mirror of
git://sourceware.org/git/lvm2.git
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6407d184d1
Refactor the recent metadata-reading optimisation patches. Remove the recently-added cache fields from struct labeller and struct format_instance. Instead, introduce struct lvmcache_vgsummary to wrap the VG information that lvmcache holds and add the metadata size and checksum to it. Allow this VG summary information to be looked up by metadata size + checksum. Adjust the debug log messages to make it clear when this shortcut has been successful. (This changes the optimisation slightly, and might be extendable further.) Add struct cached_vg_fmtdata to format-specific vg_read calls to preserve state alongside the VG across separate calls and indicate if the details supplied match, avoiding the need to read and process the VG metadata again.
994 lines
25 KiB
C
994 lines
25 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2011 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 "lib.h"
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#include "metadata.h"
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#include "import-export.h"
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#include "display.h"
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#include "toolcontext.h"
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#include "lvmcache.h"
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#include "lvmetad.h"
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#include "lv_alloc.h"
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#include "pv_alloc.h"
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#include "segtype.h"
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#include "text_import.h"
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#include "defaults.h"
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typedef int (*section_fn) (struct format_instance * fid,
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struct volume_group * vg, const struct dm_config_node * pvn,
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const struct dm_config_node * vgn,
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struct dm_hash_table * pv_hash,
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struct dm_hash_table * lv_hash,
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unsigned *scan_done_once,
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unsigned report_missing_devices);
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#define _read_int32(root, path, result) \
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dm_config_get_uint32(root, path, (uint32_t *) result)
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#define _read_uint32(root, path, result) \
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dm_config_get_uint32(root, path, result)
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#define _read_uint64(root, path, result) \
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dm_config_get_uint64(root, path, result)
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/*
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* Logs an attempt to read an invalid format file.
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*/
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static void _invalid_format(const char *str)
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{
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log_error("Can't process text format file - %s.", str);
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}
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/*
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* Checks that the config file contains vg metadata, and that it
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* we recognise the version number,
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*/
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static int _vsn1_check_version(const struct dm_config_tree *cft)
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{
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const struct dm_config_node *cn;
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const struct dm_config_value *cv;
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// TODO if this is pvscan --cache, we want this check back.
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if (lvmetad_active())
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return 1;
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/*
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* Check the contents field.
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*/
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if (!(cn = dm_config_find_node(cft->root, CONTENTS_FIELD))) {
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_invalid_format("missing contents field");
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return 0;
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}
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cv = cn->v;
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if (!cv || cv->type != DM_CFG_STRING || strcmp(cv->v.str, CONTENTS_VALUE)) {
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_invalid_format("unrecognised contents field");
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return 0;
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}
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/*
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* Check the version number.
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*/
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if (!(cn = dm_config_find_node(cft->root, FORMAT_VERSION_FIELD))) {
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_invalid_format("missing version number");
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return 0;
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}
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cv = cn->v;
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if (!cv || cv->type != DM_CFG_INT || cv->v.i != FORMAT_VERSION_VALUE) {
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_invalid_format("unrecognised version number");
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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 _is_converting(struct logical_volume *lv)
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{
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struct lv_segment *seg;
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if (lv_is_mirrored(lv)) {
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seg = first_seg(lv);
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/* Can't use is_temporary_mirror() because the metadata for
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* seg_lv may not be read in and flags may not be set yet. */
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if (seg_type(seg, 0) == AREA_LV &&
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strstr(seg_lv(seg, 0)->name, MIRROR_SYNC_LAYER))
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return 1;
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}
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return 0;
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}
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static int _read_id(struct id *id, const struct dm_config_node *cn, const char *path)
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{
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const char *uuid;
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if (!dm_config_get_str(cn, path, &uuid)) {
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log_error("Couldn't find uuid.");
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return 0;
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}
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if (!id_read_format(id, uuid)) {
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log_error("Invalid uuid.");
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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_flag_config(const struct dm_config_node *n, uint64_t *status, int type)
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{
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const struct dm_config_value *cv;
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*status = 0;
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if (!dm_config_get_list(n, "status", &cv)) {
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log_error("Could not find status flags.");
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return 0;
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}
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if (!(read_flags(status, type | STATUS_FLAG, cv))) {
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log_error("Could not read status flags.");
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return 0;
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}
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if (dm_config_get_list(n, "flags", &cv)) {
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if (!(read_flags(status, type, cv))) {
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log_error("Could not read flags.");
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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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static int _read_pv(struct format_instance *fid,
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struct volume_group *vg, const struct dm_config_node *pvn,
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const struct dm_config_node *vgn __attribute__((unused)),
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struct dm_hash_table *pv_hash,
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struct dm_hash_table *lv_hash __attribute__((unused)),
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unsigned *scan_done_once,
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unsigned report_missing_devices)
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{
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struct dm_pool *mem = vg->vgmem;
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struct physical_volume *pv;
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struct pv_list *pvl;
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const struct dm_config_value *cv;
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uint64_t size, ba_start;
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if (!(pvl = dm_pool_zalloc(mem, sizeof(*pvl))) ||
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!(pvl->pv = dm_pool_zalloc(mem, sizeof(*pvl->pv))))
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return_0;
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pv = pvl->pv;
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/*
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* Add the pv to the pv hash for quick lookup when we read
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* the lv segments.
