search for: split_cach

...s: %m", filenames[i]); + h->files[i].can_extents = false; + } + else + h->files[i].can_extents = true; +#else + h->files[i].can_extents = false; +#endif } h->size = offset; nbdkit_debug ("total size=%" PRIu64, h->size); @@ -319,6 +341,104 @@ split_cache (void *handle, uint32_t count, uint64_t offset, uint32_t flags) } #endif /* HAVE_POSIX_FADVISE */ +#ifdef SEEK_HOLE +static int64_t +do_extents (struct file *file, uint32_t count, uint64_t offset, + bool req_one, struct nbdkit_extents *extents) +{ + int64_t r = 0; + uint64_t end =...

I'm still working my way through the filters before this series will be complete, but this is enough of a start to at least get some feedback on the idea of implementing another NBD protocol extension. Eric Blake (9): server: Internal hooks for implementing NBD_CMD_CACHE plugins: Add .cache callback file, split: Implement .cache with posix_fadvise nbd: Implement NBD_CMD_CACHE

Since v1: - rework .can_cache to be tri-state, with default of no advertisement (ripple effect through other patches) - add a lot more patches in order to round out filter support And in the meantime, Rich pushed NBD_CMD_CACHE support into libnbd, so in theory we now have a way to test cache commands through the entire stack. Eric Blake (24): server: Internal hooks for implementing