X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=slave.ml;h=01105ef8700c143eadb89f83c684a3ccadb0f8f4;hb=f09bb82de01019f24411cac2916d9567b5e9a235;hp=d1cff80b5064f165b1a8050dabab55171d3203eb;hpb=b07102fda0034da5840a9f33bd6d404a195b8cc9;p=guestfs-browser.git
diff --git a/slave.ml b/slave.ml
index d1cff80..01105ef 100644
--- a/slave.ml
+++ b/slave.ml
@@ -17,9 +17,14 @@
*)
open ExtList
-open Printf
+open ExtString
+open CamomileLibrary
+open Default.Camomile
+
open Utils
+open Printf
+
module C = Libvirt.Connect
module Cond = Condition
module D = Libvirt.Domain
@@ -32,12 +37,14 @@ type 'a callback = 'a -> unit
(* The commands. *)
type command =
| Exit_thread
- | Connect of string option * unit callback
- | Get_domains of domain list callback
- | Open_domain of string * rw_flag callback
- | Open_images of string list * rw_flag callback
- | Get_volumes of volume callback
- | Read_directory of string * string * direntry list callback
+ | Connect of string option * domain list callback
+ | Disk_usage of source * string * int64 callback
+ | Download_dir_find0 of source * string * string * unit callback
+ | Download_dir_tarball of source * string * download_dir_tarball_format * string * unit callback
+ | Download_file of source * string * string * unit callback
+ | Open_domain of string * inspection_data callback
+ | Open_images of (string * string option) list * inspection_data callback
+ | Read_directory of source * string * direntry list callback
and domain = {
dom_id : int;
@@ -45,44 +52,96 @@ and domain = {
dom_state : D.state;
}
-and rw_flag = RO | RW
+and inspection_data = {
+ insp_all_filesystems : (string * string) list;
+ insp_oses : inspection_os list;
+}
-and volume = {
- vol_device : string;
- vol_type : string;
- vol_label : string;
- vol_uuid : string;
- vol_statvfs : Guestfs.statvfs;
+and inspection_os = {
+ insp_root : string;
+ insp_arch : string;
+ insp_distro : string;
+ insp_filesystems : string array;
+ insp_hostname : string;
+ insp_major_version : int;
+ insp_minor_version : int;
+ insp_mountpoints : (string * string) list;
+ insp_package_format : string;
+ insp_package_management : string;
+ insp_product_name : string;
+ insp_type : string;
+ insp_windows_systemroot : string option;
+ insp_winreg_DEFAULT : string option;
+ insp_winreg_SAM : string option;
+ insp_winreg_SECURITY : string option;
+ insp_winreg_SOFTWARE : string option;
+ insp_winreg_SYSTEM : string option;
}
+and source = OS of inspection_os | Volume of string
+
and direntry = {
dent_name : string;
- dent_stat : Guestfs.stat;
+ dent_stat : G.stat;
dent_link : string;
}
-let string_of_command = function
+and download_dir_tarball_format = Tar | TGZ | TXZ
+
+let rec string_of_command = function
| Exit_thread -> "Exit_thread"
| Connect (Some name, _) -> sprintf "Connect %s" name
| Connect (None, _) -> "Connect NULL"
- | Get_domains _ -> "Get_domains"
+ | Disk_usage (src, remotedir, _) ->
+ sprintf "Disk_usage (%s, %s)" (string_of_source src) remotedir
+ | Download_dir_find0 (src, remotedir, localfile, _) ->
+ sprintf "Download_dir_find0 (%s, %s, %s)"
+ (string_of_source src) remotedir localfile
+ | Download_dir_tarball (src, remotedir, format, localfile, _) ->
+ sprintf "Download_dir_tarball (%s, %s, %s, %s)"
+ (string_of_source src) remotedir
+ (string_of_download_dir_tarball_format format) localfile
+ | Download_file (src, remotefile, localfile, _) ->
+ sprintf "Download_file (%s, %s, %s)"
+ (string_of_source src) remotefile localfile
| Open_domain (name, _) -> sprintf "Open_domain %s" name
| Open_images (images, _) ->
- sprintf "Open_images [%s]" (String.concat "; " images)
- | Get_volumes _ -> "Get_volumes"
