X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=src%2Fgenerator.ml;h=d94ec14663dcac853908e5648bbffe75dfa39c3e;hp=239f021f467b2f54062f94589df06fd0f69cfc97;hb=2f70ca487bee8babe5aef27f00a2131ea86ebd50;hpb=c7a3729f459a845f4e7b30c09ea378c54ee49c32

diff --git a/src/generator.ml b/src/generator.ml
index 239f021..d94ec14 100755
--- a/src/generator.ml
+++ b/src/generator.ml
@@ -66,15 +66,16 @@ and ret =
     (* "RString" and "RStringList" are caller-frees. *)
   | RString of string
   | RStringList of string
-    (* Some limited tuples are possible: *)
-  | RIntBool of string * string
-    (* LVM PVs, VGs and LVs. *)
-  | RPVList of string
-  | RVGList of string
-  | RLVList of string
-    (* Stat buffers. *)
-  | RStat of string
-  | RStatVFS of string
+    (* "RStruct" is a function which returns a single named structure
+     * or an error indication (in C, a struct, and in other languages
+     * with varying representations, but usually very efficient).  See
+     * after the function list below for the structures. 
+     *)
+  | RStruct of string * string		(* name of retval, name of struct *)
+    (* "RStructList" is a function which returns either a list/array
+     * of structures (could be zero-length), or an error indication.
+     *)
+  | RStructList of string * string	(* name of retval, name of struct *)
     (* Key-value pairs of untyped strings.  Turns into a hashtable or
      * dictionary in languages which support it.  DON'T use this as a
      * general "bucket" for results.  Prefer a stronger typed return
@@ -83,8 +84,6 @@ and ret =
      * inefficient.  Keys should be unique.  NULLs are not permitted.
      *)
   | RHashtable of string
-    (* List of directory entries (the result of readdir(3)). *)
-  | RDirentList of string
 
 and args = argt list	(* Function parameters, guestfs handle is implicit. *)
 
@@ -121,7 +120,7 @@ type flags =
   | NotInDocs		  (* do not add this function to documentation *)
 
 let protocol_limit_warning =
-  "Because of the message protocol, there is a transfer limit 
+  "Because of the message protocol, there is a transfer limit
 of somewhere between 2MB and 4MB.  To transfer large files you should use
 FTP."
 
@@ -281,12 +280,8 @@ let test_all_rets = [
   "test0rconststring", RConstString "valout";
   "test0rstring",      RString "valout";
   "test0rstringlist",  RStringList "valout";
-  "test0rintbool",     RIntBool ("valout", "valout");
-  "test0rpvlist",      RPVList "valout";
-  "test0rvglist",      RVGList "valout";
-  "test0rlvlist",      RLVList "valout";
-  "test0rstat",        RStat "valout";
-  "test0rstatvfs",     RStatVFS "valout";
+  "test0rstruct",      RStruct ("valout", "lvm_pv");
+  "test0rstructlist",  RStructList ("valout", "lvm_pv");
   "test0rhashtable",   RHashtable "valout";
 ]
 
@@ -632,6 +627,15 @@ then this returns the compiled-in default value for memsize.
 For more information on the architecture of libguestfs,
 see L<guestfs(3)>.");
 
+  ("get_pid", (RInt "pid", []), -1, [FishAlias "pid"],
+   [],
+   "get PID of qemu subprocess",
+   "\
+Return the process ID of the qemu subprocess.  If there is no
+qemu subprocess, then this will return an error.
+
+This is an internal call used for debugging and testing.");
+
 ]
 
 (* daemon_functions are any functions which cause some action
@@ -641,7 +645,7 @@ see L<guestfs(3)>.");
 let daemon_functions = [
   ("mount", (RErr, [String "device"; String "mountpoint"]), 1, [],
    [InitEmpty, Always, TestOutput (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ext2"; "/dev/sda1"];
        ["mount"; "/dev/sda1"; "/"];
        ["write_file"; "/new"; "new file contents"; "0"];
@@ -738,7 +742,7 @@ The full block device names are returned, eg. C</dev/sda>");
    [InitBasicFS, Always, TestOutputListOfDevices (
       [["list_partitions"]], ["/dev/sda1"]);
     InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["list_partitions"]], ["/dev/sda1"; "/dev/sda2"; "/dev/sda3"])],
    "list the partitions",
    "\
@@ -753,7 +757,7 @@ call C<guestfs_lvs>.");
    [InitBasicFSonLVM, Always, TestOutputListOfDevices (
       [["pvs"]], ["/dev/sda1"]);
     InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["pvcreate"; "/dev/sda1"];
        ["pvcreate"; "/dev/sda2"];
        ["pvcreate"; "/dev/sda3"];
@@ -772,7 +776,7 @@ See also C<guestfs_pvs_full>.");
    [InitBasicFSonLVM, Always, TestOutputList (
       [["vgs"]], ["VG"]);
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["pvcreate"; "/dev/sda1"];
        ["pvcreate"; "/dev/sda2"];
        ["pvcreate"; "/dev/sda3"];
@@ -793,7 +797,7 @@ See also C<guestfs_vgs_full>.");
    [InitBasicFSonLVM, Always, TestOutputList (
       [["lvs"]], ["/dev/VG/LV"]);
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["pvcreate"; "/dev/sda1"];
        ["pvcreate"; "/dev/sda2"];
        ["pvcreate"; "/dev/sda3"];
@@ -813,21 +817,21 @@ This returns a list of the logical volume device names
 
 See also C<guestfs_lvs_full>.");
 
-  ("pvs_full", (RPVList "physvols", []), 12, [],
+  ("pvs_full", (RStructList ("physvols", "lvm_pv"), []), 12, [],
    [], (* XXX how to test? *)
    "list the LVM physical volumes (PVs)",
    "\
 List all the physical volumes detected.  This is the equivalent
 of the L<pvs(8)> command.  The \"full\" version includes all fields.");
 
-  ("vgs_full", (RVGList "volgroups", []), 13, [],
+  ("vgs_full", (RStructList ("volgroups", "lvm_vg"), []), 13, [],
    [], (* XXX how to test? *)
    "list the LVM volume groups (VGs)",
    "\
 List all the volumes groups detected.  This is the equivalent
 of the L<vgs(8)> command.  The \"full\" version includes all fields.");
 
-  ("lvs_full", (RLVList "logvols", []), 14, [],
+  ("lvs_full", (RStructList ("logvols", "lvm_lv"), []), 14, [],
    [], (* XXX how to test? *)
    "list the LVM logical volumes (LVs)",
    "\
@@ -924,7 +928,7 @@ undefined.
 On success this returns the number of nodes in C<expr>, or
 C<0> if C<expr> evaluates to something which is not a nodeset.");
 
-  ("aug_defnode", (RIntBool ("nrnodes", "created"), [String "name"; String "expr"; String "val"]), 18, [],
+  ("aug_defnode", (RStruct ("nrnodescreated", "int_bool"), [String "name"; String "expr"; String "val"]), 18, [],
    [], (* XXX Augeas code needs tests. *)
    "define an Augeas node",
    "\
@@ -1146,7 +1150,7 @@ See also C<guestfs_stat>.");
 
   ("pvcreate", (RErr, [String "device"]), 39, [],
    [InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["pvcreate"; "/dev/sda1"];
        ["pvcreate"; "/dev/sda2"];
        ["pvcreate"; "/dev/sda3"];
@@ -1159,7 +1163,7 @@ as C</dev/sda1>.");
 
   ("vgcreate", (RErr, [String "volgroup"; StringList "physvols"]), 40, [],
    [InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["pvcreate"; "/dev/sda1"];
        ["pvcreate"; "/dev/sda2"];
        ["pvcreate"; "/dev/sda3"];
@@ -1173,7 +1177,7 @@ from the non-empty list of physical volumes C<physvols>.");
 
   ("lvcreate", (RErr, [String "logvol"; String "volgroup"; Int "mbytes"]), 41, [],
    [InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["pvcreate"; "/dev/sda1"];
        ["pvcreate"; "/dev/sda2"];
        ["pvcreate"; "/dev/sda3"];
@@ -1194,7 +1198,7 @@ on the volume group C<volgroup>, with C<size> megabytes.");
 
   ("mkfs", (RErr, [String "fstype"; String "device"]), 42, [],
    [InitEmpty, Always, TestOutput (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ext2"; "/dev/sda1"];
        ["mount"; "/dev/sda1"; "/"];
        ["write_file"; "/new"; "new file contents"; "0"];
@@ -1269,12 +1273,12 @@ use C<guestfs_upload>.");
 
   ("umount", (RErr, [String "pathordevice"]), 45, [FishAlias "unmount"],
    [InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ext2"; "/dev/sda1"];
        ["mount"; "/dev/sda1"; "/"];
        ["mounts"]], ["/dev/sda1"]);
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ext2"; "/dev/sda1"];
        ["mount"; "/dev/sda1"; "/"];
        ["umount"; "/"];
@@ -1301,7 +1305,7 @@ Some internal mounts are not shown.");
        ["mounts"]], []);
     (* check that umount_all can unmount nested mounts correctly: *)
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ",200 ,400 ,"];
+      [["sfdiskM"; "/dev/sda"; ",100 ,200 ,"];
        ["mkfs"; "ext2"; "/dev/sda1"];
        ["mkfs"; "ext2"; "/dev/sda2"];
        ["mkfs"; "ext2"; "/dev/sda3"];
@@ -1478,7 +1482,7 @@ result into a list of lines.
 
 See also: C<guestfs_sh_lines>");
 
-  ("stat", (RStat "statbuf", [String "path"]), 52, [],
+  ("stat", (RStruct ("statbuf", "stat"), [String "path"]), 52, [],
    [InitBasicFS, Always, TestOutputStruct (
       [["touch"; "/new"];
        ["stat"; "/new"]], [CompareWithInt ("size", 0)])],
@@ -1488,7 +1492,7 @@ Returns file information for the given C<path>.
 
 This is the same as the C<stat(2)> system call.");
 
-  ("lstat", (RStat "statbuf", [String "path"]), 53, [],
+  ("lstat", (RStruct ("statbuf", "stat"), [String "path"]), 53, [],
    [InitBasicFS, Always, TestOutputStruct (
       [["touch"; "/new"];
        ["lstat"; "/new"]], [CompareWithInt ("size", 0)])],
@@ -1502,7 +1506,7 @@ refers to.
 
 This is the same as the C<lstat(2)> system call.");
 
-  ("statvfs", (RStatVFS "statbuf", [String "path"]), 54, [],
+  ("statvfs", (RStruct ("statbuf", "statvfs"), [String "path"]), 54, [],
    [InitBasicFS, Always, TestOutputStruct (
       [["statvfs"; "/"]], [CompareWithInt ("namemax", 255);
 			   CompareWithInt ("bsize", 1024)])],
@@ -1825,7 +1829,7 @@ to find out what you can do.");
 
   ("lvremove", (RErr, [String "device"]), 77, [],
    [InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1833,7 +1837,7 @@ to find out what you can do.");
        ["lvremove"; "/dev/VG/LV1"];
        ["lvs"]], ["/dev/VG/LV2"]);
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1841,7 +1845,7 @@ to find out what you can do.");
        ["lvremove"; "/dev/VG"];
        ["lvs"]], []);
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1858,7 +1862,7 @@ the VG name, C</dev/VG>.");
 
   ("vgremove", (RErr, [String "vgname"]), 78, [],
    [InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1866,7 +1870,7 @@ the VG name, C</dev/VG>.");
        ["vgremove"; "VG"];
        ["lvs"]], []);
     InitEmpty, Always, TestOutputList (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1882,7 +1886,7 @@ group (if any).");
 
   ("pvremove", (RErr, [String "device"]), 79, [],
    [InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1891,7 +1895,7 @@ group (if any).");
        ["pvremove"; "/dev/sda1"];
        ["lvs"]], []);
     InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -1900,7 +1904,7 @@ group (if any).");
        ["pvremove"; "/dev/sda1"];
        ["vgs"]], []);
     InitEmpty, Always, TestOutputListOfDevices (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["pvcreate"; "/dev/sda1"];
        ["vgcreate"; "VG"; "/dev/sda1"];
        ["lvcreate"; "LV1"; "VG"; "50"];
@@ -2181,7 +2185,7 @@ the human-readable, canonical hex dump of the file.");
 
   ("zerofree", (RErr, [String "device"]), 97, [],
    [InitNone, Always, TestOutput (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ext3"; "/dev/sda1"];
        ["mount"; "/dev/sda1"; "/"];
        ["write_file"; "/new"; "test file"; "0"];
@@ -2279,7 +2283,7 @@ are activated or deactivated.");
 
   ("lvresize", (RErr, [String "device"; Int "mbytes"]), 105, [],
    [InitNone, Always, TestOutput (
-    [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+    [["sfdiskM"; "/dev/sda"; ","];
      ["pvcreate"; "/dev/sda1"];
      ["vgcreate"; "VG"; "/dev/sda1"];
      ["lvcreate"; "LV"; "VG"; "10"];
@@ -2370,11 +2374,11 @@ Sleep for C<secs> seconds.");
 
   ("ntfs_3g_probe", (RInt "status", [Bool "rw"; String "device"]), 110, [],
    [InitNone, Always, TestOutputInt (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ntfs"; "/dev/sda1"];
        ["ntfs_3g_probe"; "true"; "/dev/sda1"]], 0);
     InitNone, Always, TestOutputInt (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkfs"; "ext2"; "/dev/sda1"];
        ["ntfs_3g_probe"; "true"; "/dev/sda1"]], 12)],
    "probe NTFS volume",
@@ -2661,7 +2665,7 @@ the command C<mount -o loop file mountpoint>.");
 
   ("mkswap", (RErr, [String "device"]), 130, [],
    [InitEmpty, Always, TestRun (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkswap"; "/dev/sda1"]])],
    "create a swap partition",
    "\
@@ -2669,7 +2673,7 @@ Create a swap partition on C<device>.");
 
   ("mkswap_L", (RErr, [String "label"; String "device"]), 131, [],
    [InitEmpty, Always, TestRun (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkswap_L"; "hello"; "/dev/sda1"]])],
    "create a swap partition with a label",
    "\
@@ -2677,7 +2681,7 @@ Create a swap partition on C<device> with label C<label>.");
 
   ("mkswap_U", (RErr, [String "uuid"; String "device"]), 132, [],
    [InitEmpty, Always, TestRun (
-      [["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+      [["sfdiskM"; "/dev/sda"; ","];
        ["mkswap_U"; "a3a61220-882b-4f61-89f4-cf24dcc7297d"; "/dev/sda1"]])],
    "create a swap partition with an explicit UUID",
    "\
@@ -2753,7 +2757,7 @@ See also L<umask(2)>, C<guestfs_mknod>, C<guestfs_mkdir>.
 
 This call returns the previous umask.");
 
-  ("readdir", (RDirentList "entries", [String "dir"]), 138, [],
+  ("readdir", (RStructList ("entries", "dirent"), [String "dir"]), 138, [],
    [],
    "read directories entries",
    "\
@@ -2767,6 +2771,18 @@ This function is primarily intended for use by programs.  To
 get a simple list of names, use C<guestfs_ls>.  To get a printable
 directory for human consumption, use C<guestfs_ll>.");
 
+  ("sfdiskM", (RErr, [String "device"; StringList "lines"]), 139, [DangerWillRobinson],
+   [],
+   "create partitions on a block device",
+   "\
+This is a simplified interface to the C<guestfs_sfdisk>
+command, where partition sizes are specified in megabytes
+only (rounded to the nearest cylinder) and you don't need
+to specify the cyls, heads and sectors parameters which
+were rarely if ever used anyway.
+
+See also C<guestfs_sfdisk> and the L<sfdisk(8)> manpage.");
+
 ]
 
 let all_functions = non_daemon_functions @ daemon_functions
@@ -2778,107 +2794,153 @@ let all_functions_sorted =
   List.sort (fun (n1,_,_,_,_,_,_) (n2,_,_,_,_,_,_) ->
 	       compare n1 n2) all_functions
 
