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Commit Graph

167 Commits

Author SHA1 Message Date
Zdenek Kabelac
45c06025da cleanup: some typos
Collection of some typos or invalid uppercase or doublespace cases.
2024-05-27 15:35:57 +02:00
Zdenek Kabelac
ecb8399005 lvm: use configure proc dir in lvm.conf
Update some code parts to use configurer /proc from lvm.conf
(so i.e. our testing can use some fake values)
2024-04-15 13:38:44 +02:00
Zdenek Kabelac
27bdd038a8 thin: validate usable volume for external origin
When creating external origin via 'lvcreate --type thin'
add the validation for LV being usable as external origin
since certain LVs cannot be really used this way.
Also call this function early during lvcreate cmdline arg
validation se we do not need to do unecesary operation.
2024-03-16 10:40:54 +01:00
Zdenek Kabelac
5533f034e2 thin_pool: correct refactoring chunk_size
Function to recalc chunk_size according to dev hints needs to be
used after chunk_size is being set to thin pool segment - correct
this ordering mistake introduced in previous refactoring commit.
2024-01-17 17:31:19 +01:00
Zdenek Kabelac
a176184b7d thin_pool: code refactoring
Move common code into thin_pool_set_params()
(just like we use  cache_set_params).
2024-01-10 14:02:22 +01:00
Zdenek Kabelac
4d2311655b lvm-exec: refactor code
Add prepare_exec_args() for reading option list for
thin/cache_repair, thin/cache_check.
2023-07-17 12:44:23 +02:00
Zdenek Kabelac
bdcfd2d730 lvconvert: no metadata for test mode
Avoid trying to build real metadata in --test mode.
2023-07-14 16:20:30 +02:00
Zdenek Kabelac
491ee5d106 cov: hide some messages
Living with these...
2023-07-12 15:18:38 +02:00
Zdenek Kabelac
857f5d6e65 lvconvert: correction for thin conversion
Updates for 39457234db.
Off-by-one for option array - need 20 fields.
Missed to clear lock_args for cachepool.
2023-07-12 15:18:38 +02:00
Zdenek Kabelac
39457234db lvconvert: support conversion to thin volume
Update pool conversion function to handle also conversion of
thick LV to thin LV by moving thick LV into thin pool data LV
and creating fully provissioned thin LV on top of this volume.

Reworking existing conversion to use insert_layer_for_lv co
the uuid is now kept with thin-pool - this should however not
really matter as we are doing full deactivation & activation cycle.

With conversion to thin LV user can use same set of arguments
to set chunk-size.

TODO: add some smart code to decide best values for chunks sizes.
2023-07-10 17:13:32 +02:00
Zdenek Kabelac
60ca2ce20f thin: rename internal function
Names matching internal code layout.
Functionc in thin_manip.c uses thin_pool in its name.
Keep 'pool' only for function working for both cache and thin pools.

No change of functionality.
2022-08-30 13:54:19 +02:00
David Teigland
4a746f7ffc lvremove: fix removing thin pool with writecache on data 2021-05-24 16:09:35 -05:00
Zdenek Kabelac
b4212be2e7 thin: improve 16g support for thin pool metadata
Initial support for thin-pool used slightly smaller max size 15.81GiB
for thin-pool metadata. However the real limit later settled at 15.88GiB
(difference is ~64MiB - 16448 4K blocks).

lvm2 could not simply increase the size as it has been using hard cropping
of the loaded metadata device to avoid warnings printing warning of kernel
when the size was bigger (i.e. due to bigger extent_size).

This patch adds the new lvm.conf configurable setting:
allocation/thin_pool_crop_metadata
which defaults to 0 -> no crop of metadata beyond 15.81GiB.
Only user with these sizes of metadata will be affected.

Without cropping lvm2 now limits metadata allocation size to 15.88GiB.
Any space beyond is currently not used by thin-pool target.
Even if i.e. bigger LV is used for metadata via lvconvert,
or allocated bigger because of to large extent size.

With cropping enabled (=1) lvm2 preserves the old limitation
15.81GiB and should allow to work in the evironement with
older lvm2 tools (i.e. older distribution).

Thin-pool metadata with size bigger then 15.81G is now using CROP_METADATA
flag within lvm2 metadata, so older lvm2 recognizes an
incompatible thin-pool and cannot activate such pool!

