Release 0.8.7

This release includes a bunch of important bugfixes for erasure-coded setups
with disabled immediate_commit. After these fixes, "test_heal" OSD killing test
now passes fine with EC:

- Fix cluster write stalls with "Error while doing flush on OSD xx: -16 (Device or resource busy)"
  in OSD logs possible in EC setups with disabled immediate_commit by selectively
  syncing nonsynced objects on STABILIZE/ROLLBACK (https://github.com/vitalif/vitastor/issues/51)
- Fix other EC + disabled immediate_commit problems:
  - Fix "opcode=5 retval=-2" errors happening on SYNC retries
  - Fix non-working "pagination" during PG dirty object flushing
  - Fix write operations not continued correctly after dirty object flushing
- Fix incorrect parity read-modify-write calculation when writing into a lost chunk
- Fix OSDs losing left_on_dead PG state of non-clean PGs and thus not removing junk data in the cluster
- Fix a small memory leak caused by bad indexing of EC recovery matrices
- Fix a rare use-after-free in cluster_client caused by a reenterability issue
- Fix vitastor-cli create command syntax in the CSI driver
- Allow to start OSDs without local store for tests
- Fix memory allocation error in disk_tool_meta for non-standard metadata block sizes
- Fix delete operations received before loading pool metadata crashing OSDs with "null pointer exception"
- Improve "theoretical performance" Russian documentation

New features:

- Implement online configuration update for some parameters. Documentation is coming soon :)

src/CMakeLists.txt

@@ -16,7 +16,7 @@ if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
 	set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 endif()
 
-add_definitions(-DVERSION="0.8.6")
+add_definitions(-DVERSION="0.8.7")
 add_definitions(-Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fdiagnostics-color=always -I ${CMAKE_SOURCE_DIR}/src)
 if (${WITH_ASAN})
 	add_definitions(-fsanitize=address -fno-omit-frame-pointer)

src/vitastor.pc.in

@@ -6,7 +6,7 @@ includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
 
 Name: Vitastor
 Description: Vitastor client library
-Version: 0.8.6
+Version: 0.8.7
 Libs: -L${libdir} -lvitastor_client
 Cflags: -I${includedir}