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qemu/tests/virtio-9p-test.c

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/*
* QTest testcase for VirtIO 9P
*
* Copyright (c) 2014 SUSE LINUX Products GmbH
*
* 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 "qemu-common.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 "hw/9pfs/9p.h"
static const char mount_tag[] = "qtest";
typedef struct {
QVirtioDevice *dev;
QOSState *qs;
QVirtQueue *vq;
char *test_share;
uint16_t p9_req_tag;
} QVirtIO9P;
static QVirtIO9P *qvirtio_9p_start(const char *driver)
{
const char *arch = qtest_get_arch();
const char *cmd = "-fsdev local,id=fsdev0,security_model=none,path=%s "
"-device %s,fsdev=fsdev0,mount_tag=%s";
QVirtIO9P *v9p = g_new0(QVirtIO9P, 1);
v9p->test_share = g_strdup("/tmp/qtest.XXXXXX");
g_assert_nonnull(mkdtemp(v9p->test_share));
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
v9p->qs = qtest_pc_boot(cmd, v9p->test_share, driver, mount_tag);
} else if (strcmp(arch, "ppc64") == 0) {
v9p->qs = qtest_spapr_boot(cmd, v9p->test_share, driver, mount_tag);
} else {
g_printerr("virtio-9p tests are only available on x86 or ppc64\n");
exit(EXIT_FAILURE);
}
return v9p;
}
static void qvirtio_9p_stop(QVirtIO9P *v9p)
{
qtest_shutdown(v9p->qs);
rmdir(v9p->test_share);
g_free(v9p->test_share);
g_free(v9p);
}
static QVirtIO9P *qvirtio_9p_pci_start(void)
{
QVirtIO9P *v9p = qvirtio_9p_start("virtio-9p-pci");
QVirtioPCIDevice *dev = qvirtio_pci_device_find(v9p->qs->pcibus,
VIRTIO_ID_9P);
g_assert_nonnull(dev);
g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_9P);
v9p->dev = (QVirtioDevice *) dev;
qvirtio_pci_device_enable(dev);
qvirtio_reset(v9p->dev);
qvirtio_set_acknowledge(v9p->dev);
qvirtio_set_driver(v9p->dev);
v9p->vq = qvirtqueue_setup(v9p->dev, v9p->qs->alloc, 0);
return v9p;
}
static void qvirtio_9p_pci_stop(QVirtIO9P *v9p)
{
qvirtqueue_cleanup(v9p->dev->bus, v9p->vq, v9p->qs->alloc);
qvirtio_pci_device_disable(container_of(v9p->dev, QVirtioPCIDevice, vdev));
qvirtio_pci_device_free((QVirtioPCIDevice *)v9p->dev);
qvirtio_9p_stop(v9p);
}
static void pci_config(QVirtIO9P *v9p)
{
size_t tag_len = qvirtio_config_readw(v9p->dev, 0);
char *tag;
int i;
g_assert_cmpint(tag_len, ==, strlen(mount_tag));
tag = g_malloc(tag_len);
for (i = 0; i < tag_len; i++) {
tag[i] = qvirtio_config_readb(v9p->dev, i + 2);
}
g_assert_cmpmem(tag, tag_len, mount_tag, tag_len);
g_free(tag);
}
#define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */
typedef struct {
QVirtIO9P *v9p;
uint16_t tag;
uint64_t t_msg;
uint32_t t_size;
uint64_t r_msg;
/* No r_size, it is hardcoded to P9_MAX_SIZE */
size_t t_off;
size_t r_off;
} P9Req;
static void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
{
memwrite(req->t_msg + req->t_off, addr, len);
req->t_off += len;
}
static void v9fs_memskip(P9Req *req, size_t len)
{
req->r_off += len;
}
static void v9fs_memrewind(P9Req *req, size_t len)
{
req->r_off -= len;
}
static void v9fs_memread(P9Req *req, void *addr, size_t len)
{
memread(req->r_msg + req->r_off, addr, len);
req->r_off += len;
}
static void v9fs_uint16_write(P9Req *req, uint16_t val)
{
uint16_t le_val = cpu_to_le16(val);
v9fs_memwrite(req, &le_val, 2);
}
static void v9fs_uint16_read(P9Req *req, uint16_t *val)
{
v9fs_memread(req, val, 2);
le16_to_cpus(val);
}
static void v9fs_uint32_write(P9Req *req, uint32_t val)
{
uint32_t le_val = cpu_to_le32(val);
v9fs_memwrite(req, &le_val, 4);
}
static void v9fs_uint32_read(P9Req *req, uint32_t *val)
{
v9fs_memread(req, val, 4);
le32_to_cpus(val);
}
/* len[2] string[len] */
static uint16_t v9fs_string_size(const char *string)
{
size_t len = strlen(string);
g_assert_cmpint(len, <=, UINT16_MAX);
return 2 + len;
}
