Andrii suggested moving the attach_type into bpf_link, the previous discussion is as follows: https://lore.kernel.org/bpf/CAEf4BzY7TZRjxpCJM-+LYgEqe23YFj5Uv3isb7gat2-HU4OSng@xxxxxxxxxxxxxx patch1 add attach_type in bpf_link, and pass it to bpf_link_init, which will init the attach_type field. patch2-7 remove the attach_type in struct bpf_xx_link, update the info with bpf_link attach_type. There are some functions finally call bpf_link_init but do not have bpf_attr from user or do not need to init attach_type from user like bpf_raw_tracepoint_open, now use prog->expected_attach_type to init attach_type. bpf_struct_ops_map_update_elem bpf_raw_tracepoint_open bpf_struct_ops_test_run Feedback of any kind is welcome, thanks. Tao Chen (7): bpf: Add attach_type in bpf_link bpf: Remove attach_type in bpf_cgroup_link bpf: Remove attach_type in sockmap_link bpf: Remove location field in tcx_link bpf: Remove attach_type in bpf_netns_link bpf: Remove attach_type in bpf_tracing_link netkit: Remove location field in netkit_link drivers/net/netkit.c | 10 ++++----- include/linux/bpf-cgroup.h | 1 - include/linux/bpf.h | 29 ++++++++++++++---------- include/net/tcx.h | 1 - kernel/bpf/bpf_iter.c | 3 ++- kernel/bpf/bpf_struct_ops.c | 5 +++-- kernel/bpf/cgroup.c | 17 +++++++-------- kernel/bpf/net_namespace.c | 10 ++++----- kernel/bpf/syscall.c | 40 ++++++++++++++++++++-------------- kernel/bpf/tcx.c | 16 +++++++------- kernel/bpf/trampoline.c | 10 +++++---- kernel/trace/bpf_trace.c | 4 ++-- net/bpf/bpf_dummy_struct_ops.c | 3 ++- net/core/dev.c | 3 ++- net/core/sock_map.c | 13 +++++------ net/netfilter/nf_bpf_link.c | 3 ++- 16 files changed, 90 insertions(+), 78 deletions(-) Change list: v3 -> v4: - move netns_type field to the end in bpf_netns_link to fill the byte hole.(Jakub) - the series reviewed-by Jakub - patch1,2,3,4,7 acked-by Daniel - patch7 acked-by Nikolay - change the patch0 name to be consistent with the v1 version, sorry for that the name is the same as patch1 in v2 and v3. v3: https://lore.kernel.org/bpf/20250709030802.850175-1-chen.dylane@xxxxxxxxx v2 -> v3: - move sleepable field to the end in bpf_link to fill the byte hole.(Jiri) - Acked from Jiri v2: https://lore.kernel.org/bpf/20250708082228.824766-1-chen.dylane@xxxxxxxxx v1 -> v2: - fix build error.(Jiri) v1: https://lore.kernel.org/bpf/20250707153916.802802-1-chen.dylane@xxxxxxxxx -- 2.48.1
