Merge branch 'lukeshu/9p-versions'

7 files changed, 87 insertions, 11 deletions

diff --git a/lib9p/9p.generated.c b/lib9p/9p.generated.c
index 284a0a6..914a612 100644
--- a/lib9p/9p.generated.c
+++ b/lib9p/9p.generated.c
@@ -37,7 +37,11 @@ LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Tauth, lib9p_msg_Tauth, stat
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Rauth, lib9p_msg_Rauth, static);
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Tattach, lib9p_msg_Tattach, static);
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Rattach, lib9p_msg_Rattach, static);
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Rerror, lib9p_msg_Rerror, static);
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Tflush, lib9p_msg_Tflush, static);
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Rflush, lib9p_msg_Rflush, static);
 LO_IMPLEMENTATION_C(fmt_formatter, struct lib9p_msg_Twalk, lib9p_msg_Twalk, static);
@@ -507,6 +511,8 @@ static ssize_t validate_Rattach(struct lib9p_ctx *ctx, uint32_t net_size, uint8_
 	return (ssize_t)host_size;
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static ssize_t validate_Rerror(struct lib9p_ctx *ctx, uint32_t net_size, uint8_t *net_bytes) {
 	uint32_t net_offset = 0;
 	ssize_t host_size = sizeof(struct lib9p_msg_Rerror);
@@ -529,6 +535,8 @@ static ssize_t validate_Rerror(struct lib9p_ctx *ctx, uint32_t net_size, uint8_t
 	return (ssize_t)host_size;
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static ssize_t validate_Tflush(struct lib9p_ctx *ctx, uint32_t net_size, uint8_t *net_bytes) {
 	uint32_t net_offset = 0;
 	ssize_t host_size = sizeof(struct lib9p_msg_Tflush);
@@ -2012,6 +2020,8 @@ static void unmarshal_Rattach([[gnu::unused]] struct lib9p_ctx *ctx, uint8_t *ne
 	UNMARSHAL_U64LE(ctx, out->qid.path);
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static void unmarshal_Rerror([[gnu::unused]] struct lib9p_ctx *ctx, uint8_t *net_bytes, void *out_buf) {
 	struct lib9p_msg_Rerror *out = out_buf;
 	[[gnu::unused]] void *extra = &out[1];
@@ -2028,6 +2038,8 @@ static void unmarshal_Rerror([[gnu::unused]] struct lib9p_ctx *ctx, uint8_t *net
 #endif /* CONFIG_9P_ENABLE_9P2000_u */
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static void unmarshal_Tflush([[gnu::unused]] struct lib9p_ctx *ctx, uint8_t *net_bytes, void *out_buf) {
 	struct lib9p_msg_Tflush *out = out_buf;
 	[[gnu::unused]] void *extra = &out[1];
@@ -3153,6 +3165,8 @@ static bool marshal_Rattach(struct lib9p_ctx *ctx, struct lib9p_msg_Rattach *val
 	return false;
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static bool marshal_Rerror(struct lib9p_ctx *ctx, struct lib9p_msg_Rerror *val, struct _marshal_ret *ret) {
 	uint32_t needed_size = 9 + val->errstr.len;
 #if CONFIG_9P_ENABLE_9P2000_u
@@ -3182,6 +3196,8 @@ static bool marshal_Rerror(struct lib9p_ctx *ctx, struct lib9p_msg_Rerror *val,
 	return false;
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static bool marshal_Tflush(struct lib9p_ctx *ctx, struct lib9p_msg_Tflush *val, struct _marshal_ret *ret) {
 	uint32_t needed_size = 9;
 	if (needed_size > ctx->max_msg_size) {
@@ -5136,6 +5152,8 @@ static void lib9p_msg_Rattach_format(struct lib9p_msg_Rattach *self, struct fmt_
 	fmt_state_puts(state, " }");
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static void lib9p_msg_Rerror_format(struct lib9p_msg_Rerror *self, struct fmt_state *state) {
 	fmt_state_puts(state, "Rerror {");
 	fmt_state_puts(state, " tag=");
@@ -5149,6 +5167,8 @@ static void lib9p_msg_Rerror_format(struct lib9p_msg_Rerror *self, struct fmt_st
 	fmt_state_puts(state, " }");
 }
 
