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Commit Graph

2238 Commits

Author SHA1 Message Date
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
9fe4f2337b cleanup: drop assign before use
Drop unneeded assigns singe vars are set later in code before
their first use (Coverity).
2016-10-03 17:49:55 +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
094488ffab cleanup: remove unused variables 2016-09-21 15:53:50 +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
Zdenek Kabelac
72abf692e5 debug: cleanup backtrace after log_error 2016-09-19 14:00:56 +02:00
Zdenek Kabelac
a029123679 debug: mention origin_only in message 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
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
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
Zdenek Kabelac
784b46ef2a debug: better verbose message 2016-08-29 20:51:16 +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
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
40a4f5f38f alloc: Record PV tags of parallel PVs in log. 2016-08-24 15:49:34 +01:00
Alasdair G Kergon
68adf2c199 alloc: Move _log_parallel_areas. 2016-08-24 15:47:38 +01:00
Alasdair G Kergon
c1a0a2c712 toollib: Record whether or not stripes/stripe_size args supplied. 2016-08-19 13:51:43 +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
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
Heinz Mauelshagen
9c9b9b276a raid_manip: pay attention to PVs listed on command line when allocating MetaLVs
Adding MetaLVs to given DataLVs (e.g. raid0 -> raid0_meta takeover) wasn't
paying attention to any PVs listed on the lvconvert command line.
2016-08-13 00:20:01 +02:00
Heinz Mauelshagen
6d52b17dfc raid_manip: add missing code avoiding MetaLV collocation on the same PV
Adding MetaLVs to given DataLVs (e.g. raid0 -> raid0_meta takeover),
_avoid_pvs_with_other_images_of_lv() was missing code to prohibit
allocation when called with a just allocated MetaLV to prohibit
collaocation of the next allocated MetaLV on the same PV.

- resolves rhbz1366738
2016-08-12 22:46:57 +02:00
Heinz Mauelshagen
a185a2bea2 lvcreate/lvconvert: fix validation of maximum mirrors/stripes
Enforce mirror/raid0/1/10/4/5/6 type specific maximum images when
creating LVs or converting them from mirror <-> raid1.

Document those maxima in the lvcreate/lvconvert man pages.

- resolves rhbz1366060
2016-08-12 19:14:28 +02:00
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
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
Alasdair G Kergon
6f236c3353 raid: Add workaround to prepare for raid4 conversions. 2016-08-07 00:07:06 +01:00
Alasdair G Kergon
ba0c26a078 raid: Pass list of LVs to remove into more fns. 2016-08-06 23:46:45 +01:00
Alasdair G Kergon
30884208d4 raid: Move two functions. 2016-08-06 23:29:27 +01:00
Heinz Mauelshagen
8f25ad6416 raid_manip: fix log print format from commit d2c3b23e6d 2016-08-05 16:29:56 +02:00
Heinz Mauelshagen
d2c3b23e6d lvchange: Allow device specification when requesting a repair
'lvchange --resync LV' or 'lvchange --syncaction repair LV' request the
RAID layout specific parity blocks in raid4/5/6 to be recreated or the
mirrored blocks to be copied again from the master leg/copy for raid1/10,
thus not allowing a rebuild of a particular PV.

Introduce repeatable option '--[raid]rebuild PV' to allow to request
rebuilds of specific PVs in a RaidLV which are known to contain corrupt
data (e.g. rebuild a raid1 master leg).

Add test lvchange-rebuild-raid.sh to test/shell doing rebuild
variations on raid1/10 and 5; add aux function check_status_chars
to support the new test.

 - Resolves rhbz1064592
2016-08-05 16:01:46 +02:00
Alasdair G Kergon
91f866f786 raid: Tell lib whether stripesize was specified 2016-08-05 14:28:14 +01:00
Alasdair G Kergon
7482ff93b8 raid: Turn lv_raid_change_image_count into wrapper
Eventually the separate entry point will disappear.
2016-08-05 14:17:54 +01:00
Alasdair G Kergon
b66fa91c46 segtypes: Further segtype macros. 2016-08-05 14:00:40 +01:00
Alasdair G Kergon
b1b0b134ec raid0: Validate presence of raid0 meta_areas more tightly. 2016-08-04 21:15:07 +01:00
Alasdair G Kergon
4a15abe865 striped: Add precise macros for original segtype.
The existing striped macros include raid0 segments.
2016-08-04 01:24:39 +01:00
Alasdair G Kergon
fdc3fcbfce lvconvert: Pass region_size to lv_raid_convert. 2016-08-02 23:51:20 +01:00
Heinz Mauelshagen
d0d03f315b vg_validate: correct min_recovery_rate check message 2016-08-02 15:27:13 +02:00
Heinz Mauelshagen
5765a28456 vg_validate: new RAID segment checks in check_lv_segments()
introduced with commit 8f62b7bfe5 rely on complete
             defintions of the relations between the LVs of a VG.
             Hence only run these checks when the complete_vg flag
             is set on calls to check_lv_segments().

             lvconvert failed in test lvconvert-thin-raid.sh when
             calling check_lv_segments() from _read_segments() without
             providing a complete definition.
2016-08-01 22:42:05 +02:00
Alasdair G Kergon
c490be9134 Revert "thin: when converting a thin pool data or metadata LV from"
This reverts commit 237f84e038.

This case failed:
    lvcreate --type raid1 -m1 -l2 vg99
    lvcreate -aey -l2 -s vg99/lvol0
    lvconvert -m2 vg99/lvol0
2016-08-01 15:17:44 +01:00
Alasdair G Kergon
52d2fa7022 tools: Also recognise segtype with thin and cache.
(--type thin still needs this for lvcreate - more logic should be
shared between lvcreate and lvconvert)
2016-07-30 04:12:58 +01:00
Alasdair G Kergon
d1ff254c3c tools: mirror also supports stripesize 2016-07-30 03:52:49 +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
Heinz Mauelshagen
237f84e038 thin: when converting a thin pool data or metadata LV from
linear to raid1, the linear wasnt't switched to the
      raid1 mapping, thus creating the false impression of
      resilience.
2016-07-29 19:17:12 +02:00
Heinz Mauelshagen
43f4555893 vg_validate: only reject min_recovery_rate in case max_recovery_rate is set and smaller 2016-07-27 23:20:58 +02:00
Heinz Mauelshagen
d46de28a6c vg_validate: add missing check for raid6 segment types 2016-07-27 23:14:46 +02:00
Heinz Mauelshagen
df02917d7e vg_validate: fix seg->extents_copied check introduced with
commit 8f62b7bfe5 and add comment for the member
             to 'struct lv_segment'
2016-07-27 23:09:54 +02:00
Heinz Mauelshagen
8f62b7bfe5 vg_validate: segment check enhancements for raids to catch bogus metadata
General RAID and RAID segment type specific checks are added
to merge.c. New static _check_raid_seg() is called on each segment
of a RaidLV (which have just one) from check_lv_segments().

New checks caught some unititialized segment members
which are addressed here as well:

- initialize seg->region_size to 0 in lvcreate.c for raid0/raid0_meta

- initialize list seg->origin_list in lv_manip.c
2016-07-27 18:17:29 +02:00