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author	Kui-Feng Lee <kuifeng@meta.com>
	Thu, 23 Mar 2023 03:24:03 +0000 (20:24 -0700)
committer	Martin KaFai Lau <martin.lau@kernel.org>
	Thu, 23 Mar 2023 05:53:02 +0000 (22:53 -0700)
commit	912dd4b0c2a50a839301520badb241f36664ae07
tree	389be76c86c3de80341b8bf7678b213194c98744	tree
parent	aef56f2e918bf8fc8de25f0b36e8c2aba44116ec	commit \| diff

libbpf: Update a bpf_link with another struct_ops.

Introduce bpf_link__update_map(), which allows to atomically update
underlying struct_ops implementation for given struct_ops BPF link.

Also add old_map_fd to struct bpf_link_update_opts to handle
BPF_F_REPLACE feature.

Signed-off-by: Kui-Feng Lee <kuifeng@meta.com>
Link: https://lore.kernel.org/r/20230323032405.3735486-7-kuifeng@meta.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

tools/lib/bpf/bpf.c		diff \| blob \| blame \| history
tools/lib/bpf/bpf.h		diff \| blob \| blame \| history
tools/lib/bpf/libbpf.c		diff \| blob \| blame \| history
tools/lib/bpf/libbpf.h		diff \| blob \| blame \| history
tools/lib/bpf/libbpf.map		diff \| blob \| blame \| history

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