Ksawlii/kernel_samsung_a53x
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Reapply "bpf: Eliminate rlimit-based memory accounting for devmap maps"

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This reverts commit 41a87832ee.
This commit is contained in:
Ksawlii 2024-11-24 00:23:17 +01:00
parent 78f121c9d6
commit d439656b70
1 changed files with 2 additions and 16 deletions
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18
kernel/bpf/devmap.c
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@ -109,8 +109,6 @@ static inline struct hlist_head *dev_map_index_hash(struct bpf_dtab *dtab,
static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr)
{
u32 valsize = attr->value_size;
u64 cost = 0;
int err;
/* check sanity of attributes. 2 value sizes supported:
* 4 bytes: ifindex
@ -135,21 +133,13 @@ static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr)
if (!dtab->n_buckets) /* Overflow check */
return -EINVAL;
cost += (u64) sizeof(struct hlist_head) * dtab->n_buckets;
} else {
cost += (u64) dtab->map.max_entries * sizeof(struct bpf_dtab_netdev *);
}
/* if map size is larger than memlock limit, reject it */
err = bpf_map_charge_init(&dtab->map.memory, cost);
if (err)
return -EINVAL;
if (attr->map_type == BPF_MAP_TYPE_DEVMAP_HASH) {
dtab->dev_index_head = dev_map_create_hash(dtab->n_buckets,
dtab->map.numa_node);
if (!dtab->dev_index_head)
goto free_charge;
return -ENOMEM;
spin_lock_init(&dtab->index_lock);
} else {
@ -157,14 +147,10 @@ static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr)
sizeof(struct bpf_dtab_netdev *),
dtab->map.numa_node);
if (!dtab->netdev_map)
goto free_charge;
return -ENOMEM;
}
return 0;
free_charge:
bpf_map_charge_finish(&dtab->map.memory);
return -ENOMEM;
}
static struct bpf_map *dev_map_alloc(union bpf_attr *attr)