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git://sourceware.org/git/lvm2.git
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0299a7af1e
Allow storing LV status bits with segment type name field. Switching to this since this field has better support for compatibility with older version of lvm2 - since such unknown segtype will not cause complete invisiblity of metadata from older lvm2 code - just the particular LV will become unusable with unknown type of segment.
274 lines
6.8 KiB
C
274 lines
6.8 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2017 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 "lvm-string.h"
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/*
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* Bitsets held in the 'status' flags get
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* converted into arrays of strings.
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*/
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struct flag {
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const uint64_t mask;
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const char *description;
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int kind;
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};
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static const struct flag _vg_flags[] = {
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{EXPORTED_VG, "EXPORTED", STATUS_FLAG},
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{RESIZEABLE_VG, "RESIZEABLE", STATUS_FLAG},
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{PVMOVE, "PVMOVE", STATUS_FLAG},
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{LVM_READ, "READ", STATUS_FLAG},
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{LVM_WRITE, "WRITE", STATUS_FLAG},
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{LVM_WRITE_LOCKED, "WRITE_LOCKED", COMPATIBLE_FLAG},
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{CLUSTERED, "CLUSTERED", STATUS_FLAG},
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{SHARED, "SHARED", STATUS_FLAG},
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{PARTIAL_VG, NULL, 0},
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{PRECOMMITTED, NULL, 0},
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{ARCHIVED_VG, NULL, 0},
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{0, NULL, 0}
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};
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static const struct flag _pv_flags[] = {
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{ALLOCATABLE_PV, "ALLOCATABLE", STATUS_FLAG},
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{EXPORTED_VG, "EXPORTED", STATUS_FLAG},
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{MISSING_PV, "MISSING", COMPATIBLE_FLAG},
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{UNLABELLED_PV, NULL, 0},
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{0, NULL, 0}
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};
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static const struct flag _lv_flags[] = {
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{LVM_READ, "READ", STATUS_FLAG},
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{LVM_WRITE, "WRITE", STATUS_FLAG},
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{LVM_WRITE_LOCKED, "WRITE_LOCKED", COMPATIBLE_FLAG},
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{FIXED_MINOR, "FIXED_MINOR", STATUS_FLAG},
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{VISIBLE_LV, "VISIBLE", STATUS_FLAG},
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{PVMOVE, "PVMOVE", STATUS_FLAG},
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{LOCKED, "LOCKED", STATUS_FLAG},
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{LV_NOTSYNCED, "NOTSYNCED", STATUS_FLAG},
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{LV_REBUILD, "REBUILD", STATUS_FLAG},
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{LV_RESHAPE_DELTA_DISKS_PLUS, "RESHAPE_DELTA_DISKS_PLUS", STATUS_FLAG},
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{LV_RESHAPE_DELTA_DISKS_MINUS, "RESHAPE_DELTA_DISKS_MINUS", STATUS_FLAG},
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{LV_REMOVE_AFTER_RESHAPE, "REMOVE_AFTER_RESHAPE", STATUS_FLAG},
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{LV_WRITEMOSTLY, "WRITEMOSTLY", STATUS_FLAG},
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{LV_ACTIVATION_SKIP, "ACTIVATION_SKIP", COMPATIBLE_FLAG},
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{LV_ERROR_WHEN_FULL, "ERROR_WHEN_FULL", COMPATIBLE_FLAG},
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{LV_METADATA_FORMAT, "METADATA_FORMAT", STATUS_FLAG},
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{LV_NOSCAN, NULL, 0},
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{LV_TEMPORARY, NULL, 0},
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{POOL_METADATA_SPARE, NULL, 0},
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{LOCKD_SANLOCK_LV, NULL, 0},
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{RAID, NULL, 0},
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{RAID_META, NULL, 0},
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{RAID_IMAGE, NULL, 0},
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{MIRROR, NULL, 0},
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{MIRROR_IMAGE, NULL, 0},
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{MIRROR_LOG, NULL, 0},
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{MIRRORED, NULL, 0},
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{VIRTUAL, NULL, 0},
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{SNAPSHOT, NULL, 0},
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{MERGING, NULL, 0},
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{CONVERTING, NULL, 0},
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{PARTIAL_LV, NULL, 0},
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{POSTORDER_FLAG, NULL, 0},
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{VIRTUAL_ORIGIN, NULL, 0},
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{REPLICATOR, NULL, 0},
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{REPLICATOR_LOG, NULL, 0},
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{THIN_VOLUME, NULL, 0},
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{THIN_POOL, NULL, 0},
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{THIN_POOL_DATA, NULL, 0},
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{THIN_POOL_METADATA, NULL, 0},
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{CACHE, NULL, 0},
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{CACHE_POOL, NULL, 0},
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{CACHE_POOL_DATA, NULL, 0},
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{CACHE_POOL_METADATA, NULL, 0},
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{LV_PENDING_DELETE, NULL, 0}, /* FIXME Display like COMPATIBLE_FLAG */
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{LV_REMOVED, NULL, 0},
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{0, NULL, 0}
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};
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static const struct flag *_get_flags(enum pv_vg_lv_e type)
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{
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switch (type) {
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case VG_FLAGS:
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return _vg_flags;
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case PV_FLAGS:
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return _pv_flags;
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case LV_FLAGS:
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return _lv_flags;
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}
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log_error(INTERNAL_ERROR "Unknown flag set requested.");
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return NULL;
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}
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/*
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* Converts a bitset to an array of string values,
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* using one of the tables defined at the top of
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* the file.
