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authorDaniel Borkmann <daniel@iogearbox.net>2019-05-14 01:18:55 +0200
committerAlexei Starovoitov <ast@kernel.org>2019-05-14 19:47:29 +0200
commitc6110222c6f49ea68169f353565eb865488a8619 (patch)
tree181de3f33b1e298789b1827b0103d6304f532a86 /mm/balloon_compaction.c
parenttools/bpf: Sync kernel btf.h header (diff)
downloadlinux-c6110222c6f49ea68169f353565eb865488a8619.tar.xz
linux-c6110222c6f49ea68169f353565eb865488a8619.zip
bpf: add map_lookup_elem_sys_only for lookups from syscall side
Add a callback map_lookup_elem_sys_only() that map implementations could use over map_lookup_elem() from system call side in case the map implementation needs to handle the latter differently than from the BPF data path. If map_lookup_elem_sys_only() is set, this will be preferred pick for map lookups out of user space. This hook is used in a follow-up fix for LRU map, but once development window opens, we can convert other map types from map_lookup_elem() (here, the one called upon BPF_MAP_LOOKUP_ELEM cmd is meant) over to use the callback to simplify and clean up the latter. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'mm/balloon_compaction.c')
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