-(* Column names and types from LVM PVs/VGs/LVs. *)
-let pv_cols = [
-  "pv_name", `String;
-  "pv_uuid", `UUID;
-  "pv_fmt", `String;
-  "pv_size", `Bytes;
-  "dev_size", `Bytes;
-  "pv_free", `Bytes;
-  "pv_used", `Bytes;
-  "pv_attr", `String (* XXX *);
-  "pv_pe_count", `Int;
-  "pv_pe_alloc_count", `Int;
-  "pv_tags", `String;
-  "pe_start", `Bytes;
-  "pv_mda_count", `Int;
-  "pv_mda_free", `Bytes;
-(* Not in Fedora 10:
-  "pv_mda_size", `Bytes;
-*)
+(* Field types for structures. *)
+type field =
+  | FChar			(* C 'char' (really, a 7 bit byte). *)
+  | FString			(* nul-terminated ASCII string. *)
+  | FUInt32
+  | FInt32
+  | FUInt64
+  | FInt64
+  | FBytes		        (* Any int measure that counts bytes. *)
+  | FUUID			(* 32 bytes long, NOT nul-terminated. *)
+  | FOptPercent			(* [0..100], or -1 meaning "not present". *)
+
+(* Because we generate extra parsing code for LVM command line tools,
+ * we have to pull out the LVM columns separately here.
+ *)
+let lvm_pv_cols = [
+  "pv_name", FString;
+  "pv_uuid", FUUID;
+  "pv_fmt", FString;
+  "pv_size", FBytes;
+  "dev_size", FBytes;
+  "pv_free", FBytes;
+  "pv_used", FBytes;
+  "pv_attr", FString (* XXX *);
+  "pv_pe_count", FInt64;
+  "pv_pe_alloc_count", FInt64;
+  "pv_tags", FString;
+  "pe_start", FBytes;
+  "pv_mda_count", FInt64;
+  "pv_mda_free", FBytes;
+  (* Not in Fedora 10:
+     "pv_mda_size", FBytes;
+  *)
 ]
-let vg_cols = [
-  "vg_name", `String;
-  "vg_uuid", `UUID;
-  "vg_fmt", `String;
-  "vg_attr", `String (* XXX *);
-  "vg_size", `Bytes;
-  "vg_free", `Bytes;
-  "vg_sysid", `String;
-  "vg_extent_size", `Bytes;
-  "vg_extent_count", `Int;
-  "vg_free_count", `Int;
-  "max_lv", `Int;
-  "max_pv", `Int;
-  "pv_count", `Int;
-  "lv_count", `Int;
-  "snap_count", `Int;
-  "vg_seqno", `Int;
-  "vg_tags", `String;
-  "vg_mda_count", `Int;
-  "vg_mda_free", `Bytes;
-(* Not in Fedora 10:
-  "vg_mda_size", `Bytes;
-*)
+let lvm_vg_cols = [
+  "vg_name", FString;
+  "vg_uuid", FUUID;
+  "vg_fmt", FString;
+  "vg_attr", FString (* XXX *);
+  "vg_size", FBytes;
+  "vg_free", FBytes;
+  "vg_sysid", FString;
+  "vg_extent_size", FBytes;
+  "vg_extent_count", FInt64;
+  "vg_free_count", FInt64;
+  "max_lv", FInt64;
+  "max_pv", FInt64;
+  "pv_count", FInt64;
+  "lv_count", FInt64;
+  "snap_count", FInt64;
+  "vg_seqno", FInt64;
+  "vg_tags", FString;
+  "vg_mda_count", FInt64;
+  "vg_mda_free", FBytes;
+  (* Not in Fedora 10:
+     "vg_mda_size", FBytes;
+  *)
 ]
-let lv_cols = [
-  "lv_name", `String;
-  "lv_uuid", `UUID;
-  "lv_attr", `String (* XXX *);
-  "lv_major", `Int;
-  "lv_minor", `Int;
-  "lv_kernel_major", `Int;
-  "lv_kernel_minor", `Int;
-  "lv_size", `Bytes;
-  "seg_count", `Int;
-  "origin", `String;
-  "snap_percent", `OptPercent;
-  "copy_percent", `OptPercent;
-  "move_pv", `String;
-  "lv_tags", `String;
-  "mirror_log", `String;
-  "modules", `String;
+let lvm_lv_cols = [
+  "lv_name", FString;
+  "lv_uuid", FUUID;
+  "lv_attr", FString (* XXX *);
+  "lv_major", FInt64;
+  "lv_minor", FInt64;
+  "lv_kernel_major", FInt64;
+  "lv_kernel_minor", FInt64;
+  "lv_size", FBytes;
+  "seg_count", FInt64;
+  "origin", FString;
+  "snap_percent", FOptPercent;
+  "copy_percent", FOptPercent;
+  "move_pv", FString;
+  "lv_tags", FString;
+  "mirror_log", FString;
+  "modules", FString;
 ]
 
-(* Column names and types from stat structures.
- * NB. Can't use things like 'st_atime' because glibc header files
- * define some of these as macros.  Ugh.
+(* Names and fields in all structures (in RStruct and RStructList)
+ * that we support.
  *)
-let stat_cols = [
-  "dev", `Int;
-  "ino", `Int;
-  "mode", `Int;
-  "nlink", `Int;
-  "uid", `Int;
-  "gid", `Int;
-  "rdev", `Int;
-  "size", `Int;
-  "blksize", `Int;
-  "blocks", `Int;
-  "atime", `Int;
-  "mtime", `Int;
-  "ctime", `Int;
-]
-let statvfs_cols = [
-  "bsize", `Int;
-  "frsize", `Int;
-  "blocks", `Int;
-  "bfree", `Int;
-  "bavail", `Int;
-  "files", `Int;
-  "ffree", `Int;
-  "favail", `Int;
-  "fsid", `Int;
-  "flag", `Int;
-  "namemax", `Int;
-]
-
-(* Column names in dirent structure. *)
-let dirent_cols = [
-  "ino", `Int;
-  "ftyp", `Char; (* 'b' 'c' 'd' 'f' (FIFO) 'l' 'r' (regular file) 's' 'u' '?' *)
-  "name", `String;
+let structs = [
+  (* The old RIntBool return type, only ever used for aug_defnode.  Do
+   * not use this struct in any new code.
+   *)
+  "int_bool", [
+    "i", FInt32;		(* for historical compatibility *)
+    "b", FInt32;		(* for historical compatibility *)
+  ];
+
+  (* LVM PVs, VGs, LVs. *)
+  "lvm_pv", lvm_pv_cols;
+  "lvm_vg", lvm_vg_cols;
+  "lvm_lv", lvm_lv_cols;
+
+  (* Column names and types from stat structures.
+   * NB. Can't use things like 'st_atime' because glibc header files
+   * define some of these as macros.  Ugh.
+   *)
+  "stat", [
+    "dev", FInt64;
+    "ino", FInt64;
+    "mode", FInt64;
+    "nlink", FInt64;
+    "uid", FInt64;
+    "gid", FInt64;
+    "rdev", FInt64;
+    "size", FInt64;
+    "blksize", FInt64;
+    "blocks", FInt64;
+    "atime", FInt64;
+    "mtime", FInt64;
+    "ctime", FInt64;
+  ];
+  "statvfs", [
+    "bsize", FInt64;
+    "frsize", FInt64;
+    "blocks", FInt64;
+    "bfree", FInt64;
+    "bavail", FInt64;
+    "files", FInt64;
+    "ffree", FInt64;
+    "favail", FInt64;
+    "fsid", FInt64;
+    "flag", FInt64;
+    "namemax", FInt64;
+  ];
+
+  (* Column names in dirent structure. *)
+  "dirent", [
+    "ino", FInt64;
+    (* 'b' 'c' 'd' 'f' (FIFO) 'l' 'r' (regular file) 's' 'u' '?' *)
+    "ftyp", FChar;
+    "name", FString;
+  ];
+] (* end of structs *)
+
+(* Ugh, Java has to be different ..
+ * These names are also used by the Haskell bindings.
+ *)
+let java_structs = [
+  "int_bool", "IntBool";
+  "lvm_pv", "PV";
+  "lvm_vg", "VG";
+  "lvm_lv", "LV";
+  "stat", "Stat";
+  "statvfs", "StatVFS";
+  "dirent", "Dirent"
 ]
 
 (* Used for testing language bindings. *)
@@ -3015,6 +3077,17 @@ let name_of_argt = function
   | String n | OptString n | StringList n | Bool n | Int n
   | FileIn n | FileOut n -> n
 
+let java_name_of_struct typ =
+  try List.assoc typ java_structs
+  with Not_found ->
+    failwithf
+      "java_name_of_struct: no java_structs entry corresponding to %s" typ
+
+let cols_of_struct typ =
+  try List.assoc typ structs
+  with Not_found ->
+    failwithf "cols_of_struct: unknown struct %s" typ
+
 let seq_of_test = function
   | TestRun s | TestOutput (s, _) | TestOutputList (s, _)
   | TestOutputListOfDevices (s, _)
@@ -3074,14 +3147,9 @@ let check_functions () =
       (match fst style with
        | RErr -> ()
        | RInt n | RInt64 n | RBool n | RConstString n | RString n
-       | RStringList n | RPVList n | RVGList n | RLVList n
-       | RStat n | RStatVFS n
-       | RHashtable n
-       | RDirentList n ->
+       | RStringList n | RStruct (n, _) | RStructList (n, _)
+       | RHashtable n ->
 	   check_arg_ret_name n
-       | RIntBool (n,m) ->
-	   check_arg_ret_name n;
-	   check_arg_ret_name m
       );
       List.iter (fun arg -> check_arg_ret_name (name_of_argt arg)) (snd style)
   ) all_functions;
@@ -3247,46 +3315,21 @@ I<The caller must free the returned string after use>.\n\n"
 	     pr "This function returns a NULL-terminated array of strings
 (like L<environ(3)>), or NULL if there was an error.
 I<The caller must free the strings and the array after use>.\n\n"
-	 | RIntBool _ ->
-	     pr "This function returns a C<struct guestfs_int_bool *>,
-or NULL if there was an error.
-I<The caller must call C<guestfs_free_int_bool> after use>.\n\n"
-	 | RPVList _ ->
-	     pr "This function returns a C<struct guestfs_lvm_pv_list *>
-(see E<lt>guestfs-structs.hE<gt>),
+	 | RStruct (_, typ) ->
+	     pr "This function returns a C<struct guestfs_%s *>,
 or NULL if there was an error.
-I<The caller must call C<guestfs_free_lvm_pv_list> after use>.\n\n"
-	 | RVGList _ ->
-	     pr "This function returns a C<struct guestfs_lvm_vg_list *>
+I<The caller must call C<guestfs_free_%s> after use>.\n\n" typ typ
+	 | RStructList (_, typ) ->
+	     pr "This function returns a C<struct guestfs_%s_list *>
 (see E<lt>guestfs-structs.hE<gt>),
 or NULL if there was an error.
-I<The caller must call C<guestfs_free_lvm_vg_list> after use>.\n\n"
-	 | RLVList _ ->
-	     pr "This function returns a C<struct guestfs_lvm_lv_list *>
-(see E<lt>guestfs-structs.hE<gt>),
-or NULL if there was an error.
-I<The caller must call C<guestfs_free_lvm_lv_list> after use>.\n\n"
-	 | RStat _ ->
-	     pr "This function returns a C<struct guestfs_stat *>
-(see L<stat(2)> and E<lt>guestfs-structs.hE<gt>),
-or NULL if there was an error.
-I<The caller must call C<free> after use>.\n\n"
-	 | RStatVFS _ ->
-	     pr "This function returns a C<struct guestfs_statvfs *>
-(see L<statvfs(2)> and E<lt>guestfs-structs.hE<gt>),
-or NULL if there was an error.
-I<The caller must call C<free> after use>.\n\n"
+I<The caller must call C<guestfs_free_%s_list> after use>.\n\n" typ typ
 	 | RHashtable _ ->
 	     pr "This function returns a NULL-terminated array of
 strings, or NULL if there was an error.
 The array of strings will always have length C<2n+1>, where
 C<n> keys and values alternate, followed by the trailing NULL entry.
 I<The caller must free the strings and the array after use>.\n\n"
-	 | RDirentList _ ->
-	     pr "This function returns a C<struct guestfs_dirent_list *>
-(see E<lt>guestfs-structs.hE<gt>),
-or NULL if there was an error.
-I<The caller must call C<guestfs_free_dirent_list> after use>.\n\n"
 	);
 	if List.mem ProtocolLimitWarning flags then
 	  pr "%s\n\n" protocol_limit_warning;
@@ -3296,68 +3339,39 @@ I<The caller must call C<guestfs_free_dirent_list> after use>.\n\n"
   ) all_functions_sorted
 
 and generate_structs_pod () =
-  (* LVM structs documentation. *)
+  (* Structs documentation. *)
   List.iter (
     fun (typ, cols) ->
-      pr "=head2 guestfs_lvm_%s\n" typ;
+      pr "=head2 guestfs_%s\n" typ;
       pr "\n";
-      pr " struct guestfs_lvm_%s {\n" typ;
+      pr " struct guestfs_%s {\n" typ;
       List.iter (
 	function
-	| name, `String -> pr "  char *%s;\n" name
-	| name, `UUID ->
-	    pr "  /* The next field is NOT nul-terminated, be careful when printing it: */\n";
-	    pr "  char %s[32];\n" name
-	| name, `Bytes -> pr "  uint64_t %s;\n" name
-	| name, `Int -> pr "  int64_t %s;\n" name
-	| name, `OptPercent ->
-	    pr "  /* The next field is [0..100] or -1 meaning 'not present': */\n";
-	    pr "  float %s;\n" name
+	| name, FChar -> pr "   char %s;\n" name
+	| name, FUInt32 -> pr "   uint32_t %s;\n" name
+	| name, FInt32 -> pr "   int32_t %s;\n" name
+	| name, (FUInt64|FBytes) -> pr "   uint64_t %s;\n" name
+	| name, FInt64 -> pr "   int64_t %s;\n" name
+	| name, FString -> pr "   char *%s;\n" name
+	| name, FUUID ->
+	    pr "   /* The next field is NOT nul-terminated, be careful when printing it: */\n";
+	    pr "   char %s[32];\n" name
+	| name, FOptPercent ->
+	    pr "   /* The next field is [0..100] or -1 meaning 'not present': */\n";
+	    pr "   float %s;\n" name
       ) cols;
+      pr " };\n";
       pr " \n";
-      pr " struct guestfs_lvm_%s_list {\n" typ;
+      pr " struct guestfs_%s_list {\n" typ;
       pr "   uint32_t len; /* Number of elements in list. */\n";
-      pr "   struct guestfs_lvm_%s *val; /* Elements. */\n" typ;
+      pr "   struct guestfs_%s *val; /* Elements. */\n" typ;
       pr " };\n";
       pr " \n";
-      pr " void guestfs_free_lvm_%s_list (struct guestfs_free_lvm_%s_list *);\n"
+      pr " void guestfs_free_%s (struct guestfs_free_%s *);\n" typ typ;
+      pr " void guestfs_free_%s_list (struct guestfs_free_%s_list *);\n"
 	typ typ;
       pr "\n"
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols];
-
-  (* Stat *)
-  List.iter (
-    fun (typ, cols) ->
-      pr "=head2 guestfs_%s\n" typ;
-      pr "\n";
-      pr " struct guestfs_%s {\n" typ;
-      List.iter (
-	function
-	| name, `Int -> pr "   int64_t %s;\n" name
-      ) cols;
-      pr " };\n";
-      pr "\n";
-  ) [ "stat", stat_cols; "statvfs", statvfs_cols ];
-
-  (* DirentList *)
-  pr "=head2 guestfs_dirent\n";
-  pr "\n";
-  pr " struct guestfs_dirent {\n";
-  List.iter (
-    function
-    | name, `String -> pr "   char *%s;\n" name
-    | name, `Int -> pr "   int64_t %s;\n" name
-    | name, `Char -> pr "   char %s;\n" name
-  ) dirent_cols;
-  pr " };\n";
-  pr "\n";
-  pr " struct guestfs_dirent_list {\n";
-  pr "   uint32_t len; /* Number of elements in list. */\n";
-  pr "   struct guestfs_dirent *val; /* Elements. */\n";
-  pr " };\n";
-  pr " \n";
-  pr " void guestfs_free_dirent_list (struct guestfs_free_dirent_list *);\n";
-  pr "\n"
+  ) structs
 
 (* Generate the protocol (XDR) file, 'guestfs_protocol.x' and
  * indirectly 'guestfs_protocol.h' and 'guestfs_protocol.c'.
@@ -3374,47 +3388,24 @@ and generate_xdr () =
   pr "typedef string str<>;\n";
   pr "\n";
 
-  (* LVM internal structures. *)
-  List.iter (
-    function
-    | typ, cols ->
-	pr "struct guestfs_lvm_int_%s {\n" typ;
-	List.iter (function
-		   | name, `String -> pr "  string %s<>;\n" name
-		   | name, `UUID -> pr "  opaque %s[32];\n" name
-		   | name, `Bytes -> pr "  hyper %s;\n" name
-		   | name, `Int -> pr "  hyper %s;\n" name
-		   | name, `OptPercent -> pr "  float %s;\n" name
-		  ) cols;
-	pr "};\n";
-	pr "\n";
-	pr "typedef struct guestfs_lvm_int_%s guestfs_lvm_int_%s_list<>;\n" typ typ;
-	pr "\n";
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols];
-
-  (* Stat internal structures. *)
+  (* Internal structures. *)
   List.iter (
     function
     | typ, cols ->
 	pr "struct guestfs_int_%s {\n" typ;
 	List.iter (function
-		   | name, `Int -> pr "  hyper %s;\n" name
+		   | name, FChar -> pr "  char %s;\n" name
+		   | name, FString -> pr "  string %s<>;\n" name
+		   | name, FUUID -> pr "  opaque %s[32];\n" name
+		   | name, (FInt32|FUInt32) -> pr "  int %s;\n" name
+		   | name, (FInt64|FUInt64|FBytes) -> pr "  hyper %s;\n" name
+		   | name, FOptPercent -> pr "  float %s;\n" name
 		  ) cols;
 	pr "};\n";
 	pr "\n";
-  ) ["stat", stat_cols; "statvfs", statvfs_cols];
-
-  (* Dirent structures. *)
-  pr "struct guestfs_int_dirent {\n";
-  List.iter (function
-	     | name, `Int -> pr "  hyper %s;\n" name
-	     | name, `Char -> pr "  char %s;\n" name
-	     | name, `String -> pr "  string %s<>;\n" name
-	    ) dirent_cols;
-  pr "};\n";
-  pr "\n";
-  pr "typedef struct guestfs_int_dirent guestfs_int_dirent_list<>;\n";
-  pr "\n";
+	pr "typedef struct guestfs_int_%s guestfs_int_%s_list<>;\n" typ typ;
+	pr "\n";
+  ) structs;
 
