1 #!/usr/bin/ocamlrun /usr/bin/ocaml
3 (* virt-p2v is a script which performs a physical to
4 * virtual conversion of local disks.
6 * Copyright (C) 2007-2008 Red Hat Inc.
7 * Written by Richard W.M. Jones <rjones@redhat.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #directory "+extlib";;
29 #directory "+xml-light";;
30 #load "xml-light.cma";;
37 type state = { greeting : bool;
38 remote_host : string option; remote_port : string option;
39 remote_directory : string option;
40 remote_username : string option;
41 network : network option;
42 static_network_config : static_network_config option;
43 devices_to_send : string list option;
44 root_filesystem : partition option;
45 hypervisor : hypervisor option;
46 architecture : architecture option;
47 memory : int option; vcpus : int option;
48 mac_address : string option;
54 and partition = Part of string * string (* eg. "hda", "1" *)
55 | LV of string * string (* eg. "VolGroup00", "LogVol00" *)
56 and hypervisor = Xen | QEMU | KVM
57 and architecture = I386 | X86_64 | IA64 | PPC | PPC64 | SPARC | SPARC64
58 | OtherArch of string | UnknownArch
59 and static_network_config = string * string * string * string * string
60 (* interface, address, netmask, gateway, nameserver *)
62 (*----------------------------------------------------------------------*)
63 (* TO MAKE A CUSTOM virt-p2v SCRIPT, adjust the defaults in this section.
65 * If left as they are, then this will create a generic virt-p2v script
66 * which asks the user for each question. If you set the defaults here
67 * then you will get a custom virt-p2v which is partially or even fully
68 * automated and won't ask the user any questions.
70 * Note that 'None' means 'no default' (ie. ask the user) whereas
71 * 'Some foo' means use 'foo' as the answer.
74 (* If greeting is true, wait for keypress after boot and during
75 * final verification. Set to 'false' for less interactions.
79 (* These are now documented in the man page virt-p2v(1).
80 * 'None' means ask the user.
81 * After changing them, run './virt-p2v --test' to check syntax.
85 remote_directory = None;
86 remote_username = None;
87 devices_to_send = None;
88 root_filesystem = None;
90 static_network_config = None;
97 (* END OF CUSTOM virt-p2v SCRIPT SECTION. *)
98 (*----------------------------------------------------------------------*)
100 (* General helper functions. *)
102 let sort_uniq ?(cmp = compare) xs = (* sort and uniq a list *)
103 let xs = List.sort ~cmp xs in
104 let rec loop = function
105 | [] -> [] | [x] -> [x]
106 | x1 :: x2 :: xs when x1 = x2 -> loop (x1 :: xs)
107 | x :: xs -> x :: loop xs
111 let input_all_lines chan =
112 let lines = ref [] in
114 while true do lines := input_line chan :: !lines done; []
116 End_of_file -> List.rev !lines
118 let dev_of_partition = function
119 | Part (dev, partnum) -> sprintf "/dev/%s%s" dev partnum
120 | LV (vg, lv) -> sprintf "/dev/%s/%s" vg lv
122 let string_of_architecture = function
129 | SPARC64 -> "sparc64"
130 | OtherArch arch -> arch
133 type dialog_status = Yes of string list | No | Help | Back | Error
135 type ask_result = Next of state | Prev | Ask_again
137 type nature = LinuxSwap
138 | LinuxRoot of architecture * linux_distro
139 | WindowsRoot (* Windows C: *)
140 | LinuxBoot (* Linux /boot *)
141 | NotRoot (* mountable, but not / or /boot *)
143 and linux_distro = RHEL of int * int
145 | Debian of int * int
148 let rec string_of_nature = function
149 | LinuxSwap -> "Linux swap"
150 | LinuxRoot (architecture, distro) ->
151 string_of_linux_distro distro ^ " " ^ string_of_architecture architecture
152 | WindowsRoot -> "Windows root"
153 | LinuxBoot -> "Linux /boot"
154 | NotRoot -> "Mountable non-root"
155 | UnknownNature -> "Unknown"
156 and string_of_linux_distro = function
157 | RHEL (a,b) -> sprintf "RHEL %d.%d" a b
158 | Fedora v -> sprintf "Fedora %d" v
159 | Debian (a,b) -> sprintf "Debian %d.%d" a b
160 | OtherLinux -> "Linux"
164 * Each function takes some common parameters (eg. ~title) and some
165 * dialog-specific parameters.
167 * Returns the exit status (Yes lines | No | Help | Back | Error).
169 let msgbox, yesno, inputbox, radiolist, checklist, form =
170 (* Internal function to actually run the "dialog" shell command. *)
171 let run_dialog cparams params =
172 let params = cparams @ params in
173 eprintf "dialog %s\n%!"
174 (String.concat " " (List.map (sprintf "%S") params));
176 (* 'dialog' writes its output/result to stderr, so we need to take
177 * special steps to capture that - in other words, manual pipe/fork.
