From: Quentin Monnet <quentin.monnet@netronome.com>
Date: Mon, 23 Oct 2017 09:24:12 -0700
Subject: tools: bpftool: add JSON output for `bpftool batch file FILE` command
Patch-mainline: v4.15-rc1
Git-commit: 3aaca6bf7a09150e4c87f2932dc8ebe82a586252
References: bsc#1109837
`bpftool batch file FILE` takes FILE as an argument and executes all the
bpftool commands it finds inside (or stops if an error occurs).
To obtain a consistent JSON output, create a root JSON array, then for
each command create a new object containing two fields: one with the
command arguments, the other with the output (which is the JSON object
that the command would have produced, if called on its own).
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
tools/bpf/bpftool/main.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -155,6 +155,7 @@ static int do_batch(int argc, char **arg
int n_argc;
FILE *fp;
int err;
+ int i;
if (argc < 2) {
err("too few parameters for batch\n");
@@ -174,6 +175,8 @@ static int do_batch(int argc, char **arg
return -1;
}
+ if (json_output)
+ jsonw_start_array(json_wtr);
while (fgets(buf, sizeof(buf), fp)) {
if (strlen(buf) == sizeof(buf) - 1) {
errno = E2BIG;
@@ -197,7 +200,21 @@ static int do_batch(int argc, char **arg
if (!n_argc)
continue;
+ if (json_output) {
+ jsonw_start_object(json_wtr);
+ jsonw_name(json_wtr, "command");
+ jsonw_start_array(json_wtr);
+ for (i = 0; i < n_argc; i++)
+ jsonw_string(json_wtr, n_argv[i]);
+ jsonw_end_array(json_wtr);
+ jsonw_name(json_wtr, "output");
+ }
+
err = cmd_select(cmds, n_argc, n_argv, do_help);
+
+ if (json_output)
+ jsonw_end_object(json_wtr);
+
if (err)
goto err_close;
@@ -214,6 +231,9 @@ static int do_batch(int argc, char **arg
err_close:
fclose(fp);
+ if (json_output)
+ jsonw_end_array(json_wtr);
+
return err;
}