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Commit Graph

252 Commits

Author SHA1 Message Date
Zdenek Kabelac
6ebcb0015e cov: add stacktraces
Add stacktraces for unexpected paths.
2024-10-30 13:08:56 +01:00
Zdenek Kabelac
5a3375f958 debug: use major:minor
Print major:minor as in other places.
2024-10-25 01:26:40 +02:00
Zdenek Kabelac
f61572eef2 dev-cache: ensure list has elements
When updating DM cache, check whether the list even has entries
before comparing it with old cached instance.
2024-10-25 01:26:39 +02:00
Zdenek Kabelac
7156b4930d dev-cache: enhance usability of dm cache
With existing code, the cache was working only to the 2nd. locking.
So i.e. when 'lvs' scans system with more then one VG, the caching
was effectively not working.

Update the code, so the label invalidate code is able to update DM
cache - so whenever we take a new lock - we will refresh the cache.

TODO: the refresh ATM does a very simple compare of old a new list
of cached DM device, and with the first spotted difference, it just
fallback to the full rebuild of DM cache - with large amount of active
devices this might not the most efficient way....
2024-10-23 14:10:35 +02:00
Zdenek Kabelac
39b7d1ba8f cleanup: typos in comments
Collection of typos in code comments.
Should have no runtime effect.
2024-08-30 16:51:15 +02:00
Zdenek Kabelac
7da47cea35 cleanup: typos in logging
Fixes various typos in printed/logged messages.
2024-08-30 16:51:15 +02:00
Zdenek Kabelac
22672be97d cov: check for dev_iter_create result
dev_iter_create() may fail in malloc so check
for its error code.
2024-08-09 15:10:18 +02:00
David Teigland
f8aa073a8d Revert "dev-cache: move global variables into cmd struct"
This reverts commit 77be3250d9.
2024-07-08 15:32:41 -05:00
David Teigland
77be3250d9 dev-cache: move global variables into cmd struct
The cmd struct is now required in many more functions, and
it's added as a function arg for most direct dev-cache function
calls.  The cmd struct is added to struct device (dev->cmd) so
that it can be accessed in many other cases where dev-cache
functions are being called from places where getting the cmd
struct is too difficult.
2024-07-03 11:52:32 -05:00
David Teigland
76bd678ce3 devices: isolate fake device setup for config file
Freeing dev-cache from dumb fake device usage.
2024-07-02 16:18:09 -05:00
David Teigland
92fd2cb498 devices: isolate fake dev use for mirror checks
Freeing dev-cache from dumb fake device usage.
2024-07-02 15:07:43 -05:00
David Teigland
ad1d688734 devices: simpler dm devs cache naming
The dm devs cache is separate from the ordinary dev cache,
so give the function names distinct prefixes, using
"dm_devs_cache" to prefix dm devs cache functions.
2024-07-01 11:50:59 -05:00
David Teigland
8b4701d7c4 devices: redo bcache invalidation of PVs on LV 2024-07-01 11:30:51 -05:00
David Teigland
5551e4a1e9 devices: update dm uuid cache naming
replace "dm uuid" with "dm devs" in case it begins
caching more than dm uuids.
2024-07-01 10:59:16 -05:00
David Teigland
5f26c05bf2 Revert "devices: simpler bcache invalidation of PVs on LVs"
This reverts commit 200b05cec0.

Doesn't work to depend on lv name.
2024-07-01 10:59:16 -05:00
David Teigland
200b05cec0 devices: simpler bcache invalidation of PVs on LVs
When a PV is stacked on an LV, the PV needs to be
dropped from bcache before the LV is processed.
The LV can be found in dev-cache using its name
rather than the devno.
2024-06-28 18:19:15 -05:00
David Teigland
b8869e2d4e dev-cache: unify dm uuid cache struct lifetimes
The list of dm devs was in the cmd struct and had a
different lifetime than the radix trees referencing
those dm devs.  Now the list and radix trees are
created and destroyed together.
2024-06-28 18:01:29 -05:00
David Teigland
990f4f7c4f devices: dm uuid related function names
In the context of dm, 'device' refers to a dm device, but
in the context of lvm, 'device' refers to struct device.
Change some lvm function names to make that difference clearer.

