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lvm2/tools/lvcreate.c

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tools.h"
#include "lv_alloc.h"
#include <fcntl.h>
struct lvcreate_cmdline_params {
percent_type_t percent;
uint64_t size;
char **pvs;
int pv_count;
};
static int _set_vg_name(struct lvcreate_params *lp, const char *vg_name)
{
/* Can't do anything */
if (!vg_name)
return 1;
/* If VG name already known, ensure this 2nd copy is identical */
if (lp->vg_name && strcmp(lp->vg_name, vg_name)) {
log_error("Inconsistent volume group names "
"given: \"%s\" and \"%s\"",
lp->vg_name, vg_name);
return 0;
}
lp->vg_name = vg_name;
return 1;
}
static int _lvcreate_name_params(struct lvcreate_params *lp,
struct cmd_context *cmd,
int *pargc, char ***pargv)
{
int argc = *pargc;
char **argv = *pargv, *ptr;
const char *vg_name;
lp->pool = arg_str_value(cmd, thinpool_ARG, NULL);
/* If --thinpool contains VG name, extract it. */
if (lp->pool && strchr(lp->pool, '/')) {
if (!(lp->vg_name = extract_vgname(cmd, lp->pool)))
return 0;
/* Strip VG from pool */
if ((ptr = strrchr(lp->pool, (int) '/')))
lp->pool = ptr + 1;
}
lp->lv_name = arg_str_value(cmd, name_ARG, NULL);
/* If --name contains VG name, extract it. */
if (lp->lv_name && strchr(lp->lv_name, '/')) {
if (!_set_vg_name(lp, extract_vgname(cmd, lp->lv_name)))
return_0;
/* Strip VG from lv_name */
if ((ptr = strrchr(lp->lv_name, (int) '/')))
lp->lv_name = ptr + 1;
}
/* Need an origin? */
if (lp->snapshot && !arg_count(cmd, virtualsize_ARG)) {
/* argv[0] might be origin or vg/origin */
if (!argc) {
log_error("Please specify a logical volume to act as "
"the snapshot origin.");
return 0;
}
lp->origin = skip_dev_dir(cmd, argv[0], NULL);
if (strrchr(lp->origin, '/')) {
if (!_set_vg_name(lp, extract_vgname(cmd, lp->origin)))
return_0;
/* Strip the volume group from the origin */
if ((ptr = strrchr(lp->origin, (int) '/')))
lp->origin = ptr + 1;
}
if (!lp->vg_name) {
log_error("The origin name should include the "
"volume group.");
return 0;
}
(*pargv)++, (*pargc)--;
} else if (seg_is_thin(lp) && !lp->pool && argc) {
/* argv[0] might be vg or vg/Pool */
vg_name = skip_dev_dir(cmd, argv[0], NULL);
if (!strrchr(vg_name, '/')) {
if (!_set_vg_name(lp, vg_name))
return_0;
} else {
lp->pool = vg_name;
if (!_set_vg_name(lp, extract_vgname(cmd, lp->pool)))
return_0;
if (!lp->vg_name) {
log_error("The pool name should include the "
"volume group.");
return 0;
}
/* Strip the volume group */
if ((ptr = strrchr(lp->pool, (int) '/')))
lp->pool = ptr + 1;
}
(*pargv)++, (*pargc)--;
} else {
/*
* If VG not on command line, try environment default.
*/
if (!argc) {
if (!lp->vg_name && !(lp->vg_name = extract_vgname(cmd, NULL))) {
log_error("Please provide a volume group name");
return 0;
}
} else {
vg_name = skip_dev_dir(cmd, argv[0], NULL);
if (strrchr(vg_name, '/')) {
log_error("Volume group name expected "
"(no slash)");
return 0;
}
if (!_set_vg_name(lp, vg_name))
return_0;
(*pargv)++, (*pargc)--;
}
}
if (!validate_name(lp->vg_name)) {
log_error("Volume group name %s has invalid characters",
lp->vg_name);
return 0;
}
if (lp->lv_name) {
if (!apply_lvname_restrictions(lp->lv_name))
return_0;
if (!validate_name(lp->lv_name)) {
log_error("Logical volume name \"%s\" is invalid",
lp->lv_name);
return 0;
}
}
if (lp->pool) {
if (!apply_lvname_restrictions(lp->pool))
return_0;
if (!validate_name(lp->pool)) {
log_error("Logical volume name \"%s\" is invalid",
lp->pool);
return 0;
}
if (lp->lv_name && !strcmp(lp->lv_name, lp->pool)) {
log_error("Logical volume name %s and pool name %s must be different.",
lp->lv_name, lp->pool);
return 0;
}
}
return 1;
}
/*
* Normal snapshot or thinly-provisioned snapshot?
