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Commit Graph

4047 Commits

Author SHA1 Message Date
Zdenek Kabelac
36003df7e3 cache: extend usability of cache_set_params
Fix missing reset of '*settings' pointer when no args were given.

Handle cache_chunk settings like all other settings, so it is properly
updated only with non-zero settings and the existing cache-pool
chunk_size is not being reconfigured.
2017-03-10 19:33:00 +01:00
Zdenek Kabelac
dcf038c7a6 cache: improve support for profile for cache settings
User can specify metadata profile which stores important cache
geometry data for easy configuration.

Fix missing support for getting chunk_size, cache_mode, cache_policy
for a cache/cache pools volumes from configuration or metadata profile.
2017-03-10 19:33:00 +01:00
Alasdair G Kergon
c41e999488 git: Upstream repository moved to sourceware.org
The fedorahosted git repository shuts down tomorrow:
  https://communityblog.fedoraproject.org/fedorahosted-sunset-2017-02-28/

Our upstream git repository has moved back to sourceware.org.
Mailing list hosting is not changing.

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  http://sourceware.org/git/lvm2.git

Example command to change the origin of a repository clone:
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2017-02-27 14:05:50 +00:00
Heinz Mauelshagen
d768fbe010 WHATS_NEW: add entry 2017-02-24 05:24:59 +01:00
Heinz Mauelshagen
8ab0725077 lvchange: reject writemostly/writebehind on raid1 during resync
The MD kernel raid1 personality does no use any writemostly leg as the primary.

In case a previous linear LV holding data gets upconverted to
raid1 it becomes the primary leg of the new raid1 LV and a full
resynchronization is started to update the new legs.

No writemostly and/or writebehind setting may be allowed during
this initial, full synchronization period of this new raid1 LV
(using the lvchange(8) command), because that would change the
primary (i.e the previous linear LV) thus causing data loss.

lvchange has a bug not preventing this scenario.

Fix rejects setting writemostly and/or writebehind on resychronizing raid1 LVs.

Once we have status in the lvm2 metadata about the linear -> raid upconversion,
we may relax this constraint for other types of resynchronization
(e.g. for user requested "lvchange --resync ").

New lvchange-raid1-writemostly.sh test is added to the test suite.

Resolves: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=855895
2017-02-23 15:09:29 +01:00
Zdenek Kabelac
9712995edd snapshot: improve removal of active origin volume
Previously when lvremove tried to remove 'active' origin,
it had been asking for every 'snapshot' LV separately
and doing individual single snapshot removals first.

To be faster it now deactivates origin before removal
all connected snapshots.

This avoids multiple reloads of dm table for origin volume
which were unnecessary as origin was meant to be removed as well.
2017-02-22 15:35:04 +01:00
Zdenek Kabelac
6716f5a2f4 WHATS_NEW: add entry 2017-02-22 15:20:52 +01:00
David Teigland
5ab051df7a WHATS_NEW: changes for recent command defs 2017-02-13 15:36:17 -06:00
David Teigland
c816e8b636 WHATS_NEW: items from command definitions patch set 2017-02-13 15:22:26 -06:00
Zdenek Kabelac
2a9eda1229 mem: add extra mem pages for pthread stack
Some archs can use even 64K pages and then lvm2 runs into trouble if
the stack is 'too small' to fit extra page capturing stack overwrite.

So when lvm2 limits stack - add extra mem page - be it 4K or 64K.

Relates to ppc64le bug: https://bugzilla.redhat.com/1387279
2017-02-11 18:23:15 +01:00
Heinz Mauelshagen
baba3f8e2a lvconvert: add conversion from/to raid10
Add:
- conversion support from striped/raid0/raid0_meta to/from raid10;
  raid10 goes by the near format (same as used in creation of
  raid10 LVs), which groups data copies together with their original
  blocks (e.g. 3-way striped, 2 data copies resulting in 112233 in the
  first stripe followed by 445566 in the second etc.) and is limited
  to even numbers of legs for now
- related tests to lvconvert-raid-takeover.sh
- typo

Related: rhbz1366296
2017-02-10 19:13:02 +01:00
Heinz Mauelshagen
55eaabd118 lvreduce/lvresize: add ability to reduce the size of a RaidLV
- support shrinking of raid0/1/4/5/6/10 LVs
- enhance lvresize-raid.sh tests: add raid0* and raid10
- fix have_raid4 in aux.sh to allow lv_resize-raid.sh
  and other scripts to test raid4

Resolves: rhbz1394048
2017-02-09 22:42:03 +01:00
Heinz Mauelshagen
cfb6ef654d lvconvert: add support to change RAID region size
Add:
- support to change region size of existing RaidLVs
  (all RAID LV types but raid0/raid0_meta)
- lvconvert-raid-regionsize.sh with test variations
  for different RAID types and region sizes

Resolves: rhbz1392947
2017-02-07 01:01:19 +01:00
Zdenek Kabelac
dae4f53acb clvmd: add mutex protection for cpg_ call
The library for corosync multicasting is not supporting multithread
usage - add local mutex to avoid parallel call of cpg_mcast_joined().
2017-02-05 17:55:37 +01:00
Heinz Mauelshagen
a4bbaa3b89 lvconvert: add segtypes raid6_{ls,rs,la,ra}_6 and conversions to/from it
Add:
- support for segment types raid6_{ls,rs,la,ra}_6
  (striped raid with dedicated last Q-Syndrome SubLVs)
- conversion support from raid5_{ls,rs,la,ra} to/from raid6_{ls,rs,la,ra}_6
- setting convenient segtypes on conversions from/to raid4/5/6
- related tests to lvconvert-raid-takeover.sh factoring
  out _lvcreate,_lvconvert funxtions

Related: rhbz1366296
2017-02-05 00:56:27 +01:00
Heinz Mauelshagen
d8568552e4 WHATS_NEW: New segment type raid6_n_6 2017-02-04 14:09:26 +01:00
Heinz Mauelshagen
96f331fe05 WHATS_NEW: New segment type raid5_n 2017-02-03 23:41:48 +01:00
Zdenek Kabelac
d80f9a107f lvmcmd2lib: support new command
Internal command which reads lvm.conf settins and passes it
via envvar to dmeventd monitoring thread.
2017-01-20 23:55:07 +01:00
Zdenek Kabelac
04a9cad499 config: new option dmeventd/thin_command
This setting will allowing configuring which command gets executed
when thin-pool fullness goes from 50%..100%
2017-01-20 23:53:26 +01:00
Zdenek Kabelac
f8234d6e5f libdm: add human R|readable units
When showing sizes with 'H|human' units we do use standard rounding.
This however is confusing users from time to time,
when the printed number uses some biger units i.e. GiB and there is just
tiny fraction of space missing.

So here is some real-life example with new 'r' unit.

$lvs

  LV    VG Attr       LSize  Pool Origin
  lvol0 vg -wi-a-----  1.99g
  lvol1 vg -wi-a----- <2.00g
  lvol2 vg -wi-a----- <2.01g

Meaning is - lvol1 has 'slightly' less then 2.00g - from sign '<' user
can be aware the LV doesn't have full 2.00GiB in size so he
will be less surpriced allocation of 2G volume will not succeed.

$ vgs
  VG #PV #LV #SN Attr   VSize  VFree
  vg   2   2   0 wz--n- <6,00g <2,01g

For uses needing  'old'  undecorated human unit simply will continue
to use 'H|h' units.

The new R|r  may further change when we would recongnize some
other way how to improve readability.
2017-01-20 23:52:17 +01:00
Peter Rajnoha
d90320f4f1 blkdeactivate: also unmount mount point on top of MD device if using blkdeactivate -u
The blkdeactivate script processes MD devices too so we should unmount
any mount point on top of an MD device if blkdeactivate -u|--umount is
called.

Diagnosed and reported by: Rick Warner <rick@microway.com>
See also https://bugzilla.redhat.com/show_bug.cgi?id=1410585.
2017-01-06 11:16:07 +01:00
Zdenek Kabelac
3e9c03cbbc cache: resize is still unsupported
During rework of resize code this validation check
has been lost (in my resize branch). Upstream
is still not supporting resize of any cache type LV
so needs to be prevented.
2017-01-05 15:34:22 +01:00
Zdenek Kabelac
95d5877f7a cache: add missing udev wait
When we need to clear dirty cache content of cached LV, there
is table reload which usually is shortly followed by next metadata
change.  However  udev  can't (as of now)  process   udev event
while device is 'suspended'.

So whenever sequence of  'suspend/resume/suspend' is needed,
we need to wait first for finishing of 'resume' processing before
starting next 'suspend'. Otherwise there is  'race' danger of triggering
unwantend umount by systemd as  such event will trigger
SYSTEMD_READY=0 state for a moment for such changed device.

Such race is pretty ugly to trace so we may need to review more
sequencies for missing 'sync'.

(Other option is to enhnace 'udev' rules processing to avoid
such dramatic actions to be happening for suspended devices).
2017-01-03 14:55:16 +01:00
Zdenek Kabelac
4fd41cf67f vgchange: max_pv limited to uint32
Solves: https://bugzilla.redhat.com/1280496

The only reasonable behaviour here is to error on
any number out of accepted range (i.e. now numbers
wrapping around with some hidden logic).

As this is plain bug there is no support for
backward compatibility since noone should
set numbers >UINT32_MAX and expect 0 or error
depending on how big number was used....

