Modify Extent similar to Blob, so that one can use improved Blob printing
when printing extents.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Now printing Blob can include buffers.
There are 2 variants:
- 'buf' same as original in dump_onode
- 'sbuf' only fundamental params, no ptr etc.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Added nice replacement for dump_onode function.
Introduce printer class that allows to select parts of Onode that are to be printed.
It severly reduced amount of clutter in output.
Usage:
using P = Bluestore::printer;
dout << blob->print(P::ptr + P::sdisk + P::schk + P::buf + P::attrs);

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

- moved operator<< to BlueStore_debug file
- upcased Printer {} flags
- more reliable heap begin detection
- fixup after rebase

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Small improvement on debug output.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Give Estimator proper logic.
It now learns expected recompression values,
and uses them in next iterations to predict.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Make one estimator per collection.
It makes possible for estimator to learn in collection specific compressibility.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

This is borrowed from ceph#57631;
selective cherry-picked from commit:
    os/bluestore: implement data reformatting on reads
    Signed-off-by: Garry Drankovich <garry.drankovich@clyso.com>
Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

In write_v2_compressed use compressor already selected in
choose_write_options.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Make Collection create Estimator on first use.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Added missing files to alienstore CMake list.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Tests that use original write path specific knowledge are failing now.
For such tests, force conf/bluestore_write_v2=false.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Add admin socket commands:
1) bluestore collections
Lists collections.
2) bluestore list <coll> [start object] [max count]
Lists collection coll starting from object (optional). Default 100 entries. 0 = unlimited.
3) bluestore onode metadata <object>
Prints onode metadata as seen by BlueStore.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

It might happen (usually in tests) that 2 BlueStore instances are
created at the same time.
Since admin commands are unique, it fails to register.
Use first register to detect whether we can register at all.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Add new admin socket command to inspect Estimator stats per collection.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Changed arguments. Passing Onode makes more sense, as logically we scan
specific object. And we can dout onode.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

General code cleanup around _do_write_v2_compressed.
Changed Estimator::reset to Estimator::cleanup.
Now estimator cleans up after work, not before next task.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Improve quality of douts.
Simplify expand_left an expand_right.
Rename functions.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Using fmt::format requires libfmt for linking

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

BufferSpace blob->onode.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Created ch = CollectionHandle was not reset, causing valgrind & other
problems.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Test uses write_v1 triggers for deferred operation.
Falling back to write_v1 in these tests.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Logic of _schedule_io got changed in write path v2.
This is adaptation to it.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Empty line.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>