Context |
Check |
Description |
bpf/vmtest-bpf-next-PR |
success
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PR summary
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netdev/series_format |
success
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Single patches do not need cover letters
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netdev/tree_selection |
success
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Clearly marked for bpf-next
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netdev/ynl |
success
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Generated files up to date;
no warnings/errors;
no diff in generated;
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netdev/fixes_present |
success
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Fixes tag not required for -next series
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netdev/header_inline |
success
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No static functions without inline keyword in header files
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netdev/build_32bit |
success
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Errors and warnings before: 8 this patch: 8
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netdev/build_tools |
success
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Errors and warnings before: 1 this patch: 1
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netdev/cc_maintainers |
fail
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1 blamed authors not CCed: martin.lau@linux.dev; 11 maintainers not CCed: kpsingh@kernel.org john.fastabend@gmail.com shuah@kernel.org jolsa@kernel.org song@kernel.org yonghong.song@linux.dev linux-kselftest@vger.kernel.org martin.lau@linux.dev mykolal@fb.com haoluo@google.com sdf@google.com
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netdev/build_clang |
success
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Errors and warnings before: 8 this patch: 8
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netdev/verify_signedoff |
success
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Signed-off-by tag matches author and committer
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netdev/deprecated_api |
success
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None detected
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netdev/check_selftest |
success
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No net selftest shell script
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netdev/verify_fixes |
success
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Fixes tag looks correct
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netdev/build_allmodconfig_warn |
success
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Errors and warnings before: 8 this patch: 8
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netdev/checkpatch |
warning
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WARNING: line length of 90 exceeds 80 columns
WARNING: line length of 94 exceeds 80 columns
WARNING: line length of 95 exceeds 80 columns
WARNING: line length of 96 exceeds 80 columns
WARNING: line length of 97 exceeds 80 columns
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netdev/build_clang_rust |
success
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No Rust files in patch. Skipping build
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netdev/kdoc |
success
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Errors and warnings before: 0 this patch: 0
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netdev/source_inline |
success
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Was 0 now: 0
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bpf/vmtest-bpf-next-VM_Test-2 |
success
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Logs for Unittests
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bpf/vmtest-bpf-next-VM_Test-0 |
success
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Logs for Lint
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bpf/vmtest-bpf-next-VM_Test-1 |
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Logs for ShellCheck
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bpf/vmtest-bpf-next-VM_Test-5 |
success
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Logs for aarch64-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-3 |
success
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Logs for Validate matrix.py
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bpf/vmtest-bpf-next-VM_Test-34 |
success
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Logs for x86_64-llvm-17 / veristat
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bpf/vmtest-bpf-next-VM_Test-42 |
success
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Logs for x86_64-llvm-18 / veristat
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bpf/vmtest-bpf-next-VM_Test-9 |
success
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Logs for aarch64-gcc / test (test_verifier, false, 360) / test_verifier on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-29 |
success
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Logs for x86_64-llvm-17 / build-release / build for x86_64 with llvm-17 and -O2 optimization
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bpf/vmtest-bpf-next-VM_Test-11 |
success
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Logs for s390x-gcc / build / build for s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-12 |
success
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Logs for s390x-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-10 |
success
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Logs for aarch64-gcc / veristat
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bpf/vmtest-bpf-next-VM_Test-4 |
success
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Logs for aarch64-gcc / build / build for aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-17 |
success
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Logs for s390x-gcc / veristat
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bpf/vmtest-bpf-next-VM_Test-28 |
success
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Logs for x86_64-llvm-17 / build / build for x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-20 |
success
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Logs for x86_64-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-19 |
success
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Logs for x86_64-gcc / build / build for x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-35 |
success
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Logs for x86_64-llvm-18 / build / build for x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-36 |
success
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Logs for x86_64-llvm-18 / build-release / build for x86_64 with llvm-18 and -O2 optimization
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bpf/vmtest-bpf-next-VM_Test-16 |
success
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Logs for s390x-gcc / test (test_verifier, false, 360) / test_verifier on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-18 |
success
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Logs for set-matrix
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bpf/vmtest-bpf-next-VM_Test-13 |
success
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Logs for s390x-gcc / test (test_maps, false, 360) / test_maps on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-27 |
success
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Logs for x86_64-gcc / veristat / veristat on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-15 |
success
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Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-22 |
success
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Logs for x86_64-gcc / test (test_progs, false, 360) / test_progs on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-30 |
success
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Logs for x86_64-llvm-17 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-39 |
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Logs for x86_64-llvm-18 / test (test_progs_cpuv4, false, 360) / test_progs_cpuv4 on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-23 |
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Logs for x86_64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-8 |
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Logs for aarch64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-14 |
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bpf/vmtest-bpf-next-VM_Test-7 |
success
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Logs for aarch64-gcc / test (test_progs, false, 360) / test_progs on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-38 |
success
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Logs for x86_64-llvm-18 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-25 |
success
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Logs for x86_64-gcc / test (test_progs_parallel, true, 30) / test_progs_parallel on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-37 |
success
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Logs for x86_64-llvm-18 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-21 |
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Logs for x86_64-gcc / test (test_maps, false, 360) / test_maps on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-33 |
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Logs for x86_64-llvm-17 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-6 |
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bpf/vmtest-bpf-next-VM_Test-26 |
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Logs for x86_64-gcc / test (test_verifier, false, 360) / test_verifier on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-24 |
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bpf/vmtest-bpf-next-VM_Test-31 |
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bpf/vmtest-bpf-next-VM_Test-41 |
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bpf/vmtest-bpf-next-VM_Test-32 |
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Logs for x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-40 |
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Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18
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@@ -1128,6 +1128,7 @@ static int bpf_map__init_kern_struct_ops(struct bpf_map *map)
const struct btf_type *mtype, *kern_mtype;
__u32 mtype_id, kern_mtype_id;
void *mdata, *kern_mdata;
+ struct bpf_program *prog;
__s64 msize, kern_msize;
__u32 moff, kern_moff;
__u32 kern_member_idx;
@@ -1145,19 +1146,35 @@ static int bpf_map__init_kern_struct_ops(struct bpf_map *map)
kern_member = find_member_by_name(kern_btf, kern_type, mname);
if (!kern_member) {
- /* Skip all zeros or null fields if they are not
- * presented in the kernel BTF.