TODO: more fields might need to be converted.
2017-01-03 14:55:16 +01:00
Zdenek Kabelac
77997c7673 report: show proper info for merging origin
When there is 'merging' of an origin in progress, but metadata stil
do provide both origin and snapshot, we should show data from merged
snapshot.  This is important mainly for thin case, where there was
a window, where i.e. 'lvs -o+device_id' would report information
about 'already gone' origin thin LV.

This race window is usually hard to trigger but can be ocasionally hit.
Usually shortly after activation, but before polling process manages
to update metadata after merge.
2016-12-22 23:37:07 +01:00
Zdenek Kabelac
2aee4769b4 snapshot: validate merge has started
Before starting polling process, validate the merge has actually started
so there is not pointless invoke of lvmpolld.

This also fixes reported message from command, so user has
correct info whether merging has already started or
if it's delayed for next activation.
2016-12-22 23:37:07 +01:00
Zdenek Kabelac
95e3dd5fb1 lv: more exact check for merging origin
Merging origin has 'MERGE_LV' and should also have its merging snapshot.
2016-12-22 23:37:07 +01:00
Zdenek Kabelac
9491ab41cd validation: rework segment validation
Move individual segment validation to a separate function
executed for 'complete_vg'.

Move some 'extra' validation bits from 'raid' validation to global
segtype validation (so extending existing normal validation)

TODO: still some test are left to be moved.
Reduce some duplication in validation process - there are still
some left thought so still room for improving overal speed.
2016-12-22 23:37:07 +01:00
Zdenek Kabelac
0c56eb8f43 cache: support cached origin for snapshot
Enable  'lvcreate/lvconvert -s' for cached LV.
and supported operations:

Create a snapshot of cached LV

Split/Join snapshot LV to cached origin LV.
2016-12-19 14:41:42 +01:00
Zdenek Kabelac
eb3f83357a lvconvert: fix shown lv name for snapshot split
We can't keep 'display_lvname' for too long - it's using
ringbuffer and keeps limited number of names. So it's
safe only per few simple tests,  but can't be used anymore
after some function calls..
(Fixes 00e641ef37)
2016-12-19 14:41:16 +01:00
Zdenek Kabelac
75f2388093 backup: show warning once per command
When command calls backup() more then once (which is actually not
wanted) this warning message is shown repeatedly:

"WARNING: This metadata update is NOT backed up."

Instead now print message just once and less confuse user.
2016-12-18 19:38:30 +01:00
Zdenek Kabelac
5bb6266046 lvconvert: support cache to external origin conversion
Add this functionality to lvconvert:

'lvconvert --thin cachedLV --thinpool vg/poll'

Converts cachedLV to external origin (which will be read-only).
New thin volume is created in thinpool LV and it's using external
origin as source for unprovisioned chunks.
This conversion happens  online (while volume is in use).
Thin LV remains fully writable.
Cached external origin no longer could be written so cache will be used
ONLY for read operations. For this limitation we require cache mode
to be writethrough (as writeback cannot write to read-only volumes).

When  thinLV is later removed  cached external origin is again
fully usable, just note, LV remain in 'read-only' mode.
When read-write is needed,  'lvchange -prw' has to be used.

Single external origin could be user by multiple thinLV in
multiple differen thin pool.
2016-12-18 19:35:27 +01:00
Zdenek Kabelac
69434c2eca cache: improve activation with -real
When cache volume may be converted from normal to -real layer LV
we need to improve logic for call cache_check.

With this patch, we register call for cache_check only when metadata LV
is not yet present in active table slot (should match initial table
load).
This avoids unwanted checking when cache would become layer device
online.
2016-12-18 19:30:50 +01:00
Zdenek Kabelac
29b0e42be3 lv: fix lock holder for external origin
External origin could be reloaded via more locks.
It's actually even more complex then thin-pool,
as it may be active on more nodes for linear LVs
(and maybe even more types).

External origin is always read-only thus unmodifiable
device so there should not be a problem accesing it
through multiple nodes.

Also for thin-pool check first presence of active thin-pool.

FIXME:
It's not easy to detect on which nodes this device is active
Thus manipulation with such device may require checking every
node and it active state and refresh.

But since such setup is quite complex to prepare and use,
hopefully there are not user trying to 'explore' this usage yet.
2016-12-18 19:25:25 +01:00
Zdenek Kabelac
a24eae6e82 cache: prepare status checking for layer
To be ready to show status of cache volume, call the status
with layer.  Layer is automatically detected in this case when
cache volume is used in 'layered' form (needs -real suffix).
2016-12-18 19:23:13 +01:00
Zdenek Kabelac
bf157ed833 cache: improve wait for cache clear
Avoid printing misleading message about single dirty block.
Instead properly detect condition where the 'cleaner' policy
needs to be installed without 'overloading' dirty variable.

Also print warning if we would be clearing read-only volume.
(it really shouldn't happen).
2016-12-18 19:22:11 +01:00
Zdenek Kabelac
36f609e513 validation: check external property is matching
Detect if number of external_count is matching
referencing devices for  external_origin LV.
2016-12-18 19:17:59 +01:00
Zdenek Kabelac
7db46c4a39 thin: reload external origin with last thin
External origin could be activated as stand-alone device.
When the last thin LV is removed, external origin is no longer
the external origin and it's layer property was dropped.

Ensure dm table is correct by reloading external origin
(when it's active).
2016-12-18 19:13:34 +01:00
Zdenek Kabelac
c71fefad8d lvs: show status for layer
When LV is external origin, show info for LV but
status for -layer.  So we expose more info to a user
as otherwise active external origin is only linear
mapping of -real layer.

We do the same for i.e. old snaphost origin.
2016-12-18 19:12:12 +01:00
Zdenek Kabelac
bdfc96cb08 raid: fix activation of tracked image
Activation of raid has brough up also splitted image with tracing
(without taking lock for this).

So when raid is now activate - such image is not put into
table (with _rmeta).  When user needs such device, just active it.
2016-12-18 19:10:38 +01:00
Zdenek Kabelac
fecd043cca raid: split preserves local exlusive activation 2016-12-14 11:40:01 +01:00
Zdenek Kabelac
d0fe3ec0c5 raid: avoid manipulation of segment status
RAID is LV property

TODO: only 2 flags are seg->status: PVMOVE & MERGING
At least the second one should be soon elimanted as again
we merge LV not a segment.
2016-12-13 22:07:52 +01:00
Zdenek Kabelac
d1e398c474 segtype: check for seg type instead of status
RAID is LV property - which has single segment of raid type.
2016-12-13 22:07:52 +01:00
Zdenek Kabelac
0690392040 raid: improve table reload sequence
This is another place for 'common' use pattern or
reload and activation of deleted devices.
(Moving the exclusive activation to _deactivate_and_remove_lvs()).

TODO: looks like halve of raid function is reloading
just 'origin' - and the other full LV.
2016-12-13 22:07:52 +01:00
Zdenek Kabelac
3903f915f8 pvmove: fix activation order
For proper locking we need to gain lock first for mirror which
needs to be deactivated later to be working in cluster.
2016-12-11 23:22:36 +01:00
Zdenek Kabelac
67f9e6b175 raid: avoid _ at end of name of extracted metadata LV
Do not generate @PREFIX@vg/LV1_rmeta_1_extracted_.
2016-12-11 23:20:51 +01:00
Zdenek Kabelac
55ca8043d4 raid: optimize clearing of lvs
Activate whole list of metadata lvs first before clearing them.
(Similar to commit ada5733c56)

TODO: make this clearing in a single common function.
2016-12-11 23:19:41 +01:00
Zdenek Kabelac
8831a541a8 raid: fix delete on clustered vg
For clustered VG ensure lock is grabbed first,
so later deactivation works.

TODO: fix tree to solve device removal automatically.
2016-12-11 23:18:22 +01:00
Zdenek Kabelac
0c8369099b raid: fix raid1 to mirror conversion
Fix order of operation when converting raid1 into old mirror.
Before any later metadata modification are initiated prepare
mirror_log device with all clearing.
Then directly convert  raid1 into mirror with mirror_log.
This convertion now properly see as precommitted metadata
new 'mirror' and committed old 'raid' and is able to
preload all LVs.
2016-12-11 23:17:22 +01:00
Zdenek Kabelac
31564834db mirror: add prepare_mirror_log
Function prepares new mirror log LV in-sync optionaly.
This is useful to have such device ready when converting
raid1 to mirror.
2016-12-11 23:16:16 +01:00
David Teigland
c459f23565 lvmetad: fix segfault in daemon_reply_simple
missing NULL termination
2016-12-09 15:22:30 -06:00
Zdenek Kabelac
114f7e6285 dev_manager: use setup_task_run for mknod
Simplify info run for use only for INFO & STATUS.
Drop handling MKNODES within _info_run() call
and use more advanced _setup_task_run() directly.

This allows to further simplify _info_run().
2016-12-05 17:12:39 +01:00
Zdenek Kabelac
5163b8f697 dev_manager: extend setup_task
Integrate also query for inactive table and
handle dm_task_run() and dm_task_get_info()
(thus switching to setup_task_run)

Add one exception case for DM_DEVICE_TARGET_MSG.

This allows further shortening and simplification of all
other users of this function.
2016-12-05 17:11:49 +01:00
Zdenek Kabelac
e2c7e0ad11 activation: optimize away lv_has_target_type
It's actually not needed to call extra lv_has_target_type() to detect
snapshot merge is in progress - decode this right during status
capturing and save even few extra ioctl calls.
2016-12-05 17:10:14 +01:00
Zdenek Kabelac
6fd20be629 activation: lv_info_with_seg_status API change
Drop LV from passed API arg - it's always segment being checked.
Also use_layer is now in full control of lv_info_with_seg_status().
It decides which device needs to be checked to get 'the most info'.

