tidy config

2 files changed, 54 insertions, 2 deletions

diff --git a/cmd/srv9p/config/config.h b/cmd/srv9p/config/config.h
index 2edbd7b..ead97e0 120000..100644
--- a/cmd/srv9p/config/config.h
+++ b/cmd/srv9p/config/config.h
@@ -1 +1,46 @@
-../../sbc_harness/config/config.h
\ No newline at end of file
+/* config.h - Compile-time configuration for srv9p
+ *
+ * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * SPDX-Licence-Identifier: AGPL-3.0-or-later
+ */
+
+#define CONFIG_NETIO_NUM_CONNS        8
+
+#  define CONFIG_9P_PORT                564
+/**
+ * This max-msg-size is sized so that a Twrite message can return
+ * 8KiB of data.
+ *
+ * This is the same as the default in Plan 9 4e's lib9p; it has the
+ * comment that "24" is "ample room for Twrite/Rread header
+ * (iounit)".  In fact, the Twrite header is only 23 bytes
+ * ("size[4] Twrite[1] tag[2] fid[4] offset[8] count[4]") and the
+ * Rread header is even shorter at 11 bytes ("size[4] Rread[1]
+ * tag[2] count[4]"), so "24" appears to be the size of the Twrite
+ * header rounded up to a nice round number.
+ *
+ * In older versions of 9P ("9P1"), the max message size was
+ * defined as part of the protocol specification rather than
+ * negotiated.  In Plan 9 1e it was (8*1024)+128, and was bumped to
+ * (8*1024)+160 in 2e and 3e.
+ */
+#define CONFIG_9P_MAX_MSG_SIZE        ((4*1024)+24)
+/**
+ * Maximum host-data-structure size.  A message may be larger in
+ * unmarshaled-host-structures than marshaled-net-bytes due to (1)
+ * struct padding, (2) nul-terminator byes for strings.
+ */
+#define CONFIG_9P_MAX_HOSTMSG_SIZE    CONFIG_9P_MAX_MSG_SIZE+16
+#define CONFIG_9P_MAX_FIDS            16
+#define CONFIG_9P_MAX_REQS            2
+#define CONFIG_9P_MAX_ERR_SIZE        128 /* 128 is what Plan 9 4e uses */
+
+#define CONFIG_COROUTINE_DEFAULT_STACK_SIZE    (32*1024)
+#define CONFIG_COROUTINE_MEASURE_STACK         1 /* bool */
+#define CONFIG_COROUTINE_PROTECT_STACK         1 /* bool */
+#define CONFIG_COROUTINE_DEBUG                 0 /* bool */
+#define CONFIG_COROUTINE_VALGRIND              1 /* bool */
+#define CONFIG_COROUTINE_NUM                   (1                          /* usb_common   */ +\
+                                                1                          /* usb_keyboard */ +\
+                                                CONFIG_NETIO_NUM_CONNS     /* accept+read  */ +\
+                                                (CONFIG_9P_MAX_REQS*CONFIG_NETIO_NUM_CONNS) /* work+write   */ )
diff --git a/cmd/srv9p/main.c b/cmd/srv9p/main.c
index f62617d..6ed4b79 100644
--- a/cmd/srv9p/main.c
+++ b/cmd/srv9p/main.c
@@ -7,9 +7,16 @@
 
 #include "static.h"
 
-#define USE_CONFIG_COROUTINE
+/* configuration **************************************************************/
+
 #include "config.h"
 
+#ifndef CONFIG_NETIO_NUM_CONNS
+#	error config.h must define CONFIG_NETIO_NUM_CONNS
+#endif
+
+/* implementation *************************************************************/
+
 #define UNUSED(name) /* name __attribute__((unused)) */
 
 static struct static_dir_data root = {