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// SPDX-License-Identifier: GPL-2.0+
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <linux/dcbnl.h>
#include "dcb.h"
#include "utils.h"
static void dcb_dcbx_help_set(void)
{
fprintf(stderr,
"Usage: dcb dcbx set dev STRING\n"
" [ host | lld-managed ]\n"
" [ cee | ieee ] [ static ]\n"
"\n"
);
}
static void dcb_dcbx_help_show(void)
{
fprintf(stderr,
"Usage: dcb dcbx show dev STRING\n"
"\n"
);
}
static void dcb_dcbx_help(void)
{
fprintf(stderr,
"Usage: dcb dcbx help\n"
"\n"
);
dcb_dcbx_help_show();
dcb_dcbx_help_set();
}
struct dcb_dcbx_flag {
__u8 value;
const char *key_fp;
const char *key_json;
};
static struct dcb_dcbx_flag dcb_dcbx_flags[] = {
{DCB_CAP_DCBX_HOST, "host"},
{DCB_CAP_DCBX_LLD_MANAGED, "lld-managed", "lld_managed"},
{DCB_CAP_DCBX_VER_CEE, "cee"},
{DCB_CAP_DCBX_VER_IEEE, "ieee"},
{DCB_CAP_DCBX_STATIC, "static"},
};
static void dcb_dcbx_print(__u8 dcbx)
{
int bit;
int i;
while ((bit = ffs(dcbx))) {
bool found = false;
bit--;
for (i = 0; i < ARRAY_SIZE(dcb_dcbx_flags); i++) {
struct dcb_dcbx_flag *flag = &dcb_dcbx_flags[i];
if (flag->value == 1 << bit) {
print_bool(PRINT_JSON, flag->key_json ?: flag->key_fp,
NULL, true);
print_string(PRINT_FP, NULL, "%s ", flag->key_fp);
found = true;
break;
}
}
if (!found)
fprintf(stderr, "Unknown DCBX bit %#x.\n", 1 << bit);
dcbx &= ~(1 << bit);
}
print_nl();
}
static int dcb_dcbx_get(struct dcb *dcb, const char *dev, __u8 *dcbx)
{
__u16 payload_len;
void *payload;
int err;
err = dcb_get_attribute_bare(dcb, DCB_CMD_IEEE_GET, dev, DCB_ATTR_DCBX,
&payload, &payload_len);
if (err != 0)
return err;
if (payload_len != 1) {
fprintf(stderr, "DCB_ATTR_DCBX payload has size %d, expected 1.\n",
payload_len);
return -EINVAL;
}
*dcbx = *(__u8 *) payload;
return 0;
}
static int dcb_dcbx_set(struct dcb *dcb, const char *dev, __u8 dcbx)
{
return dcb_set_attribute_bare(dcb, DCB_CMD_SDCBX, dev, DCB_ATTR_DCBX,
&dcbx, 1, DCB_ATTR_DCBX);
}
static int dcb_cmd_dcbx_set(struct dcb *dcb, const char *dev, int argc, char **argv)
{
__u8 dcbx = 0;
__u8 i;
if (!argc) {
dcb_dcbx_help_set();
return 0;
}
do {
if (matches(*argv, "help") == 0) {
dcb_dcbx_help_set();
return 0;
}
for (i = 0; i < ARRAY_SIZE(dcb_dcbx_flags); i++) {
struct dcb_dcbx_flag *flag = &dcb_dcbx_flags[i];
if (matches(*argv, flag->key_fp) == 0) {
dcbx |= flag->value;
NEXT_ARG_FWD();
goto next;
}
}
fprintf(stderr, "What is \"%s\"?\n", *argv);
dcb_dcbx_help_set();
return -EINVAL;
next:
;
} while (argc > 0);
return dcb_dcbx_set(dcb, dev, dcbx);
}
static int dcb_cmd_dcbx_show(struct dcb *dcb, const char *dev, int argc, char **argv)
{
__u8 dcbx;
int ret;
ret = dcb_dcbx_get(dcb, dev, &dcbx);
if (ret != 0)
return ret;
while (argc > 0) {
if (matches(*argv, "help") == 0) {
dcb_dcbx_help_show();
return 0;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
dcb_dcbx_help_show();
return -EINVAL;
}
NEXT_ARG_FWD();
}
open_json_object(NULL);
dcb_dcbx_print(dcbx);
close_json_object();
return 0;
}
int dcb_cmd_dcbx(struct dcb *dcb, int argc, char **argv)
{
if (!argc || matches(*argv, "help") == 0) {
dcb_dcbx_help();
return 0;
} else if (matches(*argv, "show") == 0) {
NEXT_ARG_FWD();
return dcb_cmd_parse_dev(dcb, argc, argv,
dcb_cmd_dcbx_show, dcb_dcbx_help_show);
} else if (matches(*argv, "set") == 0) {
NEXT_ARG_FWD();
return dcb_cmd_parse_dev(dcb, argc, argv,
dcb_cmd_dcbx_set, dcb_dcbx_help_set);
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
dcb_dcbx_help();
return -EINVAL;
}
}
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