- | Read_directory (dev, dir, _) -> sprintf "Read_directory %s %s" dev dir
-
-let string_of_rw_flag = function RO -> "RO" | RW -> "RW"
+ sprintf "Open_images %s" (string_of_images images)
+ | Read_directory (src, dir, _) ->
+ sprintf "Read_directory (%s, %s)" (string_of_source src) dir
+
+and string_of_images images =
+ "[" ^
+ String.concat "; "
+ (List.map (function
+ | fn, None -> fn
+ | fn, Some format -> sprintf "%s (%s)" fn format)
+ images) ^ "]"
+
+and string_of_source = function
+ | OS { insp_root = root } ->
+ sprintf "OS %s" root
+ | Volume dev ->
+ sprintf "Volume %s" dev
+
+and string_of_download_dir_tarball_format = function
+ | Tar -> "Tar"
+ | TGZ -> "TGZ"
+ | TXZ -> "TXZ"
let no_callback _ = ()
let failure_hook = ref (fun _ -> ())
let busy_hook = ref (fun _ -> ())
let idle_hook = ref (fun _ -> ())
+let status_hook = ref (fun _ -> ())
+let progress_hook = ref (fun _ -> ())
let set_failure_hook cb = failure_hook := cb
let set_busy_hook cb = busy_hook := cb
let set_idle_hook cb = idle_hook := cb
+let set_status_hook cb = status_hook := cb
+let set_progress_hook cb = progress_hook := cb
(* Execute a function, while holding a mutex. If the function
* fails, ensure we release the mutex before rethrowing the
@@ -98,26 +157,41 @@ let with_lock m f =
(* The queue of commands, and a lock and condition to protect it. *)
let q = Q.create ()
+let q_discard = ref false
let q_lock = M.create ()
let q_cond = Cond.create ()
(* Send a command message to the slave thread. *)
-let send_to_slave cmd =
+let send_to_slave ?fail cmd =
debug "sending message %s to slave thread ..." (string_of_command cmd);
with_lock q_lock (
fun () ->
- Q.push cmd q;
+ Q.push (fail, cmd) q;
Cond.signal q_cond
)
-let discard_command_queue () = with_lock q_lock (fun () -> Q.clear q)
+let discard_command_queue () =
+ with_lock q_lock (
+ fun () ->
+ Q.clear q;
+ (* Discard the currently running command. *)
+ q_discard := true
+ )
-let connect uri cb = send_to_slave (Connect (uri, cb))
-let get_domains cb = send_to_slave (Get_domains cb)
-let get_volumes cb = send_to_slave (Get_volumes cb)
-let open_domain name cb = send_to_slave (Open_domain (name, cb))
-let open_images images cb = send_to_slave (Open_images (images, cb))
-let read_directory dev dir cb = send_to_slave (Read_directory (dev, dir, cb))
+let connect ?fail uri cb = send_to_slave ?fail (Connect (uri, cb))
+let disk_usage ?fail src remotedir cb =
+ send_to_slave ?fail (Disk_usage (src, remotedir, cb))
+let download_dir_find0 ?fail src remotedir localfile cb =
+ send_to_slave ?fail (Download_dir_find0 (src, remotedir, localfile, cb))
+let download_dir_tarball ?fail src remotedir format localfile cb =
+ send_to_slave ?fail
+ (Download_dir_tarball (src, remotedir, format, localfile, cb))
+let download_file ?fail src remotefile localfile cb =
+ send_to_slave ?fail (Download_file (src, remotefile, localfile, cb))
+let open_domain ?fail name cb = send_to_slave ?fail (Open_domain (name, cb))
+let open_images ?fail images cb = send_to_slave ?fail (Open_images (images, cb))
+let read_directory ?fail src path cb =
+ send_to_slave ?fail (Read_directory (src, path, cb))
(*----- Slave thread starts here -----*)
@@ -130,44 +204,69 @@ let quit = ref false
let conn = ref None
let g = ref None
-(* Call 'f ()' with 'dev' mounted read-only. Ensure that everything
+(* Run the callback unless someone set the q_discard flag while
+ * we were running the command.
+ *)
+let callback_if_not_discarded (cb : 'a callback) (arg : 'a) =
+ let discard = with_lock q_lock (fun () -> !q_discard) in
+ if not discard then
+ GtkThread.async cb arg
+
+(* Call 'f ()' with source mounted read-only. Ensure that everything
* is unmounted even if an exception is thrown.