- */
- if (libbpf_is_mem_zeroed(mdata, msize)) {
- st_ops->progs[i] = NULL;
- pr_info("struct_ops %s: member %s not found in kernel, skipping it as it's set to zero\n",
+ if (!libbpf_is_mem_zeroed(mdata, msize)) {
+ pr_warn("struct_ops init_kern %s: Cannot find member %s in kernel BTF\n",
map->name, mname);
- continue;
+ return -ENOTSUP;
}
- pr_warn("struct_ops init_kern %s: Cannot find member %s in kernel BTF\n",
+ prog = st_ops->progs[i];
+ if (prog) {
+ /* If we had declaratively set struct_ops callback, we need to
+ * first validate that it's actually a struct_ops program.
+ * And then force its autoload to false, because it doesn't have
+ * a chance of succeeding from POV of the current struct_ops map.
+ * If this program is still referenced somewhere else, though,
+ * then bpf_object_adjust_struct_ops_autoload() will update its
+ * autoload accordingly.
+ */
+ if (!is_valid_st_ops_program(obj, prog)) {
+ pr_warn("struct_ops init_kern %s: member %s is declaratively assigned a non-struct_ops program\n",
+ map->name, mname);
+ return -EINVAL;
+ }
+ prog->autoload = false;
+ st_ops->progs[i] = NULL;
+ }
+
+ /* Skip all-zero/NULL fields if they are not present in the kernel BTF */
+ pr_info("struct_ops %s: member %s not found in kernel, skipping it as it's set to zero\n",
map->name, mname);
- return -ENOTSUP;
+ continue;
}
kern_member_idx = kern_member - btf_members(kern_type);
@@ -1183,8 +1200,6 @@ static int bpf_map__init_kern_struct_ops(struct bpf_map *map)
}
if (btf_is_ptr(mtype)) {
- struct bpf_program *prog;
-
/* Update the value from the shadow type */
prog = *(void **)mdata;
st_ops->progs[i] = prog;
@@ -63,7 +63,7 @@ struct bpf_testmod_ops___zeroed {
int zeroed;
};
-SEC("?struct_ops/test_3")
+SEC("struct_ops/test_3")
int BPF_PROG(zeroed_op)
{
return 1;
Previous attempt to fix the handling of nulled-out (from skeleton) struct_ops program is working well only if struct_ops program is defined as non-autoloaded by default (i.e., has SEC("?struct_ops") annotation, with question mark). Unfortunately, that fix is incomplete due to how bpf_object_adjust_struct_ops_autoload() is marking referenced or non-referenced struct_ops program as autoloaded (or not). Because bpf_object_adjust_struct_ops_autoload() is run after bpf_map__init_kern_struct_ops() step, which sets program slot to NULL, such programs won't be considered "referenced", and so its autoload property won't be changed. This all sounds convoluted and it is, but the desire is to have as natural behavior (as far as struct_ops usage is concerned) as possible. This fix is redoing the original fix but makes it work for autoloaded-by-default struct_ops programs as well. We achieve this by forcing prog->autoload to false if prog was declaratively set for some struct_ops map, but then nulled-out from skeleton (programmatically). This achieves desired effect of not autoloading it. If such program is still referenced somewhere else (different struct_ops map or different callback field), it will get its autoload property adjusted by bpf_object_adjust_struct_ops_autoload() later. We also fix selftest, which accidentally used SEC("?struct_ops") annotation. It was meant to use autoload-by-default program from the very beginning. Fixes: f973fccd43d3 ("libbpf: handle nulled-out program in struct_ops correctly") Cc: Kui-Feng Lee <thinker.li@gmail.com> Cc: Eduard Zingerman <eddyz87@gmail.com> Cc: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> --- tools/lib/bpf/libbpf.c | 37 +++++++++++++------ .../selftests/bpf/progs/struct_ops_module.c | 2 +- 2 files changed, 27 insertions(+), 12 deletions(-)