ static struct btf_raw_test pprint_test = {
.map_name = "pprint_test",
.key_size = sizeof(unsigned int),
.value_size = sizeof(struct pprint_mapv),
- .key_id = 3, /* unsigned int */
- .value_id = 16, /* struct pprint_mapv */
+ .key_type_id = 3, /* unsigned int */
+ .value_type_id = 16, /* struct pprint_mapv */
.max_entries = 128 * 1024,
};
@@ -1712,8 +2053,8 @@ static int test_pprint(void)
create_attr.value_size = test->value_size;
create_attr.max_entries = test->max_entries;
create_attr.btf_fd = btf_fd;
- create_attr.btf_key_id = test->key_id;
- create_attr.btf_value_id = test->value_id;
+ create_attr.btf_key_type_id = test->key_type_id;
+ create_attr.btf_value_type_id = test->value_type_id;
map_fd = bpf_create_map_xattr(&create_attr);
if (CHECK(map_fd == -1, "errno:%d", errno)) {
diff --git a/tools/testing/selftests/bpf/test_lwt_seg6local.c b/tools/testing/selftests/bpf/test_lwt_seg6local.c
new file mode 100644
index 000000000000..0575751bc1bc
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_lwt_seg6local.c
@@ -0,0 +1,437 @@
+#include <stddef.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <linux/seg6_local.h>
+#include <linux/bpf.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define bpf_printk(fmt, ...) \
+({ \
+ char ____fmt[] = fmt; \
+ bpf_trace_printk(____fmt, sizeof(____fmt), \
+ ##__VA_ARGS__); \
+})
+
+/* Packet parsing state machine helpers. */
+#define cursor_advance(_cursor, _len) \
+ ({ void *_tmp = _cursor; _cursor += _len; _tmp; })
+
+#define SR6_FLAG_ALERT (1 << 4)
+
+#define htonll(x) ((bpf_htonl(1)) == 1 ? (x) : ((uint64_t)bpf_htonl((x) & \
+ 0xFFFFFFFF) << 32) | bpf_htonl((x) >> 32))
+#define ntohll(x) ((bpf_ntohl(1)) == 1 ? (x) : ((uint64_t)bpf_ntohl((x) & \
+ 0xFFFFFFFF) << 32) | bpf_ntohl((x) >> 32))
+#define BPF_PACKET_HEADER __attribute__((packed))
+
+struct ip6_t {
+ unsigned int ver:4;
+ unsigned int priority:8;
+ unsigned int flow_label:20;
+ unsigned short payload_len;
+ unsigned char next_header;
+ unsigned char hop_limit;
+ unsigned long long src_hi;
+ unsigned long long src_lo;
+ unsigned long long dst_hi;
+ unsigned long long dst_lo;
+} BPF_PACKET_HEADER;
+
+struct ip6_addr_t {
+ unsigned long long hi;
+ unsigned long long lo;
+} BPF_PACKET_HEADER;
+
+struct ip6_srh_t {
+ unsigned char nexthdr;
+ unsigned char hdrlen;
+ unsigned char type;
+ unsigned char segments_left;
+ unsigned char first_segment;
+ unsigned char flags;
+ unsigned short tag;
+
+ struct ip6_addr_t segments[0];
+} BPF_PACKET_HEADER;
+
+struct sr6_tlv_t {
+ unsigned char type;
+ unsigned char len;
+ unsigned char value[0];
+} BPF_PACKET_HEADER;
+
+__attribute__((always_inline)) struct ip6_srh_t *get_srh(struct __sk_buff *skb)
+{
+ void *cursor, *data_end;
+ struct ip6_srh_t *srh;
+ struct ip6_t *ip;
+ uint8_t *ipver;
+
+ data_end = (void *)(long)skb->data_end;
+ cursor = (void *)(long)skb->data;
+ ipver = (uint8_t *)cursor;
+
+ if ((void *)ipver + sizeof(*ipver) > data_end)
+ return NULL;
+
+ if ((*ipver >> 4) != 6)
