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kpatch: allow kpatch load/unload/info for files 

A user may want to load a module without having to install it to the
initrd.  In fact, 99% of the time I think that will be the typical usage
of "kpatch load", with a given file as an argument rather than a DB
module.

Have "kpatch load" and other commands take a file as input.  If the file
is not found, then check the DB.
This commit is contained in:
Josh Poimboeuf 2014-04-02 08:51:30 -05:00
parent 27980527cd
commit 44c4ecd3ff
2 changed files with 20 additions and 18 deletions
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20
kpatch/kpatch
View File

@ -31,15 +31,14 @@ usage () {
echo "usage: kpatch <command> [<args>]" >&2 echo "usage: kpatch <command> [<args>]" >&2
echo >&2 echo >&2
echo "Valid commands:" >&2 echo "Valid commands:" >&2
printf ' %-20s %s\n' "install <file>" "install patch module to the kpatch DB" >&2 printf ' %-20s %s\n' "install <module>" "install patch module to the initrd to be loaded at boot" >&2
printf ' %-20s %s\n' "uninstall <patch>" "uninstall patch module from the kpatch DB" >&2 printf ' %-20s %s\n' "uninstall <module>" "uninstall patch module from the initrd" >&2
echo >&2 echo >&2
printf ' %-20s %s\n' "load --all" "load all installed patch modules into the running kernel" >&2 printf ' %-20s %s\n' "load --all" "load all installed patch modules into the running kernel" >&2
printf ' %-20s %s\n' "load <patch>" "load installed patch module into the running kernel" >&2 printf ' %-20s %s\n' "load <module>" "load patch module into the running kernel" >&2
printf ' %-20s %s\n' "unload <patch>" "unload patch module from the running kernel" >&2 printf ' %-20s %s\n' "unload <module>" "unload patch module from the running kernel" >&2
echo >&2 echo >&2
echo >&2 printf ' %-20s %s\n' "info <module>" "show information about a patch module" >&2
printf ' %-20s %s\n' "info <patch>" "show information about an installed patch module" >&2
echo >&2 echo >&2
printf ' %-20s %s\n' "list" "list installed patch modules" >&2 printf ' %-20s %s\n' "list" "list installed patch modules" >&2
exit 1 exit 1
@ -55,6 +54,9 @@ die() {
} }
__find_module () { __find_module () {
MODULE="$1"
[[ -f "$MODULE" ]] && return
MODULE="$USERDIR/$1" MODULE="$USERDIR/$1"
[[ -f "$MODULE" ]] && return [[ -f "$MODULE" ]] && return
@ -121,7 +123,7 @@ case "$1" in
;; ;;
*) *)
PATCH="$2" PATCH="$2"
find_module "$PATCH" || die "$PATCH is not installed" find_module "$PATCH" || die "can't find $PATCH"
load_module "$MODULE" || die "failed to load patch $PATCH" load_module "$MODULE" || die "failed to load patch $PATCH"
;; ;;
esac esac
@ -130,7 +132,7 @@ case "$1" in
"unload") "unload")
[[ "$#" -ne 2 ]] && usage [[ "$#" -ne 2 ]] && usage
PATCH="$2" PATCH="$2"
find_module "$PATCH" || die "$PATCH is not installed" find_module "$PATCH" || die "can't find $PATCH"
unload_module "$MODULE" || die "failed to unload patch $PATCH" unload_module "$MODULE" || die "failed to unload patch $PATCH"
;; ;;
@ -179,7 +181,7 @@ case "$1" in
"info") "info")
[[ "$#" -ne 2 ]] && usage [[ "$#" -ne 2 ]] && usage
PATCH="$2" PATCH="$2"
find_module "$PATCH" || die "$PATCH is not installed" find_module "$PATCH" || die "can't find $PATCH"
echo "Patch information for $PATCH:" echo "Patch information for $PATCH:"
/usr/sbin/modinfo "$MODULE" || die "failed to get info for patch $PATCH" /usr/sbin/modinfo "$MODULE" || die "failed to get info for patch $PATCH"
;; ;;

18
man/kpatch.1
View File

@ -11,23 +11,23 @@ displaying information about kernel patch modules installed on
the system. the system.
.SH OPTIONS .SH OPTIONS
install <file> install <module>
install patch module to the kpatch DB install patch module to the initrd to be loaded at boot
uninstall <patch> uninstall <module>
uninstall patch module from the kpatch DB uninstall patch module from the initrd
load --all load --all
load all installed patch modules into the running kernel load all installed patch modules into the running kernel
load <patch> load <module>
load installed patch module into the running kernel load patch module into the running kernel
unload <patch> unload <module>
unload patch module from the running kernel unload patch module from the running kernel
info <patch> info <module>
show information about an installed patch module show information about a patch module
list list
list installed patch modules list installed patch modules