Merge branch 'introduce bpf_find_vma'

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Song Liu says:

====================

Changes v4 => v5:
1. Clean up and style change in 2/2. (Andrii)

Changes v3 => v4:
1. Move mmap_unlock_work to task_iter.c to fix build for .config without
   !CONFIG_PERF_EVENTS. (kernel test robot <lkp@intel.com>)

Changes v2 => v3:
1. Avoid using x86 only function in selftests. (Yonghong)
2. Add struct file and struct vm_area_struct to btf_task_struct_ids, and
   use it in bpf_find_vma and stackmap.c. (Yonghong)
3. Fix inaccurate comments. (Yonghong)

Changes v1 => v2:
1. Share irq_work with stackmap.c. (Daniel)
2. Add tests for illegal writes to task/vma from the callback function.
   (Daniel)
3. Other small fixes.

Add helper bpf_find_vma. This can be used in some profiling use cases. It
might also be useful for LSM.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Alexei Starovoitov 2021-11-07 11:54:51 -08:00

parent 5fd79ed9be f108662b27

commit 0cc78dcca3

13 changed files with 466 additions and 81 deletions

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1

include/linux/bpf.h

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20

include/uapi/linux/bpf.h

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5

kernel/bpf/btf.c

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65

kernel/bpf/mmap_unlock_work.h

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80

kernel/bpf/stackmap.c

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76

kernel/bpf/task_iter.c

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34

kernel/bpf/verifier.c

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2

kernel/trace/bpf_trace.c

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20

tools/include/uapi/linux/bpf.h

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117

tools/testing/selftests/bpf/prog_tests/find_vma.c

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69

tools/testing/selftests/bpf/progs/find_vma.c

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29

tools/testing/selftests/bpf/progs/find_vma_fail1.c

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29

tools/testing/selftests/bpf/progs/find_vma_fail2.c

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