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tests: virtio-9p: add walk operation test 

The walk operation is used to traverse the directory tree and to associate
paths to fids. A single walk can be used to traverse up to P9_MAXWELEM path
elements at the same time.

The test creates a path with P9_MAXWELEM elements on the backend (à la
'mkdir -p') and issues a walk operation. The walk is expected to succeed
without error.

Reference:

http://man.cat-v.org/plan_9/5/walk

Signed-off-by: Greg Kurz <groug@kaod.org>
This commit is contained in:
Greg Kurz 2017-01-03 17:28:44 +01:00
parent 5c3df1f096
commit 04b88c84a1
1 changed files with 70 additions and 0 deletions
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70
tests/virtio-9p-test.c
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@ -334,6 +334,45 @@ static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
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";
@ -358,6 +397,36 @@ static void fs_attach(QVirtIO9P *v9p)
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);
}
typedef void (*v9fs_test_fn)(QVirtIO9P *v9p);
static void v9fs_run_pci_test(gconstpointer data)
@ -383,6 +452,7 @@ int main(int argc, char **argv)
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);
return g_test_run();
}