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bpf: group memory related fields in struct bpf_map_memory

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Group "user" and "pages" fields of bpf_map into the bpf_map_memory
structure. Later it can be extended with "memcg" and other related
information.

The main reason for a such change (beside cosmetics) is to pass
bpf_map_memory structure to charging functions before the actual
allocation of bpf_map.

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 18:03:57 -07:00
committed by Alexei Starovoitov
parent d50836cda6
commit 3539b96e04
14 changed files with 36 additions and 31 deletions
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10
include/linux/bpf.h
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@@ -66,6 +66,11 @@ struct bpf_map_ops {
u64 imm, u32 *off);
};
struct bpf_map_memory {
u32 pages;
struct user_struct *user;
};
struct bpf_map {
/* The first two cachelines with read-mostly members of which some
* are also accessed in fast-path (e.g. ops, max_entries).
@@ -86,7 +91,7 @@ struct bpf_map {
u32 btf_key_type_id;
u32 btf_value_type_id;
struct btf *btf;
u32 pages;
struct bpf_map_memory memory;
bool unpriv_array;
bool frozen; /* write-once */
/* 48 bytes hole */
@@ -94,8 +99,7 @@ struct bpf_map {
/* The 3rd and 4th cacheline with misc members to avoid false sharing
* particularly with refcounting.
*/
struct user_struct *user ____cacheline_aligned;
atomic_t refcnt;
atomic_t refcnt ____cacheline_aligned;
atomic_t usercnt;
struct work_struct work;
char name[BPF_OBJ_NAME_LEN];