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Removes some incorrect and unnecessary checks for other entries
when adding a new devices. The removed checks and corrections were
mostly redundant with what is already done by device id matching.
Other checking is reworked so the warnings are a bit different.
When a device has a wwid (from sysfs), but lvm ignores the wwid,
e.g. because it contains an unreliable "QEMU" value, then lvm
falls back to using IDTYPE=devname (the device name) as the
device id. If the device name changes after reboot, then lvm
automatically searches for the PV on other devices to find the
new device name and correct system.devices. When searching for
the PV, lvm skips looking at devices that would use other id types,
e.g. if a device would use a wwid and not a devname, then it
skips checking it. However, it failed to account for the fact
that a device may have wwid that was ignored, in which case it
should be checked.
. error exit means that lvmdevices --update would make a change.
. remove check of PART field from --check because it isn't used.
. unlink searched_devnames file to ensure check|update will search
The approach to duplicate VGIDs has been that it is not possible
or not allowed, so the behavior has been undefined. The actual
result was unpredictable and/or broken, and generally unhelpful.
Improve this by recognizing the problem, displaying the VGs,
and printing a warning to fix the problem. Beyond this,
using VGs with duplicate VGIDs remains undefined, but should
work well enough to correct the problem with vgchange -u.
It's possible to create this condition without too much difficulty
by cloning PVs, followed by an incomplete attempt at making the two
VGs unique (vgrename and pvchange -u, but missing vgchange -u.)
After a vg_write, this function was used to attempt to
make lvmcache data match the new state written to disk.
It was not updated correctly in a many or most cases,
and the resulting lvmcache is not actually used after
vg_write, making the update unnecessary.
The destination vg is first written with the EXPORTED flag,
then the source vg is written, then the destination vg is
written again without the EXPORTED flag. Remove an unnecessary
vg_read of the destination vg just before the second write.
This reverts commit bd2baeaaa6.
This commit broke vgrename because vgrename relies on old bugs
in lvmcache_update_vg_from_write and lvmcache_update_vgname
which need to be fixed first.
The approach to duplicate VGIDs has been that it is not possible
or not allowed, so the behavior has been undefined. The actual
result was unpredictable and/or broken, and generally unhelpful.
Improve this by recognizing the problem, displaying the VGs,
and printing a warning to fix the problem. Beyond this,
using VGs with duplicate VGIDs remains undefined, but should
work well enough to correct the problem with vgchange -u.
It's possible to create this condition without too much difficulty
by cloning PVs, followed by an incomplete attempt at making the two
VGs unique (vgrename and pvchange -u, but missing vgchange -u.)
When storage is lost under a sanlock VG, and kill_vg/drop_vg
are used, sanlock_rem_lockspace() may return an error, but
the cleanup steps should still be performed. Without the
cleanup, gl_lsname_sanlock was not cleared. This caused
future lock requests to fail with ENOLS, but the NO_GL_LS
flag was not set due to gl_lsname_sanlock being set.
This caused lockd_global(sh) in lvm commands to fail when
they could succeed.
Fix from guozhonghua216
Since we check for present DM devices - cache result for
futher use of checking presence of such device.
lvm2 uses cache result for label scan, but also when
it tries to activate or deactivate LV - however only simple
target 'striped' is reasonably supported.
Use disable_dm_devs to be able to control when lv_info()
get cache or uncached results.
TODO: support more type, however this is getting very complicated.
New API extension (internal ATM) for getting a list
of active DM device with extra features like i.e. uuid.
To easily lookout for existing UUID in device list,
there is: dm_device_list_find_by_uuid()
Once the returned structure is no longer usable call:
dm_device_list_destroy()
Struct dm_active_device {} holds all the info,
but is always allocated and destroyed within library.
TODO: once it's stable, copy to libdm
We used to reset 'settings' to their defaults after command is finished.
This however has a drawback we lose all the logging after this point.
So this patch disables this 'reset' to observe for side-effects.
lvm shell should be getting reset when next command is run -
so this might or might not have some 'hidden' effects.
ATM it looks like nothing really bad should happen - we just should be
able to get more logs - at least from normal commands.
If the transient service remains after it's done, then
it prevents the same transient service from being run
again later if the PVs are detached and reattached
(although the behavior of a second autoactivation is not
well defined and may only work in limited cases.)
Description stolen from linux d/b/rbd.c L3:
rbd.c -- Export ceph rados objects as a Linux block device
16 partitions seem to make sense according to L90:
#define RBD_SINGLE_MAJOR_PART_SHIFT 4
Running *scan -vvvvvvdddddd yields
#filters/filter-type.c:28 /dev/rbd1p5: Skipping: Unrecognised LVM device type 252
#filters/filter-persistent.c:131 filter caching bad /dev/rbd1p5
right now, and adding
types = ["rbd", 252]
to /e/l/lvm.conf (with the matching "252 rbd" in /p/devices) works as a
per-machine fix:
rbd1 252:16 0 1T 1 disk
|-rbd1p1 252:17 0 243M 1 part
|-rbd1p2 252:18 0 1K 1 part
`-rbd1p5 252:21 0 1023.8G 1 part
`-dev01--vg-root 253:0 0 1023.8G 0 lvm
but rbd is supported by upstream so it'd be nice to have it work OOB
Fixes commit "pvscan: match device arg to filter symlink"
which failed to account for the fact that filter entries
are not just path names but include "a" or "r", etc.
The device_hint name in the metadata was meant to prevent
autoactivation from md components, but the name checks were
more general and would catch unnecessary cases.
This fixes an issue related to the optimization in
"pvscan: only add device args to dev cache"
If the devices file is not used, and the lvm.conf filter
accepts devices via symlink names, then those devices won't
be accepted by pvscan for autoactivation. To resolve this,
recognize when the filter contains symlinks and disable the
optimization. When the optimization is disabled, a full
dev_cache_scan is performed, and symlinks are associated
with the device names passed to pvscan. filter-regex
will accept a device if symlinks to that device are accepted.
Improve handling of md components that get through the
filter, like the previous improvement for multipath.
If md components get through the filter and trigger
duplicate PV code, then eliminate any devs entirely
that are not an md device.
If multipath component devices get through the filter and
cause lvm to see duplicate PVs, then check the wwid of the
devs and drop the component devices as if they had been
filtered. If a dm mpath device was found among the duplicates
then use that as the PV, otherwise do not use any of the
components as the PV.
"duplicate PVs" associated with multipath configs will no
longer stop commands from working.
Remove the searched_devnames file in a couple more places:
. When hints need refreshing it's possible that a missing
devices file entry could be found by searching devices
again.
. When a devices file entry devname is first found to be
incorrect, a new search for missing entries may be
useful.
When devnames are used as device ids and devnames change,
then new devices need to be located for the PVs. If the old
devname is now used by a filtered device, this was preventing
the code from searching for the new device, so the PV was
reported as missing.
