1 files changed, 4 insertions, 10 deletions
diff --git a/lib9p/idl/2002-9P2000.9p b/lib9p/idl/2002-9P2000.9p
index 14253f7..438e02f 100644
--- a/lib9p/idl/2002-9P2000.9p
+++ b/lib9p/idl/2002-9P2000.9p
@@ -28,12 +28,6 @@ num tag = 2
 num fid = 4
     "NOFID = ~0"
 
-# data - u32le `n`, then `n` bytes of data
-struct d = "len[4] len*(dat[1])"
-
-# data - s32le `n`, then `n` bytes of data
-struct d_signed = "len[4,max=s32_max] len*(dat[1])"
-
 # string - u16le `n`, then `n` bytes of UTF-8, without any nul-bytes
 struct s = "len[2] len*(utf8[1])"
 
@@ -153,10 +147,10 @@ msg Topen    = "size[4,val=end-&size] typ[1,val=112] tag[tag] fid[fid] mode[o]"
 msg Ropen    = "size[4,val=end-&size] typ[1,val=113] tag[tag] qid[qid] iounit[4]"
 msg Tcreate  = "size[4,val=end-&size] typ[1,val=114] tag[tag] fid[fid] name[s] perm[dm] mode[o]"
 msg Rcreate  = "size[4,val=end-&size] typ[1,val=115] tag[tag] qid[qid] iounit[4]"
-msg Tread    = "size[4,val=end-&size] typ[1,val=116] tag[tag] fid[fid] offset[8,max=s64_max] count[4,max=s32_max]"
-msg Rread    = "size[4,val=end-&size] typ[1,val=117] tag[tag] data[d_signed]" # For directories `data` is the sequence "cnt*(entries[stat])".
-msg Twrite   = "size[4,val=end-&size] typ[1,val=118] tag[tag] fid[fid] offset[8,max=s64_max] data[d_signed]"
-msg Rwrite   = "size[4,val=end-&size] typ[1,val=119] tag[tag] count[4]"
+msg Tread    = "size[4,val=end-&size] typ[1,val=116] tag[tag] fid[fid] offset[8,max=s64_max] count[4,max=s32_max]" # See 4e `sys/src/lib9p/srv.c:sread()` for `offset:max` and `count:max`.
+msg Rread    = "size[4,val=end-&size] typ[1,val=117] tag[tag] count[4,max=s32_max] count*(data[1])" # `max` is inherited from Tread, for directories `data` is the sequence "cnt*(entries[stat])".
+msg Twrite   = "size[4,val=end-&size] typ[1,val=118] tag[tag] fid[fid] offset[8,max=s64_max] count[4,max=s32_max] count*(data[1])" # See 4e `sys/src/lib9p/srv.c:swrite()` for `offset:max` and `count:max`.
+msg Rwrite   = "size[4,val=end-&size] typ[1,val=119] tag[tag] count[4,max=s32_max]" # `max` is inherited from Twrite.
 msg Tclunk   = "size[4,val=end-&size] typ[1,val=120] tag[tag] fid[fid]"
 msg Rclunk   = "size[4,val=end-&size] typ[1,val=121] tag[tag]"
 msg Tremove  = "size[4,val=end-&size] typ[1,val=122] tag[tag] fid[fid]"