/* libguestfs - the guestfsd daemon
- * Copyright (C) 2009 Red Hat Inc.
+ * Copyright (C) 2009 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
#include <stdio.h>
#include <stdlib.h>
+#include <inttypes.h>
#include <string.h>
#include <unistd.h>
-#include <ctype.h>
+#include <sys/stat.h>
#include "daemon.h"
+#include "c-ctype.h"
#include "actions.h"
+#include "optgroups.h"
+
+int
+optgroup_lvm2_available (void)
+{
+ return prog_exists ("lvm");
+}
/* LVM actions. Keep an eye on liblvm, although at the time
* of writing it hasn't progressed very far.
*/
static char **
-convert_lvm_output (char *out, char *prefix)
+convert_lvm_output (char *out, const char *prefix)
{
char *p, *pend;
char **r = NULL;
pend++;
}
- while (*p && isspace (*p)) /* Skip any leading whitespace. */
+ while (*p && c_isspace (*p)) /* Skip any leading whitespace. */
p++;
/* Sigh, skip trailing whitespace too. "pvs", I'm looking at you. */
len = strlen (p)-1;
- while (*p && isspace (p[len]))
+ while (*p && c_isspace (p[len]))
p[len--] = '\0';
if (!*p) { /* Empty line? Skip it. */
int r;
r = command (&out, &err,
- "/sbin/lvm", "pvs", "-o", "pv_name", "--noheadings", NULL);
+ "lvm", "pvs", "-o", "pv_name", "--noheadings", NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (out);
int r;
r = command (&out, &err,
- "/sbin/lvm", "vgs", "-o", "vg_name", "--noheadings", NULL);
+ "lvm", "vgs", "-o", "vg_name", "--noheadings", NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (out);
int r;
r = command (&out, &err,
- "/sbin/lvm", "lvs",
- "-o", "vg_name,lv_name", "--noheadings",
- "--separator", "/", NULL);
+ "lvm", "lvs",
+ "-o", "vg_name,lv_name", "--noheadings",
+ "--separator", "/", NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (out);
* the code. That code is in stubs.c, and it is generated as usual
* by generator.ml.
*/
-guestfs_lvm_int_pv_list *
+guestfs_int_lvm_pv_list *
do_pvs_full (void)
{
return parse_command_line_pvs ();
}
-guestfs_lvm_int_vg_list *
+guestfs_int_lvm_vg_list *
do_vgs_full (void)
{
return parse_command_line_vgs ();
}
-guestfs_lvm_int_lv_list *
+guestfs_int_lvm_lv_list *
do_lvs_full (void)
{
return parse_command_line_lvs ();
int r;
r = command (NULL, &err,
- "/sbin/lvm", "pvcreate", device, NULL);
+ "lvm", "pvcreate", device, NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
}
free (err);
+
+ udev_settle ();
+
return 0;
}
int
-do_vgcreate (const char *volgroup, char * const* const physvols)
+do_vgcreate (const char *volgroup, char *const *physvols)
{
char *err;
int r, argc, i;
argc = count_strings (physvols) + 3;
argv = malloc (sizeof (char *) * (argc + 1));
- argv[0] = "/sbin/lvm";
+ if (argv == NULL) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+ argv[0] = "lvm";
argv[1] = "vgcreate";
argv[2] = volgroup;
for (i = 3; i <= argc; ++i)
argv[i] = physvols[i-3];
- r = commandv (NULL, &err, argv);
+ r = commandv (NULL, &err, (const char * const*) argv);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
}
free (err);
+
+ udev_settle ();
+
return 0;
}
snprintf (size, sizeof size, "%d", mbytes);
r = command (NULL, &err,
- "/sbin/lvm", "lvcreate",
- "-L", size, "-n", logvol, volgroup, NULL);
+ "lvm", "lvcreate",
+ "-L", size, "-n", logvol, volgroup, NULL);
+ if (r == -1) {
+ reply_with_error ("%s", err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ udev_settle ();
+
+ return 0;
+}
+
+int
+do_lvresize (const char *logvol, int mbytes)
+{
+ char *err;
+ int r;
+ char size[64];
+
+ snprintf (size, sizeof size, "%d", mbytes);
+
+ r = command (NULL, &err,
+ "lvm", "lvresize",
+ "--force", "-L", size, logvol, NULL);
+ if (r == -1) {
+ reply_with_error ("%s", err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+ return 0;
+}
+
+int
+do_lvresize_free (const char *logvol, int percent)
+{
+ char *err;
+ int r;
+
+ if (percent < 0 || percent > 100) {