179 let rfd, wfd = pipe () in
181 | 0 -> (* child, runs dialog *)
183 dup2 wfd stderr; (* capture stderr to pipe *)
184 execvp "dialog" (Array.of_list ("dialog" :: params))
185 | pid -> (* parent *)
187 let chan = in_channel_of_descr rfd in
188 let result = input_all_lines chan in
190 eprintf "dialog result: %S\n%!" (String.concat "\n" result);
191 match snd (wait ()) with
192 | WEXITED 0 -> Yes result (* something selected / entered *)
193 | WEXITED 1 -> No (* cancel / no button *)
194 | WEXITED 2 -> Help (* help pressed *)
195 | WEXITED 3 -> Back (* back button *)
196 | WEXITED _ -> Error (* error or Esc *)
197 | WSIGNALED i -> failwith (sprintf "dialog: killed by signal %d" i)
198 | WSTOPPED i -> failwith (sprintf "dialog: stopped by signal %d" i)
201 (* Handle the common parameters. Note Continuation Passing Style. *)
202 let with_common cont ?(cancel=false) ?(backbutton=true) title =
203 let params = ["--title"; title] in
204 let params = if not cancel then "--nocancel" :: params else params in
206 if backbutton then "--extra-button" :: "--extra-label" :: "Back" :: params
211 (* Message box and yes/no box. *)
214 fun cparams text height width ->
216 [ "--msgbox"; text; string_of_int height; string_of_int width ]
220 fun cparams text height width ->
222 [ "--yesno"; text; string_of_int height; string_of_int width ]
225 (* Simple input box. *)
228 fun cparams text height width default ->
230 [ "--inputbox"; text; string_of_int height; string_of_int width;
234 (* Radio list and check list. *)
237 fun cparams text height width listheight items ->
238 let items = List.map (
240 | tag, item, true -> [ tag; item; "on" ]
241 | tag, item, false -> [ tag; item; "off" ]
243 let items = List.concat items in
244 let items = "--single-quoted" ::
245 "--radiolist" :: text ::
246 string_of_int height :: string_of_int width ::
247 string_of_int listheight :: items in
248 run_dialog cparams items
252 fun cparams text height width listheight items ->
253 let items = List.map (
255 | tag, item, true -> [ tag; item; "on" ]
256 | tag, item, false -> [ tag; item; "off" ]
258 let items = List.concat items in
259 let items = "--separate-output" ::
260 "--checklist" :: text ::
261 string_of_int height :: string_of_int width ::
262 string_of_int listheight :: items in
263 run_dialog cparams items
269 fun cparams text height width formheight items ->
270 let items = List.map (
271 fun (label, y, x, item, y', x', flen, ilen) ->
272 [ label; string_of_int y; string_of_int x; item;
273 string_of_int y'; string_of_int x';
274 string_of_int flen; string_of_int ilen ]
276 let items = List.concat items in
277 let items = "--form" :: text ::
278 string_of_int height :: string_of_int width ::
279 string_of_int formheight :: items in
280 run_dialog cparams items
283 msgbox, yesno, inputbox, radiolist, checklist, form
285 (* Print failure dialog and exit. *)
286 let fail_dialog text =
287 let text = "\n" ^ text ^ "\n\nIf you want to report this error, there is a shell on [ALT] [F2], log in as root with no password.\n\nPlease provide the contents of /tmp/virt-p2v.log and output of the 'dmesg' command." in
288 ignore (msgbox "Error" text 17 50);
291 (* Shell-safe quoting function. In fact there's one in stdlib so use it. *)
292 let quote = Filename.quote
294 (* Run a shell command and check it returns 0. *)
296 eprintf "sh: %s\n%!" cmd;
297 if Sys.command cmd <> 0 then fail_dialog (sprintf "Command failed:\n\n%s" cmd)
300 eprintf "shfailok: %s\n%!" cmd;
301 ignore (Sys.command cmd)
303 let shwithstatus cmd =
304 eprintf "shwithstatus: %s\n%!" cmd;
307 (* Same as `cmd` in shell. Any error message will be in the logfile. *)
309 eprintf "shget: %s\n%!" cmd;
310 let chan = open_process_in cmd in
311 let lines = input_all_lines chan in
312 match close_process_in chan with
313 | WEXITED 0 -> Some lines (* command succeeded *)
314 | WEXITED _ -> None (* command failed *)
315 | WSIGNALED i -> failwith (sprintf "shget: command killed by signal %d" i)
316 | WSTOPPED i -> failwith (sprintf "shget: command stopped by signal %d" i)
318 (* Start an interactive shell. Need to juggle file descriptors a bit
319 * because bash write PS1 to stderr (currently directed to the logfile).
323 | 0 -> (* child, runs bash *)
326 (* Sys.command runs 'sh -c' which blows away PS1, so set it late. *)
328 Sys.command "PS1='\\u@\\h:\\w\\$ ' /bin/bash --norc --noprofile -i"
330 | _ -> (* parent, waits *)
331 eprintf "waiting for subshell to exit\n%!";
334 (* Some true if is dir/file, Some false if not, None if not found. *)
336 try Some ((stat path).st_kind = S_DIR)
337 with Unix_error (ENOENT, "stat", _) -> None
339 try Some ((stat path).st_kind = S_REG)
340 with Unix_error (ENOENT, "stat", _) -> None
342 (* Useful regular expression. *)
343 let whitespace = Pcre.regexp "[ \t]+"
345 (* Generate a predictable safe name containing only letters, numbers
346 * and underscores. If passed a string with no letters or numbers,
347 * generates "_1", "_2", etc.
352 fun () -> incr i; "_" ^ string_of_int !i
355 let is_safe = function 'a'..'z'|'A'..'Z'|'0'..'9' -> true | _ -> false in
356 let name = String.copy name in
357 let have_safe = ref false in
358 for i = 0 to String.length name - 1 do
359 if not (is_safe name.[i]) then name.[i] <- '_' else have_safe := true
361 if !have_safe then name else next_anon ()
363 type block_device = string * int64 (* "hda" & size in bytes *)
365 (* Parse the output of 'lvs' to get list of LV names, sizes,
366 * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize).
369 let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in
373 shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size"
377 let lines = List.map (Pcre.split ~rex:whitespace) lines in
380 | [vg; lv; pvs; lvsize]
381 | [_; vg; lv; pvs; lvsize] ->
382 let pvs = String.nsplit pvs "," in
383 let pvs = List.filter_map (
386 let subs = Pcre.exec ~rex:devname pv in
387 Some (Pcre.get_substring subs 1)
390 eprintf "lvs: unexpected device name: %s\n%!" pv;
393 LV (vg, lv), pvs, lvsize
395 failwith ("lvs: unexpected output: " ^ String.concat "," line)
398 (* Get the partitions on a block device.
399 * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")]
401 let get_partitions dev =
402 let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in
403 let devdir = "/sys/block/" ^ dev in
404 let parts = Sys.readdir devdir in
405 let parts = Array.to_list parts in
406 let parts = List.filter (
407 fun name -> Some true = is_dir (devdir ^ "/" ^ name)
409 let parts = List.filter_map (
412 let subs = Pcre.exec ~rex part in
413 Some (Part (dev, Pcre.get_substring subs 1))
419 (* Generate snapshot device name from device name. *)
420 let snapshot_name dev =
421 "snap" ^ (safe_name dev)
423 (* Perform a device-mapper snapshot with ramdisk overlay. *)
425 let next_free_ram_disk =
427 fun () -> incr i; "/dev/ram" ^ string_of_int !i
429 fun origin_dev snapshot_dev ->
430 let ramdisk = next_free_ram_disk () in
432 let cmd = "blockdev --getsz " ^ quote ("/dev/" ^ origin_dev) in
433 let lines = shget cmd in
435 | Some (sectors::_) -> Int64.of_string sectors
437 fail_dialog (sprintf "Snapshot failed - unable to read the size in sectors of block device %s" origin_dev) in
439 (* Create the snapshot origin device. Called, eg. snap_sda1_org *)
440 sh (sprintf "dmsetup create %s_org --table='0 %Ld snapshot-origin /dev/%s'"
441 snapshot_dev sectors origin_dev);
442 (* Create the snapshot. *)
443 sh (sprintf "dmsetup create %s --table='0 %Ld snapshot /dev/mapper/%s_org %s n 64'"
444 snapshot_dev sectors snapshot_dev ramdisk)
446 (* Try to perform automatic network configuration, assuming a Fedora or
447 * RHEL-like root filesystem mounted on /mnt/root.
