int
do_part_set_name (const char *device, int partnum, const char *name)
{
int r;
CLEANUP_FREE char *err = NULL;
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
char partstr[16];
snprintf (partstr, sizeof partstr, "%d", partnum);
udev_settle ();
r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"parted", "-s", "--", device, "name", partstr, name, NULL);
if (r == -1) {
reply_with_error ("parted: %s: %s", device, err);
return -1;
}
udev_settle ();
return 0;
}
int
do_part_init (const char *device, const char *parttype)
{
int r;
CLEANUP_FREE char *err = NULL;
parttype = check_parttype (parttype);
if (!parttype) {
reply_with_error ("unknown partition type: common choices are \"gpt\" and \"msdos\"");
return -1;
}
udev_settle ();
r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"parted", "-s", "--", device, "mklabel", parttype, NULL);
if (r == -1) {
reply_with_error ("parted: %s: %s", device, err);
return -1;
}
udev_settle ();
return 0;
}
static char *
print_partition_table (const char *device, bool add_m_option)
{
char *out;
CLEANUP_FREE char *err = NULL;
int r;
udev_settle ();
if (add_m_option)
r = command (&out, &err, "parted", "-m", "-s", "--", device,
"unit", "b",
"print", NULL);
else
r = command (&out, &err, "parted", "-s", "--", device,
"unit", "b",
"print", NULL);
udev_settle ();
if (r == -1) {
int errcode = 0;
/* Translate "unrecognised disk label" into an errno code. */
if (err && strstr (err, "unrecognised disk label") != NULL)
errcode = EINVAL;
reply_with_error_errno (errcode, "parted print: %s: %s", device, err);
free (out);
return NULL;
}
return out;
}
int
do_part_set_mbr_id (const char *device, int partnum, int idbyte)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
char partnum_str[16];
snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
char idbyte_str[16];
snprintf (idbyte_str, sizeof partnum_str, "%x", idbyte); /* NB: hex */
CLEANUP_FREE char *err = NULL;
int r;
udev_settle ();
r = command (NULL, &err, str_sfdisk,
"--change-id", device, partnum_str, idbyte_str, NULL);
if (r == -1) {
reply_with_error ("sfdisk --change-id: %s", err);
return -1;
}
udev_settle ();
return 0;
}
int
do_part_resize (const char *device, int partnum, int64_t endsect)
{
int r;
CLEANUP_FREE char *err = NULL;
char endstr[32];
char partnum_str[16];
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
snprintf (endstr, sizeof endstr, "%" PRIi64 "s", endsect);
udev_settle ();
r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"parted", "-s", "--", device, "resizepart", partnum_str,
endstr, NULL);
if (r == -1) {
reply_with_error ("parted: %s: %s:", device, err);
return -1;
}
udev_settle();
return 0;
}
/* Currently we use sfdisk for getting and setting the ID byte. In
* future, extend parted to provide this functionality. As a result
* of using sfdisk, this won't work for non-MBR-style partitions, but
* that limitation is noted in the documentation and we can extend it
* later without breaking the ABI.
*/
int
do_part_get_mbr_id (const char *device, int partnum)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
char partnum_str[16];
snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
CLEANUP_FREE char *out = NULL, *err = NULL;
int r;
udev_settle ();
r = command (&out, &err, str_sfdisk, "--print-id", device, partnum_str, NULL);
if (r == -1) {
reply_with_error ("sfdisk --print-id: %s", err);
return -1;
}
udev_settle ();
/* It's printed in hex ... */
int id;
if (sscanf (out, "%x", &id) != 1) {
reply_with_error ("sfdisk --print-id: cannot parse output: %s", out);
return -1;
}
return id;
}
int
do_part_set_bootable (const char *device, int partnum, int bootable)
{
int r;
char *err;
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
char partstr[16];
snprintf (partstr, sizeof partstr, "%d", partnum);
udev_settle ();
r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"parted", "-s", "--",
device, "set", partstr, "boot", bootable ? "on" : "off", NULL);
if (r == -1) {
reply_with_error ("parted: %s: %s", device, err);
free (err);
return -1;
}
free (err);
udev_settle ();
return 0;
}
int
do_part_set_mbr_id (const char *device, int partnum, int idbyte)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
const char *param = test_sfdisk_has_part_type () ? "--part-type" : "--change-id";
char partnum_str[16];
snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
char idbyte_str[16];
/* NB: hex */
snprintf (idbyte_str, sizeof partnum_str, "%x", (unsigned) idbyte);
CLEANUP_FREE char *err = NULL;
int r;
udev_settle ();
r = command (NULL, &err, "sfdisk",
param, device, partnum_str, idbyte_str, NULL);
if (r == -1) {
reply_with_error ("sfdisk %s: %s", param, err);
return -1;
}
udev_settle ();
return 0;
}
int
do_part_add (const char *device, const char *prlogex,
int64_t startsect, int64_t endsect)
{
int r;
char *err;
char startstr[32];
char endstr[32];
/* Check and translate prlogex. */
if (STREQ (prlogex, "primary") ||
STREQ (prlogex, "logical") ||
STREQ (prlogex, "extended"))
;
else if (STREQ (prlogex, "p"))
prlogex = "primary";
else if (STREQ (prlogex, "l"))
prlogex = "logical";
else if (STREQ (prlogex, "e"))
prlogex = "extended";
else {
reply_with_error ("unknown partition type: %s: this should be \"primary\", \"logical\" or \"extended\"", prlogex);
return -1;
}
if (startsect < 0) {
reply_with_error ("startsect cannot be negative");
return -1;
}
/* but endsect can be negative */
snprintf (startstr, sizeof startstr, "%" PRIi64 "s", startsect);
snprintf (endstr, sizeof endstr, "%" PRIi64 "s", endsect);
udev_settle ();
/* XXX Bug: If the partition table type (which we don't know in this
* function) is GPT, then this parted command sets the _partition
* name_ to prlogex, eg. "primary". I would essentially describe
* this as a bug in the parted mkpart command.
