- Move error messages to stderr (fixes unwritable_output_file,
input_file_not_found, and missing_input_option)
- Validate XML structures implicitly (fixes corrupted_input_data)
- Check output file size (fixes tiny_output_file)
- Allow restoring XML without the hints (for creating test fixtures)
- Provide XML error context
- Remove unused option
While rebuilding a superblock, the transaction_id, data_block_size, and
nr_data_blocks could be inherited from the current superblock if available
(assumed it's a multiple-activated copy, so supposed partially valid),
or derived from the probed data mappings and device details, that saves
the hassle of manual input.
Note that either the current superblock or user-overrides must be compatible
with the probed values, thus the filters are applied.
- Fix the references for sorting. The timestamp statistics is stored
in node_info corresponding to the second element.
- Fix the timestamp comparison routine. The mapping root with more recent
blocks should have higher priority.
A pre-built node could be under populated (less than half-full) due to
following reasons:
- A single shared leaf generated by dm-thin key removal. The residency
could drop below 50%, until it reaches the merge threshold (33% or 44%,
depends on its context).
- A shared root, which could have any possible nr_entries.
- Underfull shared nodes (less than 33% residency) caused by kernel issues.
To avoid producing under populated nodes, those kinds of pre-built nodes,
except the roots, will be merged into their siblings.
The ref counts now are handled in a straightforward method:
The pre-built subtrees serve as snapshots of potentially shared nodes.
They hold an initial ref count on the pre-built nodes and their children.
The temporary ref counts are later dropped at the end of device building.
This way fixes the ref counts of unshifted nodes, thus the 'reserve'
operation introduced by commit 6d16c58 is reverted.
- Do not use shared internals as Defs
- Build Defs with common leaf sequences only, that could forms
more common Defs between partially shared subtrees.
To deal with variety in target attributes and their expected outputs,
the test parameters are categorized into traits, thus the test program
could define test parameters in a more structured way, without having
to pass multiple tightly-coupled parameters to test functions.
