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bpf: move memory size checks to bpf_map_charge_init()

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Most bpf map types doing similar checks and bytes to pages
conversion during memory allocation and charging.

Let's unify these checks by moving them into bpf_map_charge_init().

Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Roman Gushchin 2019-05-29 18:03:59 -07:00 • committed by Alexei Starovoitov
parent b936ca643a
commit c85d69135a
14 changed files with 20 additions and 67 deletions
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8
net/core/sock_map.c
View file

@ -44,13 +44,7 @@ static struct bpf_map *sock_map_alloc(union bpf_attr *attr)
/* Make sure page count doesn't overflow. */
cost = (u64) stab->map.max_entries * sizeof(struct sock *);
if (cost >= U32_MAX - PAGE_SIZE) {
err = -EINVAL;
goto free_stab;
}
err = bpf_map_charge_init(&stab->map.memory,
round_up(cost, PAGE_SIZE) >> PAGE_SHIFT);
err = bpf_map_charge_init(&stab->map.memory, cost);
if (err)
goto free_stab;