*/
static int _determine_snapshot_type(struct volume_group *vg,
struct lvcreate_params *lp)
{
struct lv_list *lvl;
if (!(lvl = find_lv_in_vg(vg, lp->origin))) {
log_error("Snapshot origin LV %s not found in Volume group %s.", lp->origin, vg->name);
return 0;
}
if (lv_is_thin_volume(lvl->lv)) {
lp->thin = 1;
if (!(lp->segtype = get_segtype_from_string(vg->cmd, "thin")))
return_0;
lp->pool = first_seg(lvl->lv)->pool_lv->name;
}
if (!lp->thin && !arg_count(vg->cmd, extents_ARG) && !arg_count(vg->cmd, size_ARG)) {
log_error("Please specify either size or extents with snapshots.");
return 0;
}
return 1;
}
/*
* Update extents parameters based on other parameters which affect the size
* calcuation.
* NOTE: We must do this here because of the percent_t typedef and because we
* need the vg.
*/
static int _update_extents_params(struct volume_group *vg,
struct lvcreate_params *lp,
struct lvcreate_cmdline_params *lcp)
{
uint32_t pv_extent_count;
struct logical_volume *origin = NULL;
if (lcp->size &&
!(lp->extents = extents_from_size(vg->cmd, lcp->size,
vg->extent_size)))
return_0;
if (lp->voriginsize &&
!(lp->voriginextents = extents_from_size(vg->cmd, lp->voriginsize,
vg->extent_size)))
return_0;
/*
* Create the pv list before we parse lcp->percent - might be
* PERCENT_PVSs
*/
if (lcp->pv_count) {
if (!(lp->pvh = create_pv_list(vg->cmd->mem, vg,
lcp->pv_count, lcp->pvs, 1)))
return_0;
} else
lp->pvh = &vg->pvs;
switch(lcp->percent) {
case PERCENT_VG:
lp->extents = percent_of_extents(lp->extents, vg->extent_count);
break;
case PERCENT_FREE:
lp->extents = percent_of_extents(lp->extents, vg->free_count);
break;
case PERCENT_PVS:
if (!lcp->pv_count)
lp->extents = percent_of_extents(lp->extents, vg->extent_count);
else {
pv_extent_count = pv_list_extents_free(lp->pvh);
lp->extents = percent_of_extents(lp->extents, pv_extent_count);
}
break;
case PERCENT_LV:
log_error("Please express size as %%VG, %%PVS, or "
"%%FREE.");
return 0;
case PERCENT_ORIGIN:
if (lp->snapshot && lp->origin &&
!(origin = find_lv(vg, lp->origin))) {
log_error("Couldn't find origin volume '%s'.",
lp->origin);
return 0;
}
if (!origin) {
log_error(INTERNAL_ERROR "Couldn't find origin volume.");
return 0;
}
lp->extents = percent_of_extents(lp->extents, origin->le_count);
break;
case PERCENT_NONE:
break;
}
return 1;
}
static int _read_size_params(struct lvcreate_params *lp,
struct lvcreate_cmdline_params *lcp,
struct cmd_context *cmd)
{
if (arg_count(cmd, extents_ARG) && arg_count(cmd, size_ARG)) {
log_error("Please specify either size or extents (not both)");
return 0;
}
if (!lp->thin && !lp->snapshot && !arg_count(cmd, extents_ARG) && !arg_count(cmd, size_ARG)) {
log_error("Please specify either size or extents");
return 0;
}
if (arg_count(cmd, extents_ARG)) {
if (arg_sign_value(cmd, extents_ARG, 0) == SIGN_MINUS) {
log_error("Negative number of extents is invalid");
return 0;
}
lp->extents = arg_uint_value(cmd, extents_ARG, 0);
lcp->percent = arg_percent_value(cmd, extents_ARG, PERCENT_NONE);
}
/* Size returned in kilobyte units; held in sectors */
if (arg_count(cmd, size_ARG)) {
if (arg_sign_value(cmd, size_ARG, 0) == SIGN_MINUS) {
log_error("Negative size is invalid");
return 0;
}
lcp->size = arg_uint64_value(cmd, size_ARG, UINT64_C(0));