*)
-let with_mount_ro g dev (f : unit -> 'a) : 'a =
- Std.finally (fun () -> G.umount_all g) (
+let with_mount_ro g src (f : unit -> 'a) : 'a =
+ Std.finally (fun () -> g#umount_all ()) (
fun () ->
- G.mount_ro g dev "/";
+ (* Do the mount - could be OS or single volume. *)
+ (match src with
+ | Volume dev -> g#mount_ro dev "/";
+ | OS { insp_mountpoints = mps } ->
+ (* Sort the mountpoint keys by length, shortest first. *)
+ let cmp (a,_) (b,_) = compare (String.length a) (String.length b) in
+ let mps = List.sort ~cmp mps in
+ (* Mount the filesystems. *)
+ List.iter (
+ fun (mp, dev) -> g#mount_ro dev mp
+ ) mps
+ );
f ()
) ()
+(* Update the status bar. *)
+let status fs =
+ let f str = GtkThread.async !status_hook str in
+ ksprintf f fs
+
let rec loop () =
+ debug "top of slave loop";
+
(* Get the next command. *)
- let cmd =
+ let fail, cmd =
with_lock q_lock (
fun () ->
- while Q.is_empty q do
- Cond.wait q_cond q_lock
- done;
+ while Q.is_empty q do Cond.wait q_cond q_lock done;
+ q_discard := false;
Q.pop q
) in
- debug "thread id %d: slave processing command %s ..."
- (Thread.id (Thread.self ())) (string_of_command cmd);
+ debug "slave processing command %s ..." (string_of_command cmd);
(try
GtkThread.async !busy_hook ();
- execute_command cmd;
+ execute_command cmd
with exn ->
- (* If a command fails, clear the command queue and run the
- * failure hook in the main thread.
+ (* If the user provided an override ?fail parameter to the
+ * original call, call that, else call the global hook.
*)
- discard_command_queue ();
- GtkThread.async !failure_hook exn
+ match fail with
+ | Some cb -> GtkThread.async cb exn
+ | None -> GtkThread.async !failure_hook exn
);
(* If there are no more commands in the queue, run the idle hook. *)
- let r = with_lock q_lock (fun () -> Q.is_empty q) in
- if r then GtkThread.async !idle_hook ();
+ let empty = with_lock q_lock (fun () -> Q.is_empty q) in
+ if empty then GtkThread.async !idle_hook ();
if !quit then Thread.exit ();
loop ()
@@ -178,11 +277,13 @@ and execute_command = function
close_all ()
| Connect (name, cb) ->
+ let printable_name =
+ match name with None -> "default hypervisor" | Some uri -> uri in
+ status "Connecting to %s ..." printable_name;
+
close_all ();
conn := Some (C.connect_readonly ?name ());
- GtkThread.async cb ()
- | Get_domains cb ->
let conn = get_conn () in
let doms = D.get_domains conn [D.ListAll] in
let doms = List.map (
@@ -191,49 +292,91 @@ and execute_command = function
dom_name = D.get_name d;
dom_state = (D.get_info d).D.state }
) doms in
- let cmp { dom_name = n1 } { dom_name = n2 } = compare n1 n2 in
+ let cmp { dom_name = n1 } { dom_name = n2 } = UTF8.compare n1 n2 in
let doms = List.sort ~cmp doms in
- GtkThread.async cb doms
+
+ status "Connected to %s" printable_name;
+ callback_if_not_discarded cb doms
+
+ | Disk_usage (src, remotedir, cb) ->
+ status "Calculating disk usage of %s ..." remotedir;
+
+ let g = get_g () in
+ let r =
+ with_mount_ro g src (
+ fun () ->
+ g#du remotedir
+ ) in
+
+ status "Finished calculating disk usage of %s" remotedir;
+ callback_if_not_discarded cb r
+
+ | Download_dir_find0 (src, remotedir, localfile, cb) ->
+ status "Downloading %s filenames to %s ..." remotedir localfile;
+
+ let g = get_g () in
+ with_mount_ro g src (
+ fun () ->
+ g#find0 remotedir localfile
+ );
+
+ status "Finished downloading %s" localfile;
+ callback_if_not_discarded cb ()
+
+ | Download_dir_tarball (src, remotedir, format, localfile, cb) ->
+ status "Downloading %s to %s ..." remotedir localfile;
+
+ let g = get_g () in
+ let f = match format with
+ | Tar -> g#tar_out
+ | TGZ -> g#tgz_out
+ | TXZ -> g#txz_out
+ in
+ with_mount_ro g src (
+ fun () ->
+ f remotedir localfile
+ );
+
+ status "Finished downloading %s" localfile;
+ callback_if_not_discarded cb ()
+
+ | Download_file (src, remotefile, localfile, cb) ->
+ status "Downloading %s to %s ..." remotefile localfile;
+
+ let g = get_g () in
+ with_mount_ro g src (
+ fun () ->
+ g#download remotefile localfile
+ );
+
+ status "Finished downloading %s" localfile;
+ callback_if_not_discarded cb ()
| Open_domain (name, cb) ->
+ status "Opening %s ..." name;
+
let conn = get_conn () in
let dom = D.lookup_by_name conn name in
- (* Only permit writes to shut off domains. This isn't foolproof
- * since the user could start up the domain while we're running,
- * which would cause disk corruption. Until we can negotiate a
- * feasible locking scheme with libvirt/qemu, this is the best we
- * can do.
