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4cc9ce4e73
Provide the a ability to define local storage caches on a per-object type basis. The caches and caching indices for different objects should not be inter-mixed as suggested in: https://lore.kernel.org/bpf/20200630193441.kdwnkestulg5erii@kafai-mbp.dhcp.thefacebook.com/ "Caching a sk-storage at idx=0 of a sk should not stop an inode-storage to be cached at the same idx of a inode." Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200825182919.1118197-3-kpsingh@chromium.org
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2019 Facebook */
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#ifndef _BPF_SK_STORAGE_H
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#define _BPF_SK_STORAGE_H
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#include <linux/types.h>
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#include <linux/spinlock.h>
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struct sock;
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void bpf_sk_storage_free(struct sock *sk);
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extern const struct bpf_func_proto bpf_sk_storage_get_proto;
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extern const struct bpf_func_proto bpf_sk_storage_delete_proto;
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struct bpf_sk_storage_diag;
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struct sk_buff;
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struct nlattr;
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struct sock;
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#define BPF_LOCAL_STORAGE_CACHE_SIZE 16
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struct bpf_local_storage_cache {
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spinlock_t idx_lock;
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u64 idx_usage_counts[BPF_LOCAL_STORAGE_CACHE_SIZE];
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};
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#define DEFINE_BPF_STORAGE_CACHE(name) \
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static struct bpf_local_storage_cache name = { \
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.idx_lock = __SPIN_LOCK_UNLOCKED(name.idx_lock), \
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}
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u16 bpf_local_storage_cache_idx_get(struct bpf_local_storage_cache *cache);
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void bpf_local_storage_cache_idx_free(struct bpf_local_storage_cache *cache,
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u16 idx);
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#ifdef CONFIG_BPF_SYSCALL
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int bpf_sk_storage_clone(const struct sock *sk, struct sock *newsk);
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struct bpf_sk_storage_diag *
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bpf_sk_storage_diag_alloc(const struct nlattr *nla_stgs);
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void bpf_sk_storage_diag_free(struct bpf_sk_storage_diag *diag);
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int bpf_sk_storage_diag_put(struct bpf_sk_storage_diag *diag,
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struct sock *sk, struct sk_buff *skb,
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int stg_array_type,
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unsigned int *res_diag_size);
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#else
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static inline int bpf_sk_storage_clone(const struct sock *sk,
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struct sock *newsk)
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{
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return 0;
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}
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static inline struct bpf_sk_storage_diag *
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bpf_sk_storage_diag_alloc(const struct nlattr *nla)
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{
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return NULL;
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}
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static inline void bpf_sk_storage_diag_free(struct bpf_sk_storage_diag *diag)
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{
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}
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static inline int bpf_sk_storage_diag_put(struct bpf_sk_storage_diag *diag,
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struct sock *sk, struct sk_buff *skb,
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int stg_array_type,
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unsigned int *res_diag_size)
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{
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return 0;
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}
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#endif
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#endif /* _BPF_SK_STORAGE_H */
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