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Rename original lv_error_when_full field to lv_when_full and also
convert it from binary field to string field displaying three
possible values: "error", "queueu" or "" (blank for undefined).
$ lvs vg/pool vg/pool1 vg/linear_lv -o+lv_when_full
LV VG Attr LSize Data% Meta% WhenFull
linear_lv vg -wi-a----- 4.00m
pool vg twi-aotz-- 4.00m 0.00 0.98 queue
pool1 vg twi-a-tz-- 4.00m 0.00 0.88 error
For -S|--select these synonyms are recognized:
"error" -> "error when full", "error if no space"
"queue" -> "queue when full", "queue if no space"
"" -> "undefined"
Support error_if_no_space feature for thin pools.
Report more info about thinpool status:
(out_of_data (D), metadata_read_only (M), failed (F) also as health
attribute.)
Use helper macros to handle reserved values and also define "undefined"
reserved value as:
FIELD_RESERVED_VALUE(cache_policy, cache_policy_undef, "", "", "undefined")
Which means:
- print "" if the cache_policy value is undefined (the first name for this reserved value is "")
- recognize "undefined" reserved name as synonym to ""
(so statements like "lvs -S cache_policy=undefined" are still recognized)
Avoid making a copy of the keyword which is already registered in
values.h for "unmanaged" (vg_mda_copies field) and "auto" reserved
value (lv_read_ahead field). Also use helper macros to handle these
reserved - this is the correct approach - just do not copy the same
thing again and do not mix it! The GET_FIELD_RESERVED_VALUE and
GET_FIRST_RESERVED_NAME macros guarantees this - use it!
In addition to that, rename reserved values:
vg_mda_copies --> vg_mda_copies_unmanaged
lv_read_ahead --> lv_read_ahead_auto
So the field reserved values follows this scheme:
"<field_name>_<reserved_value_name>".
The same applies for type reserved values with this scheme:
"<report type name in lowercase>_<reserved_value_name>"
Add a comment about this scheme for others to follow as well
when adding new fields and their reserved values. This makes
it a bit easier to read the code then.
RESERVED(id) --> GET_TYPE_RESERVED_VALUE(id)
FIRST_NAME(id) --> GET_FIRST_RESERVED_NAME(id)
Also add GET_FIELD_RESERVED_VALUE(id) macro to get per-field reserved value.
This makes it much more readable and hopefully it'll make it
easier to use these helper macros when adding new reporting
fields with reserved values if needed.
There was a bug in value and their synonym definition for these two fields
causing selections on these fields to not work correctly - nothing matched
against vg/lv_permissions fields even if selection criteria should have
matched.
Scenario:
$ lvs -o name,lv_permissions vg
LV LPerms
lvol0 read-only
lvol1 writeable
Before this patch:
$ lvs -o name,lv_permissions vg -S 'permissions=read-only'
(blank)
$ lvs -o name,lv_permissions vg -S 'permissions=writeable
(blank)
With this patch applied:
$ lvs -o name,lv_permissions vg -S 'permissions=read-only'
LV LPerms
lvol0 read-only
$ lvs -o name,lv_permissions vg -S 'permissions=writeable'
LV LPerms
lvol1 writeable
Also synonyms match correctly now:
$ lvs -o name,lv_permissions vg -S 'permissions=rw'
LV LPerms
lvol1 writeable
Like other binary fields we already have:
$ lvs -o name,zero vg/lvx vg/pool vg/pool1
LV Zero
lvx unknown
pool
pool1 zero
$ lvs -o name,zero vg/lvx vg/pool vg/pool1 --binary
LV Zero
lvx -1
pool 0
pool1 1