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*/
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if (!dm_hash_insert(pv_hash, pvn->key, pv))
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return_0;
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if (!(pvn = pvn->child)) {
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log_error("Empty pv section.");
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return 0;
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}
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if (!_read_id(&pv->id, pvn, "id")) {
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log_error("Couldn't read uuid for physical volume.");
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return 0;
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}
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pv->is_labelled = 1; /* All format_text PVs are labelled. */
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/*
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* Convert the uuid into a device.
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*/
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if (!(pv->dev = lvmcache_device_from_pvid(fid->fmt->cmd, &pv->id, scan_done_once,
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&pv->label_sector))) {
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char buffer[64] __attribute__((aligned(8)));
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if (!id_write_format(&pv->id, buffer, sizeof(buffer)))
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buffer[0] = '\0';
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if (report_missing_devices)
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log_error_once("Couldn't find device with uuid %s.", buffer);
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else
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log_very_verbose("Couldn't find device with uuid %s.", buffer);
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}
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if (!(pv->vg_name = dm_pool_strdup(mem, vg->name)))
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return_0;
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memcpy(&pv->vgid, &vg->id, sizeof(vg->id));
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if (!_read_flag_config(pvn, &pv->status, PV_FLAGS)) {
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log_error("Couldn't read status flags for physical volume.");
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return 0;
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}
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/* TODO is the !lvmetad_active() too coarse here? */
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if (!pv->dev && !lvmetad_active())
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pv->status |= MISSING_PV;
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if ((pv->status & MISSING_PV) && pv->dev && pv_mda_used_count(pv) == 0) {
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pv->status &= ~MISSING_PV;
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log_info("Recovering a previously MISSING PV %s with no MDAs.",
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pv_dev_name(pv));
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}
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/* Late addition */
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if (dm_config_has_node(pvn, "dev_size") &&
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!_read_uint64(pvn, "dev_size", &pv->size)) {
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log_error("Couldn't read dev size for physical volume.");
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return 0;
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}
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if (!_read_uint64(pvn, "pe_start", &pv->pe_start)) {
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log_error("Couldn't read extent start value (pe_start) "
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"for physical volume.");
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return 0;
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}
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if (!_read_int32(pvn, "pe_count", &pv->pe_count)) {
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log_error("Couldn't find extent count (pe_count) for "
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"physical volume.");
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return 0;
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}
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/* Bootloader area is not compulsory - just log_debug for the record if found. */
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ba_start = size = 0;
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_read_uint64(pvn, "ba_start", &ba_start);
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_read_uint64(pvn, "ba_size", &size);
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if (ba_start && size) {
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log_debug("Found bootloader area specification for PV %s "
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"in metadata: ba_start=%" PRIu64 ", ba_size=%" PRIu64 ".",
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pv_dev_name(pv), ba_start, size);
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pv->ba_start = ba_start;
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pv->ba_size = size;
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} else if ((!ba_start && size) || (ba_start && !size)) {
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log_error("Found incomplete bootloader area specification "
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"for PV %s in metadata.", pv_dev_name(pv));
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return 0;
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}
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dm_list_init(&pv->tags);
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dm_list_init(&pv->segments);
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/* Optional tags */
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if (dm_config_get_list(pvn, "tags", &cv) &&
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!(read_tags(mem, &pv->tags, cv))) {
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log_error("Couldn't read tags for physical volume %s in %s.",
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pv_dev_name(pv), vg->name);
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return 0;
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}
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pv->pe_size = vg->extent_size;
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pv->pe_alloc_count = 0;
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pv->pe_align = 0;
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pv->fmt = fid->fmt;