449 let auto_network state =
450 (* Fedora gives an error if this file doesn't exist. *)
451 sh "touch /etc/resolv.conf";
453 (* NB. Lazy unmount is required because dhclient keeps its current
454 * directory open on /etc/sysconfig/network-scripts/
456 sh "mount -o bind /mnt/root/etc /etc";
457 let status = shwithstatus "/etc/init.d/network start" in
460 (* Try to ping the remote host to see if this worked. *)
461 shfailok ("ping -c 3 " ^ Option.map_default quote "" state.remote_host);
463 if state.greeting then (
464 printf "\n\nDid automatic network configuration work?\n";
465 printf "Hint: If not sure, there is a shell on console [ALT] [F2]\n";
467 let line = read_line () in
468 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
471 (* Non-interactive: return the status of /etc/init.d/network start. *)
474 (* Configure the network statically. *)
475 let static_network state =
476 match state.static_network_config with
477 | None -> false (* failed *)
478 | Some (interface, address, netmask, gateway, nameserver) ->
479 let do_cmd_or_exit cmd = if shwithstatus cmd <> 0 then raise Exit in
481 do_cmd_or_exit (sprintf "ifconfig %s %s netmask %s"
482 (quote interface) (quote address) (quote netmask));
483 do_cmd_or_exit (sprintf "route add default gw %s %s"
484 (quote gateway) (quote interface));
485 if nameserver <> "" then
486 do_cmd_or_exit (sprintf "echo nameserver %s > /etc/resolv.conf"
490 Exit -> false (* failed *)
492 let qemu_network () =
493 sh "ifconfig eth0 10.0.2.10 netmask 255.255.255.0";
494 sh "route add default gw 10.0.2.2 eth0";
495 sh "echo nameserver 10.0.2.3 > /etc/resolv.conf"
497 (* Map local device names to remote devices names. At the moment we
498 * just change sd* to hd* (as device names appear under fullvirt). In
499 * future, lots of complex possibilities.
501 let remote_of_origin_dev =
502 let devsd = Pcre.regexp "^sd([[:alpha:]]+[[:digit:]]*)$" in
503 let devsd_subst = Pcre.subst "hd$1" in
505 Pcre.replace ~rex:devsd ~itempl:devsd_subst dev
507 (* Rewrite /mnt/root/etc/fstab. *)
508 let rewrite_fstab state devices_to_send =
509 let filename = "/mnt/root/etc/fstab" in
510 if is_file filename = Some true then (
511 sh ("cp " ^ quote filename ^ " " ^ quote (filename ^ ".p2vsaved"));
513 let chan = open_in filename in
514 let lines = input_all_lines chan in
516 let lines = List.map (Pcre.split ~rex:whitespace) lines in
517 let lines = List.map (
519 | dev :: rest when String.starts_with dev "/dev/" ->
520 let dev = String.sub dev 5 (String.length dev - 5) in
521 let dev = remote_of_origin_dev dev in
522 let dev = "/dev/" ^ dev in
527 let chan = open_out filename in
530 | [dev; mountpoint; fstype; options; freq; passno] ->
531 fprintf chan "%-23s %-23s %-7s %-15s %s %s\n"
532 dev mountpoint fstype options freq passno
534 output_string chan (String.concat " " line)
539 let () = Random.self_init ()
541 let random_mac_address () =
543 List.map (sprintf "%02x") (
544 List.map (fun _ -> Random.int 256) [0;0;0]
546 String.concat ":" ("00"::"16"::"3e"::random)
549 let hex = "0123456789abcdef" in
551 let str = String.create 32 in
552 for i = 0 to 31 do str.[i] <- hex.[Random.int 16] done;
555 (* Main entry point. *)
556 let rec main ttyname =
557 (* Running from an init script. We don't have much of a
558 * login environment, so set one up.
562 ["/usr/sbin"; "/sbin"; "/usr/local/bin"; "/usr/kerberos/bin";
563 "/usr/bin"; "/bin"]);
564 putenv "HOME" "/root";
565 putenv "LOGNAME" "root";
567 (* We can safely write in /tmp (it's a synthetic live CD directory). *)
570 (* Set up logging to /tmp/virt-p2v.log. *)
571 let fd = openfile "virt-p2v.log" [ O_WRONLY; O_APPEND; O_CREAT ] 0o644 in
575 (* Log the start up time. *)
576 eprintf "\n\n**************************************************\n\n";
577 let tm = localtime (time ()) in
578 eprintf "virt-p2v-ng starting up at %04d-%02d-%02d %02d:%02d:%02d\n\n%!"
579 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min tm.tm_sec;
581 (* Connect stdin/stdout to the tty. *)
585 let fd = openfile ("/dev/" ^ ttyname) [ O_RDWR ] 0 in
589 printf "virt-p2v starting up ...\n%!";
591 (* Disable screen blanking on tty. *)
592 sh "setterm -blank 0";
594 (* Check that the environment is a sane-looking live CD. If not, bail. *)
595 if is_dir "/mnt/root" <> Some true then
597 "You should only run this script from the live CD or a USB key.";
599 printf "virt-p2v detecting hard drives (this may take some time) ...\n%!";
601 (* Search for all non-removable block devices. Do this early and bail
602 * if we can't find anything. This is a list of strings, like "hda".
604 let all_block_devices : block_device list =
605 let rex = Pcre.regexp "^[hs]d" in
606 let devices = Array.to_list (Sys.readdir "/sys/block") in
607 let devices = List.sort devices in
608 let devices = List.filter (fun d -> Pcre.pmatch ~rex d) devices in
609 eprintf "all_block_devices: block devices: %s\n%!"
610 (String.concat "; " devices);
611 (* Run blockdev --getsize64 on each, and reject any where this fails
612 * (probably removable devices).
614 let devices = List.filter_map (
616 let cmd = "blockdev --getsize64 " ^ quote ("/dev/" ^ d) in
617 let lines = shget cmd in
619 | Some (blksize::_) -> Some (d, Int64.of_string blksize)
620 | Some [] | None -> None
622 eprintf "all_block_devices: non-removable block devices: %s\n%!"