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 static void lib9p_msg_Tflush_format(struct lib9p_msg_Tflush *self, struct fmt_state *state) {
 	fmt_state_puts(state, "Tflush {");
 	fmt_state_puts(state, " tag=");
@@ -7399,7 +7419,7 @@ const struct _lib9p_ver_tentry _lib9p_table_ver[LIB9P_VER_NUM] = {
 	[LIB9P_VER_9P2000] = {.name="9P2000", .min_msg_size=9},
 #endif /* CONFIG_9P_ENABLE_9P2000 */
 #if CONFIG_9P_ENABLE_9P2000_L
-	[LIB9P_VER_9P2000_L] = {.name="9P2000.L", .min_msg_size=9},
+	[LIB9P_VER_9P2000_L] = {.name="9P2000.L", .min_msg_size=11},
 #endif /* CONFIG_9P_ENABLE_9P2000_L */
 #if CONFIG_9P_ENABLE_9P2000_e
 	[LIB9P_VER_9P2000_e] = {.name="9P2000.e", .min_msg_size=9},
@@ -7500,7 +7520,6 @@ const struct _lib9p_msg_tentry _lib9p_table_msg[LIB9P_VER_NUM][0x100] = {
 		_MSG(Rauth),
 		_MSG(Tattach),
 		_MSG(Rattach),
-		_MSG(Rerror),
 		_MSG(Tflush),
 		_MSG(Rflush),
 		_MSG(Twalk),
@@ -7784,7 +7803,6 @@ const struct _lib9p_recv_tentry _lib9p_table_Rmsg_recv[LIB9P_VER_NUM][0x80] = {
 		_MSG_RECV(Rversion),
 		_MSG_RECV(Rauth),
 		_MSG_RECV(Rattach),
-		_MSG_RECV(Rerror),
 		_MSG_RECV(Rflush),
 		_MSG_RECV(Rwalk),
 		_MSG_RECV(Rread),
@@ -8011,7 +8029,6 @@ const struct _lib9p_send_tentry _lib9p_table_Rmsg_send[LIB9P_VER_NUM][0x80] = {
 		_MSG_SEND(Rversion),
 		_MSG_SEND(Rauth),
 		_MSG_SEND(Rattach),
-		_MSG_SEND(Rerror),
 		_MSG_SEND(Rflush),
 		_MSG_SEND(Rwalk),
 		_MSG_SEND(Rread),
diff --git a/lib9p/idl/2003-9P2000.p9p.9p b/lib9p/idl/2003-9P2000.p9p.9p
index 3f6a524..1d1c307 100644
--- a/lib9p/idl/2003-9P2000.p9p.9p
+++ b/lib9p/idl/2003-9P2000.p9p.9p
@@ -27,7 +27,7 @@ from ./2002-9P2000.9p import *
 # e.g. you replace syscall:`open()` with lib9pclient:`fsopen()`).
 #
 # "Unfortunately", programs in plan9port must deal both with 9P files
-# and native "Unix" files; and need to turn an 9P FID into a native
+# and native "Unix" files; and need to turn a 9P FID into a native
 # file descriptor.  To do this, the `9pserve` program and lib9pclient
 # add an extension call to 9P2000: Topenfd/Ropenfd/fsopenfd().
 #
diff --git a/lib9p/idl/2010-9P2000.L.9p b/lib9p/idl/2010-9P2000.L.9p
index 652660c..b88b537 100644
--- a/lib9p/idl/2010-9P2000.L.9p
+++ b/lib9p/idl/2010-9P2000.L.9p
@@ -8,11 +8,12 @@
 # https://github.com/chaos/diod/blob/master/src/libnpfs/protocol.h
 version "9P2000.L"
 
+# low-level types ##############################################################
+
 from ./2002-9P2000.9p import tag, fid, s, qt, qid
-from ./2002-9P2000.9p import Rerror
-from ./2002-9P2000.9p import Tversion, Rversion, Tflush, Rflush, Twalk, Rwalk, Tread, Rread, Twrite, Rwrite, Tclunk, Rclunk, Tremove, Rremove
-from ./2005-9P2000.u.9p import nuid, errno, Tauth, Rauth, Tattach, Rattach
+from ./2005-9P2000.u.9p import nuid, errno
 
+# https://github.com/chaos/diod/issues/35
 #num errno += # TODO
 
 num super_magic = 4
@@ -168,6 +169,21 @@ num lock_status = 1
 	"ERROR=2"
 	"GRACE=3"
 