   List.iter (
     fun (shortname, style, _, _, _, _, _) ->
@@ -3459,39 +3450,18 @@ and generate_xdr () =
 	   pr "struct %s_ret {\n" name;
 	   pr "  str %s<>;\n" n;
 	   pr "};\n\n"
-       | RIntBool (n,m) ->
-	   pr "struct %s_ret {\n" name;
-	   pr "  int %s;\n" n;
-	   pr "  bool %s;\n" m;
-	   pr "};\n\n"
-       | RPVList n ->
-	   pr "struct %s_ret {\n" name;
-	   pr "  guestfs_lvm_int_pv_list %s;\n" n;
-	   pr "};\n\n"
-       | RVGList n ->
+       | RStruct (n, typ) ->
 	   pr "struct %s_ret {\n" name;
-	   pr "  guestfs_lvm_int_vg_list %s;\n" n;
+	   pr "  guestfs_int_%s %s;\n" typ n;
 	   pr "};\n\n"
-       | RLVList n ->
+       | RStructList (n, typ) ->
 	   pr "struct %s_ret {\n" name;
-	   pr "  guestfs_lvm_int_lv_list %s;\n" n;
-	   pr "};\n\n"
-       | RStat n ->
-	   pr "struct %s_ret {\n" name;
-	   pr "  guestfs_int_stat %s;\n" n;
-	   pr "};\n\n"
-       | RStatVFS n ->
-	   pr "struct %s_ret {\n" name;
-	   pr "  guestfs_int_statvfs %s;\n" n;
+	   pr "  guestfs_int_%s_list %s;\n" typ n;
 	   pr "};\n\n"
        | RHashtable n ->
 	   pr "struct %s_ret {\n" name;
 	   pr "  str %s<>;\n" n;
 	   pr "};\n\n"
-       | RDirentList n ->
-	   pr "struct %s_ret {\n" name;
-	   pr "  guestfs_int_dirent_list %s;\n" n;
-	   pr "};\n\n"
       );
   ) daemon_functions;
 
@@ -3579,63 +3549,32 @@ and generate_structs_h () =
    * must be identical to what rpcgen / the RFC defines.
    *)
 
-  (* guestfs_int_bool structure. *)
-  pr "struct guestfs_int_bool {\n";
-  pr "  int32_t i;\n";
-  pr "  int32_t b;\n";
-  pr "};\n";
-  pr "\n";
-
-  (* LVM public structures. *)
+  (* Public structures. *)
   List.iter (
-    function
-    | typ, cols ->
-	pr "struct guestfs_lvm_%s {\n" typ;
-	List.iter (
-	  function
-	  | name, `String -> pr "  char *%s;\n" name
-	  | name, `UUID -> pr "  char %s[32]; /* this is NOT nul-terminated, be careful when printing */\n" name
-	  | name, `Bytes -> pr "  uint64_t %s;\n" name
-	  | name, `Int -> pr "  int64_t %s;\n" name
-	  | name, `OptPercent -> pr "  float %s; /* [0..100] or -1 */\n" name
-	) cols;
-	pr "};\n";
-	pr "\n";
-	pr "struct guestfs_lvm_%s_list {\n" typ;
-	pr "  uint32_t len;\n";
-	pr "  struct guestfs_lvm_%s *val;\n" typ;
-	pr "};\n";
-	pr "\n"
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols];
-
-  (* Stat structures. *)
-  List.iter (
-    function
-    | typ, cols ->
-	pr "struct guestfs_%s {\n" typ;
-	List.iter (
-	  function
-	  | name, `Int -> pr "  int64_t %s;\n" name
-	) cols;
-	pr "};\n";
-	pr "\n"
-  ) ["stat", stat_cols; "statvfs", statvfs_cols];
-
-  (* Dirent structures. *)
-  pr "struct guestfs_dirent {\n";
-  List.iter (
-    function
-    | name, `Int -> pr "  int64_t %s;\n" name
-    | name, `Char -> pr "  char %s;\n" name
-    | name, `String -> pr "  char *%s;\n" name
-  ) dirent_cols;
-  pr "};\n";
-  pr "\n";
-  pr "struct guestfs_dirent_list {\n";
-  pr "  uint32_t len;\n";
-  pr "  struct guestfs_dirent *val;\n";
-  pr "};\n";
-  pr "\n"
+    fun (typ, cols) ->
+      pr "struct guestfs_%s {\n" typ;
+      List.iter (
+	function
+	| name, FChar -> pr "  char %s;\n" name
+	| name, FString -> pr "  char *%s;\n" name
+	| name, FUUID -> pr "  char %s[32]; /* this is NOT nul-terminated, be careful when printing */\n" name
+	| name, FUInt32 -> pr "  uint32_t %s;\n" name
+	| name, FInt32 -> pr "  int32_t %s;\n" name
+	| name, (FUInt64|FBytes) -> pr "  uint64_t %s;\n" name
+	| name, FInt64 -> pr "  int64_t %s;\n" name
+	| name, FOptPercent -> pr "  float %s; /* [0..100] or -1 */\n" name
+      ) cols;
+      pr "};\n";
+      pr "\n";
+      pr "struct guestfs_%s_list {\n" typ;
+      pr "  uint32_t len;\n";
+      pr "  struct guestfs_%s *val;\n" typ;
+      pr "};\n";
+      pr "\n";
+      pr "extern void guestfs_free_%s (struct guestfs_%s *);\n" typ typ;
+      pr "extern void guestfs_free_%s_list (struct guestfs_%s_list *);\n" typ typ;
+      pr "\n"
+  ) structs
 
 (* Generate the guestfs-actions.h file. *)
 and generate_actions_h () =
@@ -3740,11 +3679,8 @@ check_state (guestfs_h *g, const char *caller)
 	   failwithf "RConstString cannot be returned from a daemon function"
        | RInt _ | RInt64 _
        | RBool _ | RString _ | RStringList _
-       | RIntBool _
-       | RPVList _ | RVGList _ | RLVList _
-       | RStat _ | RStatVFS _
-       | RHashtable _
-       | RDirentList _ ->
+       | RStruct _ | RStructList _
+       | RHashtable _ ->
 	   pr "  struct %s_ret ret;\n" name
       );
       pr "};\n";
@@ -3784,15 +3720,12 @@ check_state (guestfs_h *g, const char *caller)
 	   failwithf "RConstString cannot be returned from a daemon function"
        | RInt _ | RInt64 _
        | RBool _ | RString _ | RStringList _
-       | RIntBool _
-       | RPVList _ | RVGList _ | RLVList _
-       | RStat _ | RStatVFS _
-       | RHashtable _
-       | RDirentList _ ->
-	    pr "  if (!xdr_%s_ret (xdr, &ctx->ret)) {\n" name;
-	    pr "    error (g, \"%%s: failed to parse reply\", \"%s\");\n" name;
-	    pr "    return;\n";
-	    pr "  }\n";
+       | RStruct _ | RStructList _
+       | RHashtable _ ->
+	   pr "  if (!xdr_%s_ret (xdr, &ctx->ret)) {\n" name;
+	   pr "    error (g, \"%%s: failed to parse reply\", \"%s\");\n" name;
+	   pr "    return;\n";
+	   pr "  }\n";
       );
 
       pr " done:\n";
@@ -3808,11 +3741,9 @@ check_state (guestfs_h *g, const char *caller)
 	| RErr | RInt _ | RInt64 _ | RBool _ -> "-1"
 	| RConstString _ ->
 	    failwithf "RConstString cannot be returned from a daemon function"
-	| RString _ | RStringList _ | RIntBool _
-	| RPVList _ | RVGList _ | RLVList _
-	| RStat _ | RStatVFS _
-	| RHashtable _
-	| RDirentList _ ->
+	| RString _ | RStringList _
+	| RStruct _ | RStructList _
+	| RHashtable _ ->
 	    "NULL" in
 
       pr "{\n";
@@ -3944,18 +3875,43 @@ check_state (guestfs_h *g, const char *caller)
 	     n n;
 	   pr "  ctx.ret.%s.%s_val[ctx.ret.%s.%s_len] = NULL;\n" n n n n;
 	   pr "  return ctx.ret.%s.%s_val;\n" n n
-       | RIntBool _ ->
-	   pr "  /* caller with free this */\n";
-	   pr "  return safe_memdup (g, &ctx.ret, sizeof (ctx.ret));\n"
-       | RPVList n | RVGList n | RLVList n
-       | RStat n | RStatVFS n
-       | RDirentList n ->
+       | RStruct (n, _) ->
+	   pr "  /* caller will free this */\n";
+	   pr "  return safe_memdup (g, &ctx.ret.%s, sizeof (ctx.ret.%s));\n" n n
+       | RStructList (n, _) ->
 	   pr "  /* caller will free this */\n";
 	   pr "  return safe_memdup (g, &ctx.ret.%s, sizeof (ctx.ret.%s));\n" n n
       );
 
       pr "}\n\n"
-  ) daemon_functions
+  ) daemon_functions;
+
+  (* Functions to free structures. *)
+  pr "/* Structure-freeing functions.  These rely on the fact that the\n";
+  pr " * structure format is identical to the XDR format.  See note in\n";
+  pr " * generator.ml.\n";
+  pr " */\n";
+  pr "\n";
+
+  List.iter (
+    fun (typ, _) ->
+      pr "void\n";
+      pr "guestfs_free_%s (struct guestfs_%s *x)\n" typ typ;
+      pr "{\n";
+      pr "  xdr_free ((xdrproc_t) xdr_guestfs_int_%s, (char *) x);\n" typ;
+      pr "  free (x);\n";
+      pr "}\n";
+      pr "\n";
+
+      pr "void\n";
+      pr "guestfs_free_%s_list (struct guestfs_%s_list *x)\n" typ typ;
+      pr "{\n";
+      pr "  xdr_free ((xdrproc_t) xdr_guestfs_int_%s_list, (char *) x);\n" typ;
+      pr "  free (x);\n";
+      pr "}\n";
+      pr "\n";
+
+  ) structs;
 
 (* Generate daemon/actions.h. *)
 and generate_daemon_actions_h () =
@@ -3966,9 +3922,9 @@ and generate_daemon_actions_h () =
 
   List.iter (
     fun (name, style, _, _, _, _, _) ->
-	generate_prototype
-	  ~single_line:true ~newline:true ~in_daemon:true ~prefix:"do_"
-	  name style;
+      generate_prototype
+	~single_line:true ~newline:true ~in_daemon:true ~prefix:"do_"
+	name style;
   ) daemon_functions
 
 (* Generate the server-side stubs. *)
@@ -4004,13 +3960,8 @@ and generate_daemon_actions () =
 	    failwithf "RConstString cannot be returned from a daemon function"
 	| RString _ -> pr "  char *r;\n"; "NULL"
 	| RStringList _ | RHashtable _ -> pr "  char **r;\n"; "NULL"
-	| RIntBool _ -> pr "  guestfs_%s_ret *r;\n" name; "NULL"
-	| RPVList _ -> pr "  guestfs_lvm_int_pv_list *r;\n"; "NULL"
-	| RVGList _ -> pr "  guestfs_lvm_int_vg_list *r;\n"; "NULL"
-	| RLVList _ -> pr "  guestfs_lvm_int_lv_list *r;\n"; "NULL"
-	| RStat _ -> pr "  guestfs_int_stat *r;\n"; "NULL"
-	| RStatVFS _ -> pr "  guestfs_int_statvfs *r;\n"; "NULL"
-	| RDirentList _ -> pr "  guestfs_int_dirent_list *r;\n"; "NULL" in
+	| RStruct (_, typ) -> pr "  guestfs_int_%s *r;\n" typ; "NULL"
+	| RStructList (_, typ) -> pr "  guestfs_int_%s_list *r;\n" typ; "NULL" in
 
       (match snd style with
        | [] -> ()
@@ -4106,13 +4057,14 @@ and generate_daemon_actions () =
 	    pr "  reply ((xdrproc_t) &xdr_guestfs_%s_ret, (char *) &ret);\n"
 	      name;
 	    pr "  free_strings (r);\n"
-	| RIntBool _ ->
-	    pr "  reply ((xdrproc_t) xdr_guestfs_%s_ret, (char *) r);\n"
+	| RStruct (n, _) ->
+	    pr "  struct guestfs_%s_ret ret;\n" name;
+	    pr "  ret.%s = *r;\n" n;
+	    pr "  reply ((xdrproc_t) xdr_guestfs_%s_ret, (char *) &ret);\n"
 	      name;
-	    pr "  xdr_free ((xdrproc_t) xdr_guestfs_%s_ret, (char *) r);\n" name
-	| RPVList n | RVGList n | RLVList n
-	| RStat n | RStatVFS n
-	| RDirentList n ->
+	    pr "  xdr_free ((xdrproc_t) xdr_guestfs_%s_ret, (char *) &ret);\n"
+	      name
+	| RStructList (n, _) ->
 	    pr "  struct guestfs_%s_ret ret;\n" name;
 	    pr "  ret.%s = *r;\n" n;
 	    pr "  reply ((xdrproc_t) xdr_guestfs_%s_ret, (char *) &ret);\n"
@@ -4141,9 +4093,9 @@ and generate_daemon_actions () =
 
   List.iter (
     fun (name, style, _, _, _, _, _) ->
-	pr "    case GUESTFS_PROC_%s:\n" (String.uppercase name);
-	pr "      %s_stub (xdr_in);\n" name;
-	pr "      break;\n"
+      pr "    case GUESTFS_PROC_%s:\n" (String.uppercase name);
+      pr "      %s_stub (xdr_in);\n" name;
+      pr "      break;\n"
   ) daemon_functions;
 
   pr "    default:\n";
@@ -4163,14 +4115,14 @@ and generate_daemon_actions () =
 	  typ (String.concat "," (List.map fst cols));
 	pr "\n";
 
-	pr "static int lvm_tokenize_%s (char *str, struct guestfs_lvm_int_%s *r)\n" typ typ;
+	pr "static int lvm_tokenize_%s (char *str, guestfs_int_lvm_%s *r)\n" typ typ;
 	pr "{\n";
 	pr "  char *tok, *p, *next;\n";
 	pr "  int i, j;\n";
 	pr "\n";
 	(*
-	pr "  fprintf (stderr, \"%%s: <<%%s>>\\n\", __func__, str);\n";
-	pr "\n";
+	  pr "  fprintf (stderr, \"%%s: <<%%s>>\\n\", __func__, str);\n";
+	  pr "\n";
 	*)
 	pr "  if (!str) {\n";
 	pr "    fprintf (stderr, \"%%s: failed: passed a NULL string\\n\", __func__);\n";
@@ -4191,13 +4143,13 @@ and generate_daemon_actions () =
 	    pr "  if (*p) next = p+1; else next = NULL;\n";
 	    pr "  *p = '\\0';\n";
 	    (match coltype with
-	     | `String ->
+	     | FString ->
 		 pr "  r->%s = strdup (tok);\n" name;
 		 pr "  if (r->%s == NULL) {\n" name;
 		 pr "    perror (\"strdup\");\n";
 		 pr "    return -1;\n";
 		 pr "  }\n"
-	     | `UUID ->
+	     | FUUID ->
 		 pr "  for (i = j = 0; i < 32; ++j) {\n";
 		 pr "    if (tok[j] == '\\0') {\n";
 		 pr "      fprintf (stderr, \"%%s: failed to parse UUID from '%%s'\\n\", __func__, tok);\n";
@@ -4205,23 +4157,25 @@ and generate_daemon_actions () =
 		 pr "    } else if (tok[j] != '-')\n";
 		 pr "      r->%s[i++] = tok[j];\n" name;
 		 pr "  }\n";
-	     | `Bytes ->
+	     | FBytes ->
 		 pr "  if (sscanf (tok, \"%%\"SCNu64, &r->%s) != 1) {\n" name;
 		 pr "    fprintf (stderr, \"%%s: failed to parse size '%%s' from token %%s\\n\", __func__, tok, \"%s\");\n" name;
 		 pr "    return -1;\n";
 		 pr "  }\n";
-	     | `Int ->
+	     | FInt64 ->
 		 pr "  if (sscanf (tok, \"%%\"SCNi64, &r->%s) != 1) {\n" name;
 		 pr "    fprintf (stderr, \"%%s: failed to parse int '%%s' from token %%s\\n\", __func__, tok, \"%s\");\n" name;
 		 pr "    return -1;\n";
 		 pr "  }\n";
-	     | `OptPercent ->
+	     | FOptPercent ->
 		 pr "  if (tok[0] == '\\0')\n";
 		 pr "    r->%s = -1;\n" name;
 		 pr "  else if (sscanf (tok, \"%%f\", &r->%s) != 1) {\n" name;
 		 pr "    fprintf (stderr, \"%%s: failed to parse float '%%s' from token %%s\\n\", __func__, tok, \"%s\");\n" name;
 		 pr "    return -1;\n";
 		 pr "  }\n";
+	     | FInt32 | FUInt32 | FUInt64 | FChar ->
+		 assert false (* can never be an LVM column *)
 	    );
 	    pr "  tok = next;\n";
 	) cols;
@@ -4234,13 +4188,13 @@ and generate_daemon_actions () =
 	pr "}\n";
 	pr "\n";
 