624 (List.map (fun (d, b) -> sprintf "%s [%Ld]" d b) devices));
626 fail_dialog "No non-removable block devices (hard disks, etc.) could be found on this machine.";
629 (* Search for partitions and LVs (anything that could contain a
630 * filesystem directly). We refer to these generically as
633 let all_partitions : partition list =
636 let lvs = get_lvs () in
637 let pvs = List.map (fun (_, pvs, _) -> pvs) lvs in
638 let pvs = List.concat pvs in
639 let pvs = sort_uniq pvs in
640 eprintf "all_partitions: PVs: %s\n%!" (String.concat "; " pvs);
641 let lvs = List.map (fun (lvname, _, _) -> lvname) lvs in
642 eprintf "all_partitions: LVs: %s\n%!"
643 (String.concat "; " (List.map dev_of_partition lvs));
646 (* Partitions (eg. "sda1", "sda2"). *)
648 let parts = List.map fst all_block_devices in
649 let parts = List.map get_partitions parts in
650 let parts = List.concat parts in
651 eprintf "all_partitions: all partitions: %s\n%!"
652 (String.concat "; " (List.map dev_of_partition parts));
654 (* Remove any partitions which are PVs. *)
655 let parts = List.filter (
657 | Part (dev, partnum) -> not (List.mem (dev ^ partnum) pvs)
658 | LV _ -> assert false
661 eprintf "all_partitions: partitions after removing PVs: %s\n%!"
662 (String.concat "; " (List.map dev_of_partition parts));
664 (* Concatenate LVs & Parts *)
667 (* Try to determine the nature of each partition.
668 * Root? Swap? Architecture? etc.
670 let all_partitions : (partition * nature) list =
671 (* Output of 'file' command for Linux swap file. *)
672 let swap = Pcre.regexp "Linux.*swap.*file" in
673 (* Contents of /etc/redhat-release. *)
674 let rhel = Pcre.regexp "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)(?:\\.(\\d+))?" in
675 let fedora = Pcre.regexp "Fedora.*release (\\d+)" in
676 (* Contents of /etc/debian_version. *)
677 let debian = Pcre.regexp "^(\\d+)\\.(\\d+)" in
678 (* Output of 'file' on certain executables. *)
679 let i386 = Pcre.regexp ", Intel 80386," in
680 let x86_64 = Pcre.regexp ", x86-64," in
681 let itanic = Pcre.regexp ", IA-64," in
683 (* Examine the filesystem mounted on 'mnt' to determine the
684 * operating system, and, if Linux, the distro.
687 if is_dir (mnt ^ "/Windows") = Some true &&
688 is_file (mnt ^ "/autoexec.bat") = Some true then
690 else if is_dir (mnt ^ "/etc") = Some true &&
691 is_dir (mnt ^ "/sbin") = Some true &&
692 is_dir (mnt ^ "/var") = Some true then (
693 if is_file (mnt ^ "/etc/redhat-release") = Some true then (
694 let chan = open_in (mnt ^ "/etc/redhat-release") in
695 let lines = input_all_lines chan in
699 | [] -> (* empty /etc/redhat-release ...? *)
700 LinuxRoot (UnknownArch, OtherLinux)
701 | line::_ -> (* try to detect OS from /etc/redhat-release *)
703 let subs = Pcre.exec ~rex:rhel line in
704 let major = int_of_string (Pcre.get_substring subs 1) in
706 try int_of_string (Pcre.get_substring subs 2)
707 with Not_found -> 0 in
708 LinuxRoot (UnknownArch, RHEL (major, minor))
710 Not_found | Failure "int_of_string" ->
712 let subs = Pcre.exec ~rex:fedora line in
713 let version = int_of_string (Pcre.get_substring subs 1) in
714 LinuxRoot (UnknownArch, Fedora version)
716 Not_found | Failure "int_of_string" ->
717 LinuxRoot (UnknownArch, OtherLinux)
719 else if is_file (mnt ^ "/etc/debian_version") = Some true then (
720 let chan = open_in (mnt ^ "/etc/debian_version") in
721 let lines = input_all_lines chan in
725 | [] -> (* empty /etc/debian_version ...? *)
726 LinuxRoot (UnknownArch, OtherLinux)
727 | line::_ -> (* try to detect version from /etc/debian_version *)
729 let subs = Pcre.exec ~rex:debian line in
730 let major = int_of_string (Pcre.get_substring subs 1) in
731 let minor = int_of_string (Pcre.get_substring subs 2) in
732 LinuxRoot (UnknownArch, Debian (major, minor))
734 Not_found | Failure "int_of_string" ->
735 LinuxRoot (UnknownArch, OtherLinux)
738 LinuxRoot (UnknownArch, OtherLinux)
739 ) else if is_dir (mnt ^ "/grub") = Some true &&
740 is_file (mnt ^ "/grub/stage1") = Some true then (
743 NotRoot (* mountable, but not a root filesystem *)
746 (* Examine the Linux root filesystem mounted on 'mnt' to
747 * determine the architecture. We do this by looking at some
748 * well-known binaries that we expect to be there.
750 let detect_architecture mnt =
751 let cmd = "file -bL " ^ quote (mnt ^ "/sbin/init") in
753 | Some (str::_) when Pcre.pmatch ~rex:i386 str -> I386
754 | Some (str::_) when Pcre.pmatch ~rex:x86_64 str -> X86_64
755 | Some (str::_) when Pcre.pmatch ~rex:itanic str -> IA64
761 let dev = dev_of_partition part in (* Get /dev device. *)
764 (* Use 'file' command to detect if it is swap. *)
765 let cmd = "file -sbL " ^ quote dev in
767 | Some (str::_) when Pcre.pmatch ~rex:swap str -> LinuxSwap
769 (* Blindly try to mount the device. *)
770 let cmd = "mount -o ro " ^ quote dev ^ " /mnt/root" in
771 match shwithstatus cmd with
773 let os = detect_os "/mnt/root" in
776 | LinuxRoot (UnknownArch, distro) ->
777 let architecture = detect_architecture "/mnt/root" in
778 LinuxRoot (architecture, distro)
780 sh "umount /mnt/root";
783 | _ -> UnknownNature (* not mountable *)
787 eprintf "partition detection: %s is %s\n%!"
