mirage/partitions.ml

@@ -101,7 +101,7 @@ module Make(BLOCK : Mirage_block.S) = struct
     and md5s = get_part md5s and sha512s = get_part sha512s in
     { tar ; swap; git_dump ; md5s ; sha512s }
 
-  let format block ~cache_size ~git_size ~swap_size =
+  let format block ~sectors_cache ~sectors_git ~sectors_swap =
     let* { size_sectors; sector_size; _ } = BLOCK.get_info block in
     let ( let*? ) = Lwt_result.bind in
     (* ocaml-gpt uses a fixed size partition entries table. Create an empty GPT
@@ -110,16 +110,6 @@ module Make(BLOCK : Mirage_block.S) = struct
       Gpt.make ~sector_size ~disk_sectors:size_sectors []
       |> Result.get_ok
     in
-    let mb_in_sectors mb =
-      (* 1 megabyte is 2^20 bytes (1024 * 1024) *)
-      let mb_in_bytes = Int64.(shift_left (of_int mb) 20) in
-      let ss = Int64.of_int sector_size in
-      Int64.(div (add mb_in_bytes (sub ss 1L)) ss)
-    in
-    let sectors_cache = mb_in_sectors cache_size
-    and sectors_git = mb_in_sectors git_size
-    and sectors_swap = mb_in_sectors swap_size
-    in
     let*? () =
       if size_sectors <
          (* protective MBR + GPT header + GPT table *)
@@ -185,9 +175,9 @@ module Make(BLOCK : Mirage_block.S) = struct
       Gpt.make ~sector_size ~disk_sectors:size_sectors partitions
       |> Result.get_ok
     in
-    let buf =
-      Cstruct.create (sector_size * (Int64.to_int gpt.first_usable_lba + 2 * Tar.Header.length))
-    in
+  let buf =
+    Cstruct.create (sector_size * (Int64.to_int gpt.first_usable_lba + 2 * Tar.Header.length))
+  in
     Gptar.marshal_header ~sector_size buf gpt;
     Gpt.marshal_partition_table ~sector_size
       (Cstruct.shift buf (sector_size * Int64.to_int gpt.partition_entry_lba))

mirage/unikernel.ml

@@ -59,20 +59,20 @@ module K = struct
     let doc = Arg.info ~doc:"HTTP listen port." ["port"] in
     Mirage_runtime.register_arg Arg.(value & opt int 80 doc)
 
-  let cache_size =
-    let doc = "Number of MB reserved for each checksum cache (md5, sha512). Only used with --initialize-disk." in
-    let doc = Arg.info ~doc ["cache-size"] in
-    Mirage_runtime.register_arg Arg.(value & opt int 4 doc)
+  let sectors_cache =
+    let doc = "Number of sectors reserved for each checksum cache (md5, sha512). Only used with --initialize-disk." in
+    let doc = Arg.info ~doc ["sectors-cache"] in
+    Mirage_runtime.register_arg Arg.(value & opt int64 Int64.(mul 4L 2048L) doc)
 
-  let git_size =
-    let doc = "Number of MB reserved for git dump. Only used with --initialize-disk" in
-    let doc = Arg.info ~doc ["git-size"] in
-    Mirage_runtime.register_arg Arg.(value & opt int 40 doc)
+  let sectors_git =
+    let doc = "Number of sectors reserved for git dump. Only used with --initialize-disk" in
+    let doc = Arg.info ~doc ["sectors-git"] in
+    Mirage_runtime.register_arg Arg.(value & opt int64 Int64.(mul 40L (mul 2L 1024L)) doc)
 
-  let swap_size =
-    let doc = "Number of MB reserved for swap. Only used with --initialize-disk" in
-    let doc = Arg.info ~doc ["swap-size"] in
-    Mirage_runtime.register_arg Arg.(value & opt int 1024 doc)
+  let sectors_swap =
+    let doc = "Number of sectors reserved for swap. Only used with --initialize-disk" in
+    let doc = Arg.info ~doc ["sectors-swap"] in
+    Mirage_runtime.register_arg Arg.(value & opt int64 Int64.(mul 1024L 2048L) doc)
 
   let initialize_disk =
     let doc = "Initialize the disk with a partition table. THIS IS DESTRUCTIVE!" in
@@ -1123,11 +1123,11 @@ stamp: %S
 
   let start block _time _pclock stack git_ctx http_ctx =
     let initialize_disk = K.initialize_disk ()
-    and cache_size = K.cache_size ()
-    and git_size = K.git_size ()
-    and swap_size = K.swap_size () in
+    and sectors_cache = K.sectors_cache ()
+    and sectors_git = K.sectors_git ()
+    and sectors_swap = K.sectors_swap () in
     if initialize_disk then
-      Part.format block ~cache_size ~git_size ~swap_size >>= function
+      Part.format block ~sectors_cache ~sectors_git ~sectors_swap >>= function
       | Ok () ->
         Logs.app (fun m -> m "Successfully initialized the disk! You may restart now without --initialize-disk.");
         Lwt.return_unit