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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Helpers for handling qevents.
*/
#include <stdio.h>
#include <string.h>
#include "tc_qevent.h"
#include "utils.h"
void qevents_init(struct qevent_util *qevents)
{
if (!qevents)
return;
for (; qevents->id; qevents++)
memset(qevents->data, 0, qevents->data_size);
}
int qevent_parse(struct qevent_util *qevents, int *p_argc, char ***p_argv)
{
char **argv = *p_argv;
int argc = *p_argc;
const char *name = *argv;
int err;
if (!qevents)
goto out;
for (; qevents->id; qevents++) {
if (strcmp(name, qevents->id) == 0) {
NEXT_ARG();
err = qevents->parse_qevent(qevents, &argc, &argv);
if (err)
return err;
*p_argc = argc;
*p_argv = argv;
return 0;
}
}
out:
fprintf(stderr, "Unknown qevent `%s'\n", name);
return -1;
}
int qevents_read(struct qevent_util *qevents, struct rtattr **tb)
{
int err;
if (!qevents)
return 0;
for (; qevents->id; qevents++) {
if (tb[qevents->attr]) {
err = qevents->read_qevent(qevents, tb);
if (err)
return err;
}
}
return 0;
}
void qevents_print(struct qevent_util *qevents, FILE *f)
{
int first = true;
if (!qevents)
return;
for (; qevents->id; qevents++) {
struct qevent_base *qeb = qevents->data;
if (qeb->block_idx) {
if (first) {
open_json_array(PRINT_JSON, "qevents");
first = false;
}
open_json_object(NULL);
print_string(PRINT_ANY, "kind", "qevent %s", qevents->id);
qevents->print_qevent(qevents, f);
print_string(PRINT_FP, NULL, "%s", " ");
close_json_object();
}
}
if (!first)
close_json_array(PRINT_ANY, "");
}
bool qevents_have_block(struct qevent_util *qevents, __u32 block_idx)
{
if (!qevents)
return false;
for (; qevents->id; qevents++) {
struct qevent_base *qeb = qevents->data;
if (qeb->block_idx == block_idx)
return true;
}
return false;
}
int qevents_dump(struct qevent_util *qevents, struct nlmsghdr *n)
{
int err;
if (!qevents)
return 0;
for (; qevents->id; qevents++) {
struct qevent_base *qeb = qevents->data;
if (qeb->block_idx) {
err = qevents->dump_qevent(qevents, n);
if (err)
return err;
}
}
return 0;
}
static int parse_block_idx(const char *arg, struct qevent_base *qeb)
{
if (qeb->block_idx) {
fprintf(stderr, "Qevent block index already specified\n");
return -1;
}
if (get_unsigned(&qeb->block_idx, arg, 10) || !qeb->block_idx) {
fprintf(stderr, "Illegal qevent block index\n");
return -1;
}
return 0;
}
static int read_block_idx(struct rtattr *attr, struct qevent_base *qeb)
{
if (qeb->block_idx) {
fprintf(stderr, "Qevent block index already specified\n");
return -1;
}
qeb->block_idx = rta_getattr_u32(attr);
if (!qeb->block_idx) {
fprintf(stderr, "Illegal qevent block index\n");
return -1;
}
return 0;
}
static void print_block_idx(FILE *f, __u32 block_idx)
{
print_uint(PRINT_ANY, "block", " block %u", block_idx);
}
int qevent_parse_plain(struct qevent_util *qu, int *p_argc, char ***p_argv)
{
struct qevent_plain *qe = qu->data;
char **argv = *p_argv;
int argc = *p_argc;
if (qe->base.block_idx) {
fprintf(stderr, "Duplicate qevent\n");
return -1;
}
while (argc > 0) {
if (strcmp(*argv, "block") == 0) {
NEXT_ARG();
if (parse_block_idx(*argv, &qe->base))
return -1;
} else {
break;
}
NEXT_ARG_FWD();
}
if (!qe->base.block_idx) {
fprintf(stderr, "Unspecified qevent block index\n");
return -1;
}
*p_argc = argc;
*p_argv = argv;
return 0;
}
int qevent_read_plain(struct qevent_util *qu, struct rtattr **tb)
{
struct qevent_plain *qe = qu->data;
return read_block_idx(tb[qu->attr], &qe->base);
}
void qevent_print_plain(struct qevent_util *qu, FILE *f)
{
struct qevent_plain *qe = qu->data;
print_block_idx(f, qe->base.block_idx);
}
int qevent_dump_plain(struct qevent_util *qu, struct nlmsghdr *n)
{
struct qevent_plain *qe = qu->data;
return addattr32(n, 1024, qu->attr, qe->base.block_idx);
}
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