- *)
- let rw = write_flag () && (D.get_info dom).D.state = D.InfoShutoff in
- let rw = if rw then RW else RO in
let xml = D.get_xml_desc dom in
let images = get_disk_images_from_xml xml in
- open_disk_images rw images cb
+ open_disk_images images cb
| Open_images (images, cb) ->
- let rw = write_flag () in
- let rw = if rw then RW else RO in
- open_disk_images rw images cb
+ status "Opening disk images ...";
+
+ open_disk_images images cb
+
+ | Read_directory (src, dir, cb) ->
+ status "Reading directory %s ..." dir;
- | Get_volumes cb ->
- let g = get_g () in
- (* Devices which directly contain filesystems (RHBZ#590167). *)
- let devices = G.list_devices g in
- Array.iter (if_mountable_vol g cb) devices;
- let partitions = G.list_partitions g in
- Array.iter (if_mountable_vol g cb) partitions;
- let lvs = G.lvs g in
- Array.iter (if_mountable_vol g cb) lvs
-
- | Read_directory (dev, dir, cb) ->
let g = get_g () in
let names, stats, links =
- with_mount_ro g dev (
+ with_mount_ro g src (
fun () ->
- let names = G.ls g dir in (* sorted and without . and .. *)
+ let names = g#ls dir in (* sorted and without . and .. *)
let names = Array.to_list names in
let stats = lstatlist_wrapper g dir names in
- let links = readlinklist_wrapper g dir names in
+ let links = readlink_wrapper g dir names stats in
names, stats, links
) in
assert (
@@ -245,7 +388,9 @@ and execute_command = function
fun ((name, stat), link) ->
{ dent_name = name; dent_stat = stat; dent_link = link }
) entries in
- GtkThread.async cb entries
+
+ status "Finished reading directory %s" dir;
+ callback_if_not_discarded cb entries
(* Expect to be connected, and return the current libvirt connection. *)
and get_conn () =
@@ -265,11 +410,13 @@ and close_all () =
close_g ()
and close_g () =
- (match !g with Some g -> G.close g | None -> ());
+ (match !g with Some g -> g#close () | None -> ());
g := None
and get_disk_images_from_xml xml =
let xml = Xml.parse_string xml in
+
+ (* Return the device nodes. *)
let devices =
match xml with
| Xml.Element ("domain", _, children) ->
@@ -282,20 +429,44 @@ and get_disk_images_from_xml xml =
List.concat devices
| _ ->
failwith "get_xml_desc didn't return " in
- let rec source_of = function (* *)
+
+ (* Look for and return attr_val. *)
+ let rec source_of attr_name = function
| [] -> None
| Xml.Element ("source", attrs, _) :: rest ->
- (try Some (List.assoc "dev" attrs)
- with Not_found ->
- try Some (List.assoc "file" attrs)
- with Not_found ->
- source_of rest)
- | _ :: rest -> source_of rest
+ (try Some (List.assoc attr_name attrs)
+ with Not_found -> source_of attr_name rest)
+ | _ :: rest -> source_of attr_name rest
in
+
+ (* Look for and return attr_val. *)
+ let rec format_of = function
+ | [] -> None
+ | Xml.Element ("driver", attrs, _) :: rest ->
+ (try Some (List.assoc "type" attrs)
+ with Not_found -> format_of rest)
+ | _ :: rest -> format_of rest
+ in
+
+ (* Look for nodes and return the sources (block devices) of those. *)
let blkdevs =
List.filter_map (
function
- | Xml.Element ("disk", _, children) -> source_of children
+ | Xml.Element ("disk", attrs, disks) ->
+ let filename =
+ try
+ let typ = List.assoc "type" attrs in
+ if typ = "file" then source_of "file" disks
+ else if typ = "block" then source_of "dev" disks
+ else None
+ with
+ Not_found -> None in
+ (match filename with
+ | None -> None
+ | Some filename ->
+ let format = format_of disks in
+ Some (filename, format)
+ );
| _ -> None
) devices in
blkdevs
@@ -303,44 +474,131 @@ and get_disk_images_from_xml xml =
(* The common code for Open_domain and Open_images which opens the
* libguestfs handle, adds the disks, and launches the appliance.
