Hi all, This patch revists the effort that Chris Argus made last year to port kpatch-style "load hooks" to livepatch:
https://lkml.org/lkml/2016/8/26/434 Since that discussion, the consistency model has been merged. This patch locates the hooks in a slightly different place, providing callbacks to a livepatch module whenever a klp_object is being patched or unpatched. A pointer to the current klp_object undergoing (un)patching is also passed to the hook callback -- with that in hand, the hook implementation can make decisions based on the current module state (live, coming, going). A new Documentation/ file is provided as well as a contrived sample module and livepatch demo to demonstrate the callbacks. The example is about as simple as possible, but could be further embellished to resemble a real-world livepatch fix if desired. Thanks, Joe Lawrence (1): livepatch: add (un)patch hooks Documentation/livepatch/hooks.txt | 98 +++++++++++++++++++++++++ include/linux/livepatch.h | 32 ++++++++ kernel/livepatch/core.c | 5 -- kernel/livepatch/patch.c | 35 +++++++++ samples/livepatch/Makefile | 2 + samples/livepatch/livepatch-hooks-demo.c | 122 +++++++++++++++++++++++++++++++ samples/livepatch/livepatch-hooks-mod.c | 38 ++++++++++ 7 files changed, 327 insertions(+), 5 deletions(-) create mode 100644 Documentation/livepatch/hooks.txt create mode 100644 samples/livepatch/livepatch-hooks-demo.c create mode 100644 samples/livepatch/livepatch-hooks-mod.c -- 1.8.3.1