TODO: future version should be able to expose status from
2016-12-05 17:09:47 +01:00
Zdenek Kabelac
ed93f0973a activation: lv_info_with_seg_status unify status selection
Start moving selection of status taken for a LV into a single place.
The logic for showing info & status has been spread over multiple
places and were doing too complex decision going agains each other.

Unify selection of status of origin & cow scanned device.

TODO: in future we want to grab status for LV and layered LV and have
both statuses present for display - i.e. when 'old snapshot'
of thinLV is takes and there is ongoing merge - at some moment
we are not capable to show all needed info.
2016-12-05 17:09:13 +01:00
Zdenek Kabelac
5ba2d58d28 activation: improve error handling for status reading
When lvm2 wants to see a status, it needs to validate,
segment for status reading is matching whan lvm2 expects in
metadata.

Also ensure status failure will not cause '0' from info reading
when actual info was collected properly.
Failure in 'status' reading is considered to be
a 'log_warn()' event only.
2016-12-05 17:05:17 +01:00
Zdenek Kabelac
4a4b22e114 activation: status check switch to warn
When we can't parse status, switch to warning as this is not
considered an errornous case.  LVS is not supposed to return
error status code when  device is not what it's been expected to
be - but it should be WARNING a user there is something unexpected.
2016-12-05 17:04:24 +01:00
Zdenek Kabelac
325c2c5687 lv: always check status type
Always validate status type has an expected value,
before accessing status struct members.
2016-12-05 17:03:38 +01:00
Zdenek Kabelac
6a450952ad striped: implement compatible target name
Linear is handled by striped target.
2016-12-05 17:02:01 +01:00
Zdenek Kabelac
254f73e3ef snapshot: reporting uses statusinfo
Convert lvs -o lv_merge_failed,lv_snapshot_invalid to use
lv_info_and_status function.

This makes it equal to attr value showing this info
(as they were different since they were derived from
different data set and different logic as well).

Also saves couple extra ioctl that were needed to obtain this info.
2016-12-05 17:01:15 +01:00
Alasdair G Kergon
bb5eb324e3 post-release 2016-11-30 23:21:11 +00:00
Alasdair G Kergon
57e24817b7 pre-release 2016-11-30 23:14:34 +00:00
Heinz Mauelshagen
745250073c raid: fix sync percent on large RaidLVs
Resolves: rhbz1400301
2016-12-01 00:00:02 +01:00
Tony Asleson
c0a508cfab WHATS_NEW: New argument --blackboxsize 2016-11-30 16:47:31 -06:00
Heinz Mauelshagen
5da10fda4c WHATS_NEW: Allow a transiently failed RaidLV to be refreshed 2016-11-30 23:17:21 +01:00
Zdenek Kabelac
8a4dfe6ce7 cleanup: use lv_update_and_reload
Avoid code duplication and use exiting commonly used
lv_update_and_reload() function.

There is still one place left where mirror is doing strange
double suspend call - needs there more thinking what's wrong with
that code.
2016-11-23 17:53:44 +01:00
Zdenek Kabelac
0ad95b77d0 mirror: preserve MIRRORED status for temporara image
When lvconvert adds a new leg - it's doing it free 'temporary' image
layer - however this temporary 'internal' mirror is also MIRRORED LV.
But the status bit was not properly transfered through layer.
2016-11-23 17:47:58 +01:00
Zdenek Kabelac
851095a6af raid: lvconvert uses transient check for raid
Also check if the raid status isn't teling us there is something wrong
with any raid image device.
2016-11-23 17:46:50 +01:00
Zdenek Kabelac
23809379ba raid: implement transient status check
Take into acount reported state from 'raid' targets.
When raid leg is marked with 'D' - take it as missing leg.
2016-11-23 17:45:44 +01:00
Peter Rajnoha
68d6d342f8 dbus: only log msg as debug if lvm2-lvmdbusd unit missing for D-Bus notification
Do not emit warning message but only log debug message if
lvm2-lvmdbusd.service unit is missing and at the same time
we have global/notify_dbus=1 (which is used by default if we
configured sources with "--enable-notify-dbus"). We don't want
hard dependency between LVM2 and lvmdbusd so it's enough to log
only debug message in this case.
2016-11-14 14:53:19 +01:00
Zdenek Kabelac
d8fc4d093e conf: support zero for missing_stripe_filler
Make it easier to replace missing segments with 'zero' returning
target - otherwise user would have to create some extra target
to provide zeros as /dev/zero can't be used (not a block device).

Also break code loop when segment is found and make it an INTERNAL_ERROR
where it's missing.
2016-11-11 16:58:16 +01:00
Zdenek Kabelac
59b29716e5 lvconvert: repair accepts interval and background
For mirror and raid we expose --interval and --background on
command line (instead of using just always using compiled-in defaults).
2016-11-11 16:51:33 +01:00
Zdenek Kabelac
ada5733c56 raid: faster rmeta clearing
Instead of clearing multiple rmeta device with sequential activation
process and waiting for udev for every _rmeta device separately,
activate all _rmeta devices first and then clear them and deactivate
afterwards.

Also update some tracing messages.

When anyhing goes wrong during clearing process, always try to
deactivate as much _rmeta devices as possible before fail.
2016-11-08 16:00:14 +01:00
Alasdair G Kergon
9e03fc3c2a post-release 2016-11-05 01:14:06 +00:00
Alasdair G Kergon
eed708dbd9 pre-release 2016-11-05 01:03:32 +00:00
Zdenek Kabelac
e3775173b4 cleanup: log_info to log_error
Switch to more appropriate logging level.
2016-11-03 17:49:07 +01:00
Peter Rajnoha
4585785613 blkdeactivate: deactivate dev stack if dev on top already unmounted
If blkdeactivate finds out that the device on top of device stack
is already unmounted, it still proceeds with device stack deactivation
underneath now.

This situation can happen if blkdeactivate is started and the mount
point is unmounted in parallel by chance (so when blkdeactivate
gets the the actual umount call, the device is not mounted anymore).
Before, the blkdeactivate added such device to skip list which caused
all the stack underneath to be skipped too on deactivation. Now, we
proceed just as if blkdeactivate did the umount itself.

For example, in the example below, the vg-lvol0 is mounted on /mnt/test
when blkdeactivate is called, but it gets unmounted in parallel later
on when blkdeactivate gets to the actual umount call.

Before this patch (vg-lvol0 underneath not deactivated):

  $ blkdeactivate -u
  Deactivating block devices:
    [UMOUNT]: unmounting vg-lvol0 (dm-2) mounted on /mnt/test... skipping

With this patch applied (vg-lvol0 underneath still deactivated):

  $ blkdeactivate -u
  Deactivating block devices:
    [UMOUNT]: unmounting vg-lvol0 (dm-2) mounted on /mnt/test... already unmounted
    [LVM]: deactivating Logical Volume vg/lvol0... done
2016-11-01 16:52:51 +01:00
Heinz Mauelshagen
8270ff5702 lvconvert: prevent non-synced raid1 primary leg repair
(Automatic) repair may not be allowed during the initial sync of an upconverted
linear LV, because the data on the failing, primary leg hasn't been completely
synchronized to the N-1 other legs of the raid1 LV (replacing failed legs during
repair involves discontinuing access to any replaced legs data, thus preventing
data recovery on the primary leg e.g. via dd_rescue).

Even though repair would not cause data loss when adding legs to a fully synced
raid1 LV, we don't have information yet defining this state yet (e.g. a raid1
LV flag telling the fully synchronized status before any legs were added),
hence can't automatically decide to allow to repair.

If nonetheless a repair on a non-synced raid1 LVs is intended, the "--force"
option has to be provided.

Resolves: rhbz1311765
2016-10-28 15:55:10 +02:00
Heinz Mauelshagen
ff05ed7afd lvchange/vgchange/lvconvert: prevent raid4 creation/activation/conversion on non-supporting raid targets
Check for dm-raid target version with non-standard raid4 mapping expecting the dedicated
parity device in the last rather than the first slot and prohibit to create, activate or
convert to such LVs from striped/raid0* or vice-versa in order to avoid data corruption.

Add related tests to lvconvert-raid-takeover.sh

Resolves: rhbz1388962
2016-10-27 11:42:07 +02:00
Heinz Mauelshagen
de78e8eae7 lvconvert: position dedicated parity device in raid4 conversions porperly
On conversions between striped/raid0* and raid4, the kernel expects
the dedicated raid4 parity SubLVs in the first segment area rather than
in the last it's been allocated to, thus the data mapping ain't proper.

Enhance lvconvert (lib/metadata/raid_manip.c) to shift the dedicated
parity SubLVs on conversions from striped/raid0* to raid4 and vice-versa.

In case of raid0_meta -> raid4 where the MD raid0 personality already has
stored RAID array device positions in the superblocks, the MetaLVs have to
be cleared so that the kernel doesn't fail validating the array positions
after lvm has shifted them up by one.

Add more tests to lvconvert-raid-takeover.sh including one to check for
mapping flaws by converting a created raid4 with filesystem -> striped
and fsck it.

