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Lots of changes/very little testing so far => there'll be bugs!
Use 'vgcreate -M text' to create a volume group with its metadata stored
in text files. Text format metadata changes should be reasonably atomic,
with a (basic) automatic recovery mechanism if the system crashes while a
change is in progress.
Add a metadata section to lvm.conf to specify multiple directories if
you want (recommended) to keep multiple copies of the metadata (eg on
different filesystems).
e.g. metadata {
dirs = ["/etc/lvm/metadata1","/usr/local/lvm/metadata2"]
}
Plenty of refinements still in the pipeline.
from lock_vol() - otherwise it now attempts to acquire the lock and then
immediately releases it.
o Extend the id field in struct logical_volume to hold VG uuid + LV uuid
for format1. This unique lvid can be used directly when calling lock_vol().
o Add the VG uuid to vgcache to make VG uuid lookups possible. (Another
step towards using them instead of VG names internally.)
and add severe warning if it's used to make a device seem bigger than
it really is. This is not an option people should be using as it
breaks metadata integrity.
o Use uint64_t throughout (rather than unsigned long long)
o Convert a few messages that contain pathnames into the more common form:
pathname: message
I'm taking a different route from LVM1 here in that snapshots are a
seperate entity from the logical volumes, I think of them as an
application of an LV (or two lvs rather). As such there is a list of
snapshots held against the vg, and there is *not* a SNAPSHOT, or
SHAPSHOT_ORG flag in lv->status.
o Text format now has a description and time field at the top level.
o archiving and backup set the description appropriately. eg,
for an archive:
description = "Created *before* executing 'lvextend test_vg/lvol0 -l +1'."
creation_time = 1013166332
for a backup:
description = "Created *after* executing 'lvextend test_vg/lvol0 -l +1'."
creation_time = 1013166332
This is preparing the way for a simple vgcfgundo command.
slightly different from the current LVM1 method.
lvcreate --persistent y --minor 10 (to specify when created)
lvchange --persistent n (to turn off)
lvchange --persistent y --minor 11 (to change)
--persistent uses a new LV status flag stored on disk
minor number is stored on disk the same way as LVM1 does
(but major number stored is 0; any LVM1 major/minor setting gets lost)
lvchange -ay --minor 12 (to activate using minor 12, regardless of the
on-disk setting, which doesn't get changed)
--minor == -m
--persistent == -M
by allocating the data block with an additional dbg_malloc.
o Added an assertion to check that no one is requesting alternate
alignment for memory allocated from pool. I can't see us needing this
for LVM2.
struct pv_list {
struct list list;
struct physical_volume pv;
};
to
struct pv_list {
struct list list;
struct physical_volume *pv;
};
o New function in toollib 'create_pv_list', which creates a list of pv's
from a given command line array of pv's.
o Changed lvcreate/extend to use this (fixes lvextend [pv list] bug).
onto a new device). uuid specified must not already exist on the system.
o More message tidying.
o When checking for label, only read PV metadata.
o Add ataraid. [Needs moving into config/defaults files.]
is active in the device-mapper.
o Many operations can be carried out regardless of whether the VG is
active or not.
o vgscan does not activate anything - use vgchange.
o Change lvrename to support renaming of active LVs.
o Remove '//' appearing in some pathnames.
o Dummy lv_check_segments() for compilation.
A substantial speed-up - particularly in readline mode.
If the hints turn out to be wrong, the relevant parts get thrown away.
vgscan destroys it totally. In both cases it then rebuilds itself as
required.
o Changed pv_map.c to maintain the list of free areas in size order, which
is more helpful to the allocators. If you want to allocate a bit of an
area call consume_area(area, size), this will adjust the area if there's
some space left and shuffle it to the correct place in the list.
Not tested.
