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Commit Graph

16502 Commits

Author SHA1 Message Date
Zdenek Kabelac
2266a1863f lv_manip: add lv_uniq_rename_update
Add function to rename LV to either passed name or if
the name is already in use, generate new lvol% name.
2019-10-21 12:14:15 +02:00
David Teigland
5714c8c9cc pvck: dump metadata search
Improve the implementation of extracting all text metadata
copies from the metadata area.  Use this for the existing
metadata_all dump option.

Add a new metadata_search dump option which does not use
lvm headers to find metadata, but looks in standard
locations.  This is useful if headers are damaged and
can't be used to locate metadata.

Adding '-v' to metadata_all or metadata_search will add
the description and creation_time to the printed list of
metadata instances that are found.
2019-10-18 12:26:29 -05:00
Zdenek Kabelac
4f860f79ff tests: cachevol needs FORMAT2
FORMAT2 is mandatory with cachevols...
2019-10-17 13:03:50 +02:00
Zdenek Kabelac
f07e5c1fe4 tests: skip when raid is not present 2019-10-17 13:03:50 +02:00
Zdenek Kabelac
ec85dfe0f8 cachevol: support removal of cachevol
Removal of cachevol is equivalent of lvconvert --uncache
and works the same way as with cachepool.
2019-10-17 13:03:50 +02:00
Zdenek Kabelac
5938cde11b cache: single code for removal of cached volume
Use same routine for dropping cached LV for cachevol and cachepool.
2019-10-17 13:03:50 +02:00
Zdenek Kabelac
9969361b51 debug: missing trace 2019-10-17 13:03:50 +02:00
Zdenek Kabelac
a255385e3a cachevol: move cvol rename
Move rename of CVOL after archive().
2019-10-17 13:03:50 +02:00
Zdenek Kabelac
dab4a2c893 cachevol: move flag setting after taking archive
Before 'archive()' is called, lvm2 must not touch/modify metadata.
So move setting  CACHE_VOL related flags past this point.

Also make sure reading of cache segtype always restores this
flag properly (even if compatible flag would be lost).
2019-10-17 13:03:50 +02:00
Zdenek Kabelac
f63e20ebcc cache: drop validation check
Since now we can cache either with cache-pool LV or
any other LV (being used as cachevol LV) drop the
validation condition.
2019-10-17 13:03:49 +02:00
Zdenek Kabelac
af8cfa90d9 cache: add more comments for min meta size
Enhance source code with better explanation how the minimal
metadata size is evaluated from data size and chunk size.
2019-10-17 13:03:49 +02:00
Zdenek Kabelac
2a08d6d1d4 cachevol: use CVOL UUID for cdata and cmeta layered devices
Since code is using -cdata and -cmeta UUID suffixes, it does not need
any new 'extra' ID to be generated and stored in metadata.

Since introduce of new 'segtype' cache+CACHE_USES_CACHEVOL we can
safely assume 'new' cache with cachevol will now be created
without extra metadata_id and data_id in metadata.

For backward compatibility, code still reads them in case older
version of metadata have them - so it still should be able
to activate such volumes.

Bonus is lowered size of lv structure used to store info about LV
(noticable with big volume groups).
2019-10-17 13:03:49 +02:00
David Teigland
55bf692bff tests: metadata-zero-space long vgnames
In the hex dump output, grep for the vgname
followed by one space.  This allows for test pids
with up to seven digits, which are used to contruct
the variable vgname used by the test.  Otherwise
the long vgname wraps to the next line and fails to
match in grep.
2019-10-16 09:46:48 -05:00
David Teigland
998e7b1075 writecache: add cvol suffix to attached cachevol
When an LV is used as a writecache cachevol, give
it the LV name a _cvol suffix.  Remove the suffix
when the cachevol is detached, restoring the
original LV name.
2019-10-15 16:03:34 -05:00
David Teigland
81fe045714 cache: change default cachevol metadata sizes
The first part of a cachevol LV is used for metadata,
and the rest of the space is used for data.  The
division of space between metadata and data depends
on the total size of the cachevol.

