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The recent command definitions commit took the command
name from argv[0] without applying basename to the value,
so a pathname, e.g. /usr/sbin, would cause lvm to not
recognize the command name.
Repairing missing devices does not work reliably
with lvmetad, so disable lvmetad before repair.
A standard lvmetad refresh (pvscan --cache) will
enable lvmetad again.
When a given command:
- matches command definition A based on required options,
but uses optional options that are not accepted by A.
- matches command definition B based on required options,
(but fewer required items than A), and uses no
unaccepted optional options.
then B is the correct choice. Command A would fail because
of the unaccepted optional options. The logic was mistakenly
letting A win because it had a greater number of required option
matches, without accounting for the optional option mismatches.
As was recently done with relative signes for sizes/extents,
limit the signs used with the mirrors option, e.g.
lvcreate --mirrors now does not accept or advertise an
optional minus sign with the value. lvconvert --mirrors
accepts +|-.
OO_LVCREATE_CACHE accepts --cachemetadataformat.
Support new option --cachemetadataformat auto|1|2 for caching.
Word 'auto' can be also be given as '0'.
Add new values for different sign variations, resulting in:
size_VAL no sign accepted
ssize_VAL accepts + or -
psize_VAL accepts +
nsize_VAL accpets -
extents_VAL no sign accepted
sextents_VAL accepts + or -
pextents_VAL accepts +
nextents_VAL accepts -
Depending on the command being run, change the option
values for --size, --extents, --poolmetadatasize to
use the appropriate value from above.
lvcreate uses no sign (but accepts + and ignores it).
lvresize accepts +|- for a relative change.
lvextend accepts + for a relative change.
lvreduce accepts - for a relative change.
Like opt and val arrays in previous commit, combine duplicate
arrays for lv types and props in command.c and lvmcmdline.c.
Also move the command_names array to be defined in command.c
so it's consistent with the others.
command.c and lvmcmdline.c each had a full array defining
all options and values. This duplication was not removed
when the command.c code was merged into the run time.
Clean up and correct the details around --extents and --size.
lvcreate/lvresize/lvreduce/lvextend all now display the
extents option in usages.
The Size and Number value variables for --size and --extents
are now displayed without the [+|-] prefix for lvcreate.
There was confusion in the code about whether or not the
--size option accepted a sign. Make it consistent and clear
that it does.
This exposes a new problem in that an option can only
accept one value type, e.g. --size can only accept a
signed number, it cannot accept a positive or negative
number for some commands and reject negative numbers for
others.
In practice, lvcreate accepts only positive --size
values and lvresize accepts positive or negative --size
values. There is currently no way to encode this
difference. Until that is fixed, the man page output
is hacked to avoid printing the [+|-] prefix for sizes
in lvcreate.
Settings specified in other command line args take precedence over
profiles and --config, which takes precedence over settings in actual
config files.
Since commit 1e2420bca8 ('commands: new
method for defining commands') commands like this:
lvchange --config 'global/test=1' -ay vg
have been printing the 'TEST MODE' message, but nevertheless making
real changes.
There are two kinds of common options:
1. options common to all variants of a given command name
2. options common to all lvm commands
Previously, both kinds of common options were listed together
under "Common options". Now the first are printed under
"Common options for command" (when needed), and the second
are printed under "Common options for lvm" (always).
Remove the "usage notes" which should just
live in the man pages.
When there are 3 or more variants of a command,
print all the options produces a lot of output,
so require --longhelp to print all the options
in these cases.
For this syntax:
lvconvert --thinpool LV1 --poolmetadata LV2
lvconvert --cachepool LV1 --poolmetadata LV2
Restore the metadata swapping behavior in addition to
the pool creation behavior. When LV1 is already a pool,
the metadata LV will be swapped with LV2.
When LV1 is not a pool, it will be converted to a
pool using the specified LV for metadata.
This syntax is no longer advertised because of the
ambiguous behavior. The primary syntaxes for pool
creation and metadata swapping will be the advertised
methods.
When parsing command defs, track and report all
errors that are found. Add an error return case
from define_commands so the standard error exit
path is used.
When using liblvm2cmd, a process can do multiple
init/exit calls, i.e.
lvm2_init(); lvm2_run(); lvm2_exit();
lvm2_init(); lvm2_run(); lvm2_exit();
...
define_commands() needs to set up the global commands[]
definitions only the first time.
This reverts commit 717363bb94.
These alternate forms for swapping metadata cannot be
distinguished from the command for creating a pool.
If we were to add these alternate forms for swapping
metadata, we would need to overload the pool creation
command defs, making those definitions ambiguous.
Change run time access to the command_name struct
cmd->cname instead of indirectly through
cmd->command->cname. This removes the two run time
fields from struct command.
All lvconvert functionality has been moved out of the
previous monolithic lvconvert code, except conversions
related to raid/mirror/striped/linear. This switches
that remaining code to be based on command defs, and
standard process_each_lv arg processing. This final
switch results in quite a bit of dead code that is
also removed.
This is a new explicit version of 'lvconvert LV'
which has been an obscure way of triggering polling
to be restarted on an LV that was previously converted.
Lift all the snapshot utilities (merge, split, combine)
out of the monolithic lvconvert implementation, using
the command definitions. The old code associated with
these commands is now unused and will be removed separately.
This lifts the lvconvert --repair and --replace commands
out of the monolithic lvconvert implementation. The
previous calls into repair/replace can no longer be
reached and will be removed in a separate commit.
