Method flush_blocks

block/src/qcow/refcount.rs:170–182

Flush the dirty refcount blocks. This must be done before flushing the table that points to the blocks.

(&mut self, raw_file: &mut QcowRawFile)

    /// Flush the dirty refcount blocks. This must be done before flushing the table that points to
    /// the blocks.
    pub fn flush_blocks(&mut self, raw_file: &mut QcowRawFile) -> io::Result<()> {
        // Write out all dirty L2 tables.
        for (table_index, block) in self.refblock_cache.iter_mut().filter(|(_k, v)| v.dirty()) {
            let addr = self.ref_table[*table_index];
            if addr != 0 {
                raw_file.write_refcount_block(addr, block.get_values())?;
            } else {
                return Err(std::io::Error::from_raw_os_error(EINVAL));
            }
            block.mark_clean();
        }
        Ok(())
    }

    /// Flush the refcount table that keeps the address of the refcounts blocks.
    /// Returns true if the table changed since the previous `flush_table()` call.