tools/vgreduce.c - manifest_repos/lvm2 - Git at Google

 /*
  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
  * Copyright (C) 2004-2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 #include "tools.h"

 struct vgreduce_params {
 	int force;
 	int fixed;
 	int already_consistent;
 };

 static int _remove_pv(struct volume_group *vg, struct pv_list *pvl, int silent)
 {
 	char uuid[64] __attribute__((aligned(8)));

 	if (vg->pv_count == 1) {
 		log_error("Volume Groups must always contain at least one PV");
 		return 0;
 	}

 	if (!id_write_format(&pvl->pv->id, uuid, sizeof(uuid)))
 		return_0;

 	log_verbose("Removing PV with UUID %s from VG %s", uuid, vg->name);

 	if (pvl->pv->pe_alloc_count) {
 		if (!silent)
 			log_error("LVs still present on PV with UUID %s: "
 				  "Can't remove from VG %s", uuid, vg->name);
 		return 0;
 	}

 	vg->free_count -= pvl->pv->pe_count;
 	vg->extent_count -= pvl->pv->pe_count;
 	del_pvl_from_vgs(vg, pvl);
 	free_pv_fid(pvl->pv);

 	return 1;
 }

 static int _consolidate_vg(struct cmd_context *cmd, struct volume_group *vg)
 {
 	struct pv_list *pvl;
 	struct lv_list *lvl;
 	int r = 1;

 	dm_list_iterate_items(lvl, &vg->lvs)
 		if (lv_is_partial(lvl->lv)) {
 			log_warn("WARNING: Partial LV %s needs to be repaired "
 				 "or removed. ", lvl->lv->name);
 			r = 0;
 		}

 	if (!r) {
 		cmd->handles_missing_pvs = 1;
 		log_error("There are still partial LVs in VG %s.", vg->name);
 		log_error("To remove them unconditionally use: vgreduce --removemissing --force.");
 		log_warn("Proceeding to remove empty missing PVs.");
 	}

 	dm_list_iterate_items(pvl, &vg->pvs) {
 		if (pvl->pv->dev && !is_missing_pv(pvl->pv))
 			continue;
 		if (r && !_remove_pv(vg, pvl, 0))
 			return_0;
 	}

 	return r;
 }

 static int _make_vg_consistent(struct cmd_context *cmd, struct volume_group *vg)
 {
 	struct lv_list *lvl;
 	struct logical_volume *lv;

 	cmd->partial_activation = 1;

  restart:
 	vg_mark_partial_lvs(vg, 1);

 	dm_list_iterate_items(lvl, &vg->lvs) {
 		lv = lvl->lv;

 		/* Are any segments of this LV on missing PVs? */
 		if (lv_is_partial(lv)) {
 			if (seg_is_raid(first_seg(lv))) {
 				if (!lv_raid_remove_missing(lv))
 					return_0;
 				goto restart;
 			}

 			if (lv_is_mirror(lv)) {
 				if (!mirror_remove_missing(cmd, lv, 1))
 					return_0;
 				goto restart;
 			}

 			if (arg_is_set(cmd, mirrorsonly_ARG) && !lv_is_mirrored(lv)) {
 				log_error("Non-mirror-image LV %s found: can't remove.", lv->name);
 				continue;
 			}

 			if (!lv_is_visible(lv))
 				continue;
 			log_warn("Removing partial LV %s.", lv->name);
 			if (!lv_remove_with_dependencies(cmd, lv, DONT_PROMPT, 0))
 				return_0;
 			goto restart;
 		}
 	}

