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Commit Graph

89 Commits

Author SHA1 Message Date
Zdenek Kabelac
75424dd692 libdm: replace deprecated security_context_t
Use 'char *' instead of deprecated security_context_t.
In more details i.e.:

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1776
2021-04-12 09:54:16 +02:00
Zdenek Kabelac
f1e8437c59 device_mapper: remove unused lines
No need for versioning history in internal version.
2021-03-30 13:07:51 +02:00
Zdenek Kabelac
bee9b5c1d8 cov: mask uninitialized value
Coverity doesn't track ioctl() too well, so let's just make it quiet.
2021-03-10 01:34:27 +01:00
Zdenek Kabelac
7342ab06fc debug: change sys_error to sys_debug
These messages do not cause command error - so changing logging level
to just 'sys_debug' (so visible only with -vvvv)
2021-03-10 01:11:52 +01:00
Zdenek Kabelac
88d04e9173 lvm-file: remove duplication of dm_is_empty_dir 2021-03-10 01:09:14 +01:00
Zdenek Kabelac
b2616cd456 device_mapper: keep bigger size for most ioctls
Actually the idea was to keep 2K ioctl only for certain command,
so keep 16 for them.
2021-03-10 01:07:16 +01:00
Zdenek Kabelac
d3cff64408 libdm-config: replace check for 0
No need to call strlen() when checking for zero length string.
2021-03-08 15:43:27 +01:00
Zdenek Kabelac
2d64ffaee5 hash: use individual hint sizes
Use different 'hint' size for dm_hash_create() call - so
when debug info about hash is printed we can recognize which
hash was in use.

This patch doesn't change actual used size since that is always
rounded to be power of 2 and >=16 - so as such is only a
help to developer.

We could eventually use 'name' arg, but since this would have changed
API and this patchset will be routed to libdm & stable - we will
just use this small trick.
2021-03-08 15:33:15 +01:00
Zdenek Kabelac
8e1771f857 debug: use enclusing "" for debug 2021-03-02 22:57:35 +01:00
Zdenek Kabelac
0b7a4503e5 integrity: mark as user of secure_data
Use the secure_data with integrity target. Not so big difference,
as the secure feature of the integrity target is not used by lvm2.
2021-03-02 22:57:35 +01:00
Zdenek Kabelac
67790d7e3b device_mapper: reduce min_size for flatten
For most ioctl() we do not need to pass so big buffers
and we can reduce amount of zeroed memory blocks.
2021-03-02 22:57:35 +01:00
Zdenek Kabelac
73bea16c92 device_mapper: zero only secure buffers
Securely erase before free() only dm_tasks marked as secure_data.
TODO: think about also using this for libdm/.
2021-03-02 22:56:32 +01:00
Zdenek Kabelac
4b371246f5 device_mapper: simplify line emitter checking 2021-02-10 15:39:03 +01:00
David Teigland
67d8fb1e83 dm: add debugging to include table differences
When dm tables are reloaded, include log_debug info
that will show the details of why the reload is needed.
2021-02-03 13:44:10 -06:00
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
3e06061d82 cov: split check for type assignment
Check that type is always defined, if not make it explicit internal
error (although logged as debug - so catched only with proper lvm.conf
setting).
This ensures later type being NULL can't be dereferenced with coredump.
2020-10-19 16:53:19 +02:00
Zdenek Kabelac
a17ec7e0ba dm: remove created devices on error path
DM tree keeps track of created device while preloading a device tree.
When fail occures during such preload, it will now try to remove
all created and preloaded device. This makes it easier to maintain
stacking of device, since we do not need to check in-depth for
existance of all possible created devices during the failure.
2020-10-19 16:53:19 +02:00
Zdenek Kabelac
18c74666ee thin: validate thin-pool state before sending messages
Alhtough lvm2 does validation on its side, ensure DM code
is not sending messages to failed thin pool.
2020-09-29 10:43:56 +02:00
Zdenek Kabelac
2bfa868f91 device_mapper: enhance error message 2020-09-25 22:59:35 +02:00
Zdenek Kabelac
50a37948b5 vdo: allow passing renamed vdopool name to kernel
Although kernel does not allow to load a new dm table
with renamed vdopool, at least make lvm2 code ready
it it every will get supported.
2020-09-23 13:20:28 +02:00
Zdenek Kabelac
de837c15a5 gcc: keep using unsigned type 2020-09-01 17:57:50 +02:00
Zdenek Kabelac
fd96f1014b gcc: zero-sized array to fexlible array C99
Switch remaining zero sized struct to flexible arrays to be C99
complient.

These simple rules should apply:

- The incomplete array type must be the last element within the structure.
- There cannot be an array of structures that contain a flexible array member.
- Structures that contain a flexible array member cannot be used as a member of another structure.
- The structure must contain at least one named member in addition to the flexible array member.

