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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.
Part of the UNIT description was still living in the
--size description. Move it to the Size[UNIT] description
since it is used by other options, not just --size.
In lvcreate/lvconvert, --poolmetdatasize can only be an
absolute value, but in lvresize/lvextend, --poolmetadatasize
can be given a + relative value.
The val types only currently support relative values that
go in both directions +|-. Further work is needed to add
val types that can be relative in only one direction, and
switching various option values to one those depending on
the command name. Then poolmetdatasize will not appear
with a +|- option in lvcreate/lvconvert, and will
appear with only the + option in lvresize/lvextend.
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.
A special case is needed to display
--extents for lvcreate since the cmd defs
treat --extents as an automatic alternative
to --size (to avoid duplicating every cmd def).
When a cmd def includes multiple sets of options (OO_FOO),
allow multiple OO_FOO sets to contain the same option and
avoid repeating it in the cmd def.
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.
The options list was sorted as:
- options with both long and short forms, alphabetically
- options with only long form, alphabetically
This was done only for the visual effect. Change to
sort alphabetically by long opt, without regard to
short forms.
(Change to recent commit 3f4ecaf8c2.)
Use --foo Number[k|UNIT] to indicate that
the default units of the number is k, but other
units listed below are also accepted.
Previously, underlined/italic Unit was used,
like other of variables, but this UNIT is more
like a shortcut than an actual variable.
We use --foo Number[k|Units] to indicate that
the default units of the number is k, but other
units listed below are also accepted.
Capitalize and underline Units so it is consistent
with other variables, and reference it at the end.
Technically, the k should be bold, but this
tends to make the text visually hard to read
because of the excessive highlights scattered
everywhere. So it's left normal text for now
(it's unlikely to confuse anyone.)
Print ... after a repeatable option in the OPTIONS section.
An alternative would be to just mention in the text description
that the option is repeatable.
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.
As we now user binary search - it's nondeterministict
which of the same 'args' will be give - so duplicates
need 'extra' care.
So provide same hack for output for --uuidstr_ARG as
for input.
Solves 'pvscan -u'.
Since there is a lot of options and lot of searches,
use binary search to keep strcmp at minimum.
The interesting part is - alphabetically sorted array contains
duplicates and some of them are not the 'right anwer', so
after we find matching string but not matching long_ARG,
we may need to check if the surrouding strings are the right matching
one.
The single loops is used also for strictly define --foo_long
(i.e. --stripes) and just differs at final part.
TODO1: replace strstr call with some flag (just like short_opt).
TODO2: drop '--' from being stored and tests by strcmp.
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.
