Version 2.02.75 -
=====================================
+ Add global/metadata_read_only to use unrepaired metadata in read-only cmds.
Don't take write lock in vgchange --refresh, --poll or --monitor.
Skip dm devices in scan if they contain only error targets or are empty.
Fix strict-aliasing compile warning in partition table scanning.
# Treat any internal errors as fatal errors, aborting the process that
# encountered the internal error. Please only enable for debugging.
abort_on_internal_errors = 0
+
+ # If set to 1, no operations that change on-disk metadata will be permitted.
+ # Additionally, read-only commands that encounter metadata in need of repair
+ # will still be allowed to proceed exactly as if the repair had been
+ # performed (except for the unchanged vg_seqno).
+ # Inappropriate use could mess up your system, so seek advice first!
+ metadata_read_only = 0
}
activation {
if ((cv->type != CFG_STRING) || !cv->v.str[0])
log_error("Ignoring invalid activation/mlock_filter entry in config file");
+ cmd->metadata_read_only = find_config_tree_int(cmd, "global/metadata_read_only",
+ DEFAULT_METADATA_READ_ONLY);
+
return 1;
}
unsigned handles_unknown_segments:1;
unsigned partial_activation:1;
unsigned si_unit_consistency:1;
+ unsigned metadata_read_only:1;
struct dev_filter *filter;
int dump_filter; /* Dump filter when exiting? */
#define DEFAULT_WAIT_FOR_LOCKS 1
#define DEFAULT_PRIORITISE_WRITE_LOCKS 1
#define DEFAULT_USE_MLOCKALL 0
+#define DEFAULT_METADATA_READ_ONLY 0
#define DEFAULT_MIRRORLOG "disk"
#define DEFAULT_MIRROR_LOG_FAULT_POLICY "allocate"
return 0;
}
+ if (cmd->metadata_read_only &&
+ ((flags & LCK_TYPE_MASK) == LCK_WRITE) &&
+ strcmp(resource, VG_GLOBAL)) {
+ log_error("Operation prohibited while global/metadata_read_only is set.");
+ return 0;
+ }
+
if ((ret = _locking.lock_resource(cmd, resource, flags))) {
if ((flags & LCK_SCOPE_MASK) == LCK_VG &&
!(flags & LCK_CACHE)) {
/* FIXME Also ensure contents same - checksum compare? */
if (correct_vg->seqno != vg->seqno) {
- inconsistent = 1;
- inconsistent_seqno = 1;
+ if (cmd->metadata_read_only)
+ log_very_verbose("Not repairing VG %s metadata seqno (%d != %d) "
+ "as global/metadata_read_only is set.",
+ vgname, vg->seqno, correct_vg->seqno);
+ else {
+ inconsistent = 1;
+ inconsistent_seqno = 1;
+ }
if (vg->seqno > correct_vg->seqno) {
vg_release(correct_vg);
correct_vg = vg;
}
}
- if (dm_list_size(&correct_vg->pvs) != dm_list_size(pvids)
- + vg_missing_pv_count(correct_vg)) {
+ if (dm_list_size(&correct_vg->pvs) !=
+ dm_list_size(pvids) + vg_missing_pv_count(correct_vg)) {
log_debug("Cached VG %s had incorrect PV list",
vgname);
/* FIXME Also ensure contents same - checksums same? */
if (correct_vg->seqno != vg->seqno) {
- inconsistent = 1;
- inconsistent_seqno = 1;
+ /* Ignore inconsistent seqno if told to skip repair logic */
+ if (cmd->metadata_read_only)
+ log_very_verbose("Not repairing VG %s metadata seqno (%d != %d) "
+ "as global/metadata_read_only is set.",
+ vgname, vg->seqno, correct_vg->seqno);
+ else {
+ inconsistent = 1;
+ inconsistent_seqno = 1;
+ }
if (!_update_pv_list(cmd->mem, &all_pvs, vg)) {
