+/* virt-alignment-scan
+ * Copyright (C) 2011 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 <stdint.h>
+#include <string.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <locale.h>
+#include <assert.h>
+#include <libintl.h>
+
+#ifdef HAVE_LIBVIRT
+#include <libvirt/libvirt.h>
+#include <libvirt/virterror.h>
+#endif
+
+#include "progname.h"
+#include "c-ctype.h"
+
+#include "guestfs.h"
+#include "options.h"
+
+/* These globals are shared with options.c. */
+guestfs_h *g;
+
+int read_only = 1;
+int live = 0;
+int verbose = 0;
+int keys_from_stdin = 0;
+int echo_keys = 0;
+const char *libvirt_uri = NULL;
+int inspector = 0;
+
+static int quiet = 0; /* --quiet */
+
+static int scan (void);
+
+static inline char *
+bad_cast (char const *s)
+{
+ return (char *) s;
+}
+
+static void __attribute__((noreturn))
+usage (int status)
+{
+ if (status != EXIT_SUCCESS)
+ fprintf (stderr, _("Try `%s --help' for more information.\n"),
+ program_name);
+ else {
+ fprintf (stdout,
+ _("%s: check alignment of virtual machine partitions\n"
+ "Copyright (C) 2011 Red Hat Inc.\n"
+ "Usage:\n"
+ " %s [--options] -d domname\n"
+ " %s [--options] -a disk.img [-a disk.img ...]\n"
+ "Options:\n"
+ " -a|--add image Add image\n"
+ " -c|--connect uri Specify libvirt URI for -d option\n"
+ " -d|--domain guest Add disks from libvirt guest\n"
+ " --format[=raw|..] Force disk format for -a option\n"
+ " --help Display brief help\n"
+ " -q|--quiet No output, just exit code\n"
+ " -v|--verbose Verbose messages\n"
+ " -V|--version Display version and exit\n"
+ " -x Trace libguestfs API calls\n"
+ "For more information, see the manpage %s(1).\n"),
+ program_name, program_name, program_name,
+ program_name);
+ }
+ exit (status);
+}
+
+int
+main (int argc, char *argv[])
+{
+ /* Set global program name that is not polluted with libtool artifacts. */
+ set_program_name (argv[0]);
+
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE, LOCALEBASEDIR);
+ textdomain (PACKAGE);
+
+ enum { HELP_OPTION = CHAR_MAX + 1 };
+
+ static const char *options = "a:c:d:qvVx";
+ static const struct option long_options[] = {
+ { "add", 1, 0, 'a' },
+ { "connect", 1, 0, 'c' },
+ { "domain", 1, 0, 'd' },
+ { "format", 2, 0, 0 },
+ { "help", 0, 0, HELP_OPTION },
+ { "quiet", 0, 0, 'q' },
+ { "verbose", 0, 0, 'v' },
+ { "version", 0, 0, 'V' },
+ { 0, 0, 0, 0 }
+ };
+ struct drv *drvs = NULL;
+ struct drv *drv;
+ const char *format = NULL;
+ int c;
+ int option_index;
+ int exit_code;
+
+ g = guestfs_create ();
+ if (g == NULL) {
+ fprintf (stderr, _("guestfs_create: failed to create handle\n"));
+ exit (EXIT_FAILURE);
+ }
+
+ argv[0] = bad_cast (program_name);
+
+ for (;;) {
+ c = getopt_long (argc, argv, options, long_options, &option_index);
+ if (c == -1) break;
+
+ switch (c) {
+ case 0: /* options which are long only */
+ if (STREQ (long_options[option_index].name, "format")) {
+ if (!optarg || STREQ (optarg, ""))
+ format = NULL;
+ else
+ format = optarg;
+ } else {
+ fprintf (stderr, _("%s: unknown long option: %s (%d)\n"),
+ program_name, long_options[option_index].name, option_index);
+ exit (EXIT_FAILURE);
+ }
+ break;
+
+ case 'a':
+ OPTION_a;
+ break;
+
+ case 'c':
+ OPTION_c;
+ break;
+
+ case 'd':
+ OPTION_d;
+ break;
+
+ case 'q':
+ quiet = 1;
+ break;
+
+ case 'v':
+ OPTION_v;
+ break;
+
+ case 'V':
+ OPTION_V;
+ break;
+
+ case 'x':
+ OPTION_x;
+ break;
+
+ case HELP_OPTION:
+ usage (EXIT_SUCCESS);
+
+ default:
+ usage (EXIT_FAILURE);
+ }
+ }
+
+ /* These are really constants, but they have to be variables for the
+ * options parsing code. Assert here that they have known-good
+ * values.
+ */
+ assert (read_only == 1);
+ assert (inspector == 0);
+ assert (live == 0);
+
+ /* Must be no extra arguments on the command line. */
+ if (optind != argc)
+ usage (EXIT_FAILURE);
+
+ /* The user didn't specify any drives to scan. */
+ if (drvs == NULL)
+ usage (EXIT_FAILURE);
+
+ /* Add domains/drives from the command line (for a single guest). */
+ add_drives (drvs, 'a');
+
+ if (guestfs_launch (g) == -1)
+ exit (EXIT_FAILURE);
+
+ /* Free up data structures, no longer needed after this point. */
+ free_drives (drvs);
+
+ /* Perform the scan. */
+ exit_code = scan ();
+
+ guestfs_close (g);
+
+ exit (exit_code);
+}
+
+static int
+scan (void)
+{
+ int exit_code = 0;
+ char **devices;
+ size_t i, j;
+ size_t alignment;
+ uint64_t start;
+ struct guestfs_partition_list *parts;
+
+ devices = guestfs_list_devices (g);
+
+ for (i = 0; devices[i] != NULL; ++i) {
+ parts = guestfs_part_list (g, devices[i]);
+
+ /* Canonicalize the name of the device for printing. */
+ if (STRPREFIX (devices[i], "/dev/") &&
+ (devices[i][5] == 'h' || devices[i][5] == 'v') &&
+ devices[i][6] == 'd' &&
+ c_isalpha (devices[i][7]))
+ devices[i][5] = 's';
+
+ for (j = 0; j < parts->len; ++j) {
+ /* Start offset of the partition in bytes. */
+ start = parts->val[j].part_start;
+
+ if (!quiet)
+ printf ("%s%d %12" PRIu64 " ",
+ devices[i], (int) parts->val[j].part_num, start);
+
+ /* What's the alignment? */
+ if (start == 0) /* Probably not possible, but anyway. */
+ alignment = 64;
+ else
+ for (alignment = 0; (start & 1) == 0; alignment++, start /= 2)
+ ;
+
+ if (!quiet) {
+ if (alignment < 10)
+ printf ("%12" PRIu64 " ", UINT64_C(1) << alignment);
+ else if (alignment < 64)
+ printf ("%12" PRIu64 "K ", UINT64_C(1) << (alignment - 10));
+ else
+ printf ("- ");
+ }
+
+ if (alignment < 12) { /* Bad in general: < 4K alignment */
+ exit_code = 3;
+ if (!quiet)
+ printf ("bad (%s)\n", _("alignment < 4K"));
+ } else if (alignment < 16) { /* Bad on NetApps: < 64K alignment */
+ if (exit_code < 2)
+ exit_code = 2;
+ if (!quiet)
+ printf ("bad (%s)\n", _("alignment < 64K"));
+ } else {
+ if (!quiet)
+ printf ("ok\n");
+ }
+ }
+
+ guestfs_free_partition_list (parts);
+ free (devices[i]);
+ }
+ free (devices);
+
+ return exit_code;
+}
git.annexia.org / libguestfs.git / commitdiff