+ return NULL;
+
+ ip = cursor_advance(cursor, sizeof(*ip));
+ if ((void *)ip + sizeof(*ip) > data_end)
+ return NULL;
+
+ if (ip->next_header != 43)
+ return NULL;
+
+ srh = cursor_advance(cursor, sizeof(*srh));
+ if ((void *)srh + sizeof(*srh) > data_end)
+ return NULL;
+
+ if (srh->type != 4)
+ return NULL;
+
+ return srh;
+}
+
+__attribute__((always_inline))
+int update_tlv_pad(struct __sk_buff *skb, uint32_t new_pad,
+ uint32_t old_pad, uint32_t pad_off)
+{
+ int err;
+
+ if (new_pad != old_pad) {
+ err = bpf_lwt_seg6_adjust_srh(skb, pad_off,
+ (int) new_pad - (int) old_pad);
+ if (err)
+ return err;
+ }
+
+ if (new_pad > 0) {
+ char pad_tlv_buf[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0};
+ struct sr6_tlv_t *pad_tlv = (struct sr6_tlv_t *) pad_tlv_buf;
+
+ pad_tlv->type = SR6_TLV_PADDING;
+ pad_tlv->len = new_pad - 2;
+
+ err = bpf_lwt_seg6_store_bytes(skb, pad_off,
+ (void *)pad_tlv_buf, new_pad);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+__attribute__((always_inline))
+int is_valid_tlv_boundary(struct __sk_buff *skb, struct ip6_srh_t *srh,
+ uint32_t *tlv_off, uint32_t *pad_size,
+ uint32_t *pad_off)
+{
+ uint32_t srh_off, cur_off;
+ int offset_valid = 0;
+ int err;
+
+ srh_off = (char *)srh - (char *)(long)skb->data;
+ // cur_off = end of segments, start of possible TLVs
+ cur_off = srh_off + sizeof(*srh) +
+ sizeof(struct ip6_addr_t) * (srh->first_segment + 1);
+
+ *pad_off = 0;
+
+ // we can only go as far as ~10 TLVs due to the BPF max stack size
+ #pragma clang loop unroll(full)
+ for (int i = 0; i < 10; i++) {
+ struct sr6_tlv_t tlv;
+
+ if (cur_off == *tlv_off)
+ offset_valid = 1;
+
+ if (cur_off >= srh_off + ((srh->hdrlen + 1) << 3))
+ break;
+
+ err = bpf_skb_load_bytes(skb, cur_off, &tlv, sizeof(tlv));
+ if (err)
+ return err;
+
+ if (tlv.type == SR6_TLV_PADDING) {
+ *pad_size = tlv.len + sizeof(tlv);
+ *pad_off = cur_off;
+
+ if (*tlv_off == srh_off) {
+ *tlv_off = cur_off;
+ offset_valid = 1;
+ }
+ break;
+
+ } else if (tlv.type == SR6_TLV_HMAC) {
+ break;
+ }
+
+ cur_off += sizeof(tlv) + tlv.len;
+ } // we reached the padding or HMAC TLVs, or the end of the SRH
+
+ if (*pad_off == 0)
+ *pad_off = cur_off;
+
+ if (*tlv_off == -1)
+ *tlv_off = cur_off;
+ else if (!offset_valid)
+ return -EINVAL;
+
+ return 0;
+}
+
+__attribute__((always_inline))
+int add_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh, uint32_t tlv_off,
+ struct sr6_tlv_t *itlv, uint8_t tlv_size)
+{
+ uint32_t srh_off = (char *)srh - (char *)(long)skb->data;
+ uint8_t len_remaining, new_pad;
+ uint32_t pad_off = 0;
+ uint32_t pad_size = 0;
+ uint32_t partial_srh_len;
+ int err;
+
+ if (tlv_off != -1)
+ tlv_off += srh_off;
+
+ if (itlv->type == SR6_TLV_PADDING || itlv->type == SR6_TLV_HMAC)
+ return -EINVAL;
+
+ err = is_valid_tlv_boundary(skb, srh, &tlv_off, &pad_size, &pad_off);
+ if (err)
+ return err;
+
+ err = bpf_lwt_seg6_adjust_srh(skb, tlv_off, sizeof(*itlv) + itlv->len);
+ if (err)