dev_manager_get_device_list() -> dev_manager_get_dm_active_devices()
get_device_list() -> get_dm_active_devices()
device_get_uuid() -> dev_dm_uuid(), devno_dm_uuid()
2024-06-28 14:05:53 -05:00
Zdenek Kabelac
336cb32884 device_mapper: empty string for missing uuid
Constify name & uuid within dm_active_device.
Set uuid to "" for case the DM device has no uuid.
Do not store "empty" device uuid in radix tree.
2024-06-21 14:51:25 +02:00
Zdenek Kabelac
cc344c3e69 dev_cache: replace dm_hash with radix_tree
For large device sets our dm_hash can produce larger amounf of mapping
collision and we would need to further increase our has size.

So instead use the radix_tree code which is immune agains growing size
of devices and uses memory more effiecently to store all the paths.
2024-06-21 11:28:54 +02:00
Zdenek Kabelac
e0537559c6 dev-cache: replace btree with radix_tree usage
Instead of less efficient 'btree' switch dev_cache to use
radix_tree, that is generating more efficient tree mapping.

Some direct use of btree iteration replace with our dev_iter code.
2024-06-21 11:28:54 +02:00
Zdenek Kabelac
e30bc9b179 device_mapper: refactor code to lvm library
Move the code around caching active dm device devno, name and uuid
from device_mapper/libdm-iface to dev_cache file - as libdm layer
cares about 'decoding' ioctl data from kernel and caching for use by
lvm stays within lvm.

Introduce:
dev_cache_update_dm_devs
dev_cache_get_dm_dev_by_devno
dev_cache_get_dm_dev_by_uuid

Use radix_tree for searching.
2024-06-21 11:28:54 +02:00
Zdenek Kabelac
915dd18361 typo: fix typos
Typo and indent.
2024-06-03 15:30:05 +02:00
Zdenek Kabelac
cd56b04ef6 cleanup: print MAJOR and MINOR as unsigned
Print directly as %u instead of %d with (int) casting.
2024-05-27 15:35:58 +02:00
Zdenek Kabelac
bbe1b93ed9 hash: increase some default hash table size
Size of these hashes was quite small, so raise the size of
hashed entries to reduce amount of hash collistion.
Select some unique/unused number for hash_create below 8192.
2024-05-27 15:35:57 +02:00
Zdenek Kabelac
01e014a246 device: use device_get_uuid
Replace call to get_dm_uuid_from_sysfs() with use of
device_get_uuid() which gets the same information,
but instead of several syscalls it need either 1 or even 0
when the information is cached with newer kernels.
2024-05-27 15:35:57 +02:00
Zdenek Kabelac
5da282fa23 device: propagate struct cmd_context
For better use of cached data located within cmd_context,
pass this structure from the top level function.
Also add missing '_' for static _dev_cache_index_devs.
No other change here.
2024-05-27 15:35:17 +02:00
Zdenek Kabelac
a198224666 dev-cache: skip scanning known blockless dirs
Skip scan and stat() for dirs and nodes within known /dev/ paths,
where no block devices are located.

Also strlen(_cache.dev_dir) just once.