*/
r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"parted", "-s", "--",
device, "mkpart", prlogex, startstr, endstr, NULL);
if (r == -1) {
reply_with_error ("parted: %s: %s", device, err);
free (err);
return -1;
}
free (err);
udev_settle ();
return 0;
}
int
do_lvcreate_free (const char *logvol, const char *volgroup, int percent)
{
CLEANUP_FREE char *err = NULL;
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,
str_lvm, "lvcreate",
"-l", size, "-n", logvol, volgroup, NULL);
if (r == -1) {
reply_with_error ("%s", err);
return -1;
}
udev_settle ();
return 0;
}
int
do_luks_close (const char *device)
{
/* Must be /dev/mapper/... */
if (! STRPREFIX (device, "/dev/mapper/")) {
reply_with_error ("luks_close: you must call this on the /dev/mapper device created by luks_open");
return -1;
}
const char *mapname = &device[12];
char *err;
int r = command (NULL, &err, str_cryptsetup, "luksClose", mapname, NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
return -1;
}
free (err);
udev_settle ();
return 0;
}
int
do_vg_activate (int activate, char *const *volgroups)
{
int r, i, argc;
CLEANUP_FREE char *err = NULL;
CLEANUP_FREE const char **argv = NULL;
argc = count_strings (volgroups) + 4;
argv = malloc (sizeof (char *) * (argc+1));
if (argv == NULL) {
reply_with_perror ("malloc");
return -1;
}
argv[0] = str_lvm;
argv[1] = "vgchange";
argv[2] = "-a";
argv[3] = activate ? "y" : "n";
for (i = 4; i < argc+1; ++i)
argv[i] = volgroups[i-4];
r = commandv (NULL, &err, (const char * const*) argv);
if (r == -1) {
reply_with_error ("vgchange: %s", err);
return -1;
}
udev_settle ();
return 0;
}
int
do_vgcreate (const char *volgroup, char *const *physvols)
{
char *err;
int r, argc, i;
const char **argv;
argc = count_strings (physvols) + 3;
argv = malloc (sizeof (char *) * (argc + 1));
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, (const char * const*) argv);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
free (argv);
return -1;
}
free (err);
free (argv);
udev_settle ();
return 0;
}
int
do_part_disk (const char *device, const char *parttype)
{
parttype = check_parttype (parttype);
if (!parttype) {
reply_with_error ("unknown partition type: common choices are \"gpt\" and \"msdos\"");
return -1;
}
/* Align all partitions created this way to 128 sectors, and leave
* the last 128 sectors at the end of the disk free. This wastes
* 64K+64K = 128K on 512-byte sector disks. The rationale is:
*
* - aligned operations are faster
* - absolute minimum recommended alignment is 64K (1M would be better)
* - GPT requires at least 34 sectors at the end of the disk.
*/
const char *startstr = "128s";
const char *endstr = "-128s";
RUN_PARTED (return -1,
device,
"mklabel", parttype,
/* See comment about about the parted mkpart command. */
"mkpart", STREQ (parttype, "gpt") ? "p1" : "primary",
startstr, endstr, NULL);
udev_settle ();
return 0;
}
static int
pwrite_fd (int fd, const char *content, size_t size, int64_t offset,
const char *display_path, int settle)
{
ssize_t r;
r = pwrite (fd, content, size, offset);
if (r == -1) {
reply_with_perror ("pwrite: %s", display_path);
close (fd);
return -1;
}
if (close (fd) == -1) {
reply_with_perror ("close: %s", display_path);
return -1;
}
/* When you call close on any block device, udev kicks off a rule
* which runs blkid to reexamine the device. We need to wait for
* this rule to finish running since it holds the device open and
* can cause other operations to fail, notably BLKRRPART. 'settle'
* flag is only set on block devices.
