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547 lines
13 KiB
C
547 lines
13 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "tools.h"
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#include "lv_alloc.h"
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#include <fcntl.h>
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struct lvcreate_cmdline_params {
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percent_t percent;
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uint64_t size;
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char **pvs;
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int pv_count;
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};
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static int _lvcreate_name_params(struct lvcreate_params *lp,
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struct cmd_context *cmd,
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int *pargc, char ***pargv)
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{
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int argc = *pargc;
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char **argv = *pargv, *ptr;
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char *vg_name;
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lp->lv_name = arg_str_value(cmd, name_ARG, NULL);
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if (lp->snapshot && !arg_count(cmd, virtualsize_ARG)) {
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if (!argc) {
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log_error("Please specify a logical volume to act as "
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"the snapshot origin.");
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return 0;
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}
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lp->origin = argv[0];
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(*pargv)++, (*pargc)--;
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if (!(lp->vg_name = extract_vgname(cmd, lp->origin))) {
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log_error("The origin name should include the "
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"volume group.");
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return 0;
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}
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/* Strip the volume group from the origin */
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if ((ptr = strrchr(lp->origin, (int) '/')))
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lp->origin = ptr + 1;
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} else {
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/*
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* If VG not on command line, try -n arg and then
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* environment.
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*/
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if (!argc) {
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if (!(lp->vg_name = extract_vgname(cmd, lp->lv_name))) {
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log_error("Please provide a volume group name");
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return 0;
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}
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} else {
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vg_name = skip_dev_dir(cmd, argv[0], NULL);
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if (strrchr(vg_name, '/')) {
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log_error("Volume group name expected "
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"(no slash)");
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return 0;
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}
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/*
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* Ensure lv_name doesn't contain a
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* different VG.
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*/
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if (lp->lv_name && strchr(lp->lv_name, '/')) {
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if (!(lp->vg_name =
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extract_vgname(cmd, lp->lv_name)))
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return 0;
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if (strcmp(lp->vg_name, vg_name)) {
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log_error("Inconsistent volume group "
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"names "
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"given: \"%s\" and \"%s\"",
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lp->vg_name, vg_name);
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return 0;
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}
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}
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lp->vg_name = vg_name;
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(*pargv)++, (*pargc)--;
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}
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}
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if (!validate_name(lp->vg_name)) {
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log_error("Volume group name %s has invalid characters",
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lp->vg_name);
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return 0;
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}
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if (lp->lv_name) {
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if ((ptr = strrchr(lp->lv_name, '/')))
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lp->lv_name = ptr + 1;
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if (!apply_lvname_restrictions(lp->lv_name))
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return_0;
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if (!validate_name(lp->lv_name)) {
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log_error("Logical volume name \"%s\" is invalid",
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lp->lv_name);
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return 0;
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}
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}
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return 1;
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}
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/*
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* Update extents parameters based on other parameters which affect the size
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* calcuation.
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* NOTE: We must do this here because of the percent_t typedef and because we
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* need the vg.