788 dev (string_of_nature nature);
794 printf "virt-p2v finished detecting hard drives\n%!";
797 let ask_greeting state =
798 ignore (msgbox "virt-p2v" "\nWelcome to virt-p2v, a live CD for migrating a physical machine to a virtualized host.\n\nTo continue press the Return key.\n\nTo get a shell you can use [ALT] [F2] and log in as root with no password.\n\nExtra information is logged in /tmp/virt-p2v.log but this file disappears when the machine reboots." 18 50);
802 let ask_hostname state =
804 inputbox "Remote host" "Remote host" 10 50
805 (Option.default "" state.remote_host)
807 | Yes [] -> Ask_again
808 | Yes (hostname::_) -> Next { state with remote_host = Some hostname }
809 | No | Help | Error -> Ask_again
815 inputbox "Remote port" "Remote port" 10 50
816 (Option.default "22" state.remote_port)
818 | Yes ([]|""::_) -> Next { state with remote_port = Some "22" }
819 | Yes (port::_) -> Next { state with remote_port = Some port }
820 | No | Help | Error -> Ask_again
824 let ask_directory state =
825 let default_dir = "/var/lib/xen/images" in
827 inputbox "Remote directory" "Remote directory" 10 50
828 (Option.default default_dir state.remote_directory)
830 | Yes ([]|""::_) -> Next { state with remote_directory = Some default_dir }
831 | Yes (dir::_) -> Next { state with remote_directory = Some dir }
832 | No | Help | Error -> Ask_again
836 let ask_username state =
837 let default_username = "root" in
839 inputbox "Remote username" "Remote username for ssh access to server" 10 50
840 (Option.default default_username state.remote_username)
843 Next { state with remote_username = Some default_username }
844 | Yes (user::_) -> Next { state with remote_username = Some user }
845 | No | Help | Error -> Ask_again
849 let ask_network state =
851 radiolist "Network configuration" "Network configuration" 12 50 4 [
852 "auto", "Automatic configuration", state.network = Some Auto;
853 "ask", "Ask for fixed IP address and gateway",
854 state.network = Some Static;
855 "sh", "Configure from the shell", state.network = Some Shell;
856 "qemu", "QEMU user network (for developers only)",
857 state.network = Some QEMUUserNet
860 | Yes ("auto"::_) -> Next { state with network = Some Auto }
861 | Yes ("ask"::_) -> Next { state with network = Some Static }
862 | Yes ("sh"::_) -> Next { state with network = Some Shell }
863 | Yes ("qemu"::_) -> Next { state with network = Some QEMUUserNet }
864 | Yes _ | No | Help | Error -> Ask_again
868 let ask_static_network_config state =
869 let interface, address, netmask, gateway, nameserver =
870 match state.static_network_config with
871 | Some (a,b,c,d,e) -> a,b,c,d,e
872 | None -> "eth0","","","","" in
874 form "Static network configuration" "Static network configuration"
876 "Interface", 1, 0, interface, 1, 12, 8, 0;
877 "Address", 2, 0, address, 2, 12, 16, 0;
878 "Netmask", 3, 0, netmask, 3, 12, 16, 0;
879 "Gateway", 4, 0, gateway, 4, 12, 16, 0;
880 "Nameserver", 5, 0, nameserver, 5, 12, 16, 0;
883 | Yes (interface::address::netmask::gateway::nameserver::_) ->
885 static_network_config = Some (interface, address, netmask,
886 gateway, nameserver) }
887 | Yes _ | No | Help | Error -> Ask_again
891 let ask_devices state =
892 let selected_devices = Option.default [] state.devices_to_send in
893 let devices = List.map (
894 fun (dev, blksize) ->
896 sprintf "/dev/%s (%.3f GB)" dev
897 ((Int64.to_float blksize) /. (1024.*.1024.*.1024.)),
898 List.mem dev selected_devices)
899 ) all_block_devices in
901 checklist "Devices" "Pick devices to send" 15 50 8 devices
903 | Yes [] | No | Help | Error -> Ask_again
904 | Yes devices -> Next { state with devices_to_send = Some devices }
909 let parts = List.mapi (
910 fun i (part, nature) ->
913 | LinuxSwap -> " (Linux swap)"
914 | LinuxRoot (_, RHEL (a,b)) -> sprintf " (RHEL %d.%d root)" a b
915 | LinuxRoot (_, Fedora v) -> sprintf " (Fedora %d root)" v
916 | LinuxRoot (_, Debian (a,b)) -> sprintf " (Debian %d.%d root)" a b
917 | LinuxRoot (_, OtherLinux) -> sprintf " (Linux root)"
918 | WindowsRoot -> " (Windows C:)"
919 | LinuxBoot -> " (Linux /boot)"
920 | NotRoot -> " (filesystem)"
921 | UnknownNature -> "" in
923 dev_of_partition part ^ descr,
924 Some part = state.root_filesystem)
927 radiolist "Root device"
928 "Pick partition containing the root (/) filesystem" 18 70 9
932 let (part, _) = List.nth all_partitions (int_of_string i) in
933 Next { state with root_filesystem = Some part }
934 | Yes [] | No | Help | Error -> Ask_again
938 let ask_hypervisor state =
940 radiolist "Hypervisor"
941 "Choose hypervisor / virtualization system"
943 "xen", "Xen", state.hypervisor = Some Xen;
944 "qemu", "QEMU", state.hypervisor = Some QEMU;
945 "kvm", "KVM", state.hypervisor = Some KVM;
946 "other", "Other", state.hypervisor = None
949 | Yes ("xen"::_) -> Next { state with hypervisor = Some Xen }
950 | Yes ("qemu"::_) -> Next { state with hypervisor = Some QEMU }
951 | Yes ("kvm"::_) -> Next { state with hypervisor = Some KVM }
952 | Yes _ -> Next { state with hypervisor = None }
953 | No | Help | Error -> Ask_again
957 let ask_architecture state =
959 radiolist "Architecture" "Machine architecture" 16 50 8 [
960 "i386", "i386 and up (32 bit)", state.architecture = Some I386;
961 "x86_64", "x86-64 (64 bit)", state.architecture = Some X86_64;
962 "ia64", "Itanium IA64", state.architecture = Some IA64;
963 "ppc", "PowerPC (32 bit)", state.architecture = Some PPC;
964 "ppc64", "PowerPC (64 bit)", state.architecture = Some PPC64;
965 "sparc", "SPARC (32 bit)", state.architecture = Some SPARC;
966 "sparc64", "SPARC (64 bit)", state.architecture = Some SPARC64;
967 "auto", "Auto-detect",
968 state.architecture = None || state.architecture = Some UnknownArch;
971 | Yes ("i386" :: _) -> Next { state with architecture = Some I386 }
972 | Yes ("x86_64" :: _) -> Next { state with architecture = Some X86_64 }
973 | Yes ("ia64" :: _) -> Next { state with architecture = Some IA64 }
974 | Yes ("ppc" :: _) -> Next { state with architecture = Some PPC }
975 | Yes ("ppc64" :: _) -> Next { state with architecture = Some PPC64 }
976 | Yes ("sparc" :: _) -> Next { state with architecture = Some SPARC }
977 | Yes ("sparc64" :: _) -> Next { state with architecture = Some SPARC64 }
978 | Yes _ -> Next { state with architecture = Some UnknownArch }
979 | No | Help | Error -> Ask_again
983 let ask_memory state =
985 inputbox "Memory" "Memory (MB). Leave blank to use same as physical server."
