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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2022 Oxide Computer Company
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <libgen.h>
#include <sys/stat.h>
#include <errno.h>
#include <err.h>
#include <assert.h>
#include <sys/sysmacros.h>
#include <stdbool.h>
#include <sys/vmm.h>
#include <sys/vmm_dev.h>
#include <sys/vmm_data.h>
#include <vmmapi.h>
#include "common.h"
static void
should_eq_u32(const char *field_name, uint32_t a, uint32_t b)
{
if (a != b) {
errx(EXIT_FAILURE, "unexpected %s %u != %u",
field_name, a, b);
}
}
int
main(int argc, char *argv[])
{
const char *suite_name = basename(argv[0]);
struct vmctx *ctx;
ctx = create_test_vm(suite_name);
if (ctx == NULL) {
errx(EXIT_FAILURE, "could not open test VM");
}
/*
* Check that vmm_data import/export facility is robust in the face of
* potentially invalid inputs
*/
const int vmfd = vm_get_device_fd(ctx);
uint8_t buf[sizeof (struct vdi_atpic_v1) + sizeof (int)];
struct vm_data_xfer vdx = {
.vdx_class = VDC_ATPIC,
.vdx_version = 1,
.vdx_len = sizeof (struct vdi_atpic_v1),
.vdx_data = buf,
};
/* Attempt a valid-sized read first */
if (ioctl(vmfd, VM_DATA_READ, &vdx) != 0) {
err(EXIT_FAILURE, "valid vmm_dat_read failed");
}
should_eq_u32("vdx_result_len", vdx.vdx_result_len,
sizeof (struct vdi_atpic_v1));
/* ... then too-small ... */
vdx.vdx_len = sizeof (struct vdi_atpic_v1) - sizeof (int);
vdx.vdx_result_len = 0;
if (ioctl(vmfd, VM_DATA_READ, &vdx) == 0) {
errx(EXIT_FAILURE, "invalid vmm_dat_read should have failed");
}
int error = errno;
if (error != ENOSPC) {
errx(EXIT_FAILURE, "expected ENOSPC errno, got %d", error);
}
/* the "correct" vdx_result_len should still be communicated out */
should_eq_u32("vdx_result_len", vdx.vdx_result_len,
sizeof (struct vdi_atpic_v1));
/*
* ... and too-big to round it out.
*
* This should pass, but still set vdx_result_len to the actual length
*/
vdx.vdx_len = sizeof (struct vdi_atpic_v1) + sizeof (int);
vdx.vdx_result_len = 0;
if (ioctl(vmfd, VM_DATA_READ, &vdx) != 0) {
err(EXIT_FAILURE, "too-large (but valid) vmm_dat_read failed");
}
should_eq_u32("vdx_result_len", vdx.vdx_result_len,
sizeof (struct vdi_atpic_v1));
/*
* The vmm_data_write paths should also be tested, but not until they
* are exposed to the general public without requring mdb -kw settings.
*/
vm_destroy(ctx);
(void) printf("%s\tPASS\n", suite_name);
return (EXIT_SUCCESS);
}
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