[Libguestfs] [PATCH nbdkit v2 0/7] server: Add new plugin/filter .block_size

v1 was posted here: https://listman.redhat.com/archives/libguestfs/2022-February/thread.html#... The changes since v1: Extra checks for plugin: * minimum between 1 and 64K * preferred must be a power of 2 * prefered must be 512 .. 32M * maximum must be 0xffff_ffff or a multiple of minimum Same extra checks added to the filter Add the tls-fallback filter patch. This has to be added early on to avoid a bisection problem with the tests. Documentation * fixed minor typos * document what "preferred" means wrt read-modify-write * document returning all zeroes to mean no information Rename new filter to "nbdkit-blocksize-policy-filter" Document how to use nbdkit-blocksize-filter + blocksize-policy together Implement error policy * add new test to cover it However I chose _not_ to implement other error policies. We can extend them in future if required. Rich.