lcp->percent = PERCENT_NONE;
}
/* If size/extents given with thin, then we are creating a thin pool */
if (lp->thin && (arg_count(cmd, size_ARG) || arg_count(cmd, extents_ARG)))
lp->create_thin_pool = 1;
/* Size returned in kilobyte units; held in sectors */
if (arg_count(cmd, virtualsize_ARG)) {
if (seg_is_thin_pool(lp)) {
log_error("Virtual size in incompatible with thin_pool segment type.");
return 0;
}
if (arg_sign_value(cmd, virtualsize_ARG, 0) == SIGN_MINUS) {
log_error("Negative virtual origin size is invalid");
return 0;
}
lp->voriginsize = arg_uint64_value(cmd, virtualsize_ARG,
UINT64_C(0));
if (!lp->voriginsize) {
log_error("Virtual origin size may not be zero");
return 0;
}
} else {
/* No virtual size given, so no thin LV to create. */
if (seg_is_thin_volume(lp) && !(lp->segtype = get_segtype_from_string(cmd, "thin_pool")))
return_0;
lp->thin = 0;
}
return 1;
}
/*
* Generic mirror parameter checks.
* FIXME: Should eventually be moved into lvm library.
*/
static int _validate_mirror_params(const struct cmd_context *cmd __attribute__((unused)),
const struct lvcreate_params *lp)
{
int pagesize = lvm_getpagesize();
if (lp->region_size & (lp->region_size - 1)) {
log_error("Region size (%" PRIu32 ") must be a power of 2",
lp->region_size);
return 0;
}
if (lp->region_size % (pagesize >> SECTOR_SHIFT)) {
log_error("Region size (%" PRIu32 ") must be a multiple of "
"machine memory page size (%d)",
lp->region_size, pagesize >> SECTOR_SHIFT);
return 0;
}
if (!lp->region_size) {
log_error("Non-zero region size must be supplied.");
return 0;
}
return 1;
}
static int _read_mirror_params(struct lvcreate_params *lp,
struct cmd_context *cmd)
{
int region_size;
const char *mirrorlog;
int corelog = arg_count(cmd, corelog_ARG);
mirrorlog = arg_str_value(cmd, mirrorlog_ARG,
corelog ? "core" : DEFAULT_MIRRORLOG);
if (strcmp("core", mirrorlog) && corelog) {
log_error("Please use only one of --mirrorlog or --corelog");
return 0;
}
if (!strcmp("mirrored", mirrorlog)) {
lp->log_count = 2;
} else if (!strcmp("disk", mirrorlog)) {
lp->log_count = 1;
} else if (!strcmp("core", mirrorlog))
lp->log_count = 0;
else {
log_error("Unknown mirrorlog type: %s", mirrorlog);
return 0;
}
log_verbose("Setting logging type to %s", mirrorlog);
lp->nosync = arg_is_set(cmd, nosync_ARG);
if (arg_count(cmd, regionsize_ARG)) {
if (arg_sign_value(cmd, regionsize_ARG, 0) == SIGN_MINUS) {
log_error("Negative regionsize is invalid");
return 0;
}
lp->region_size = arg_uint_value(cmd, regionsize_ARG, 0);
} else {
region_size = 2 * find_config_tree_int(cmd,
"activation/mirror_region_size",
DEFAULT_MIRROR_REGION_SIZE);
if (region_size < 0) {
log_error("Negative regionsize in configuration file "
"is invalid");
return 0;
}
lp->region_size = region_size;
}
if (!_validate_mirror_params(cmd, lp))
return 0;
return 1;
}
static int _read_raid_params(struct lvcreate_params *lp,
struct cmd_context *cmd)
{
if (!segtype_is_raid(lp->segtype))
return 1;
if (arg_count(cmd, corelog_ARG) ||
arg_count(cmd, mirrorlog_ARG)) {
log_error("Log options not applicable to %s segtype",
lp->segtype->name);
return 0;
}
/*
* get_stripe_params is called before _read_raid_params
* and already sets:
* lp->stripes
* lp->stripe_size
*
* For RAID 4/5/6, these values must be set.