Whilst on it:
- add missing direct striped -> raid4 conversion to the takeover array
  to avoid an intermim conversion from striped -> raid0*
- clean up the takeover array
- allow lvconvert to actually call lv_raid_convert() on all takeover requests
  in order to check parameters and display messages provided by takeover
  functions rather than just "...not supported" from within lvconvert
- fix a typo

Resolves: rhbz1386148
2016-10-21 19:00:31 +02:00
Zdenek Kabelac
1186cf2ad4 lvconvert: fix error value
Seems some error path where not converted to 'new' ECMD return value.
Fix them to always 'goto out'.
Also drop unneeded   'ret = 0' when ret already is 0.
2016-10-11 13:36:29 +02:00
Alasdair G Kergon
1bc546269a lvconvert: Disable thin pool raid conversion while active.
Works if the pool is inactive.

Activation code doesn't notice a new raid dependency in on-disk metadata
when a thin LV is already active.

https://bugzilla.redhat.com/1365286
2016-09-27 18:22:54 +01:00
Peter Rajnoha
0a480c5c52 systemd: disable service start rate limiting for lvm2-pvscan@.service
We shouldn't be losing pvscans just because of the fact that the
underlying device (PV) appears and disappears quickly in the system,
otherwise lvmetad may not see the device if it appears again (or it may
still keep the device in cache even it's already gone).
2016-09-27 10:48:01 +02:00
Alasdair G Kergon
397c246fe0 post-release 2016-09-26 14:29:35 +01:00
Alasdair G Kergon
5233a3468c pre-release 2016-09-26 14:20:08 +01:00
Peter Rajnoha
b5e093624d toolcontext: read all configuration sources when checking config values in lvm2-activation-generator through lighweight toolcontext handler
We added lightweight toolcontext handle to avoid useless initialization
of some parts of the context and also to avoid problems when using the
handle very soon at system boot, like in lvm2-activation-generator
through lvm2app interface. However, we missed reading all the other
config sources like lvmlocal.conf as well as any tag config - we need to
read these too to get the final config value which may be overriden in
any of these additional config sources.

Currently, we use this lightweight toolcontext handle to read
global/use_lvmetad and global/use_lvmpolld config values in
lvm2-activation-generator using lvm2app interface (lvm_config_find_bool
lvm2app function).
2016-09-23 14:57:44 +02:00
Heinz Mauelshagen
f2efd04052 tests: fix raid rebuild tests to work with older target versions
Pre 1.9 dm-raid targets status output was racy, which caused
the device status chars to be unreliable _during_ synchronization.
This shows paritcularly with tiny test devices used.

Enhance lvchange-rebuild-raid.sh to not check status
chars _during_ synchronization. Just check afterwards.
2016-09-22 23:35:37 +02:00
Peter Rajnoha
f1cad4c710 config: use config_tree_from_string_without_dup_node_check throughout code to construct metadata trees 2016-09-21 18:18:15 +02:00
Heinz Mauelshagen
5d455b28fc lvconvert: fix (automatic) raid repair regression
The dm-raid target now rejects device rebuild requests during ongoing
resynchronization thus causing 'lvconvert --repair ...' to fail with
a kernel error message. This regresses with respect to failing automatic
repair via the dmeventd RAID plugin in case raid_fault_policy="allocate"
is configured in lvm.conf as well.

Previously allowing such repair request required cancelling the
resynchronization of any still accessible DataLVs, hence reasoning
potential data loss.

Patch allows the resynchronization of still accessible DataLVs to
finish up by rejecting any 'lvconvert --repair ...'.

It enhances the dmeventd RAID plugin to be able to automatically repair
by postponing the repair after synchronization ended.

More tests are added to lvconvert-rebuild-raid.sh to cover single
and multiple DataLV failure cases for the different RAID levels.

- resolves: rhbz1371717
2016-09-21 00:39:29 +02:00
Zdenek Kabelac
67d4b3b7f2 cache: restore reported origin field
Commit 199697accf rerouted funtion
for priting cache volume origin to lvm2app app function - which
however had a bug.  So restore the original functionality
and print correct LV as cache origin LV.
2016-09-20 14:26:11 +02:00
Alasdair G Kergon
414d39085c snapshots: Fix monitoring to use cow not internal LV. 2016-09-20 02:30:58 +01:00
Zdenek Kabelac
0e8449a5b9 thin: fix lvchange of discards and zero flag
Reload of thin-pool origin_only is designed to only post messages
to a thin-pool. It's not intended to be used for reload of thin-pool
table. Fix it by using standard call  'lv_update_and_reload()'.
2016-09-19 14:00:56 +02:00
Zdenek Kabelac
c2c2721d00 thin: enforce there is some free space in thin pool metadata
Unconditionally guard there is at least 1/4 of metadata volume
free (<16Mib) or 4MiB - whichever value is smaller.

In case there is not enough free space do not let operation proceed and
recommend thin-pool metadata resize (in case user has not
enabled autoresize, manual 'lvextend --poolmetadatasize' is needed).
2016-09-19 14:00:56 +02:00
Zdenek Kabelac
776d5a25b4 thin: report pool as holder when no active thin volume
In the case there is no active thin volume, report thin pool
as lock holder. This fixed function like lvextend
which either expecte lock holder LV is some active thin
or 'possibly' inactive thin pool.
2016-09-19 14:00:56 +02:00
Alasdair G Kergon
9c8c8fb63a alloc: Use --alloc normal for mirror logs.
The existing code doesn't understand that mirror logs should cling to
parallel LVs (like extending them) instead of avoiding them.

As a quick workaround to avoid lvcreate failures, hard-code
--alloc normal for mirror logs even if the rest of the allocation
used a stricter policy.

https://bugzilla.redhat.com/show_bug.cgi?id=1376532
2016-09-16 02:11:58 +01:00
Alasdair G Kergon
5da35d879a lvmdump: Use O_DIRECT to gather metadata. 2016-09-15 14:00:39 +01:00
Zdenek Kabelac
b592ea5bbc activation: dso always defined for monitoring query
Ensure 'dso' has always a defined (NULL) value,
and also ensure NULL 'dso' is not dereferenced.
2016-09-12 16:49:49 +02:00
Peter Rajnoha
06c7220f78 man: add lvmreport man page 2016-09-12 14:11:39 +02:00
Alasdair G Kergon
1768ca599b man: Only install lvmraid when needed. 2016-09-12 13:03:09 +01:00
Zdenek Kabelac
454b891f6d cache: fix reporting of dirty cache
When cache has zero used blocks it's been wrongly reported as 100.00% dirty.
Fix it and report 0.00.
2016-09-09 20:53:36 +02:00
Zdenek Kabelac
9350aa7218 lvm2app: fix cache percantage reporting
In lvm2app we were always returning dirty (copy%) value.
Return properly data & metadata usage values.
2016-09-09 15:03:28 +02:00
Zdenek Kabelac
4b22cd81e6 cache: report metadata percentage
Reinstantiate reporting of metadata percent usage for cache volumes.
Also show the same percentage with hidden cache-pool LV.
This regression was caused by optimization for a single-ioctl in
2.02.155.
2016-09-09 15:01:35 +02:00
Brassow Jonathan
5838c41a35 cache: scrubbing for cache origin LV - Bug 1169495
Allow RAID scrubbing on cache origin sub-LV

This patch adds the ability to perform RAID scrubbing on the cache
origin sub-LV (https://bugzilla.redhat.com/1169495).  Cache origin
operations are restricted to non-clustered RAID LVs until there can
be further testing in a cluster (even for exclusive activation).

User can either specify directly _corig LV
or he can specify cache LV and operation  --syncation is
passed ONLY to   _corig LV.

If users wants to manipulation with cache-pool devices - he
needs to specify this object name.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
2016-09-07 16:42:32 +02:00
Alasdair G Kergon
01cc0dfae9 post-release 2016-09-07 02:34:15 +01:00
Alasdair G Kergon
3d2b1ff5c4 pre-release 2016-09-07 02:25:51 +01:00
Peter Rajnoha
5d323c37f3 refactor: move and rename _dev_is_mpath_component in lvmetad.c to udev_dev_is_mpath_component in dev-type.c 2016-09-05 12:55:25 +02:00
Peter Rajnoha
16ed726610 lvmdump: use lsblk -s and lsblk -O in lvmdump only if these options are supported
The lsblk is just a nice helper here - it's not crucial for lvmdump so
do best effort here and use the most we can from current version of
lsblk that is installed on system. The lsblk -s option was added a bit
later after lsblk introduction and lsblk -O support even more later -
so if these are not available, use only pure lsblk output without any
extras.
2016-08-30 15:38:34 +02:00
Alasdair G Kergon
be85c22f65 raid10: Fix #stripes in lvcreate msg when too many. 2016-08-30 12:04:23 +01:00
Zdenek Kabelac
81970d22d8 cache: do not monitor cache-pool
Avoid monitoring of activated cache-pool - where the only purpose ATM
is to clear metadata volume which is actually activate in place
of cache-pool name (using public LV name).

Since VG lock is held across whole clear operation, dmeventd cannot
be used anyway - however in case of appliction crash we may
leave unmonitored device.

In future we may provide better mechanism as the current name
replacemnet is creating 'uncommon' table setups in case the metadata
LV is more complex type like raid  (needs some futher thinking about
error path results).

Another point to think about is the fact we should not clear device
while holding lock (i.e. dmeventd mirror repair cannot work in cases
like this).
2016-08-29 20:51:15 +02:00
Zdenek Kabelac
b493811968 cache: introduce cache_pool_max_chunks
Introduce 'hard limit' for max number of cache chunks.
When cache target operates with too many chunks (>10e6).

