diff options
Diffstat (limited to 'src/9p.zig')
| -rw-r--r-- | src/9p.zig | 19 |
1 files changed, 17 insertions, 2 deletions
@@ -52,9 +52,16 @@ pub const msize_min = cloud9.fs.msize_min; /// The smallest msize a native listener offers (src/9p_io.zig). pub const min_msize: u32 = 4096; +/// What a native listener negotiates. +pub const msize: u32 = 8192; -/// The editor's engine: native fid count, native file names. -pub const editor: cloud9.fs.Options = .{ .fid_capacity = max_fids, .name_capacity = 255 }; +/// The editor's engine: native fid count, native file names, and room to +/// park a write of any size a frame can carry -- a request that would change +/// a pane while the editor is out in a syscall waits in the engine +/// (src/9p_io.zig, `serve`), and a write it cannot keep would fail instead. +/// The largest write is msize less the Twrite header, 23 bytes (the test +/// below asks a client), one byte more than `iohdrsz` allows for. +pub const editor: cloud9.fs.Options = .{ .fid_capacity = max_fids, .name_capacity = 255, .park_data_max = msize - 23 }; /// The board's engine: the GPIO firmware's budget (src/esp32p4_9p.zig). pub const board: cloud9.fs.Options = .{ .fid_capacity = board_fids, .name_capacity = board_name_capacity }; @@ -70,6 +77,14 @@ const Stub = struct { pub const Reply = cloud9.fs.Reply; }; +test "9p server: the editor's engine can park the largest write a client sends" { + var in: [4096]u8 = undefined; + var out: [4096]u8 = undefined; + var client: Client = .init(.{ .in = &in, .out = &out }); + client.msize = msize; + try testing.expect(editor.park_data_max >= client.maxWrite()); +} + test "9p server: board and native capacities size the actual fid storage" { const Board = Server(Stub, board); const Native = Server(Stub, editor); |