Users should use uncropped version as it is not suffering
from various issues between thin_repair results and allocated
metadata LV as thin_repair limit is 15.88GiB
Users should use cropping only when really needed!

Patch also better handles resize of thin-pool metadata and prevents resize
beoyond usable size 15.88GiB. Resize beyond 15.81GiB automatically
switches pool to no-crop version. Even with existing bigger thin-pool
metadata command 'lvextend -l+1 vg/pool_tmeta' does the change.

Patch gives better controls 'coverted' metadata LV and
reports less confusing message during conversion.

Patch set also moves the code for updating min/max into pool_manip.c
for better sharing with cache_pool code.
2021-02-01 12:06:13 +01:00
Zdenek Kabelac
bd0d4de4e2 active: fix compilation without devmapper
Better support for compilation without device-mapper.
2020-09-29 10:43:56 +02:00
Zdenek Kabelac
4de6f58085 thin: use lv_status_thin and lv_status_thin_pool
Introduce structures lv_status_thin_pool and
lv_status_thin  (pair to lv_status_cache, lv_status_vdo)

Convert lv_thin_percent() -> lv_thin_status()
and  lv_thin_pool_percent() + lv_thin_pool_transaction_id() ->
lv_thin_pool_status().

This way a function user can see not only percentages, but also
other important status info about thin-pool.

TODO:
This patch tries to not change too many other things,
but pool_below_threshold() now uses new thin-pool info to return
failure if thin-pool cannot be actually modified.
This should be handle separately in a better way.
2020-09-29 10:43:56 +02:00
Zdenek Kabelac
e414ebef6e thin: pass through whole code
Instead of early 'return 0' let the whole code finish
in case of an error with syncing.
2020-09-25 22:59:35 +02:00
Zdenek Kabelac
678951f635 cleanup: comment typo 2020-09-10 23:55:03 +02:00
Zdenek Kabelac
33c1d2e921 cov: add explicit ret value ignoring
We don't need to check for any error result codes here.
2019-11-14 18:06:42 +01:00
Zdenek Kabelac
4b1dcc2eeb lv_manip: add synchronizations
New udev in rawhide seems to be 'dropping' udev rule operations for devices
that are no longer existing - while this is 'probably' a bug - it's
revealing moments in lvm2 that likely should not run in a single
transaction and we should wait for a cookie before submitting more work.

TODO: it seem more 'error' paths should always include synchronization
before starting deactivating 'just activated' devices.
We should probably figure out some 'automatic' solution for this instead
of placing sync_local_dev_name() all over the place...
2019-08-26 15:32:19 +02:00
Zdenek Kabelac
7c3de2fd93 thin: introduce estimate_thin_pool_metadata_size
Add function for estimation of thin-pool metadata size for given size of
data. Function is using already existing internal API so it can
be reused for resize of thin-pool data.
2019-04-03 13:27:17 +02:00
Zdenek Kabelac
1cc690e911 thin: max thin 2019-03-20 14:37:44 +01:00
Zdenek Kabelac
d19e372795 cleanup: indent 2019-01-28 22:39:10 +01:00
Zdenek Kabelac
78dd9d820d thin: select chunk size as power of 2
Whenever thin-pool chunk size is unspecified and left for lvm calculation
try to select the size as nearest highest power-of-2 instead of
just being a multiple of 64KiB.
2019-01-28 22:17:25 +01:00
David Teigland
18259d5559 Remove unused clvm variations for active LVs
Different flavors of activate_lv() and lv_is_active()
which are meaningful in a clustered VG can be eliminated
and replaced with whatever that flavor already falls back
to in a local VG.

e.g. lv_is_active_exclusive_locally() is distinct from
lv_is_active() in a clustered VG, but in a local VG they
are equivalent.  So, all instances of the variant are
replaced with the basic local equivalent.

For local VGs, the same behavior remains as before.
For shared VGs, lvmlockd was written with the explicit
requirement of local behavior from these functions
(lvmlockd requires locking_type 1), so the behavior
in shared VGs also remains the same.
2018-06-07 16:17:04 +01:00
Joe Thornber
dbba1e9b93 Merge branch 'master' into 2018-05-11-fork-libdm 2018-06-01 13:04:12 +01:00
Rick Elrod
8c453e2e5e cleanup: fix grammar in output - less then -> less than
This minor patch fixes grammar in a few messages which get
printed to users. It also fixes the same grammar mistake in
several comments.