Although some of the code pieces should be still improved.
2020-09-01 17:57:50 +02:00
Zhao Heming
cc2218b401 gcc: change zero-sized array to fexlible array
this patch makes gcc happy with compiling option: [-Wstringop-overflow=]

Signed-off-by: Zhao Heming <heming.zhao@suse.com>
2020-09-01 17:57:50 +02:00
Zdenek Kabelac
ee0cb17608 gcc: use apropriate type for reading and printing values 2020-08-28 21:43:03 +02:00
David Teigland
a7b2fc8f57 writecache: add settings cleaner and max_age
available in dm-writecache 1.2
2020-06-10 12:15:50 -05:00
David Teigland
d9e8895a96 Allow dm-integrity to be used for raid images
dm-integrity stores checksums of the data written to an
LV, and returns an error if data read from the LV does
not match the previously saved checksum.  When used on
raid images, dm-raid will correct the error by reading
the block from another image, and the device user sees
no error.  The integrity metadata (checksums) are stored
on an internal LV allocated by lvm for each linear image.
The internal LV is allocated on the same PV as the image.

Create a raid LV with an integrity layer over each
raid image (for raid levels 1,4,5,6,10):

lvcreate --type raidN --raidintegrity y [options]

Add an integrity layer to images of an existing raid LV:

lvconvert --raidintegrity y LV

Remove the integrity layer from images of a raid LV:

lvconvert --raidintegrity n LV

Settings

Use --raidintegritymode journal|bitmap (journal is default)
to configure the method used by dm-integrity to ensure
crash consistency.

Initialization

When integrity is added to an LV, the kernel needs to
initialize the integrity metadata/checksums for all blocks
in the LV.  The data corruption checking performed by
dm-integrity will only operate on areas of the LV that
are already initialized.  The progress of integrity
initialization is reported by the "syncpercent" LV
reporting field (and under the Cpy%Sync lvs column.)

Example: create a raid1 LV with integrity:

$ lvcreate --type raid1 -m1 --raidintegrity y -n rr -L1G foo
  Creating integrity metadata LV rr_rimage_0_imeta with size 12.00 MiB.
  Logical volume "rr_rimage_0_imeta" created.
  Creating integrity metadata LV rr_rimage_1_imeta with size 12.00 MiB.
  Logical volume "rr_rimage_1_imeta" created.
  Logical volume "rr" created.
$ lvs -a foo
  LV                  VG  Attr       LSize  Origin              Cpy%Sync
  rr                  foo rwi-a-r---  1.00g                     4.93
  [rr_rimage_0]       foo gwi-aor---  1.00g [rr_rimage_0_iorig] 41.02
  [rr_rimage_0_imeta] foo ewi-ao---- 12.00m
  [rr_rimage_0_iorig] foo -wi-ao----  1.00g
  [rr_rimage_1]       foo gwi-aor---  1.00g [rr_rimage_1_iorig] 39.45
  [rr_rimage_1_imeta] foo ewi-ao---- 12.00m
  [rr_rimage_1_iorig] foo -wi-ao----  1.00g
  [rr_rmeta_0]        foo ewi-aor---  4.00m
  [rr_rmeta_1]        foo ewi-aor---  4.00m
2020-04-15 12:10:32 -05:00
David Teigland
bddbbcb98c writecache: report status fields
reporting fields (-o) directly from kernel:
writecache_total_blocks
writecache_free_blocks
writecache_writeback_blocks
writecache_error

The data_percent field shows used cache blocks / total cache blocks.
2020-01-31 11:52:49 -06:00
Zdenek Kabelac
33c8e4de33 cov: fix memory leak
Reapply 23cc7ddc50 to internal version
of libdm.
2019-11-14 18:05:41 +01:00
Marian Csontos
3e01ff2783 dm: fix compilation of dmsetup
Fix: 889c88e9da
Use correct enum DM_DEVICE_GET_TARGET_VERSION.
2019-10-22 13:39:45 +02:00
Zdenek Kabelac
9d8a028e8c vdo: keep minimum_io_size in sectors 2019-10-04 17:31:55 +02:00
Mikulas Patocka
667b33dd3b dm: introduce DM_GET_TARGET_VERSION
Adds support for the DM_GET_TARGET_VERSION to dmsetup.
It introduces a new comman "target-version" that will accept list
of targets and print their version.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2019-10-04 17:31:55 +02:00
Zdenek Kabelac
46f1d17c74 libdm: implement search for device names for older kernels
Kernels <2.6.27 don't have /sys/dev dir - add code for looking
out device name via longre seach in /sys/block

This makes commands like 'dmsetup dep -o blkdevname' working.
2019-08-09 12:57:07 +02:00
Zdenek Kabelac
e3c4ab0cc7 cache: support no_discard_passdown
Recent kernel version from kernel commit:
de7180ff908b2bc0342e832dbdaa9a5f1ecaa33a
started to report in cache status line new flag:
no_discard_passdown

Whenever lvm spots unknown status it reports:
Unknown feature in status:

So add reconginzing this feature flag and also report this with

'lvs -o+kernel_discards'

When no_discard_passdown is found in status 'nopassdown' gets reported
for this field  (roughly matching what we report for thin-pools).
2019-06-05 15:48:41 +02:00
Zdenek Kabelac
85dbcda150 metadata: allow reading metadata with invalid creation_time
lvm2 till version 2.02.169 (commit 78d004efa8)
was printing invalid creation_time argument into metadata on 32bit arch.

