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 /* LVM actions. Keep an eye on liblvm, although at the time
31 * of writing it hasn't progressed very far.
35 convert_lvm_output (char *out, const char *prefix)
39 int size = 0, alloc = 0;
46 pend = strchr (p, '\n'); /* Get the next line of output. */
52 while (*p && c_isspace (*p)) /* Skip any leading whitespace. */
55 /* Sigh, skip trailing whitespace too. "pvs", I'm looking at you. */
57 while (*p && c_isspace (p[len]))
60 if (!*p) { /* Empty line? Skip it. */
67 snprintf (buf, sizeof buf, "%s%s", prefix, p);
72 if (add_string (&r, &size, &alloc, str) == -1) {
82 if (add_string (&r, &size, &alloc, NULL) == -1)
85 sort_strings (r, size-1);
95 r = command (&out, &err,
96 "/sbin/lvm", "pvs", "-o", "pv_name", "--noheadings", NULL);
98 reply_with_error ("%s", err);
106 return convert_lvm_output (out, NULL);
115 r = command (&out, &err,
116 "/sbin/lvm", "vgs", "-o", "vg_name", "--noheadings", NULL);
118 reply_with_error ("%s", err);
126 return convert_lvm_output (out, NULL);
135 r = command (&out, &err,
137 "-o", "vg_name,lv_name", "--noheadings",
138 "--separator", "/", NULL);
140 reply_with_error ("%s", err);
148 return convert_lvm_output (out, "/dev/");
151 /* These were so complex to implement that I ended up auto-generating
152 * the code. That code is in stubs.c, and it is generated as usual
155 guestfs_int_lvm_pv_list *
158 return parse_command_line_pvs ();
161 guestfs_int_lvm_vg_list *
164 return parse_command_line_vgs ();
167 guestfs_int_lvm_lv_list *
170 return parse_command_line_lvs ();
174 do_pvcreate (const char *device)
179 r = command (NULL, &err,
180 "/sbin/lvm", "pvcreate", device, NULL);
182 reply_with_error ("%s", err);
195 do_vgcreate (const char *volgroup, char *const *physvols)
201 argc = count_strings (physvols) + 3;
202 argv = malloc (sizeof (char *) * (argc + 1));
204 reply_with_perror ("malloc");
207 argv[0] = "/sbin/lvm";
208 argv[1] = "vgcreate";
210 for (i = 3; i <= argc; ++i)
211 argv[i] = physvols[i-3];
213 r = commandv (NULL, &err, (char **) argv);
215 reply_with_error ("%s", err);
228 do_lvcreate (const char *logvol, const char *volgroup, int mbytes)
234 snprintf (size, sizeof size, "%d", mbytes);
236 r = command (NULL, &err,
237 "/sbin/lvm", "lvcreate",
238 "-L", size, "-n", logvol, volgroup, NULL);
240 reply_with_error ("%s", err);
253 do_lvresize (const char *logvol, int mbytes)
259 snprintf (size, sizeof size, "%d", mbytes);
261 r = command (NULL, &err,
262 "/sbin/lvm", "lvresize",
263 "-L", size, logvol, NULL);
265 reply_with_error ("lvresize: %s", err);
274 /* Super-dangerous command used for testing. It removes all
275 * LVs, VGs and PVs permanently.
278 do_lvm_remove_all (void)
289 for (i = 0; xs[i] != NULL; ++i) {
290 r = command (NULL, &err, "/sbin/lvm", "lvremove", "-f", xs[i], NULL);
292 reply_with_error ("lvremove: %s: %s", xs[i], err);
306 for (i = 0; xs[i] != NULL; ++i) {
307 r = command (NULL, &err, "/sbin/lvm", "vgremove", "-f", xs[i], NULL);
309 reply_with_error ("vgremove: %s: %s", xs[i], err);
323 for (i = 0; xs[i] != NULL; ++i) {
324 r = command (NULL, &err, "/sbin/lvm", "pvremove", "-f", xs[i], NULL);
326 reply_with_error ("pvremove: %s: %s", xs[i], err);
337 /* There, that was easy, sorry about your data. */
342 do_lvremove (const char *device)
347 r = command (NULL, &err,
348 "/sbin/lvm", "lvremove", "-f", device, NULL);
350 reply_with_error ("%s", err);
363 do_vgremove (const char *device)
368 r = command (NULL, &err,
369 "/sbin/lvm", "vgremove", "-f", device, NULL);
371 reply_with_error ("%s", err);
384 do_pvremove (const char *device)
389 r = command (NULL, &err,
390 "/sbin/lvm", "pvremove", "-ff", device, NULL);
392 reply_with_error ("%s", err);
405 do_pvresize (const char *device)
410 r = command (NULL, &err,
411 "/sbin/lvm", "pvresize", device, NULL);
413 reply_with_error ("pvresize: %s: %s", device, err);
423 do_vg_activate (int activate, char *const *volgroups)
429 argc = count_strings (volgroups) + 4;
430 argv = malloc (sizeof (char *) * (argc+1));
432 reply_with_perror ("malloc");
436 argv[0] = "/sbin/lvm";
437 argv[1] = "vgchange";
439 argv[3] = activate ? "y" : "n";
440 for (i = 4; i <= argc; ++i)
441 argv[i] = volgroups[i-4];
443 r = commandv (NULL, &err, (char **) argv);
445 reply_with_error ("vgchange: %s", err);
458 do_vg_activate_all (int activate)
460 char *empty[] = { NULL };
461 return do_vg_activate (activate, empty);