-	pr "guestfs_lvm_int_%s_list *\n" typ;
+	pr "guestfs_int_lvm_%s_list *\n" typ;
 	pr "parse_command_line_%ss (void)\n" typ;
 	pr "{\n";
 	pr "  char *out, *err;\n";
 	pr "  char *p, *pend;\n";
 	pr "  int r, i;\n";
-	pr "  guestfs_lvm_int_%s_list *ret;\n" typ;
+	pr "  guestfs_int_lvm_%s_list *ret;\n" typ;
 	pr "  void *newp;\n";
 	pr "\n";
 	pr "  ret = malloc (sizeof *ret);\n";
@@ -4249,8 +4203,8 @@ and generate_daemon_actions () =
 	pr "    return NULL;\n";
 	pr "  }\n";
 	pr "\n";
-	pr "  ret->guestfs_lvm_int_%s_list_len = 0;\n" typ;
-	pr "  ret->guestfs_lvm_int_%s_list_val = NULL;\n" typ;
+	pr "  ret->guestfs_int_lvm_%s_list_len = 0;\n" typ;
+	pr "  ret->guestfs_int_lvm_%s_list_val = NULL;\n" typ;
 	pr "\n";
 	pr "  r = command (&out, &err,\n";
 	pr "	       \"/sbin/lvm\", \"%ss\",\n" typ;
@@ -4285,22 +4239,22 @@ and generate_daemon_actions () =
 	pr "    }\n";
 	pr "\n";
 	pr "    /* Allocate some space to store this next entry. */\n";
-	pr "    newp = realloc (ret->guestfs_lvm_int_%s_list_val,\n" typ;
-	pr "		    sizeof (guestfs_lvm_int_%s) * (i+1));\n" typ;
+	pr "    newp = realloc (ret->guestfs_int_lvm_%s_list_val,\n" typ;
+	pr "		    sizeof (guestfs_int_lvm_%s) * (i+1));\n" typ;
 	pr "    if (newp == NULL) {\n";
 	pr "      reply_with_perror (\"realloc\");\n";
-	pr "      free (ret->guestfs_lvm_int_%s_list_val);\n" typ;
+	pr "      free (ret->guestfs_int_lvm_%s_list_val);\n" typ;
 	pr "      free (ret);\n";
 	pr "      free (out);\n";
 	pr "      return NULL;\n";
 	pr "    }\n";
-	pr "    ret->guestfs_lvm_int_%s_list_val = newp;\n" typ;
+	pr "    ret->guestfs_int_lvm_%s_list_val = newp;\n" typ;
 	pr "\n";
 	pr "    /* Tokenize the next entry. */\n";
-	pr "    r = lvm_tokenize_%s (p, &ret->guestfs_lvm_int_%s_list_val[i]);\n" typ typ;
+	pr "    r = lvm_tokenize_%s (p, &ret->guestfs_int_lvm_%s_list_val[i]);\n" typ typ;
 	pr "    if (r == -1) {\n";
 	pr "      reply_with_error (\"failed to parse output of '%ss' command\");\n" typ;
-        pr "      free (ret->guestfs_lvm_int_%s_list_val);\n" typ;
+        pr "      free (ret->guestfs_int_lvm_%s_list_val);\n" typ;
         pr "      free (ret);\n";
 	pr "      free (out);\n";
 	pr "      return NULL;\n";
@@ -4310,13 +4264,13 @@ and generate_daemon_actions () =
 	pr "    p = pend;\n";
 	pr "  }\n";
 	pr "\n";
-	pr "  ret->guestfs_lvm_int_%s_list_len = i;\n" typ;
+	pr "  ret->guestfs_int_lvm_%s_list_len = i;\n" typ;
 	pr "\n";
 	pr "  free (out);\n";
 	pr "  return ret;\n";
 	pr "}\n"
 
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols]
+  ) ["pv", lvm_pv_cols; "vg", lvm_vg_cols; "lv", lvm_lv_cols]
 
 (* Generate a list of function names, for debugging in the daemon.. *)
 and generate_daemon_names () =
@@ -4641,7 +4595,7 @@ and generate_one_test_body name i test_name init test =
 	 [["blockdev_setrw"; "/dev/sda"];
 	  ["umount_all"];
 	  ["lvm_remove_all"];
-	  ["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+	  ["sfdiskM"; "/dev/sda"; ","];
 	  ["mkfs"; "ext2"; "/dev/sda1"];
 	  ["mount"; "/dev/sda1"; "/"]]
    | InitBasicFSonLVM ->
@@ -4651,7 +4605,7 @@ and generate_one_test_body name i test_name init test =
 	 [["blockdev_setrw"; "/dev/sda"];
 	  ["umount_all"];
 	  ["lvm_remove_all"];
-	  ["sfdisk"; "/dev/sda"; "0"; "0"; "0"; ","];
+	  ["sfdiskM"; "/dev/sda"; ","];
 	  ["pvcreate"; "/dev/sda1"];
 	  ["vgcreate"; "VG"; "/dev/sda1"];
 	  ["lvcreate"; "LV"; "VG"; "8"];
@@ -4674,7 +4628,7 @@ and generate_one_test_body name i test_name init test =
       List.iter (generate_test_command_call test_name) seq
   | TestOutput (seq, expected) ->
       pr "  /* TestOutput for %s (%d) */\n" name i;
-      pr "  char expected[] = \"%s\";\n" (c_quote expected);
+      pr "  const char *expected = \"%s\";\n" (c_quote expected);
       let seq, last = get_seq_last seq in
       let test () =
 	pr "    if (strcmp (r, expected) != 0) {\n";
@@ -4696,7 +4650,7 @@ and generate_one_test_body name i test_name init test =
 	    pr "      return -1;\n";
 	    pr "    }\n";
             pr "    {\n";
-            pr "      char expected[] = \"%s\";\n" (c_quote str);
+            pr "      const char *expected = \"%s\";\n" (c_quote str);
 	    pr "      if (strcmp (r[%d], expected) != 0) {\n" i;
 	    pr "        fprintf (stderr, \"%s: expected \\\"%%s\\\" but got \\\"%%s\\\"\\n\", expected, r[%d]);\n" test_name i;
 	    pr "        return -1;\n";
@@ -4724,7 +4678,7 @@ and generate_one_test_body name i test_name init test =
 	    pr "      return -1;\n";
 	    pr "    }\n";
             pr "    {\n";
-            pr "      char expected[] = \"%s\";\n" (c_quote str);
+            pr "      const char *expected = \"%s\";\n" (c_quote str);
 	    pr "      r[%d][5] = 's';\n" i;
 	    pr "      if (strcmp (r[%d], expected) != 0) {\n" i;
 	    pr "        fprintf (stderr, \"%s: expected \\\"%%s\\\" but got \\\"%%s\\\"\\n\", expected, r[%d]);\n" test_name i;
@@ -4870,7 +4824,7 @@ and generate_test_command_call ?(expect_error = false) ?test test_name cmd =
 	| OptString n, "NULL" -> ()
 	| String n, arg
 	| OptString n, arg ->
-	    pr "    char %s[] = \"%s\";\n" n (c_quote arg);
+	    pr "    const char *%s = \"%s\";\n" n (c_quote arg);
 	| Int _, _
 	| Bool _, _
 	| FileIn _, _ | FileOut _, _ -> ()
@@ -4878,9 +4832,9 @@ and generate_test_command_call ?(expect_error = false) ?test test_name cmd =
 	    let strs = string_split " " arg in
 	    iteri (
 	      fun i str ->
-                pr "    char %s_%d[] = \"%s\";\n" n i (c_quote str);
+                pr "    const char *%s_%d = \"%s\";\n" n i (c_quote str);
 	    ) strs;
-	    pr "    char *%s[] = {\n" n;
+	    pr "    const char *%s[] = {\n" n;
 	    iteri (
 	      fun i _ -> pr "      %s_%d,\n" n i
 	    ) strs;
@@ -4898,20 +4852,10 @@ and generate_test_command_call ?(expect_error = false) ?test test_name cmd =
 	    pr "    char **r;\n";
 	    pr "    int i;\n";
 	    "NULL"
-	| RIntBool _ ->
-	    pr "    struct guestfs_int_bool *r;\n"; "NULL"
-	| RPVList _ ->
-	    pr "    struct guestfs_lvm_pv_list *r;\n"; "NULL"
-	| RVGList _ ->
-	    pr "    struct guestfs_lvm_vg_list *r;\n"; "NULL"
-	| RLVList _ ->
-	    pr "    struct guestfs_lvm_lv_list *r;\n"; "NULL"
-	| RStat _ ->
-	    pr "    struct guestfs_stat *r;\n"; "NULL"
-	| RStatVFS _ ->
-	    pr "    struct guestfs_statvfs *r;\n"; "NULL"
-	| RDirentList _ ->
-	    pr "    struct guestfs_dirent_list *r;\n"; "NULL" in
+	| RStruct (_, typ) ->
+	    pr "    struct guestfs_%s *r;\n" typ; "NULL"
+	| RStructList (_, typ) ->
+	    pr "    struct guestfs_%s_list *r;\n" typ; "NULL" in
 
       pr "    suppress_error = %d;\n" (if expect_error then 1 else 0);
       pr "    r = guestfs_%s (g" name;
@@ -4957,18 +4901,10 @@ and generate_test_command_call ?(expect_error = false) ?test test_name cmd =
 	   pr "    for (i = 0; r[i] != NULL; ++i)\n";
 	   pr "      free (r[i]);\n";
 	   pr "    free (r);\n"
-       | RIntBool _ ->
-	   pr "    guestfs_free_int_bool (r);\n"
-       | RPVList _ ->
-	   pr "    guestfs_free_lvm_pv_list (r);\n"
-       | RVGList _ ->
-	   pr "    guestfs_free_lvm_vg_list (r);\n"
-       | RLVList _ ->
-	   pr "    guestfs_free_lvm_lv_list (r);\n"
-       | RStat _ | RStatVFS _ ->
-	   pr "    free (r);\n"
-       | RDirentList _ ->
-	   pr "    guestfs_free_dirent_list (r);\n"
+       | RStruct (_, typ) ->
+	   pr "    guestfs_free_%s (r);\n" typ
+       | RStructList (_, typ) ->
+	   pr "    guestfs_free_%s_list (r);\n" typ
       );
 
       pr "  }\n"
@@ -5070,82 +5006,54 @@ and generate_fish_cmds () =
   pr "}\n";
   pr "\n";
 
-  (* print_{pv,vg,lv}_list functions *)
+  (* print_* functions *)
   List.iter (
-    function
-    | typ, cols ->
-	pr "static void print_%s (struct guestfs_lvm_%s *%s)\n" typ typ typ;
-	pr "{\n";
-	pr "  int i;\n";
-	pr "\n";
-	List.iter (
-	  function
-	  | name, `String ->
-	      pr "  printf (\"%s: %%s\\n\", %s->%s);\n" name typ name
-	  | name, `UUID ->
-	      pr "  printf (\"%s: \");\n" name;
-	      pr "  for (i = 0; i < 32; ++i)\n";
-	      pr "    printf (\"%%c\", %s->%s[i]);\n" typ name;
-	      pr "  printf (\"\\n\");\n"
-	  | name, `Bytes ->
-	      pr "  printf (\"%s: %%\" PRIu64 \"\\n\", %s->%s);\n" name typ name
-	  | name, `Int ->
-	      pr "  printf (\"%s: %%\" PRIi64 \"\\n\", %s->%s);\n" name typ name
-	  | name, `OptPercent ->
-	      pr "  if (%s->%s >= 0) printf (\"%s: %%g %%%%\\n\", %s->%s);\n"
-		typ name name typ name;
-	      pr "  else printf (\"%s: \\n\");\n" name
-	) cols;
-	pr "}\n";
-	pr "\n";
-	pr "static void print_%s_list (struct guestfs_lvm_%s_list *%ss)\n"
-	  typ typ typ;
-	pr "{\n";
-	pr "  int i;\n";
-	pr "\n";
-	pr "  for (i = 0; i < %ss->len; ++i)\n" typ;
-	pr "    print_%s (&%ss->val[i]);\n" typ typ;
-	pr "}\n";
-	pr "\n";
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols];
-
-  (* print_{stat,statvfs} functions *)
-  List.iter (
-    function
-    | typ, cols ->
-	pr "static void print_%s (struct guestfs_%s *%s)\n" typ typ typ;
-	pr "{\n";
-	List.iter (
-	  function
-	  | name, `Int ->
-	      pr "  printf (\"%s: %%\" PRIi64 \"\\n\", %s->%s);\n" name typ name
-	) cols;
-	pr "}\n";
-	pr "\n";
-  ) ["stat", stat_cols; "statvfs", statvfs_cols];
+    fun (typ, cols) ->
+      let needs_i =
+        List.exists (function (_, FUUID) -> true | _ -> false) cols in
 
-  (* print_dirent_list function *)
-  pr "static void print_dirent (struct guestfs_dirent *dirent)\n";
-  pr "{\n";
-  List.iter (
-    function
-    | name, `String ->
-	pr "  printf (\"%s: %%s\\n\", dirent->%s);\n" name name
-    | name, `Int ->
-	pr "  printf (\"%s: %%\" PRIi64 \"\\n\", dirent->%s);\n" name name
-    | name, `Char ->
-	pr "  printf (\"%s: %%c\\n\", dirent->%s);\n" name name
-  ) dirent_cols;
-  pr "}\n";
-  pr "\n";
-  pr "static void print_dirent_list (struct guestfs_dirent_list *dirents)\n";
-  pr "{\n";
-  pr "  int i;\n";
-  pr "\n";
-  pr "  for (i = 0; i < dirents->len; ++i)\n";
-  pr "    print_dirent (&dirents->val[i]);\n";
-  pr "}\n";
-  pr "\n";
+      pr "static void print_%s (struct guestfs_%s *%s)\n" typ typ typ;
+      pr "{\n";
+      if needs_i then (
+        pr "  int i;\n";
+        pr "\n"
+      );
+      List.iter (
+	function
+	| name, FString ->
+	    pr "  printf (\"%s: %%s\\n\", %s->%s);\n" name typ name
+	| name, FUUID ->
+	    pr "  printf (\"%s: \");\n" name;
+	    pr "  for (i = 0; i < 32; ++i)\n";
+	    pr "    printf (\"%%c\", %s->%s[i]);\n" typ name;
+	    pr "  printf (\"\\n\");\n"
+	| name, (FUInt64|FBytes) ->
+	    pr "  printf (\"%s: %%\" PRIu64 \"\\n\", %s->%s);\n" name typ name
+	| name, FInt64 ->
+	    pr "  printf (\"%s: %%\" PRIi64 \"\\n\", %s->%s);\n" name typ name
+	| name, FUInt32 ->
+	    pr "  printf (\"%s: %%\" PRIu32 \"\\n\", %s->%s);\n" name typ name
+	| name, FInt32 ->
+	    pr "  printf (\"%s: %%\" PRIi32 \"\\n\", %s->%s);\n" name typ name
+	| name, FChar ->
+	    pr "  printf (\"%s: %%c\\n\", %s->%s);\n" name typ name
+	| name, FOptPercent ->
+	    pr "  if (%s->%s >= 0) printf (\"%s: %%g %%%%\\n\", %s->%s);\n"
+	      typ name name typ name;
+	    pr "  else printf (\"%s: \\n\");\n" name
+      ) cols;
+      pr "}\n";
+      pr "\n";
+      pr "static void print_%s_list (struct guestfs_%s_list *%ss)\n"
+	typ typ typ;
+      pr "{\n";
+      pr "  int i;\n";
+      pr "\n";
+      pr "  for (i = 0; i < %ss->len; ++i)\n" typ;
+      pr "    print_%s (&%ss->val[i]);\n" typ typ;
+      pr "}\n";
+      pr "\n";
+  ) structs;
 