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*/
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int print_flags(char *buffer, size_t size, enum pv_vg_lv_e type, int mask, uint64_t status)
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{
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int f, first = 1;
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const struct flag *flags;
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if (!(flags = _get_flags(type)))
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return_0;
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if (!emit_to_buffer(&buffer, &size, "["))
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return_0;
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for (f = 0; flags[f].mask; f++) {
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if (status & flags[f].mask) {
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status &= ~flags[f].mask;
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if ((type & STATUS_FLAG) != flags[f].kind)
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continue;
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/* Internal-only flag? */
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if (!flags[f].description)
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continue;
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if (!first) {
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if (!emit_to_buffer(&buffer, &size, ", "))
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return_0;
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} else
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first = 0;
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if (!emit_to_buffer(&buffer, &size, "\"%s\"",
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flags[f].description))
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return_0;
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}
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}
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if (!emit_to_buffer(&buffer, &size, "]"))
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return_0;
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if (status)
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log_warn(INTERNAL_ERROR "Metadata inconsistency: "
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"Not all flags successfully exported.");
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return 1;
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}
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int read_flags(uint64_t *status, enum pv_vg_lv_e type, int mask, const struct dm_config_value *cv)
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{
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unsigned f;
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uint64_t s = UINT64_C(0);
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const struct flag *flags;
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if (!(flags = _get_flags(type)))
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return_0;
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if (cv->type == DM_CFG_EMPTY_ARRAY)
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goto out;
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while (cv) {
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if (cv->type != DM_CFG_STRING) {
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log_error("Status value is not a string.");
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return 0;
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}
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for (f = 0; flags[f].description; f++)
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if ((flags[f].kind & mask) &&
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!strcmp(flags[f].description, cv->v.str)) {
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s |= flags[f].mask;
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break;
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}
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if (type == VG_FLAGS && !strcmp(cv->v.str, "PARTIAL")) {
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/*
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* Exception: We no longer write this flag out, but it
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* might be encountered in old backup files, so restore
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* it in that case. It is never part of live metadata
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* though, so only vgcfgrestore needs to be concerned
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* by this case.
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*/
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s |= PARTIAL_VG;
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} else if (!flags[f].description && (mask & STATUS_FLAG)) {
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log_error("Unknown status flag '%s'.", cv->v.str);
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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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out:
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*status |= s;
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return 1;
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}
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/*
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* Parse extra status flags from segment "type" string.
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* These flags are seen as INCOMPATIBLE by any older lvm2 code.
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* All flags separated by '+' are trimmed from passed string.
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* All UNKNOWN flags will again cause the "UNKNOWN" segtype.
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*
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* Note: using these segtype status flags instead of actual
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* status flags ensures wanted incompatiblity.
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*/
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int read_segtype_lvflags(uint64_t *status, char *segtype_str)
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{
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unsigned i;
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const struct flag *flags = _lv_flags;
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char *delim;
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char *flag;
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if (!(delim = strchr(segtype_str, '+')))
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return 1; /* No flags */
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*delim = '\0'; /* Cut away 1st. '+' */
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do {
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flag = delim + 1;
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if ((delim = strchr(segtype_str, '+')))
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*delim = '\0';
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for (i = 0; flags[i].description; i++)
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if ((flags[i].kind & SEGTYPE_FLAG) &&
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!strcmp(flags[i].description, flag)) {
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*status |= flags[i].mask;
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break;
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}
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if (!flags[i].description) {
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log_error("Unknown flag %s passed with segment type %s.",
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flag, segtype_str);
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return 0; /* Unknown flag is incompatible */
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}
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} while (delim); /* Till no more flags in type appear */
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return 1;
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}
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int print_segtype_lvflags(char *buffer, size_t size, uint64_t status)
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{
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unsigned i;
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const struct flag *flags = _lv_flags;
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buffer[0] = 0;
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for (i = 0; flags[i].mask; i++)
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if ((flags[i].kind & SEGTYPE_FLAG) &&
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(status & flags[i].mask) &&
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!emit_to_buffer(&buffer, &size, "+%s",
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flags[i].description))
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return 0;
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return 1;
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}
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