bpf: handle return value of BPF_PROG_TYPE_STRUCT_OPS prog #1768
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Master branch: 43d2b88 |
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Master branch: 2865ba8 |
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Currently if a function ptr in struct_ops has a return value, its caller will get a random return value from it, because the return value of related BPF_PROG_TYPE_STRUCT_OPS prog is just dropped. So adding a new flag BPF_TRAMP_F_RET_FENTRY_RET to tell bpf trampoline to save and return the return value of struct_ops prog if ret_size of the function ptr is greater than 0. Also restricting the flag to be used alone. Fixes: 85d33df ("bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS") Signed-off-by: Hou Tao <houtao1@huawei.com>
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Master branch: d198b27 |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=546241 irrelevant now. Closing PR. |
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Pull request for series with
subject: bpf: handle return value of BPF_PROG_TYPE_STRUCT_OPS prog
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=546241