+ return err;
+
+ err = bpf_lwt_seg6_store_bytes(skb, tlv_off, (void *)itlv, tlv_size);
+ if (err)
+ return err;
+
+ // the following can't be moved inside update_tlv_pad because the
+ // bpf verifier has some issues with it
+ pad_off += sizeof(*itlv) + itlv->len;
+ partial_srh_len = pad_off - srh_off;
+ len_remaining = partial_srh_len % 8;
+ new_pad = 8 - len_remaining;
+
+ if (new_pad == 1) // cannot pad for 1 byte only
+ new_pad = 9;
+ else if (new_pad == 8)
+ new_pad = 0;
+
+ return update_tlv_pad(skb, new_pad, pad_size, pad_off);
+}
+
+__attribute__((always_inline))
+int delete_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh,
+ uint32_t tlv_off)
+{
+ uint32_t srh_off = (char *)srh - (char *)(long)skb->data;
+ uint8_t len_remaining, new_pad;
+ uint32_t partial_srh_len;
+ uint32_t pad_off = 0;
+ uint32_t pad_size = 0;
+ struct sr6_tlv_t tlv;
+ int err;
+
+ tlv_off += srh_off;
+
+ err = is_valid_tlv_boundary(skb, srh, &tlv_off, &pad_size, &pad_off);
+ if (err)
+ return err;
+
+ err = bpf_skb_load_bytes(skb, tlv_off, &tlv, sizeof(tlv));
+ if (err)
+ return err;
+
+ err = bpf_lwt_seg6_adjust_srh(skb, tlv_off, -(sizeof(tlv) + tlv.len));
+ if (err)
+ return err;
+
+ pad_off -= sizeof(tlv) + tlv.len;
+ partial_srh_len = pad_off - srh_off;
+ len_remaining = partial_srh_len % 8;
+ new_pad = 8 - len_remaining;
+ if (new_pad == 1) // cannot pad for 1 byte only
+ new_pad = 9;
+ else if (new_pad == 8)
+ new_pad = 0;
+
+ return update_tlv_pad(skb, new_pad, pad_size, pad_off);
+}
+
+__attribute__((always_inline))
+int has_egr_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh)
+{
+ int tlv_offset = sizeof(struct ip6_t) + sizeof(struct ip6_srh_t) +
+ ((srh->first_segment + 1) << 4);
+ struct sr6_tlv_t tlv;
+
+ if (bpf_skb_load_bytes(skb, tlv_offset, &tlv, sizeof(struct sr6_tlv_t)))
+ return 0;
+
+ if (tlv.type == SR6_TLV_EGRESS && tlv.len == 18) {
+ struct ip6_addr_t egr_addr;
+
+ if (bpf_skb_load_bytes(skb, tlv_offset + 4, &egr_addr, 16))
+ return 0;
+
+ // check if egress TLV value is correct
+ if (ntohll(egr_addr.hi) == 0xfd00000000000000 &&
+ ntohll(egr_addr.lo) == 0x4)
+ return 1;
+ }
+
+ return 0;
+}
+
+// This function will push a SRH with segments fd00::1, fd00::2, fd00::3,
+// fd00::4
+SEC("encap_srh")
+int __encap_srh(struct __sk_buff *skb)
+{
+ unsigned long long hi = 0xfd00000000000000;
+ struct ip6_addr_t *seg;
+ struct ip6_srh_t *srh;
+ char srh_buf[72]; // room for 4 segments
+ int err;
+
+ srh = (struct ip6_srh_t *)srh_buf;
+ srh->nexthdr = 0;
+ srh->hdrlen = 8;
+ srh->type = 4;
+ srh->segments_left = 3;
+ srh->first_segment = 3;
+ srh->flags = 0;
+ srh->tag = 0;
+
+ seg = (struct ip6_addr_t *)((char *)srh + sizeof(*srh));
+
+ #pragma clang loop unroll(full)
+ for (unsigned long long lo = 0; lo < 4; lo++) {
+ seg->lo = htonll(4 - lo);
+ seg->hi = htonll(hi);
+ seg = (struct ip6_addr_t *)((char *)seg + sizeof(*seg));
+ }
+
+ err = bpf_lwt_push_encap(skb, 0, (void *)srh, sizeof(srh_buf));
+ if (err)
+ return BPF_DROP;