987 (Option.map_default string_of_int "" state.memory)
989 | Yes (""::_ | []) -> Next { state with memory = Some 0 }
991 let mem = try int_of_string mem with Failure "int_of_string" -> -1 in
992 if mem < 0 || (mem > 0 && mem < 64) then Ask_again
993 else Next { state with memory = Some mem }
994 | No | Help | Error -> Ask_again
998 let ask_vcpus state =
1000 inputbox "VCPUs" "Virtual CPUs. Leave blank to use same as physical server."
1002 (Option.map_default string_of_int "" state.vcpus)
1004 | Yes (""::_ | []) -> Next { state with vcpus = Some 0 }
1007 try int_of_string vcpus with Failure "int_of_string" -> -1 in
1008 if vcpus < 0 then Ask_again
1009 else Next { state with vcpus = Some vcpus }
1010 | No | Help | Error -> Ask_again
1014 let ask_mac_address state =
1016 inputbox "MAC address"
1017 "Network MAC address. Leave blank to use a random address." 10 50
1018 (Option.default "" state.mac_address)
1020 | Yes (""::_ | []) -> Next { state with mac_address = Some "" }
1021 | Yes (mac :: _) -> Next { state with mac_address = Some mac }
1022 | No | Help | Error -> Ask_again
1026 let ask_verify state =
1028 yesno "Verify and proceed"
1029 (sprintf "\nPlease verify the settings below and click [OK] to proceed, or the [Back] button to return to a previous step.
1041 (Option.default "" state.remote_host)
1042 (Option.default "" state.remote_port)
1043 (Option.default "" state.remote_directory)
1044 (match state.network with
1045 | Some Auto -> "Auto-configure" | Some Shell -> "Shell"
1046 | Some Static -> "Static" | Some QEMUUserNet -> "QEMU user net"
1048 (String.concat "," (Option.default [] state.devices_to_send))
1049 (Option.map_default dev_of_partition "" state.root_filesystem)
1050 (match state.hypervisor with
1051 | Some Xen -> "Xen" | Some QEMU -> "QEMU" | Some KVM -> "KVM"
1052 | None -> "Other / not set")
1053 (match state.architecture with
1054 | Some UnknownArch -> "Auto-detect"
1055 | Some arch -> string_of_architecture arch | None -> "")
1056 (match state.memory with
1057 | Some 0 -> "Same as physical"
1058 | Some mem -> string_of_int mem ^ " MB" | None -> "")
1059 (match state.vcpus with
1060 | Some 0 -> "Same as physical"
1061 | Some vcpus -> string_of_int vcpus | None -> "")
1062 (match state.mac_address with
1063 | Some "" -> "Random" | Some mac -> mac | None -> "")
1067 | Yes _ -> Next state
1069 | No | Help | Error -> Ask_again
1072 (* This is the list of dialogs, in order. The user can go forwards or
1073 * backwards through them.
1075 * The second parameter in each tuple is true if we need to skip
1076 * this dialog statically (info already supplied in 'defaults' above).
1078 * The third parameter in each tuple is a function that tests whether
1079 * this dialog should be skipped, given other parts of the current state.
1082 let dont_skip _ = false in
1084 ask_greeting, not defaults.greeting, dont_skip;
1085 ask_hostname, defaults.remote_host <> None, dont_skip;
1086 ask_port, defaults.remote_port <> None, dont_skip;
1087 ask_directory, defaults.remote_directory <> None, dont_skip;
1088 ask_username, defaults.remote_username <> None, dont_skip;
1089 ask_network, defaults.network <> None, dont_skip;
1090 ask_static_network_config,
1091 defaults.static_network_config <> None,
1092 (function { network = Some Static } -> false | _ -> true);
1093 ask_devices, defaults.devices_to_send <> None, dont_skip;
1094 ask_root, defaults.root_filesystem <> None, dont_skip;
1095 ask_hypervisor, defaults.hypervisor <> None, dont_skip;
1096 ask_architecture, defaults.architecture <> None, dont_skip;
1097 ask_memory, defaults.memory <> None, dont_skip;
1098 ask_vcpus, defaults.vcpus <> None, dont_skip;
1099 ask_mac_address, defaults.mac_address <> None, dont_skip;
1100 ask_verify, not defaults.greeting, dont_skip;
1103 (* Loop through the dialogs until we reach the end. *)
1104 let rec loop ?(back=false) posn state =
1105 eprintf "dialog loop: posn = %d, back = %b\n%!" posn back;
1106 if posn >= Array.length dlgs then state (* Finished all dialogs. *)
1107 else if posn < 0 then loop 0 state
1109 let dlg, skip_static, skip_dynamic = dlgs.(posn) in
1110 if skip_static || skip_dynamic state then
1111 (* Skip this dialog. *)
1112 loop ~back (if back then posn-1 else posn+1) state
1115 match dlg state with
1116 | Next new_state -> loop (posn+1) new_state (* Forwards. *)
1117 | Ask_again -> loop posn state (* Repeat the question. *)
1118 | Prev -> loop ~back:true (posn-1) state (* Backwards / back button. *)
1122 let state = loop 0 defaults in
1124 eprintf "finished dialog loop\n%!";
1126 (* Switch LVM config. *)
1128 putenv "LVM_SYSTEM_DIR" "/etc/lvm.new"; (* see lvm(8) *)
1129 sh "rm -f /etc/lvm/cache/.cache";
1130 sh "rm -f /etc/lvm.new/cache/.cache";
1132 (* Snapshot the block devices to send. *)
1133 let devices_to_send = Option.get state.devices_to_send in
1134 let devices_to_send =
1137 let snapshot_dev = snapshot_name origin_dev in
1138 snapshot origin_dev snapshot_dev;
1139 (origin_dev, snapshot_dev)
1140 ) devices_to_send in
1142 (* Run kpartx on the snapshots. *)
1144 fun (origin, snapshot) ->
1145 shfailok ("kpartx -a " ^ quote ("/dev/mapper/" ^ snapshot))
1148 (* Rescan for LVs. *)
1152 (* Mount the root filesystem under /mnt/root. *)
1153 let root_filesystem = Option.get state.root_filesystem in
1154 (match root_filesystem with
1155 | Part (dev, partnum) ->
1156 let dev = dev ^ partnum in
1157 let snapshot_dev = snapshot_name dev in
1158 sh ("mount " ^ quote ("/dev/mapper/" ^ snapshot_dev) ^ " /mnt/root")
1161 (* The LV will be backed by a snapshot device, so just mount
