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Refactor the recent metadata-reading optimisation patches.
Remove the recently-added cache fields from struct labeller
and struct format_instance.
Instead, introduce struct lvmcache_vgsummary to wrap the VG information
that lvmcache holds and add the metadata size and checksum to it.
Allow this VG summary information to be looked up by metadata size +
checksum. Adjust the debug log messages to make it clear when this
shortcut has been successful.
(This changes the optimisation slightly, and might be extendable
further.)
Add struct cached_vg_fmtdata to format-specific vg_read calls to
preserve state alongside the VG across separate calls and indicate
if the details supplied match, avoiding the need to read and
process the VG metadata again.
Fixes segfault when 'pvs' encounters two different PVs sharing the same
uuid but one an orphan, the other in a VG.
If VG_GLOBAL is held, there seems no point in doing a full scan more
than once.
If undesirable side-effects show up, we can try restricting this to
VG_GLOBAL READ locks. The original code dates back to 2.02.40.
When pvscan --cache --major --minor command is issued from
udev REMOVE event, it basically resulted into a whole device
scan since the device was missing. So avoid such scan
and first check via /sysfs (when available) if such device actually
exists.
When available use nanosecond stat info.
If commands are running closely enough after config update,
the .cache file from persistent filter could have been ignored.
This happens sometimes during i.e. synthetic test suite run.
There is no reason to support persistent major/minor numbers
for pool volumes - it's only meant to be supported for filesystems
(since i.e. nfs may need to keep volume on a persistent device node.)
Support for pools is now explicitely disabled and documented.
Metadata areas which are marked as ignored should not be scanned
and read during pvscan --cache. Otherwise, this can cause lvmetad
to cache out-of-date metadata in case other PVs with fresh metadata
are missing by chance.
Make this to work like in non-lvmetad case where the behaviour would
be the same as if the PV was orphan (in case we have no other PVs
with valid non-ignored metadata areas).
Simplify the function usage and clean up parameter parsing.
There were 2 significant changes made in the test itself
(they passed before because of incorrect shell string handling)
-pvs_sel 'tags="pv_tag1"' "$dev1 $dev2"
+sel pv 'tags="pv_tag1"' "$dev1" "$dev6"
-lvs_sel '(lv_name=vol1 || lv_name=vol2) || vg_tags=vg_tag1' "vol1 vol2
abc orig snap"
+sel lv '(lv_name=vol1 || lv_name=vol2) || vg_tags=vg_tag1' vol1 vol2
orig snap xyz
The iscsi-shutdown.service is the one responsible for logging out
iscsi sessions so blk-availability.service (running the blkdeactivate
script) should be run before that on shutdown (so we need to use
After=iscsi-shutdown.service because "After" relates to starting
the service and the opposite order is automatically applied on
stopping the service at shutdown).
Avoid busy-looping on CPU while reading socket pipe
and always call read only when select tells there is
something for read.
Change the batch output to old nicer output.
When lvm1 PVs are visible, and lvmetad is used, and the foreign
option was included in the reporting command, the reporting
command would fail after the 'pvscan all devs' function saw
the lvm1 PVs. There is no reason the command should fail
because of the lvm1 PVs; they should just be ignored.
Return 1 on success in pvdisplay_short() and lvdisplay_full()
so commands like vgdisplay are not printinig stracktraces
on successful passes.
As the results of fail/success have been internally ignored for those
calls, it had no other visible side effect - command's return value was
still 0 (success).
Detect an lvm1 system id by looking at the WRITE_LOCKED flag.
Don't copy this lvm1 system id into vg->system_id so that the
restrictions associated with the new system id are not applied
to the old VG with the inherited lvm1 system id.
The string reported by uname -n may include characters
that lvm omits from the system id (like parens, as seen
on a test machine.) Check against the final system id
string that lvm uses.