*)
-and open_disk_images rw images cb =
- debug "opening disk image [%s] in %s mode"
- (String.concat "; " images) (string_of_rw_flag rw);
+and open_disk_images images cb =
+ debug "opening disk image %s" (string_of_images images);
close_g ();
- let g' = G.create () in
+ let g' = new G.guestfs () in
g := Some g';
let g = g' in
- G.set_verbose g (verbose ());
-
- let add = (match rw with RO -> G.add_drive_ro | RW -> G.add_drive) g in
- List.iter add images;
+ g#set_trace (trace ());
+
+ (* Uncomment the next line to pass the verbose flag from the command
+ * line through to libguestfs. This is not generally necessary since
+ * we are not so interested in debugging libguestfs problems at this
+ * level, and the user can always set LIBGUESTFS_DEBUG=1 if they need
+ * to.
+ *)
+ (* g#set_verbose (verbose ());*)
+
+ (* Attach progress bar callback. *)
+ g#set_progress_callback (
+ fun proc_nr serial position total ->
+ debug "progress callback proc_nr=%d serial=%d posn=%Ld total=%Ld"
+ proc_nr serial position total;
+ GtkThread.async !progress_hook (position, total)
+ );
- G.launch g;
- GtkThread.async cb rw
+ List.iter (
+ function
+ | filename, None ->
+ g#add_drive_opts ~readonly:true filename
+ | filename, Some format ->
+ g#add_drive_opts ~readonly:true ~format filename
+ ) images;
+
+ g#launch ();
+
+ status "Listing filesystems ...";
+
+ (* Get list of filesystems. *)
+ let fses = g#list_filesystems () in
+
+ status "Looking for operating systems ...";
+
+ (* Perform inspection. This can fail, ignore errors. *)
+ let roots =
+ try Array.to_list (g#inspect_os ())
+ with
+ G.Error msg ->
+ debug "inspection failed (error ignored): %s" msg;
+ [] in
+
+ let oses = List.map (
+ fun root ->
+ let typ = g#inspect_get_type root in
+ let windows_systemroot =
+ if typ <> "windows" then None
+ else (
+ try Some (g#inspect_get_windows_systemroot root)
+ with G.Error _ -> None
+ ) in
-(* This is the common function implementing Get_volumes. Test if a
- * particular partition contains a mountable filesystem. We do this
- * simply by trying to mount it. If it does, get the rest of the
- * information for the volume, and call the callback.
- *)
-and if_mountable_vol g cb dev =
- try
- with_mount_ro g dev (
- fun () ->
- let vol_type = G.vfs_type g dev in
- let vol_label = G.vfs_label g dev in
- let vol_uuid = G.vfs_uuid g dev in
- let vol_statvfs = G.statvfs g "/" in
- let vol = {
- vol_device = dev; vol_type = vol_type; vol_label = vol_label;
- vol_uuid = vol_uuid; vol_statvfs = vol_statvfs
- } in
- GtkThread.async cb vol
- )
- with G.Error msg ->
- debug "is_mountable: %s: not mountable because: %s" dev msg
+ (* Create most of the OS object that we're going to return. We
+ * have to pass this to with_mount_ro below which is why we need
+ * to partially create it here.