1164 sh ("mount " ^ quote ("/dev/" ^ vg ^ "/" ^ lv) ^ " /mnt/root")
1167 (* See if we can do network configuration. *)
1168 let network = Option.get state.network in
1171 printf "Network configuration.\n\n";
1172 printf "Please configure the network from this shell.\n\n";
1173 printf "When you have finished, exit the shell with ^D or exit.\n\n%!";
1177 printf "Trying static network configuration.\n\n%!";
1178 if not (static_network state) then (
1179 printf "\nAuto-configuration failed. Starting a shell.\n\n";
1180 printf "Please configure the network from this shell.\n\n";
1181 printf "When you have finished, exit the shell with ^D or exit.\n\n";
1187 "Trying network auto-configuration from root filesystem ...\n\n%!";
1188 if not (auto_network state) then (
1189 printf "\nAuto-configuration failed. Starting a shell.\n\n";
1190 printf "Please configure the network from this shell.\n\n";
1191 printf "When you have finished, exit the shell with ^D or exit.\n\n";
1195 printf "Trying QEMU network configuration.\n\n%!";
1199 (* Work out what devices will be called at the remote end. *)
1200 let devices_to_send = List.map (
1201 fun (origin_dev, snapshot_dev) ->
1202 let remote_dev = remote_of_origin_dev origin_dev in
1203 (origin_dev, snapshot_dev, remote_dev)
1204 ) devices_to_send in
1206 (* Modify files on the root filesystem. *)
1207 rewrite_fstab state devices_to_send;
1208 (* XXX Other files to rewrite? *)
1210 (* Unmount the root filesystem and sync disks. *)
1211 sh "umount /mnt/root";
1212 sh "sync"; (* Ugh, should be in stdlib. *)
1214 (* Get architecture of root filesystem, detected previously. *)
1215 let system_architecture =
1217 (match List.assoc root_filesystem all_partitions with
1218 | LinuxRoot (arch, _) -> arch
1219 | _ -> raise Not_found
1223 (* None was detected before, so assume same as live CD. *)
1224 let arch = shget "uname -m" in
1226 | Some (("i386"|"i486"|"i586"|"i686")::_) -> I386
1227 | Some ("x86_64"::_) -> X86_64
1228 | Some ("ia64"::_) -> IA64
1229 | _ -> I386 (* probably wrong XXX *) in
1231 (* Autodetect system memory. *)
1233 let mem = shget "head -1 /proc/meminfo | awk '{print $2/1024}'" in
1235 | Some (mem::_) -> int_of_float (float_of_string mem)
1238 (* Autodetect system # pCPUs. *)
1239 let system_nr_cpus =
1241 shget "grep ^processor /proc/cpuinfo | tail -1 | awk '{print $3+1}'" in
1243 | Some (cpus::_) -> int_of_string cpus
1246 let remote_host = Option.get state.remote_host in
1247 let remote_port = Option.get state.remote_port in
1248 let remote_directory = Option.get state.remote_directory in
1249 let remote_username = Option.get state.remote_username in
1251 (* Functions to connect and disconnect from the remote system. *)
1252 let do_connect remote_name _ =
1253 let cmd = sprintf "ssh -C -l %s -p %s %s \"cat > %s/%s\""
1254 (quote remote_username) (quote remote_port) (quote remote_host)
1255 (quote remote_directory) (quote remote_name) in
1256 eprintf "connect: %s\n%!" cmd;
1257 let chan = open_process_out cmd in
1258 descr_of_out_channel chan, chan
1260 let do_disconnect (_, chan) =
1261 match close_process_out chan with
1262 | WEXITED 0 -> () (* OK *)
1263 | WEXITED i -> failwith (sprintf "ssh: exited with error code %d" i)
1264 | WSIGNALED i -> failwith (sprintf "ssh: killed by signal %d" i)
1265 | WSTOPPED i -> failwith (sprintf "ssh: stopped by signal %d" i)
1268 (* XXX This is using the hostname derived from network configuration
1269 * above. We might want to ask the user to choose.
1271 let hostname = safe_name (gethostname ()) in
1273 let date = sprintf "%04d%02d%02d%02d%02d"
1274 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min in
1275 "p2v-" ^ hostname ^ "-" ^ date in
1277 (* Work out what the image filenames will be at the remote end. *)
1278 let devices_to_send = List.map (
1279 fun (origin_dev, snapshot_dev, remote_dev) ->
1280 let remote_name = basename ^ "-" ^ remote_dev ^ ".img" in
1281 (origin_dev, snapshot_dev, remote_dev, remote_name)
1282 ) devices_to_send in
1284 (* Write a configuration file. Not sure if this is any better than
1285 * just 'sprintf-ing' bits of XML text together, but at least we will
1286 * always get well-formed XML.
1288 * XXX For some of the stuff here we really should do a
1289 * virConnectGetCapabilities call to the remote host first.
1291 * XXX There is a case for using virt-install to generate this XML.
1292 * When we start to incorporate libvirt access & storage API this
1293 * needs to be rethought.
1295 let conf_filename = basename ^ ".conf" in
1298 match state.architecture with
1299 | Some UnknownArch | None -> system_architecture
1300 | Some arch -> arch in
1302 match state.memory with
1303 | Some 0 | None -> system_memory
1304 | Some memory -> memory in
1306 match state.vcpus with
1307 | Some 0 | None -> system_nr_cpus
1310 match state.mac_address with
1311 | Some "" | None -> random_mac_address ()
1312 | Some mac -> mac in
1315 (* Shortcut to make "<name>value</name>". *)
1316 let leaf name value = Xml.Element (name, [], [Xml.PCData value]) in
1317 (* ... and the _other_ sort of leaf (god I hate XML). *)
1318 let tleaf name attribs = Xml.Element (name, attribs, []) in
1320 (* Standard stuff for every domain. *)
1321 let name = leaf "name" hostname in
1322 let uuid = leaf "uuid" (random_uuid ()) in
1323 let maxmem = leaf "maxmem" (string_of_int (memory * 1024)) in
1324 let memory = leaf "memory" (string_of_int (memory * 1024)) in
1325 let vcpu = leaf "vcpu" (string_of_int vcpus) in
1327 (* Top-level stuff which differs for each HV type (isn't this supposed
1328 * to be portable ...)
