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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include "metadata.h"
#include "import-export.h"
#include "lvm-string.h"
/*
* Bitsets held in the 'status' flags get
* converted into arrays of strings.
*/
struct flag {
const uint64_t mask;
const char *description;
int kind;
};
static const struct flag _vg_flags[] = {
{EXPORTED_VG, "EXPORTED", STATUS_FLAG},
{RESIZEABLE_VG, "RESIZEABLE", STATUS_FLAG},
{PVMOVE, "PVMOVE", STATUS_FLAG},
{LVM_READ, "READ", STATUS_FLAG},
{LVM_WRITE, "WRITE", STATUS_FLAG},
{CLUSTERED, "CLUSTERED", STATUS_FLAG},
{SHARED, "SHARED", STATUS_FLAG},
{PARTIAL_VG, NULL, 0},
{PRECOMMITTED, NULL, 0},
{0, NULL, 0}
};
static const struct flag _pv_flags[] = {
{ALLOCATABLE_PV, "ALLOCATABLE", STATUS_FLAG},
{EXPORTED_VG, "EXPORTED", STATUS_FLAG},
{MISSING_PV, "MISSING", COMPATIBLE_FLAG},
{UNLABELLED_PV, NULL, 0},
{0, NULL, 0}
};
static const struct flag _lv_flags[] = {
{LVM_READ, "READ", STATUS_FLAG},
{LVM_WRITE, "WRITE", STATUS_FLAG},
{FIXED_MINOR, "FIXED_MINOR", STATUS_FLAG},
{VISIBLE_LV, "VISIBLE", STATUS_FLAG},
{PVMOVE, "PVMOVE", STATUS_FLAG},
{LOCKED, "LOCKED", STATUS_FLAG},
{LV_NOTSYNCED, "NOTSYNCED", STATUS_FLAG},
{LV_REBUILD, "REBUILD", STATUS_FLAG},
{RAID, NULL, 0},
{RAID_META, NULL, 0},
{RAID_IMAGE, NULL, 0},
{MIRROR_IMAGE, NULL, 0},
{MIRROR_LOG, NULL, 0},
{MIRRORED, NULL, 0},
{VIRTUAL, NULL, 0},
{SNAPSHOT, NULL, 0},
{MERGING, NULL, 0},
{CONVERTING, NULL, 0},
{PARTIAL_LV, NULL, 0},
{POSTORDER_FLAG, NULL, 0},
{VIRTUAL_ORIGIN, NULL, 0},
{REPLICATOR, NULL, 0},
{REPLICATOR_LOG, NULL, 0},
{THIN_VOLUME, NULL, 0},
{THIN_POOL, NULL, 0},
{THIN_POOL_DATA, NULL, 0},
{THIN_POOL_METADATA, NULL, 0},
{0, NULL, 0}
};
static const struct flag *_get_flags(int type)
{
switch (type & ~STATUS_FLAG) {
case VG_FLAGS:
return _vg_flags;
case PV_FLAGS:
return _pv_flags;
case LV_FLAGS:
return _lv_flags;
}
log_error("Unknown flag set requested.");
return NULL;
}
/*
* Converts a bitset to an array of string values,
* using one of the tables defined at the top of
* the file.
*/
int print_flags(uint64_t status, int type, char *buffer, size_t size)
{
int f, first = 1;
const struct flag *flags;
if (!(flags = _get_flags(type)))
return_0;
if (!emit_to_buffer(&buffer, &size, "["))
return 0;
for (f = 0; flags[f].mask; f++) {
if (status & flags[f].mask) {
status &= ~flags[f].mask;
if ((type & STATUS_FLAG) != flags[f].kind)
continue;
/* Internal-only flag? */
if (!flags[f].description)
continue;
if (!first) {
if (!emit_to_buffer(&buffer, &size, ", "))
return 0;
} else
first = 0;
if (!emit_to_buffer(&buffer, &size, "\"%s\"",
flags[f].description))
return 0;
}
}
if (!emit_to_buffer(&buffer, &size, "]"))
return 0;
if (status)
log_error("Metadata inconsistency: Not all flags successfully "
"exported.");
return 1;
}
int read_flags(uint64_t *status, int type, const struct dm_config_value *cv)
{
int f;
uint64_t s = UINT64_C(0);
const struct flag *flags;
if (!(flags = _get_flags(type)))
return_0;
if (cv->type == DM_CFG_EMPTY_ARRAY)
goto out;
while (cv) {
if (cv->type != DM_CFG_STRING) {
log_error("Status value is not a string.");
return 0;
}
for (f = 0; flags[f].description; f++)
if (!strcmp(flags[f].description, cv->v.str)) {
s |= flags[f].mask;
break;
}
if (type == VG_FLAGS && !strcmp(cv->v.str, "PARTIAL")) {
/*
* Exception: We no longer write this flag out, but it
* might be encountered in old backup files, so restore
* it in that case. It is never part of live metadata
* though, so only vgcfgrestore needs to be concerned
* by this case.
*/
s |= PARTIAL_VG;
} else if (!flags[f].description && (type & STATUS_FLAG)) {
log_error("Unknown status flag '%s'.", cv->v.str);
return 0;
}
cv = cv->next;
}
out:
*status |= s;
return 1;
}
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