The previous division gave more space than needed to
metadata, it was:

cachevol size 8M to 128M -> metadata size 16M *
cachevol size 128M to 1G -> metadata size 32M
cachevol size 1G and up  -> metadata size 64M

(* if this resulted in over half the LV used as
metadata, then half the cachevol would be used
for metadata, and the other half for data.)

The division of space now gives less space to
metadata, it is:

cachevol size 8M to 16M  -> metadata size 4M
cachevol size 16M to 4G  -> metadata size 8M
cachevol size 4G to 16G  -> metadata size 16M
cachevol size 16G to 32G -> metadata size 32M
cachevol size 32G and up -> metadata size 64M
2019-10-15 14:36:03 -05:00
David Teigland
0443d00ff1 allow activating known LVs when other LVs have unknown segtypes
When a VG contains some LVs with unknown segtypes, the user
should still be allowed to activate other LVs in the VG that
are understood.

$ lvs foo
  WARNING: Unrecognised flag CACHE_USES_CACHEVOL in segment type cache+CACHE_USES_CACHEVOL.
  WARNING: Unrecognised segment type cache+CACHE_USES_CACHEVOL
  LV    VG  Attr       LSize
  lvol0 foo -wi-------  4.00m
  other foo vwi---u--- 48.00m

$ lvcreate -l1 foo
  WARNING: Unrecognised flag CACHE_USES_CACHEVOL in segment type cache+CACHE_USES_CACHEVOL.
  WARNING: Unrecognised segment type cache+CACHE_USES_CACHEVOL
  Cannot change VG foo with unknown segments in it!
  Cannot process volume group foo

$ lvchange -ay foo/lvol0
  WARNING: Unrecognised flag CACHE_USES_CACHEVOL in segment type cache+CACHE_USES_CACHEVOL.
  WARNING: Unrecognised segment type cache+CACHE_USES_CACHEVOL

$ lvchange -ay foo/other
  WARNING: Unrecognised flag CACHE_USES_CACHEVOL in segment type cache+CACHE_USES_CACHEVOL.
  WARNING: Unrecognised segment type cache+CACHE_USES_CACHEVOL
  Refusing activation of LV foo/other containing an unrecognised segment.

$ lvs foo
  WARNING: Unrecognised flag CACHE_USES_CACHEVOL in segment type cache+CACHE_USES_CACHEVOL.
  WARNING: Unrecognised segment type cache+CACHE_USES_CACHEVOL
  LV    VG  Attr       LSize
  lvol0 foo -wi-a-----  4.00m
  other foo vwi---u--- 48.00m
2019-10-15 14:34:53 -05:00
David Teigland
91ee025d5b cache: change cachevol flags for backward compat
A cachevol LV had the CACHE_VOL status flag in metadata,
and the cache LV using it had no new flag.  This caused
problems if the new metadata was used by an old version
of lvm.  An old version of lvm would have two problems
processing the new metadata:

. The old lvm would return an error when reading the VG
  metadata when it saw the unknown CACHE_VOL status flag.

. The old lvm would return an error when reading the VG
  metadata because it would not find an expected cache pool
  attached to the cache LV (since the cache LV had a
  cachevol attached instead.)

Change the use of flags:

. Change the CACHE_VOL flag to be a COMPATIBLE flag (instead
  of a STATUS flag) so that old versions will not fail when
  they see it.

. When a cache LV is using a cachevol, the cache LV gets
  a new SEGTYPE flag CACHE_USES_CACHEVOL.  This flag is
  appended to the segtype name, so that old lvm versions
  will fail to use the LV because of an unknown segtype,
  as opposed to failing to read the VG.
2019-10-15 09:05:52 -05:00
Zdenek Kabelac
6666c39346 tests: cvol 2019-10-14 15:20:25 +02:00
Zdenek Kabelac
c70bab7531 tests: drop manipulation with 'internal' LV
Cachevol LV is 'internal' LV and should not be 'maintained'  this way
while it's being used as cachevol.
2019-10-14 15:20:25 +02:00
Zdenek Kabelac
1cd308d640 cachevol: drop no longer needed functions
Code is no longer used/needed.
2019-10-14 15:20:25 +02:00
Zdenek Kabelac
201ffbd04a cachevol: use lv_cache_remove
Use same routine for dropping cache.
2019-10-14 15:20:25 +02:00
Zdenek Kabelac
2825ad9dd2 cachevol: improve manipulation with dm tree
Enhance activation of cached devices using cachevol.
Correctly instatiace  cachevol -cdata & -cmeta devices with
'-' in name (as they are only layered devices).
Code is also a bit more compacted (although still not ideal,
as the usage of extra UUIDs stored in metadata is troublesome
and will be repaired later).

