1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include "optgroups.h"
33 optgroup_lvm2_available (void)
35 return prog_exists ("lvm");
38 /* LVM actions. Keep an eye on liblvm, although at the time
39 * of writing it hasn't progressed very far.
43 convert_lvm_output (char *out, const char *prefix)
47 int size = 0, alloc = 0;
54 pend = strchr (p, '\n'); /* Get the next line of output. */
60 while (*p && c_isspace (*p)) /* Skip any leading whitespace. */
63 /* Sigh, skip trailing whitespace too. "pvs", I'm looking at you. */
65 while (*p && c_isspace (p[len]))
68 if (!*p) { /* Empty line? Skip it. */
75 snprintf (buf, sizeof buf, "%s%s", prefix, p);
80 if (add_string (&r, &size, &alloc, str) == -1) {
90 if (add_string (&r, &size, &alloc, NULL) == -1)
93 sort_strings (r, size-1);
103 r = command (&out, &err,
104 "lvm", "pvs", "-o", "pv_name", "--noheadings", NULL);
106 reply_with_error ("%s", err);
114 return convert_lvm_output (out, NULL);
123 r = command (&out, &err,
124 "lvm", "vgs", "-o", "vg_name", "--noheadings", NULL);
126 reply_with_error ("%s", err);
134 return convert_lvm_output (out, NULL);
143 r = command (&out, &err,
145 "-o", "vg_name,lv_name", "--noheadings",
146 "--separator", "/", NULL);
148 reply_with_error ("%s", err);
156 return convert_lvm_output (out, "/dev/");
159 /* These were so complex to implement that I ended up auto-generating
160 * the code. That code is in stubs.c, and it is generated as usual
163 guestfs_int_lvm_pv_list *
166 return parse_command_line_pvs ();
169 guestfs_int_lvm_vg_list *
172 return parse_command_line_vgs ();
175 guestfs_int_lvm_lv_list *
178 return parse_command_line_lvs ();
182 do_pvcreate (const char *device)
187 r = command (NULL, &err,
188 "lvm", "pvcreate", device, NULL);
190 reply_with_error ("%s", err);
203 do_vgcreate (const char *volgroup, char *const *physvols)
209 argc = count_strings (physvols) + 3;
210 argv = malloc (sizeof (char *) * (argc + 1));
212 reply_with_perror ("malloc");
216 argv[1] = "vgcreate";
218 for (i = 3; i <= argc; ++i)
219 argv[i] = physvols[i-3];
221 r = commandv (NULL, &err, (const char * const*) argv);
223 reply_with_error ("%s", err);
236 do_lvcreate (const char *logvol, const char *volgroup, int mbytes)
242 snprintf (size, sizeof size, "%d", mbytes);
244 r = command (NULL, &err,
246 "-L", size, "-n", logvol, volgroup, NULL);
248 reply_with_error ("%s", err);
261 do_lvresize (const char *logvol, int mbytes)
267 snprintf (size, sizeof size, "%d", mbytes);
269 r = command (NULL, &err,
271 "--force", "-L", size, logvol, NULL);
273 reply_with_error ("%s", err);
283 do_lvresize_free (const char *logvol, int percent)
288 if (percent < 0 || percent > 100) {
289 reply_with_error ("percentage must be [0..100] (was %d)", percent);
294 snprintf (size, sizeof size, "+%d%%FREE", percent);
296 r = command (NULL, &err,
297 "lvm", "lvresize", "-l", size, logvol, NULL);
299 reply_with_error ("%s", err);
308 /* Super-dangerous command used for testing. It removes all
309 * LVs, VGs and PVs permanently.
