Method fallocate

fs/cache/persistent_cache/persistent_cache.cpp:283–298

}

int PersistentCacheFile::fallocate(int mode, off_t offset, off_t len) {
    if (m_local_file == nullptr) {
        LOG_WARN("local path or size not set, ignore");
        return 0;
    }
    if (len == -1) {
        len = m_size - offset;
    }
    range_split_power2 rs(offset, len, m_fs->block_size);
    auto aligned_offset = rs.aligned_begin_offset();
    auto aligned_len = rs.aligned_length();
    LOG_DEBUG("fallocate offset: `, len: `, aligned offset: `, aligned len: `", offset, len,
              aligned_offset, aligned_len);

    return m_local_file->trim(aligned_offset, aligned_len);
}

std::pair<off_t, size_t> PersistentCacheStore::query_refill_range(off_t offset, size_t size) {
    off_t align_left = align_down(offset, m_fs->block_size);