+ reply_with_error ("percentage must be [0..100] (was %d)", percent);
+ return -1;
+ }
+
+ char size[64];
+ snprintf (size, sizeof size, "+%d%%FREE", percent);
+
+ r = command (NULL, &err,
+ "lvm", "lvresize", "-l", size, logvol, NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
return -1;
for (i = 0; xs[i] != NULL; ++i) {
- r = command (NULL, &err, "/sbin/lvm", "lvremove", "-f", xs[i], NULL);
+ r = command (NULL, &err, "lvm", "lvremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("lvremove: %s: %s", xs[i], err);
free (err);
return -1;
for (i = 0; xs[i] != NULL; ++i) {
- r = command (NULL, &err, "/sbin/lvm", "vgremove", "-f", xs[i], NULL);
+ r = command (NULL, &err, "lvm", "vgremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("vgremove: %s: %s", xs[i], err);
free (err);
return -1;
for (i = 0; xs[i] != NULL; ++i) {
- r = command (NULL, &err, "/sbin/lvm", "pvremove", "-f", xs[i], NULL);
+ r = command (NULL, &err, "lvm", "pvremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("pvremove: %s: %s", xs[i], err);
free (err);
}
free_strings (xs);
+ udev_settle ();
+
/* There, that was easy, sorry about your data. */
return 0;
}
int r;
r = command (NULL, &err,
- "/sbin/lvm", "lvremove", "-f", device, NULL);
+ "lvm", "lvremove", "-f", device, NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
}
free (err);
+
+ udev_settle ();
+
return 0;
}
int r;
r = command (NULL, &err,
- "/sbin/lvm", "vgremove", "-f", device, NULL);
+ "lvm", "vgremove", "-f", device, NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
}
free (err);
+
+ udev_settle ();
+
return 0;
}
int r;
r = command (NULL, &err,
- "/sbin/lvm", "pvremove", "-ff", device, NULL);
+ "lvm", "pvremove", "-ff", device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s", err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ udev_settle ();
+
+ return 0;
+}
+
+int
+do_pvresize (const char *device)
+{
+ char *err;
+ int r;
+
+ r = command (NULL, &err,
+ "lvm", "pvresize", device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s: %s", device, err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+ return 0;
+}
+
+int
+do_pvresize_size (const char *device, int64_t size)
+{
+ char *err;
+ int r;
+
+ char buf[32];
+ snprintf (buf, sizeof buf, "%" PRIi64 "b", size);
+
+ r = command (NULL, &err,
+ "lvm", "pvresize",
+ "--setphysicalvolumesize", buf,
+ device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s: %s", device, err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+ return 0;
+}
+
+int
+do_vg_activate (int activate, char *const *volgroups)
+{
+ char *err;
+ int r, i, argc;
+ const char **argv;
+
+ argc = count_strings (volgroups) + 4;
+ argv = malloc (sizeof (char *) * (argc+1));
+ if (argv == NULL) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+
+ argv[0] = "lvm";
+ argv[1] = "vgchange";
+ argv[2] = "-a";
+ argv[3] = activate ? "y" : "n";
+ for (i = 4; i <= argc; ++i)
+ argv[i] = volgroups[i-4];
+
+ r = commandv (NULL, &err, (const char * const*) argv);
+ if (r == -1) {
+ reply_with_error ("vgchange: %s", err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ udev_settle ();
+
+ return 0;
+}
+
+int
+do_vg_activate_all (int activate)
+{
+ char *empty[] = { NULL };
+ return do_vg_activate (activate, empty);
+}
+
+int
+do_lvrename (const char *logvol, const char *newlogvol)
+{
+ char *err;
+ int r;
+
+ r = command (NULL, &err,
+ "lvm", "lvrename",
+ logvol, newlogvol, NULL);
+ if (r == -1) {
+ reply_with_error ("%s -> %s: %s", logvol, newlogvol, err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ udev_settle ();
+
+ return 0;
+}
+
+int
+do_vgrename (const char *volgroup, const char *newvolgroup)
+{
+ char *err;
+ int r;
+
+ r = command (NULL, &err,
+ "lvm", "vgrename",
+ volgroup, newvolgroup, NULL);
+ if (r == -1) {
