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[cache_writeback] Support offset within the source and destination devices

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This commit is contained in:
Ming-Hung Tsai
2021-01-18 01:11:01 +08:00
parent 76ac202463
commit 4c17076f09
4 changed files with 122 additions and 18 deletions
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16
block-cache/copier.h
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@@ -61,13 +61,22 @@ namespace bcache {
public:
copier(io_engine &engine,
std::string const &src, std::string const &dest,
sector_t block_size, size_t mem);
sector_t block_size, size_t mem,
sector_t src_offset, sector_t dest_offset);
~copier();
sector_t get_block_size() const {
return block_size_;
}
sector_t get_src_offset() const {
return src_offset_;
}
sector_t get_dest_offset() const {
return dest_offset_;
}
// Blocks if out of memory.
void issue(copy_op const &op);
@@ -83,7 +92,8 @@ namespace bcache {
void wait_();
void complete(copy_job const &j);
sector_t to_sector(block_address b) const;
sector_t to_src_sector(block_address b) const;
sector_t to_dest_sector(block_address b) const;
unsigned genkey();
mempool pool_;
@@ -91,6 +101,8 @@ namespace bcache {
io_engine &engine_;
io_engine::handle src_handle_;
io_engine::handle dest_handle_;
sector_t src_offset_;
sector_t dest_offset_;
unsigned genkey_count_;
using job_map = std::map<unsigned, copy_job>;