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/* Fix up pv size if missing or impossibly large */
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if ((!pv->size || pv->size > (1ULL << 62)) && pv->dev) {
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if (!dev_get_size(pv->dev, &pv->size)) {
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log_error("%s: Couldn't get size.", pv_dev_name(pv));
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return 0;
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}
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log_verbose("Fixing up missing size (%s) "
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"for PV %s", display_size(fid->fmt->cmd, pv->size),
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pv_dev_name(pv));
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size = pv->pe_count * (uint64_t) vg->extent_size + pv->pe_start;
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if (size > pv->size)
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log_warn("WARNING: Physical Volume %s is too large "
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"for underlying device", pv_dev_name(pv));
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}
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if (!alloc_pv_segment_whole_pv(mem, pv))
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return_0;
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vg->extent_count += pv->pe_count;
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vg->free_count += pv->pe_count;
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add_pvl_to_vgs(vg, pvl);
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return 1;
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}
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static void _insert_segment(struct logical_volume *lv, struct lv_segment *seg)
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{
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struct lv_segment *comp;
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dm_list_iterate_items(comp, &lv->segments) {
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if (comp->le > seg->le) {
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dm_list_add(&comp->list, &seg->list);
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return;
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}
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}
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lv->le_count += seg->len;
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dm_list_add(&lv->segments, &seg->list);
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}
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static int _read_segment(struct logical_volume *lv, const struct dm_config_node *sn,
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struct dm_hash_table *pv_hash)
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{
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struct dm_pool *mem = lv->vg->vgmem;
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uint32_t area_count = 0u;
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struct lv_segment *seg;
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const struct dm_config_node *sn_child = sn->child;
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const struct dm_config_value *cv;
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uint32_t start_extent, extent_count;
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struct segment_type *segtype;
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const char *segtype_str;
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if (!sn_child) {
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log_error("Empty segment section.");
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return 0;
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}
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if (!_read_int32(sn_child, "start_extent", &start_extent)) {
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log_error("Couldn't read 'start_extent' for segment '%s' "
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"of logical volume %s.", sn->key, lv->name);
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return 0;
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}
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if (!_read_int32(sn_child, "extent_count", &extent_count)) {
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log_error("Couldn't read 'extent_count' for segment '%s' "
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"of logical volume %s.", sn->key, lv->name);
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return 0;
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}
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segtype_str = "striped";
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if (!dm_config_get_str(sn_child, "type", &segtype_str)) {
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log_error("Segment type must be a string.");
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return 0;
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}
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if (!(segtype = get_segtype_from_string(lv->vg->cmd, segtype_str)))
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return_0;
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if (segtype->ops->text_import_area_count &&
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!segtype->ops->text_import_area_count(sn_child, &area_count))
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return_0;
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if (!(seg = alloc_lv_segment(segtype, lv, start_extent,
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extent_count, 0, 0, NULL, area_count,
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extent_count, 0, 0, 0, NULL))) {
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log_error("Segment allocation failed");
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return 0;
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}
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if (seg->segtype->ops->text_import &&
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!seg->segtype->ops->text_import(seg, sn_child, pv_hash))
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return_0;
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/* Optional tags */
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if (dm_config_get_list(sn_child, "tags", &cv) &&
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!(read_tags(mem, &seg->tags, cv))) {
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log_error("Couldn't read tags for a segment of %s/%s.",
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lv->vg->name, lv->name);
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return 0;
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}
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/*
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* Insert into correct part of segment list.
