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bpf: Eliminate rlimit-based memory accounting for arraymap maps

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Do not use rlimit-based memory accounting for arraymap maps.
It has been replaced with the memcg-based memory accounting.

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20201201215900.3569844-19-guro@fb.com
This commit is contained in:
Roman Gushchin 2020-12-01 13:58:44 -08:00 committed by Alexei Starovoitov
parent 28e1dcdef0
commit 1bc5975613
1 changed files with 4 additions and 20 deletions
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24
kernel/bpf/arraymap.c
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@ -81,11 +81,10 @@ int array_map_alloc_check(union bpf_attr *attr)
static struct bpf_map *array_map_alloc(union bpf_attr *attr)
{
bool percpu = attr->map_type == BPF_MAP_TYPE_PERCPU_ARRAY;
int ret, numa_node = bpf_map_attr_numa_node(attr);
int numa_node = bpf_map_attr_numa_node(attr);
u32 elem_size, index_mask, max_entries;
bool bypass_spec_v1 = bpf_bypass_spec_v1();
u64 cost, array_size, mask64;
struct bpf_map_memory mem;
u64 array_size, mask64;
struct bpf_array *array;
elem_size = round_up(attr->value_size, 8);
@ -126,44 +125,29 @@ static struct bpf_map *array_map_alloc(union bpf_attr *attr)
}
}
/* make sure there is no u32 overflow later in round_up() */
cost = array_size;
if (percpu)
cost += (u64)attr->max_entries * elem_size * num_possible_cpus();
ret = bpf_map_charge_init(&mem, cost);
if (ret < 0)
return ERR_PTR(ret);
/* allocate all map elements and zero-initialize them */
if (attr->map_flags & BPF_F_MMAPABLE) {
void *data;
/* kmalloc'ed memory can't be mmap'ed, use explicit vmalloc */
data = bpf_map_area_mmapable_alloc(array_size, numa_node);
if (!data) {
bpf_map_charge_finish(&mem);
if (!data)
return ERR_PTR(-ENOMEM);
}
array = data + PAGE_ALIGN(sizeof(struct bpf_array))
- offsetof(struct bpf_array, value);
} else {
array = bpf_map_area_alloc(array_size, numa_node);
}
if (!array) {
bpf_map_charge_finish(&mem);
if (!array)
return ERR_PTR(-ENOMEM);
}
array->index_mask = index_mask;
array->map.bypass_spec_v1 = bypass_spec_v1;
/* copy mandatory map attributes */
bpf_map_init_from_attr(&array->map, attr);
bpf_map_charge_move(&array->map.memory, &mem);
array->elem_size = elem_size;
if (percpu && bpf_array_alloc_percpu(array)) {
bpf_map_charge_finish(&array->map.memory);
bpf_map_area_free(array);
return ERR_PTR(-ENOMEM);
}