Libguestfs - Apr 2018 - [PATCH 0/2] Support for expanding f2fs partitions

Hi,

this small patch series exposes one of the utility in f2fs-tools, and
use it to expand f2fs partitions in virt-resize.

Thanks,

Pino Toscano (2):
  New API: f2fs_expand
  resize: expand f2fs partitions

 daemon/Makefile.am        |  1 +
 daemon/f2fs.c             | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 generator/actions_core.ml |  9 +++++++++
 generator/proc_nr.ml      |  1 +
 lib/MAX_PROC_NR           |  2 +-
 resize/resize.ml          | 12 ++++++++++--
 6 files changed, 71 insertions(+), 3 deletions(-)
 create mode 100644 daemon/f2fs.c

-- 
2.14.3

Expose the resize.f2fs utility from f2fs-tools, to expand a f2fs
filesystem.
---
 daemon/Makefile.am        |  1 +
 daemon/f2fs.c             | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 generator/actions_core.ml |  9 +++++++++
 generator/proc_nr.ml      |  1 +
 lib/MAX_PROC_NR           |  2 +-
 5 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 daemon/f2fs.c

diff --git a/daemon/Makefile.am b/daemon/Makefile.am
index ba5d8deed..5df41fd79 100644
--- a/daemon/Makefile.am
+++ b/daemon/Makefile.am
@@ -113,6 +113,7 @@ guestfsd_SOURCES = \
 	du.c \
 	echo-daemon.c \
 	ext2.c \
+	f2fs.c \
 	fallocate.c \
 	file.c \
 	fill.c \
diff --git a/daemon/f2fs.c b/daemon/f2fs.c
new file mode 100644
index 000000000..74108a3b1
--- /dev/null
+++ b/daemon/f2fs.c
@@ -0,0 +1,49 @@
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2018 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.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "daemon.h"
+#include "actions.h"
+#include "optgroups.h"
+
+int
+optgroup_f2fs_available (void)
+{
+  return prog_exists ("resize.f2fs");
+}
+
+int
+do_f2fs_expand (const char *device)
+{
+  CLEANUP_FREE char *err = NULL;
+  int r;
+
+  r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
+                "resize.f2fs", device, NULL);
+  if (r == -1) {
+    reply_with_error ("%s", err);
+    return -1;
+  }
+
+  return 0;
+}
diff --git a/generator/actions_core.ml b/generator/actions_core.ml
index 544cb6ea7..394576398 100644
--- a/generator/actions_core.ml
+++ b/generator/actions_core.ml
@@ -9708,4 +9708,13 @@ When growing a partition you will want to grow the
filesystem
 afterwards, but when shrinking, you need to shrink the filesystem
 before the partition." };
 
+  { defaults with
+    name = "f2fs_expand"; added = (1, 39, 3);
+    style = RErr, [String (Device, "device")], [];
+    optional = Some "f2fs";
+    shortdesc = "expand a f2fs filesystem";
+    longdesc = "\
+This expands a f2fs filesystem to match the size of the underlying
+device." };
+
 ]
diff --git a/generator/proc_nr.ml b/generator/proc_nr.ml
index 9e16ab14a..ca73aa361 100644
--- a/generator/proc_nr.ml
+++ b/generator/proc_nr.ml
@@ -512,6 +512,7 @@ let proc_nr = [
 502, "inspect_get_drive_mappings";
 503, "part_set_gpt_attributes";
 504, "part_get_gpt_attributes";
+505, "f2fs_expand";
 ]
 
 (* End of list.  If adding a new entry, add it at the end of the list
diff --git a/lib/MAX_PROC_NR b/lib/MAX_PROC_NR
index 3091e8eea..f573e999a 100644
--- a/lib/MAX_PROC_NR
+++ b/lib/MAX_PROC_NR
@@ -1 +1 @@
-504
+505
-- 
2.14.3

