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- logging is not controlled by "levels" but by "types"; types are
independent of each other... implementation of the usual "log level"
user-level semantics can be simply done on top; the immediate
application is enabling/disabling wire traffic logging independently
of other debug data, since the former is rather bulky and can easily
obscure almost everything else
- all logs go to "outlets", of which we currently have 2: syslog and
stderr; which "types" go to which "outlets" is entirely configurable
Always store discard setting in LV metadata. (Note that lvcreate_params
doesn't yet use --discard to set the initial value.)
Remove undocumented env var LVM_THIN_VERSION_MIN that has no use on a
live system.
Change verbose 'feature not found' messages to debug.
Use discard_str for string value of discard.
I think it's better not to abbreviate human-readable fields like
'discard' to a single character. Users can truncate it to the
first character themselves if they wish.
It's confusing to use the variable name discard for different things in
different places - use discard_str when it's a string not the enum.
Respond with "unknown" rather than a NULL pointer if there's an
internal error and the discard value is invalid.
Don't accept 'no_passdown' or 'no-passdown' variants in the LVM
metadata: this is written by the program so should only ever contain
"nopassdown" and should be validated strictly against that.
Remove the limit for major and minor number arguments used while specifying
persistent numbers via -My --major <major> --minor <minor> option which
was set to 255 before. Follow the kernel limit instead which is 12 bits
for major and 20 bits for minor number (kernel >= 2.6 and LVM formats
that does not have FMT_RESTRICTED_LVIDS - so still keep the old limit
of 255 for lvm1 format).
The lvm2 activation generator generates systemd units conditionally
based on the global/use_lvmetad lvm.conf setting.
If use_lvmetad=0, the lvm2-activation-early.service and lvm2-activation.service
units will be generated. These units are responsible for direct volume activation
by calling "vgchange -aay --sysinit" (this is actually the original on-boot
activation as it was used before). If use_lvmetad=1, no units will be generated
as we're relying on autoactivation.
Important thing to note is that the lvm2-activation units normally bring
in the udev-settle ("storage-wait") service that waits for udev to settle
(with block devices). We don't need this if lvmetad is used in conjunction
with autoactivation feature... but systemd units can't be enabled or disabled
(or dependencies added/removed) dynamically based on external configuration.
Therefore, we need the unit generator which adds support for such situations:
the units as a whole either exist or not based on the external configuration.