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*/
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static int _update_extents_params(struct volume_group *vg,
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struct lvcreate_params *lp,
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struct lvcreate_cmdline_params *lcp)
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{
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uint32_t pv_extent_count;
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struct logical_volume *origin = NULL;
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if (lcp->size &&
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!(lp->extents = extents_from_size(vg->cmd, lcp->size,
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vg->extent_size)))
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return_0;
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if (lp->voriginsize &&
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!(lp->voriginextents = extents_from_size(vg->cmd, lp->voriginsize,
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vg->extent_size)))
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return_0;
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/*
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* Create the pv list before we parse lcp->percent - might be
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* PERCENT_PVSs
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*/
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if (lcp->pv_count) {
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if (!(lp->pvh = create_pv_list(vg->cmd->mem, vg,
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lcp->pv_count, lcp->pvs, 1)))
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return_0;
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} else
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lp->pvh = &vg->pvs;
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switch(lcp->percent) {
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case PERCENT_VG:
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lp->extents = lp->extents * vg->extent_count / 100;
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break;
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case PERCENT_FREE:
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lp->extents = lp->extents * vg->free_count / 100;
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break;
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case PERCENT_PVS:
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if (!lcp->pv_count)
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lp->extents = lp->extents * vg->extent_count / 100;
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else {
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pv_extent_count = pv_list_extents_free(lp->pvh);
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lp->extents = lp->extents * pv_extent_count / 100;
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}
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break;
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case PERCENT_LV:
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log_error("Please express size as %%VG, %%PVS, or "
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"%%FREE.");
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return 0;
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case PERCENT_ORIGIN:
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if (lp->snapshot && lp->origin &&
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!(origin = find_lv(vg, lp->origin))) {
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log_error("Couldn't find origin volume '%s'.",
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lp->origin);
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return 0;
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}
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lp->extents = lp->extents * origin->le_count / 100;
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break;
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case PERCENT_NONE:
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break;
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}
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return 1;
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}
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static int _read_size_params(struct lvcreate_params *lp,
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struct lvcreate_cmdline_params *lcp,
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struct cmd_context *cmd)
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{
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if (arg_count(cmd, extents_ARG) + arg_count(cmd, size_ARG) != 1) {
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log_error("Please specify either size or extents (not both)");
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return 0;
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}
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if (arg_count(cmd, extents_ARG)) {
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if (arg_sign_value(cmd, extents_ARG, 0) == SIGN_MINUS) {
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log_error("Negative number of extents is invalid");
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return 0;
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}
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lp->extents = arg_uint_value(cmd, extents_ARG, 0);
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lcp->percent = arg_percent_value(cmd, extents_ARG, PERCENT_NONE);
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}
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/* Size returned in kilobyte units; held in sectors */
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if (arg_count(cmd, size_ARG)) {
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if (arg_sign_value(cmd, size_ARG, 0) == SIGN_MINUS) {
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log_error("Negative size is invalid");
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return 0;
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}
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lcp->size = arg_uint64_value(cmd, size_ARG, UINT64_C(0));
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lcp->percent = PERCENT_NONE;
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}
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/* Size returned in kilobyte units; held in sectors */
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if (arg_count(cmd, virtualsize_ARG)) {
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if (arg_sign_value(cmd, virtualsize_ARG, 0) == SIGN_MINUS) {
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log_error("Negative virtual origin size is invalid");
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return 0;
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}
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lp->voriginsize = arg_uint64_value(cmd, virtualsize_ARG,
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UINT64_C(0));
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if (!lp->voriginsize) {
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log_error("Virtual origin size may not be zero");
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return 0;
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}
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}
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return 1;
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}
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/*
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* Generic mirror parameter checks.
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* FIXME: Should eventually be moved into lvm library.
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*/
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static int _validate_mirror_params(const struct cmd_context *cmd __attribute__((unused)),
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const struct lvcreate_params *lp)
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{
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int pagesize = lvm_getpagesize();
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if (lp->region_size & (lp->region_size - 1)) {
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log_error("Region size (%" PRIu32 ") must be a power of 2",
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lp->region_size);
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return 0;
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}
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if (lp->region_size % (pagesize >> SECTOR_SHIFT)) {
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log_error("Region size (%" PRIu32 ") must be a multiple of "
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"machine memory page size (%d)",
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lp->region_size, pagesize >> SECTOR_SHIFT);
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return 0;
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}
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if (!lp->region_size) {
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log_error("Non-zero region size must be supplied.");
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return 0;
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}
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return 1;
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}
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static int _read_mirror_params(struct lvcreate_params *lp,
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struct cmd_context *cmd)
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{
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int region_size;
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const char *mirrorlog;
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int corelog = arg_count(cmd, corelog_ARG);
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mirrorlog = arg_str_value(cmd, mirrorlog_ARG,
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corelog ? "core" : DEFAULT_MIRRORLOG);