+
+ return BPF_REDIRECT;
+}
+
+// Add an Egress TLV fc00::4, add the flag A,
+// and apply End.X action to fc42::1
+SEC("add_egr_x")
+int __add_egr_x(struct __sk_buff *skb)
+{
+ unsigned long long hi = 0xfc42000000000000;
+ unsigned long long lo = 0x1;
+ struct ip6_srh_t *srh = get_srh(skb);
+ uint8_t new_flags = SR6_FLAG_ALERT;
+ struct ip6_addr_t addr;
+ int err, offset;
+
+ if (srh == NULL)
+ return BPF_DROP;
+
+ uint8_t tlv[20] = {2, 18, 0, 0, 0xfd, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4};
+
+ err = add_tlv(skb, srh, (srh->hdrlen+1) << 3,
+ (struct sr6_tlv_t *)&tlv, 20);
+ if (err)
+ return BPF_DROP;
+
+ offset = sizeof(struct ip6_t) + offsetof(struct ip6_srh_t, flags);
+ err = bpf_lwt_seg6_store_bytes(skb, offset,
+ (void *)&new_flags, sizeof(new_flags));
+ if (err)
+ return BPF_DROP;
+
+ addr.lo = htonll(lo);
+ addr.hi = htonll(hi);
+ err = bpf_lwt_seg6_action(skb, SEG6_LOCAL_ACTION_END_X,
+ (void *)&addr, sizeof(addr));
+ if (err)
+ return BPF_DROP;
+ return BPF_REDIRECT;
+}
+
+// Pop the Egress TLV, reset the flags, change the tag 2442 and finally do a
+// simple End action
+SEC("pop_egr")
+int __pop_egr(struct __sk_buff *skb)
+{
+ struct ip6_srh_t *srh = get_srh(skb);
+ uint16_t new_tag = bpf_htons(2442);
+ uint8_t new_flags = 0;
+ int err, offset;
+
+ if (srh == NULL)
+ return BPF_DROP;
+
+ if (srh->flags != SR6_FLAG_ALERT)
+ return BPF_DROP;
+
+ if (srh->hdrlen != 11) // 4 segments + Egress TLV + Padding TLV
+ return BPF_DROP;
+
+ if (!has_egr_tlv(skb, srh))
+ return BPF_DROP;
+
+ err = delete_tlv(skb, srh, 8 + (srh->first_segment + 1) * 16);
+ if (err)
+ return BPF_DROP;
+
+ offset = sizeof(struct ip6_t) + offsetof(struct ip6_srh_t, flags);
+ if (bpf_lwt_seg6_store_bytes(skb, offset, (void *)&new_flags,
+ sizeof(new_flags)))
+ return BPF_DROP;
+
+ offset = sizeof(struct ip6_t) + offsetof(struct ip6_srh_t, tag);
+ if (bpf_lwt_seg6_store_bytes(skb, offset, (void *)&new_tag,
+ sizeof(new_tag)))
+ return BPF_DROP;
+
+ return BPF_OK;
+}
+
+// Inspect if the Egress TLV and flag have been removed, if the tag is correct,
+// then apply a End.T action to reach the last segment
+SEC("inspect_t")
+int __inspect_t(struct __sk_buff *skb)
+{
+ struct ip6_srh_t *srh = get_srh(skb);
+ int table = 117;
+ int err;
+
+ if (srh == NULL)
+ return BPF_DROP;
+
+ if (srh->flags != 0)
+ return BPF_DROP;
+
+ if (srh->tag != bpf_htons(2442))
+ return BPF_DROP;
+
+ if (srh->hdrlen != 8) // 4 segments
+ return BPF_DROP;
+
+ err = bpf_lwt_seg6_action(skb, SEG6_LOCAL_ACTION_END_T,
+ (void *)&table, sizeof(table));
+
+ if (err)
+ return BPF_DROP;
+
+ return BPF_REDIRECT;
+}
+
+char __license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/test_lwt_seg6local.sh b/tools/testing/selftests/bpf/test_lwt_seg6local.sh
new file mode 100755
index 000000000000..1c77994b5e71
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_lwt_seg6local.sh
@@ -0,0 +1,140 @@
+#!/bin/bash
+# Connects 6 network namespaces through veths.