When user is aware of related possible troubles he
may increase the limit in lvm.conf.

Also verbosely inform user about possible solution.

Code works for both lvcreate and lvconvert.

Lvconvert fully supports change of chunk_size when caching LV
(and validates for compatible settings).
2016-08-29 20:47:31 +02:00
Alasdair G Kergon
2fde4399a0 lvconvert: Fix --splitmirrors segfault with incorrect PV.
Commit 9ee071705b misunderstood integer
promotion, but it's simpler to detect -1 more directly.
2016-08-26 01:21:01 +01:00
Peter Rajnoha
e758d722c7 conf: fix typo in report/columns_as_rows config option name recognition
Commit e947c362dd introduced
config_settings.h file for central place to store all definitions for
config options. By mistake, it used report/colums_as_rows instead
of report/columns_as_rows (missing "n" in "columns").
2016-08-25 14:53:32 +02:00
Alasdair G Kergon
7ba7768111 alloc: Avoid PV tags too when avoiding parallel PV allocation.
Also add debug messages for parallel PVs.
2016-08-24 19:41:11 +01:00
Alasdair G Kergon
68adf2c199 alloc: Move _log_parallel_areas. 2016-08-24 15:47:38 +01:00
Alasdair G Kergon
7837fbc1c1 lvconvert: Disallow raid10 mirror conversions. 2016-08-23 23:40:16 +01:00
Alasdair G Kergon
952e413328 dmeventd: Fix unmonitoring when segtype changes.
When the segment type is being changed, unmonitoring an LV requires
the existing dso to be specified as a parameter, not the new one.
2016-08-23 02:26:14 +01:00
Alasdair G Kergon
7646741ec6 raid: Don't monitor raid0 or raid0_meta LVs. 2016-08-20 02:14:33 +01:00
Alasdair G Kergon
88e6abc5a0 lvconvert: Don't allow --repair on raid0 LVs. 2016-08-19 23:42:01 +01:00
Alasdair G Kergon
ea0f604e70 lvcreate: No longer adjust --stripes for raid types.
If the number of stripes requested is incompatible with the requested
type of raid, give an error instead of adjusting it.

If no stripes argument is supplied, continue to use an appropriate
default.
2016-08-19 14:19:51 +01:00
Alasdair G Kergon
c27963c566 lib: Move lcm and gcd to lib/misc for wider use. 2016-08-18 14:06:13 +01:00
Alasdair G Kergon
114db6f745 tools: Suppress some unnecessary --stripesize warnings.
https://bugzilla.redhat.com/1366745
2016-08-15 19:38:45 +01:00
Heinz Mauelshagen
8e9d5d12ae pvmove: prohibit non-resilient collocation of RAID SubLVs
'pvmove -n name pv1 pv2' allows to collocate multiple RAID SubLVs
on pv2 (e.g. results in collocated raidlv_rimage_0 and raidlv_rimage_1),
thus causing loss of resilence and/or performance of the RaidLV.

Fix this pvmove flaw leading to potential data loss in case of PV failure
by preventing any SubLVs from collocation on any PVs of the RaidLV.
Still allow to collocate any DataLVs of a RaidLV with their sibling MetaLVs
and vice-versa though (e.g. raidlv_rmeta_0 on pv1 may still be moved to pv2
already holding raidlv_rimage_0).

Because access to the top-level RaidLV name is needed,
promote local _top_level_lv_name() from raid_manip.c
to global top_level_lv_name().

- resolves rhbz1202497
2016-08-15 18:22:32 +02:00
Alasdair G Kergon
c7bd33d951 post-release 2016-08-15 13:23:06 +01:00
Alasdair G Kergon
8297276967 pre-release 2016-08-15 13:17:47 +01:00
Alasdair G Kergon
93b61c07eb raid: Avoid double suffix on rmeta LV name paired with rimage LV. 2016-08-11 23:31:49 +01:00
Alasdair G Kergon
480c1c9599 post-release 2016-08-10 03:01:55 +01:00
Alasdair G Kergon
37b8b84fee pre-release 2016-08-10 02:42:35 +01:00
Heinz Mauelshagen
6f90c954b7 WHATS_NEW: reject --nosync option for RAID6 LVs in lvcreate 2016-08-08 16:00:49 +02:00
Alasdair G Kergon
c55134aa48 lvconvert: Limit --corelog and --mirrorlog to mirrors.
It's an error to specify a log when the final result is not of type
mirror.
2016-08-08 14:39:55 +01:00
Peter Rajnoha
57fa5d4329 lvmcmdline: do not refresh whole cmd context if profile dropped after processing LVM cmd
We don't need to refresh whole cmd context if we drop profile after
processing LVM command - just like we don't refresh cmd context when
we're applying the profile. It's because profiles contain only safe
subset of settings which do not require complete cmd context refresh.

This patch calls process_profilable_config instead of
refresh_toolcontext if there was profile applied for the LVM
command only, not --config which requires toolcontext refresh.
The process_profilable_config just sets proper values based on
values of profilable settings, but it does not do complete
reinitialization of various parts (e.g. filters, logging etc.).
2016-08-08 11:57:13 +02:00
Alasdair G Kergon
76ef2d15d8 lvconvert: Support raid0<->raid4 and mirror<->raid1.
Only simple takeover cases so far.
2016-08-07 00:56:08 +01:00
Alasdair G Kergon
de7f1deb80 raid: Report supported lvconvert conversions if invalid. 2016-08-07 00:30:26 +01:00
Heinz Mauelshagen
802bd34562 WHATS_NEW: fixup order 2016-08-05 16:31:46 +02:00
Heinz Mauelshagen
9aefe9aa7a WHATS_NEW: add '--rebuild PV' option to lvchange to allow for PV selective rebuilds 2016-08-05 16:07:14 +02:00
Alasdair G Kergon
a234cebbed lvconvert: Preserve mirror region size with --repair. 2016-08-02 19:50:04 +01:00
Alasdair G Kergon
804a397643 lvconvert: Forbid stripe parameters with --repair. 2016-08-02 15:59:12 +01:00
Alasdair G Kergon
4ffe15bf6a tools: Unify stripesize parameter validation.
Move it all into get_stripe_params().
Some code paths missed --stripesize checks.
E.g. lvcreate --type raid4 -i1
2016-07-30 02:05:50 +01:00
Alasdair G Kergon
d01b1b6cc1 lvconvert: Rearrange code that decides segtype. 2016-07-30 00:22:13 +01:00
Alasdair G Kergon
6b6e258e0c post-release 2016-07-28 19:58:22 +01:00
Alasdair G Kergon
6f47e79a88 pre-release 2016-07-28 18:36:45 +01:00
Zdenek Kabelac
eaf7d06a82 lvconvert: support --zero for full cache pool conversion.
Add matching support for -Z option also we doing full conversion
to cache-pool.

Extending coversion message to show which pool type is created
and whether the metadata will be wiped or remain unmodified.
2016-07-27 16:20:57 +02:00
Zdenek Kabelac
3c377f8334 lvconvert: tune cache-pool zeroing
Follow-up to 27a767d5e8.
Tunning behavior in a way we always prompt when option --zero is NOT specified.
Without -Z lvm expects user wants to 'reset' cache-pool metadata
(they could have been splitted from some cached LV)

If user doesn't want to zero metadata he needs to specify -Zn.

User may also avoid prompting for zeroing by using -Zy for
cache-pool (basically equals using --yes  without -Z being given)
(unlike full convert case, there is no cache-pool being converted,
so there is not 'uncoditional' prompt in this case).
2016-07-27 16:20:57 +02:00
Zdenek Kabelac
5636bfd83d lvconvert: suppress zeroing warning when converting to thin
When volume was lvconvert-ed to a thin-volume with external origin,
then in case thin-pool was in non-zeroing mode
it's been printing WARNING about not zeroing thin volume - but
this is wanted and expected - so nothing to warn about.

So in this particular use case WARNING needs to be suppressed.

Adding parameter support for lvcreate_params.

So now lvconvert creates 'normal thin LV' in read-only mode
(so any read will 'return 0' for a moment)
then deactivate regular thin LV and reacreate in 'final R/RW' mode
thin LV with external origin and activate again.
2016-07-27 16:20:57 +02:00
Peter Rajnoha
070c0d31ab metadata: fix automatic updates of PV extension headers to newest version
Before, the automatic update from older to newer version of PV extension
header happened within vg_write call. This may have caused problems under
some circumnstances where there's a code in between vg_write and vg_commit
which may have failed. In such situation, we reverted precommitted metadata
and put back the state to working version of VG metadata.

However, we don't have revert for PV write operation at the moment. So
if we updated PV headers already and we reverted vg_write due to failure
in subsequent code (before vg_commit), we ended up with lost VG metadata
(because old metadata pointers got reset by the PV write operation).

To minimize problematic situations here, we should put vg_write and
vg_commit that is done after PV header rewrites as close to each
other as possible.

This patch moves the automatic PV header rewrite for new extension
header part from vg_write to _vg_read where it's done the same way
as we do any other VG repairs if detected during VG read operation
(under VG write lock).
2016-07-26 16:22:55 +02:00
Alasdair G Kergon
d180bf6311 lvconvert: --trackchanges requires --splitmirrors 1 2016-07-25 21:15:25 +01:00
Alasdair G Kergon
1efb1c2343 lvconvert: --trackchanges requires --splitmirrors 2016-07-25 19:32:10 +01:00
Peter Rajnoha
94141c7797 man: add note about 'lastlog' built-in command 2016-07-25 15:05:08 +02:00
Alasdair G Kergon
5397837a9f segtype: Fix unrecognised flag message.
Show in hex not decimal.
2016-07-25 12:59:50 +01:00
Zdenek Kabelac
27a767d5e8 lvconvert: reusing old cache pool metadata needs -Zn
When cache pool is reused for a new cached volume, there is
normally no need to 'keep' old cache-pool metadata as this
could cause major data lose.

