tests/9p: merge v9fs_tlink() and do_hardlink()

As with previous patches, unify those 2 functions into a single function
v9fs_tlink() by using a declarative function arguments approach.

Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <cb4d42203e1e4e6027df4924bbe4bdbc002f668b.1664917004.git.qemu_oss@crudebyte.com>

2 files changed, 64 insertions, 10 deletions

diff --git a/tests/qtest/libqos/virtio-9p-client.c b/tests/qtest/libqos/virtio-9p-client.c
index 89eaf50355..a2770719b9 100644
--- a/tests/qtest/libqos/virtio-9p-client.c
+++ b/tests/qtest/libqos/virtio-9p-client.c
@@ -950,23 +950,50 @@ void v9fs_rsymlink(P9Req *req, v9fs_qid *qid)
 }
 
 /* size[4] Tlink tag[2] dfid[4] fid[4] name[s] */
-P9Req *v9fs_tlink(QVirtio9P *v9p, uint32_t dfid, uint32_t fid,
-                  const char *name, uint16_t tag)
+TlinkRes v9fs_tlink(TlinkOpt opt)
 {
     P9Req *req;
+    uint32_t err;
+
+    g_assert(opt.client);
+    /* expecting either hi-level atPath or low-level dfid, but not both */
+    g_assert(!opt.atPath || !opt.dfid);
+    /* expecting either hi-level toPath or low-level fid, but not both */
+    g_assert(!opt.toPath || !opt.fid);
+
+    if (opt.atPath) {
+        opt.dfid = v9fs_twalk((TWalkOpt) { .client = opt.client,
+                                           .path = opt.atPath }).newfid;
+    }
+    if (opt.toPath) {
+        opt.fid = v9fs_twalk((TWalkOpt) { .client = opt.client,
+                                          .path = opt.toPath }).newfid;
+    }
 
     uint32_t body_size = 4 + 4;
-    uint16_t string_size = v9fs_string_size(name);
+    uint16_t string_size = v9fs_string_size(opt.name);
 
     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
     body_size += string_size;
 
-    req = v9fs_req_init(v9p, body_size, P9_TLINK, tag);
-    v9fs_uint32_write(req, dfid);
-    v9fs_uint32_write(req, fid);
-    v9fs_string_write(req, name);
+    req = v9fs_req_init(opt.client, body_size, P9_TLINK, opt.tag);
+    v9fs_uint32_write(req, opt.dfid);
+    v9fs_uint32_write(req, opt.fid);
+    v9fs_string_write(req, opt.name);
     v9fs_req_send(req);
-    return req;
+
+    if (!opt.requestOnly) {
+        v9fs_req_wait_for_reply(req, NULL);
+        if (opt.expectErr) {
+            v9fs_rlerror(req, &err);
+            g_assert_cmpint(err, ==, opt.expectErr);
+        } else {
+            v9fs_rlink(req);
+        }
+        req = NULL; /* request was freed */
+    }
+
+    return (TlinkRes) { .req = req };
 }
 
 /* size[4] Rlink tag[2] */
diff --git a/tests/qtest/libqos/virtio-9p-client.h b/tests/qtest/libqos/virtio-9p-client.h
index b905a54966..49ffd0fc51 100644
--- a/tests/qtest/libqos/virtio-9p-client.h
+++ b/tests/qtest/libqos/virtio-9p-client.h
@@ -387,6 +387,34 @@ typedef struct TsymlinkRes {
     P9Req *req;
 } TsymlinkRes;
 
+/* options for 'Tlink' 9p request */
+typedef struct TlinkOpt {
+    /* 9P client being used (mandatory) */
+    QVirtio9P *client;
+    /* user supplied tag number being returned with response (optional) */
+    uint16_t tag;
+    /* low-level variant of directory where hard link shall be created */
+    uint32_t dfid;
+    /* high-level variant of directory where hard link shall be created */
+    const char *atPath;
+    /* low-level variant of target referenced by new hard link */
+    uint32_t fid;
+    /* high-level variant of target referenced by new hard link */
+    const char *toPath;
+    /* name of hard link (required) */
+    const char *name;
+    /* only send Tlink request but not wait for a reply? (optional) */
+    bool requestOnly;
+    /* do we expect an Rlerror response, if yes which error code? (optional) */
+    uint32_t expectErr;
+} TlinkOpt;
+
+/* result of 'Tlink' 9p request */
+typedef struct TlinkRes {
+    /* if requestOnly was set: request object for further processing */
+    P9Req *req;
+} TlinkRes;
+
 void v9fs_set_allocator(QGuestAllocator *t_alloc);
 void v9fs_memwrite(P9Req *req, const void *addr, size_t len);
 void v9fs_memskip(P9Req *req, size_t len);
@@ -432,8 +460,7 @@ TlcreateRes v9fs_tlcreate(TlcreateOpt);
 void v9fs_rlcreate(P9Req *req, v9fs_qid *qid, uint32_t *iounit);
 TsymlinkRes v9fs_tsymlink(TsymlinkOpt);
 void v9fs_rsymlink(P9Req *req, v9fs_qid *qid);
-P9Req *v9fs_tlink(QVirtio9P *v9p, uint32_t dfid, uint32_t fid,
-                  const char *name, uint16_t tag);
+TlinkRes v9fs_tlink(TlinkOpt);
 void v9fs_rlink(P9Req *req);
 P9Req *v9fs_tunlinkat(QVirtio9P *v9p, uint32_t dirfd, const char *name,
                       uint32_t flags, uint16_t tag);