+# Each NS may have different IPv6 global scope addresses :
+# NS1 ---- NS2 ---- NS3 ---- NS4 ---- NS5 ---- NS6
+# fb00::1 fd00::1 fd00::2 fd00::3 fb00::6
+# fc42::1 fd00::4
+#
+# All IPv6 packets going to fb00::/16 through NS2 will be encapsulated in a
+# IPv6 header with a Segment Routing Header, with segments :
+# fd00::1 -> fd00::2 -> fd00::3 -> fd00::4
+#
+# 3 fd00::/16 IPv6 addresses are binded to seg6local End.BPF actions :
+# - fd00::1 : add a TLV, change the flags and apply a End.X action to fc42::1
+# - fd00::2 : remove the TLV, change the flags, add a tag
+# - fd00::3 : apply an End.T action to fd00::4, through routing table 117
+#
+# fd00::4 is a simple Segment Routing node decapsulating the inner IPv6 packet.
+# Each End.BPF action will validate the operations applied on the SRH by the
+# previous BPF program in the chain, otherwise the packet is dropped.
+#
+# An UDP datagram is sent from fb00::1 to fb00::6. The test succeeds if this
+# datagram can be read on NS6 when binding to fb00::6.
+
+TMP_FILE="/tmp/selftest_lwt_seg6local.txt"
+
+cleanup()
+{
+ if [ "$?" = "0" ]; then
+ echo "selftests: test_lwt_seg6local [PASS]";
+ else
+ echo "selftests: test_lwt_seg6local [FAILED]";
+ fi
+
+ set +e
+ ip netns del ns1 2> /dev/null
+ ip netns del ns2 2> /dev/null
+ ip netns del ns3 2> /dev/null
+ ip netns del ns4 2> /dev/null
+ ip netns del ns5 2> /dev/null
+ ip netns del ns6 2> /dev/null
+ rm -f $TMP_FILE
+}
+
+set -e
+
+ip netns add ns1
+ip netns add ns2
+ip netns add ns3
+ip netns add ns4
+ip netns add ns5
+ip netns add ns6
+
+trap cleanup 0 2 3 6 9
+
+ip link add veth1 type veth peer name veth2
+ip link add veth3 type veth peer name veth4
+ip link add veth5 type veth peer name veth6
+ip link add veth7 type veth peer name veth8
+ip link add veth9 type veth peer name veth10
+
+ip link set veth1 netns ns1
+ip link set veth2 netns ns2
+ip link set veth3 netns ns2
+ip link set veth4 netns ns3
+ip link set veth5 netns ns3
+ip link set veth6 netns ns4
+ip link set veth7 netns ns4
+ip link set veth8 netns ns5
+ip link set veth9 netns ns5
+ip link set veth10 netns ns6
+
+ip netns exec ns1 ip link set dev veth1 up
+ip netns exec ns2 ip link set dev veth2 up
+ip netns exec ns2 ip link set dev veth3 up
+ip netns exec ns3 ip link set dev veth4 up
+ip netns exec ns3 ip link set dev veth5 up
+ip netns exec ns4 ip link set dev veth6 up
+ip netns exec ns4 ip link set dev veth7 up
+ip netns exec ns5 ip link set dev veth8 up
+ip netns exec ns5 ip link set dev veth9 up
+ip netns exec ns6 ip link set dev veth10 up
+ip netns exec ns6 ip link set dev lo up
+
+# All link scope addresses and routes required between veths
+ip netns exec ns1 ip -6 addr add fb00::12/16 dev veth1 scope link
+ip netns exec ns1 ip -6 route add fb00::21 dev veth1 scope link