static void v9fs_string_write(P9Req *req, const char *string)
{
int len = strlen(string);
g_assert_cmpint(len, <=, UINT16_MAX);
v9fs_uint16_write(req, (uint16_t) len);
v9fs_memwrite(req, string, len);
}
static void v9fs_string_read(P9Req *req, uint16_t *len, char **string)
{
uint16_t local_len;
v9fs_uint16_read(req, &local_len);
if (len) {
*len = local_len;
}
if (string) {
*string = g_malloc(local_len);
v9fs_memread(req, *string, local_len);
} else {
v9fs_memskip(req, local_len);
}
}
typedef struct {
uint32_t size;
uint8_t id;
uint16_t tag;
} QEMU_PACKED P9Hdr;
static P9Req *v9fs_req_init(QVirtIO9P *v9p, uint32_t size, uint8_t id,
uint16_t tag)
{
P9Req *req = g_new0(P9Req, 1);
uint32_t t_size = 7 + size; /* 9P header has well-known size of 7 bytes */
P9Hdr hdr = {
.size = cpu_to_le32(t_size),
.id = id,
.tag = cpu_to_le16(tag)
};
g_assert_cmpint(t_size, <=, P9_MAX_SIZE);
req->v9p = v9p;
req->t_size = t_size;
req->t_msg = guest_alloc(v9p->qs->alloc, req->t_size);
v9fs_memwrite(req, &hdr, 7);
req->tag = tag;
return req;
}
static void v9fs_req_send(P9Req *req)
{
QVirtIO9P *v9p = req->v9p;
uint32_t free_head;
req->r_msg = guest_alloc(v9p->qs->alloc, P9_MAX_SIZE);
free_head = qvirtqueue_add(v9p->vq, req->t_msg, req->t_size, false, true);
qvirtqueue_add(v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
qvirtqueue_kick(v9p->dev, v9p->vq, free_head);
req->t_off = 0;
}
static const char *rmessage_name(uint8_t id)
{
return
id == P9_RLERROR ? "RLERROR" :
id == P9_RVERSION ? "RVERSION" :
id == P9_RATTACH ? "RATTACH" :
id == P9_RWALK ? "RWALK" :
"<unknown>";
}
static void v9fs_req_recv(P9Req *req, uint8_t id)
{
QVirtIO9P *v9p = req->v9p;
P9Hdr hdr;
int i;
for (i = 0; i < 10; i++) {
qvirtio_wait_queue_isr(v9p->dev, v9p->vq, 1000 * 1000);
v9fs_memread(req, &hdr, 7);
hdr.size = ldl_le_p(&hdr.size);
hdr.tag = lduw_le_p(&hdr.tag);
if (hdr.size >= 7) {
break;
}
v9fs_memrewind(req, 7);
}
g_assert_cmpint(hdr.size, >=, 7);
g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
g_assert_cmpint(hdr.tag, ==, req->tag);
if (hdr.id != id) {
g_printerr("Received response %d (%s) instead of %d (%s)\n",
hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
if (hdr.id == P9_RLERROR) {
uint32_t err;
v9fs_uint32_read(req, &err);
g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
}
}
g_assert_cmpint(hdr.id, ==, id);
}
static void v9fs_req_free(P9Req *req)
{
QVirtIO9P *v9p = req->v9p;
guest_free(v9p->qs->alloc, req->t_msg);
guest_free(v9p->qs->alloc, req->r_msg);
g_free(req);
}
/* size[4] Rlerror tag[2] ecode[4] */
static void v9fs_rlerror(P9Req *req, uint32_t *err)
{
v9fs_req_recv(req, P9_RLERROR);
v9fs_uint32_read(req, err);
v9fs_req_free(req);
}
/* size[4] Tversion tag[2] msize[4] version[s] */
static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version)
{
P9Req *req = v9fs_req_init(v9p, 4 + v9fs_string_size(version), P9_TVERSION,
P9_NOTAG);
v9fs_uint32_write(req, msize);
v9fs_string_write(req, version);
v9fs_req_send(req);
return req;
}
/* size[4] Rversion tag[2] msize[4] version[s] */
static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
{
uint32_t msize;
v9fs_req_recv(req, P9_RVERSION);
v9fs_uint32_read(req, &msize);
g_assert_cmpint(msize, ==, P9_MAX_SIZE);
if (len || version) {
v9fs_string_read(req, len, version);
}
v9fs_req_free(req);
}
/* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname)
{
const char *uname = ""; /* ignored by QEMU */
const char *aname = ""; /* ignored by QEMU */
P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH,
++(v9p->p9_req_tag));
v9fs_uint32_write(req, fid);
v9fs_uint32_write(req, P9_NOFID);
v9fs_string_write(req, uname);
v9fs_string_write(req, aname);
v9fs_uint32_write(req, n_uname);
v9fs_req_send(req);
return req;
}
