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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
to back this out so you can do that commit, let me know. Also, if there's
an issue with the error message that's displayed, just change it in tools.h.
This causes a "device-mapper driver/module not loaded?" error message to
be displayed for the commands that require dm-mod, if the tools can't get
the driver version. It's not done for commands that don't require dm-mod.
This should clear up some problems people have had attempting to use lvm2
without rtfm'ing.
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.
o There is still a bit missing
+ all are missing the {PV,VG,LV} # - that is not applicable in LVM2
+ pvdisplay doesn't show how many LVs are contained on it
+ much of the snapshot information isn't available for lvdisplay
o Look at the code for other potiential FIXMEs :)
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 #defines for common lock flag combinations
o Try out hyphens instead of colons in device-mapper names - does this
make messages containing filenames easier to read?
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
all since it only supports vg_write. It has been replaced with:
int archive_vg(struct volume_group *vg,
const char *dir,
const char *desc,
uint32_t retain_days,
uint32_t min_archive);
which is now called directly by tools/archive.c
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
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).