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if (strcmp("core", mirrorlog) && corelog) {
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log_error("Please use only one of --mirrorlog or --corelog");
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return 0;
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}
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if (!strcmp("mirrored", mirrorlog)) {
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lp->log_count = 2;
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} else if (!strcmp("disk", mirrorlog)) {
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lp->log_count = 1;
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} else if (!strcmp("core", mirrorlog))
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lp->log_count = 0;
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else {
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log_error("Unknown mirrorlog type: %s", mirrorlog);
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return 0;
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}
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log_verbose("Setting logging type to %s", mirrorlog);
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lp->nosync = arg_is_set(cmd, nosync_ARG);
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if (arg_count(cmd, regionsize_ARG)) {
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if (arg_sign_value(cmd, regionsize_ARG, 0) == SIGN_MINUS) {
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log_error("Negative regionsize is invalid");
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return 0;
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}
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lp->region_size = arg_uint_value(cmd, regionsize_ARG, 0);
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} else {
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region_size = 2 * find_config_tree_int(cmd,
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"activation/mirror_region_size",
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DEFAULT_MIRROR_REGION_SIZE);
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if (region_size < 0) {
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log_error("Negative regionsize in configuration file "
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"is invalid");
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return 0;
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}
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lp->region_size = region_size;
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}
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if (!_validate_mirror_params(cmd, lp))
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return 0;
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return 1;
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}
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static int _lvcreate_params(struct lvcreate_params *lp,
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struct lvcreate_cmdline_params *lcp,
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struct cmd_context *cmd,
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int argc, char **argv)
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{
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int contiguous;
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unsigned pagesize;
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memset(lp, 0, sizeof(*lp));
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memset(lcp, 0, sizeof(*lcp));
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/*
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* Check selected options are compatible and determine segtype
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*/
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lp->segtype = get_segtype_from_string(cmd, arg_str_value(cmd, type_ARG, "striped"));
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if (arg_count(cmd, snapshot_ARG) || seg_is_snapshot(lp) ||
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arg_count(cmd, virtualsize_ARG))
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lp->snapshot = 1;
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lp->mirrors = 1;
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/* Default to 2 mirrored areas if --type mirror */
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if (seg_is_mirrored(lp))
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lp->mirrors = 2;
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if (arg_count(cmd, mirrors_ARG)) {
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lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 0) + 1;
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if (lp->mirrors == 1)
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log_print("Redundant mirrors argument: default is 0");
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if (arg_sign_value(cmd, mirrors_ARG, 0) == SIGN_MINUS) {
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log_error("Mirrors argument may not be negative");
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return 0;
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}
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}
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if (lp->snapshot) {
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if (arg_count(cmd, zero_ARG)) {
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log_error("-Z is incompatible with snapshots");
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return 0;
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}
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if (arg_sign_value(cmd, chunksize_ARG, 0) == SIGN_MINUS) {
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log_error("Negative chunk size is invalid");
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return 0;
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}
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lp->chunk_size = arg_uint_value(cmd, chunksize_ARG, 8);
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if (lp->chunk_size < 8 || lp->chunk_size > 1024 ||
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(lp->chunk_size & (lp->chunk_size - 1))) {
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log_error("Chunk size must be a power of 2 in the "
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"range 4K to 512K");
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return 0;
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}
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log_verbose("Setting chunksize to %d sectors.", lp->chunk_size);
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if (!(lp->segtype = get_segtype_from_string(cmd, "snapshot")))
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return_0;
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} else {
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if (arg_count(cmd, chunksize_ARG)) {
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log_error("-c is only available with snapshots");
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return 0;
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}
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}
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if (lp->mirrors > 1) {
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if (lp->snapshot) {
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log_error("mirrors and snapshots are currently "
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"incompatible");
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return 0;
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}
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if (!(lp->segtype = get_segtype_from_string(cmd, "striped")))
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return_0;
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} else {
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if (arg_count(cmd, corelog_ARG)) {
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log_error("--corelog is only available with mirrors");
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return 0;
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}
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if (arg_count(cmd, mirrorlog_ARG)) {
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log_error("--mirrorlog is only available with mirrors");
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return 0;
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}
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if (arg_count(cmd, nosync_ARG)) {
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log_error("--nosync is only available with mirrors");
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return 0;
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}
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}
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if (activation() && lp->segtype->ops->target_present &&
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!lp->segtype->ops->target_present(cmd, NULL, NULL)) {
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log_error("%s: Required device-mapper target(s) not "
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"detected in your kernel", lp->segtype->name);
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return 0;
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}
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if (!get_activation_monitoring_mode(cmd, NULL,
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&lp->activation_monitoring))
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return_0;
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if (!_lvcreate_name_params(lp, cmd, &argc, &argv) ||
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!_read_size_params(lp, lcp, cmd) ||
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!get_stripe_params(cmd, &lp->stripes, &lp->stripe_size) ||
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!_read_mirror_params(lp, cmd))
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return_0;
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/*
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* Should we zero the lv.
