1 files changed, 4 insertions, 0 deletions
diff --git a/src/fs.zig b/src/fs.zig
index 753a4446..845e6424 100644
--- a/src/fs.zig
+++ b/src/fs.zig
@@ -1326,6 +1326,10 @@ pub const Namespace = struct {
     /// A 9P write asked a language server something: the answer count it
     /// waits to change (`turn.lsp_answers`), so its failure is the write's.
     lsp_answer_at: ?u64 = null,
+    /// The most a Twrite of the request being served can carry (msize less
+    /// its header), 0 when unknown: a write shorter than it is the whole of
+    /// what its client wrote, one that fills it may be cut and go on.
+    write_room: u32 = 0,
     /// The serial of the pane the root's exec or look last ran a line at
     /// (the keyboard's), 0 before one: its err record names that pane.
     ran_at: u32 = 0,