 	_consolidate_vg(cmd, vg);

 	return 1;
 }

 /* Or take pv_name instead? */
 static int _vgreduce_single(struct cmd_context *cmd, struct volume_group *vg,
 			    struct physical_volume *pv,
 			    struct processing_handle *handle __attribute__((unused)))
 {
 	int r;

 	if (!vg_check_status(vg, EXPORTED_VG | LVM_WRITE | RESIZEABLE_VG))
 		return ECMD_FAILED;

 	r = vgreduce_single(cmd, vg, pv, 1);
 	if (!r)
 		return ECMD_FAILED;

 	return ECMD_PROCESSED;
 }

 static int _vgreduce_repair_single(struct cmd_context *cmd, const char *vg_name,
 		                   struct volume_group *vg, struct processing_handle *handle)
 {
 	struct vgreduce_params *vp = (struct vgreduce_params *) handle->custom_handle;

 	if (!vg_missing_pv_count(vg)) {
 		vp->already_consistent = 1;
 		return ECMD_PROCESSED;
 	}

 	if (!archive(vg))
 		return_ECMD_FAILED;

 	if (vp->force) {
 		if (!_make_vg_consistent(cmd, vg))
 			return_ECMD_FAILED;
 		vp->fixed = 1;
 	} else
 		vp->fixed = _consolidate_vg(cmd, vg);

 	if (!vg_write(vg) || !vg_commit(vg)) {
 		log_error("Failed to write out a consistent VG for %s", vg_name);
 		return ECMD_FAILED;
 	}

 	backup(vg);
 	return ECMD_PROCESSED;
 }

 int vgreduce(struct cmd_context *cmd, int argc, char **argv)
 {
 	struct processing_handle *handle;
 	struct vgreduce_params vp = { 0 };
 	const char *vg_name;
 	int repairing = arg_is_set(cmd, removemissing_ARG);
 	int saved_ignore_suspended_devices = ignore_suspended_devices();
 	int ret;

 	if (!argc && !repairing) {
 		log_error("Please give volume group name and "
 			  "physical volume paths");
 		return EINVALID_CMD_LINE;
 	}

 	if (!argc) { /* repairing */
 		log_error("Please give volume group name");
 		return EINVALID_CMD_LINE;
 	}

 	if (arg_is_set(cmd, mirrorsonly_ARG) && !repairing) {
 		log_error("--mirrorsonly requires --removemissing");
 		return EINVALID_CMD_LINE;
 	}

 	if (argc == 1 && !arg_is_set(cmd, all_ARG) && !repairing) {
 		log_error("Please enter physical volume paths or option -a");
 		return EINVALID_CMD_LINE;
 	}

 	if (argc > 1 && arg_is_set(cmd, all_ARG)) {
 		log_error("Option -a and physical volume paths mutually "
 			  "exclusive");
 		return EINVALID_CMD_LINE;
 	}

 	if (argc > 1 && repairing) {
 		log_error("Please only specify the volume group");
 		return EINVALID_CMD_LINE;
 	}

 	vg_name = skip_dev_dir(cmd, argv[0], NULL);
 	argv++;
 	argc--;

 	/* Needed to change the set of orphan PVs. */
 	if (!lockd_gl(cmd, "ex", 0))
 		return_ECMD_FAILED;
 	cmd->lockd_gl_disable = 1;

 	if (!(handle = init_processing_handle(cmd, NULL))) {
 		log_error("Failed to initialize processing handle.");
 		return ECMD_FAILED;
 	}
 	handle->custom_handle = &vp;

 	if (!repairing) {
 		/* FIXME: Pass private struct through to all these functions */
 		/* and update in batch afterwards? */
 		ret = process_each_pv(cmd, argc, argv, vg_name, 0, READ_FOR_UPDATE, handle, _vgreduce_single);
 		goto out;
 	}

 	/*
 	 * VG repair (removemissing)
 	 */

 	vp.force = arg_count(cmd, force_ARG);

 	cmd->handles_missing_pvs = 1;

 	init_ignore_suspended_devices(1);

 	process_each_vg(cmd, 0, NULL, vg_name, NULL,
 			READ_FOR_UPDATE | READ_ALLOW_EXPORTED,
 			0, handle, &_vgreduce_repair_single);

 	if (vp.already_consistent) {
 		log_print_unless_silent("Volume group \"%s\" is already consistent", vg_name);
 		ret = ECMD_PROCESSED;
 	} else if (vp.fixed) {
 		log_print_unless_silent("Wrote out consistent volume group %s", vg_name);
 		ret = ECMD_PROCESSED;
 	} else
 		ret = ECMD_FAILED;
 out:
 	init_ignore_suspended_devices(saved_ignore_suspended_devices);
 	destroy_processing_handle(cmd, handle);