typedef char v9fs_qid[13];
/* size[4] Rattach tag[2] qid[13] */
static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
{
v9fs_req_recv(req, P9_RATTACH);
if (qid) {
v9fs_memread(req, qid, 13);
}
v9fs_req_free(req);
}
/* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
static P9Req *v9fs_twalk(QVirtIO9P *v9p, uint32_t fid, uint32_t newfid,
uint16_t nwname, char *const wnames[])
{
P9Req *req;
int i;
uint32_t size = 4 + 4 + 2;
for (i = 0; i < nwname; i++) {
size += v9fs_string_size(wnames[i]);
}
req = v9fs_req_init(v9p, size, P9_TWALK, ++(v9p->p9_req_tag));
v9fs_uint32_write(req, fid);
v9fs_uint32_write(req, newfid);
v9fs_uint16_write(req, nwname);
for (i = 0; i < nwname; i++) {
v9fs_string_write(req, wnames[i]);
}
v9fs_req_send(req);
return req;
}
/* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
{
uint16_t local_nwqid;
v9fs_req_recv(req, P9_RWALK);
v9fs_uint16_read(req, &local_nwqid);
if (nwqid) {
*nwqid = local_nwqid;
}
if (wqid) {
*wqid = g_malloc(local_nwqid * 13);
v9fs_memread(req, *wqid, local_nwqid * 13);
}
v9fs_req_free(req);
}
static void fs_version(QVirtIO9P *v9p)
{
const char *version = "9P2000.L";
uint16_t server_len;
char *server_version;
P9Req *req;
req = v9fs_tversion(v9p, P9_MAX_SIZE, version);
v9fs_rversion(req, &server_len, &server_version);
g_assert_cmpmem(server_version, server_len, version, strlen(version));
g_free(server_version);
}
static void fs_attach(QVirtIO9P *v9p)
{
P9Req *req;
fs_version(v9p);
req = v9fs_tattach(v9p, 0, getuid());
v9fs_rattach(req, NULL);
}
static void fs_walk(QVirtIO9P *v9p)
{
char *wnames[P9_MAXWELEM], *paths[P9_MAXWELEM];
char *last_path = v9p->test_share;
uint16_t nwqid;
v9fs_qid *wqid;
int i;
P9Req *req;
for (i = 0; i < P9_MAXWELEM; i++) {
wnames[i] = g_strdup_printf("%s%d", __func__, i);
last_path = paths[i] = g_strdup_printf("%s/%s", last_path, wnames[i]);
g_assert(!mkdir(paths[i], 0700));
}
fs_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames);
v9fs_rwalk(req, &nwqid, &wqid);
g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
for (i = 0; i < P9_MAXWELEM; i++) {
rmdir(paths[P9_MAXWELEM - i - 1]);
g_free(paths[P9_MAXWELEM - i - 1]);
g_free(wnames[i]);
}
g_free(wqid);
}
static void fs_walk_no_slash(QVirtIO9P *v9p)
{
char *const wnames[] = { g_strdup(" /") };
P9Req *req;
uint32_t err;
fs_attach(v9p);
req = v9fs_twalk(v9p, 0, 1, 1, wnames);
v9fs_rlerror(req, &err);
g_assert_cmpint(err, ==, ENOENT);
g_free(wnames[0]);
}
static void fs_walk_dotdot(QVirtIO9P *v9p)
{
char *const wnames[] = { g_strdup("..") };
v9fs_qid root_qid, *wqid;
P9Req *req;
fs_version(v9p);
req = v9fs_tattach(v9p, 0, getuid());
v9fs_rattach(req, &root_qid);
req = v9fs_twalk(v9p, 0, 1, 1, wnames);
v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
g_free(wqid);
g_free(wnames[0]);
}
typedef void (*v9fs_test_fn)(QVirtIO9P *v9p);
static void v9fs_run_pci_test(gconstpointer data)
{
v9fs_test_fn fn = data;
QVirtIO9P *v9p = qvirtio_9p_pci_start();
if (fn) {
fn(v9p);
}
qvirtio_9p_pci_stop(v9p);
}
static void v9fs_qtest_pci_add(const char *path, v9fs_test_fn fn)
{
qtest_add_data_func(path, fn, v9fs_run_pci_test);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
v9fs_qtest_pci_add("/virtio/9p/pci/nop", NULL);
v9fs_qtest_pci_add("/virtio/9p/pci/config", pci_config);
v9fs_qtest_pci_add("/virtio/9p/pci/fs/version/basic", fs_version);
v9fs_qtest_pci_add("/virtio/9p/pci/fs/attach/basic", fs_attach);
v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/basic", fs_walk);
v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/no_slash", fs_walk_no_slash);
v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/dotdot_from_root",
fs_walk_dotdot);
return g_test_run();
}
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