+ip netns exec ns2 ip -6 addr add fb00::21/16 dev veth2 scope link
+ip netns exec ns2 ip -6 addr add fb00::34/16 dev veth3 scope link
+ip netns exec ns2 ip -6 route add fb00::43 dev veth3 scope link
+ip netns exec ns3 ip -6 route add fb00::65 dev veth5 scope link
+ip netns exec ns3 ip -6 addr add fb00::43/16 dev veth4 scope link
+ip netns exec ns3 ip -6 addr add fb00::56/16 dev veth5 scope link
+ip netns exec ns4 ip -6 addr add fb00::65/16 dev veth6 scope link
+ip netns exec ns4 ip -6 addr add fb00::78/16 dev veth7 scope link
+ip netns exec ns4 ip -6 route add fb00::87 dev veth7 scope link
+ip netns exec ns5 ip -6 addr add fb00::87/16 dev veth8 scope link
+ip netns exec ns5 ip -6 addr add fb00::910/16 dev veth9 scope link
+ip netns exec ns5 ip -6 route add fb00::109 dev veth9 scope link
+ip netns exec ns5 ip -6 route add fb00::109 table 117 dev veth9 scope link
+ip netns exec ns6 ip -6 addr add fb00::109/16 dev veth10 scope link
+
+ip netns exec ns1 ip -6 addr add fb00::1/16 dev lo
+ip netns exec ns1 ip -6 route add fb00::6 dev veth1 via fb00::21
+
+ip netns exec ns2 ip -6 route add fb00::6 encap bpf in obj test_lwt_seg6local.o sec encap_srh dev veth2
+ip netns exec ns2 ip -6 route add fd00::1 dev veth3 via fb00::43 scope link
+
+ip netns exec ns3 ip -6 route add fc42::1 dev veth5 via fb00::65
+ip netns exec ns3 ip -6 route add fd00::1 encap seg6local action End.BPF obj test_lwt_seg6local.o sec add_egr_x dev veth4
+
+ip netns exec ns4 ip -6 route add fd00::2 encap seg6local action End.BPF obj test_lwt_seg6local.o sec pop_egr dev veth6
+ip netns exec ns4 ip -6 addr add fc42::1 dev lo
+ip netns exec ns4 ip -6 route add fd00::3 dev veth7 via fb00::87
+
+ip netns exec ns5 ip -6 route add fd00::4 table 117 dev veth9 via fb00::109
+ip netns exec ns5 ip -6 route add fd00::3 encap seg6local action End.BPF obj test_lwt_seg6local.o sec inspect_t dev veth8
+
+ip netns exec ns6 ip -6 addr add fb00::6/16 dev lo
+ip netns exec ns6 ip -6 addr add fd00::4/16 dev lo
+
+ip netns exec ns1 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
+ip netns exec ns2 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
+ip netns exec ns3 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
+ip netns exec ns4 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
+ip netns exec ns5 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
+
+ip netns exec ns6 sysctl net.ipv6.conf.all.seg6_enabled=1 > /dev/null
+ip netns exec ns6 sysctl net.ipv6.conf.lo.seg6_enabled=1 > /dev/null
+ip netns exec ns6 sysctl net.ipv6.conf.veth10.seg6_enabled=1 > /dev/null
+
+ip netns exec ns6 nc -l -6 -u -d 7330 > $TMP_FILE &
+ip netns exec ns1 bash -c "echo 'foobar' | nc -w0 -6 -u -p 2121 -s fb00::1 fb00::6 7330"
+sleep 5 # wait enough time to ensure the UDP datagram arrived to the last segment
+kill -INT $!