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*/
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_insert_segment(lv, seg);
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if (seg_is_mirror(seg))
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lv->status |= MIRROR;
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if (seg_is_mirrored(seg))
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lv->status |= MIRRORED;
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if (seg_is_raid(seg))
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lv->status |= RAID;
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if (seg_is_virtual(seg))
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lv->status |= VIRTUAL;
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if (!seg_is_raid(seg) && _is_converting(lv))
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lv->status |= CONVERTING;
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return 1;
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}
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int text_import_areas(struct lv_segment *seg, const struct dm_config_node *sn,
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const struct dm_config_value *cv, struct dm_hash_table *pv_hash,
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uint64_t status)
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{
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unsigned int s;
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struct logical_volume *lv1;
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struct physical_volume *pv;
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const char *seg_name = dm_config_parent_name(sn);
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if (!seg->area_count) {
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log_error("Zero areas not allowed for segment %s", seg_name);
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return 0;
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}
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for (s = 0; cv && s < seg->area_count; s++, cv = cv->next) {
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/* first we read the pv */
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if (cv->type != DM_CFG_STRING) {
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log_error("Bad volume name in areas array for segment %s.", seg_name);
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return 0;
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}
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if (!cv->next) {
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log_error("Missing offset in areas array for segment %s.", seg_name);
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return 0;
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}
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if (cv->next->type != DM_CFG_INT) {
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log_error("Bad offset in areas array for segment %s.", seg_name);
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return 0;
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}
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/* FIXME Cope if LV not yet read in */
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if ((pv = dm_hash_lookup(pv_hash, cv->v.str))) {
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if (!set_lv_segment_area_pv(seg, s, pv, (uint32_t) cv->next->v.i))
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return_0;
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} else if ((lv1 = find_lv(seg->lv->vg, cv->v.str))) {
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if (!set_lv_segment_area_lv(seg, s, lv1,
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(uint32_t) cv->next->v.i,
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status))
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return_0;
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} else {
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log_error("Couldn't find volume '%s' "
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"for segment '%s'.",
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cv->v.str ? : "NULL", seg_name);
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return 0;
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}
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cv = cv->next;
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}
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/*
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* Check we read the correct number of stripes.
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*/
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if (cv || (s < seg->area_count)) {
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log_error("Incorrect number of areas in area array "
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"for segment '%s'.", seg_name);
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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_segments(struct logical_volume *lv, const struct dm_config_node *lvn,
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struct dm_hash_table *pv_hash)
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{
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const struct dm_config_node *sn;
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int count = 0, seg_count;
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for (sn = lvn; sn; sn = sn->sib) {
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/*
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* All sub-sections are assumed to be segments.
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*/
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if (!sn->v) {
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if (!_read_segment(lv, sn, pv_hash))
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return_0;
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count++;
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}
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/* FIXME Remove this restriction */
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if ((lv->status & SNAPSHOT) && count > 1) {
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log_error("Only one segment permitted for snapshot");
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return 0;
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}
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}
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if (!_read_int32(lvn, "segment_count", &seg_count)) {
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log_error("Couldn't read segment count for logical volume %s.",
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lv->name);
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return 0;
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}
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if (seg_count != count) {
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log_error("segment_count and actual number of segments "
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"disagree for logical volume %s.", lv->name);
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return 0;
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}
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/*
|
|
* Check there are no gaps or overlaps in the lv.
|
|
*/
|
|
if (!check_lv_segments(lv, 0))
|
|
return_0;
|
|
|
|
/*
|
|
* Merge segments in case someones been editing things by hand.