*/
if (!segtype_is_mirrored(lp->segtype) && (lp->stripes < 2)) {
log_error("Number of stripes to %s not specified",
lp->segtype->name);
return 0;
}
/*
* _read_mirror_params is called before _read_raid_params
* and already sets:
* lp->nosync
* lp->region_size
*
* But let's ensure that programmers don't reorder
* that by checking and warning if they aren't set.
*/
if (!lp->region_size) {
log_error(INTERNAL_ERROR "region_size not set.");
return 0;
}
return 1;
}
static int _read_activation_params(struct lvcreate_params *lp, struct cmd_context *cmd)
{
unsigned pagesize;
lp->activate = arg_uint_value(cmd, available_ARG, CHANGE_AY);
if (lp->activate == CHANGE_AN || lp->activate == CHANGE_ALN) {
if (lp->zero && !seg_is_thin(lp)) {
log_error("--available n requires --zero n");
return 0;
}
}
/*
* Read ahead.
*/
lp->read_ahead = arg_uint_value(cmd, readahead_ARG,
cmd->default_settings.read_ahead);
pagesize = lvm_getpagesize() >> SECTOR_SHIFT;
if (lp->read_ahead != DM_READ_AHEAD_AUTO &&
lp->read_ahead != DM_READ_AHEAD_NONE &&
lp->read_ahead % pagesize) {
if (lp->read_ahead < pagesize)
lp->read_ahead = pagesize;
else
lp->read_ahead = (lp->read_ahead / pagesize) * pagesize;
log_warn("WARNING: Overriding readahead to %u sectors, a multiple "
"of %uK page size.", lp->read_ahead, pagesize >> 1);
}
/*
* Permissions.
*/
lp->permission = arg_uint_value(cmd, permission_ARG,
LVM_READ | LVM_WRITE);
if (lp->thin && !(lp->permission & LVM_WRITE)) {
log_error("Read-only thin volumes are not currently supported.");
return 0;
}
/* Must not zero read only volume */
if (!(lp->permission & LVM_WRITE))
lp->zero = 0;
lp->minor = arg_int_value(cmd, minor_ARG, -1);
lp->major = arg_int_value(cmd, major_ARG, -1);
/* Persistent minor */
if (arg_count(cmd, persistent_ARG)) {
if (lp->create_thin_pool && !lp->thin) {
log_error("--persistent is not permitted when creating a thin pool device.");
return 0;
}
if (!strcmp(arg_str_value(cmd, persistent_ARG, "n"), "y")) {
if (lp->minor == -1) {
log_error("Please specify minor number with "
"--minor when using -My");
return 0;
}
if (lp->major == -1) {
log_error("Please specify major number with "
"--major when using -My");
return 0;
}
} else {
if ((lp->minor != -1) || (lp->major != -1)) {
log_error("--major and --minor incompatible "
"with -Mn");
return 0;
}
}
} else if (arg_count(cmd, minor_ARG) || arg_count(cmd, major_ARG)) {
log_error("--major and --minor require -My");
return 0;
}
return 1;
}
static int _lvcreate_params(struct lvcreate_params *lp,
struct lvcreate_cmdline_params *lcp,
struct cmd_context *cmd,
int argc, char **argv)
{
int contiguous;
struct arg_value_group_list *current_group;
const char *segtype_str;
const char *tag;
memset(lp, 0, sizeof(*lp));
memset(lcp, 0, sizeof(*lcp));
dm_list_init(&lp->tags);
/*
* Check selected options are compatible and determine segtype
*/
// FIXME -m0 implies *striped*
if (arg_count(cmd, thin_ARG) && arg_count(cmd,mirrors_ARG)) {
log_error("--thin and --mirrors are incompatible.");
return 0;
}
// FIXME -m0 implies *striped*
/* Set default segtype */
if (arg_count(cmd, mirrors_ARG))
segtype_str = find_config_tree_str(cmd, "global/mirror_segtype_default", DEFAULT_MIRROR_SEGTYPE);
else if (arg_count(cmd, thin_ARG) || arg_count(cmd, thinpool_ARG))
segtype_str = "thin";
else