1331 match state.hypervisor with
1333 [Xml.Element ("os", [],
1335 leaf "loader" "/usr/lib/xen/boot/hvmloader";
1336 tleaf "boot" ["dev", "hd"]]);
1337 Xml.Element ("features", [],
1341 tleaf "clock" ["sync", "localtime"]]
1343 [Xml.Element ("os", [], [leaf "type" "hvm"]);
1344 tleaf "clock" ["sync", "localtime"]]
1346 [Xml.Element ("os", [],
1347 [Xml.Element ("type",
1349 string_of_architecture architecture;
1351 [Xml.PCData "hvm"]);
1352 tleaf "boot" ["dev", "hd"]])]
1356 (* <devices> section. *)
1359 match state.hypervisor with
1361 [leaf "emulator" "/usr/lib64/xen/bin/qemu-dm"] (* XXX lib64? *)
1363 [leaf "emulator" "/usr/bin/qemu"]
1365 [leaf "emulator" "/usr/bin/qemu-kvm"]
1369 Xml.Element ("interface", ["type", "user"],
1370 [tleaf "mac" ["address", mac_address]]) in
1371 (* XXX should have an option for Xen bridging:
1373 "interface", ["type","bridge"],
1374 [tleaf "source" ["bridge","xenbr0"];
1375 tleaf "mac" ["address",mac_address];
1376 tleaf "script" ["path","vif-bridge"]])*)
1377 let graphics = tleaf "graphics" ["type", "vnc"] in
1379 let disks = List.map (
1380 fun (_, _, remote_dev, remote_name) ->
1382 "disk", ["type", "file";
1384 [tleaf "source" ["file", remote_directory ^ "/" ^ remote_name];
1385 tleaf "target" ["dev", remote_dev]]
1387 ) devices_to_send in
1391 emulator @ interface :: graphics :: disks
1394 (* Put it all together in <domain type='foo'>. *)
1397 (match state.hypervisor with
1398 | Some Xen -> ["type", "xen"]
1399 | Some QEMU -> ["type", "qemu"]
1400 | Some KVM -> ["type", "kvm"]
1402 name :: uuid :: memory :: maxmem :: vcpu :: extras @ [devices]
1405 (* Convert XML configuration file to a string, then send it to the
1409 let xml = Xml.to_string_fmt xml in
1412 match state.hypervisor with
1413 | Some Xen | None -> ""
1414 | Some QEMU | Some KVM -> " -c qemu:///system" in
1415 let xml = sprintf "\
1417 This is a libvirt configuration file.
1419 To start the domain, do:
1422 -->\n\n" conn_arg conf_filename conn_arg hostname ^ xml in
1424 let xml_len = String.length xml in
1425 eprintf "length of configuration file is %d bytes\n%!" xml_len;
1427 let (sock,_) as conn = do_connect conf_filename (Int64.of_int xml_len) in
1428 (* In OCaml this actually loops calling write(2) *)
1429 ignore (write sock xml 0 xml_len);
1430 do_disconnect conn in
1432 (* Send the device snapshots to the remote host. *)
1433 (* XXX This code should be made more robust against both network
1434 * errors and local I/O errors. Also should allow the user several
1435 * attempts to connect, or let them go back to the dialog stage.
1438 fun (origin_dev, snapshot_dev, remote_dev, remote_name) ->
1439 eprintf "sending %s as %s\n%!" origin_dev remote_name;
1442 try List.assoc origin_dev all_block_devices
1443 with Not_found -> assert false (* internal error *) in
1445 printf "Sending /dev/%s (%.3f GB) to remote machine\n%!" origin_dev
1446 ((Int64.to_float size) /. (1024.*.1024.*.1024.));
1448 (* Open the snapshot device. *)
1449 let fd = openfile ("/dev/mapper/" ^ snapshot_dev) [O_RDONLY] 0 in
1452 let (sock,_) as conn = do_connect remote_name size in
1454 (* Copy the data. *)
1455 let bufsize = 1024 * 1024 in
1456 let buffer = String.create bufsize in
1457 let start = gettimeofday () in
1459 let rec copy bytes_sent last_printed_at =
1460 let n = read fd buffer 0 bufsize in
1462 ignore (write sock buffer 0 n);
1464 let bytes_sent = Int64.add bytes_sent (Int64.of_int n) in
1465 let last_printed_at =
1466 let now = gettimeofday () in
1467 (* Print progress every few seconds. *)
1468 if now -. last_printed_at > 5. then (
1469 let elapsed = Int64.to_float bytes_sent /. Int64.to_float size in
1470 let secs_elapsed = now -. start in
1471 printf "%.0f%%" (100. *. elapsed);
1472 (* After 60 seconds has elapsed, start printing estimates. *)
1473 if secs_elapsed >= 60. then (
1474 let remaining = 1. -. elapsed in
1475 let secs_remaining = (remaining /. elapsed) *. secs_elapsed in
1476 if secs_remaining > 120. then
1477 printf " (about %.0f minutes remaining) "
1478 (secs_remaining /. 60.)
1480 printf " (about %.0f seconds remaining) "
1486 else last_printed_at in
1488 copy bytes_sent last_printed_at
1497 (* Clean up and reboot. *)
1499 msgbox "virt-p2v completed"
1500 (sprintf "\nThe physical to virtual migration is complete.\n\nPlease verify the disk image(s) and configuration file on the remote host, and then start up the virtual machine by doing:\n\ncd %s\nvirsh define %s\n\nWhen you press [OK] this machine will reboot."
1501 remote_directory conf_filename)
1510 eprintf "usage: virt-p2v [--test] [ttyname]\n%!";
1513 (* Make sure that exceptions from 'main' get printed out on stdout
1514 * as well as stderr, since stderr is probably redirected to the
1515 * logfile, and so not visible to the user.
1517 let handle_exn f arg =
1519 with exn -> print_endline (Printexc.to_string exn); raise exn
1521 (* Test harness for the Makefile. The Makefile invokes this script as
1522 * 'virt-p2v --test' just to check it compiles. When it is running
1523 * from the actual live CD, there is a single parameter which is the
1524 * tty name (so usually 'virt-p2v tty1').
1527 match Array.to_list Sys.argv with
1528 | [ _; ("--help"|"-help"|"-?"|"-h") ] -> usage ();
1529 | [ _; "--test" ] -> () (* Makefile test - do nothing. *)
1530 | [ _; ttyname ] -> (* Run main with ttyname. *)
1531 handle_exn main (Some ttyname)
1532 | [ _ ] -> (* Interactive - no ttyname. *)
1533 handle_exn main None
1536 (* This file must end with a newline *)