However with commit ba9820b142 we started
to properly validate all input numbers and thus we refused to accept
invalid metadata with 'garbage' string - but this results in the
situation where metadata produced on older lvm2 on 32 bit architecture
will become unreadable after upgrade.

To fix this case - extend libdm parser in a way, that whenever we
find error integer value, we also check if the parsed value is not for
creation_time node and in this case we let the metadata pass through
with made-up date 2018-05-24 (release date of 2.02.169).
2019-05-10 14:40:11 +02:00
Zdenek Kabelac
30a3dda9d6 dm: ensure migration_threshold is big enough
When using caches with BIG pool size (>TB) there is required
to use relatively huge chunk size.  Once the chunksize has
got over 1MiB - kernel cache target stopped writing such chunks
back on this if the migration_threshold remained on default 1MiB
(2048 sectors) size.

This patch ensure, DM layer will not let pass table line which
has not big enough migration threshold that can let pass
at least 8 chunks (independently of lvm2 metadata).
2019-01-21 12:48:50 +01:00
Zdenek Kabelac
18aa541ca2 configure: avoid repeative inclusion of configure.h
Since configure.h is a generated header and it's missing traditional
ifdefs preambule - it can be included & parsed multiple times.
Normally compiler is fine when defines have same value and there is
no warning - yet we don't need to parse this several times
and by adding -include  directive we can ensure every file
in the package is rightly compile with configure.h as the
first header file.
2018-12-21 19:19:50 +01:00
Zdenek Kabelac
3320ab8334 lib: move towards v2 version of VDO format
Drop very old original format of VDO target and focus on V2 version.
So some variables were renamed or replaced.
There is no compatibility preserved (with assumption so far this is
experimental feature and there is no real user).

Note - version currently VDO calls this version 6.2.
2018-12-20 13:26:55 +01:00
Zdenek Kabelac
9785e40b8d dmeventd: resolve compilation of vdo status parsing
A bit of chicken & egg problem - dmeventd needs to use old libdm library.
VDO is only part of new device_mapper internal library.

So include directly source file for parsing status - this fixes usability
problem of VDO plugin introduced with previous Makefile reshaping
patchset.

NOTE: source file needs to be keep then compilable in both environments.

Also add missing copyright header.
2018-12-20 13:26:55 +01:00
Zdenek Kabelac
94237354dd makefiles: correcting login of makefile
Fixing some ordering issue with inclusion of common make.tmpl.
Correcting dependency calculation
Simplifying inclusive makefile
2018-12-17 10:55:20 +01:00
Zdenek Kabelac
d76b4afb8e makefiles: sort 2018-12-17 10:36:52 +01:00
Zdenek Kabelac
db6d9e04af debug: drop extra tracing
Stack tracing after log_error() is not needed.
2018-12-14 15:14:48 +01:00
Zdenek Kabelac
0b19387dae headers: use configure.h as 1st. header
Ensure configure.h is always 1st. included header.
Maybe we could eventually introduce gcc -include option, but for now
this better uses dependency tracking.

Also move _REENTRANT and _GNU_SOURCE into configure.h so it
doesn't need to be present in various source files.
This ensures consistent compilation of headers like stdio.h since
it may produce different declaration.
2018-12-14 15:09:13 +01:00
Zdenek Kabelac
38c7ba315d device_mapper: move internal header to front 2018-12-01 01:04:27 +01:00
Zdenek Kabelac
93dfb5dd3e device_mapper: optimize dm_pool_strndup 2018-12-01 01:04:27 +01:00
Zdenek Kabelac
c61c4271a4 device_mapper: fix incorrect dm_strncpy usage
Patch 668c9d0762 introduced regression,
since the code here would actually always return failing result.
Replace it with more simple call to strndup().
2018-12-01 01:04:27 +01:00
Zdenek Kabelac
98c21e98b2 makefiles: improving cleaning rules 2018-11-29 23:05:43 +01:00
Zdenek Kabelac
f54ead831f makefiles: avoid dependency calcs for base dir
For some targets we do not want to generate dependencies.
Also add note about usage of such Makefile - it might be
possibly better to rename it to different filename to avoid
any confusion.
2018-11-29 23:05:43 +01:00
Zdenek Kabelac
55a8d6c86b libdm: add memory barrier
Just for case ensure compiler is not able to optimize
memset() away for resources that are released.

This idea of using memory barrier is taken from openssl.

Other options would be to check for 'explicit_bzero' function.
2018-11-17 00:30:50 +01:00
Zdenek Kabelac
43f8da7699 libdm: print params only for ioctls using them
When preparing ioctl buffer and flatting all parameters,
add table parameters only to ioctl that do process them.

Note: list of ioctl should be kept in sync with kernel code.
2018-11-17 00:30:50 +01:00
Zdenek Kabelac
1ae5bf2b83 libdm: add DM_DEVICE_ARM_POLL
Expose DM_DEVICE_ARM_POLL via standard API enum.
2018-11-17 00:30:50 +01:00