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qemu-patch-raspberry4/tests/virtio-scsi-test.c
Kevin Wolf edbe36ad0f virtio-scsi-test: Test attaching new overlay with iothreads 
This tests that blockdev-add can correctly add a qcow2 overlay to an
image used by a virtio-scsi disk in an iothread. The interesting point
here is whether the newly added node gets correctly moved into the
iothread AioContext.

If it isn't, we get an assertion failure in virtio-scsi while processing
the next request:

    virtio_scsi_ctx_check: Assertion `blk_get_aio_context(d->conf.blk) == s->ctx' failed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-06-04 16:54:51 +02:00

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/*
* QTest testcase for VirtIO SCSI
*
* Copyright (c) 2014 SUSE LINUX Products GmbH
* Copyright (c) 2015 Red Hat Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "libqtest.h"
#include "scsi/constants.h"
#include "libqos/libqos-pc.h"
#include "libqos/libqos-spapr.h"
#include "libqos/virtio.h"
#include "libqos/virtio-pci.h"
#include "standard-headers/linux/virtio_ids.h"
#include "standard-headers/linux/virtio_pci.h"
#include "standard-headers/linux/virtio_scsi.h"
#include "libqos/virtio-scsi.h"
#include "libqos/qgraph.h"
#define PCI_SLOT 0x02
#define PCI_FN 0x00
#define QVIRTIO_SCSI_TIMEOUT_US (1 * 1000 * 1000)
#define MAX_NUM_QUEUES 64
typedef struct {
QVirtioDevice *dev;
int num_queues;
QVirtQueue *vq[MAX_NUM_QUEUES + 2];
} QVirtioSCSIQueues;
static QGuestAllocator *alloc;
static void qvirtio_scsi_pci_free(QVirtioSCSIQueues *vs)
{
int i;
for (i = 0; i < vs->num_queues + 2; i++) {
qvirtqueue_cleanup(vs->dev->bus, vs->vq[i], alloc);
}
g_free(vs);
}
static uint64_t qvirtio_scsi_alloc(QVirtioSCSIQueues *vs, size_t alloc_size,
const void *data)
{
uint64_t addr;
addr = guest_alloc(alloc, alloc_size);
if (data) {
memwrite(addr, data, alloc_size);
}
return addr;
}
static uint8_t virtio_scsi_do_command(QVirtioSCSIQueues *vs,
const uint8_t *cdb,
const uint8_t *data_in,
size_t data_in_len,
uint8_t *data_out, size_t data_out_len,
struct virtio_scsi_cmd_resp *resp_out)
{
QVirtQueue *vq;
struct virtio_scsi_cmd_req req = { { 0 } };
struct virtio_scsi_cmd_resp resp = { .response = 0xff, .status = 0xff };
uint64_t req_addr, resp_addr, data_in_addr = 0, data_out_addr = 0;
uint8_t response;
uint32_t free_head;
vq = vs->vq[2];
req.lun[0] = 1; /* Select LUN */
req.lun[1] = 1; /* Select target 1 */
memcpy(req.cdb, cdb, VIRTIO_SCSI_CDB_SIZE);
/* XXX: Fix endian if any multi-byte field in req/resp is used */
/* Add request header */
req_addr = qvirtio_scsi_alloc(vs, sizeof(req), &req);
free_head = qvirtqueue_add(vq, req_addr, sizeof(req), false, true);
if (data_out_len) {
data_out_addr = qvirtio_scsi_alloc(vs, data_out_len, data_out);
qvirtqueue_add(vq, data_out_addr, data_out_len, false, true);
}
/* Add response header */
resp_addr = qvirtio_scsi_alloc(vs, sizeof(resp), &resp);
qvirtqueue_add(vq, resp_addr, sizeof(resp), true, !!data_in_len);
if (data_in_len) {
data_in_addr = qvirtio_scsi_alloc(vs, data_in_len, data_in);
qvirtqueue_add(vq, data_in_addr, data_in_len, true, false);
}
qvirtqueue_kick(vs->dev, vq, free_head);
qvirtio_wait_used_elem(vs->dev, vq, free_head, NULL,
QVIRTIO_SCSI_TIMEOUT_US);
response = readb(resp_addr +
offsetof(struct virtio_scsi_cmd_resp, response));
if (resp_out) {
memread(resp_addr, resp_out, sizeof(*resp_out));
}
guest_free(alloc, req_addr);
guest_free(alloc, resp_addr);
guest_free(alloc, data_in_addr);
guest_free(alloc, data_out_addr);
return response;
}
static QVirtioSCSIQueues *qvirtio_scsi_init(QVirtioDevice *dev)
{
QVirtioSCSIQueues *vs;
const uint8_t test_unit_ready_cdb[VIRTIO_SCSI_CDB_SIZE] = {};
struct virtio_scsi_cmd_resp resp;
int i;
vs = g_new0(QVirtioSCSIQueues, 1);
vs->dev = dev;
vs->num_queues = qvirtio_config_readl(dev, 0);
g_assert_cmpint(vs->num_queues, <, MAX_NUM_QUEUES);
for (i = 0; i < vs->num_queues + 2; i++) {
vs->vq[i] = qvirtqueue_setup(dev, alloc, i);