segtype_str = "striped";
lp->segtype = get_segtype_from_string(cmd, arg_str_value(cmd, type_ARG, segtype_str));
if (seg_unknown(lp)) {
log_error("Unable to create LV with unknown segment type %s.", arg_str_value(cmd, type_ARG, segtype_str));
return 0;
}
if (arg_count(cmd, snapshot_ARG) || seg_is_snapshot(lp) ||
(!seg_is_thin(lp) && arg_count(cmd, virtualsize_ARG)))
lp->snapshot = 1;
if (seg_is_thin_pool(lp)) {
if (lp->snapshot) {
log_error("Snapshots are incompatible with thin_pool segment_type.");
return 0;
}
lp->create_thin_pool = 1;
}
if (seg_is_thin_volume(lp))
lp->thin = 1;
lp->mirrors = 1;
/* Default to 2 mirrored areas if '--type mirror|raid1' */
if (segtype_is_mirrored(lp->segtype))
lp->mirrors = 2;
if (arg_count(cmd, mirrors_ARG)) {
lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 0) + 1;
if (lp->mirrors == 1) {
if (segtype_is_mirrored(lp->segtype)) {
log_error("--mirrors must be at least 1 with segment type %s.", lp->segtype->name);
return 0;
}
log_print("Redundant mirrors argument: default is 0");
}
if (arg_sign_value(cmd, mirrors_ARG, 0) == SIGN_MINUS) {
log_error("Mirrors argument may not be negative");
return 0;
}
}
if (lp->snapshot && arg_count(cmd, zero_ARG)) {
log_error("-Z is incompatible with snapshots");
return 0;
}
if (segtype_is_mirrored(lp->segtype) || segtype_is_raid(lp->segtype)) {
if (lp->snapshot) {
log_error("mirrors and snapshots are currently "
"incompatible");
return 0;
}
} else {
if (arg_count(cmd, corelog_ARG)) {
log_error("--corelog is only available with mirrors");
return 0;
}
if (arg_count(cmd, mirrorlog_ARG)) {
log_error("--mirrorlog is only available with mirrors");
return 0;
}
if (arg_count(cmd, nosync_ARG)) {
log_error("--nosync is only available with mirrors");
return 0;
}
}
if (activation() && lp->segtype->ops->target_present &&
!lp->segtype->ops->target_present(cmd, NULL, NULL)) {
log_error("%s: Required device-mapper target(s) not "
"detected in your kernel", lp->segtype->name);
return 0;
}
if (!get_activation_monitoring_mode(cmd, NULL,
&lp->activation_monitoring))
return_0;
if (!_lvcreate_name_params(lp, cmd, &argc, &argv) ||
!_read_size_params(lp, lcp, cmd) ||
!get_stripe_params(cmd, &lp->stripes, &lp->stripe_size) ||
!_read_mirror_params(lp, cmd) ||
!_read_raid_params(lp, cmd))
return_0;
if (lp->snapshot && lp->thin && arg_count(cmd, chunksize_ARG))
log_warn("WARNING: Ignoring --chunksize with thin snapshots.");
else if (lp->thin && !lp->create_thin_pool) {
if (arg_count(cmd, chunksize_ARG))
log_warn("WARNING: Ignoring --chunksize when using an existing pool.");
} else if (lp->snapshot || lp->create_thin_pool) {
if (arg_sign_value(cmd, chunksize_ARG, 0) == SIGN_MINUS) {
log_error("Negative chunk size is invalid");
return 0;
}
lp->chunk_size = arg_uint_value(cmd, chunksize_ARG, 8);
if (lp->chunk_size < 8 || lp->chunk_size > 1024 ||
(lp->chunk_size & (lp->chunk_size - 1))) {
log_error("Chunk size must be a power of 2 in the "
"range 4K to 512K");
return 0;
}
log_verbose("Setting chunksize to %d sectors.", lp->chunk_size);
if (!lp->thin && lp->snapshot && !(lp->segtype = get_segtype_from_string(cmd, "snapshot")))
return_0;
} else {
if (arg_count(cmd, chunksize_ARG)) {
log_error("-c is only available with snapshots and thin pools");
return 0;
}
}
/*
* Should we zero the lv.
