Messages in this thread | | | From | Petr Mladek <> | Subject | [PATCH v4 0/5] livepatch: new API to track system state changes | Date | Wed, 30 Oct 2019 16:43:08 +0100 |
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Hi,
this is another piece in the puzzle that helps to maintain more livepatches.
Especially pre/post (un)patch callbacks might change a system state. Any newly installed livepatch has to somehow deal with system state modifications done be already installed livepatches.
This patchset provides a simple and generic API that helps to keep and pass information between the livepatches. It is also usable to prevent loading incompatible livepatches.
Changes since v3:
+ selftests compilation error [kbuild test robot] + fix copyright in selftests [Joe] + used macros for the module names in selftests [Joe] + allow zero state version [Josh] + slightly refactor the code for checking state version [Josh] + fix few typos reported by checkpatch.pl [Petr] + added Acks [Joe]
Changes since v2:
+ Typo fixes [Miroslav] + Move the documentation at the end of the list [Miroslav] + Add Miroslav's acks
Changes since v1:
+ Use "unsigned long" instead of "int" for "state.id" [Nicolai] + Use "unsigned int" instead of "int" for "state.version [Petr] + Include "state.h" to avoid warning about non-static func [Miroslav] + Simplify logic in klp_is_state_compatible() [Miroslav] + Document how livepatches should handle the state [Nicolai] + Fix some typos, formulation, module metadata [Joe, Miroslav]
Petr Mladek (5): livepatch: Keep replaced patches until post_patch callback is called livepatch: Basic API to track system state changes livepatch: Allow to distinguish different version of system state changes livepatch: Documentation of the new API for tracking system state changes livepatch: Selftests of the API for tracking system state changes
Documentation/livepatch/index.rst | 1 + Documentation/livepatch/system-state.rst | 167 +++++++++++++++++++++ include/linux/livepatch.h | 17 +++ kernel/livepatch/Makefile | 2 +- kernel/livepatch/core.c | 44 ++++-- kernel/livepatch/core.h | 5 +- kernel/livepatch/state.c | 119 +++++++++++++++ kernel/livepatch/state.h | 9 ++ kernel/livepatch/transition.c | 12 +- lib/livepatch/Makefile | 5 +- lib/livepatch/test_klp_state.c | 162 ++++++++++++++++++++ lib/livepatch/test_klp_state2.c | 191 ++++++++++++++++++++++++ lib/livepatch/test_klp_state3.c | 5 + tools/testing/selftests/livepatch/Makefile | 3 +- tools/testing/selftests/livepatch/test-state.sh | 180 ++++++++++++++++++++++ 15 files changed, 901 insertions(+), 21 deletions(-) create mode 100644 Documentation/livepatch/system-state.rst create mode 100644 kernel/livepatch/state.c create mode 100644 kernel/livepatch/state.h create mode 100644 lib/livepatch/test_klp_state.c create mode 100644 lib/livepatch/test_klp_state2.c create mode 100644 lib/livepatch/test_klp_state3.c create mode 100755 tools/testing/selftests/livepatch/test-state.sh
-- 2.16.4
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