[Libguestfs] [PATCH RFC] New API: btrfs_convert

[Pino Tsao]

   Signed-off-by: Pino <caoj.fnst at cn.fujitsu.com>
---
 daemon/btrfs.c       | 29 +++++++++++++++++++++++++++++
 generator/actions.ml | 18 ++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/daemon/btrfs.c b/daemon/btrfs.c
index 39392f7..7f10792 100644
--- a/daemon/btrfs.c
+++ b/daemon/btrfs.c
@@ -38,6 +38,7 @@ GUESTFSD_EXT_CMD(str_btrfsck, btrfsck);
 GUESTFSD_EXT_CMD(str_mkfs_btrfs, mkfs.btrfs);
 GUESTFSD_EXT_CMD(str_umount, umount);
 GUESTFSD_EXT_CMD(str_btrfsimage, btrfs-image);
+GUESTFSD_EXT_CMD(str_btrfsconvert, btrfs-convert);
 
 int
 optgroup_btrfs_available (void)
@@ -2083,3 +2084,31 @@ do_btrfs_image (char *const *sources, const char *image,
 
   return 0;
 }
+
+int
+do_btrfs_convert (const char *device, int rollback)
+{
+  const size_t MAX_ARGS = 64;
+  const char *argv[MAX_ARGS];
+  size_t i = 0;
+  CLEANUP_FREE char *err = NULL;
+  CLEANUP_FREE char *out = NULL;
+  int r;
+
+  ADD_ARG (argv, i, str_btrfsconvert);
+  ADD_ARG (argv, i, device);
+
+  if ((optargs_bitmask & GUESTFS_BTRFS_CONVERT_ROLLBACK_BITMASK) && rollback)
+    ADD_ARG (argv, i, "-r");
+
+  ADD_ARG (argv, i, NULL);
+
+  r = commandv (&out, &err, argv);
+  if (r == -1) {
+      reply_with_error ("%s: %s", device, err);
+      return -1;
+    }
+
+  return 0;
+}
+
diff --git a/generator/actions.ml b/generator/actions.ml
index 1a89869..8c83480 100644
--- a/generator/actions.ml
+++ b/generator/actions.ml
@@ -12579,6 +12579,24 @@ numbered C<partnum> on device C<device>.
 
 It returns C<primary>, C<logical>, or C<extended>." };
 
+  { defaults with
+    name = "btrfs_convert";
+    style = RErr, [Device "device"], [OBool "rollback"];
+    proc_nr = Some 455;
+    optional = Some "btrfs"; camel_name = "BTRFSConvert";
+    tests = [
+      InitEmpty, Always, TestRun (
+         [["mkfs"; "ext2"; "/dev/sda"; ""; "NOARG"; ""; ""; "NOARG"];
+         ["btrfs_convert"; "/dev/sda"; ""];
+         ["btrfs_convert"; "/dev/sda"; "true"]]), []
+    ];    
+    shortdesc = "convert from ext2/3/4 filesystem to btrfs or rollback";
+    longdesc = "\
+This is used to convert existed ext2/3/4 to btrfs filesystem, and the original
+filesystem image is accessible as from separate subvolume named ext2_saved as file image.
+
+If you want to rollback to ext2/3/4, set rollback to true." };
+
 ]
 
 (* Non-API meta-commands available only in guestfish.
-- 
2.1.0