Re: [PATCH bpf-next v6 1/7] bpf: Renames to prepare for generalizing sk_storage.
From: Martin KaFai Lau <hidden>
Date: 2020-07-24 05:32:03
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On Thu, Jul 23, 2020 at 01:50:26PM +0200, KP Singh wrote:
From: KP Singh <redacted> A purely mechanical change to split the renaming from the actual generalization. Flags/consts: SK_STORAGE_CREATE_FLAG_MASK BPF_LOCAL_STORAGE_CREATE_FLAG_MASK BPF_SK_STORAGE_CACHE_SIZE BPF_LOCAL_STORAGE_CACHE_SIZE MAX_VALUE_SIZE BPF_LOCAL_STORAGE_MAX_VALUE_SIZE Structs: bucket bpf_local_storage_map_bucket bpf_sk_storage_map bpf_local_storage_map bpf_sk_storage_data bpf_local_storage_data bpf_sk_storage_elem bpf_local_storage_elem bpf_sk_storage bpf_local_storage selem_linked_to_sk selem_linked_to_storage selem_alloc bpf_selem_alloc The "sk" member in bpf_local_storage is also updated to "owner" in preparation for changing the type to void * in a subsequent patch. Functions: __selem_unlink_sk bpf_selem_unlink_storage __selem_link_sk bpf_selem_link_storage selem_unlink_sk __bpf_selem_unlink_storage sk_storage_update bpf_local_storage_update __sk_storage_lookup bpf_local_storage_lookup bpf_sk_storage_map_free bpf_local_storage_map_free bpf_sk_storage_map_alloc bpf_local_storage_map_alloc bpf_sk_storage_map_alloc_check bpf_local_storage_map_alloc_check bpf_sk_storage_map_check_btf bpf_local_storage_map_check_btf
Thanks for separating this mechanical name change in a separate patch. It is much easier to follow. This patch looks good. A minor thought is, when I look at unlink_map() and unlink_storage(), it keeps me looking back for the lock situation. I think the main reason is the bpf_selem_unlink_map() is locked but bpf_selem_unlink_storage() is unlocked now. May be: bpf_selem_unlink_map() => bpf_selem_unlink_map_locked() bpf_selem_link_map() => bpf_selem_link_map_locked() __bpf_selem_unlink_storage() => bpf_selem_unlink_storage_locked() bpf_link_storage() means unlocked bpf_unlink_storage() means unlocked. I think it could be one follow-up patch later instead of interrupting multiple patches in this set for this minor thing. For now, lets continue with this and remember default is nolock for storage. I will continue tomorrow.