   (* run_<action> actions *)
   List.iter (
@@ -5160,13 +5068,8 @@ and generate_fish_cmds () =
        | RConstString _ -> pr "  const char *r;\n"
        | RString _ -> pr "  char *r;\n"
        | RStringList _ | RHashtable _ -> pr "  char **r;\n"
-       | RIntBool _ -> pr "  struct guestfs_int_bool *r;\n"
-       | RPVList _ -> pr "  struct guestfs_lvm_pv_list *r;\n"
-       | RVGList _ -> pr "  struct guestfs_lvm_vg_list *r;\n"
-       | RLVList _ -> pr "  struct guestfs_lvm_lv_list *r;\n"
-       | RStat _ -> pr "  struct guestfs_stat *r;\n"
-       | RStatVFS _ -> pr "  struct guestfs_statvfs *r;\n"
-       | RDirentList _ -> pr "  struct guestfs_dirent_list *r;\n"
+       | RStruct (_, typ) -> pr "  struct guestfs_%s *r;\n" typ
+       | RStructList (_, typ) -> pr "  struct guestfs_%s_list *r;\n" typ
       );
       List.iter (
 	function
@@ -5245,47 +5148,21 @@ and generate_fish_cmds () =
 	   pr "  print_strings (r);\n";
 	   pr "  free_strings (r);\n";
 	   pr "  return 0;\n"
-       | RIntBool _ ->
+       | RStruct (_, typ) ->
 	   pr "  if (r == NULL) return -1;\n";
-	   pr "  printf (\"%%d, %%s\\n\", r->i,\n";
-	   pr "    r->b ? \"true\" : \"false\");\n";
-	   pr "  guestfs_free_int_bool (r);\n";
+	   pr "  print_%s (r);\n" typ;
+	   pr "  guestfs_free_%s (r);\n" typ;
 	   pr "  return 0;\n"
-       | RPVList _ ->
+       | RStructList (_, typ) ->
 	   pr "  if (r == NULL) return -1;\n";
-	   pr "  print_pv_list (r);\n";
-	   pr "  guestfs_free_lvm_pv_list (r);\n";
-	   pr "  return 0;\n"
-       | RVGList _ ->
-	   pr "  if (r == NULL) return -1;\n";
-	   pr "  print_vg_list (r);\n";
-	   pr "  guestfs_free_lvm_vg_list (r);\n";
-	   pr "  return 0;\n"
-       | RLVList _ ->
-	   pr "  if (r == NULL) return -1;\n";
-	   pr "  print_lv_list (r);\n";
-	   pr "  guestfs_free_lvm_lv_list (r);\n";
-	   pr "  return 0;\n"
-       | RStat _ ->
-	   pr "  if (r == NULL) return -1;\n";
-	   pr "  print_stat (r);\n";
-	   pr "  free (r);\n";
-	   pr "  return 0;\n"
-       | RStatVFS _ ->
-	   pr "  if (r == NULL) return -1;\n";
-	   pr "  print_statvfs (r);\n";
-	   pr "  free (r);\n";
+	   pr "  print_%s_list (r);\n" typ;
+	   pr "  guestfs_free_%s_list (r);\n" typ;
 	   pr "  return 0;\n"
        | RHashtable _ ->
 	   pr "  if (r == NULL) return -1;\n";
 	   pr "  print_table (r);\n";
 	   pr "  free_strings (r);\n";
 	   pr "  return 0;\n"
-       | RDirentList _ ->
-	   pr "  if (r == NULL) return -1;\n";
-	   pr "  print_dirent_list (r);\n";
-	   pr "  guestfs_free_dirent_list (r);\n";
-	   pr "  return 0;\n"
       );
       pr "}\n";
       pr "\n"
@@ -5478,27 +5355,12 @@ and generate_prototype ?(extern = true) ?(static = false) ?(semicolon = true)
    | RConstString _ -> pr "const char *"
    | RString _ -> pr "char *"
    | RStringList _ | RHashtable _ -> pr "char **"
-   | RIntBool _ ->
-       if not in_daemon then pr "struct guestfs_int_bool *"
-       else pr "guestfs_%s_ret *" name
-   | RPVList _ ->
-       if not in_daemon then pr "struct guestfs_lvm_pv_list *"
-       else pr "guestfs_lvm_int_pv_list *"
-   | RVGList _ ->
-       if not in_daemon then pr "struct guestfs_lvm_vg_list *"
-       else pr "guestfs_lvm_int_vg_list *"
-   | RLVList _ ->
-       if not in_daemon then pr "struct guestfs_lvm_lv_list *"
-       else pr "guestfs_lvm_int_lv_list *"
-   | RStat _ ->
-       if not in_daemon then pr "struct guestfs_stat *"
-       else pr "guestfs_int_stat *"
-   | RStatVFS _ ->
-       if not in_daemon then pr "struct guestfs_statvfs *"
-       else pr "guestfs_int_statvfs *"
-   | RDirentList _ ->
-       if not in_daemon then pr "struct guestfs_dirent_list *"
-       else pr "guestfs_int_dirent_list *"
+   | RStruct (_, typ) ->
+       if not in_daemon then pr "struct guestfs_%s *" typ
+       else pr "guestfs_int_%s *" typ
+   | RStructList (_, typ) ->
+       if not in_daemon then pr "struct guestfs_%s_list *" typ
+       else pr "guestfs_int_%s_list *" typ
   );
   pr "%s%s (" prefix name;
   if handle = None && List.length (snd style) = 0 then
@@ -5576,11 +5438,7 @@ val close : t -> unit
     provide predictable cleanup. *)
 
 ";
-  generate_ocaml_lvm_structure_decls ();
-
-  generate_ocaml_stat_structure_decls ();
-
-  generate_ocaml_dirent_structure_decls ();
+  generate_ocaml_structure_decls ();
 
   (* The actions. *)
   List.iter (
@@ -5605,11 +5463,7 @@ let () =
 
 ";
 
-  generate_ocaml_lvm_structure_decls ();
-
-  generate_ocaml_stat_structure_decls ();
-
-  generate_ocaml_dirent_structure_decls ();
+  generate_ocaml_structure_decls ();
 
   (* The actions. *)
   List.iter (
@@ -5667,14 +5521,14 @@ copy_table (char * const * argv)
 
 ";
 
-  (* LVM struct copy functions. *)
+  (* Struct copy functions. *)
   List.iter (
     fun (typ, cols) ->
       let has_optpercent_col =
-	List.exists (function (_, `OptPercent) -> true | _ -> false) cols in
+	List.exists (function (_, FOptPercent) -> true | _ -> false) cols in
 
       pr "static CAMLprim value\n";
-      pr "copy_lvm_%s (const struct guestfs_lvm_%s *%s)\n" typ typ typ;
+      pr "copy_%s (const struct guestfs_%s *%s)\n" typ typ typ;
       pr "{\n";
       pr "  CAMLparam0 ();\n";
       if has_optpercent_col then
@@ -5686,21 +5540,24 @@ copy_table (char * const * argv)
       iteri (
 	fun i col ->
 	  (match col with
-	   | name, `String ->
+	   | name, FString ->
 	       pr "  v = caml_copy_string (%s->%s);\n" typ name
-	   | name, `UUID ->
+	   | name, FUUID ->
 	       pr "  v = caml_alloc_string (32);\n";
 	       pr "  memcpy (String_val (v), %s->%s, 32);\n" typ name
-	   | name, `Bytes
-	   | name, `Int ->
+	   | name, (FBytes|FInt64|FUInt64) ->
 	       pr "  v = caml_copy_int64 (%s->%s);\n" typ name
-	   | name, `OptPercent ->
+	   | name, (FInt32|FUInt32) ->
+	       pr "  v = caml_copy_int32 (%s->%s);\n" typ name
+	   | name, FOptPercent ->
 	       pr "  if (%s->%s >= 0) { /* Some %s */\n" typ name name;
 	       pr "    v2 = caml_copy_double (%s->%s);\n" typ name;
 	       pr "    v = caml_alloc (1, 0);\n";
 	       pr "    Store_field (v, 0, v2);\n";
 	       pr "  } else /* None */\n";
 	       pr "    v = Val_int (0);\n";
+	   | name, FChar ->
+	       pr "  v = Val_int (%s->%s);\n" typ name
 	  );
 	  pr "  Store_field (rv, %d, v);\n" i
       ) cols;
@@ -5709,7 +5566,7 @@ copy_table (char * const * argv)
       pr "\n";
 
       pr "static CAMLprim value\n";
-      pr "copy_lvm_%s_list (const struct guestfs_lvm_%s_list *%ss)\n"
+      pr "copy_%s_list (const struct guestfs_%s_list *%ss)\n"
 	typ typ typ;
       pr "{\n";
       pr "  CAMLparam0 ();\n";
@@ -5721,81 +5578,14 @@ copy_table (char * const * argv)
       pr "  else {\n";
       pr "    rv = caml_alloc (%ss->len, 0);\n" typ;
       pr "    for (i = 0; i < %ss->len; ++i) {\n" typ;
-      pr "      v = copy_lvm_%s (&%ss->val[i]);\n" typ typ;
+      pr "      v = copy_%s (&%ss->val[i]);\n" typ typ;
       pr "      caml_modify (&Field (rv, i), v);\n";
       pr "    }\n";
       pr "    CAMLreturn (rv);\n";
       pr "  }\n";
       pr "}\n";
       pr "\n";
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols];
-
-  (* Stat copy functions. *)
-  List.iter (
-    fun (typ, cols) ->
-      pr "static CAMLprim value\n";
-      pr "copy_%s (const struct guestfs_%s *%s)\n" typ typ typ;
-      pr "{\n";
-      pr "  CAMLparam0 ();\n";
-      pr "  CAMLlocal2 (rv, v);\n";
-      pr "\n";
-      pr "  rv = caml_alloc (%d, 0);\n" (List.length cols);
-      iteri (
-	fun i col ->
-	  (match col with
-	   | name, `Int ->
-	       pr "  v = caml_copy_int64 (%s->%s);\n" typ name
-	  );
-	  pr "  Store_field (rv, %d, v);\n" i
-      ) cols;
-      pr "  CAMLreturn (rv);\n";
-      pr "}\n";
-      pr "\n";
-  ) ["stat", stat_cols; "statvfs", statvfs_cols];
-
-  (* Dirent copy functions. *)
-  pr "static CAMLprim value\n";
-  pr "copy_dirent (const struct guestfs_dirent *dirent)\n";
-  pr "{\n";
-  pr "  CAMLparam0 ();\n";
-  pr "  CAMLlocal2 (rv, v);\n";
-  pr "\n";
-  pr "  rv = caml_alloc (%d, 0);\n" (List.length dirent_cols);
-  iteri (
-    fun i col ->
-      (match col with
-       | name, `String ->
-	   pr "  v = caml_copy_string (dirent->%s);\n" name
-       | name, `Int ->
-	   pr "  v = caml_copy_int64 (dirent->%s);\n" name
-       | name, `Char ->
-	   pr "  v = Val_int (dirent->%s);\n" name
-      );
-      pr "  Store_field (rv, %d, v);\n" i
-  ) dirent_cols;
-  pr "  CAMLreturn (rv);\n";
-  pr "}\n";
-  pr "\n";
-
-  pr "static CAMLprim value\n";
-  pr "copy_dirent_list (const struct guestfs_dirent_list *dirents)\n";
-  pr "{\n";
-  pr "  CAMLparam0 ();\n";
-  pr "  CAMLlocal2 (rv, v);\n";
-  pr "  int i;\n";
-  pr "\n";
-  pr "  if (dirents->len == 0)\n";
-  pr "    CAMLreturn (Atom (0));\n";
-  pr "  else {\n";
-  pr "    rv = caml_alloc (dirents->len, 0);\n";
-  pr "    for (i = 0; i < dirents->len; ++i) {\n";
-  pr "      v = copy_dirent (&dirents->val[i]);\n";
-  pr "      caml_modify (&Field (rv, i), v);\n";
-  pr "    }\n";
-  pr "    CAMLreturn (rv);\n";
-  pr "  }\n";
-  pr "}\n";
-  pr "\n";
+  ) structs;
 
   (* The wrappers. *)
   List.iter (
@@ -5856,24 +5646,14 @@ copy_table (char * const * argv)
 	    pr "  int i;\n";
 	    pr "  char **r;\n";
 	    "NULL"
-	| RIntBool _ ->
-	    pr "  struct guestfs_int_bool *r;\n"; "NULL"
-	| RPVList _ ->
-	    pr "  struct guestfs_lvm_pv_list *r;\n"; "NULL"
-	| RVGList _ ->
-	    pr "  struct guestfs_lvm_vg_list *r;\n"; "NULL"
-	| RLVList _ ->
-	    pr "  struct guestfs_lvm_lv_list *r;\n"; "NULL"
-	| RStat _ ->
-	    pr "  struct guestfs_stat *r;\n"; "NULL"
-	| RStatVFS _ ->
-	    pr "  struct guestfs_statvfs *r;\n"; "NULL"
+	| RStruct (_, typ) ->
+	    pr "  struct guestfs_%s *r;\n" typ; "NULL"
+	| RStructList (_, typ) ->
+	    pr "  struct guestfs_%s_list *r;\n" typ; "NULL"
 	| RHashtable _ ->
 	    pr "  int i;\n";
 	    pr "  char **r;\n";
-	    "NULL"
-	| RDirentList _ ->
-	    pr "  struct guestfs_dirent_list *r;\n"; "NULL" in
+	    "NULL" in
       pr "\n";
 
       pr "  caml_enter_blocking_section ();\n";
@@ -5907,33 +5687,16 @@ copy_table (char * const * argv)
 	   pr "  rv = caml_copy_string_array ((const char **) r);\n";
 	   pr "  for (i = 0; r[i] != NULL; ++i) free (r[i]);\n";
 	   pr "  free (r);\n"
-       | RIntBool _ ->
-	   pr "  rv = caml_alloc (2, 0);\n";
-	   pr "  Store_field (rv, 0, Val_int (r->i));\n";
-	   pr "  Store_field (rv, 1, Val_bool (r->b));\n";
-	   pr "  guestfs_free_int_bool (r);\n";
-       | RPVList _ ->
-	   pr "  rv = copy_lvm_pv_list (r);\n";
-	   pr "  guestfs_free_lvm_pv_list (r);\n";
-       | RVGList _ ->
-	   pr "  rv = copy_lvm_vg_list (r);\n";
-	   pr "  guestfs_free_lvm_vg_list (r);\n";
-       | RLVList _ ->
-	   pr "  rv = copy_lvm_lv_list (r);\n";
-	   pr "  guestfs_free_lvm_lv_list (r);\n";
-       | RStat _ ->
-	   pr "  rv = copy_stat (r);\n";
-	   pr "  free (r);\n";
-       | RStatVFS _ ->
-	   pr "  rv = copy_statvfs (r);\n";
-	   pr "  free (r);\n";
+       | RStruct (_, typ) ->
+	   pr "  rv = copy_%s (r);\n" typ;
+	   pr "  guestfs_free_%s (r);\n" typ;
+       | RStructList (_, typ) ->
+	   pr "  rv = copy_%s_list (r);\n" typ;
+	   pr "  guestfs_free_%s_list (r);\n" typ;
        | RHashtable _ ->
 	   pr "  rv = copy_table (r);\n";
 	   pr "  for (i = 0; r[i] != NULL; ++i) free (r[i]);\n";
 	   pr "  free (r);\n";
-       | RDirentList _ ->
-	   pr "  rv = copy_dirent_list (r);\n";
-	   pr "  guestfs_free_dirent_list (r);\n";
       );
 
       pr "  CAMLreturn (rv);\n";
@@ -5952,44 +5715,22 @@ copy_table (char * const * argv)
       )
   ) all_functions
 
-and generate_ocaml_lvm_structure_decls () =
-  List.iter (
-    fun (typ, cols) ->
-      pr "type lvm_%s = {\n" typ;
-      List.iter (
-	function
-	| name, `String -> pr "  %s : string;\n" name
-	| name, `UUID -> pr "  %s : string;\n" name
-	| name, `Bytes -> pr "  %s : int64;\n" name
-	| name, `Int -> pr "  %s : int64;\n" name
-	| name, `OptPercent -> pr "  %s : float option;\n" name
-      ) cols;
-      pr "}\n";
-      pr "\n"
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols]
-
-and generate_ocaml_stat_structure_decls () =
+and generate_ocaml_structure_decls () =
   List.iter (
     fun (typ, cols) ->
       pr "type %s = {\n" typ;
       List.iter (
 	function
-	| name, `Int -> pr "  %s : int64;\n" name
+	| name, FString -> pr "  %s : string;\n" name
+	| name, FUUID -> pr "  %s : string;\n" name
+	| name, (FBytes|FInt64|FUInt64) -> pr "  %s : int64;\n" name
+	| name, (FInt32|FUInt32) -> pr "  %s : int32;\n" name
+	| name, FChar -> pr "  %s : char;\n" name
+	| name, FOptPercent -> pr "  %s : float option;\n" name
       ) cols;
       pr "}\n";
       pr "\n"
-  ) ["stat", stat_cols; "statvfs", statvfs_cols]
-
-and generate_ocaml_dirent_structure_decls () =
-  pr "type dirent = {\n";
-  List.iter (
-    function
-    | name, `Int -> pr "  %s : int64;\n" name
-    | name, `Char -> pr "  %s : char;\n" name
-    | name, `String -> pr "  %s : string;\n" name
-  ) dirent_cols;
-  pr "}\n";
-  pr "\n"
+  ) structs
 
 and generate_ocaml_prototype ?(is_external = false) name style =
   if is_external then pr "external " else pr "val ";
@@ -6010,14 +5751,9 @@ and generate_ocaml_prototype ?(is_external = false) name style =
    | RConstString _ -> pr "string"
    | RString _ -> pr "string"
    | RStringList _ -> pr "string array"
-   | RIntBool _ -> pr "int * bool"
-   | RPVList _ -> pr "lvm_pv array"
-   | RVGList _ -> pr "lvm_vg array"
-   | RLVList _ -> pr "lvm_lv array"
-   | RStat _ -> pr "stat"
-   | RStatVFS _ -> pr "statvfs"
+   | RStruct (_, typ) -> pr "%s" typ
+   | RStructList (_, typ) -> pr "%s array" typ
    | RHashtable _ -> pr "(string * string) list"
-   | RDirentList _ -> pr "dirent array"
   );
   if is_external then (
     pr " = ";
@@ -6131,11 +5867,8 @@ DESTROY (g)
        | RConstString _ -> pr "SV *\n"
        | RString _ -> pr "SV *\n"
        | RStringList _
-       | RIntBool _
-       | RPVList _ | RVGList _ | RLVList _
-       | RStat _ | RStatVFS _
-       | RHashtable _
-       | RDirentList _ ->
+       | RStruct _ | RStructList _
+       | RHashtable _ ->
 	   pr "void\n" (* all lists returned implictly on the stack *)
       );
       (* Call and arguments. *)
@@ -6251,42 +5984,20 @@ DESTROY (g)
 	   pr "        free (%s[i]);\n" n;
 	   pr "      }\n";
 	   pr "      free (%s);\n" n;
-       | RIntBool _ ->
-	   pr "PREINIT:\n";
-	   pr "      struct guestfs_int_bool *r;\n";
-	   pr " PPCODE:\n";
-	   pr "      r = guestfs_%s " name;
-	   generate_call_args ~handle:"g" (snd style);
-	   pr ";\n";
-	   do_cleanups ();
-	   pr "      if (r == NULL)\n";
-	   pr "        croak (\"%s: %%s\", guestfs_last_error (g));\n" name;
-	   pr "      EXTEND (SP, 2);\n";
-	   pr "      PUSHs (sv_2mortal (newSViv (r->i)));\n";
-	   pr "      PUSHs (sv_2mortal (newSViv (r->b)));\n";
-	   pr "      guestfs_free_int_bool (r);\n";
-       | RPVList n ->
-	   generate_perl_lvm_code "pv" pv_cols name style n do_cleanups
-       | RVGList n ->
-	   generate_perl_lvm_code "vg" vg_cols name style n do_cleanups
-       | RLVList n ->
-	   generate_perl_lvm_code "lv" lv_cols name style n do_cleanups
-       | RStat n ->
-	   generate_perl_stat_code "stat" stat_cols name style n do_cleanups
-       | RStatVFS n ->
-	   generate_perl_stat_code
-	     "statvfs" statvfs_cols name style n do_cleanups
-       | RDirentList n ->
-	   generate_perl_dirent_code
-	     "dirent" dirent_cols name style n do_cleanups
+       | RStruct (n, typ) ->
+	   let cols = cols_of_struct typ in
+	   generate_perl_struct_code typ cols name style n do_cleanups
+       | RStructList (n, typ) ->
+	   let cols = cols_of_struct typ in
+	   generate_perl_struct_list_code typ cols name style n do_cleanups
       );
 