TODO: add more dirs to _no_scan (configurable via lvm.conf ?)
2024-05-27 15:16:26 +02:00
Zdenek Kabelac
d8e639ecba dev-cache: collapsing slashes counts string size
_collapse_slashes() already goes through the whole string,
so just return now already known string length.
2024-05-27 15:16:26 +02:00
Zdenek Kabelac
8168b5e71d clenaup: update local static with _ 2024-05-08 01:55:21 +02:00
Zdenek Kabelac
9f4dc4170b cov: sanitize string for file path 2024-05-08 01:55:21 +02:00
Zdenek Kabelac
04b407674c cov: use sscanf buffer size limits
String parsing with buffer size limit.
2024-05-08 01:55:21 +02:00
Zdenek Kabelac
efe2005022 const: drop static keyword
We don't need relocatable space to store 'const' number.
2024-05-04 01:01:57 +02:00
Zdenek Kabelac
8545621d39 cov: replace strcpy with memcpy
When we know the size we can avoid using strcpy.
2024-04-10 00:03:09 +02:00
Zdenek Kabelac
f9fefaaabe refactor: update dm_strncpy to _dm_strncpy
For checked versions of dm_strncpy use inline wrapper _dm_strncpy.
2024-04-04 19:38:21 +02:00
Zdenek Kabelac
995ff58903 refactor: remove (void) from dm_strncpy usage
Start to use dm_strncpy() as unchecked version within source tree.
2024-04-04 19:38:21 +02:00
Zdenek Kabelac
46e013988f cov: check for strftime result 2024-03-25 14:45:09 +01:00
Zdenek Kabelac
ab3c690077 dev-cache: change locales just once 2024-03-25 11:05:05 +01:00
David Teigland
4f9215e70f devices file: rename unused system.devices
If lvm.conf has use_devicesfile=0 and /etc/lvm/device/system.devices
exists, then rename it to system.devices-unused.YYYYMMDD.HHMMSS.
This prevents an old, incorrect system.devices from being used in
the future if lvm.conf is changed to use_devicesfile=1.
2024-02-15 11:40:37 -06:00
Zdenek Kabelac
18d3283157 cov: some stack tracing corrections
Checking some returned values and adding/correcting
some debug tracing.
2024-01-10 14:02:22 +01:00
David Teigland
db03270135 device: remove log_debug for nvme device 2023-11-09 13:31:01 -06:00
David Teigland
be9a64e654 device_id: make dmeventd use system.devices by default
When no dmeventd.devices exists, make it use system.devices
rather than no devices file at all.
2023-10-16 15:40:11 -05:00
Zdenek Kabelac
97770d5aeb debug: check for syscalls
Add some debug checks for possibly failing syscalls.
2023-09-03 22:03:33 +02:00
David Teigland
847f1dd99c device_id: rewrite validation of devname entries
The old approach was too complicated and didn't work correctly
in some cases.
2023-08-04 11:45:40 -05:00
Zdenek Kabelac
5ce236a691 gcc: correct signess comparation
Compare int to int and unsigned to unsigned...
2023-07-13 21:31:18 +02:00
Zdenek Kabelac
f038fc3b17 cov: remove unused but set variables 2023-05-06 20:38:57 +02:00
David Teigland
0eebd9d780 vgimportdevices: fix locking when creating devices file
Take the devices file lock before creating a new devices file.
(Was missed by the change to preemptively create the devices
file prior to setup_devices(), which was done to improve the
error path.)
2022-08-30 14:52:00 -05:00
David Teigland
3b0f9cec7e filter-mpath: get wwids from sysfs vpd_pg83
to compare with wwids in /etc/multipath/wwids when
excluding multipath components.  The wwid printed
from the sysfs wwid file may not be the wwid used
in multipath wwids.  Save the wwids found for each
device on dev->wwids to avoid repeating reading
and parsing the sysfs files.
2022-06-08 15:06:01 -05:00
David Teigland
bfe072e438 devices file: fail if --devicesfile filename doesn't exist
A typo of the filename after --devicesfile should result in a
command error rather than the command falling back to using no
devices file at all.  Exception is vgcreate|pvcreate which
create a new devices file if the file name doesn't exist.
2022-05-27 14:27:03 -05:00
David Teigland
6cb0b44cd2 filter: remove unused EAGAIN case and flag
The case of filters returning EAGAIN and using the
FILTER_AFTER_SCAN flag is no longer used.
2022-04-06 12:51:34 -05:00