*/
lp->zero = strcmp(arg_str_value(cmd, zero_ARG,
(lp->segtype->flags & SEG_CANNOT_BE_ZEROED) ? "n" : "y"), "n");
if (lp->mirrors > DEFAULT_MIRROR_MAX_IMAGES) {
log_error("Only up to %d images in mirror supported currently.",
DEFAULT_MIRROR_MAX_IMAGES);
return 0;
}
if (!_read_activation_params(lp, cmd))
return_0;
/*
* Allocation parameters
*/
contiguous = strcmp(arg_str_value(cmd, contiguous_ARG, "n"), "n");
lp->alloc = contiguous ? ALLOC_CONTIGUOUS : ALLOC_INHERIT;
lp->alloc = arg_uint_value(cmd, alloc_ARG, lp->alloc);
if (contiguous && (lp->alloc != ALLOC_CONTIGUOUS)) {
log_error("Conflicting contiguous and alloc arguments");
return 0;
}
dm_list_iterate_items(current_group, &cmd->arg_value_groups) {
if (!grouped_arg_is_set(current_group->arg_values, addtag_ARG))
continue;
if (!(tag = grouped_arg_str_value(current_group->arg_values, addtag_ARG, NULL))) {
log_error("Failed to get tag");
return 0;
}
if (!str_list_add(cmd->mem, &lp->tags, tag)) {
log_error("Unable to allocate memory for tag %s", tag);
return 0;
}
}
lcp->pv_count = argc;
lcp->pvs = argv;
return 1;
}
static int _check_thin_parameters(struct volume_group *vg, struct lvcreate_params *lp,
struct lvcreate_cmdline_params *lcp)
{
struct lv_list *lvl;
if (!lp->thin && !lp->create_thin_pool) {
log_error("Please specify device size(s).");
return 0;
}
if (lp->thin && !lp->create_thin_pool) {
if (arg_count(vg->cmd, chunksize_ARG)) {
log_error("Only specify --chunksize when originally creating the thin pool.");
return 0;
}
if (lcp->pv_count) {
log_error("Only specify Physical volumes when allocating the thin pool.");
return 0;
}
if (arg_count(vg->cmd, alloc_ARG)) {
log_error("--alloc may only be specified when allocating the thin pool.");
return 0;
}
if (arg_count(vg->cmd, stripesize_ARG)) {
log_error("--stripesize may only be specified when allocating the thin pool.");
return 0;
}
if (arg_count(vg->cmd, stripes_ARG)) {
log_error("--stripes may only be specified when allocating the thin pool.");
return 0;
}
if (arg_count(vg->cmd, contiguous_ARG)) {
log_error("--contiguous may only be specified when allocating the thin pool.");
return 0;
}
if (arg_count(vg->cmd, zero_ARG)) {
log_error("--zero may only be specified when allocating the thin pool.");
return 0;
}
}
if (lp->create_thin_pool && lp->pool) {
if (find_lv_in_vg(vg, lp->pool)) {
log_error("Pool %s already exists in Volume group %s.", lp->pool, vg->name);
return 0;
}
} else if (lp->pool) {
if (!(lvl = find_lv_in_vg(vg, lp->pool))) {
log_error("Pool %s not found in Volume group %s.", lp->pool, vg->name);
return 0;
}
if (!lv_is_thin_pool(lvl->lv)) {
log_error("Logical volume %s is not a thin pool.", lp->pool);
return 0;
}
} else if (!lp->create_thin_pool) {
log_error("Please specify name of existing pool.");
return 0;
}
if (!lp->thin && lp->lv_name) {
log_error("--name may only be given when creating a new thin Logical volume or snapshot.");
return 0;
}
if (!lp->thin) {
if (arg_count(vg->cmd, readahead_ARG)) {
log_error("--readhead may only be given when creating a new thin Logical volume or snapshot.");
return 0;
}
if (arg_count(vg->cmd, permission_ARG)) {
log_error("--permission may only be given when creating a new thin Logical volume or snapshot.");
return 0;
}
if (arg_count(vg->cmd, persistent_ARG)) {
log_error("--persistent may only be given when creating a new thin Logical volume or snapshot.");
return 0;
}
}
return 1;
}
/*
* Ensure the set of thin parameters extracted from the command line is consistent.
