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Mon, 6 Jan 2020 18:22:55 +0100 (CET) Received: from kaod.org (lns-bzn-46-82-253-208-248.adsl.proxad.net [82.253.208.248]) (Authenticated sender: groug@kaod.org) by player779.ha.ovh.net (Postfix) with ESMTPSA id 866E6DE03DA5; Mon, 6 Jan 2020 17:22:53 +0000 (UTC) Date: Mon, 6 Jan 2020 18:22:52 +0100 From: Greg Kurz To: Christian Schoenebeck Subject: Re: [PATCH v2 4/9] tests/virtio-9p: added readdir test Message-ID: <20200106182252.58dd6712@bahia.lan> In-Reply-To: References: X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Ovh-Tracer-Id: 7849211201066735936 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedufedrvdehtddguddtudcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhepfffhvffukfgjfhfogggtgfesthejredtredtvdenucfhrhhomhepifhrvghgucfmuhhriicuoehgrhhouhhgsehkrghougdrohhrgheqnecukfhppedtrddtrddtrddtpdekvddrvdehfedrvddtkedrvdegkeenucfrrghrrghmpehmohguvgepshhmthhpqdhouhhtpdhhvghlohepphhlrgihvghrjeejledrhhgrrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpehgrhhouhhgsehkrghougdrohhrghdprhgtphhtthhopehqvghmuhdquggvvhgvlhesnhhonhhgnhhurdhorhhgnecuvehluhhsthgvrhfuihiivgeptd X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 178.33.111.220 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, 18 Dec 2019 14:30:43 +0100 Christian Schoenebeck wrote: > This first readdir test simply checks the amount of directory > entries returned by 9pfs server, according to the created amount > of virtual files on 9pfs synth driver side. > > Signed-off-by: Christian Schoenebeck > --- > tests/virtio-9p-test.c | 124 +++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 124 insertions(+) > > diff --git a/tests/virtio-9p-test.c b/tests/virtio-9p-test.c > index 06263edb53..48c0eca292 100644 > --- a/tests/virtio-9p-test.c > +++ b/tests/virtio-9p-test.c > @@ -68,6 +68,11 @@ static void v9fs_memread(P9Req *req, void *addr, size_t len) > req->r_off += len; > } > > +static void v9fs_uint8_read(P9Req *req, uint8_t *val) > +{ > + v9fs_memread(req, val, 1); > +} > + > static void v9fs_uint16_write(P9Req *req, uint16_t val) > { > uint16_t le_val = cpu_to_le16(val); > @@ -101,6 +106,12 @@ static void v9fs_uint32_read(P9Req *req, uint32_t *val) > le32_to_cpus(val); > } > > +static void v9fs_uint64_read(P9Req *req, uint64_t *val) > +{ > + v9fs_memread(req, val, 8); > + le64_to_cpus(val); > +} > + > /* len[2] string[len] */ > static uint16_t v9fs_string_size(const char *string) > { > @@ -191,6 +202,7 @@ static const char *rmessage_name(uint8_t id) > id == P9_RLOPEN ? "RLOPEN" : > id == P9_RWRITE ? "RWRITE" : > id == P9_RFLUSH ? "RFLUSH" : > + id == P9_RREADDIR ? "READDIR" : > ""; > } > > @@ -348,6 +360,79 @@ static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid) > v9fs_req_free(req); > } > > +/* size[4] Treaddir tag[2] fid[4] offset[8] count[4] */ > +static P9Req *v9fs_treaddir(QVirtio9P *v9p, uint32_t fid, uint64_t offset, > + uint32_t count, uint16_t tag) > +{ > + P9Req *req; > + > + req = v9fs_req_init(v9p, 4 + 8 + 4, P9_TREADDIR, tag); > + v9fs_uint32_write(req, fid); > + v9fs_uint64_write(req, offset); > + v9fs_uint32_write(req, count); > + v9fs_req_send(req); > + return req; > +} > + > +struct v9fs_dirent { The QEMU coding style calls