|
|
*/
|
|
if (!lv_merge_segments(lv))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _read_lvnames(struct format_instance *fid __attribute__((unused)),
|
|
struct volume_group *vg, const struct dm_config_node *lvn,
|
|
const struct dm_config_node *vgn __attribute__((unused)),
|
|
struct dm_hash_table *pv_hash __attribute__((unused)),
|
|
struct dm_hash_table *lv_hash,
|
|
unsigned *scan_done_once __attribute__((unused)),
|
|
unsigned report_missing_devices __attribute__((unused)))
|
|
{
|
|
struct dm_pool *mem = vg->vgmem;
|
|
struct logical_volume *lv;
|
|
const char *str;
|
|
const struct dm_config_value *cv;
|
|
const char *hostname;
|
|
uint64_t timestamp = 0, lvstatus;
|
|
|
|
if (!(lv = alloc_lv(mem)))
|
|
return_0;
|
|
|
|
if (!(lv->name = dm_pool_strdup(mem, lvn->key)))
|
|
return_0;
|
|
|
|
if (!(lvn = lvn->child)) {
|
|
log_error("Empty logical volume section.");
|
|
return 0;
|
|
}
|
|
|
|
if (!_read_flag_config(lvn, &lvstatus, LV_FLAGS)) {
|
|
log_error("Couldn't read status flags for logical volume %s.",
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (lvstatus & LVM_WRITE_LOCKED) {
|
|
lvstatus |= LVM_WRITE;
|
|
lvstatus &= ~LVM_WRITE_LOCKED;
|
|
}
|
|
lv->status = lvstatus;
|
|
|
|
if (dm_config_has_node(lvn, "creation_time")) {
|
|
if (!_read_uint64(lvn, "creation_time", ×tamp)) {
|
|
log_error("Invalid creation_time for logical volume %s.",
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
if (!dm_config_get_str(lvn, "creation_host", &hostname)) {
|
|
log_error("Couldn't read creation_host for logical volume %s.",
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
} else if (dm_config_has_node(lvn, "creation_host")) {
|
|
log_error("Missing creation_time for logical volume %s.",
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
|
|
lv->alloc = ALLOC_INHERIT;
|
|
if (dm_config_get_str(lvn, "allocation_policy", &str)) {
|
|
lv->alloc = get_alloc_from_string(str);
|
|
if (lv->alloc == ALLOC_INVALID) {
|
|
log_warn("WARNING: Ignoring unrecognised allocation policy %s for LV %s", str, lv->name);
|
|
lv->alloc = ALLOC_INHERIT;
|
|
}
|
|
}
|
|
|
|
if (dm_config_get_str(lvn, "profile", &str)) {
|
|
log_debug_metadata("Adding profile configuration %s for LV %s/%s.",
|
|
str, vg->name, lv->name);
|
|
lv->profile = add_profile(vg->cmd, str, CONFIG_PROFILE_METADATA);
|
|
if (!lv->profile) {
|
|
log_error("Failed to add configuration profile %s for LV %s/%s",
|
|
str, vg->name, lv->name);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!_read_int32(lvn, "read_ahead", &lv->read_ahead))
|
|
/* If not present, choice of auto or none is configurable */
|
|
lv->read_ahead = vg->cmd->default_settings.read_ahead;
|
|
else {
|
|
switch (lv->read_ahead) {
|
|
case 0:
|
|
lv->read_ahead = DM_READ_AHEAD_AUTO;
|
|
break;
|
|
case (uint32_t) -1:
|
|
lv->read_ahead = DM_READ_AHEAD_NONE;
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
}
|
|
|
|
/* Optional tags */
|
|
if (dm_config_get_list(lvn, "tags", &cv) &&
|
|
!(read_tags(mem, &lv->tags, cv))) {
|
|
log_error("Couldn't read tags for logical volume %s/%s.",
|
|
vg->name, lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_hash_insert(lv_hash, lv->name, lv))
|
|
return_0;
|
|
|
|
if (!link_lv_to_vg(vg, lv))
|
|
return_0;
|
|
|
|
if (timestamp && !lv_set_creation(lv, hostname, timestamp))
|
|
return_0;
|
|
|
|
if (!lv_is_visible(lv) && strstr(lv->name, "_pmspare")) {
|
|
if (vg->pool_metadata_spare_lv) {
|
|
log_error("Couldn't use another pool metadata spare "
|
|
"logical volume %s/%s.", vg->name, lv->name);
|
|
return 0;
|
|
}
|
|
log_debug_metadata("Logical volume %s is pool metadata spare.",
