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Merge pull request #557 from jpoimboe/deprecate-replace

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kpatch: deprecate the replace command
This commit is contained in:
Seth Jennings 2015-11-16 09:48:55 -06:00
commit c4967bc02b
3 changed files with 4 additions and 24 deletions
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8
README.md
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@ -535,10 +535,10 @@ and restore the function to its original state.
**Q. Can you apply multiple patches?** **Q. Can you apply multiple patches?**
Yes, but to prevent any unexpected interactions between multiple patch modules, Yes, but to prevent any unexpected interactions between multiple patch modules,
it's recommended that you only have a single patch loaded at any given time. it's recommended that patch upgrades are cumulative, so that each patch is a
This can be achieved by combining the new patch with the previous patch using superset of the previous patch. This can be achieved by combining the new
`combinediff` before running `kpatch-build`. You can then the `kpatch replace` patch with the previous patch using `combinediff` before running
command to atomically replace the old patch module with the new cumulative one. `kpatch-build`.
**Q. Why did kpatch-build detect a changed function that wasn't touched by the **Q. Why did kpatch-build detect a changed function that wasn't touched by the
source patch?** source patch?**

17
kpatch/kpatch
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@ -42,7 +42,6 @@ usage () {
echo >&2 echo >&2
usage_cmd "load --all" "load all installed patch modules into the running kernel" usage_cmd "load --all" "load all installed patch modules into the running kernel"
usage_cmd "load <module>" "load patch module into the running kernel" usage_cmd "load <module>" "load patch module into the running kernel"
usage_cmd "replace <module>" "load patch module into the running kernel, replacing all other modules"
usage_cmd "unload --all" "unload all patch modules from the running kernel" usage_cmd "unload --all" "unload all patch modules from the running kernel"
usage_cmd "unload <module>" "unload patch module from the running kernel" usage_cmd "unload <module>" "unload patch module from the running kernel"
echo >&2 echo >&2
@ -183,14 +182,6 @@ unload_module () {
rmmod $PATCH 2> /dev/null || return 0 rmmod $PATCH 2> /dev/null || return 0
} }
unload_disabled_modules() {
for module in /sys/kernel/kpatch/patches/*; do
if [[ $(cat $module/enabled) -eq 0 ]]; then
unload_module $(basename $module) || die "failed to unload $module"
fi
done
}
get_module_version() { get_module_version() {
MODVER=$(modinfo -F vermagic "$1") || return 1 MODVER=$(modinfo -F vermagic "$1") || return 1
MODVER=${MODVER/ */} MODVER=${MODVER/ */}
@ -216,14 +207,6 @@ case "$1" in
esac esac
;; ;;
"replace")
[[ "$#" -ne 2 ]] && usage
PATCH="$2"
find_module "$PATCH" || die "can't find $PATCH"
load_module "$MODULE" replace=1 || die "failed to load module $PATCH"
unload_disabled_modules || die "failed to unload old modules"
;;
"unload") "unload")
[[ "$#" -ne 2 ]] && usage [[ "$#" -ne 2 ]] && usage
case "$2" in case "$2" in

3
man/kpatch.1
View File

@ -23,9 +23,6 @@ load --all
load <module> load <module>
load patch module into the running kernel load patch module into the running kernel
replace <module>
load patch module into the running kernel, replacing all other modules
unload --all unload --all
unload all patch modules from the running kernel unload all patch modules from the running kernel