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![]() Add LINK_DETACH command to force-detach bpf_link without destroying it. It has the same behavior as auto-detaching of bpf_link due to cgroup dying for bpf_cgroup_link or net_device being destroyed for bpf_xdp_link. In such case, bpf_link is still a valid kernel object, but is defuncts and doesn't hold BPF program attached to corresponding BPF hook. This functionality allows users with enough access rights to manually force-detach attached bpf_link without killing respective owner process. This patch implements LINK_DETACH for cgroup, xdp, and netns links, mostly re-using existing link release handling code. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200731182830.286260-2-andriin@fb.com |
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.. | ||
arraymap.c | ||
bpf_iter.c | ||
bpf_lru_list.c | ||
bpf_lru_list.h | ||
bpf_lsm.c | ||
bpf_struct_ops.c | ||
bpf_struct_ops_types.h | ||
btf.c | ||
cgroup.c | ||
core.c | ||
cpumap.c | ||
devmap.c | ||
disasm.c | ||
disasm.h | ||
dispatcher.c | ||
hashtab.c | ||
helpers.c | ||
inode.c | ||
local_storage.c | ||
lpm_trie.c | ||
Makefile | ||
map_in_map.c | ||
map_in_map.h | ||
map_iter.c | ||
net_namespace.c | ||
offload.c | ||
percpu_freelist.c | ||
percpu_freelist.h | ||
prog_iter.c | ||
queue_stack_maps.c | ||
reuseport_array.c | ||
ringbuf.c | ||
stackmap.c | ||
syscall.c | ||
sysfs_btf.c | ||
task_iter.c | ||
tnum.c | ||
trampoline.c | ||
verifier.c |