tools: bpftool: add "bpftool map freeze" subcommand
Add a new subcommand to freeze maps from user space.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index af2e9eb..de61d73 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -1262,6 +1262,35 @@ static int do_pop_dequeue(int argc, char **argv)
return err;
}
+static int do_freeze(int argc, char **argv)
+{
+ int err, fd;
+
+ if (!REQ_ARGS(2))
+ return -1;
+
+ fd = map_parse_fd(&argc, &argv);
+ if (fd < 0)
+ return -1;
+
+ if (argc) {
+ close(fd);
+ return BAD_ARG();
+ }
+
+ err = bpf_map_freeze(fd);
+ close(fd);
+ if (err) {
+ p_err("failed to freeze map: %s", strerror(errno));
+ return err;
+ }
+
+ if (json_output)
+ jsonw_null(json_wtr);
+
+ return 0;
+}
+
static int do_help(int argc, char **argv)
{
if (json_output) {
@@ -1286,6 +1315,7 @@ static int do_help(int argc, char **argv)
" %s %s pop MAP\n"
" %s %s enqueue MAP value VALUE\n"
" %s %s dequeue MAP\n"
+ " %s %s freeze MAP\n"
" %s %s help\n"
"\n"
" " HELP_SPEC_MAP "\n"
@@ -1304,7 +1334,8 @@ static int do_help(int argc, char **argv)
bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
- bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2]);
+ bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
+ bin_name, argv[-2]);
return 0;
}
@@ -1326,6 +1357,7 @@ static const struct cmd cmds[] = {
{ "enqueue", do_update },
{ "pop", do_pop_dequeue },
{ "dequeue", do_pop_dequeue },
+ { "freeze", do_freeze },
{ 0 }
};
