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| author | Dave Marchevsky <davemarchevsky@fb.com> | 2023-10-13 23:44:25 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2023-10-14 01:48:58 +0300 |
| commit | e0e1a7a5fc377d54bd792c6368a375d41fc316ef (patch) | |
| tree | f8e5d4265acfb8d1a0d074ca8188cbd8e86c4105 /tools/testing/selftests/bpf/bpf_experimental.h | |
| parent | 4ac4546821584736798aaa9e97da9f6eaf689ea3 (diff) | |
| download | linux-e0e1a7a5fc377d54bd792c6368a375d41fc316ef.tar.xz | |
selftests/bpf: Add tests for open-coded task_vma iter
The open-coded task_vma iter added earlier in this series allows for
natural iteration over a task's vmas using existing open-coded iter
infrastructure, specifically bpf_for_each.
This patch adds a test demonstrating this pattern and validating
correctness. The vma->vm_start and vma->vm_end addresses of the first
1000 vmas are recorded and compared to /proc/PID/maps output. As
expected, both see the same vmas and addresses - with the exception of
the [vsyscall] vma - which is explained in a comment in the prog_tests
program.
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20231013204426.1074286-5-davemarchevsky@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_experimental.h')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_experimental.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h index 9aa29564bd74..2c8cb3f61529 100644 --- a/tools/testing/selftests/bpf/bpf_experimental.h +++ b/tools/testing/selftests/bpf/bpf_experimental.h @@ -159,6 +159,14 @@ extern void *bpf_percpu_obj_new_impl(__u64 local_type_id, void *meta) __ksym; */ extern void bpf_percpu_obj_drop_impl(void *kptr, void *meta) __ksym; +struct bpf_iter_task_vma; + +extern int bpf_iter_task_vma_new(struct bpf_iter_task_vma *it, + struct task_struct *task, + unsigned long addr) __ksym; +extern struct vm_area_struct *bpf_iter_task_vma_next(struct bpf_iter_task_vma *it) __ksym; +extern void bpf_iter_task_vma_destroy(struct bpf_iter_task_vma *it) __ksym; + /* Convenience macro to wrap over bpf_obj_drop_impl */ #define bpf_percpu_obj_drop(kptr) bpf_percpu_obj_drop_impl(kptr, NULL) |