NOTE: this patch my brink potentially minor incompatiblity for 'runtime' upgrade
2019-10-14 15:17:50 +02:00
Zdenek Kabelac
a454a1b4ea cachevol: put _cvol as protected suffix.
This revert "drop cvol dm uuid suffix for cachevol LVs"
commit 5191057d9d.
Start using -cvol for  DM UUID.
2019-10-14 15:16:05 +02:00
Zdenek Kabelac
8d8047883e cachevol: use writethrough for partial removal
Instead of using 'noflush' option, switch cache_mode into WRITETHROUGH
which does not require flushing, when user confirmed he does not
want flushing for WRITEBACK (because of (partially) missing caching PV)
2019-10-14 15:15:14 +02:00
Zdenek Kabelac
77deadd3af cachevol: drop LV_CACHE_VOL on detach automatically
Move dropping of cachevol flag into detach function.
TODO: this flag should be internal to lvm2.
2019-10-14 15:15:14 +02:00
Zdenek Kabelac
8a8e6ebba2 cachevol: rename converted LV to _cvol
When converting existing public LV to internally used
'CacheVol' LV - rename LV to LV_cvol.

When splitting CacheVol, remove _cvol suffix.
2019-10-14 15:15:12 +02:00
Zdenek Kabelac
f6d171ffe3 cachevol: wipe 'normal' device
For wiping we activate and clear 'regular' devices,
since in case of whole process interuption (i.e. kill -9)
we leave metadata & DM table and workable state all the time.
2019-10-14 15:14:46 +02:00
Zdenek Kabelac
615e18f5b2 cache: enhance removal function to work with cvol
To keep things simple, use same code for all cache removal functions,
not just for cachepools but also cachevols.
2019-10-14 15:14:25 +02:00
Zdenek Kabelac
6ee83f699b cache: correct condition 2019-10-14 15:14:25 +02:00
Zdenek Kabelac
bc35ccd174 cache: recognize cachevol with lv_cache_remove 2019-10-14 15:14:25 +02:00
Zdenek Kabelac
36944e1009 cache: reload only when switched to cleaner policy
Reload cache target only when lvm2 reload table with
cache with clearer policy.
2019-10-14 15:14:22 +02:00
Zdenek Kabelac
ddaf2002c9 lvconvert: use struct initializer
Always good to keep rest of structure initilized with zeros.
2019-10-14 15:13:47 +02:00
Zdenek Kabelac
e6691aa04b tests: disable caching of VDO
Disable until vdo gets fixed, then require fixed version.
Otherwise test kills kernel
2019-10-14 15:13:47 +02:00
Zdenek Kabelac
76a9a86fd3 lvconvert: fix return value when zeroing fails
Use correct error return code for fail path.
2019-10-14 15:13:33 +02:00
David Teigland
bd21736e8b vgck: let updatemetadata repair mismatched metadata
Let vgck --updatemetadata repair cases where different mdas
hold indepedently valid but unmatching copies of the metadata,
i.e. different text metadata checksums or text metadata sizes.
2019-10-11 12:57:39 -05:00
David Teigland
d6ffc99052 vgck: fix updatemetadata writing different descriptions
vgck --updatemetadata would write the same correct
metadata to good mdas, and then to bad mdas, but the
sequence of vg_write/vg_commit calls betwen good and
bad mdas could cause a different description field to
be generated for good/bad mdas. (The description field
describing the command was recently included in the
ondisk copy of the metadata text.)
2019-10-11 12:57:32 -05:00
David Teigland
fe16d296b0 pvmove: remove some cmirror related code
which is no longer used
2019-10-11 11:31:42 -05:00
Marian Csontos
df26b73b8e test: Minimize data written by metadata-zero-space
The test is checking only 2 megabytes, but is rewriting much more. Bad
for limited ramdisk.
2019-10-09 15:11:03 +02:00
David Teigland
53b97b146d man: lvmcache note dm-cache block size issue 2019-10-08 09:59:38 -05:00
David Teigland
b6240c9188 vgremove: remove internal lvmlock LV
If a VG is forcibly changed from lock_type sanlock to
lock_type none, the internal lvmlock LV is left behind.
If that LV is not removed before vgremove is run on the
VG, then an internal check will be triggered by the
hidden lvmlock LV.  So, check for and remove a left over
lvmlock LV during vgremove.
2019-10-04 12:01:30 -05:00
David Teigland
a22729a557 tests: improve lib wipefs_a
in wipefs fallback, use limited dd and mdadm --zero-superblock
to avoid writing to entire dev in case dev space is provisioned
on write.
2019-10-04 11:06:38 -05:00
Zdenek Kabelac
414f903cdc WHATS_NEW: update 2019-10-04 17:31:55 +02:00
Zdenek Kabelac
ca70dc4540 vdo: add lvs fields to query vdo volume properties
Add lots of vdo fields:

    vdo_operating_mode       - For vdo pools, its current operating mode.
    vdo_compression_state    - For vdo pools, whether compression is running.
    vdo_index_state          - For vdo pools, state of index for deduplication.
    vdo_used_size            - For vdo pools, currently used space.
    vdo_saving_percent       - For vdo pools, percentage of saved space.
    vdo_compression          - Set for compressed LV (vdopool).
    vdo_deduplication        - Set for deduplicated LV (vdopool).
    vdo_use_metadata_hints   - Use REQ_SYNC for writes (vdopool).
    vdo_minimum_io_size      - Minimum acceptable IO size (vdopool).
    vdo_block_map_cache_size - Allocated caching size (vdopool).
    vdo_block_map_era_length - Speed of cache writes (vdopool).
    vdo_use_sparse_index     - Sparse indexing (vdopool).
    vdo_index_memory_size    - Allocated indexing memory (vdopool).
    vdo_slab_size            - Increment size for growing (vdopool).
    vdo_ack_threads          - Acknowledging threads (vdopool).
    vdo_bio_threads          - IO submitting threads (vdopool).
    vdo_bio_rotation         - IO enqueue (vdopool).
    vdo_cpu_threads          - CPU threads for compression and hashing (vdopool).
    vdo_hash_zone_threads    - Threads for subdivide parts (vdopool).
    vdo_logical_threads      - Logical threads for subdivide parts (vdopool).
    vdo_physical_threads     - Physical threads for subdivide parts (vdopool).
    vdo_max_discard          - Maximum discard size volume can recieve (vdopool).
    vdo_write_policy         - Specified write policy (vdopool).
    vdo_header_size          - Header size at front of vdopool.

Previously only 'lvdisplay -m' was exposing them.
2019-10-04 17:31:55 +02:00
Zdenek Kabelac
862aa06e5e vdo: remember configure VDO write policy in metadata
Store write_policy in vdopool metadata.
In case it's not present 'auto' is selected.
2019-10-04 17:31:55 +02:00
Zdenek Kabelac
7ca9be034f vdo: field update 2019-10-04 17:31:55 +02:00
Zdenek Kabelac
cf8aee096f vdo: introduce get_vdo_write_policy_name 2019-10-04 17:31:55 +02:00
Zdenek Kabelac
c756f76802 vdo: correct internal API for set_vdo_write_policy
This is 'setting' function.
2019-10-04 17:31:55 +02:00
Zdenek Kabelac
9d8a028e8c vdo: keep minimum_io_size in sectors 2019-10-04 17:31:55 +02:00
Zdenek Kabelac
aad91330fe vdo: raise VDO default bio threads to 4
Since 'vdo create' tends to use this setting,
update lvm2 to provide same default.
2019-10-04 17:31:55 +02:00
Zdenek Kabelac
98419e0667 display: try to show status for inactive vdopool
Since we now support activation of 'vdo' volume
without explicit activation of 'vdopool' it's now possible
to have active layer vdopool (-vpool) volume and
having vdopool itself inactive - yet still in this
case we can show available stats for this volume.
But we need to show correct activation status and other
standard info.
2019-10-04 17:31:55 +02:00