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klp-build: Validate short-circuit prerequisites

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The --short-circuit option implicitly requires that certain directories
are already in klp-tmp.  Enforce that to prevent confusing errors.

Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Josh Poimboeuf 2026-04-17 13:33:55 -07:00
parent 3b8e56b86f
commit 225d16dd51
1 changed files with 18 additions and 0 deletions
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18
scripts/livepatch/klp-build
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@ -437,6 +437,20 @@ do_init() {
# builds in pwd.
[[ ! "$PWD" -ef "$SCRIPT_DIR/../.." ]] && die "please run from the kernel root directory"
if (( SHORT_CIRCUIT >= 2 )); then
[[ -f "$ORIG_DIR/.complete" ]] || die "-S $SHORT_CIRCUIT requires completed $ORIG_DIR"
fi
if (( SHORT_CIRCUIT >= 3 )); then
[[ -f "$PATCHED_DIR/.complete" ]] || die "-S $SHORT_CIRCUIT requires completed $PATCHED_DIR"
fi
if (( SHORT_CIRCUIT >= 4 )); then
[[ -f "$ORIG_CSUM_DIR/.complete" ]] || die "-S $SHORT_CIRCUIT requires completed $ORIG_CSUM_DIR"
[[ -f "$PATCHED_CSUM_DIR/.complete" ]] || die "-S $SHORT_CIRCUIT requires completed $PATCHED_CSUM_DIR"
fi
if (( SHORT_CIRCUIT >= 5 )); then
[[ -f "$DIFF_DIR/.complete" ]] || die "-S $SHORT_CIRCUIT requires completed $DIFF_DIR"
fi
(( SHORT_CIRCUIT <= 1 )) && rm -rf "$TMP_DIR"
mkdir -p "$TMP_DIR"
@ -593,6 +607,7 @@ copy_orig_objects() {
mv -f "$TMP_DIR/build.log" "$ORIG_DIR"
touch "$TIMESTAMP"
touch "$ORIG_DIR/.complete"
}
# Copy all changed objects to $PATCHED_DIR
@ -631,6 +646,7 @@ copy_patched_objects() {
(( found == 0 )) && die "no changes detected"
mv -f "$TMP_DIR/build.log" "$PATCHED_DIR"
touch "$PATCHED_DIR/.complete"
}
# Copy .o files to a separate directory and run "objtool klp checksum" on each
@ -712,6 +728,8 @@ diff_objects() {
die "objtool klp diff failed"
)
done
touch "$DIFF_DIR/.complete"
}
# For each changed object, run "objtool klp checksum" with --debug-checksum to