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- Add a 'du' pointer from each struct device when a
dev and du structs are paired. Allows getting du
from dev without a search.
- Add a radix tree pointing to du's on cmd->use_devices,
indexed by devname. Allows quick lookup of du from a
devname.
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.
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.
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.
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 ?)
When PVs are created on LVs, remove the devices file entries
for the PVs when the LVs are removed. In general, the devices
file entries should be removed with lvmdevices --deldev when
the LVs are removed (lvremove is the equivalent of detaching
a device from the system when layering PVs on LVs.)
This change is effectively an automatic lvmdevices --deldev
command that is built into lvremove when the LV has a PV on it.
An OS installer can create system.devices for the system and
disks, but an OS image cannot create the system-specific
system.devices. The OS image can instead configure the
image so that lvm will create system.devices on first boot.
Image preparation steps to enable auto creation of system.devices:
- create empty file /etc/lvm/devices/auto-import-rootvg
- remove any existing /etc/lvm/devices/system.devices
- enable lvm-devices-import.path
- enable lvm-devices-import.service
On first boot of the prepared image:
- udev triggers vgchange -aay --autoactivation event <rootvg>
- vgchange activates LVs in the root VG
- vgchange finds the file /etc/lvm/devices/auto-import-rootvg,
and no /etc/lvm/devices/system.devices, so it creates
/run/lvm/lvm-devices-import
- lvm-devices-import.path is run when /run/lvm/lvm-devices-import
appears, and triggers lvm-devices-import.service
- lvm-devices-import.service runs vgimportdevices --rootvg --auto
- vgimportdevices finds /etc/lvm/devices/auto-import-rootvg,
and no system.devices, so it creates system.devices containing
PVs in the root VG, and removes /etc/lvm/devices/auto-import-rootvg
and /run/lvm/lvm-devices-import
Run directly, vgimportdevices --rootvg (without --auto), will create
a new system.devices for the root VG, or will add devices for the
root VG to an existing system.devices.
Avoid problems for other libc like muslc and use dm_basename.
Prototype for basename has been removed from string.h from latest musl [1]
compilers e.g. clang-18 flags the absense of prototype as error. therefore
include libgen.h for providing it.
[1] https://git.musl-libc.org/cgit/musl/commit/?id=725e17ed6dff4d0cd22487bb64470881e86a92e7
Reported-by: Khem Raj <raj.khem@gmail.com>
Add debug tracing for syscall failures.
Also switch some log_error to log_warn when command does not exit
with 'error' result and only warns user.
Easier error path handling.
Initialize some vars at declaration time.
Make recursive directory path creation reusable via
dir_create_recursive.
While we already have dm_create_dir() - it's not taking mode arg,
so let's make lvm's internal file helper function.