 	return ret;
 }
	/*
	* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
	* Copyright (C) 2004-2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include "tools.h"

	struct vgreduce_params {
	int force;
	int fixed;
	int already_consistent;
	};

	static int _remove_pv(struct volume_group vg, struct pv_list pvl, int silent)
	{
	char uuid[64] __attribute__((aligned(8)));

	if (vg->pv_count == 1) {
	log_error("Volume Groups must always contain at least one PV");
	return 0;
	}

	if (!id_write_format(&pvl->pv->id, uuid, sizeof(uuid)))
	return_0;

	log_verbose("Removing PV with UUID %s from VG %s", uuid, vg->name);

	if (pvl->pv->pe_alloc_count) {
	if (!silent)
	log_error("LVs still present on PV with UUID %s: "
	"Can't remove from VG %s", uuid, vg->name);
	return 0;
	}

	vg->free_count -= pvl->pv->pe_count;
	vg->extent_count -= pvl->pv->pe_count;
	del_pvl_from_vgs(vg, pvl);
	free_pv_fid(pvl->pv);

	return 1;
	}

	static int _consolidate_vg(struct cmd_context cmd, struct volume_group vg)
	{
	struct pv_list *pvl;
	struct lv_list *lvl;
	int r = 1;

	dm_list_iterate_items(lvl, &vg->lvs)
	if (lv_is_partial(lvl->lv)) {
	log_warn("WARNING: Partial LV %s needs to be repaired "
	"or removed. ", lvl->lv->name);
	r = 0;
	}

	if (!r) {
	cmd->handles_missing_pvs = 1;
	log_error("There are still partial LVs in VG %s.", vg->name);
	log_error("To remove them unconditionally use: vgreduce --removemissing --force.");
	log_warn("Proceeding to remove empty missing PVs.");
	}

	dm_list_iterate_items(pvl, &vg->pvs) {
	if (pvl->pv->dev && !is_missing_pv(pvl->pv))
	continue;
	if (r && !_remove_pv(vg, pvl, 0))
	return_0;
	}

	return r;
	}

	static int _make_vg_consistent(struct cmd_context cmd, struct volume_group vg)
	{
	struct lv_list *lvl;
	struct logical_volume *lv;

	cmd->partial_activation = 1;

	restart:
	vg_mark_partial_lvs(vg, 1);

	dm_list_iterate_items(lvl, &vg->lvs) {
	lv = lvl->lv;

	/* Are any segments of this LV on missing PVs? */
	if (lv_is_partial(lv)) {
	if (seg_is_raid(first_seg(lv))) {
	if (!lv_raid_remove_missing(lv))
	return_0;
	goto restart;
	}

	if (lv_is_mirror(lv)) {
	if (!mirror_remove_missing(cmd, lv, 1))
	return_0;
	goto restart;
	}

	if (arg_is_set(cmd, mirrorsonly_ARG) && !lv_is_mirrored(lv)) {
	log_error("Non-mirror-image LV %s found: can't remove.", lv->name);
	continue;
	}

	if (!lv_is_visible(lv))
	continue;
	log_warn("Removing partial LV %s.", lv->name);
	if (!lv_remove_with_dependencies(cmd, lv, DONT_PROMPT, 0))
	return_0;
	goto restart;
	}
	}