       pr "\n"
   ) all_functions
 
-and generate_perl_lvm_code typ cols name style n do_cleanups =
+and generate_perl_struct_list_code typ cols name style n do_cleanups =
   pr "PREINIT:\n";
-  pr "      struct guestfs_lvm_%s_list *%s;\n" typ n;
+  pr "      struct guestfs_%s_list *%s;\n" typ n;
   pr "      int i;\n";
   pr "      HV *hv;\n";
   pr " PPCODE:\n";
@@ -6301,27 +6012,33 @@ and generate_perl_lvm_code typ cols name style n do_cleanups =
   pr "        hv = newHV ();\n";
   List.iter (
     function
-    | name, `String ->
+    | name, FString ->
 	pr "        (void) hv_store (hv, \"%s\", %d, newSVpv (%s->val[i].%s, 0), 0);\n"
 	  name (String.length name) n name
-    | name, `UUID ->
+    | name, FUUID ->
 	pr "        (void) hv_store (hv, \"%s\", %d, newSVpv (%s->val[i].%s, 32), 0);\n"
 	  name (String.length name) n name
-    | name, `Bytes ->
+    | name, (FBytes|FUInt64) ->
 	pr "        (void) hv_store (hv, \"%s\", %d, my_newSVull (%s->val[i].%s), 0);\n"
 	  name (String.length name) n name
-    | name, `Int ->
+    | name, FInt64 ->
 	pr "        (void) hv_store (hv, \"%s\", %d, my_newSVll (%s->val[i].%s), 0);\n"
 	  name (String.length name) n name
-    | name, `OptPercent ->
+    | name, (FInt32|FUInt32) ->
+	pr "        (void) hv_store (hv, \"%s\", %d, newSVnv (%s->val[i].%s), 0);\n"
+	  name (String.length name) n name
+    | name, FChar ->
+	pr "        (void) hv_store (hv, \"%s\", %d, newSVpv (&%s->val[i].%s, 1), 0);\n"
+	  name (String.length name) n name
+    | name, FOptPercent ->
 	pr "        (void) hv_store (hv, \"%s\", %d, newSVnv (%s->val[i].%s), 0);\n"
 	  name (String.length name) n name
   ) cols;
   pr "        PUSHs (sv_2mortal (newRV ((SV *) hv)));\n";
   pr "      }\n";
-  pr "      guestfs_free_lvm_%s_list (%s);\n" typ n
+  pr "      guestfs_free_%s_list (%s);\n" typ n
 
-and generate_perl_stat_code typ cols name style n do_cleanups =
+and generate_perl_struct_code typ cols name style n do_cleanups =
   pr "PREINIT:\n";
   pr "      struct guestfs_%s *%s;\n" typ n;
   pr " PPCODE:\n";
@@ -6334,42 +6051,30 @@ and generate_perl_stat_code typ cols name style n do_cleanups =
   pr "      EXTEND (SP, %d);\n" (List.length cols);
   List.iter (
     function
-    | name, `Int ->
-	pr "      PUSHs (sv_2mortal (my_newSVll (%s->%s)));\n" n name
+    | name, FString ->
+	pr "      PUSHs (sv_2mortal (newSVpv (%s->%s, 0)));\n"
+	  n name
+    | name, FUUID ->
+	pr "      PUSHs (sv_2mortal (newSVpv (%s->%s, 32)));\n"
+	  n name
+    | name, (FBytes|FUInt64) ->
+	pr "      PUSHs (sv_2mortal (my_newSVull (%s->%s)));\n"
+	  n name
+    | name, FInt64 ->
+	pr "      PUSHs (sv_2mortal (my_newSVll (%s->%s)));\n"
+	  n name
+    | name, (FInt32|FUInt32) ->
+	pr "      PUSHs (sv_2mortal (newSVnv (%s->%s)));\n"
+	  n name
+    | name, FChar ->
+	pr "      PUSHs (sv_2mortal (newSVpv (&%s->%s, 1)));\n"
+	  n name
+    | name, FOptPercent ->
+	pr "      PUSHs (sv_2mortal (newSVnv (%s->%s)));\n"
+	  n name
   ) cols;
   pr "      free (%s);\n" n
 
-and generate_perl_dirent_code typ cols name style n do_cleanups =
-  pr "PREINIT:\n";
-  pr "      struct guestfs_%s_list *%s;\n" typ n;
-  pr "      int i;\n";
-  pr "      HV *hv;\n";
-  pr " PPCODE:\n";
-  pr "      %s = guestfs_%s " n name;
-  generate_call_args ~handle:"g" (snd style);
-  pr ";\n";
-  do_cleanups ();
-  pr "      if (%s == NULL)\n" n;
-  pr "        croak (\"%s: %%s\", guestfs_last_error (g));\n" name;
-  pr "      EXTEND (SP, %s->len);\n" n;
-  pr "      for (i = 0; i < %s->len; ++i) {\n" n;
-  pr "        hv = newHV ();\n";
-  List.iter (
-    function
-    | name, `String ->
-	pr "        (void) hv_store (hv, \"%s\", %d, newSVpv (%s->val[i].%s, 0), 0);\n"
-	  name (String.length name) n name
-    | name, `Int ->
-	pr "        (void) hv_store (hv, \"%s\", %d, my_newSVull (%s->val[i].%s), 0);\n"
-	  name (String.length name) n name
-    | name, `Char ->
-	pr "        (void) hv_store (hv, \"%s\", %d, newSVpv (&%s->val[i].%s, 1), 0);\n"
-	  name (String.length name) n name
-  ) cols;
-  pr "        PUSHs (newRV (sv_2mortal ((SV *) hv)));\n";
-  pr "      }\n";
-  pr "      guestfs_free_%s_list (%s);\n" typ n
-
 (* Generate Sys/Guestfs.pm. *)
 and generate_perl_pm () =
   generate_header HashStyle LGPLv2;
@@ -6384,7 +6089,7 @@ Sys::Guestfs - Perl bindings for libguestfs
 =head1 SYNOPSIS
 
  use Sys::Guestfs;
- 
+
  my $h = Sys::Guestfs->new ();
  $h->add_drive ('guest.img');
  $h->launch ();
@@ -6415,6 +6120,10 @@ Libguestfs provides ways to enumerate guest storage (eg. partitions,
 LVs, what filesystem is in each LV, etc.).  It can also run commands
 in the context of the guest.  Also you can access filesystems over FTP.
 
+See also L<Sys::Guestfs::Lib(3)> for a set of useful library
+functions for using libguestfs from Perl, including integration
+with libvirt.
+
 =head1 ERRORS
 
 All errors turn into calls to C<croak> (see L<Carp(3)>).
@@ -6486,7 +6195,10 @@ Please see the file COPYING.LIB for the full license.
 
 =head1 SEE ALSO
 
-L<guestfs(3)>, L<guestfish(1)>.
+L<guestfs(3)>,
+L<guestfish(1)>,
+L<http://libguestfs.org>,
+L<Sys::Guestfs::Lib(3)>.
 
 =cut
 "
@@ -6499,15 +6211,10 @@ and generate_perl_prototype name style =
    | RInt64 n
    | RConstString n
    | RString n -> pr "$%s = " n
-   | RIntBool (n, m) -> pr "($%s, $%s) = " n m
-   | RStringList n
-   | RPVList n
-   | RVGList n
-   | RLVList n
-   | RDirentList n -> pr "@%s = " n
-   | RStat n
-   | RStatVFS n
+   | RStruct (n,_)
    | RHashtable n -> pr "%%%s = " n
+   | RStringList n
+   | RStructList (n,_) -> pr "@%s = " n
   );
   pr "$h->%s (" name;
   let comma = ref false in
@@ -6664,34 +6371,42 @@ py_guestfs_close (PyObject *self, PyObject *args)
 
 ";
 
-  (* LVM structures, turned into Python dictionaries. *)
+  (* Structures, turned into Python dictionaries. *)
   List.iter (
     fun (typ, cols) ->
       pr "static PyObject *\n";
-      pr "put_lvm_%s (struct guestfs_lvm_%s *%s)\n" typ typ typ;
+      pr "put_%s (struct guestfs_%s *%s)\n" typ typ typ;
       pr "{\n";
       pr "  PyObject *dict;\n";
       pr "\n";
       pr "  dict = PyDict_New ();\n";
       List.iter (
 	function
-	| name, `String ->
+	| name, FString ->
 	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
 	    pr "                        PyString_FromString (%s->%s));\n"
 	      typ name
-	| name, `UUID ->
+	| name, FUUID ->
 	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
 	    pr "                        PyString_FromStringAndSize (%s->%s, 32));\n"
 	      typ name
-	| name, `Bytes ->
+	| name, (FBytes|FUInt64) ->
 	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
 	    pr "                        PyLong_FromUnsignedLongLong (%s->%s));\n"
 	      typ name
-	| name, `Int ->
+	| name, FInt64 ->
 	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
 	    pr "                        PyLong_FromLongLong (%s->%s));\n"
 	      typ name
-	| name, `OptPercent ->
+	| name, FUInt32 ->
+	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
+	    pr "                        PyLong_FromUnsignedLong (%s->%s));\n"
+	      typ name
+	| name, FInt32 ->
+	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
+	    pr "                        PyLong_FromLong (%s->%s));\n"
+	      typ name
+	| name, FOptPercent ->
 	    pr "  if (%s->%s >= 0)\n" typ name;
 	    pr "    PyDict_SetItemString (dict, \"%s\",\n" name;
 	    pr "                          PyFloat_FromDouble ((double) %s->%s));\n"
@@ -6700,81 +6415,27 @@ py_guestfs_close (PyObject *self, PyObject *args)
 	    pr "    Py_INCREF (Py_None);\n";
 	    pr "    PyDict_SetItemString (dict, \"%s\", Py_None);" name;
 	    pr "  }\n"
+	| name, FChar ->
+	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
+	    pr "                        PyString_FromStringAndSize (&dirent->%s, 1));\n" name
       ) cols;
       pr "  return dict;\n";
       pr "};\n";
       pr "\n";
 
       pr "static PyObject *\n";
-      pr "put_lvm_%s_list (struct guestfs_lvm_%s_list *%ss)\n" typ typ typ;
+      pr "put_%s_list (struct guestfs_%s_list *%ss)\n" typ typ typ;
       pr "{\n";
       pr "  PyObject *list;\n";
       pr "  int i;\n";
       pr "\n";
       pr "  list = PyList_New (%ss->len);\n" typ;
       pr "  for (i = 0; i < %ss->len; ++i)\n" typ;
-      pr "    PyList_SetItem (list, i, put_lvm_%s (&%ss->val[i]));\n" typ typ;
+      pr "    PyList_SetItem (list, i, put_%s (&%ss->val[i]));\n" typ typ;
       pr "  return list;\n";
       pr "};\n";
       pr "\n"
-  ) ["pv", pv_cols; "vg", vg_cols; "lv", lv_cols];
-
-  (* Stat structures, turned into Python dictionaries. *)
-  List.iter (
-    fun (typ, cols) ->
-      pr "static PyObject *\n";
-      pr "put_%s (struct guestfs_%s *%s)\n" typ typ typ;
-      pr "{\n";
-      pr "  PyObject *dict;\n";
-      pr "\n";
-      pr "  dict = PyDict_New ();\n";
-      List.iter (
-	function
-	| name, `Int ->
-	    pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
-	    pr "                        PyLong_FromLongLong (%s->%s));\n"
-	      typ name
-      ) cols;
-      pr "  return dict;\n";
-      pr "};\n";
-      pr "\n";
-  ) ["stat", stat_cols; "statvfs", statvfs_cols];
-
-  (* Dirent structures, turned into Python dictionaries. *)
-  pr "static PyObject *\n";
-  pr "put_dirent (struct guestfs_dirent *dirent)\n";
-  pr "{\n";
-  pr "  PyObject *dict;\n";
-  pr "\n";
-  pr "  dict = PyDict_New ();\n";
-  List.iter (
-    function
-    | name, `Int ->
-	pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
-	pr "                        PyLong_FromLongLong (dirent->%s));\n" name
-    | name, `Char ->
-	pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
-	pr "                        PyString_FromStringAndSize (&dirent->%s, 1));\n" name
-    | name, `String ->
-	pr "  PyDict_SetItemString (dict, \"%s\",\n" name;
-	pr "                        PyString_FromString (dirent->%s));\n" name
-  ) dirent_cols;
-  pr "  return dict;\n";
-  pr "};\n";
-  pr "\n";
-
-  pr "static PyObject *\n";
-  pr "put_dirent_list (struct guestfs_dirent_list *dirents)\n";
-  pr "{\n";
-  pr "  PyObject *list;\n";
-  pr "  int i;\n";
-  pr "\n";
-  pr "  list = PyList_New (dirents->len);\n";
-  pr "  for (i = 0; i < dirents->len; ++i)\n";
-  pr "    PyList_SetItem (list, i, put_dirent (&dirents->val[i]));\n";
-  pr "  return list;\n";
-  pr "};\n";
-  pr "\n";
+  ) structs;
 
   (* Python wrapper functions. *)
   List.iter (
@@ -6794,13 +6455,9 @@ py_guestfs_close (PyObject *self, PyObject *args)
 	| RConstString _ -> pr "  const char *r;\n"; "NULL"
 	| RString _ -> pr "  char *r;\n"; "NULL"
 	| RStringList _ | RHashtable _ -> pr "  char **r;\n"; "NULL"
-	| RIntBool _ -> pr "  struct guestfs_int_bool *r;\n"; "NULL"
-	| RPVList n -> pr "  struct guestfs_lvm_pv_list *r;\n"; "NULL"
-	| RVGList n -> pr "  struct guestfs_lvm_vg_list *r;\n"; "NULL"
-	| RLVList n -> pr "  struct guestfs_lvm_lv_list *r;\n"; "NULL"
-	| RStat n -> pr "  struct guestfs_stat *r;\n"; "NULL"
-	| RStatVFS n -> pr "  struct guestfs_statvfs *r;\n"; "NULL"
-	| RDirentList n -> pr "  struct guestfs_dirent_list *r;\n"; "NULL" in
+	| RStruct (_, typ) -> pr "  struct guestfs_%s *r;\n" typ; "NULL"
+	| RStructList (_, typ) ->
+	    pr "  struct guestfs_%s_list *r;\n" typ; "NULL" in
 
