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Instead of using 'key state & key end' uint8_t* switch to use
void* key, & size_t keylen. This allows easier adaptation with
lvm code base with way too much casting with every use of function.
Also correctly mark const buffers to avoid compiled warnings and
casting.
Adapt the only bcache user ATM for API change.
Adapt unit test to match changed API.
Fix commit b65a2c3f3a "vgimportdevices: skip lvmlockd locking"
which intended to disable lvmlockd locking, but the lockd_gl_disable
flag was mistakenly set after lock_global() so it wasn't effective.
This caused vgimportdevices to fail unless locking was started.
Enums are single 'values' so not a proper type for bitfields.
(Probably better to use such values as defines).
Although here 'daemon_talk()' is part of library API, it's hidden
non-public API call - and moreover 'enum' and 'unsigned' are
using the same size, so linker shouldn't have any issue with
this symbol usage.
For this reason there are no 'versioning' tricks applied.
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.
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.
We've got cached DM list before grabbing lock, so there
is some chance, that DM table has changed and we would
need to refresh this info.
TODO: benchmark, whether it would even make sense to refresh cache
and keep it content instead of using individual ioctl() for tree build.
Function that is working with DM target is located within
lib/activate directory.
This function is able to use cached dm_device_list when possible
to quickly resolve checks for device's UUID.
Function can fully replace get_dm_uuid_from_sysfs() and instead
of syscalls for open/read/close get the UUID with single ioctl.
When there is cached dm devs list, we can get many UUID from
a single syscall.
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.
Introduce function to find device's name and uuid for
a given major:minor.
This information is cached with dm_device_list which reads all the
info from single ioctl(DM_DEVICE_LIST).
Lvm keeps major:minor name & uuid for active devices in the system.