Signed-off-by: Rick Elrod <relrod@redhat.com>
--
2018-05-17 10:37:45 +02:00
Joe Thornber
7f97c7ea9a build: Don't generate symlinks in include/ dir
As we start refactoring the code to break dependencies (see doc/refactoring.txt),
I want us to use full paths in the includes (eg, #include "base/data-struct/list.h").
This makes it more obvious when we're breaking abstraction boundaries, eg, including a file in
metadata/ from base/
2018-05-14 10:30:20 +01:00
Alasdair G Kergon
22789563de thin: Improve overprovisioning and repair warnings. 2017-10-09 19:48:00 +01:00
Zdenek Kabelac
8256170e6a thin: warn about too big chunks size
lvm2 warned about zeroing and too big chunksize (>=512KiB), but
only during lvconvert, so lvcreate was creating thin-pools
without any warning about possible slowness of thin provisioning
because of zeroing.
2017-08-01 11:52:27 +02:00
Zdenek Kabelac
b939ddf80c debug: more display_lvname usage 2017-06-27 08:28:36 +02:00
Zdenek Kabelac
1bd4b0059b cleanup: use display_percent
Replace occurence of %.2f with call of display_percent function.
2017-06-24 17:44:42 +02:00
Zdenek Kabelac
57379157f4 cleanup: update message 2017-06-09 21:49:19 +02:00
Zdenek Kabelac
db5938a4f8 cleanup: define really uses KB
Cleanup also units for DEFAULT_THIN_POOL_OPTIMAL_METADATA_SIZE define
(128MB) and update calcs for it.
2017-06-09 21:49:19 +02:00
Zdenek Kabelac
48ffb996c5 thin: disallow creation of too big thin pools
When a combination of thin-pool chunk size and thin-pool data size
goes beyond addressable limit, such volume creation is directly
prohibited.

Maximum usable thin-pool size is calculated with use of maximal support
metadata size (even when it's created smaller) and given chunk-size.
If the value data size is found to be too big, the command reports
error and operation fails.

Previously thin-pool was created however lots of thin-pool data LV was
not usable and this space in VG has been wasted.
2017-06-08 11:58:36 +02:00
Zdenek Kabelac
719d099693 cleanup: rename internal define
More descriptive name of #define.
2017-06-08 11:07:18 +02:00
Alasdair G Kergon
396377bc03 pre-release
Removing some unused new lines and changing some incorrect "can't
release until this is fixed" comments.  Rename license.txt to make
it clear its merely an included file, not itself a licence.
2017-03-28 16:11:35 +01:00
Zdenek Kabelac
2a139993b4 thin: remove unneeed test for NULL
In this API NULL is not valid parameter so do not check for it.
2017-03-16 01:02:10 +01:00
Zdenek Kabelac
d11b8eef89 cleanup: easier code 2017-03-10 19:33:01 +01:00
Zdenek Kabelac
4d0793f0ec pool: rework handling of passed args
As now we can properly recognize all paramerters for pool creation,
we may drop PASS_ARG_  defines and rely on '_UNSELECTED' or 0 entries
as being those without user given args.

When setting are not given on command line - 'update' function
fill them from profiles or configuration. For this  'profile' arg
was needed to be passed around and since  'VG' itself is not needed,
it's been all replaced with 'cmd, profile, extents_size' args.
2017-03-10 19:33:01 +01:00
Zdenek Kabelac
7c52d550e9 thin: single formula for estimation
Share the same formula for estimation chunk size or metadata size.
Use uint32_t matching type.
2017-03-10 19:33:00 +01:00
Zdenek Kabelac
b8cd0f4808 thin: add new ZERO/DISCARDS_UNSELECTED
To more easily recognize unselected state from select '0' state
add new 'THIN_ZERO_UNSELECTED' enum.
Same applies to THIN_DISCARDS_UNSELECTED.

For those we no longer need to use PASS_ARG_ZERO or PASS_ARG_DISCARDS.
2017-03-10 19:33:00 +01:00
Zdenek Kabelac
acfc82ae29 pool: split chunk size validation
Move cache and thin bits into their respective manipulation files.
When possible directly call respective chunk_size validator.
2017-03-10 19:33:00 +01:00
Zdenek Kabelac
375e4bb3da thin: getting default chunk_size from single place
Basically code moving operation to have a single place resolving
thin_pool_chunk_size_policy.