       List.iter (
 	function
@@ -6881,32 +6538,15 @@ py_guestfs_close (PyObject *self, PyObject *args)
        | RStringList _ ->
 	   pr "  py_r = put_string_list (r);\n";
 	   pr "  free_strings (r);\n"
-       | RIntBool _ ->
-	   pr "  py_r = PyTuple_New (2);\n";
-	   pr "  PyTuple_SetItem (py_r, 0, PyInt_FromLong ((long) r->i));\n";
-	   pr "  PyTuple_SetItem (py_r, 1, PyInt_FromLong ((long) r->b));\n";
-	   pr "  guestfs_free_int_bool (r);\n"
-       | RPVList n ->
-	   pr "  py_r = put_lvm_pv_list (r);\n";
-	   pr "  guestfs_free_lvm_pv_list (r);\n"
-       | RVGList n ->
-	   pr "  py_r = put_lvm_vg_list (r);\n";
-	   pr "  guestfs_free_lvm_vg_list (r);\n"
-       | RLVList n ->
-	   pr "  py_r = put_lvm_lv_list (r);\n";
-	   pr "  guestfs_free_lvm_lv_list (r);\n"
-       | RStat n ->
-	   pr "  py_r = put_stat (r);\n";
-	   pr "  free (r);\n"
-       | RStatVFS n ->
-	   pr "  py_r = put_statvfs (r);\n";
-	   pr "  free (r);\n"
+       | RStruct (_, typ) ->
+	   pr "  py_r = put_%s (r);\n" typ;
+	   pr "  guestfs_free_%s (r);\n" typ
+       | RStructList (_, typ) ->
+	   pr "  py_r = put_%s_list (r);\n" typ;
+	   pr "  guestfs_free_%s_list (r);\n" typ
        | RHashtable n ->
 	   pr "  py_r = put_table (r);\n";
 	   pr "  free_strings (r);\n"
-       | RDirentList n ->
-	   pr "  py_r = put_dirent_list (r);\n";
-	   pr "  guestfs_free_dirent_list (r);\n"
       );
 
       pr "  return py_r;\n";
@@ -7021,22 +6661,12 @@ class GuestFS:
 	  | RString _ -> doc
 	  | RStringList _ ->
 	      doc ^ "\n\nThis function returns a list of strings."
-	  | RIntBool _ ->
-	      doc ^ "\n\nThis function returns a tuple (int, bool).\n"
-	  | RPVList _ ->
-	      doc ^ "\n\nThis function returns a list of PVs.  Each PV is represented as a dictionary."
-	  | RVGList _ ->
-	      doc ^ "\n\nThis function returns a list of VGs.  Each VG is represented as a dictionary."
-	  | RLVList _ ->
-	      doc ^ "\n\nThis function returns a list of LVs.  Each LV is represented as a dictionary."
-	  | RStat _ ->
-	      doc ^ "\n\nThis function returns a dictionary, with keys matching the various fields in the stat structure."
-	  | RStatVFS _ ->
-	      doc ^ "\n\nThis function returns a dictionary, with keys matching the various fields in the statvfs structure."
+	  | RStruct (_, typ) ->
+	      doc ^ sprintf "\n\nThis function returns a dictionary, with keys matching the various fields in the guestfs_%s structure." typ
+	  | RStructList (_, typ) ->
+	      doc ^ sprintf "\n\nThis function returns a list of %ss.  Each %s is represented as a dictionary." typ typ
 	  | RHashtable _ ->
-	      doc ^ "\n\nThis function returns a dictionary."
-	  | RDirentList _ ->
-	      doc ^ "\n\nThis function returns a list of directory entries.  Each directory entry is represented as a dictionary." in
+	      doc ^ "\n\nThis function returns a dictionary." in
 	let doc =
 	  if List.mem ProtocolLimitWarning flags then
 	    doc ^ "\n\n" ^ protocol_limit_warning
@@ -7206,13 +6836,9 @@ static VALUE ruby_guestfs_close (VALUE gv)
 	| RConstString _ -> pr "  const char *r;\n"; "NULL"
 	| RString _ -> pr "  char *r;\n"; "NULL"
 	| RStringList _ | RHashtable _ -> pr "  char **r;\n"; "NULL"
-	| RIntBool _ -> pr "  struct guestfs_int_bool *r;\n"; "NULL"
-	| RPVList n -> pr "  struct guestfs_lvm_pv_list *r;\n"; "NULL"
-	| RVGList n -> pr "  struct guestfs_lvm_vg_list *r;\n"; "NULL"
-	| RLVList n -> pr "  struct guestfs_lvm_lv_list *r;\n"; "NULL"
-	| RStat n -> pr "  struct guestfs_stat *r;\n"; "NULL"
-	| RStatVFS n -> pr "  struct guestfs_statvfs *r;\n"; "NULL"
-	| RDirentList n -> pr "  struct guestfs_dirent_list *r;\n"; "NULL" in
+	| RStruct (_, typ) -> pr "  struct guestfs_%s *r;\n" typ; "NULL"
+	| RStructList (_, typ) ->
+	    pr "  struct guestfs_%s_list *r;\n" typ; "NULL" in
       pr "\n";
 
       pr "  r = guestfs_%s " name;
@@ -7253,36 +6879,12 @@ static VALUE ruby_guestfs_close (VALUE gv)
 	   pr "  }\n";
 	   pr "  free (r);\n";
 	   pr "  return rv;\n"
-       | RIntBool _ ->
-	   pr "  VALUE rv = rb_ary_new2 (2);\n";
-	   pr "  rb_ary_push (rv, INT2NUM (r->i));\n";
-	   pr "  rb_ary_push (rv, INT2NUM (r->b));\n";
-	   pr "  guestfs_free_int_bool (r);\n";
-	   pr "  return rv;\n"
-       | RPVList n ->
-	   generate_ruby_lvm_code "pv" pv_cols
-       | RVGList n ->
-	   generate_ruby_lvm_code "vg" vg_cols
-       | RLVList n ->
-	   generate_ruby_lvm_code "lv" lv_cols
-       | RStat n ->
-	   pr "  VALUE rv = rb_hash_new ();\n";
-	   List.iter (
-	     function
-	     | name, `Int ->
-		 pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), ULL2NUM (r->%s));\n" name name
-	   ) stat_cols;
-	   pr "  free (r);\n";
-	   pr "  return rv;\n"
-       | RStatVFS n ->
-	   pr "  VALUE rv = rb_hash_new ();\n";
-	   List.iter (
-	     function
-	     | name, `Int ->
-		 pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), ULL2NUM (r->%s));\n" name name
-	   ) statvfs_cols;
-	   pr "  free (r);\n";
-	   pr "  return rv;\n"
+       | RStruct (_, typ) ->
+	   let cols = cols_of_struct typ in
+	   generate_ruby_struct_code typ cols
+       | RStructList (_, typ) ->
+	   let cols = cols_of_struct typ in
+	   generate_ruby_struct_list_code typ cols
        | RHashtable _ ->
 	   pr "  VALUE rv = rb_hash_new ();\n";
 	   pr "  int i;\n";
@@ -7293,8 +6895,6 @@ static VALUE ruby_guestfs_close (VALUE gv)
 	   pr "  }\n";
 	   pr "  free (r);\n";
 	   pr "  return rv;\n"
-       | RDirentList n ->
-	   generate_ruby_dirent_code "dirent" dirent_cols
       );
 
       pr "}\n";
@@ -7322,41 +6922,55 @@ void Init__guestfs ()
 
   pr "}\n"
 
-(* Ruby code to return an LVM struct list. *)
-and generate_ruby_lvm_code typ cols =
-  pr "  VALUE rv = rb_ary_new2 (r->len);\n";
-  pr "  int i;\n";
-  pr "  for (i = 0; i < r->len; ++i) {\n";
-  pr "    VALUE hv = rb_hash_new ();\n";
+(* Ruby code to return a struct. *)
+and generate_ruby_struct_code typ cols =
+  pr "  VALUE rv = rb_hash_new ();\n";
   List.iter (
     function
-    | name, `String ->
-	pr "    rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_str_new2 (r->val[i].%s));\n" name name
-    | name, `UUID ->
-	pr "    rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_str_new (r->val[i].%s, 32));\n" name name
-    | name, `Bytes
-    | name, `Int ->
-	pr "    rb_hash_aset (rv, rb_str_new2 (\"%s\"), ULL2NUM (r->val[i].%s));\n" name name
-    | name, `OptPercent ->
-	pr "    rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_dbl2big (r->val[i].%s));\n" name name
+    | name, FString ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_str_new2 (r->%s));\n" name name
+    | name, FUUID ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_str_new (r->%s, 32));\n" name name
+    | name, (FBytes|FUInt64) ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), ULL2NUM (r->%s));\n" name name
+    | name, FInt64 ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), LL2NUM (r->%s));\n" name name
+    | name, FUInt32 ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), UINT2NUM (r->%s));\n" name name
+    | name, FInt32 ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), INT2NUM (r->%s));\n" name name
+    | name, FOptPercent ->
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_dbl2big (r->%s));\n" name name
+    | name, FChar -> (* XXX wrong? *)
+	pr "  rb_hash_aset (rv, rb_str_new2 (\"%s\"), ULL2NUM (r->%s));\n" name name
   ) cols;
-  pr "    rb_ary_push (rv, hv);\n";
-  pr "  }\n";
-  pr "  guestfs_free_lvm_%s_list (r);\n" typ;
+  pr "  guestfs_free_%s (r);\n" typ;
   pr "  return rv;\n"
 
-(* Ruby code to return a dirent struct list. *)
-and generate_ruby_dirent_code typ cols =
+(* Ruby code to return a struct list. *)
+and generate_ruby_struct_list_code typ cols =
   pr "  VALUE rv = rb_ary_new2 (r->len);\n";
   pr "  int i;\n";
   pr "  for (i = 0; i < r->len; ++i) {\n";
   pr "    VALUE hv = rb_hash_new ();\n";
   List.iter (
     function
-    | name, `String ->
-	pr "    rb_hash_aset (rv, rb_str_new2 (\"%s\"), rb_str_new2 (r->val[i].%s));\n" name name
-    | name, (`Char|`Int) ->
-	pr "    rb_hash_aset (rv, rb_str_new2 (\"%s\"), ULL2NUM (r->val[i].%s));\n" name name
+    | name, FString ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), rb_str_new2 (r->val[i].%s));\n" name name
+    | name, FUUID ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), rb_str_new (r->val[i].%s, 32));\n" name name
+    | name, (FBytes|FUInt64) ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), ULL2NUM (r->val[i].%s));\n" name name
+    | name, FInt64 ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), LL2NUM (r->val[i].%s));\n" name name
+    | name, FUInt32 ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), UINT2NUM (r->val[i].%s));\n" name name
+    | name, FInt32 ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), INT2NUM (r->val[i].%s));\n" name name
+    | name, FOptPercent ->
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), rb_dbl2big (r->val[i].%s));\n" name name
+    | name, FChar -> (* XXX wrong? *)
+	pr "    rb_hash_aset (hv, rb_str_new2 (\"%s\"), ULL2NUM (r->val[i].%s));\n" name name
   ) cols;
   pr "    rb_ary_push (rv, hv);\n";
   pr "  }\n";
@@ -7495,14 +7109,13 @@ and generate_java_prototype ?(public=false) ?(privat=false) ?(native=false)
    | RBool _ -> pr "boolean ";
    | RConstString _ | RString _ -> pr "String ";
    | RStringList _ -> pr "String[] ";
-   | RIntBool _ -> pr "IntBool ";
-   | RPVList _ -> pr "PV[] ";
-   | RVGList _ -> pr "VG[] ";
-   | RLVList _ -> pr "LV[] ";
-   | RStat _ -> pr "Stat ";
-   | RStatVFS _ -> pr "StatVFS ";
+   | RStruct (_, typ) ->
+       let name = java_name_of_struct typ in
+       pr "%s " name;
+   | RStructList (_, typ) ->
+       let name = java_name_of_struct typ in
+       pr "%s[] " name;
    | RHashtable _ -> pr "HashMap<String,String> ";
-   | RDirentList _ -> pr "Dirent[] ";
   );
 
   if native then pr "_%s " name else pr "%s " name;
@@ -7537,7 +7150,7 @@ and generate_java_prototype ?(public=false) ?(privat=false) ?(native=false)
   pr "    throws LibGuestFSException";
   if semicolon then pr ";"
 
-and generate_java_struct typ cols =
+and generate_java_struct jtyp cols =
   generate_header CStyle LGPLv2;
 
   pr "\
@@ -7550,16 +7163,16 @@ package com.redhat.et.libguestfs;
  * @see GuestFS
  */
 public class %s {
-" typ typ;
+" jtyp jtyp;
 
   List.iter (
     function
-    | name, `String
-    | name, `UUID -> pr "  public String %s;\n" name
-    | name, `Bytes
-    | name, `Int -> pr "  public long %s;\n" name
-    | name, `Char -> pr "  public char %s;\n" name
-    | name, `OptPercent ->
+    | name, FString
+    | name, FUUID -> pr "  public String %s;\n" name
+    | name, (FBytes|FUInt64|FInt64) -> pr "  public long %s;\n" name
+    | name, (FUInt32|FInt32) -> pr "  public int %s;\n" name
+    | name, FChar -> pr "  public char %s;\n" name
+    | name, FOptPercent ->
 	pr "  /* The next field is [0..100] or -1 meaning 'not present': */\n";
 	pr "  public float %s;\n" name
   ) cols;
@@ -7623,9 +7236,9 @@ Java_com_redhat_et_libguestfs_GuestFS__1close
        | RInt64 _ -> pr "jlong ";
        | RBool _ -> pr "jboolean ";
        | RConstString _ | RString _ -> pr "jstring ";
-       | RIntBool _ | RStat _ | RStatVFS _ | RHashtable _ ->
+       | RStruct _ | RHashtable _ ->
 	   pr "jobject ";
-       | RStringList _ | RPVList _ | RVGList _ | RLVList _ | RDirentList _ ->
+       | RStringList _ | RStructList _ ->
 	   pr "jobjectArray ";
       );
       pr "JNICALL\n";
@@ -7666,46 +7279,18 @@ Java_com_redhat_et_libguestfs_GuestFS__1close
 	    pr "  jclass cl;\n";
 	    pr "  jstring jstr;\n";
 	    pr "  char **r;\n"; "NULL", "NULL"
-	| RIntBool _ ->
-	    pr "  jobject jr;\n";
-	    pr "  jclass cl;\n";
-	    pr "  jfieldID fl;\n";
-	    pr "  struct guestfs_int_bool *r;\n"; "NULL", "NULL"
-	| RStat _ ->
-	    pr "  jobject jr;\n";
-	    pr "  jclass cl;\n";
-	    pr "  jfieldID fl;\n";
-	    pr "  struct guestfs_stat *r;\n"; "NULL", "NULL"
-	| RStatVFS _ ->
+	| RStruct (_, typ) ->
 	    pr "  jobject jr;\n";
 	    pr "  jclass cl;\n";
 	    pr "  jfieldID fl;\n";
-	    pr "  struct guestfs_statvfs *r;\n"; "NULL", "NULL"
-	| RPVList _ ->
+	    pr "  struct guestfs_%s *r;\n" typ; "NULL", "NULL"
+	| RStructList (_, typ) ->
 	    pr "  jobjectArray jr;\n";
 	    pr "  jclass cl;\n";
 	    pr "  jfieldID fl;\n";
 	    pr "  jobject jfl;\n";
-	    pr "  struct guestfs_lvm_pv_list *r;\n"; "NULL", "NULL"
-	| RVGList _ ->
-	    pr "  jobjectArray jr;\n";
-	    pr "  jclass cl;\n";
-	    pr "  jfieldID fl;\n";
-	    pr "  jobject jfl;\n";
-	    pr "  struct guestfs_lvm_vg_list *r;\n"; "NULL", "NULL"
-	| RLVList _ ->
-	    pr "  jobjectArray jr;\n";
-	    pr "  jclass cl;\n";
-	    pr "  jfieldID fl;\n";
-	    pr "  jobject jfl;\n";
-	    pr "  struct guestfs_lvm_lv_list *r;\n"; "NULL", "NULL"
-	| RHashtable _ -> pr "  char **r;\n"; "NULL", "NULL"
-	| RDirentList _ ->
-	    pr "  jobjectArray jr;\n";
-	    pr "  jclass cl;\n";
-	    pr "  jfieldID fl;\n";
-	    pr "  jobject jfl;\n";
-	    pr "  struct guestfs_dirent_list *r;\n"; "NULL", "NULL" in
+	    pr "  struct guestfs_%s_list *r;\n" typ; "NULL", "NULL"
+	| RHashtable _ -> pr "  char **r;\n"; "NULL", "NULL" in
       List.iter (
 	function
 	| String n
@@ -7723,12 +7308,10 @@ Java_com_redhat_et_libguestfs_GuestFS__1close
 
       let needs_i =
 	(match fst style with
-	 | RStringList _ | RPVList _ | RVGList _ | RLVList _
-	 | RDirentList _ -> true
+	 | RStringList _ | RStructList _ -> true
 	 | RErr | RBool _ | RInt _ | RInt64 _ | RConstString _
-	 | RString _ | RIntBool _ | RStat _ | RStatVFS _
-	 | RHashtable _ -> false) ||
-	List.exists (function StringList _ -> true | _ -> false) (snd style) in
+	 | RString _ | RStruct _ | RHashtable _ -> false) ||
+	  List.exists (function StringList _ -> true | _ -> false) (snd style) in
       if needs_i then
 	pr "  int i;\n";
 