	_consolidate_vg(cmd, vg);

	return 1;
	}

	/* Or take pv_name instead? */
	static int _vgreduce_single(struct cmd_context cmd, struct volume_group vg,
	struct physical_volume *pv,
	struct processing_handle *handle __attribute__((unused)))
	{
	int r;

	if (!vg_check_status(vg, EXPORTED_VG \| LVM_WRITE \| RESIZEABLE_VG))
	return ECMD_FAILED;

	r = vgreduce_single(cmd, vg, pv, 1);
	if (!r)
	return ECMD_FAILED;

	return ECMD_PROCESSED;
	}

	static int _vgreduce_repair_single(struct cmd_context cmd, const char vg_name,
	struct volume_group vg, struct processing_handle handle)
	{
	struct vgreduce_params vp = (struct vgreduce_params ) handle->custom_handle;

	if (!vg_missing_pv_count(vg)) {
	vp->already_consistent = 1;
	return ECMD_PROCESSED;
	}

	if (!archive(vg))
	return_ECMD_FAILED;

	if (vp->force) {
	if (!_make_vg_consistent(cmd, vg))
	return_ECMD_FAILED;
	vp->fixed = 1;
	} else
	vp->fixed = _consolidate_vg(cmd, vg);

	if (!vg_write(vg) \|\| !vg_commit(vg)) {
	log_error("Failed to write out a consistent VG for %s", vg_name);
	return ECMD_FAILED;
	}

	backup(vg);
	return ECMD_PROCESSED;
	}

	int vgreduce(struct cmd_context cmd, int argc, char *argv)
	{
	struct processing_handle *handle;
	struct vgreduce_params vp = { 0 };
	const char *vg_name;
	int repairing = arg_is_set(cmd, removemissing_ARG);
	int saved_ignore_suspended_devices = ignore_suspended_devices();
	int ret;

	if (!argc && !repairing) {
	log_error("Please give volume group name and "
	"physical volume paths");
	return EINVALID_CMD_LINE;
	}

	if (!argc) { /* repairing */
	log_error("Please give volume group name");
	return EINVALID_CMD_LINE;
	}

	if (arg_is_set(cmd, mirrorsonly_ARG) && !repairing) {
	log_error("--mirrorsonly requires --removemissing");
	return EINVALID_CMD_LINE;
	}

	if (argc == 1 && !arg_is_set(cmd, all_ARG) && !repairing) {
	log_error("Please enter physical volume paths or option -a");
	return EINVALID_CMD_LINE;
	}

	if (argc > 1 && arg_is_set(cmd, all_ARG)) {
	log_error("Option -a and physical volume paths mutually "
	"exclusive");
	return EINVALID_CMD_LINE;
	}

	if (argc > 1 && repairing) {
	log_error("Please only specify the volume group");
	return EINVALID_CMD_LINE;
	}

	vg_name = skip_dev_dir(cmd, argv[0], NULL);
	argv++;
	argc--;

	/* Needed to change the set of orphan PVs. */
	if (!lockd_gl(cmd, "ex", 0))
	return_ECMD_FAILED;
	cmd->lockd_gl_disable = 1;

	if (!(handle = init_processing_handle(cmd, NULL))) {
	log_error("Failed to initialize processing handle.");
	return ECMD_FAILED;
	}
	handle->custom_handle = &vp;

	if (!repairing) {
	/* FIXME: Pass private struct through to all these functions */
	/* and update in batch afterwards? */
	ret = process_each_pv(cmd, argc, argv, vg_name, 0, READ_FOR_UPDATE, handle, _vgreduce_single);
	goto out;
	}

	/*
	* VG repair (removemissing)
	*/

	vp.force = arg_count(cmd, force_ARG);

	cmd->handles_missing_pvs = 1;

	init_ignore_suspended_devices(1);

	process_each_vg(cmd, 0, NULL, vg_name, NULL,
	READ_FOR_UPDATE \| READ_ALLOW_EXPORTED,
	0, handle, &_vgreduce_repair_single);

	if (vp.already_consistent) {
	log_print_unless_silent("Volume group \"%s\" is already consistent", vg_name);
	ret = ECMD_PROCESSED;
	} else if (vp.fixed) {
	log_print_unless_silent("Wrote out consistent volume group %s", vg_name);
	ret = ECMD_PROCESSED;
	} else
	ret = ECMD_FAILED;
	out:
	init_ignore_suspended_devices(saved_ignore_suspended_devices);
	destroy_processing_handle(cmd, handle);

	return ret;
	}