+ *)
+ let os = {
+ insp_root = root;
+ insp_arch = g#inspect_get_arch root;
+ insp_distro = g#inspect_get_distro root;
+ insp_filesystems = g#inspect_get_filesystems root;
+ insp_hostname = g#inspect_get_hostname root;
+ insp_major_version = g#inspect_get_major_version root;
+ insp_minor_version = g#inspect_get_minor_version root;
+ insp_mountpoints = g#inspect_get_mountpoints root;
+ insp_package_format = g#inspect_get_package_format root;
+ insp_package_management = g#inspect_get_package_management root;
+ insp_product_name = g#inspect_get_product_name root;
+ insp_type = typ;
+ insp_windows_systemroot = windows_systemroot;
+ insp_winreg_DEFAULT = None; (* incomplete, see below *)
+ insp_winreg_SAM = None;
+ insp_winreg_SECURITY = None;
+ insp_winreg_SOFTWARE = None;
+ insp_winreg_SYSTEM = None;
+ } in
+
+ (* We need to mount the root in order to look for Registry hives. *)
+ let winreg_DEFAULT, winreg_SAM, winreg_SECURITY, winreg_SOFTWARE,
+ winreg_SYSTEM =
+ match windows_systemroot with
+ | None -> None, None, None, None, None
+ | Some sysroot ->
+ with_mount_ro g (OS os) (
+ fun () ->
+ let check_for_hive filename =
+ let path =
+ sprintf "%s/system32/config/%s" sysroot filename in
+ try Some (g#case_sensitive_path path)
+ with G.Error _ -> None
+ in
+ check_for_hive "default",
+ check_for_hive "sam",
+ check_for_hive "security",
+ check_for_hive "software",
+ check_for_hive "system"
+ ) in
+
+ (* Fill in the remaining struct fields. *)
+ let os = { os with
+ insp_winreg_DEFAULT = winreg_DEFAULT;
+ insp_winreg_SAM = winreg_SAM;
+ insp_winreg_SECURITY = winreg_SECURITY;
+ insp_winreg_SOFTWARE = winreg_SOFTWARE;
+ insp_winreg_SYSTEM = winreg_SYSTEM
+ } in
+ os
+ ) roots in
+
+ let data = {
+ insp_all_filesystems = fses;
+ insp_oses = oses;
+ } in
+
+ status "Finished opening disk";
+ callback_if_not_discarded cb data
(* guestfs_lstatlist has a "hidden" limit of the protocol message size.
* Call this function, but split the list of names into chunks.
@@ -349,18 +607,127 @@ and lstatlist_wrapper g dir = function
| [] -> []
| names ->
let names', names = List.take 1000 names, List.drop 1000 names in
- let xs = G.lstatlist g dir (Array.of_list names') in
+ let xs = g#lstatlist dir (Array.of_list names') in
let xs = Array.to_list xs in
xs @ lstatlist_wrapper g dir names
-(* Same as above for guestfs_readlinklist. *)
-and readlinklist_wrapper g dir = function
- | [] -> []
- | names ->
- let names', names = List.take 1000 names, List.drop 1000 names in
- let xs = G.readlinklist g dir (Array.of_list names') in
- let xs = Array.to_list xs in
- xs @ readlinklist_wrapper g dir names
+(* For each entry which is a symlink, read the destination of the
+ * symlink. This is non-trivial because on Windows we cannot use
+ * readlink but need to instead parse the reparse data from NTFS.
+ *)
+and readlink_wrapper g dir names stats =
+ (* Is the directory on an NTFS filesystem? *)
+ let dev = get_mounted_device g dir in
+ if g#vfs_type dev <> "ntfs" then (
+ (* Not NTFS, use the fast g#readlinklist method. *)
+ let rec readlinklist_wrapper g dir = function
+ | [] -> []
+ | names ->
+ let names', names = List.take 1000 names, List.drop 1000 names in
+ let xs = g#readlinklist dir (Array.of_list names') in
+ let xs = Array.to_list xs in
+ xs @ readlinklist_wrapper g dir names
+ in
+ readlinklist_wrapper g dir names
+ )
+ else (
+ (* NTFS: look up each symlink individually. *)
+ List.map (
+ fun (name, stat) ->
+ if not (is_symlink stat.G.mode) then ""
+ else
+ let path = if dir = "/" then dir ^ name else dir ^ "/" ^ name in
+ try
+ let _, display = get_ntfs_reparse_data g path in
+ display
+ with exn ->
+ debug "get_ntfs_reparse_data: %s: failed: %s"
+ path (Printexc.to_string exn);
+ "?"