@@ -7815,68 +7398,67 @@ Java_com_redhat_et_libguestfs_GuestFS__1close
 	   pr "  }\n";
 	   pr "  free (r);\n";
 	   pr "  return jr;\n"
-       | RIntBool _ ->
-	   pr "  cl = (*env)->FindClass (env, \"com/redhat/et/libguestfs/IntBool\");\n";
-	   pr "  jr = (*env)->AllocObject (env, cl);\n";
-	   pr "  fl = (*env)->GetFieldID (env, cl, \"i\", \"I\");\n";
-	   pr "  (*env)->SetIntField (env, jr, fl, r->i);\n";
-	   pr "  fl = (*env)->GetFieldID (env, cl, \"i\", \"Z\");\n";
-	   pr "  (*env)->SetBooleanField (env, jr, fl, r->b);\n";
-	   pr "  guestfs_free_int_bool (r);\n";
-	   pr "  return jr;\n"
-       | RStat _ ->
-	   pr "  cl = (*env)->FindClass (env, \"com/redhat/et/libguestfs/Stat\");\n";
-	   pr "  jr = (*env)->AllocObject (env, cl);\n";
-	   List.iter (
-	     function
-	     | name, `Int ->
-		 pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"J\");\n"
-		   name;
-		 pr "  (*env)->SetLongField (env, jr, fl, r->%s);\n" name;
-	   ) stat_cols;
-	   pr "  free (r);\n";
-	   pr "  return jr;\n"
-       | RStatVFS _ ->
-	   pr "  cl = (*env)->FindClass (env, \"com/redhat/et/libguestfs/StatVFS\");\n";
-	   pr "  jr = (*env)->AllocObject (env, cl);\n";
-	   List.iter (
-	     function
-	     | name, `Int ->
-		 pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"J\");\n"
-		   name;
-		 pr "  (*env)->SetLongField (env, jr, fl, r->%s);\n" name;
-	   ) statvfs_cols;
-	   pr "  free (r);\n";
-	   pr "  return jr;\n"
-       | RPVList _ ->
-	   generate_java_lvm_return "pv" "PV" pv_cols
-       | RVGList _ ->
-	   generate_java_lvm_return "vg" "VG" vg_cols
-       | RLVList _ ->
-	   generate_java_lvm_return "lv" "LV" lv_cols
+       | RStruct (_, typ) ->
+	   let jtyp = java_name_of_struct typ in
+	   let cols = cols_of_struct typ in
+	   generate_java_struct_return typ jtyp cols
+       | RStructList (_, typ) ->
+	   let jtyp = java_name_of_struct typ in
+	   let cols = cols_of_struct typ in
+	   generate_java_struct_list_return typ jtyp cols
        | RHashtable _ ->
 	   (* XXX *)
 	   pr "  throw_exception (env, \"%s: internal error: please let us know how to make a Java HashMap from JNI bindings!\");\n" name;
 	   pr "  return NULL;\n"
-       | RDirentList _ ->
-	   generate_java_dirent_return "dirent" "Dirent" dirent_cols
       );
 
       pr "}\n";
       pr "\n"
   ) all_functions
 
-and generate_java_lvm_return typ jtyp cols =
+and generate_java_struct_return typ jtyp cols =
+  pr "  cl = (*env)->FindClass (env, \"com/redhat/et/libguestfs/%s\");\n" jtyp;
+  pr "  jr = (*env)->AllocObject (env, cl);\n";
+  List.iter (
+    function
+    | name, FString ->
+	pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"Ljava/lang/String;\");\n" name;
+	pr "  (*env)->SetObjectField (env, jr, fl, (*env)->NewStringUTF (env, r->%s));\n" name;
+    | name, FUUID ->
+	pr "  {\n";
+	pr "    char s[33];\n";
+	pr "    memcpy (s, r->%s, 32);\n" name;
+	pr "    s[32] = 0;\n";
+	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"Ljava/lang/String;\");\n" name;
+	pr "    (*env)->SetObjectField (env, jr, fl, (*env)->NewStringUTF (env, s));\n";
+	pr "  }\n";
+    | name, (FBytes|FUInt64|FInt64) ->
+	pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"J\");\n" name;
+	pr "  (*env)->SetLongField (env, jr, fl, r->%s);\n" name;
+    | name, (FUInt32|FInt32) ->
+	pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"I\");\n" name;
+	pr "  (*env)->SetLongField (env, jr, fl, r->%s);\n" name;
+    | name, FOptPercent ->
+	pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"F\");\n" name;
+	pr "  (*env)->SetFloatField (env, jr, fl, r->%s);\n" name;
+    | name, FChar ->
+	pr "  fl = (*env)->GetFieldID (env, cl, \"%s\", \"C\");\n" name;
+	pr "  (*env)->SetLongField (env, jr, fl, r->%s);\n" name;
+  ) cols;
+  pr "  free (r);\n";
+  pr "  return jr;\n"
+
+and generate_java_struct_list_return typ jtyp cols =
   pr "  cl = (*env)->FindClass (env, \"com/redhat/et/libguestfs/%s\");\n" jtyp;
   pr "  jr = (*env)->NewObjectArray (env, r->len, cl, NULL);\n";
   pr "  for (i = 0; i < r->len; ++i) {\n";
   pr "    jfl = (*env)->AllocObject (env, cl);\n";
   List.iter (
     function
-    | name, `String ->
+    | name, FString ->
 	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"Ljava/lang/String;\");\n" name;
 	pr "    (*env)->SetObjectField (env, jfl, fl, (*env)->NewStringUTF (env, r->val[i].%s));\n" name;
-    | name, `UUID ->
+    | name, FUUID ->
 	pr "    {\n";
 	pr "      char s[33];\n";
 	pr "      memcpy (s, r->val[i].%s, 32);\n" name;
@@ -7884,30 +7466,17 @@ and generate_java_lvm_return typ jtyp cols =
 	pr "      fl = (*env)->GetFieldID (env, cl, \"%s\", \"Ljava/lang/String;\");\n" name;
 	pr "      (*env)->SetObjectField (env, jfl, fl, (*env)->NewStringUTF (env, s));\n";
 	pr "    }\n";
-    | name, (`Bytes|`Int) ->
+    | name, (FBytes|FUInt64|FInt64) ->
 	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"J\");\n" name;
 	pr "    (*env)->SetLongField (env, jfl, fl, r->val[i].%s);\n" name;
-    | name, `OptPercent ->
+    | name, (FUInt32|FInt32) ->
+	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"I\");\n" name;
+	pr "    (*env)->SetLongField (env, jfl, fl, r->val[i].%s);\n" name;
+    | name, FOptPercent ->
 	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"F\");\n" name;
 	pr "    (*env)->SetFloatField (env, jfl, fl, r->val[i].%s);\n" name;
-  ) cols;
-  pr "    (*env)->SetObjectArrayElement (env, jfl, i, jfl);\n";
-  pr "  }\n";
-  pr "  guestfs_free_lvm_%s_list (r);\n" typ;
-  pr "  return jr;\n"
-
-and generate_java_dirent_return typ jtyp cols =
-  pr "  cl = (*env)->FindClass (env, \"com/redhat/et/libguestfs/%s\");\n" jtyp;
-  pr "  jr = (*env)->NewObjectArray (env, r->len, cl, NULL);\n";
-  pr "  for (i = 0; i < r->len; ++i) {\n";
-  pr "    jfl = (*env)->AllocObject (env, cl);\n";
-  List.iter (
-    function
-    | name, `String ->
-	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"Ljava/lang/String;\");\n" name;
-	pr "    (*env)->SetObjectField (env, jfl, fl, (*env)->NewStringUTF (env, r->val[i].%s));\n" name;
-    | name, (`Char|`Int) ->
-	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"J\");\n" name;
+    | name, FChar ->
+	pr "    fl = (*env)->GetFieldID (env, cl, \"%s\", \"C\");\n" name;
 	pr "    (*env)->SetLongField (env, jfl, fl, r->val[i].%s);\n" name;
   ) cols;
   pr "    (*env)->SetObjectArrayElement (env, jfl, i, jfl);\n";
@@ -7930,14 +7499,9 @@ and generate_haskell_hs () =
     | RConstString _, _
     | RString _, _
     | RStringList _, _
-    | RIntBool _, _
-    | RPVList _, _
-    | RVGList _, _
-    | RLVList _, _
-    | RStat _, _
-    | RStatVFS _, _
-    | RHashtable _, _
-    | RDirentList _, _ -> false in
+    | RStruct _, _
+    | RStructList _, _
+    | RHashtable _, _ -> false in
 
   pr "\
 {-# INCLUDE <guestfs.h> #-}
@@ -8046,9 +7610,8 @@ last_error h = do
 	     pr "    then do\n";
 	     pr "      err <- last_error h\n";
 	     pr "      fail err\n";
-	 | RConstString _ | RString _ | RStringList _ | RIntBool _
-	 | RPVList _ | RVGList _ | RLVList _ | RStat _ | RStatVFS _
-	 | RHashtable _ | RDirentList _ ->
+	 | RConstString _ | RString _ | RStringList _ | RStruct _
+	 | RStructList _ | RHashtable _ ->
 	     pr "  if (r == nullPtr)\n";
 	     pr "    then do\n";
 	     pr "      err <- last_error h\n";
@@ -8066,14 +7629,9 @@ last_error h = do
 	 | RConstString _
 	 | RString _
 	 | RStringList _
-	 | RIntBool _
-	 | RPVList _
-	 | RVGList _
-	 | RLVList _
-	 | RStat _
-	 | RStatVFS _
-	 | RHashtable _
-	 | RDirentList _ ->
+	 | RStruct _
+	 | RStructList _
+	 | RHashtable _ ->
 	     pr "    else return ()\n" (* XXXXXXXXXXXXXXXXXXXX *)
 	);
 	pr "\n";
@@ -8108,14 +7666,13 @@ and generate_haskell_prototype ~handle ?(hs = false) style =
    | RConstString _ -> pr "%s" string
    | RString _ -> pr "%s" string
    | RStringList _ -> pr "[%s]" string
-   | RIntBool _ -> pr "IntBool"
-   | RPVList _ -> pr "[PV]"
-   | RVGList _ -> pr "[VG]"
-   | RLVList _ -> pr "[LV]"
-   | RStat _ -> pr "Stat"
-   | RStatVFS _ -> pr "StatVFS"
+   | RStruct (_, typ) ->
+       let name = java_name_of_struct typ in
+       pr "%s" name
+   | RStructList (_, typ) ->
+       let name = java_name_of_struct typ in
+       pr "[%s]" name
    | RHashtable _ -> pr "Hashtable"
-   | RDirentList _ -> pr "[Dirent]"
   );
   pr ")"
 
@@ -8132,6 +7689,8 @@ and generate_bindtests () =
 #include \"guestfs_protocol.h\"
 
 #define error guestfs_error
+#define safe_calloc guestfs_safe_calloc
+#define safe_malloc guestfs_safe_malloc
 
 static void
 print_strings (char * const* const argv)
@@ -8207,84 +7766,36 @@ print_strings (char * const* const argv)
 	     pr "  char **strs;\n";
 	     pr "  int n, i;\n";
 	     pr "  sscanf (val, \"%%d\", &n);\n";
-	     pr "  strs = malloc ((n+1) * sizeof (char *));\n";
+	     pr "  strs = safe_malloc (g, (n+1) * sizeof (char *));\n";
 	     pr "  for (i = 0; i < n; ++i) {\n";
-	     pr "    strs[i] = malloc (16);\n";
+	     pr "    strs[i] = safe_malloc (g, 16);\n";
 	     pr "    snprintf (strs[i], 16, \"%%d\", i);\n";
 	     pr "  }\n";
 	     pr "  strs[n] = NULL;\n";
 	     pr "  return strs;\n"
-	 | RIntBool _ ->
-	     pr "  struct guestfs_int_bool *r;\n";
-	     pr "  r = malloc (sizeof (struct guestfs_int_bool));\n";
-	     pr "  sscanf (val, \"%%\" SCNi32, &r->i);\n";
-	     pr "  r->b = 0;\n";
-	     pr "  return r;\n"
-	 | RPVList _ ->
-	     pr "  struct guestfs_lvm_pv_list *r;\n";
-	     pr "  int i;\n";
-	     pr "  r = malloc (sizeof (struct guestfs_lvm_pv_list));\n";
-	     pr "  sscanf (val, \"%%d\", &r->len);\n";
-	     pr "  r->val = calloc (r->len, sizeof (struct guestfs_lvm_pv));\n";
-	     pr "  for (i = 0; i < r->len; ++i) {\n";
-	     pr "    r->val[i].pv_name = malloc (16);\n";
-	     pr "    snprintf (r->val[i].pv_name, 16, \"%%d\", i);\n";
-	     pr "  }\n";
-	     pr "  return r;\n"
-	 | RVGList _ ->
-	     pr "  struct guestfs_lvm_vg_list *r;\n";
-	     pr "  int i;\n";
-	     pr "  r = malloc (sizeof (struct guestfs_lvm_vg_list));\n";
-	     pr "  sscanf (val, \"%%d\", &r->len);\n";
-	     pr "  r->val = calloc (r->len, sizeof (struct guestfs_lvm_vg));\n";
-	     pr "  for (i = 0; i < r->len; ++i) {\n";
-	     pr "    r->val[i].vg_name = malloc (16);\n";
-	     pr "    snprintf (r->val[i].vg_name, 16, \"%%d\", i);\n";
-	     pr "  }\n";
+	 | RStruct (_, typ) ->
+	     pr "  struct guestfs_%s *r;\n" typ;
+	     pr "  r = safe_calloc (g, sizeof *r, 1);\n";
 	     pr "  return r;\n"
-	 | RLVList _ ->
-	     pr "  struct guestfs_lvm_lv_list *r;\n";
-	     pr "  int i;\n";
-	     pr "  r = malloc (sizeof (struct guestfs_lvm_lv_list));\n";
+	 | RStructList (_, typ) ->
+	     pr "  struct guestfs_%s_list *r;\n" typ;
+	     pr "  r = safe_calloc (g, sizeof *r, 1);\n";
 	     pr "  sscanf (val, \"%%d\", &r->len);\n";
-	     pr "  r->val = calloc (r->len, sizeof (struct guestfs_lvm_lv));\n";
-	     pr "  for (i = 0; i < r->len; ++i) {\n";
-	     pr "    r->val[i].lv_name = malloc (16);\n";
-	     pr "    snprintf (r->val[i].lv_name, 16, \"%%d\", i);\n";
-	     pr "  }\n";
-	     pr "  return r;\n"
-	 | RStat _ ->
-	     pr "  struct guestfs_stat *r;\n";
-	     pr "  r = calloc (1, sizeof (*r));\n";
-	     pr "  sscanf (val, \"%%\" SCNi64, &r->dev);\n";
-	     pr "  return r;\n"
-	 | RStatVFS _ ->
-	     pr "  struct guestfs_statvfs *r;\n";
-	     pr "  r = calloc (1, sizeof (*r));\n";
-	     pr "  sscanf (val, \"%%\" SCNi64, &r->bsize);\n";
+	     pr "  r->val = safe_calloc (g, r->len, sizeof *r->val);\n";
 	     pr "  return r;\n"
 	 | RHashtable _ ->
 	     pr "  char **strs;\n";
 	     pr "  int n, i;\n";
 	     pr "  sscanf (val, \"%%d\", &n);\n";
-	     pr "  strs = malloc ((n*2+1) * sizeof (char *));\n";
+	     pr "  strs = safe_malloc (g, (n*2+1) * sizeof (*strs));\n";
 	     pr "  for (i = 0; i < n; ++i) {\n";
-	     pr "    strs[i*2] = malloc (16);\n";
-	     pr "    strs[i*2+1] = malloc (16);\n";
+	     pr "    strs[i*2] = safe_malloc (g, 16);\n";
+	     pr "    strs[i*2+1] = safe_malloc (g, 16);\n";
 	     pr "    snprintf (strs[i*2], 16, \"%%d\", i);\n";
 	     pr "    snprintf (strs[i*2+1], 16, \"%%d\", i);\n";
 	     pr "  }\n";
 	     pr "  strs[n*2] = NULL;\n";
 	     pr "  return strs;\n"
-	 | RDirentList _ ->
-	     pr "  struct guestfs_dirent_list *r;\n";
-	     pr "  int i;\n";
-	     pr "  r = malloc (sizeof (struct guestfs_dirent_list));\n";
-	     pr "  sscanf (val, \"%%d\", &r->len);\n";
-	     pr "  r->val = calloc (r->len, sizeof (struct guestfs_dirent));\n";
-	     pr "  for (i = 0; i < r->len; ++i)\n";
-	     pr "    r->val[i].ino = i;\n";
-	     pr "  return r;\n"
 	);
 	pr "}\n";
 	pr "\n"
@@ -8298,10 +7809,9 @@ print_strings (char * const* const argv)
 	 | RErr | RInt _ | RInt64 _ | RBool _ ->
 	     pr "  return -1;\n"
 	 | RConstString _
-	 | RString _ | RStringList _ | RIntBool _
-	 | RPVList _ | RVGList _ | RLVList _ | RStat _ | RStatVFS _
-	 | RHashtable _
-	 | RDirentList _ ->
+	 | RString _ | RStringList _ | RStruct _
+	 | RStructList _
+	 | RHashtable _ ->
 	     pr "  return NULL;\n"
 	);
 	pr "}\n";
@@ -8554,7 +8064,7 @@ and generate_lang_bindtests call =
 		CallStringList ["1"]; CallBool false;
 		CallInt 0; CallString ""; CallString ""]
 
-  (* XXX Add here tests of the return and error functions. *)
+(* XXX Add here tests of the return and error functions. *)
 
 (* This is used to generate the src/MAX_PROC_NR file which
  * contains the maximum procedure number, a surrogate for the
@@ -8593,7 +8103,7 @@ let output_to filename =
 let () =
   check_functions ();
 
-  if not (Sys.file_exists "configure.ac") then (
+  if not (Sys.file_exists "HACKING") then (
     eprintf "\
 You are probably running this from the wrong directory.
 Run it from the top source directory using the command
@@ -8710,29 +8220,14 @@ Run it from the top source directory using the command
   generate_java_java ();
   close ();
 
-  let close = output_to "java/com/redhat/et/libguestfs/PV.java" in
-  generate_java_struct "PV" pv_cols;
-  close ();
-
-  let close = output_to "java/com/redhat/et/libguestfs/VG.java" in
-  generate_java_struct "VG" vg_cols;
-  close ();
-
-  let close = output_to "java/com/redhat/et/libguestfs/LV.java" in
-  generate_java_struct "LV" lv_cols;
-  close ();
-
-  let close = output_to "java/com/redhat/et/libguestfs/Stat.java" in
-  generate_java_struct "Stat" stat_cols;
-  close ();
-
-  let close = output_to "java/com/redhat/et/libguestfs/StatVFS.java" in
-  generate_java_struct "StatVFS" statvfs_cols;
-  close ();
-
-  let close = output_to "java/com/redhat/et/libguestfs/Dirent.java" in
-  generate_java_struct "Dirent" dirent_cols;
-  close ();
+  List.iter (
+    fun (typ, jtyp) ->
+      let cols = cols_of_struct typ in
+      let filename = sprintf "java/com/redhat/et/libguestfs/%s.java" jtyp in
+      let close = output_to filename in
+      generate_java_struct jtyp cols;
+      close ();
+  ) java_structs;
 
   let close = output_to "java/com_redhat_et_libguestfs_GuestFS.c" in
   generate_java_c ();