for a CamelCase typedef, ie. typedef struct V9fsDirent V9fsDirent; > + v9fs_qid qid; Yeah... I should have done the same when I introduced this type ;-) > + uint64_t offset; > + uint8_t type; > + char *name; > + struct v9fs_dirent *next; > +}; > + > +/* size[4] Rreaddir tag[2] count[4] data[count] */ > +static void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries, > + struct v9fs_dirent **entries) > +{ > + uint32_t sz; > + struct v9fs_dirent *e = NULL; > + uint16_t slen; > + uint32_t n = 0; > + > + v9fs_req_recv(req, P9_RREADDIR); > + v9fs_uint32_read(req, &sz); > + > + if (count) { > + *count = sz; > + } > + > + for (int32_t togo = (int32_t)sz; > + togo >= 13 + 8 + 1 + 2; > + togo -= 13 + 8 + 1 + 2 + slen, ++n) > + { > + if (!e) { > + e = g_malloc(sizeof(struct v9fs_dirent)); > + if (entries) > + *entries = e; > + } else { > + e = e->next = g_malloc(sizeof(struct v9fs_dirent)); > + } > + e->next = NULL; > + /* qid[13] offset[8] type[1] name[s] */ > + v9fs_memread(req, &e->qid, 13); > + v9fs_uint64_read(req, &e->offset); > + v9fs_uint8_read(req, &e->type); > + v9fs_string_read(req, &slen, &e->name); > + } > + > + if (nentries) { > + *nentries = n; > + } > +} > + > +static void v9fs_free_dirents(struct v9fs_dirent *e) > +{ > + struct v9fs_dirent *next = NULL; > + > + for (; e; e = next) { > + next = e->next; > + g_free(e->name); > + g_free(e); > + } > +} > + > /* size[4] Tlopen tag[2] fid[4] flags[4] */ > static P9Req *v9fs_tlopen(QVirtio9P *v9p, uint32_t fid, uint32_t flags, > uint16_t tag) > @@ -480,6 +565,44 @@ static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc) > g_free(wqid); > } > > +static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc) > +{ > + QVirtio9P *v9p = obj; > + alloc = t_alloc; > + char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) }; > + uint16_t nqid; > + v9fs_qid qid; > + uint32_t count, nentries; > + struct v9fs_dirent *entries = NULL; > + P9Req *req; > + > + fs_attach(v9p, NULL, t_alloc); > + req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0); > + v9fs_req_wait_for_reply(req, NULL); > + v9fs_rwalk(req, &nqid, NULL); > + g_assert_cmpint(nqid, ==, 1); > + > + req = v9fs_tlopen(v9p, 1, O_DIRECTORY, 0); > + v9fs_req_wait_for_reply(req, NULL); > + v9fs_rlopen(req, &qid, NULL); > + > + req = v9fs_treaddir(v9p, 1, 0, P9_MAX_SIZE - P9_IOHDRSZ, 0); > + v9fs_req_wait_for_reply(req, NULL); > + v9fs_rreaddir(req, &count, &nentries, &entries); > + > + /* > + * Assuming msize (P9_MAX_SIZE) is large enough so we can retrieve all > + * dir entries with only one readdir request. > + */ > + g_assert_cmpint( > + nentries, ==, > + QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */ > + ); What about coming up with a version of this test that loops until it could read all the entries instead of this assumption ? > + > + v9fs_free_dirents(entries); > + g_free(wnames[0]); > +} > + > static void fs_walk_no_slash(void *obj, void *data, QGuestAllocator *t_alloc) > { > QVirtio9P *v9p = obj; > @@ -658,6 +781,7 @@ static void register_virtio_9p_test(void) > NULL); > qos_add_test("fs/flush/ignored", "virtio-9p", fs_flush_ignored, > NULL); > + qos_add_test("fs/readdir/basic", "virtio-9p", fs_readdir, NULL); > } > > libqos_init(register_virtio_9p_test);