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virt-v2v/SOURCES/0004-virt-v2v-i-vmx-Refactor-ssh-scp-code-into-a-new-modu.patch

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From cddd07669d18a5a848f82dbde27b84ef405ef9fa Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Mon, 15 Jan 2024 14:24:35 +0000
Subject: [PATCH] virt-v2v: -i vmx: Refactor ssh/scp code into a new module
This is a straight refactor of the existing code that handles ssh/scp
into a new module. In this commit I just copy the code around without
doing any cleanup; cleanup will follow in subsequent commits.
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
---
input/Makefile.am | 6 ++-
input/input_vmx.ml | 8 ++--
input/parse_domain_from_vmx.ml | 60 ++-----------------------
input/parse_domain_from_vmx.mli | 6 ---
input/ssh.ml | 78 +++++++++++++++++++++++++++++++++
input/ssh.mli | 34 ++++++++++++++
6 files changed, 123 insertions(+), 69 deletions(-)
create mode 100644 input/ssh.ml
create mode 100644 input/ssh.mli
diff --git a/input/Makefile.am b/input/Makefile.am
index de016d60..4153f878 100644
--- a/input/Makefile.am
+++ b/input/Makefile.am
@@ -39,6 +39,7 @@ SOURCES_MLI = \
parse_domain_from_vmx.mli \
parse_libvirt_xml.mli \
parse_vmx.mli \
+ ssh.mli \
vCenter.mli
SOURCES_ML = \
@@ -46,11 +47,12 @@ SOURCES_ML = \
parse_libvirt_xml.ml \
OVF.ml \
OVA.ml \
- parse_vmx.ml \
- parse_domain_from_vmx.ml \
nbdkit_curl.ml \
nbdkit_ssh.ml \
nbdkit_vddk.ml \
+ ssh.ml \
+ parse_vmx.ml \
+ parse_domain_from_vmx.ml \
vCenter.ml \
input.ml \
input_disk.ml \
diff --git a/input/input_vmx.ml b/input/input_vmx.ml
index eed8a433..bd20420c 100644
--- a/input/input_vmx.ml
+++ b/input/input_vmx.ml
@@ -79,21 +79,21 @@ module VMX = struct
let socket = sprintf "%s/in%d" dir i in
On_exit.unlink socket;
- let vmx_path = path_of_uri uri in
+ let vmx_path = Ssh.path_of_uri uri in
let abs_path = absolute_path_from_other_file vmx_path filename in
let flat_vmdk = PCRE.replace (PCRE.compile "\\.vmdk$")
"-flat.vmdk" abs_path in
(* RHBZ#1774386 *)
- if not (remote_file_exists uri flat_vmdk) then
+ if not (Ssh.remote_file_exists uri flat_vmdk) then
error (f_"This transport does not support guests with snapshots. \
Either collapse the snapshots for this guest and try \
the conversion again, or use one of the alternate \
conversion methods described in \
virt-v2v-input-vmware(1) section \"NOTES\".");
- let server = server_of_uri uri in
- let port = Option.map string_of_int (port_of_uri uri) in
+ let server = Ssh.server_of_uri uri in
+ let port = Option.map string_of_int (Ssh.port_of_uri uri) in
let user = uri.Xml.uri_user in
let password =
match options.input_password with
diff --git a/input/parse_domain_from_vmx.ml b/input/parse_domain_from_vmx.ml
index f24990f8..8cf5893c 100644
--- a/input/parse_domain_from_vmx.ml
+++ b/input/parse_domain_from_vmx.ml
@@ -51,61 +51,6 @@ let vmx_source_of_arg input_transport arg =
error (f_"vmx URI path component looks incorrect");
SSH uri
-(* Return various fields from the URI. The checks in vmx_source_of_arg
- * should ensure that none of these assertions fail.
- *)
-let port_of_uri { Xml.uri_port } =
- match uri_port with i when i <= 0 -> None | i -> Some i
-let server_of_uri { Xml.uri_server } =
- match uri_server with None -> assert false | Some s -> s
-let path_of_uri { Xml.uri_path } =
- match uri_path with None -> assert false | Some p -> p
-
-(* 'scp' a remote file into a temporary local file, returning the path
- * of the temporary local file.