Use resize.f2fs (via f2fs_expand) to expand f2fs filesystems, if
available.
---
 resize/resize.ml | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/resize/resize.ml b/resize/resize.ml
index 1a21e4dff..8e4bb1b16 100644
--- a/resize/resize.ml
+++ b/resize/resize.ml
@@ -136,7 +136,7 @@ let debug_logvol lv  
 type expand_content_method    | PVResize | Resize2fs | NTFSResize |
BtrfsFilesystemResize | XFSGrowFS
-  | Mkswap
+  | Mkswap | ResizeF2fs
 
 let string_of_expand_content_method = function
   | PVResize -> s_"pvresize"
@@ -145,6 +145,7 @@ let string_of_expand_content_method = function
   | BtrfsFilesystemResize -> s_"btrfs-filesystem-resize"
   | XFSGrowFS -> s_"xfs_growfs"
   | Mkswap -> s_"mkswap"
+  | ResizeF2fs -> s_"resize.f2fs"
 
 type unknown_filesystems_mode    | UnknownFsIgnore
@@ -295,6 +296,8 @@ read the man page virt-resize(1).
         printf "btrfs\n";
       if g#feature_available [| "xfs" |] then
         printf "xfs\n";
+      if g#feature_available [| "f2fs" |] then
+        printf "f2fs\n";
       exit 0
     );
 
@@ -331,10 +334,11 @@ read the man page virt-resize(1).
     lv_expands, machine_readable, ntfsresize_force, output_format,
     resizes, resizes_force, shrink, sparse, unknown_fs_mode in
 
-  (* Default to true, since NTFS/btrfs/XFS support are usually available. *)
+  (* Default to true, since NTFS/btrfs/XFS/f2fs support are usually available.
*)
   let ntfs_available = ref true in
   let btrfs_available = ref true in
   let xfs_available = ref true in
+  let f2fs_available = ref true in
 
   (* Add a drive to an handle using the elements of the URI,
    * and few additional parameters.
@@ -364,6 +368,7 @@ read the man page virt-resize(1).
     ntfs_available := g#feature_available [|"ntfsprogs";
"ntfs3g"|];
     btrfs_available := g#feature_available [|"btrfs"|];
     xfs_available := g#feature_available [|"xfs"|];
+    f2fs_available := g#feature_available [|"f2fs"|];
 
     g
   in
@@ -585,6 +590,7 @@ read the man page virt-resize(1).
       | ContentFS (("ntfs"), _) when !ntfs_available -> true
       | ContentFS (("btrfs"), _) when !btrfs_available -> true
       | ContentFS (("xfs"), _) when !xfs_available -> true
+      | ContentFS (("f2fs"), _) when !f2fs_available -> true
       | ContentFS _ -> false
       | ContentExtendedPartition -> false
       | ContentSwap -> true
@@ -600,6 +606,7 @@ read the man page virt-resize(1).
       | ContentFS (("ntfs"), _) when !ntfs_available -> NTFSResize
       | ContentFS (("btrfs"), _) when !btrfs_available ->
BtrfsFilesystemResize
       | ContentFS (("xfs"), _) when !xfs_available -> XFSGrowFS
+      | ContentFS (("f2fs"), _) when !f2fs_available -> ResizeF2fs
       | ContentFS _ -> assert false
       | ContentExtendedPartition -> assert false
       | ContentSwap -> Mkswap
@@ -1368,6 +1375,7 @@ read the man page virt-resize(1).
         if new_uuid <> orig_uuid then
           warning (f_"UUID in swap partition %s changed from ‘%s’ to
‘%s’")
             target orig_uuid new_uuid;
+      | ResizeF2fs -> g#f2fs_expand target
     in
 
     (* Expand partition content as required. *)
-- 
2.14.3

Use resize.f2fs (via f2fs_expand) to expand f2fs filesystems, if
available.
---
 resize/resize.ml       | 12 ++++++++++--
 resize/virt-resize.pod | 10 ++++++++--
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/resize/resize.ml b/resize/resize.ml
index 1a21e4dff..8e4bb1b16 100644
--- a/resize/resize.ml
+++ b/resize/resize.ml
@@ -136,7 +136,7 @@ let debug_logvol lv  
 type expand_content_method    | PVResize | Resize2fs | NTFSResize |
BtrfsFilesystemResize | XFSGrowFS
-  | Mkswap
+  | Mkswap | ResizeF2fs
 
 let string_of_expand_content_method = function
   | PVResize -> s_"pvresize"
@@ -145,6 +145,7 @@ let string_of_expand_content_method = function
   | BtrfsFilesystemResize -> s_"btrfs-filesystem-resize"
   | XFSGrowFS -> s_"xfs_growfs"
   | Mkswap -> s_"mkswap"
+  | ResizeF2fs -> s_"resize.f2fs"
 
 type unknown_filesystems_mode    | UnknownFsIgnore
@@ -295,6 +296,8 @@ read the man page virt-resize(1).
         printf "btrfs\n";
       if g#feature_available [| "xfs" |] then
         printf "xfs\n";
+      if g#feature_available [| "f2fs" |] then
+        printf "f2fs\n";
       exit 0
     );
 