+
+if [[ $(< $TMP_FILE) != "foobar" ]]; then
+ exit 1
+fi
+
+exit 0
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index 3ecf733330c1..0ef68204c84b 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -1542,6 +1542,162 @@ close_prog_noerr:
bpf_object__close(obj);
}
+static void test_task_fd_query_rawtp(void)
+{
+ const char *file = "./test_get_stack_rawtp.o";
+ __u64 probe_offset, probe_addr;
+ __u32 len, prog_id, fd_type;
+ struct bpf_object *obj;
+ int efd, err, prog_fd;
+ __u32 duration = 0;
+ char buf[256];
+
+ err = bpf_prog_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
+ if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
+ return;
+
+ efd = bpf_raw_tracepoint_open("sys_enter", prog_fd);
+ if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))
+ goto close_prog;
+
+ /* query (getpid(), efd) */
+ len = sizeof(buf);
+ err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
+ &fd_type, &probe_offset, &probe_addr);
+ if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err,
+ errno))
+ goto close_prog;
+
+ err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
+ strcmp(buf, "sys_enter") == 0;
+ if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n",
+ fd_type, buf))
+ goto close_prog;
+
+ /* test zero len */
+ len = 0;
+ err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
+ &fd_type, &probe_offset, &probe_addr);
+ if (CHECK(err < 0, "bpf_task_fd_query (len = 0)", "err %d errno %d\n",
+ err, errno))
+ goto close_prog;
+ err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
+ len == strlen("sys_enter");
+ if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
+ goto close_prog;
+
+ /* test empty buffer */
+ len = sizeof(buf);
+ err = bpf_task_fd_query(getpid(), efd, 0, 0, &len, &prog_id,
+ &fd_type, &probe_offset, &probe_addr);
+ if (CHECK(err < 0, "bpf_task_fd_query (buf = 0)", "err %d errno %d\n",
+ err, errno))
+ goto close_prog;
+ err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
+ len == strlen("sys_enter");
+ if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
+ goto close_prog;
+
+ /* test smaller buffer */
+ len = 3;
+ err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
+ &fd_type, &probe_offset, &probe_addr);
+ if (CHECK(err >= 0 || errno != ENOSPC, "bpf_task_fd_query (len = 3)",
+ "err %d errno %d\n", err, errno))
+ goto close_prog;
+ err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
+ len == strlen("sys_enter") &&
+ strcmp(buf, "sy") == 0;
+ if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
+ goto close_prog;
+
+ goto close_prog_noerr;
+close_prog:
+ error_cnt++;
+close_prog_noerr:
+ bpf_object__close(obj);
+}
+
+static void test_task_fd_query_tp_core(const char *probe_name,
+ const char *tp_name)
+{
+ const char *file = "./test_tracepoint.o";
+ int err, bytes, efd, prog_fd, pmu_fd;
+ struct perf_event_attr attr = {};
+ __u64 probe_offset, probe_addr;
+ __u32 len, prog_id, fd_type;
+ struct bpf_object *obj;
+ __u32 duration = 0;
+ char buf[256];
+
+ err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
+ if (CHECK(err, "bpf_prog_load", "err %d errno %d\n", err, errno))
+ goto close_prog;
+
+ snprintf(buf, sizeof(buf),
+ "/sys/kernel/debug/tracing/events/%s/id", probe_name);
+ efd = open(buf, O_RDONLY, 0);
+ if (CHECK(efd < 0, "open", "err %d errno %d\n", efd, errno))
+ goto close_prog;
+ bytes = read(efd, buf, sizeof(buf));
+ close(efd);
+ if (CHECK(bytes <= 0 || bytes >= sizeof(buf), "read",
+ "bytes %d errno %d\n", bytes, errno))
+ goto close_prog;
+
+ attr.config = strtol(buf, NULL, 0);
+ attr.type = PERF_TYPE_TRACEPOINT;
+ attr.sample_type = PERF_SAMPLE_RAW;
+ attr.sample_period = 1;
+ attr.wakeup_events = 1;
+ pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
+ 0 /* cpu 0 */, -1 /* group id */,
+ 0 /* flags */);
+ if (CHECK(err, "perf_event_open", "err %d errno %d\n", err, errno))
+ goto close_pmu;
+
+ err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
+ if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n", err,
+ errno))
+ goto close_pmu;
+
+ err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
+ if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n", err,
+ errno))
+ goto close_pmu;
+
+ /* query (getpid(), pmu_fd) */
+ len = sizeof(buf);
+ err = bpf_task_fd_query(getpid(), pmu_fd, 0, buf, &len, &prog_id,