*
* XXX We should be smarter about when we do this or should get rid
* of the udev rules since we don't use blkid in cached mode.
*/
if (settle)
udev_settle ();
return r;
}
int
do_vgcreate (const char *volgroup, char *const *physvols)
{
int r, argc, i;
CLEANUP_FREE char *err = NULL;
CLEANUP_FREE const char **argv = NULL;
argc = count_strings (physvols) + 3;
argv = malloc (sizeof (char *) * (argc + 1));
if (argv == NULL) {
reply_with_perror ("malloc");
return -1;
}
argv[0] = str_lvm;
argv[1] = "vgcreate";
argv[2] = volgroup;
for (i = 3; i < argc+1; ++i)
argv[i] = physvols[i-3];
r = commandv (NULL, &err, (const char * const*) argv);
if (r == -1) {
reply_with_error ("%s", err);
return -1;
}
udev_settle ();
return 0;
}
int
do_part_disk (const char *device, const char *parttype)
{
int r;
char *err;
parttype = check_parttype (parttype);
if (!parttype) {
reply_with_error ("unknown partition type: common choices are \"gpt\" and \"msdos\"");
return -1;
}
/* Align all partitions created this way to 128 sectors, and leave
* the last 128 sectors at the end of the disk free. This wastes
* 64K+64K = 128K on 512-byte sector disks. The rationale is:
*
* - aligned operations are faster
* - absolute minimum recommended alignment is 64K (1M would be better)
* - GPT requires at least 34 sectors* at the end of the disk.
*
* *=except for 4k sector disks, where only 6 sectors are required
*/
const char *startstr = "128s";
const char *endstr = "-128s";
udev_settle ();
r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"parted", "-s", "--",
device,
"mklabel", parttype,
/* See comment about about the parted mkpart command. */
"mkpart", STREQ (parttype, "gpt") ? "p1" : "primary",
startstr, endstr, NULL);
if (r == -1) {
reply_with_error ("parted: %s: %s", device, err);
free (err);
return -1;
}
free (err);
udev_settle ();
return 0;
}
int
do_part_init (const char *device, const char *parttype)
{
parttype = check_parttype (parttype);
if (!parttype) {
reply_with_error ("unknown partition type: common choices are \"gpt\" and \"msdos\"");
return -1;
}
RUN_PARTED (return -1, device, "mklabel", parttype, NULL);
udev_settle ();
return 0;
}
static int
luks_open (const char *device, const char *key, const char *mapname,
int readonly)
{
/* Sanity check: /dev/mapper/mapname must not exist already. Note
* that the device-mapper control device (/dev/mapper/control) is
* always there, so you can't ever have mapname == "control".
*/
size_t len = strlen (mapname);
char devmapper[len+32];
snprintf (devmapper, len+32, "/dev/mapper/%s", mapname);
if (access (devmapper, F_OK) == 0) {
reply_with_error ("%s: device already exists", devmapper);
return -1;
}
char *tempfile = write_key_to_temp (key);
if (!tempfile)
return -1;
const char *argv[MAX_ARGS];
size_t i = 0;
ADD_ARG (argv, i, str_cryptsetup);
ADD_ARG (argv, i, "-d");
ADD_ARG (argv, i, tempfile);
if (readonly) ADD_ARG (argv, i, "--readonly");
ADD_ARG (argv, i, "luksOpen");
ADD_ARG (argv, i, device);
ADD_ARG (argv, i, mapname);
ADD_ARG (argv, i, NULL);
char *err;
int r = commandv (NULL, &err, (const char * const *) argv);
remove_temp (tempfile);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
return -1;
}
free (err);
udev_settle ();
return 0;
}
int
do_part_del (const char *device, int partnum)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
char partnum_str[16];
snprintf (partnum_str, sizeof partnum_str, "%d", partnum);
RUN_PARTED (return -1, device, "rm", partnum_str, NULL);
udev_settle ();
return 0;
}
int
do_pvremove (const char *device)
{
CLEANUP_FREE char *err = NULL;
int r;
r = command (NULL, &err,
str_lvm, "pvremove", "-ff", device, NULL);
if (r == -1) {
reply_with_error ("%s", err);
return -1;
}
udev_settle ();
return 0;
}
int
do_vgchange_uuid_all (void)
{
CLEANUP_FREE char *err = NULL;
int r;
r = command (NULL, &err,
str_lvm, "vgchange", "-u", NULL);
if (r == -1) {
reply_with_error ("%s", err);
return -1;
}
udev_settle ();
return 0;
}
/* Notes:
*
* Parted 1.9 sends error messages to stdout, hence use of the
* COMMAND_FLAG_FOLD_STDOUT_ON_STDERR flag.
