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We should write metadata into next position in the ring buffer while calling
vgrename and vgcfgrestore. At this code level (_vg_write_raw), we were not able
to determine if this is a rename or not. If yes, then accompanying VG structure
passed here has a new name set, not the old one.
When looking for a location where to put metadata next, we were given a NULL
value because of failed VG name comparison (in _find_vg_rlocn) between the
name in existing metadata and metadata we're just about to write.
This resets the position in the ring buffer, overwriting any existing metadata
(and also incorrectly updates the cache to "orphan" afterwards).
This patch just adds old_name item in struct volume_group that we can check and use
if necessary and detect renames at lower layers as well.
The same applies for vgcfgrestore, but here we're using a special value of
old_name, an empty string, to disable the check with existing metadata totally.
This patch is all just cleanup and no other patch depends on it.
Replace explicit dereference and check with vg_is_exported().
Update a few copyrights and remove unnecessary whitespace.
Should be no functional change.
Adds pe_align_offset to 'struct physical_volume'; is initialized with
set_pe_align_offset(). After pe_start is established pe_align_offset is
added to it.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Run backup of metadata on remote nodes in the
same place like local node - when calling backup().
Introduce backup_locally() which calls only
local backup if needed.
Remote backup is now trigerred by LCK_VG_BACKUP flag
combination (special VG lock).
This lock type will call check_current_backup()
(including backup_locally() call) and updates
metadata on all nodes.
(Patch fixes non-functional remote backup,
current call during VG lock never triggers.)
This patch is not fully tested and leaves some related bugs unfixed.
Intended behaviour of the code now:
pe_start in the lvm2 format PV label header is set only by pvcreate (or
vgconvert -M2) and then preserved in *all* operations thereafter.
In some specialist cases, after the PV is added to a VG, the pe_start
field in the VG metadata may hold a different value and if so, it
overrides the other one for as long as the PV is in such a VG.
Currently, the field storing the size of the data area in the PV label
header always holds 0. As it only has meaning in the context of a
volume group, it is calculated whenever the PV is added to a VG (and can
be derived from extent_size and pe_count in the VG metadata).
Identical argument to previous patch which removed archive_enable() calls.
We add a new parameter to backup_init() which sets the enable value based
on the cmd->default_settings.backup value. This value was used to set
cmd->current_settings.backup, used in the removed backup_enable() call.
_init_backup() calls archive_init(), which originally set 'enabled' to
a hardcoded '1' value. This seems incorrect based on my read of other
areas of the code so here we add a 'enabled' paramter to archive_init().
We pass in cmd->default_settings.archive, which is obtained from the
config tree. Later in create_toolcontext, cmd->current_settings is
set to cmd->default_settings. The archive_enable() call we remove
here was using cmd->current_settings to set the 'archive' enable
value. The final value of cmd->archive_params->enabled should thus
be equivalent to the original code.