Unlike with 'lvcreate -H -LX --cachepool' conversion, this lvconvert
path left the metadata unzeroed - partly for making easier some
debugging, but this was rather a bug.

So to keep possible reattach of 'unzeroed' metadata, user
now has to use 'lvconvert -Zn' for such conversion. In this case
the prompt will appear about possibe data loss and to proceed,
user has to confirm such operation. Without -Zn metadata are wiped.
2016-07-22 14:40:26 +02:00
Zdenek Kabelac
6dc4d03508 lvconvert: enable work with partial LVs
Fix printed message and enable handling of missing PVs.
2016-07-19 17:39:41 +02:00
Alasdair G Kergon
9c6a26f50a post-release 2016-07-15 22:02:58 +01:00
Alasdair G Kergon
3d717b52c1 pre-release 2016-07-15 21:55:38 +01:00
Zdenek Kabelac
e1112227d1 lvresize: fix zero size extension
Commit ca878a3426 changed behavior
or resize operation. Later the code has been futher changed
to skip fs resize completely when size of LV is already matching
and finaly at the most recent resize changeset for resize the
check for matching size has been eliminated as well so we ended
with a request call to resize fs to 0 size in some cases.

This commit reoders some test so the prompt happens just once before
resize of possibly 2 related volumes.

Also extra test for having LV already given size is added, and
whole metadata update is skipped for this case as the only
result would be an increment of seqno.

However the filesystem is still resized when requested,
so if the LV has some size and the resize is resolved to
the same size, the filesystem resize is called so in case FS
would not match, the resize will happen.
2016-07-13 21:52:04 +02:00
Zdenek Kabelac
34c55d98ee tests: add LVM_LOG_FILE_MAX_LINES
When logging to epoch files we would like to prevent creating too large
log files otherwise a spining command could fulfill available space
very easily and quickly.

Limit for to 100000 per command.
2016-07-11 12:43:28 +02:00
Alasdair G Kergon
f6b98ec7ca post-release 2016-07-06 17:04:25 +01:00
Alasdair G Kergon
8ca874bc1f pre-release 2016-07-06 16:55:44 +01:00
Alasdair G Kergon
fb0a671419 post-release 2016-07-06 01:14:33 +01:00
Alasdair G Kergon
6022715c81 pre-release 2016-07-06 00:59:28 +01:00
Alasdair G Kergon
d8c2677ab9 raid0: Add raid0_meta segment type. 2016-07-01 22:20:54 +01:00
Zdenek Kabelac
458918b319 thin: fix link validation for unused thin-pool
This patch fixes link validation for used thin-pool.
Udev rules correctly creates symlinks only for unused new thin-pool.
Such thin-pool can be used by foreing apps (like Docker) thus
has  /dev/vg/lv link.
However when thin-pool becomes used by thinLV - this link is no
longer exposed to user - but internal verfication missed this
and caused messages like this to be printed upon 'vgchange -ay':

The link /dev/vg/pool should have been created by udev but it was not
found. Falling back to direct link creation.

And same with 'vgchange -an':
The link /dev/vg/pool should have been removed by udev but it is still
present. Falling back to direct link removal.

This patch ensures only unused thin-pool has this link.
2016-07-01 00:44:46 +02:00
Alasdair G Kergon
aed8bc8ae7 macros: Use is_power_of_2. 2016-06-30 17:59:44 +01:00
Alasdair G Kergon
686acce23f lvconvert: Conversions between striped and raid0. 2016-06-28 23:44:15 +01:00
Alasdair G Kergon
79446ffad7 raid: Infrastructure for raid takeover. 2016-06-28 02:42:30 +01:00
David Teigland
5a327755b4 WHATS_NEW: add recent changes 2016-06-28 02:28:57 +01:00
Alasdair G Kergon
a46f524247 post-release 2016-06-25 20:47:49 +01:00
Alasdair G Kergon
887f071b25 pre-release 2016-06-25 20:35:14 +01:00
Alasdair G Kergon
e99a31c950 Revert "locking: trace errors from dir creation"
This reverts commit fa69ed0bc8.

This code sometimes expects to be presented with a read-only filesystem
(during some boot sequences for example) and copes appropriately with
this and it should not lead to expected error messages that might cause
unnecessary alarm.
2016-06-23 21:31:49 +01:00
Zdenek Kabelac
7092c6ba10 lvresize: support more resized LVs
Add code to support more LVs to be resized through a same code path
using a single lvresize_params struct.
(Now it's used for thin-pool metadata resize,
next user will be snapshot virtual resize).

Update code to adjust percent amount resize for use_policies.

Properly activate inactive thin-pool in case of any pool resize
as the command should not 'deffer' this operation to next activation.
2016-06-23 14:59:27 +02:00
Zdenek Kabelac
fa69ed0bc8 locking: trace errors from dir creation 2016-06-23 14:57:06 +02:00
Zdenek Kabelac
dc8c5c1886 monitoring: preserve monitoring status during update
Ignore monitoring during whole update (suspend/resume) of thin-pool.
2016-06-23 14:56:10 +02:00
Zdenek Kabelac
eb51be4fbe activation: _lv_active returns 0 on error
We have only 2 users of _lv_active() - one was already checking for ==1
while the other use (_lv_is_active()) could have take '-1' as a sign of having
an LV active. So return 0 and log_debug also the reason while detection
has failed (i.e. in case  --driverload n  - it's kind of expectable,
but might have confused user seeing just <backtrace>).
2016-06-23 14:55:35 +02:00
Zdenek Kabelac
af36f5ad36 activation: switch to warning
Since this function does not have a way to return error use correct
reporting level as warning.
2016-06-23 14:53:59 +02:00
Alasdair G Kergon
dfc516f9bf lvconvert: Refactor argument handling code.
Begin disentangling the different lvconvert modes of operation
from each other.
2016-06-22 18:40:22 +01:00
Peter Rajnoha
92caebab95 report: add --logonly arg to report only log for a command 2016-06-20 11:33:43 +02:00
Peter Rajnoha
1127b090bd conf: add log/command_log_selection config setting 2016-06-20 11:33:43 +02:00
Peter Rajnoha
cee1aedf12 log: use separate 'orphan' report object type for orphan VGs 2016-06-20 11:33:43 +02:00
Peter Rajnoha
89e2aef63a tools: add 'lvm lastlog' command for interactive query and display of last command's log
If we're running in lvm shell, we can keep last command's log report
for further query with possible different selection criteria for easy
log lookup.
2016-06-20 11:33:43 +02:00
Peter Rajnoha
0ab1187740 log: annotate processing code with report_current_object_cmdlog 2016-06-20 11:33:43 +02:00
Peter Rajnoha
6ca28ca4c6 log: annotate processing code with log_set_report_{context,object_type,id_and_name} 2016-06-20 11:33:43 +02:00
Peter Rajnoha
f50d4011cd log: also pass log_print through report and add log_print_bypass_report for use in libdm-report for direct print without report
log_print is used during cmd line processing to log the result of the
operation (e.g. "Volume group vg successfully changed" and similar).

We don't want output from log_print to be interleaved with current
reports from group where log is reported as well. Also, the information
printed by log_print belongs to the log report too, so it should be
rerouted to log report if it's set.

Since the code in libdm-report which is responsible for doing the report
output uses log_print too, we need to use a different kind of log_print
which bypasses any log report currently used for logging (...simply,
we can't call log_print to output the log report itself which in turn
would again reroute to report - the report would never get on output
this way).
2016-06-20 11:33:42 +02:00
Peter Rajnoha
7d4a15e53a log: log warnings and errors via report if set; add log_set_report* fns
This patch adds structures and functions to reroute error and warning
logs to log report, if it's set.

There are 5 new functions:
  - log_set_report
    Set log report where logging will be rerouted.

  - log_set_report_context
    Set context globally so any report_cmdlog call will use it.

  - log_set_report_object_type
    Set object type globally so any report_cmdlog call will use it.

  - log_set_report_object_name_and_id
    Set object ID and name globally so any report_cmdlog call will use it.

  - log_set_report_object_group_and_group_id
    Set object group ID and name globally so any report_cmdlog call will use it.

These functions will be called during LVM command processing so any logs
which are rerouted to log report contain proper information about current
processing state.
2016-06-20 11:33:42 +02:00
Peter Rajnoha
8cfc385491 toollib: make it possible to also process internal VGs, add 'include_internal' switch to process_each_vg fn
The lvm fullreport works per VG and as such, the vg, lv, pv, seg and
pvseg subreport is done for each VG. However, if the PV is not part of
any VG yet, we still want to display pv and pvseg subreports for these
"orphan" PVs - so enable this for lvm fullreport's process_each_vg call.
2016-06-20 11:33:42 +02:00
Peter Rajnoha
b864a06221 report: recognize selection (-S|--select) for each subreport; make -S|--select groupable 2016-06-20 11:33:42 +02:00
Peter Rajnoha
e081203f3e report: recognize list of keys to sort report by (-O|--sort) for each subreport; make -O|--sort groupable 2016-06-20 11:33:42 +02:00
Peter Rajnoha
28b4c48e2a args: add --configreport arg 2016-06-20 11:33:42 +02:00
Peter Rajnoha
d23c5b9318 args: add priorities for grouping args
Groupable args (the ones marked with ARG_GROUPABLE flag) start a new
group of args if:
  - this is the first time we hit such a groupable arg,
  - or if non-countable arg is repeated.