+# 9P2000 Operations (.L subset) ################################################
+
+from ./2002-9P2000.9p import Tversion, Rversion
+from ./2002-9P2000.9p import Tflush, Rflush
+from ./2002-9P2000.9p import Twalk, Rwalk
+from ./2002-9P2000.9p import Tread, Rread, Twrite, Rwrite
+from ./2002-9P2000.9p import Tclunk, Rclunk
+from ./2002-9P2000.9p import Tremove, Rremove
+
+# 9P2000.u Operations (.L subset) ##############################################
+
+from ./2005-9P2000.u.9p import Tattach, Rattach, Tauth, Rauth
+
+# 9P2000.L Operations ##########################################################
+
 #msg Tlerror      = "size[4,val=end-&size] typ[1,val=6]  tag[tag] illegal" # analogous to 106/Terror
 msg Rlerror      = "size[4,val=end-&size] typ[1,val=7]  tag[tag] errnum[errno]" # analogous to 107/Rerror
 msg Tstatfs      = "size[4,val=end-&size] typ[1,val=8]  tag[tag] fid[fid]"
diff --git a/lib9p/include/lib9p/9p.generated.h b/lib9p/include/lib9p/9p.generated.h
index a53f117..49b4818 100644
--- a/lib9p/include/lib9p/9p.generated.h
+++ b/lib9p/include/lib9p/9p.generated.h
@@ -118,7 +118,11 @@ enum lib9p_msg_type { /* uint8_t */
 	LIB9P_TYP_Rauth        = 103,
 	LIB9P_TYP_Tattach      = 104,
 	LIB9P_TYP_Rattach      = 105,
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 	LIB9P_TYP_Rerror       = 107,
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 	LIB9P_TYP_Tflush       = 108,
 	LIB9P_TYP_Rflush       = 109,
 	LIB9P_TYP_Twalk        = 110,
@@ -967,9 +971,8 @@ struct lib9p_msg_Topenfd {
 LO_IMPLEMENTATION_H(fmt_formatter, struct lib9p_msg_Topenfd, lib9p_msg_Topenfd);
 
 #endif /* CONFIG_9P_ENABLE_9P2000_p9p */
-#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
+#if CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u
 /* LIB9P_VER_9P2000    : min_size = 9 ; exp_size = 36 ; max_size = 65,544 ; max_iov = 2 ; max_copy = 9 */
-/* LIB9P_VER_9P2000_L  : min_size = 9 ; exp_size = 36 ; max_size = 65,544 ; max_iov = 2 ; max_copy = 9 */
 /* LIB9P_VER_9P2000_e  : min_size = 9 ; exp_size = 36 ; max_size = 65,544 ; max_iov = 2 ; max_copy = 9 */
 /* LIB9P_VER_9P2000_p9p: min_size = 9 ; exp_size = 36 ; max_size = 65,544 ; max_iov = 2 ; max_copy = 9 */
 /* LIB9P_VER_9P2000_u  : min_size = 13 ; exp_size = 40 ; max_size = 65,548 ; max_iov = 3 ; max_copy = 13 */
@@ -982,7 +985,7 @@ struct lib9p_msg_Rerror {
 };
 LO_IMPLEMENTATION_H(fmt_formatter, struct lib9p_msg_Rerror, lib9p_msg_Rerror);
 
-#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_L || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
+#endif /* CONFIG_9P_ENABLE_9P2000 || CONFIG_9P_ENABLE_9P2000_e || CONFIG_9P_ENABLE_9P2000_p9p || CONFIG_9P_ENABLE_9P2000_u */
 #if CONFIG_9P_ENABLE_9P2000_L
 /* size = 11 ; max_iov = 1 ; max_copy = 11 */
 struct lib9p_msg_Rlerror {
diff --git a/lib9p/include/lib9p/srv.h b/lib9p/include/lib9p/srv.h
index 7109179..bb5efb9 100644
--- a/lib9p/include/lib9p/srv.h
+++ b/lib9p/include/lib9p/srv.h
@@ -145,11 +145,22 @@ LO_INTERFACE(lib9p_srv_dio);
 
 CR_RPC_DECLARE(_lib9p_srv_reqch, struct lib9p_srv_ctx *, bool);
 
+#if CONFIG_9P_ENABLE_9P2000_p9p
+#define net_stream_conn_unix_LO_IFACE \
+	LO_NEST(net_stream_conn) \
+	/** Returns 0 on success, -errno on error. */ \
+	LO_FUNC(int, send_unix_fd, int fd)
+LO_INTERFACE(net_stream_conn_unix);
+#endif
+
 struct lib9p_srv {
 	/* Things you provide */
 	void /*TODO*/               (*auth   )(struct lib9p_srv_ctx *, struct lib9p_s treename); /* optional */
 	lo_interface lib9p_srv_file (*rootdir)(struct lib9p_srv_ctx *, struct lib9p_s treename);
 	void                        (*msglog )(struct lib9p_srv_ctx *, enum lib9p_msg_type, void *hostmsg); /* optional */
+#if CONFIG_9P_ENABLE_9P2000_p9p
+	lo_interface net_stream_conn_unix (*type_assert_unix)(lo_interface net_stream_conn); /* optional */
+#endif
 
