This test case uses a Tlink request to create a hard link to a regular file using the 9pfs 'local' fs driver.
Signed-off-by: Christian Schoenebeck <qemu_...@crudebyte.com> --- tests/qtest/virtio-9p-test.c | 61 ++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/tests/qtest/virtio-9p-test.c b/tests/qtest/virtio-9p-test.c index f7d18f6274..447d8e3344 100644 --- a/tests/qtest/virtio-9p-test.c +++ b/tests/qtest/virtio-9p-test.c @@ -260,6 +260,7 @@ static const char *rmessage_name(uint8_t id) id == P9_RMKDIR ? "RMKDIR" : id == P9_RLCREATE ? "RLCREATE" : id == P9_RSYMLINK ? "RSYMLINK" : + id == P9_RLINK ? "RLINK" : id == P9_RUNLINKAT ? "RUNLINKAT" : id == P9_RFLUSH ? "RFLUSH" : id == P9_RREADDIR ? "READDIR" : @@ -742,6 +743,33 @@ static void v9fs_rsymlink(P9Req *req, v9fs_qid *qid) v9fs_req_free(req); } +/* size[4] Tlink tag[2] dfid[4] fid[4] name[s] */ +static P9Req *v9fs_tlink(QVirtio9P *v9p, uint32_t dfid, uint32_t fid, + const char *name, uint16_t tag) +{ + P9Req *req; + + uint32_t body_size = 4 + 4; + uint16_t string_size = v9fs_string_size(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); + v9fs_req_send(req); + return req; +} + +/* size[4] Rlink tag[2] */ +static void v9fs_rlink(P9Req *req) +{ + v9fs_req_recv(req, P9_RLINK); + v9fs_req_free(req); +} + /* size[4] Tunlinkat tag[2] dirfd[4] name[s] flags[4] */ static P9Req *v9fs_tunlinkat(QVirtio9P *v9p, uint32_t dirfd, const char *name, uint32_t flags, uint16_t tag) @@ -1318,6 +1346,38 @@ static void fs_unlinkat_symlink(void *obj, void *data, g_free(real_file); } +static void fs_hardlink_file(void *obj, void *data, QGuestAllocator *t_alloc) +{ + QVirtio9P *v9p = obj; + P9Req *req; + uint32_t dfid, fid; + struct stat st_real, st_link; + char *real_file = virtio_9p_test_path("07/real_file"); + char *hardlink_file = virtio_9p_test_path("07/hardlink_file"); + + fs_attach(v9p, NULL, t_alloc); + fs_mkdir(v9p, data, t_alloc, "/", "07"); + fid = fs_lcreate(v9p, data, t_alloc, "07", "real_file"); + g_assert(stat(real_file, &st_real) == 0); + g_assert((st_real.st_mode & S_IFMT) == S_IFREG); + + dfid = fs_walk_fid(v9p, data, t_alloc, "07"); + + req = v9fs_tlink(v9p, dfid, fid, "hardlink_file", 0); + v9fs_req_wait_for_reply(req, NULL); + v9fs_rlink(req); + + /* check if link exists now ... */ + g_assert(stat(hardlink_file, &st_link) == 0); + /* ... and it's a hard link, right? */ + g_assert((st_link.st_mode & S_IFMT) == S_IFREG); + g_assert(st_link.st_dev == st_real.st_dev); + g_assert(st_link.st_ino == st_real.st_ino); + + g_free(hardlink_file); + g_free(real_file); +} + static void *assign_9p_local_driver(GString *cmd_line, void *arg) { virtio_9p_assign_local_driver(cmd_line, "security_model=mapped-xattr"); @@ -1363,6 +1423,7 @@ static void register_virtio_9p_test(void) qos_add_test("local/unlinkat_file", "virtio-9p", fs_unlinkat_file, &opts); qos_add_test("local/symlink_file", "virtio-9p", fs_symlink_file, &opts); qos_add_test("local/unlinkat_symlink", "virtio-9p", fs_unlinkat_symlink, &opts); + qos_add_test("local/hardlink_file", "virtio-9p", fs_hardlink_file, &opts); } libqos_init(register_virtio_9p_test); -- 2.20.1