However, there may be cases where we want to give priorities when
forming groups and hence force new group creation if we hit an arg
with higher grouping priority.

For example, let's assume (for now) hypothetical sequence of args used:

  lvs -o lv_name --configreport log -o log_type --configreport lv -o +vg_name

Without giving any priorites, we end up with:

  lvs -o lv_name --configreport log -o log_type --configreport lv -o +vg_name
     |                            | |                           | |          |
     \__________GROUP1___________/   \________GROUP2___________/   \_GROUP3_/

This is because we hit "-o" as the first groupable arg. The --configreport,
even though it's groupable too, it falls into the previous "-o" group.

While we may need to give priority to the --configreport arg that should
always start a new group in this scenario instead:

  lvs -o lv_name --configreport log -o log_type --configreport lv -o +vg_name
      |         | |                            | |                           |
      \_GROUP1_/   \_________GROUP2___________/   \_________GROUP3__________/

So here "-o" started a new group but since "--configreport" has higher
priority than "-o", it starts fresh new group now and hence the rest of
the command line's args are grouped by --configreport now.
2016-06-20 11:33:42 +02:00
Peter Rajnoha
9c37b7ed7c conf: add report/{vgs,pvs,lvs,pvsegs,segs}_{cols,sort}_full config settings 2016-06-20 11:33:42 +02:00
Peter Rajnoha
26c43c6ce5 commands: report: add lvm fullreport command
lvm fullreport executes 5 subreports (vg, pv, lv, pvseg, seg) per each VG
(and so taking one VG lock each time) within one command which makes it
easier to produce full report about LVM entities.

Since all 5 subreports for a VG are done under a VG lock, the output is
more consistent mainly in cases where LVM entities may be changed in
parallel.
2016-06-20 11:33:42 +02:00
Peter Rajnoha
c099f531fb toollib: add report_group and log_rh to processing_handle and initialize cmd processing log report
Wire up report group creation with log report in struct
processing_handle and call report_format_init during processing handle
initialization (init_processing_handle fn) and destroy it while
destroing processing handle (destroy_processing_handle fn).

This way, all the LVM command processing using processing handle
has access to log report via which the current command log
can be reported as items are processed.
2016-06-20 11:33:41 +02:00
Peter Rajnoha
bd0a0ae36b conf: add log/report_command_log config setting 2016-06-20 11:33:41 +02:00
Peter Rajnoha
a08e02afbf conf: add report/output_format config setting
New report/output_format configuration sets the output format used
for all LVM commands globally. Currently, there are 2 formats
recognized:
   - basic (the classical basic output with columns and rows, used by default)
   - json (output is in json format)
2016-06-20 11:33:41 +02:00
Peter Rajnoha
79a74e9aae toollib: add report_format_init fn to create report group and to create/add log report handle
Add new --reportformat option and new report_format_init function that
checks this option and creates new report group accordingly, also
preparing log report handle and adding it to the report group just
created.
2016-06-20 11:33:41 +02:00
Peter Rajnoha
c36d4632a6 conf: add log/command_log_{sort,cols} config settings 2016-06-20 11:33:40 +02:00
Peter Rajnoha
99c2a2b960 report: add CMDLOG report type
This is a preparation for new CMDLOG report type which is going to be
used for reporting LVM command log.

The new report type introduces several new fields (log_seq_num, log_type,
log_context, log_object_type, log_object_group, log_object_id, object_name,
log_message, log_errno, log_ret_code) as well as new configuration settings
to set this report type (report/command_log_sort and report/command_log_cols
lvm.conf settings).

This patch also introduces internal report_cmdlog helper function
which is a wrapper over dm_report_object to report command log via
CMDLOG report type and which is going to be used throughout the code
to report the log items.
2016-06-20 11:33:08 +02:00
Alasdair G Kergon
ab7ade4095 post-release 2016-06-17 14:10:20 +01:00
Alasdair G Kergon
38cc03605c pre-release 2016-06-17 14:10:20 +01:00
Alasdair G Kergon
49a8d1a85e post-release 2016-06-11 00:14:00 +01:00
Alasdair G Kergon
f2d1f5e927 pre-release 2016-06-11 00:08:08 +01:00
David Teigland
8a667f5887 WHATS_NEW: add recent changes 2016-06-10 13:39:23 -05:00
Zdenek Kabelac
35612bd27c display: yes no prompt improvement
Original code missed to catch all apperances of SIGINT.
Also enhance logging when running in shell without tty.
Accept this regex as valid input:
'^[ ^t]*([Yy]([Ee]([Ss]|)|)|[Nn]([Oo]|))[ ^t]*$'
2016-06-10 16:00:31 +02:00
Peter Rajnoha
cfdc87b623 lvmdump: also collect output from lsblk command when running lvmdump -s
lsblk provides nice and quick overview of the storage/sysfs structure
that is useful for debugging - collect its output when running lvmdump -s.
2016-06-09 13:54:15 +02:00
Peter Rajnoha
7ae05adf46 blkdeactivate: fix regression in blkdeactivate causing dm and md devices to be skipped.
Commit #5b3a4a9 caused the "name" variable to be cleared if
declaration and assignment is on two lines so put it back
so it's on one line for it to work again.
2016-06-06 14:57:46 +02:00
Alasdair G Kergon
7c894911ae post-release 2016-06-03 23:20:43 +01:00
Alasdair G Kergon
767c9d653e pre-release 2016-06-03 23:16:50 +01:00
Zdenek Kabelac
8e4db009b8 cleanup: compile fixes for --disable-devmapper
Make lvm2 compilable when configured with: --disable-devmapper.
2016-06-03 12:46:43 +02:00
Peter Rajnoha
687bc5cecf lvmconfig: fix lvmconfig --type diff to display complete diff if config cascade used
If configuration consists of several sources in config cascade
("config cascade" defined in man lvmconfig(8)), lvmconfig displayed
only difference from defaults of the topmost config in the cascade.
Fix lvmconfig to display complete difference, considering all
the configuration in the cascade.

For example, before this patch:

	(use_lvmetad=0 set in lvm.conf which differs from defaults)
	$ lvmconfig --type diff
	global {
		use_lvmetad=0
	}

	(compact_output=1 set on cmd line)
	$ lvmconfig --type diff --config report/compact_output=1
	report {
		compact_output=1
	}

	(headings=0 set in profile)
	$ lvmconfig --type diff --commandprofile test
	report {
		headings=0
	}

	(difference in topmost configuration source is displayed)
	$ lvmconfig --type diff --commandprofile test --config report/compact_output=1
	report {
		compact_output=1
	}

With this patch applied (the config cascade is merged before looking for
difference from defaults in configuration):

	$ lvmconfig --type diff
	global {
		use_lvmetad=0
	}

	$ lvmconfig --type diff --config report/compact_output=1
	report {
		compact_output=1
	}
	global {
		use_lvmetad=0
	}

	$ lvmconfig --type diff --profile test
	report {
		headings=0
	}
	global {
		use_lvmetad=0
	}

	$ lvmconfig --type diff --profile test --config report/compact_output=1
	report {
		headings=0
		compact_output=1
	}
	global {
		use_lvmetad=0
	}
2016-06-02 13:49:38 +02:00
Zdenek Kabelac
d37a26b680 devices: handle partscan loop devices
Treat loop device created with 'losetup -P' as regular
partitioned device - so if it has partition table,
prevent its usage in commands like 'pvcreate'.

Before 'pvcreate /dev/loop0' could have erased and formated as PV,
after this patch, device is filtered out and cannot be used.
2016-06-01 17:37:47 +02:00
Peter Rajnoha
e4ec6bcdd3 report: fix lvm devtypes internal error if -S is used with field name from pvs/vgs/lvs
Before this fix, when reporting 'lvm devtypes', the report was
initialized with incorrect reserved values - the ones used for
pvs/vgs/lvs report were used instead of NULL value (because devtypes
doesn't have any reserved values).

For example, trying to (incorrectly) use lv_name for the -S|--select
with lvm devtypes which doesn't have this field at all:

Before this patch (internal error issued):

$ lvm devtypes -S 'lv_name=lvol0'
  Internal error: _check_reserved_values_supported: field-specific reserved value of type 0x0 for field  not supported
  Internal error: dm_report_init_with_selection: trying to register unsupported reserved value type, skipping report selection
  DevType       MaxParts Description
  aoe                 16 ATA over Ethernet
  ataraid             16 ATA Raid
  bcache               1 bcache block device cache
  ...

With this patch applied (correct error displayed about
unrecognized selection field):

$ lvm devtypes -S 'lv_name=lvol0'
  Device Types Fields
  -------------------
    devtype_name           - Name of Device Type exactly as it appears in /proc/devices. [string]
    devtype_max_partitions - Maximum number of partitions. (How many device minor numbers get reserved for each device.) [number]
    devtype_description    - Description of Device Type. [string]

  Special Fields
  --------------
    selected               - Set if item passes selection criteria. [number]
    help                   - Show help. [unselectable number]
    ?                      - Show help. [unselectable number]

  Unrecognised selection field: lv_name
  Selection syntax error at 'lv_name=lvol0'.
  Use 'help' for selection to get more help.
2016-05-30 16:46:18 +02:00
Zdenek Kabelac
ecfb90de74 report: convert more options to use single status
Convert fields into using a single status ioctl call per LV.
This is a bit tricky since when there are more complicated
stacks, at this moment its undefined which values should be shown.

