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selftests/bpf: Tolerate missing files during install

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With partial builds, some TEST_GEN_FILES entries can be absent at install
time. rsync treats missing source arguments as fatal and aborts kselftest
installation.

Override INSTALL_SINGLE_RULE in selftests/bpf to use --ignore-missing-args,
while keeping the existing bpf-specific INSTALL_RULE extension logic. Also
add --ignore-missing-args to the TEST_INST_SUBDIRS rsync loop so that
subdirectories with no .bpf.o files (e.g. when a test runner flavor was
skipped) do not abort installation.

Note that the INSTALL_SINGLE_RULE override applies globally to all file
categories including static source files (TEST_PROGS, TEST_FILES). These
are version-controlled and should always be present, so the practical risk
is negligible.

Signed-off-by: Ricardo B. Marlière <rbm@suse.com>
Link: https://lore.kernel.org/r/20260602-selftests-bpf_misconfig-v12-11-27f898b3ba26@suse.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Ricardo B. Marlière 2026-06-02 10:03:00 -03:00 committed by Alexei Starovoitov
parent b85e63cb65
commit 3ca6543464
1 changed files with 14 additions and 3 deletions
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17
tools/testing/selftests/bpf/Makefile
View File

@ -1029,12 +1029,23 @@ EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) \
# Delete partially updated (corrupted) files on error
.DELETE_ON_ERROR:
# When permissive, tell rsync to ignore missing source arguments so that
# partial builds do not abort installation.
ifneq ($(PERMISSIVE),)
override define INSTALL_SINGLE_RULE
$(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH))
$(if $(INSTALL_LIST),rsync -a --copy-unsafe-links --ignore-missing-args $(INSTALL_LIST) $(INSTALL_PATH)/)
endef
endif
DEFAULT_INSTALL_RULE := $(INSTALL_RULE)
override define INSTALL_RULE
$(DEFAULT_INSTALL_RULE)
@for DIR in $(TEST_INST_SUBDIRS); do \
mkdir -p $(INSTALL_PATH)/$$DIR; \
rsync -a $(OUTPUT)/$$DIR/*.bpf.o $(INSTALL_PATH)/$$DIR;\
@for DIR in $(TEST_INST_SUBDIRS); do \
mkdir -p $(INSTALL_PATH)/$$DIR; \
rsync -a $(if $(PERMISSIVE),--ignore-missing-args) \
$(OUTPUT)/$$DIR/*.bpf.o \
$(INSTALL_PATH)/$$DIR; \
done
endef