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Clear many compiler warnings (i386) & associated bugs - hopefully without
introducing too many new bugs:-) (Same exercise required for other archs.)
Default compilation has optimisation - or else use ./configure --enable-debug
allocation policy. This can currently take one of three values:
typedef enum {
ALLOC_NEXT_FREE,
ALLOC_STRICT,
ALLOC_CONTIGUOUS
} alloc_policy_t;
Notice that 'SIMPLE' has turned into the slightly more meaningful NEXT_FREE.
ii) Put code into display.[hc] for converting one of these enums to a
text representation and back again.
ii) Updated the text format so this also has the alloc_policy field.
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.)
o Use first unused lv_number when creating new LV
o Use lv_number for refs to snapshots
o Update persistent minor logic after the lvcreate restructure
o Reset all parameters before use in lvcreate.
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.
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
missing from a VG. (Linear targets use the device-mapper 'error' target
which returns ioerror; striped targets use '/dev/ioerror' for now - which must
already exist e.g. as a sufficiently large block device version of /dev/zero).
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.]
o updated vgcfgrestore args
o change _check_for_open_devices only to check devices present in the hash
table instead of using dev_iter which triggers a full scan even when only
displaying command line help
o roll vgcache back to agk's implementation, we'll revisit this as part
of the cluster integration.
o change the extra_info field in a label to be a void *
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.
logical volumes. It includes:
format1 changes.
metadata.h changes.
lv_manip.c changed (striped allocation still not done though).
activate.c changes.
Nothing has been near a compiler as yet.
Alasdair can you look at changing display.c to use to output the mappings
in a more segment oriented format please ?
I haven't put the span list into struct physical_volume to represent allocated
extents. I think the burden of maintaining it for things like lv_extend may
out weigh it's uses.
o Changed disk-rep to use these
o if NDEBUG is not defined the dev_cache will check for open devices on
teardown.
I was hoping this would speed things up. But I'm still getting:
reti:/home/joe/sistina/LVM2/tools# time ./lvm vgchange -a n
Volume group vg0 successfully changed
real 0m5.751s
user 0m0.060s
sys 0m0.070s
even though I have only 1 device with the vg on it passing the filters.
o Full signed arguments to lvreduce/lvextend
o Consistent lv_number/pe map use
o Populate pv->pe_allocated
o Fixes for allocation/writing of multiple LVs