It's clear we need to cache more then single ioctl per LV,
but also we need to define more explicitely relation between
reported values for snapshots.

This patch is not a final state, rather a transitional step.
It should not be giving more 'worst' values then previous
many-ioctl-calls-per-lv solution.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
92eba53a79 lv: introduce lvseg_percent_with_info_and_seg_status
Add function to obtain percentage value for cache lv_seg_status.
This API is rather evolving 'middle' step as the ultimate goal
is segment API fuctionality.

But first we need to be clear at reporting level which values
are needed to be reported for which LVs and segments.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
f7f395667e lvstatus: enhance seg_status to handle snapshot
Add more code to properly store status for snapshot segment
maintaining lvm2 fiction of COW and snapshot internal volumes.

The key issue here is however not though-through reporting
logic - as there is no single answer for whole line state.
It not counting with layer and we may need few more ioctl to
cover all reporting needs depending upon what is actually
needed.

In reality we need to 'cache' more ioctl status queries for
individual LVs and their segments (so they checked at most once).

The other 'hard' topic for conversion is mirror segment handling.

Also we definitelly need to relocate some logic into segment's methods,
yet it might be complex as we have not clear border between targets.

TODO: define more clearly how are reporting fields defined in case
we 'stack' volumes like   -   cache of stacked  thin LV snapshot origin.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
067c0a23e5 refresh: call resume after failing suspend
lv_refresh_suspend_resume() has escaped with fail ret code
after failing suspend and could have left many volumes in suspend state.

So always unconditionally call resume also  when suspend has failed.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
1c07e67462 cache: enhance lv_cache_wait_for_clean
Handle passthrough mode when checking cache mode state explicitely.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
0424277c00 cache: call status only on cache pool in use
Check show cache status only for cache pool in use.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
a4f8d1165c setup_task: add with_flush
To get better control when flushing is used add extra arg when
setting up dm task.

By default now check dm device status without flush.
(At this moment this should effect only thin and cache volumes).

Also switch dev_manager_thin_pool_status() to use more
readable 'flush' parameter instead of 'no_flush'.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
26889b3bb6 snapshot: check merging_cow is cow
Check first the LV is cow before even checking it's a merging COW.
Note: previosly merging_cow was also merging origin, so without
this explicit check it used to return '1' also when passed
LV has been merging origin.
2016-05-27 15:47:24 +02:00
Zdenek Kabelac
e9ee2cb6b6 report: fix report copy_percent value
When mirror/raid called copy_percent function to return,
when 100% was supposed to be returned, wrong float 100.0 value
could have been reported back instead of dm_percent_t DM_PERCENT_100.

There is broken API somewhere, since the function here rely on
actively being modifid VG content even when doing 'lvs' operation.
(extents_copies)
2016-05-27 15:47:24 +02:00
David Teigland
b762c37555 WHATS_NEW: include recent changes 2016-05-26 09:13:30 -05:00
Alasdair G Kergon
bf8d00985a raid0: Add raid0 segment type.
This remains experimental and quite restrictive so should only be used
for testing at this stage.  (E.g. lvreduce is not supported.)
2016-05-23 16:46:38 +01:00
Zdenek Kabelac
197066c863 lvchange: allow change of cache mode
Add support for active cache LV.
Handle --cachemode args validation during command line processing.
Rework some lvm2 internal to use lvm2 defined  CACHE_MODE  enums
indepently on libdm defines and use enum around the code instead
of passing and comparing strings.
2016-05-19 18:40:14 +02:00
David Teigland
e694e0896b WHATS_NEW: include recent changes 2016-05-18 09:20:52 -05:00
Alasdair G Kergon
57e9df7dc5 post-release 2016-05-14 02:12:23 +01:00
Alasdair G Kergon
15ca5883fb pre-release 2016-05-14 01:57:42 +01:00
Alasdair G Kergon
b5314c2a6a device: Retry open without O_NOATIME if it fails. 2016-05-12 01:05:52 +01:00
Alasdair G Kergon
04987e7f49 post-release 2016-05-07 00:48:40 +01:00
Alasdair G Kergon
e4caf0beeb pre-release 2016-05-07 00:36:59 +01:00
David Teigland
144169b9b7 WHATS_NEW: duplicate PVs 2016-05-06 09:30:01 -05:00
Zdenek Kabelac
d1ecbfa52d lvcreate: improve --chunksize support for cached volume.
Support parsing --chunksize option also when converting.
Now user can use cache pool created with i.e. 32K chunksize,
while in caching user can select 512K blocks.
Tool is supposed to validate cache metadata size is big enough
to support such chunk size. Otherwise error is shown.
2016-05-05 23:50:10 +02:00
Zdenek Kabelac
4d116d7a28 cleanup: gather version info with single check
As we already collect version info anyway, allow to use it through
a single call (can makes logs shorter and saves ioctl).
2016-05-05 23:34:30 +02:00
Alasdair G Kergon
795e47cec5 post-release 2016-04-30 01:12:33 +01:00
Alasdair G Kergon
e53ecf91f7 pre-release 2016-04-30 01:07:26 +01:00
Alasdair G Kergon
c76df666c9 raid: Use inherited tags when wiping rmeta.
If there's an activation volume_filter, it might not be possible
to activate the rmeta LVs to wipe them.  At least inherit any
LV tags from the parent LV while attempting this.
2016-04-29 19:49:21 +01:00
Alasdair G Kergon
e3efcdc9f5 datastruct: Add str_list_wipe. 2016-04-29 19:47:15 +01:00
Zdenek Kabelac
c215e1be5c lvchange: always check for sigint
Check sigint() state during process_each_lv.
2016-04-26 23:29:08 +02:00
Zdenek Kabelac
d8bdc7af37 lvchange: fix return code
We already opened VG for this - so not an invalid cmdline.
2016-04-26 23:28:01 +02:00
Zdenek Kabelac
84a5b19539 thin: zero and transaction_id also with thin volumes
Show trasaction_id when thin volume was created.
Also show zeroing state of thin-pool with thin volume (so user
doesn't need to lookup thin-pool).
2016-04-26 23:24:51 +02:00
Zdenek Kabelac
588455d03e cache: with cache target 1.9 mq is alias to smq
Avoid useless check for mq policy, it's loaded as smq
and aliased.
2016-04-26 23:24:05 +02:00
Zdenek Kabelac
aa91fe3d3c modprobe: check /sys/module entry first
Before executing modprobe for given module name, just check
if the module is not already present in /sys/module.

Useful when checking dm-cache-policy modules as we do not
having matching interface like for targets.
2016-04-26 23:23:03 +02:00
Peter Rajnoha
2bb33aaf55 udev: rules: remove mpath from 10-dm.rules, superseded by 11-dm-mpath.rules (mpath>=0.6.0)
Multipath 0.6.0 contains new 11-dm-mpath.rules which supersede the rule
that was in 10-dm.rules. The 11-dm-mpath.rules are also more complete,
fixing several other issues. Using the new 11-dm-mpath.rules from
multipath-tools >= 0.6.0 is strongly recommended for proper
DM multipath functionality!

See also:
  http://christophe.varoqui.free.fr
  http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=multipath/11-dm-mpath.rules
2016-04-25 14:55:54 +02:00
Alasdair G Kergon
eb8edccd58 post-release 2016-04-23 00:43:13 +01:00
Alasdair G Kergon
546b2006dd pre-release 2016-04-23 00:41:55 +01:00
Zdenek Kabelac
99e96f3ce9 coverity: fix error paths
Patch 74e704bb44 missed to update
error path. Since now we just need to 'return_0' as 'dmt is NULL
and thus may not be destroyed.
2016-04-22 01:12:34 +02:00
Zdenek Kabelac
cbf99be43a coverity: fix memory access
Commit  52e0d0db44 introduced regression
as code may access   buf[0 - 1].

Reorder code to first remove '\n' and then check buffer size for
empty.
2016-04-22 01:11:57 +02:00
David Teigland
c9373a0c2a WHATS_NEW: disable lvmetad for lvm1 2016-04-21 16:40:44 -05:00
Alasdair G Kergon
01181a299e activate: Hide errors when snapshot merge delayed. 2016-04-21 22:14:10 +01:00
Alasdair G Kergon
0778d2e985 display: Avoid internal snapshot LV names in msgs.
vg/snapshotN should not appear anywhere.

No code should be showing this, but it was noticed in some logs last
week and we can deal with it in display_lvname().
2016-04-21 00:30:17 +01:00
Zdenek Kabelac
600d7ca15f configure: detect for /var/lock dir
Detecs systems with /run/lock dir and use such path directly instead
of /var/lock.
2016-04-20 23:32:51 +02:00
Zdenek Kabelac
88c19d5d72 lvchange: improve refresh for merging thin volume
When running lvchange --refresh on merging thin volume,
try to deactivate snapshot thinLV in case it's preventing
startup of merge process.
2016-04-18 23:05:51 +02:00
Zdenek Kabelac
e2cd882f2e thin: check runtime table line for merging
To recognize in runtime if we are merging or not
to make consistent decision between suspend and resume
add function to parse thin table line when add
merging thin device to the table.
2016-04-18 11:18:35 +02:00