|
|
lv->name);
|
|
lv->status |= POOL_METADATA_SPARE;
|
|
vg->pool_metadata_spare_lv = lv;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _read_lvsegs(struct format_instance *fid,
|
|
struct volume_group *vg, const struct dm_config_node *lvn,
|
|
const struct dm_config_node *vgn __attribute__((unused)),
|
|
struct dm_hash_table *pv_hash,
|
|
struct dm_hash_table *lv_hash,
|
|
unsigned *scan_done_once __attribute__((unused)),
|
|
unsigned report_missing_devices __attribute__((unused)))
|
|
{
|
|
struct logical_volume *lv;
|
|
|
|
if (!(lv = dm_hash_lookup(lv_hash, lvn->key))) {
|
|
log_error("Lost logical volume reference %s", lvn->key);
|
|
return 0;
|
|
}
|
|
|
|
if (!(lvn = lvn->child)) {
|
|
log_error("Empty logical volume section.");
|
|
return 0;
|
|
}
|
|
|
|
/* FIXME: read full lvid */
|
|
if (!_read_id(&lv->lvid.id[1], lvn, "id")) {
|
|
log_error("Couldn't read uuid for logical volume %s.",
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(&lv->lvid.id[0], &lv->vg->id, sizeof(lv->lvid.id[0]));
|
|
|
|
if (!_read_segments(lv, lvn, pv_hash))
|
|
return_0;
|
|
|
|
lv->size = (uint64_t) lv->le_count * (uint64_t) vg->extent_size;
|
|
lv->minor = -1;
|
|
lv->major = -1;
|
|
|
|
if (lv->status & FIXED_MINOR) {
|
|
if (!_read_int32(lvn, "minor", &lv->minor)) {
|
|
log_error("Couldn't read minor number for logical "
|
|
"volume %s.", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_config_has_node(lvn, "major"))
|
|
/* If major is missing, pick default */
|
|
lv->major = vg->cmd->dev_types->device_mapper_major;
|
|
else if (!_read_int32(lvn, "major", &lv->major)) {
|
|
log_warn("WARNING: Couldn't read major number for logical "
|
|
"volume %s.", lv->name);
|
|
lv->major = vg->cmd->dev_types->device_mapper_major;
|
|
}
|
|
|
|
if (!validate_major_minor(vg->cmd, fid->fmt, lv->major, lv->minor)) {
|
|
log_warn("WARNING: Ignoring invalid major, minor number for "
|
|
"logical volume %s.", lv->name);
|
|
lv->major = lv->minor = -1;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _read_sections(struct format_instance *fid,
|
|
const char *section, section_fn fn,
|
|
struct volume_group *vg, const struct dm_config_node *vgn,
|
|
struct dm_hash_table *pv_hash,
|
|
struct dm_hash_table *lv_hash,
|
|
int optional,
|
|
unsigned *scan_done_once)
|
|
{
|
|
const struct dm_config_node *n;
|
|
/* Only report missing devices when doing a scan */
|
|
unsigned report_missing_devices = scan_done_once ? !*scan_done_once : 1;
|
|
|
|
if (!dm_config_get_section(vgn, section, &n)) {
|
|
if (!optional) {
|
|
log_error("Couldn't find section '%s'.", section);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
for (n = n->child; n; n = n->sib) {
|
|
if (!fn(fid, vg, n, vgn, pv_hash, lv_hash,
|
|
scan_done_once, report_missing_devices))
|
|
return_0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct volume_group *_read_vg(struct format_instance *fid,
|
|
const struct dm_config_tree *cft,
|
|
unsigned use_cached_pvs)
|
|
{
|
|
const struct dm_config_node *vgn;
|
|
const struct dm_config_value *cv;
|
|
const char *str, *format_str, *system_id;
|
|
struct volume_group *vg;
|
|
struct dm_hash_table *pv_hash = NULL, *lv_hash = NULL;
|
|
unsigned scan_done_once = use_cached_pvs;
|
|
uint64_t vgstatus;
|
|
|
|
/* skip any top-level values */
|
|
for (vgn = cft->root; (vgn && vgn->v); vgn = vgn->sib)
|
|
;
|
|
|
|
if (!vgn) {
|
|
log_error("Couldn't find volume group in file.");
|
|
return NULL;
|
|
}
|
|
|
|
if (!(vg = alloc_vg("read_vg", fid->fmt->cmd, vgn->key)))
|
|
return_NULL;
|
|
|
|
/*
|
|
* The pv hash memorises the pv section names -> pv
|
|
* structures.