@@ -331,10 +334,11 @@ read the man page virt-resize(1).
     lv_expands, machine_readable, ntfsresize_force, output_format,
     resizes, resizes_force, shrink, sparse, unknown_fs_mode in
 
-  (* Default to true, since NTFS/btrfs/XFS support are usually available. *)
+  (* Default to true, since NTFS/btrfs/XFS/f2fs support are usually available.
*)
   let ntfs_available = ref true in
   let btrfs_available = ref true in
   let xfs_available = ref true in
+  let f2fs_available = ref true in
 
   (* Add a drive to an handle using the elements of the URI,
    * and few additional parameters.
@@ -364,6 +368,7 @@ read the man page virt-resize(1).
     ntfs_available := g#feature_available [|"ntfsprogs";
"ntfs3g"|];
     btrfs_available := g#feature_available [|"btrfs"|];
     xfs_available := g#feature_available [|"xfs"|];
+    f2fs_available := g#feature_available [|"f2fs"|];
 
     g
   in
@@ -585,6 +590,7 @@ read the man page virt-resize(1).
       | ContentFS (("ntfs"), _) when !ntfs_available -> true
       | ContentFS (("btrfs"), _) when !btrfs_available -> true
       | ContentFS (("xfs"), _) when !xfs_available -> true
+      | ContentFS (("f2fs"), _) when !f2fs_available -> true
       | ContentFS _ -> false
       | ContentExtendedPartition -> false
       | ContentSwap -> true
@@ -600,6 +606,7 @@ read the man page virt-resize(1).
       | ContentFS (("ntfs"), _) when !ntfs_available -> NTFSResize
       | ContentFS (("btrfs"), _) when !btrfs_available ->
BtrfsFilesystemResize
       | ContentFS (("xfs"), _) when !xfs_available -> XFSGrowFS
+      | ContentFS (("f2fs"), _) when !f2fs_available -> ResizeF2fs
       | ContentFS _ -> assert false
       | ContentExtendedPartition -> assert false
       | ContentSwap -> Mkswap
@@ -1368,6 +1375,7 @@ read the man page virt-resize(1).
         if new_uuid <> orig_uuid then
           warning (f_"UUID in swap partition %s changed from ‘%s’ to
‘%s’")
             target orig_uuid new_uuid;
+      | ResizeF2fs -> g#f2fs_expand target
     in
 
     (* Expand partition content as required. *)
diff --git a/resize/virt-resize.pod b/resize/virt-resize.pod
index f6aeb5706..720318c4d 100644
--- a/resize/virt-resize.pod
+++ b/resize/virt-resize.pod
@@ -156,7 +156,8 @@ to fill the rest of the available space:
 If the expanded partition in the image contains a filesystem or LVM
 PV, then if virt-resize knows how, it will resize the contents, the
 equivalent of calling a command such as L<pvresize(8)>,
-L<resize2fs(8)>, L<ntfsresize(8)>, L<btrfs(8)> or
L<xfs_growfs(8)>.
+L<resize2fs(8)>, L<ntfsresize(8)>, L<btrfs(8)>,
L<xfs_growfs(8)>,
+or L<resize.f2fs(8)>.
 However virt-resize does not know how to resize some filesystems, so
 you would have to online resize them after booting the guest.
 
@@ -407,6 +408,10 @@ Please note that libguestfs I<destroys> the existing
swap content
 by recreating it with C<mkswap>, so this should not be used when
 the guest is suspended.
 
+=item *
+
+f2fs filesystems, if libguestfs was compiled with support for f2fs.
+
 =back
 
 Note that you cannot use I<--expand> and I<--shrink> together.
@@ -775,7 +780,7 @@ This may be due to either of the following:
 
 There corresponding filesystem is not available in libguestfs,
 because there is no proper package in the host with utilities for it.
-This is usually the case for C<btrfs>, C<ntfs>, and C<xfs>
+This is usually the case for C<btrfs>, C<ntfs>, C<xfs>, and
C<f2fs>
 filesystems.
 
 Check the results of:
@@ -842,6 +847,7 @@ L<resize2fs(8)>,
 L<ntfsresize(8)>,
 L<btrfs(8)>,
 L<xfs_growfs(8)>,
+L<resize.f2fs(8)>,
 L<virsh(1)>,
 L<parted(8)>,
 L<truncate(1)>,
-- 
2.14.3

ACK series.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-builder quickly builds VMs from scratch
http://libguestfs.org/virt-builder.1.html