+ ) (List.combine names stats)
+ )
+
+(* See:
+ * https://bugzilla.redhat.com/show_bug.cgi?id=663407
+ * http://git.annexia.org/?p=libguestfs.git;a=commit;h=3a3836b933b80c4f9f2c767fda4f8b459f998db2
+ * http://www.tuxera.com/community/ntfs-3g-advanced/junction-points-and-symbolic-links/
+ * http://www.tuxera.com/community/ntfs-3g-advanced/extended-attributes/
+ * http://www.codeproject.com/KB/winsdk/junctionpoints.aspx
+ *)
+and get_ntfs_reparse_data g path =
+ let data = g#lgetxattr path "system.ntfs_reparse_data" in
+ let link, display =
+ bitmatch Bitstring.bitstring_of_string data with
+ (* IO_REPARSE_TAG_MOUNT_POINT *)
+ | { 0xa0000003_l : 32 : littleendian;
+ _ : 16 : littleendian; (* data length - ignore it *)
+ _ : 16 : littleendian; (* reserved *)
+ link_offset : 16 : littleendian;
+ link_len : 16 : littleendian;
+ display_offset : 16 : littleendian;
+ display_len : 16 : littleendian;
+ link : link_len * 8 :
+ string, offset (8 * (link_offset + 0x10));
+ display : display_len * 8 :
+ string, offset (8 * (display_offset + 0x10)) } ->
+ (* These strings should always be valid UTF16LE, but the caller
+ * is prepared to catch any exception if this fails.
+ *)
+ let link = windows_string_to_utf8 link in
+ let display = windows_string_to_utf8 display in
+ link, display
+ | { 0xa0000003_l : 32 : littleendian } ->
+ invalid_arg (
+ sprintf "%s: could not parse IO_REPARSE_TAG_MOUNT_POINT data" path
+ )
+
+ (* IO_REPARSE_TAG_SYMLINK *)
+ | { 0xa000000c_l : 32 : littleendian;
+ _ : 16 : littleendian; (* data length - ignore it *)
+ _ : 16 : littleendian; (* reserved *)
+ link_offset : 16 : littleendian;
+ link_len : 16 : littleendian;
+ display_offset : 16 : littleendian;
+ display_len : 16 : littleendian;
+ link : link_len * 8 :
+ string, offset (8 * (link_offset + 0x14));
+ display : display_len * 8 :
+ string, offset (8 * (display_offset + 0x14)) } ->
+ let link = windows_string_to_utf8 link in
+ let display = windows_string_to_utf8 display in
+ link, display
+ | { 0xa000000c_l : 32 : littleendian } ->
+ invalid_arg (
+ sprintf "%s: could not parse IO_REPARSE_TAG_SYMLINK data" path
+ )
+
+ | { i : 32 : littleendian } ->
+ invalid_arg (
+ sprintf "%s: reparse data of type 0x%lx is not supported" path i
+ )
+ | { _ } ->
+ invalid_arg (sprintf "%s: reparse data is too short" path) in
+
+ link, display
+
+(* Given a path which is located somewhere on a mountpoint, return the
+ * device name. This works by using g#mountpoints and then looking for
+ * the mount path with the longest match.
+ *)
+and get_mounted_device g path =
+ let mps = g#mountpoints () in
+ let mps = List.map (
+ fun (dev, mp) ->
+ if String.starts_with path mp then dev, String.length mp else dev, 0
+ ) mps in
+ let cmp (_,n1) (_,n2) = compare n2 n1 in
+ let mps = List.sort ~cmp mps in
+ match mps with
+ | [] ->
+ invalid_arg (sprintf "%s: not mounted" path)
+ | (_,0) :: _ ->
+ invalid_arg (sprintf "%s: not found on any filesystem" path)
+ | (dev,_) :: _ -> dev
(* Start up one slave thread. *)
let slave_thread = Thread.create loop ()
@@ -368,5 +735,5 @@ let slave_thread = Thread.create loop ()
(* Note the following function is called from the main thread. *)
let exit_thread () =
discard_command_queue ();
- send_to_slave Exit_thread;
+ ignore (send_to_slave Exit_thread);
Thread.join slave_thread