emo/thin-provisioning-tools
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[cache_writeback] Support offset within the source and destination devices

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

22
block-cache/copier.cc
View File

@@ -10,12 +10,14 @@ using namespace std;
copier::copier(io_engine &engine,
string const &src, 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)
: pool_(block_size * 512, mem, PAGE_SIZE),
block_size_(block_size),
engine_(engine),
src_handle_(engine_.open_file(src, io_engine::M_READ_ONLY)),
dest_handle_(engine_.open_file(dest, io_engine::M_READ_WRITE)),
src_offset_(src_offset), dest_offset_(dest_offset),
genkey_count_(0)
{
}
@@ -45,8 +47,8 @@ copier::issue(copy_op const &op)
auto r = engine_.issue_io(src_handle_,
io_engine::D_READ,
to_sector(op.src_b),
to_sector(op.src_e),
to_src_sector(op.src_b),
to_src_sector(op.src_e),
data,
key);
@@ -151,8 +153,8 @@ copier::wait_successful(io_engine::wait_result const &p)
j.op.read_complete = true;
if (!engine_.issue_io(dest_handle_,
io_engine::D_WRITE,
to_sector(j.op.dest_b),
to_sector(j.op.dest_b + (j.op.src_e - j.op.src_b)),
to_dest_sector(j.op.dest_b),
to_dest_sector(j.op.dest_b + (j.op.src_e - j.op.src_b)),
j.data,
it->first)) {
complete(j);
@@ -177,9 +179,15 @@ copier::complete(copy_job const &j)
}
sector_t
copier::to_sector(block_address b) const
copier::to_src_sector(block_address b) const
{
return b * block_size_;
return src_offset_ + b * block_size_;
}
sector_t
copier::to_dest_sector(block_address b) const
{
return dest_offset_ + b * block_size_;
}
unsigned