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From: Petr Mladek <pmladek@suse.com>
To: Jiri Kosina <jikos@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Miroslav Benes <mbenes@suse.cz>
Cc: Joe Lawrence <joe.lawrence@redhat.com>,
	Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
	Nicolai Stange <nstange@suse.de>,
	live-patching@vger.kernel.org, linux-kernel@vger.kernel.org,
	Petr Mladek <pmladek@suse.com>
Subject: [PATCH v2 0/5] livepatch: new API to track system state changes
Date: Fri, 19 Jul 2019 09:40:29 +0200
Message-ID: <20190719074034.29761-1-pmladek@suse.com> (raw)

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 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                        | 122 +++++++++++++++
 kernel/livepatch/state.h                        |   9 ++
 kernel/livepatch/transition.c                   |  12 +-
 lib/livepatch/Makefile                          |   5 +-
 lib/livepatch/test_klp_state.c                  | 161 ++++++++++++++++++++
 lib/livepatch/test_klp_state2.c                 | 190 ++++++++++++++++++++++++
 lib/livepatch/test_klp_state3.c                 |   5 +
 tools/testing/selftests/livepatch/Makefile      |   3 +-
 tools/testing/selftests/livepatch/test-state.sh | 180 ++++++++++++++++++++++
 15 files changed, 902 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


             reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-19  7:40 Petr Mladek [this message]
2019-07-19  7:40 ` [PATCH v2 1/5] livepatch: Keep replaced patches until post_patch callback is called Petr Mladek
2019-08-13 13:24   ` Miroslav Benes
2019-07-19  7:40 ` [PATCH v2 2/5] livepatch: Basic API to track system state changes Petr Mladek
2019-08-13 13:33   ` Miroslav Benes
2019-07-19  7:40 ` [PATCH v2 3/5] livepatch: Allow to distinguish different version of " Petr Mladek
2019-08-13 13:36   ` Miroslav Benes
2019-07-19  7:40 ` [PATCH v2 4/5] livepatch: Documentation of the new API for tracking " Petr Mladek
2019-08-13 13:43   ` Miroslav Benes
2019-07-19  7:40 ` [PATCH v2 5/5] livepatch: Selftests of the " Petr Mladek
2019-08-13 13:46 ` [PATCH v2 0/5] livepatch: new API to track " Miroslav Benes

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