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| author | Alexei Starovoitov <ast@kernel.org> | 2024-03-06 19:12:28 -0800 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2024-03-07 14:58:48 -0800 |
| commit | fe5064158c561b807af5708c868f6c7cb5144e01 (patch) | |
| tree | afd0ca6870d3abf41b811e706c3f788057183e9b /kernel/bpf/core.c | |
| parent | 1576b07961971d4eeb0e269c7133e9a6d430daf8 (diff) | |
| download | lwn-fe5064158c561b807af5708c868f6c7cb5144e01.tar.gz lwn-fe5064158c561b807af5708c868f6c7cb5144e01.zip | |
bpf: Tell bpf programs kernel's PAGE_SIZE
vmlinux BTF includes all kernel enums.
Add __PAGE_SIZE = PAGE_SIZE enum, so that bpf programs
that include vmlinux.h can easily access it.
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/r/20240307031228.42896-7-alexei.starovoitov@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'kernel/bpf/core.c')
| -rw-r--r-- | kernel/bpf/core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 9ee4536d0a09..134b7979f537 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -88,13 +88,18 @@ void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb, int k, uns return NULL; } +/* tell bpf programs that include vmlinux.h kernel's PAGE_SIZE */ +enum page_size_enum { + __PAGE_SIZE = PAGE_SIZE +}; + struct bpf_prog *bpf_prog_alloc_no_stats(unsigned int size, gfp_t gfp_extra_flags) { gfp_t gfp_flags = bpf_memcg_flags(GFP_KERNEL | __GFP_ZERO | gfp_extra_flags); struct bpf_prog_aux *aux; struct bpf_prog *fp; - size = round_up(size, PAGE_SIZE); + size = round_up(size, __PAGE_SIZE); fp = __vmalloc(size, gfp_flags); if (fp == NULL) return NULL; |