diff mbox series

[bpf-next,v3,01/12] selftests/bpf: Finish folding after BPF_FUNC_csum_diff

Message ID 20230222223714.80671-2-iii@linux.ibm.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: Support 64-bit pointers to kfuncs | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR fail PR summary
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 9 maintainers not CCed: linux-kselftest@vger.kernel.org john.fastabend@gmail.com shuah@kernel.org song@kernel.org martin.lau@linux.dev mykolal@fb.com haoluo@google.com yhs@fb.com kpsingh@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 23 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
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Commit Message

Ilya Leoshkevich Feb. 22, 2023, 10:37 p.m. UTC 
bpf_csum_diff() may return non-folded checksum, and the arm
implementation actually does this. Finish folding in the test prog.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tools/testing/selftests/bpf/verifier/array_access.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/verifier/array_access.c b/tools/testing/selftests/bpf/verifier/array_access.c
index 1b138cd2b187..e570d6a95702 100644
--- a/tools/testing/selftests/bpf/verifier/array_access.c
+++ b/tools/testing/selftests/bpf/verifier/array_access.c
@@ -241,7 +241,7 @@ 
 	BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
 	BPF_LD_MAP_FD(BPF_REG_1, 0),
 	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
+	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 14),
 
 	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
 	BPF_MOV64_IMM(BPF_REG_2, 4),
@@ -250,7 +250,15 @@ 
 	BPF_MOV64_IMM(BPF_REG_5, 0),
 	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
 		     BPF_FUNC_csum_diff),
+	/* csum_partial() is allowed to return both 0xffffffe3 and 0x1ffe2 */
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+	BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 16),
+	BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xffff),
+	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+	BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 16),
 	BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xffff),
+	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
 	BPF_EXIT_INSN(),
 	},
 	.prog_type = BPF_PROG_TYPE_SCHED_CLS,