|
|
*/
|
|
if (!(pv_hash = dm_hash_create(64))) {
|
|
log_error("Couldn't create pv hash table.");
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* The lv hash memorises the lv section names -> lv
|
|
* structures.
|
|
*/
|
|
if (!(lv_hash = dm_hash_create(1024))) {
|
|
log_error("Couldn't create lv hash table.");
|
|
goto bad;
|
|
}
|
|
|
|
vgn = vgn->child;
|
|
|
|
/* A backup file might be a backup of a different format */
|
|
if (dm_config_get_str(vgn, "format", &format_str) &&
|
|
!(vg->original_fmt = get_format_by_name(fid->fmt->cmd, format_str))) {
|
|
log_error("Unrecognised format %s for volume group %s.", format_str, vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (dm_config_get_str(vgn, "lock_type", &str)) {
|
|
if (!(vg->lock_type = dm_pool_strdup(vg->vgmem, str)))
|
|
goto bad;
|
|
}
|
|
|
|
if (!_read_id(&vg->id, vgn, "id")) {
|
|
log_error("Couldn't read uuid for volume group %s.", vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (!_read_int32(vgn, "seqno", &vg->seqno)) {
|
|
log_error("Couldn't read 'seqno' for volume group %s.",
|
|
vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (!_read_flag_config(vgn, &vgstatus, VG_FLAGS)) {
|
|
log_error("Error reading flags of volume group %s.",
|
|
vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* A system id without WRITE_LOCKED is an old lvm1 system id.
|
|
*/
|
|
if (dm_config_get_str(vgn, "system_id", &system_id)) {
|
|
if (!(vgstatus & LVM_WRITE_LOCKED)) {
|
|
if (!(vg->lvm1_system_id = dm_pool_zalloc(vg->vgmem, NAME_LEN + 1)))
|
|
goto_bad;
|
|
strncpy(vg->lvm1_system_id, system_id, NAME_LEN);
|
|
} else if (!(vg->system_id = dm_pool_strdup(vg->vgmem, system_id))) {
|
|
log_error("Failed to allocate memory for system_id in _read_vg.");
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
if (vgstatus & LVM_WRITE_LOCKED) {
|
|
vgstatus |= LVM_WRITE;
|
|
vgstatus &= ~LVM_WRITE_LOCKED;
|
|
}
|
|
vg->status = vgstatus;
|
|
|
|
if (!_read_int32(vgn, "extent_size", &vg->extent_size)) {
|
|
log_error("Couldn't read extent size for volume group %s.",
|
|
vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* 'extent_count' and 'free_count' get filled in
|
|
* implicitly when reading in the pv's and lv's.
|
|
*/
|
|
|
|
if (!_read_int32(vgn, "max_lv", &vg->max_lv)) {
|
|
log_error("Couldn't read 'max_lv' for volume group %s.",
|
|
vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (!_read_int32(vgn, "max_pv", &vg->max_pv)) {
|
|
log_error("Couldn't read 'max_pv' for volume group %s.",
|
|
vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (dm_config_get_str(vgn, "allocation_policy", &str)) {
|
|
vg->alloc = get_alloc_from_string(str);
|
|
if (vg->alloc == ALLOC_INVALID) {
|
|
log_warn("WARNING: Ignoring unrecognised allocation policy %s for VG %s", str, vg->name);
|
|
vg->alloc = ALLOC_NORMAL;
|
|
}
|
|
}
|
|
|
|
if (dm_config_get_str(vgn, "profile", &str)) {
|
|
log_debug_metadata("Adding profile configuration %s for VG %s.", str, vg->name);
|
|
vg->profile = add_profile(vg->cmd, str, CONFIG_PROFILE_METADATA);
|
|
if (!vg->profile) {
|
|
log_error("Failed to add configuration profile %s for VG %s", str, vg->name);
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
if (!_read_uint32(vgn, "metadata_copies", &vg->mda_copies)) {
|
