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// SPDX-License-Identifier: GPL-2.0-only
#include <stdio.h>
#include <stdlib.h>
#include "../../../kselftest.h"
#include <libvfio.h>
static bool is_bdf(const char *str)
{
unsigned int s, b, d, f;
int length, count;
count = sscanf(str, "%4x:%2x:%2x.%2x%n", &s, &b, &d, &f, &length);
return count == 4 && length == strlen(str);
}
static char **get_bdfs_cmdline(int *argc, char *argv[], int *nr_bdfs)
{
int i;
for (i = *argc - 1; i > 0 && is_bdf(argv[i]); i--)
continue;
i++;
*nr_bdfs = *argc - i;
*argc -= *nr_bdfs;
return *nr_bdfs ? &argv[i] : NULL;
}
static char *get_bdf_env(void)
{
char *bdf;
bdf = getenv("VFIO_SELFTESTS_BDF");
if (!bdf)
return NULL;
VFIO_ASSERT_TRUE(is_bdf(bdf), "Invalid BDF: %s\n", bdf);
return bdf;
}
char **vfio_selftests_get_bdfs(int *argc, char *argv[], int *nr_bdfs)
{
static char *env_bdf;
char **bdfs;
bdfs = get_bdfs_cmdline(argc, argv, nr_bdfs);
if (bdfs)
return bdfs;
env_bdf = get_bdf_env();
if (env_bdf) {
*nr_bdfs = 1;
return &env_bdf;
}
fprintf(stderr, "Unable to determine which device(s) to use, skipping test.\n");
fprintf(stderr, "\n");
fprintf(stderr, "To pass the device address via environment variable:\n");
fprintf(stderr, "\n");
fprintf(stderr, " export VFIO_SELFTESTS_BDF=\"segment:bus:device.function\"\n");
fprintf(stderr, " %s [options]\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "To pass the device address(es) via argv:\n");
fprintf(stderr, "\n");
fprintf(stderr, " %s [options] segment:bus:device.function ...\n", argv[0]);
fprintf(stderr, "\n");
exit(KSFT_SKIP);
}
const char *vfio_selftests_get_bdf(int *argc, char *argv[])
{
int nr_bdfs;
return vfio_selftests_get_bdfs(argc, argv, &nr_bdfs)[0];
}
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