*
* parted occasionally fails to do ioctl(BLKRRPART) on the device,
* probably because udev monitors all 'close' on block devices
* and runs 'blkid' which opens and examines the device. We attempt
* to detect and recover from this error if we can.
*/
static int
recover_blkrrpart (const char *device, const char *err)
{
int r;
if (!strstr (err,
"Error informing the kernel about modifications to partition"))
return -1;
r = command (NULL, NULL, "blockdev", "--rereadpt", device, NULL);
if (r == -1)
return -1;
udev_settle ();
return 0;
}
int
do_vgrename (const char *volgroup, const char *newvolgroup)
{
CLEANUP_FREE char *err = NULL;
int r;
r = command (NULL, &err,
str_lvm, "vgrename",
volgroup, newvolgroup, NULL);
if (r == -1) {
reply_with_error ("%s -> %s: %s", volgroup, newvolgroup, err);
return -1;
}
udev_settle ();
return 0;
}
int
do_lvrename (const char *logvol, const char *newlogvol)
{
CLEANUP_FREE char *err = NULL;
int r;
r = command (NULL, &err,
str_lvm, "lvrename",
logvol, newlogvol, NULL);
if (r == -1) {
reply_with_error ("%s -> %s: %s", logvol, newlogvol, err);
return -1;
}
udev_settle ();
return 0;
}
/* Takes optional arguments, consult optargs_bitmask. */
int
do_mkswap (const char *device, const char *label, const char *uuid)
{
const size_t MAX_ARGS = 64;
const char *argv[MAX_ARGS];
size_t i = 0;
int r;
CLEANUP_FREE char *err = NULL;
ADD_ARG (argv, i, "mkswap");
ADD_ARG (argv, i, "-f");
if (optargs_bitmask & GUESTFS_MKSWAP_LABEL_BITMASK) {
assert (label != NULL); /* suppress a warning with -O3 */
if (strlen (label) > SWAP_LABEL_MAX) {
reply_with_error ("%s: Linux swap labels are limited to %d bytes",
label, SWAP_LABEL_MAX);
return -1;
}
ADD_ARG (argv, i, "-L");
ADD_ARG (argv, i, label);
}
if (optargs_bitmask & GUESTFS_MKSWAP_UUID_BITMASK) {
ADD_ARG (argv, i, "-U");
ADD_ARG (argv, i, uuid);
}
ADD_ARG (argv, i, device);
ADD_ARG (argv, i, NULL);
wipe_device_before_mkfs (device);
r = commandv (NULL, &err, argv);
if (r == -1) {
reply_with_error ("%s: %s", device, err);
return -1;
}
udev_settle ();
return 0;
}
int
do_part_set_bootable (const char *device, int partnum, int bootable)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
char partstr[16];
snprintf (partstr, sizeof partstr, "%d", partnum);
RUN_PARTED (return -1,
device, "set", partstr, "boot", bootable ? "on" : "off", NULL);
udev_settle ();
return 0;
}
static int
luks_format (const char *device, const char *key, int keyslot,
const char *cipher)
{
char *tempfile = write_key_to_temp (key);
if (!tempfile)
return -1;
const char *argv[MAX_ARGS];
char keyslot_s[16];
size_t i = 0;
ADD_ARG (argv, i, str_cryptsetup);
ADD_ARG (argv, i, "-q");
if (cipher) {
ADD_ARG (argv, i, "--cipher");
ADD_ARG (argv, i, cipher);
}
ADD_ARG (argv, i, "--key-slot");
snprintf (keyslot_s, sizeof keyslot_s, "%d", keyslot);
ADD_ARG (argv, i, keyslot_s);
ADD_ARG (argv, i, "luksFormat");
ADD_ARG (argv, i, device);
ADD_ARG (argv, i, tempfile);
ADD_ARG (argv, i, NULL);
char *err;
int r = commandv (NULL, &err, (const char * const *) argv);
remove_temp (tempfile);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
return -1;
}
free (err);
udev_settle ();
return 0;
}
int
do_pvremove (const char *device)
{
char *err;
int r;
r = command (NULL, &err,
"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_lvcreate (const char *logvol, const char *volgroup, int mbytes)
{
CLEANUP_FREE char *err = NULL;
int r;
char size[64];
snprintf (size, sizeof size, "%d", mbytes);
r = command (NULL, &err,
str_lvm, "lvcreate",
"-L", size, "-n", logvol, volgroup, NULL);
if (r == -1) {
reply_with_error ("%s", err);
return -1;
}
udev_settle ();
return 0;
}