Supported are generic & performance profiles.

Function is now shared between thin manipulation code and configuration
_CFG logic to obtain defaults and handle correct reporting upward coding
stack.
2017-03-10 19:33:00 +01:00
David Teigland
1e2420bca8 commands: new method for defining commands
. Define a prototype for every lvm command.
. Match every user command with one definition.
. Generate help text and man pages from them.

The new file command-lines.in defines a prototype for every
unique lvm command.  A unique lvm command is a unique
combination of: command name + required option args +
required positional args.  Each of these prototypes also
includes the optional option args and optional positional
args that the command will accept, a description, and a
unique string ID for the definition.  Any valid command
will match one of the prototypes.

Here's an example of the lvresize command definitions from
command-lines.in, there are three unique lvresize commands:

lvresize --size SizeMB LV
OO: --alloc Alloc, --autobackup Bool, --force,
--nofsck, --nosync, --noudevsync, --reportformat String, --resizefs,
--stripes Number, --stripesize SizeKB, --poolmetadatasize SizeMB
OP: PV ...
ID: lvresize_by_size
DESC: Resize an LV by a specified size.

lvresize LV PV ...
OO: --alloc Alloc, --autobackup Bool, --force,
--nofsck, --nosync, --noudevsync,
--reportformat String, --resizefs, --stripes Number, --stripesize SizeKB
ID: lvresize_by_pv
DESC: Resize an LV by specified PV extents.
FLAGS: SECONDARY_SYNTAX

lvresize --poolmetadatasize SizeMB LV_thinpool
OO: --alloc Alloc, --autobackup Bool, --force,
--nofsck, --nosync, --noudevsync,
--reportformat String, --stripes Number, --stripesize SizeKB
OP: PV ...
ID: lvresize_pool_metadata_by_size
DESC: Resize a pool metadata SubLV by a specified size.

The three commands have separate definitions because they have
different required parameters.  Required parameters are specified
on the first line of the definition.  Optional options are
listed after OO, and optional positional args are listed after OP.

This data is used to generate corresponding command definition
structures for lvm in command-lines.h.  usage/help output is also
auto generated, so it is always in sync with the definitions.

Every user-entered command is compared against the set of
command structures, and matched with one.  An error is
reported if an entered command does not have the required
parameters for any definition.  The closest match is printed
as a suggestion, and running lvresize --help will display
the usage for each possible lvresize command.

The prototype syntax used for help/man output includes
required --option and positional args on the first line,
and optional --option and positional args enclosed in [ ]
on subsequent lines.

  command_name <required_opt_args> <required_pos_args>
          [ <optional_opt_args> ]
          [ <optional_pos_args> ]

Command definitions that are not to be advertised/suggested
have the flag SECONDARY_SYNTAX.  These commands will not be
printed in the normal help output.

Man page prototypes are also generated from the same original
command definitions, and are always in sync with the code
and help text.

Very early in command execution, a matching command definition
is found.  lvm then knows the operation being done, and that
the provided args conform to the definition.  This will allow
lots of ad hoc checking/validation to be removed throughout
the code.

Each command definition can also be routed to a specific
function to implement it.  The function is associated with
an enum value for the command definition (generated from
the ID string.)  These per-command-definition implementation
functions have not yet been created, so all commands
currently fall back to the existing per-command-name
implementation functions.

Using per-command-definition functions will allow lots of
code to be removed which tries to figure out what the
command is meant to do.  This is currently based on ad hoc
and complicated option analysis.  When using the new
functions, what the command is doing is already known
from the associated command definition.
2017-02-13 08:20:10 -06:00
Zdenek Kabelac
79121416df thin: add comment with future extension
It could be actually better to use even cache origin in
read-only mode so there could no be some 'acidental'
change being done on this volume.

This however need further tools enhancment - where we would need
to handle whole subtree on 'lvchange -pr/-prw'.
2016-12-18 19:38:51 +01:00
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
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
Alasdair G Kergon
aed8bc8ae7 macros: Use is_power_of_2. 2016-06-30 17:59:44 +01:00
Zdenek Kabelac
698082e678 cleanup: use display_lvname 2016-06-23 14:57:08 +02:00
Zdenek Kabelac
6268d0a080 cleanup: add dots to some messages
Add missing dots and one comment.
2016-06-23 14:57:08 +02:00