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Include info in the temp file to confirm that it should be used.
The temp file is meant to suppress repeated, identical searches
for the same PVIDs on the same set of devices. Write to the file
a count and hash of the missing PVIDs and a count and hash of the
devices to search. A subsequent command will ignore and remove
the temp file if any of these values differ. We don't want to
suppress a search if a change has occured, and a missing PV could
be found by scanning devices.
- add new comparison between old and new entries, and use this
as the basis for new dedicated output for check and update
- add new --refresh option to search for missing PVIDs on all
devices, and possibly update the device ID
- internally, only use the term "refresh" for cases where a
new device ID may be found and assigned for a missing PVID
Incorrectly matching a dev to a devname id (due to changing devnames)
before matching the dev to a proper device id, can result in the
dev not being matched to the real id.
Fix some interactions between device IDs and hints. Hints
may limit the scanned devices which should not always trigger
a search for the PVs that were intentionally not scanned.
Hints should also be invalidated if they contain a device
that's become excluded by an internal filter such as the
device_id filter.
Search for a PV on other devices if it's a devname entry
and the name doesn't exist on the system. This restores
code that should not have been removed in commit 1901a47df
"device_id: fix conditions for device_ids_refresh"
Fix commit 847f1dd99c
"device_id: rewrite validation of devname entries"
which began calling device_ids_refresh() in cases where it
was unnecessary, leading to extra PV searches and warnings.
Specifically, a command like "lvs <vg>" would use the hints
file to scan only devices for the named VG. This means that
scanning other PVs would be skipped, and device IDs of those
PVs could not be validated because there are no PVID values
to verify. This missing info would cause messages about
the missing info, and would cause device_ids_refresh to
search for the PVs that had been intentionally skipped.
If the system changes, locate PVs that appear on different devices,
and update the device IDs in the devices file. A system change is
detected by saving the DMI product_uuid or hostname in the devices
file, and comparing it to the current system value. If a root PV
is restored or copied to a new system with different devices, then
the product_uuid or hostname should change, and trigger lvm to
locate PVIDs from system.devices on new devices.
Fix in the code that matches devices to system.devices entries when
the devices have the same serial number. A non-PV device in
system.devices has no pvid value, and the code was segfaulting
when checking the null pvid value.
In previous lvm versions, trailing spaces at the end of a t10 wwid would
be replaced with underscores, so the IDNAME string in system.devices
would look something like "t10.123_". Current versions of lvm ignore
trailing spaces in a t10 wwid, so the IDNAME string used would be
"t10.123". The different values would cause lvm to not recognize a
device in system.devices with the trailing _. Fix this by ignoring
trailing underscores in the IDNAME string from system.devices.
Replace spaces with \040 in directory paths from getmntent (mtab).
The recent commit 5374a44c57 compares mount point directory paths
from /etc/mtab and /proc/mounts, in order to detect when a mounted
LV has been renamed. The directory path comparison does not work
correctly when the path contains spaces because getmntent uses
ascii space chars and proc replaces spaces with \040.
There were a couple of cases where lvresize, without --fs resize,
was resizing the crypt layer above the LV. Resizing the crypt
layer should only be done when fs resizing is enabled (even if the
fs is already small enough due to being independently reduced.)
Also, check the size of the crypt device to see if it's already
been reduced independently, and skip the cryptsetup resize if
it's not needed.
The recent change that verifies sys_serial system.devices entries
using the PVID did not exclude non-PV devices from being checked.
The verification code would attempt to use du->pvid which was null
for the non-PVs causing a segfault.
Handle multiple devices using the same serial number as
their device id. After matching devices to devices file
entries, if there is a discrepency between the ondisk PVID
and the devices file PVID, then rematch devices to
devices file entries using PVID, looking at all disks
on the system with the same serial number.
Only /sys/dev/block/major:minor/device/serial was read to find
a disk serial number, but a serial number seems to be reported
more often in other locations, so check these also:
/sys/dev/block/major:minor/device/vpd_pg80
/sys/class/block/vda/serial (for virtio disks only)
The new device_id types are: wwid_naa, wwid_eui, wwid_t10.
The new types use the specific wwid type in their name.
lvm currently gets the values for these types by reading
the device's vpd_pg83 sysfs file (this could change in the
future if better methods become available for reading the
values.)
If a device is added to the devices file using one of these
types, prior versions of lvm will not recognize the types
and will be unable to use the devices.
When adding a new device, lvm continues to first use sys_wwid
from the sysfs wwid file. If the device has no sysfs wwid file,
lvm now attempts to use one of the new types from vpd_pg83.
If a devices file entry with type sys_wwid does not match a
given device's sysfs wwid file, the sys_wwid value will also
be compared to that device's other wwids from its vpd_pg83 file.
If the kernel changes the wwid type reported from the sysfs
wwid file, e.g. from a device's t10 id to its naa id, then lvm
should still be able to match it correctly using the vpd_pg83
data which will include both ids.