- *)
-let scp_from_remote_to_temporary uri tmpdir filename =
- let localfile = tmpdir // filename in
-
- let cmd =
- sprintf "scp%s%s %s%s:%s %s"
- (if verbose () then "" else " -q")
- (match port_of_uri uri with
- | None -> ""
- | Some port -> sprintf " -P %d" port)
- (match uri.Xml.uri_user with
- | None -> ""
- | Some user -> quote user ^ "@")
- (quote (server_of_uri uri))
- (quote (path_of_uri uri))
- (quote localfile) in
- if verbose () then
- eprintf "%s\n%!" cmd;
- if Sys.command cmd <> 0 then
- error (f_"could not copy the VMX file from the remote server, \
- see earlier error messages");
- localfile
-
-(* Test if [path] exists on the remote server. *)
-let remote_file_exists uri path =
- let cmd =
- sprintf "ssh%s %s%s test -f %s"
- (match port_of_uri uri with
- | None -> ""
- | Some port -> sprintf " -p %d" port)
- (match uri.Xml.uri_user with
- | None -> ""
- | Some user -> quote user ^ "@")
- (quote (server_of_uri uri))
- (* Double quoting is necessary for 'ssh', first to protect
- * from the local shell, second to protect from the remote
- * shell. https://github.com/libguestfs/virt-v2v/issues/35#issuecomment-1741730963
- *)
- (quote (quote path)) in
- if verbose () then
- eprintf "%s\n%!" cmd;
- Sys.command cmd = 0
-
let rec find_disks vmx vmx_source =
(* Set the s_disk_id field to an incrementing number. *)
List.mapi
@@ -390,7 +335,8 @@ let parse_domain_from_vmx vmx_source =
match vmx_source with
| File filename -> Parse_vmx.parse_file filename
| SSH uri ->
- let filename = scp_from_remote_to_temporary uri tmpdir "source.vmx" in
+ let filename = Ssh.scp_from_remote_to_temporary uri tmpdir
+ "source.vmx" in
Parse_vmx.parse_file filename in
let name =
@@ -400,7 +346,7 @@ let parse_domain_from_vmx vmx_source =
warning (f_"no displayName key found in VMX file");
match vmx_source with
| File filename -> name_from_disk filename
- | SSH uri -> name_from_disk (path_of_uri uri) in
+ | SSH uri -> name_from_disk (Ssh.path_of_uri uri) in
let genid =
(* See: https://lists.nongnu.org/archive/html/qemu-devel/2018-07/msg02019.html *)
diff --git a/input/parse_domain_from_vmx.mli b/input/parse_domain_from_vmx.mli
index e354b32e..42f8100e 100644
--- a/input/parse_domain_from_vmx.mli
+++ b/input/parse_domain_from_vmx.mli
@@ -22,9 +22,3 @@ type vmx_source =
val vmx_source_of_arg : [`SSH] option -> string -> vmx_source
val parse_domain_from_vmx : vmx_source -> Types.source * string list
-
-(* XXX Exporting these is a hack. *)
-val path_of_uri : Xml.uri -> string
-val server_of_uri : Xml.uri -> string
-val port_of_uri : Xml.uri -> int option
-val remote_file_exists : Xml.uri -> string -> bool
diff --git a/input/ssh.ml b/input/ssh.ml
new file mode 100644
index 00000000..5e689d29
--- /dev/null
+++ b/input/ssh.ml
@@ -0,0 +1,78 @@
+(* virt-v2v
+ * Copyright (C) 2009-2024 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+open Std_utils
+open Tools_utils
+open Common_gettext.Gettext
+
+open Printf
+
+(* Return various fields from the URI. The checks in vmx_source_of_arg
+ * should ensure that none of these assertions fail.
+ *)
+let port_of_uri { Xml.uri_port } =
+ match uri_port with i when i <= 0 -> None | i -> Some i
+let server_of_uri { Xml.uri_server } =
+ match uri_server with None -> assert false | Some s -> s
+let path_of_uri { Xml.uri_path } =
+ match uri_path with None -> assert false | Some p -> p
+
+(* 'scp' a remote file into a temporary local file, returning the path
+ * of the temporary local file.
+ *)
+let scp_from_remote_to_temporary uri tmpdir filename =
+ let localfile = tmpdir // filename in
+
+ let cmd =
+ sprintf "scp%s%s %s%s:%s %s"
+ (if verbose () then "" else " -q")
+ (match port_of_uri uri with
+ | None -> ""
+ | Some port -> sprintf " -P %d" port)
+ (match uri.Xml.uri_user with
+ | None -> ""
+ | Some user -> quote user ^ "@")
+ (quote (server_of_uri uri))
+ (quote (path_of_uri uri))
+ (quote localfile) in
+ if verbose () then
+ eprintf "%s\n%!" cmd;
+ if Sys.command cmd <> 0 then
+ error (f_"could not copy the VMX file from the remote server, \
+ see earlier error messages");
+ localfile
+
+(* Test if [path] exists on the remote server. *)
+let remote_file_exists uri path =
+ let cmd =
+ sprintf "ssh%s %s%s test -f %s"
+ (match port_of_uri uri with
+ | None -> ""
+ | Some port -> sprintf " -p %d" port)
+ (match uri.Xml.uri_user with
+ | None -> ""
+ | Some user -> quote user ^ "@")
+ (quote (server_of_uri uri))
+ (* Double quoting is necessary for 'ssh', first to protect
+ * from the local shell, second to protect from the remote
+ * shell. https://github.com/libguestfs/virt-v2v/issues/35#issuecomment-1741730963
+ *)
+ (quote (quote path)) in
+ if verbose () then
+ eprintf "%s\n%!" cmd;
+ Sys.command cmd = 0
diff --git a/input/ssh.mli b/input/ssh.mli
new file mode 100644
index 00000000..e9a1a6a8
--- /dev/null
+++ b/input/ssh.mli
@@ -0,0 +1,34 @@
+(* virt-v2v
+ * Copyright (C) 2009-2024 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+(** Wrappers for finding and downloading remote files over ssh. *)
+
+val path_of_uri : Xml.uri -> string
+val server_of_uri : Xml.uri -> string
+val port_of_uri : Xml.uri -> int option
+
+(** [remote_file_exists ssh_uri path] checks that [path] exists
+ on the remote server [ssh_uri] (note any path inside [ssh_uri]
+ is ignored). *)
+val remote_file_exists : Xml.uri -> string -> bool
+
+(** [scp_from_remote_to_temporary ssh_uri tmpdir filename]
+ uses scp to copy the single remote file at [ssh_uri] to
+ the local file called [tmpdir/filename]. It returns the
+ final path [tmpdir/filename]. *)
+val scp_from_remote_to_temporary : Xml.uri -> string -> string -> string
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