312 do_lvm_remove_all (void)
323 for (i = 0; xs[i] != NULL; ++i) {
324 r = command (NULL, &err, "lvm", "lvremove", "-f", xs[i], NULL);
326 reply_with_error ("lvremove: %s: %s", xs[i], err);
340 for (i = 0; xs[i] != NULL; ++i) {
341 r = command (NULL, &err, "lvm", "vgremove", "-f", xs[i], NULL);
343 reply_with_error ("vgremove: %s: %s", xs[i], err);
357 for (i = 0; xs[i] != NULL; ++i) {
358 r = command (NULL, &err, "lvm", "pvremove", "-f", xs[i], NULL);
360 reply_with_error ("pvremove: %s: %s", xs[i], err);
371 /* There, that was easy, sorry about your data. */
376 do_lvremove (const char *device)
381 r = command (NULL, &err,
382 "lvm", "lvremove", "-f", device, NULL);
384 reply_with_error ("%s", err);
397 do_vgremove (const char *device)
402 r = command (NULL, &err,
403 "lvm", "vgremove", "-f", device, NULL);
405 reply_with_error ("%s", err);
418 do_pvremove (const char *device)
423 r = command (NULL, &err,
424 "lvm", "pvremove", "-ff", device, NULL);
426 reply_with_error ("%s", err);
439 do_pvresize (const char *device)
444 r = command (NULL, &err,
445 "lvm", "pvresize", device, NULL);
447 reply_with_error ("%s: %s", device, err);
457 do_pvresize_size (const char *device, int64_t size)
463 snprintf (buf, sizeof buf, "%" PRIi64 "b", size);
465 r = command (NULL, &err,
467 "--setphysicalvolumesize", buf,
470 reply_with_error ("%s: %s", device, err);
480 do_vg_activate (int activate, char *const *volgroups)
486 argc = count_strings (volgroups) + 4;
487 argv = malloc (sizeof (char *) * (argc+1));
489 reply_with_perror ("malloc");
494 argv[1] = "vgchange";
496 argv[3] = activate ? "y" : "n";
497 for (i = 4; i <= argc; ++i)
498 argv[i] = volgroups[i-4];
500 r = commandv (NULL, &err, (const char * const*) argv);
502 reply_with_error ("vgchange: %s", err);
515 do_vg_activate_all (int activate)
517 char *empty[] = { NULL };
518 return do_vg_activate (activate, empty);
522 do_lvrename (const char *logvol, const char *newlogvol)
527 r = command (NULL, &err,
529 logvol, newlogvol, NULL);
531 reply_with_error ("%s -> %s: %s", logvol, newlogvol, err);
544 do_vgrename (const char *volgroup, const char *newvolgroup)
549 r = command (NULL, &err,
551 volgroup, newvolgroup, NULL);
553 reply_with_error ("%s -> %s: %s", volgroup, newvolgroup, err);
566 get_lvm_field (const char *cmd, const char *field, const char *device)
570 int r = command (&out, &err,
572 "--unbuffered", "--noheadings", "-o", field,
575 reply_with_error ("%s: %s", device, err);
584 return out; /* Caller frees. */
588 do_pvuuid (const char *device)
590 return get_lvm_field ("pvs", "pv_uuid", device);
594 do_vguuid (const char *vgname)
596 return get_lvm_field ("vgs", "vg_uuid", vgname);
600 do_lvuuid (const char *device)
602 return get_lvm_field ("lvs", "lv_uuid", device);
606 get_lvm_fields (const char *cmd, const char *field, const char *device)
610 int r = command (&out, &err,
612 "--unbuffered", "--noheadings", "-o", field,
615 reply_with_error ("%s: %s", device, err);
623 char **ret = split_lines (out);
630 for (i = 0; ret[i] != NULL; ++i)
637 do_vgpvuuids (const char *vgname)
639 return get_lvm_fields ("vgs", "pv_uuid", vgname);
643 do_vglvuuids (const char *vgname)
645 return get_lvm_fields ("vgs", "lv_uuid", vgname);
654 r = command (NULL, &err,
655 "lvm", "vgscan", NULL);
657 reply_with_error ("%s", err);