Release v26.09 · Open-CAS/open-cas-linux

Changelog:

Updated OCF version (see https://github.com/Open-CAS/ocf/releases/tag/v26.09)
- Added new options for handling prefetch
- Added support for new prefetch ioclass
- Added new options for handling sequence detector
- Added the new statistics (prefetch, cleaner, user/total)
Introduced cache disconnect/connect for in-flight upgrade (adds new cas_bd module; in disconnected mode bdevs are handed over to cas_bd, and cas_cache can be upgraded to a newer version; currently limited to versions with compatible metadata)
Introduced in-flight upgrade target in Makefile including symvers-compatible transition
Added support for kernel version up to 7.2, including support for preemptive kernels
Introduced DKMS RPM (contributed by @Arondight)
Support identifying devices by path (/dev/disk/by-path/)
Introduced netlink interface for telemetry systems integration (experimental; disabled by default; no test coverage yet)
Reproducible ./configure output
Minor fixes in RPM/DEB building scripts
DKMS packages now have -dkms suffix (following a broadly adopted convention)

Bug fixes:

Use RCU in classifier to avoid deadlock in I/O path
Reject BIOs not aligned to the logical block size
Correctly report flush error on cache device failure
Fix installation on systems with usrmerge (make install) - moved binaries to /usr/sbin and /usr/lib
Fix DKMS build on various kernels by fixing target version handling in ./configure (contributed by @kaysond)
DEB removal no longer leaves local-fs.target failing
A few other minor fixes

Tests and CI:

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