}
/* Clear the POWER ON OCCURRED unit attention */
g_assert_cmpint(virtio_scsi_do_command(vs, test_unit_ready_cdb,
NULL, 0, NULL, 0, &resp),
==, 0);
g_assert_cmpint(resp.status, ==, CHECK_CONDITION);
g_assert_cmpint(resp.sense[0], ==, 0x70); /* Fixed format sense buffer */
g_assert_cmpint(resp.sense[2], ==, UNIT_ATTENTION);
g_assert_cmpint(resp.sense[12], ==, 0x29); /* POWER ON */
g_assert_cmpint(resp.sense[13], ==, 0x00);
return vs;
}
static void hotplug(void *obj, void *data, QGuestAllocator *alloc)
{
qtest_qmp_device_add("scsi-hd", "scsihd", "{'drive': 'drv1'}");
qtest_qmp_device_del("scsihd");
}
/* Test WRITE SAME with the lba not aligned */
static void test_unaligned_write_same(void *obj, void *data,
QGuestAllocator *t_alloc)
{
QVirtioSCSI *scsi = obj;
QVirtioSCSIQueues *vs;
uint8_t buf1[512] = { 0 };
uint8_t buf2[512] = { 1 };
const uint8_t write_same_cdb_1[VIRTIO_SCSI_CDB_SIZE] = {
0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x02, 0x00
};
const uint8_t write_same_cdb_2[VIRTIO_SCSI_CDB_SIZE] = {
0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
};
const uint8_t write_same_cdb_ndob[VIRTIO_SCSI_CDB_SIZE] = {
0x41, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
};
alloc = t_alloc;
vs = qvirtio_scsi_init(scsi->vdev);
g_assert_cmphex(0, ==,
virtio_scsi_do_command(vs, write_same_cdb_1, NULL, 0, buf1, 512,
NULL));
g_assert_cmphex(0, ==,
virtio_scsi_do_command(vs, write_same_cdb_2, NULL, 0, buf2, 512,
NULL));
g_assert_cmphex(0, ==,
virtio_scsi_do_command(vs, write_same_cdb_ndob, NULL, 0, NULL, 0,
NULL));
qvirtio_scsi_pci_free(vs);
}
static void test_iothread_attach_node(void *obj, void *data,
QGuestAllocator *t_alloc)
{
QVirtioSCSIPCI *scsi_pci = obj;
QVirtioSCSI *scsi = &scsi_pci->scsi;
QVirtioSCSIQueues *vs;
char tmp_path[] = "/tmp/qtest.XXXXXX";
int fd;
int ret;
uint8_t buf[512] = { 0 };
const uint8_t write_cdb[VIRTIO_SCSI_CDB_SIZE] = {
/* WRITE(10) to LBA 0, transfer length 1 */
0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00
};
alloc = t_alloc;
vs = qvirtio_scsi_init(scsi->vdev);
/* Create a temporary qcow2 overlay*/
fd = mkstemp(tmp_path);
g_assert(fd >= 0);
close(fd);
if (!have_qemu_img()) {
g_test_message("QTEST_QEMU_IMG not set or qemu-img missing; "
"skipping snapshot test");
goto fail;
}
mkqcow2(tmp_path, 64);
/* Attach the overlay to the null0 node */
qmp_assert_success("{'execute': 'blockdev-add', 'arguments': {"
" 'driver': 'qcow2', 'node-name': 'overlay',"
" 'backing': 'null0', 'file': {"
" 'driver': 'file', 'filename': %s}}}", tmp_path);
/* Send a request to see if the AioContext is still right */
ret = virtio_scsi_do_command(vs, write_cdb, NULL, 0, buf, 512, NULL);
g_assert_cmphex(ret, ==, 0);
fail:
qvirtio_scsi_pci_free(vs);
unlink(tmp_path);
}
static void *virtio_scsi_hotplug_setup(GString *cmd_line, void *arg)
{
g_string_append(cmd_line,
" -drive id=drv1,if=none,file=null-co://,format=raw");
return arg;
}
static void *virtio_scsi_setup(GString *cmd_line, void *arg)
{
g_string_append(cmd_line,
" -drive file=blkdebug::null-co://,"
"if=none,id=dr1,format=raw,file.align=4k "
"-device scsi-hd,drive=dr1,lun=0,scsi-id=1");
return arg;
}
static void *virtio_scsi_setup_iothread(GString *cmd_line, void *arg)
{
g_string_append(cmd_line,
" -object iothread,id=thread0"
" -blockdev driver=null-co,node-name=null0"
" -device scsi-hd,drive=null0");
return arg;
}
static void register_virtio_scsi_test(void)
{
QOSGraphTestOptions opts = { };
opts.before = virtio_scsi_hotplug_setup;
qos_add_test("hotplug", "virtio-scsi", hotplug, &opts);
opts.before = virtio_scsi_setup;
qos_add_test("unaligned-write-same", "virtio-scsi",
test_unaligned_write_same, &opts);
opts.before = virtio_scsi_setup_iothread;
opts.edge = (QOSGraphEdgeOptions) {
.extra_device_opts = "iothread=thread0",
};
qos_add_test("iothread-attach-node", "virtio-scsi-pci",
test_iothread_attach_node, &opts);
}
libqos_init(register_virtio_scsi_test);
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