|
vg->mda_copies = DEFAULT_VGMETADATACOPIES;
|
|
}
|
|
|
|
if (!_read_sections(fid, "physical_volumes", _read_pv, vg,
|
|
vgn, pv_hash, lv_hash, 0, &scan_done_once)) {
|
|
log_error("Couldn't find all physical volumes for volume "
|
|
"group %s.", vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
/* Optional tags */
|
|
if (dm_config_get_list(vgn, "tags", &cv) &&
|
|
!(read_tags(vg->vgmem, &vg->tags, cv))) {
|
|
log_error("Couldn't read tags for volume group %s.", vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (!_read_sections(fid, "logical_volumes", _read_lvnames, vg,
|
|
vgn, pv_hash, lv_hash, 1, NULL)) {
|
|
log_error("Couldn't read all logical volume names for volume "
|
|
"group %s.", vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (!_read_sections(fid, "logical_volumes", _read_lvsegs, vg,
|
|
vgn, pv_hash, lv_hash, 1, NULL)) {
|
|
log_error("Couldn't read all logical volumes for "
|
|
"volume group %s.", vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
if (!fixup_imported_mirrors(vg)) {
|
|
log_error("Failed to fixup mirror pointers after import for "
|
|
"volume group %s.", vg->name);
|
|
goto bad;
|
|
}
|
|
|
|
dm_hash_destroy(pv_hash);
|
|
dm_hash_destroy(lv_hash);
|
|
|
|
vg_set_fid(vg, fid);
|
|
|
|
/*
|
|
* Finished.
|
|
*/
|
|
return vg;
|
|
|
|
bad:
|
|
if (pv_hash)
|
|
dm_hash_destroy(pv_hash);
|
|
|
|
if (lv_hash)
|
|
dm_hash_destroy(lv_hash);
|
|
|
|
release_vg(vg);
|
|
return NULL;
|
|
}
|
|
|
|
static void _read_desc(struct dm_pool *mem,
|
|
const struct dm_config_tree *cft, time_t *when, char **desc)
|
|
{
|
|
const char *d;
|
|
unsigned int u = 0u;
|
|
int old_suppress;
|
|
|
|
old_suppress = log_suppress(1);
|
|
d = dm_config_find_str_allow_empty(cft->root, "description", "");
|
|
log_suppress(old_suppress);
|
|
*desc = dm_pool_strdup(mem, d);
|
|
|
|
(void) dm_config_get_uint32(cft->root, "creation_time", &u);
|
|
*when = u;
|
|
}
|
|
|
|
static int _read_vgname(const struct format_type *fmt, const struct dm_config_tree *cft,
|
|
struct lvmcache_vgsummary *vgsummary)
|
|
{
|
|
const struct dm_config_node *vgn;
|
|
struct dm_pool *mem = fmt->cmd->mem;
|
|
int old_suppress;
|
|
|
|
old_suppress = log_suppress(2);
|
|
vgsummary->creation_host =
|
|
dm_pool_strdup(mem, dm_config_find_str_allow_empty(cft->root, "creation_host", ""));
|
|
log_suppress(old_suppress);
|
|
|
|
/* skip any top-level values */
|
|
for (vgn = cft->root; (vgn && vgn->v); vgn = vgn->sib) ;
|
|
|
|
if (!vgn) {
|
|
log_error("Couldn't find volume group in file.");
|
|
return 0;
|
|
}
|
|
|
|
if (!(vgsummary->vgname = dm_pool_strdup(mem, vgn->key)))
|
|
return_0;
|
|
|
|
vgn = vgn->child;
|
|
|
|
if (!_read_id(&vgsummary->vgid, vgn, "id")) {
|
|
log_error("Couldn't read uuid for volume group %s.", vgsummary->vgname);
|
|
return 0;
|
|
}
|
|
|
|
if (!_read_flag_config(vgn, &vgsummary->vgstatus, VG_FLAGS)) {
|
|
log_error("Couldn't find status flags for volume group %s.",
|
|
vgsummary->vgname);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct text_vg_version_ops _vsn1_ops = {
|
|
.check_version = _vsn1_check_version,
|
|
.read_vg = _read_vg,
|
|
.read_desc = _read_desc,
|
|
.read_vgname = _read_vgname,
|
|
};
|
|
|
|
struct text_vg_version_ops *text_vg_vsn1_init(void)
|
|
{
|
|
return &_vsn1_ops;
|
|
}
|