vg_release(vg);
vg_release(correct_vg);
xx(dumpconfig,
"Dump active configuration",
- 0,
+ PERMITTED_READ_ONLY,
"dumpconfig "
"\t[-f|--file filename] " "\n"
"[ConfigurationVariable...]\n",
xx(formats,
"List available metadata formats",
- 0,
+ PERMITTED_READ_ONLY,
"formats\n")
xx(help,
"Display help for commands",
- 0,
+ PERMITTED_READ_ONLY,
"help <command>" "\n")
/*********
xx(lvchange,
"Change the attributes of logical volume(s)",
- CACHE_VGMETADATA,
+ CACHE_VGMETADATA | PERMITTED_READ_ONLY,
"lvchange\n"
"\t[-A|--autobackup y|n]\n"
"\t[-a|--available [e|l]y|n]\n"
xx(lvdisplay,
"Display information about a logical volume",
- 0,
+ PERMITTED_READ_ONLY,
"lvdisplay\n"
"\t[-a|--all]\n"
"\t[-c|--colon]\n"
xx(lvmdiskscan,
"List devices that may be used as physical volumes",
- 0,
+ PERMITTED_READ_ONLY,
"lvmdiskscan\n"
"\t[-d|--debug]\n"
"\t[-h|--help]\n"
xx(lvs,
"Display information about logical volumes",
- 0,
+ PERMITTED_READ_ONLY,
"lvs" "\n"
"\t[-a|--all]\n"
"\t[--aligned]\n"
xx(lvscan,
"List all logical volumes in all volume groups",
- 0,
+ PERMITTED_READ_ONLY,
"lvscan " "\n"
"\t[-a|--all]\n"
"\t[-b|--blockdevice] " "\n"
xx(pvdisplay,
"Display various attributes of physical volume(s)",
- CACHE_VGMETADATA,
+ CACHE_VGMETADATA | PERMITTED_READ_ONLY,
"pvdisplay\n"
"\t[-c|--colon]\n"
"\t[-d|--debug]\n"
xx(pvs,
"Display information about physical volumes",
- CACHE_VGMETADATA,
+ CACHE_VGMETADATA | PERMITTED_READ_ONLY,
"pvs" "\n"
"\t[-a|--all]\n"
"\t[--aligned]\n"
xx(pvscan,
"List all physical volumes",
- 0,
+ PERMITTED_READ_ONLY,
"pvscan " "\n"
"\t[-d|--debug] " "\n"
"\t{-e|--exported | -n|--novolumegroup} " "\n"
xx(segtypes,
"List available segment types",
- 0,
+ PERMITTED_READ_ONLY,
"segtypes\n")
xx(vgcfgbackup,
"Backup volume group configuration(s)",
- 0,
+ PERMITTED_READ_ONLY,
"vgcfgbackup " "\n"
"\t[-d|--debug] " "\n"
"\t[-f|--file filename] " "\n"
xx(vgchange,
"Change volume group attributes",
- CACHE_VGMETADATA,
+ CACHE_VGMETADATA | PERMITTED_READ_ONLY,
"vgchange" "\n"
"\t[-A|--autobackup {y|n}] " "\n"
"\t[--alloc AllocationPolicy] " "\n"
xx(vgdisplay,
"Display volume group information",
- 0,
+ PERMITTED_READ_ONLY,
"vgdisplay " "\n"
"\t[-A|--activevolumegroups]" "\n"
"\t[-c|--colon | -s|--short | -v|--verbose]" "\n"
xx(vgs,
"Display information about volume groups",
- 0,
+ PERMITTED_READ_ONLY,
"vgs" "\n"
"\t[--aligned]\n"
"\t[-a|--all]\n"
xx(vgscan,
"Search for all volume groups",
- 0,
+ PERMITTED_READ_ONLY,
"vgscan "
"\t[-d|--debug]\n"
"\t[-h|--help]\n"
xx(version,
"Display software and driver version information",
- 0,
+ PERMITTED_READ_ONLY,
"version\n" )
if ((ret = _process_common_commands(cmd)))
goto_out;
+ if (cmd->metadata_read_only &&
+ !(cmd->command->flags & PERMITTED_READ_ONLY)) {
+ log_error("%s: Command not permitted while global/metadata_read_only "
+ "is set.", cmd->cmd_line);
+ goto out;
+ }
+
if (arg_count(cmd, nolocking_ARG))
locking_type = 0;
else
/* void *ptr; // Currently not used. */
};
-#define CACHE_VGMETADATA 0x00000001
+#define CACHE_VGMETADATA 0x00000001
+#define PERMITTED_READ_ONLY 0x00000002
/* a register of the lvm commands */
struct command {