+ &fd_type, &probe_offset, &probe_addr);
+ if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err,
+ errno))
+ goto close_pmu;
+
+ err = (fd_type == BPF_FD_TYPE_TRACEPOINT) && !strcmp(buf, tp_name);
+ if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n",
+ fd_type, buf))
+ goto close_pmu;
+
+ close(pmu_fd);
+ goto close_prog_noerr;
+
+close_pmu:
+ close(pmu_fd);
+close_prog:
+ error_cnt++;
+close_prog_noerr:
+ bpf_object__close(obj);
+}
+
+static void test_task_fd_query_tp(void)
+{
+ test_task_fd_query_tp_core("sched/sched_switch",
+ "sched_switch");
+ test_task_fd_query_tp_core("syscalls/sys_enter_read",
+ "sys_enter_read");
+}
+
int main(void)
{
jit_enabled = is_jit_enabled();
@@ -1561,6 +1717,8 @@ int main(void)
test_stacktrace_build_id_nmi();
test_stacktrace_map_raw_tp();
test_get_stack_raw_tp();
+ test_task_fd_query_rawtp();
+ test_task_fd_query_tp();
printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt);
return error_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index 94498eaf872e..4b4f015be217 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -1686,6 +1686,121 @@ static struct bpf_test tests[] = {
.prog_type = BPF_PROG_TYPE_SK_SKB,
},
{
+ "valid access family in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, family)),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "valid access remote_ip4 in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, remote_ip4)),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "valid access local_ip4 in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_ip4)),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "valid access remote_port in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, remote_port)),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "valid access local_port in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_port)),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "valid access remote_ip6 in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, remote_ip6[0])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, remote_ip6[1])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, remote_ip6[2])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, remote_ip6[3])),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_SKB,
+ },
+ {
+ "valid access local_ip6 in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_ip6[0])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_ip6[1])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_ip6[2])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_ip6[3])),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SK_SKB,
+ },
+ {
+ "invalid 64B read of family in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1,
+ offsetof(struct sk_msg_md, family)),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "invalid read past end of SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
+ offsetof(struct sk_msg_md, local_port) + 4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "R0 !read_ok",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
+ "invalid read offset in SK_MSG",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
+ offsetof(struct sk_msg_md, family) + 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_SK_MSG,
+ },
+ {
"direct packet read for SK_MSG",
.insns = {
BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1,
diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c
index 8fb4fe8686e4..3868dcb63420 100644
--- a/tools/testing/selftests/bpf/trace_helpers.c
+++ b/tools/testing/selftests/bpf/trace_helpers.c
@@ -72,6 +72,18 @@ struct ksym *ksym_search(long key)
return &syms[0];
}
+long ksym_get_addr(const char *name)
+{
+ int i;
+
+ for (i = 0; i < sym_cnt; i++) {
+ if (strcmp(syms[i].name, name) == 0)
+ return syms[i].addr;
+ }
+
+ return 0;
+}
+
static int page_size;
static int page_cnt = 8;
static struct perf_event_mmap_page *header;
diff --git a/tools/testing/selftests/bpf/trace_helpers.h b/tools/testing/selftests/bpf/trace_helpers.h
index 36d90e3b1ea9..3b4bcf7f5084 100644
--- a/tools/testing/selftests/bpf/trace_helpers.h
+++ b/tools/testing/selftests/bpf/trace_helpers.h
@@ -11,6 +11,7 @@ struct ksym {
int load_kallsyms(void);
struct ksym *ksym_search(long key);
+long ksym_get_addr(const char *name);
typedef enum bpf_perf_event_ret (*perf_event_print_fn)(void *data, int size);