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When raid leg is extracted, now the preload code handles this state
correctly and put proper new table entry into dm tree,
so the activation of extracted leg and removed metadata works
after commit.
When raid is being splitted, extracted leg & metadata
is still floating in the table - and thus we need to
detect this case and properly preload their matching
table so consequent activation of extracted LVs properly
renames (and FREES) existing raid images, so ongoing
image name shifting will work.
For example, with dmeventd/executable set to "" which is not allowed for
this setting, the config validation now ends up with:
$ lvm dumpconfig --validate
Configuration setting "dmeventd/executable" invalid. It cannot be set to an empty value.
LVM configuration invalid.
This check for empty values for string config settings was not
done before (we only checked empty arrays, but not scalar strings).
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"
The arg check using pvs is unnecessary. If the arg is not a PV,
the command will just fail later. Using the pvs command at this
point in the command is a problem when lvmetad is running, because
the pvs command does not report duplicate PVs when using lvmetad.
(Alternatively, use_lvmetad could be disabled by adding a --config
override to this pvs command.)
Add separate LVSINFOSTATUS field type for fields which display both
dm info-like and dm status-like information.
The internal interface is there with the introduction of LVSSTATUS
field type which can cope with the combination of LVSSTATUS
and LVSINFO field types (several fields).
However, till now, we considered that *single* field can display
either LVSINFO or LVSSTATUS, but not both at the same time.
Till now, we haven't had single field which needs both - hence
add LVSINFOSTATUS field type for such fields as we currently
need this for the lv_attr field which requires combination of
info and status.
This patch just adds interface for an ability to register such fields
(the code that copes with this is already in).
Recently the single 'status' code has been used for number of cache
features.
Extend the API a little bit to allow usage also for lv_attr_dup.
As the function itself is used in lvm2api - add a new function:
lv_attr_dup_with_info_and_seg_status() that is able to use
grabbed info & status information.
report_init() is now using directly passed lvdm struct pointer
which holds the infomation whether lv_info() was correctly obtained or
there was some error when trying to read it.
Move 'healt' attribute to status.
TODO convert raid function to use the already known status.
The previous patch felt short WRT disabling allocation on PVs holding other
legs of the RAID LV persistently; this patch introduces an internal,
transient PV flag PV_ALLOCATION_PROHIBITED to address this very problem.
General problem description for completeness:
An 'lvconvert --repair $RAID_LV" to replace a failed leg of a multi-segment
RAID10/4/5/6 logical volume can lead to allocation of (parts of) the replacement
image component pair on the physical volume of another image component
(e.g. image 0 allocated on the same PV as image 1 silently impeding resilience).
Patch fixes this severe resilince issue by prohibiting allocation on PVs
already holding other legs of the RAID set. It allows to allocate free space
on any operational PV already holding parts of the image component pair.
A full search for duplicate PVs in the case of pvs -a
is only necessary when duplicates have previously been
detected in lvmcache. Use a global variable from lvmcache
to indicate that duplicate PVs exist, so we can skip the
search for duplicates when none exist.
Previously, 'pvs -a' displayed the VG name for only the device
associated with the cached PV (pv->dev), and other duplicate
devices would have a blank VG name. This commit displays the
VG name for each of the duplicate devices. The cost of doing
this is not small: for each PV processed, the list of all
devices must be searched for duplicates.
When multiple duplicate devices are specified on the
command line, the PV is processed once for each of them,
but pv->dev is the device used each time.
This overrides the PV device to reflect the duplicate
device that was specified on the command line. This is
done by hacking the lvmcache to replace pv->dev with the
device of the duplicate being processed. (It would be
preferable to override pv->dev without munging the content
of the cache, and without sprinkling special cases throughout
the code.)
This override only applies when multiple duplicate devices are
specified on the command line. When only a single duplicate
device of pv->dev is specified, the priority is to display the
cached pv->dev, so pv->dev is not overridden by the named
duplicate device.
In the examples below, loop3 is the cached device referenced
by pv->dev, and is given priority for processing. Only after
loop3 is processed/displayed, will other duplicate devices
loop0/loop1 appear (when requested on the command line.)
With two duplicate devices, loop0 and loop3:
# pvs
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop0
PV VG Fmt Attr PSize PFree
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m
# pvs /dev/loop3
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop0
PV VG Fmt Attr PSize PFree
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m
# pvs /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop0
PV VG Fmt Attr PSize PFree
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m
# pvs -o+dev_size /dev/loop0 /dev/loop3
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop0
PV VG Fmt Attr PSize PFree DevSize
/dev/loop0 loopa lvm2 a-- 12.00m 12.00m 16.00m
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
With three duplicate devices, loop0, loop1, loop3:
# pvs -o+dev_size
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop3
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop1
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop3 /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop0 loopa lvm2 a-- 12.00m 12.00m 16.00m
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop3 /dev/loop1
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop1 loopa lvm2 a-- 12.00m 12.00m 32.00m
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop0 /dev/loop1
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop1 loopa lvm2 a-- 12.00m 12.00m 32.00m
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
# pvs -o+dev_size /dev/loop0 /dev/loop1 /dev/loop3
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop1 not /dev/loop0
Found duplicate PV XhLbpVo0hmuwrMQLjfxuAvPFUFZqD4vr: using /dev/loop3 not /dev/loop1
PV VG Fmt Attr PSize PFree DevSize
/dev/loop0 loopa lvm2 a-- 12.00m 12.00m 16.00m
/dev/loop1 loopa lvm2 a-- 12.00m 12.00m 32.00m
/dev/loop3 loopa lvm2 a-- 12.00m 12.00m 32.00m
Processes a PV once for each time a device with its PV ID
exists on the command line.
This fixes a regression in the case where:
. devices /dev/sdA and /dev/sdB where clones (same PV ID)
. the cached VG references /dev/sdA
. before the regression, the command: pvs /dev/sdB
would display the cached device clone /dev/sdA
. after the regression, pvs /dev/sdB would display nothing,
causing vgimportclone /dev/sdB to fail.
. with this fix, pvs /dev/sdB displays /dev/sdA
Also, pvs /dev/sdA /dev/sdB will report two lines, one for each
device on the command line, but /dev/sdA is displayed for each.
This only works without lvmetad.
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.)
API for seg reporting is breaking internal lvm coding - it cannot
use vgmem mem pool for allocation of reported value.
So use separate pool instead of 'vgmem' for non vg related allocations
Add consts for many function params - but still many other are left
for now as non-const - needs deeper level of change even on libdm side.
An 'lvconvert --repair $RAID_LV" to replace a failed leg of a multi-segment
RAID10/4/5/6 logical volume can lead to allocation of (parts of) the replacement
image component pair on the physical volume of another image component
(e.g. image 0 allocated on the same PV as image 1 silently impeding resilience).
Patch fixes this severe resilince issue by prohibiting allocation on PVs
already holding other legs of the RAID set. It allows to allocate free space
on any operational PV already holding parts of the image component pair.