+ reply_with_error ("%s -> %s: %s", volgroup, newvolgroup, err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+
+ udev_settle ();
+
+ return 0;
+}
+
+static char *
+get_lvm_field (const char *cmd, const char *field, const char *device)
+{
+ char *out;
+ char *err;
+ int r = command (&out, &err,
+ "lvm", cmd,
+ "--unbuffered", "--noheadings", "-o", field,
+ device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s: %s", device, err);
+ free (out);
+ free (err);
+ return NULL;
+ }
+
+ free (err);
+
+ trim (out);
+ return out; /* Caller frees. */
+}
+
+char *
+do_pvuuid (const char *device)
+{
+ return get_lvm_field ("pvs", "pv_uuid", device);
+}
+
+char *
+do_vguuid (const char *vgname)
+{
+ return get_lvm_field ("vgs", "vg_uuid", vgname);
+}
+
+char *
+do_lvuuid (const char *device)
+{
+ return get_lvm_field ("lvs", "lv_uuid", device);
+}
+
+static char **
+get_lvm_fields (const char *cmd, const char *field, const char *device)
+{
+ char *out;
+ char *err;
+ int r = command (&out, &err,
+ "lvm", cmd,
+ "--unbuffered", "--noheadings", "-o", field,
+ device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s: %s", device, err);
+ free (out);
+ free (err);
+ return NULL;
+ }
+
+ free (err);
+
+ char **ret = split_lines (out);
+ free (out);
+
+ if (ret == NULL)
+ return NULL;
+
+ size_t i;
+ for (i = 0; ret[i] != NULL; ++i)
+ trim (ret[i]);
+
+ return ret;
+}
+
+char **
+do_vgpvuuids (const char *vgname)
+{
+ return get_lvm_fields ("vgs", "pv_uuid", vgname);
+}
+
+char **
+do_vglvuuids (const char *vgname)
+{
+ return get_lvm_fields ("vgs", "lv_uuid", vgname);
+}
+
+int
+do_vgscan (void)
+{
+ char *err;
+ int r;
+
+ r = command (NULL, &err,
+ "lvm", "vgscan", NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
free (err);
return 0;
}
+
+/* Convert a non-canonical LV path like /dev/mapper/vg-lv or /dev/dm-0
+ * to a canonical one.
+ *
+ * This is harder than it should be. A LV device like /dev/VG/LV is
+ * really a symlink to a device-mapper device like /dev/dm-0. However
+ * at the device-mapper (kernel) level, nothing is really known about
+ * LVM (a userspace concept). Therefore we use a convoluted method to
+ * determine this, by listing out known LVs and checking whether the
+ * rdev (major/minor) of the device we are passed matches any of them.
+ *
+ * Note use of 'stat' instead of 'lstat' so that symlinks are fully
+ * resolved.
+ *
+ * Returns:
+ * 1 = conversion was successful, path is an LV
+ * '*ret' is set to the updated path if 'ret' is non-NULL.
+ * 0 = path is not an LV
+ * -1 = error, reply_with_* has been called
+ *
+ */
+int
+lv_canonical (const char *device, char **ret)
+{
+ struct stat stat1, stat2;
+
+ int r = stat (device, &stat1);
+ if (r == -1) {
+ reply_with_perror ("stat: %s", device);
+ return -1;
+ }
+
+ char **lvs = do_lvs ();
+ if (lvs == NULL)
+ return -1;
+
+ size_t i;
+ for (i = 0; lvs[i] != NULL; ++i) {
+ r = stat (lvs[i], &stat2);
+ if (r == -1) {
+ reply_with_perror ("stat: %s", lvs[i]);
+ free_strings (lvs);
+ return -1;
+ }
+ if (stat1.st_rdev == stat2.st_rdev) { /* found it */
+ if (ret) {
+ *ret = strdup (lvs[i]);
+ if (*ret == NULL) {
+ reply_with_perror ("strdup");
+ free_strings (lvs);
+ return -1;
+ }
+ }
+ free_strings (lvs);
+ return 1;
+ }
+ }
+
+ /* not found */
+ free_strings (lvs);
+ return 0;
+}
+
+/* Test if a device is a logical volume (RHBZ#619793). */
+int
+do_is_lv (const char *device)
+{
+ return lv_canonical (device, NULL);
+}
+
+/* Return canonical name of LV to caller (RHBZ#638899). */
+char *
+do_lvm_canonical_lv_name (const char *device)
+{
+ char *canonical;
+ int r = lv_canonical (device, &canonical);
+ if (r == -1)
+ return NULL;
+
+ if (r == 0) {
+ reply_with_error ("%s: not a logical volume", device);
+ return NULL;
+ }
+
+ return canonical; /* caller frees */
+}
git.annexia.org / libguestfs.git / blobdiff