 	/* For internal use */
 	BEGIN_PRIVATE(LIB9P_SRV_H);
diff --git a/lib9p/protogen/c.py b/lib9p/protogen/c.py
index 363f0df..530bdb6 100644
--- a/lib9p/protogen/c.py
+++ b/lib9p/protogen/c.py
@@ -132,6 +132,9 @@ def gen_c(versions: set[str], typs: list[idl.UserType]) -> str:
         else:
             ret += cutil.ifdef_push(1, c9util.ver_ifdef({ver}))
             min_msg_size = rerror.min_size(ver)
+            if ver == "9P2000.L":  # SPECIAL (9P2000.L)
+                rlerror = next(typ for typ in typs if typ.typname == "Rlerror")
+                min_msg_size = rlerror.min_size(ver)
         ret += f'\t[{c9util.ver_enum(ver)}] = {{.name="{ver}", .min_msg_size={min_msg_size}}},\n'
     ret += cutil.ifdef_pop(0)
     ret += "};\n"
diff --git a/lib9p/srv.c b/lib9p/srv.c
index 50e5dae..0a33e03 100644
--- a/lib9p/srv.c
+++ b/lib9p/srv.c
@@ -599,6 +599,9 @@ _HANDLER_PROTO(clunk);
 _HANDLER_PROTO(remove);
 _HANDLER_PROTO(stat);
 _HANDLER_PROTO(wstat);
+#if CONFIG_9P_ENABLE_9P2000_p9p
+_HANDLER_PROTO(openfd);
+#endif
 #if CONFIG_9P_ENABLE_9P2000_e
 _HANDLER_PROTO(session);
 _HANDLER_PROTO(sread);
@@ -621,6 +624,9 @@ static tmessage_handler tmessage_handlers[0x100] = {
 	[LIB9P_TYP_Tremove]  = (tmessage_handler)handle_Tremove,
 	[LIB9P_TYP_Tstat]    = (tmessage_handler)handle_Tstat,
 	[LIB9P_TYP_Twstat]   = (tmessage_handler)handle_Twstat,
+#if CONFIG_9P_ENABLE_9P2000_p9p
+	[LIB9P_TYP_Topenfd]  = (tmessage_handler)handle_Topenfd,
+#endif
 #if CONFIG_9P_ENABLE_9P2000_e
 	[LIB9P_TYP_Tsession] = (tmessage_handler)handle_Tsession,
 	[LIB9P_TYP_Tsread]   = (tmessage_handler)handle_Tsread,
@@ -688,6 +694,11 @@ static void handle_Tversion(struct srv_req *ctx,
 	    '0' <= req->version.utf8[5] && req->version.utf8[5] <= '9' &&
 	    (req->version.len == 6 || req->version.utf8[6] == '.')) {
 		version = LIB9P_VER_9P2000;
+#if CONFIG_9P_ENABLE_9P2000_p9p
+		struct lib9p_srv *srv = ctx->parent_sess->parent_conn->parent_srv;
+		if (srv->type_assert_unix && !LO_IS_NULL(srv->type_assert_unix(ctx->parent_sess->parent_conn->fd)))
+			version = LIB9P_VER_9P2000_p9p;
+#endif
 #if CONFIG_9P_ENABLE_9P2000_u
 		if (lib9p_str_eq(lib9p_str_sliceleft(req->version, 6), lib9p_str(".u")))
 			version = LIB9P_VER_9P2000_u;
@@ -707,6 +718,10 @@ static void handle_Tversion(struct srv_req *ctx,
 	}
 
 	resp->version = lib9p_str((char *)lib9p_version_str(version)); /* cast to discard "const" qualifier */
+#if CONFIG_9P_ENABLE_9P2000_p9p
+	if (version == LIB9P_VER_9P2000_p9p)
+		resp->version = lib9p_str("9P2000");
+#endif
 	resp->max_msg_size = (CONFIG_9P_SRV_MAX_MSG_SIZE < req->max_msg_size)
 		? CONFIG_9P_SRV_MAX_MSG_SIZE
 		: req->max_msg_size;
@@ -1223,6 +1238,17 @@ static void handle_Twstat(struct srv_req *ctx,
 	            LINUX_EOPNOTSUPP, "wstat not (yet?) implemented");
 }
 
+#if CONFIG_9P_ENABLE_9P2000_p9p
+static void handle_Topenfd(struct srv_req *ctx,
+                            struct lib9p_msg_Topenfd *req,
+                            struct lib9p_msg_Ropenfd *resp) {
+	srv_handler_common(ctx, req, resp);
+
+	lib9p_error(&ctx->basectx,
+	            LINUX_EOPNOTSUPP, "openfd not (yet?) implemented");
+}
+#endif
+
 #if CONFIG_9P_ENABLE_9P2000_e
 static void handle_Tsession(struct srv_req *ctx,
                             struct lib9p_msg_Tsession *req,