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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.
seg->extents_copied has to be defined properly on reducing
the size of a raid LV or conversion from raid5 with 1 stripe
to raid1 will fail.
Related: rhbz834579
Related: rhbz1191935
Related: rhbz1191978
Reshaping a raid5 LV to one stripe aiming to convert it to
raid1 (and optionally to linear) reports the wrong LV size
when still having reshape space allocated.
The lv_extend/_lv_reduce API doesn't cope with resizing RaidLVs
with allocated reshape space and ongoing conversions. Prohibit
resizing during conversions and remove the reshape space before
processing resize. Add missing seg->data_copies initialisation.
Fix typo/comment.
For the time being raid10 is limited to even number of total stripes
as is and 2 data copies. The number of stripes provided on creation
of a raid10(_near) LV with -i/--stripes gets doubled to define
that even total number of stripes (i.e. images).
Apply the same on disk adding conversions (reshapes) with
"lvconvert --stripes RaidLV" (e.g. 2 stripes = 4 images
total converted to 3 stripes = 6 images total).
Related: rhbz834579
Related: rhbz1191935
Related: rhbz1191978
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.
Enhance the raid report functions for the recently added LV fields
reshape_len, reshape_len_le, data_offset, new_data_offset, data_copies,
data_stripes and parity_chunks to cope with "lvs --select".
Related: rhbz834579
Related: rhbz1191935
Related: rhbz1191978
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).
Now that we got the "data_stripes" field key, adjust the "stripes" field description.
Enhance the "regionsize" field description to cover raids as well.
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.
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.
