bpf: use bpf_map_kvcalloc in bpf_local_storage

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[ Upstream commit ddef81b5fd ]

Introduce new helper bpf_map_kvcalloc() for the memory allocation in
bpf_local_storage(). Then the allocation will charge the memory from the
map instead of from current, though currently they are the same thing as
it is only used in map creation path now. By charging map's memory into
the memcg from the map, it will be more clear.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Link: https://lore.kernel.org/r/20230210154734.4416-3-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Stable-dep-of: af253aef18 ("bpf: fix order of args in call to bpf_map_kvcalloc")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Yafang Shao 2023-02-10 15:47:32 +00:00 • committed by Greg Kroah-Hartman

parent 56161b324b

commit 902219ed3f

3 changed files with 25 additions and 2 deletions

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8

include/linux/bpf.h

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4

kernel/bpf/bpf_local_storage.c

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15

kernel/bpf/syscall.c

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