*/
static int _validate_internal_thin_processing(const struct lvcreate_params *lp)
{
int r = 1;
/*
The final state should be one of:
thin create_thin_pool snapshot origin pool
1 1 0 0 y/n - create new pool and a thin LV in it
1 0 0 0 y - create new thin LV in existing pool
0 1 0 0 y/n - create new pool only
1 0 1 1 y - create thin snapshot of existing thin LV
*/
if (!lp->create_thin_pool && !lp->pool) {
log_error(INTERNAL_ERROR "--thinpool not identified.");
r = 0;
}
if ((lp->snapshot && !lp->origin) || (!lp->snapshot && lp->origin)) {
log_error(INTERNAL_ERROR "Inconsistent snapshot and origin parameters identified.");
r = 0;
}
if (lp->snapshot && (lp->create_thin_pool || !lp->thin)) {
log_error(INTERNAL_ERROR "Inconsistent thin and snapshot parameters identified.");
r = 0;
}
if (!lp->thin && !lp->create_thin_pool) {
log_error(INTERNAL_ERROR "Failed to identify what type of thin target to use.");
r = 0;
}
if (seg_is_thin_pool(lp) && lp->thin) {
log_error(INTERNAL_ERROR "Thin volume cannot be created with thin pool segment type.");
r = 0;
}
return r;
}
int lvcreate(struct cmd_context *cmd, int argc, char **argv)
{
int r = ECMD_PROCESSED;
struct lvcreate_params lp;
struct lvcreate_cmdline_params lcp;
struct volume_group *vg;
if (!_lvcreate_params(&lp, &lcp, cmd, argc, argv))
return EINVALID_CMD_LINE;
log_verbose("Finding volume group \"%s\"", lp.vg_name);
vg = vg_read_for_update(cmd, lp.vg_name, NULL, 0);
if (vg_read_error(vg)) {
release_vg(vg);
stack;
return ECMD_FAILED;
}
if (lp.snapshot && lp.origin && !_determine_snapshot_type(vg, &lp)) {
r = ECMD_FAILED;
goto_out;
}
if (seg_is_thin(&lp) && !_check_thin_parameters(vg, &lp, &lcp)) {
r = ECMD_FAILED;
goto_out;
}
if (!_update_extents_params(vg, &lp, &lcp)) {
r = ECMD_FAILED;
goto_out;
}
if (seg_is_thin(&lp) && !_validate_internal_thin_processing(&lp)) {
r = ECMD_FAILED;
goto_out;
}
if (lp.create_thin_pool)
log_verbose("Making thin pool %s in VG %s using segtype %s",
lp.pool ? : "with generated name", lp.vg_name, lp.segtype->name);
if (lp.thin)
log_verbose("Making thin LV %s in pool %s in VG %s%s%s using segtype %s",
lp.lv_name ? : "with generated name",
lp.pool, lp.vg_name, lp.snapshot ? " as snapshot of " : "",
lp.snapshot ? lp.origin : "", lp.segtype->name);
/* FIXME Remove when thin snapshots are supported. */
if (lp.thin && lp.snapshot) {
log_error("Thin snapshots are not yet supported.");
r = ECMD_FAILED;
goto_out;
}
if (!lv_create_single(vg, &lp)) {
stack;
r = ECMD_FAILED;
}
out:
unlock_and_release_vg(cmd, vg, lp.vg_name);
return r;
}
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