fish: Add guestfish -N lv for creating disks with LVs.

1 files changed, 113 insertions, 0 deletions

diff --git a/fish/prep_lv.c b/fish/prep_lv.c
new file mode 100644
index 00000000..985d541f
--- /dev/null
+++ b/fish/prep_lv.c
@@ -0,0 +1,113 @@
+/* guestfish - the filesystem interactive shell
+ * Copyright (C) 2010 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "fish.h"
+#include "prepopts.h"
+
+/* Split "/dev/VG/LV" into "VG" and "LV".  This function should
+ * probably do more checks.
+ */
+static int
+vg_lv_parse (const char *device, char **vg, char **lv)
+{
+  if (STRPREFIX (device, "/dev/"))
+    device += 5;
+
+  const char *p = strchr (device, '/');
+  if (p == NULL)
+    return -1;
+
+  if (vg) {
+    *vg = strndup (device, p - device);
+    if (*vg == NULL) {
+      perror ("strndup");
+      exit (EXIT_FAILURE);
+    }
+  }
+
+  if (lv) {
+    *lv = strdup (p+1);
+    if (*lv == NULL) {
+      perror ("strndup");
+      exit (EXIT_FAILURE);
+    }
+  }
+
+  return 0;
+}
+
+void
+prep_prelaunch_lv (const char *filename, prep_data *data)
+{
+  if (vg_lv_parse (data->params[0], NULL, NULL) == -1)
+    prep_error (data, filename, _("incorrect format for LV name, use '/dev/VG/LV'"));
+
+  if (alloc_disk (filename, data->params[1], 0, 1) == -1)
+    prep_error (data, filename, _("failed to allocate disk"));
+}
+
+void
+prep_postlaunch_lv (const char *filename, prep_data *data, const char *device)
+{
+  if (guestfs_part_disk (g, device, data->params[2]) == -1)
+    prep_error (data, filename, _("failed to partition disk: %s"),
+                guestfs_last_error (g));
+
+  char *vg;
+  char *lv;
+  if (vg_lv_parse (data->params[0], &vg, &lv) == -1)
+    prep_error (data, filename, _("incorrect format for LV name, use '/dev/VG/LV'"));
+
+  char *part;
+  if (asprintf (&part, "%s1", device) == -1) {
+    perror ("asprintf");
+    exit (EXIT_FAILURE);
+  }
+
+  if (guestfs_pvcreate (g, part) == -1)
+    prep_error (data, filename, _("failed to create PV: %s: %s"),
+                part, guestfs_last_error (g));
+
+  char *parts[] = { part, NULL };
+  if (guestfs_vgcreate (g, vg, parts) == -1)
+    prep_error (data, filename, _("failed to create VG: %s: %s"),
+                vg, guestfs_last_error (g));
+
+  /* Create the smallest possible LV, then resize it to fill
+   * all available space.
+   */
+  if (guestfs_lvcreate (g, lv, vg, 1) == -1)
+    prep_error (data, filename, _("failed to create LV: /dev/%s/%s: %s"),
+                vg, lv, guestfs_last_error (g));
+  if (guestfs_lvresize_free (g, data->params[0], 100) == -1)
+    prep_error (data, filename,
+                _("failed to resize LV to full size: %s: %s"),
+                data->params[0], guestfs_last_error (g));
+
+  free (part);
+  free (vg);
+  free (lv);
+}