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*/
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lp->zero = strcmp(arg_str_value(cmd, zero_ARG,
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(lp->segtype->flags & SEG_CANNOT_BE_ZEROED) ? "n" : "y"), "n");
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/*
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* Alloc policy
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*/
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contiguous = strcmp(arg_str_value(cmd, contiguous_ARG, "n"), "n");
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lp->alloc = contiguous ? ALLOC_CONTIGUOUS : ALLOC_INHERIT;
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lp->alloc = arg_uint_value(cmd, alloc_ARG, lp->alloc);
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if (contiguous && (lp->alloc != ALLOC_CONTIGUOUS)) {
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log_error("Conflicting contiguous and alloc arguments");
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return 0;
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}
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if (lp->mirrors > DEFAULT_MIRROR_MAX_IMAGES) {
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log_error("Only up to %d images in mirror supported currently.",
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DEFAULT_MIRROR_MAX_IMAGES);
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return 0;
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}
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/*
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* Read ahead.
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*/
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lp->read_ahead = arg_uint_value(cmd, readahead_ARG,
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cmd->default_settings.read_ahead);
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pagesize = lvm_getpagesize() >> SECTOR_SHIFT;
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if (lp->read_ahead != DM_READ_AHEAD_AUTO &&
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lp->read_ahead != DM_READ_AHEAD_NONE &&
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lp->read_ahead % pagesize) {
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if (lp->read_ahead < pagesize)
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lp->read_ahead = pagesize;
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else
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lp->read_ahead = (lp->read_ahead / pagesize) * pagesize;
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log_warn("WARNING: Overriding readahead to %u sectors, a multiple "
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"of %uK page size.", lp->read_ahead, pagesize >> 1);
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}
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/*
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* Permissions.
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*/
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lp->permission = arg_uint_value(cmd, permission_ARG,
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LVM_READ | LVM_WRITE);
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/* Must not zero read only volume */
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if (!(lp->permission & LVM_WRITE))
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lp->zero = 0;
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lp->minor = arg_int_value(cmd, minor_ARG, -1);
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lp->major = arg_int_value(cmd, major_ARG, -1);
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/* Persistent minor */
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if (arg_count(cmd, persistent_ARG)) {
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if (!strcmp(arg_str_value(cmd, persistent_ARG, "n"), "y")) {
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if (lp->minor == -1) {
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log_error("Please specify minor number with "
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"--minor when using -My");
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return 0;
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}
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if (lp->major == -1) {
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log_error("Please specify major number with "
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"--major when using -My");
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return 0;
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}
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} else {
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if ((lp->minor != -1) || (lp->major != -1)) {
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log_error("--major and --minor incompatible "
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"with -Mn");
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return 0;
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}
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}
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} else if (arg_count(cmd, minor_ARG) || arg_count(cmd, major_ARG)) {
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log_error("--major and --minor require -My");
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return 0;
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}
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lp->tag = arg_str_value(cmd, addtag_ARG, NULL);
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lcp->pv_count = argc;
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lcp->pvs = argv;
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return 1;
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}
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int lvcreate(struct cmd_context *cmd, int argc, char **argv)
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{
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int r = ECMD_PROCESSED;
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struct lvcreate_params lp;
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struct lvcreate_cmdline_params lcp;
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struct volume_group *vg;
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memset(&lp, 0, sizeof(lp));
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if (!_lvcreate_params(&lp, &lcp, cmd, argc, argv))
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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)) {
|
|
vg_release(vg);
|
|
stack;
|
|
return ECMD_FAILED;
|
|
}
|
|
|
|
if (!_update_extents_params(vg, &lp, &lcp)) {
|
|
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;
|
|
}
|