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Message-ID: <20220621163757.760304-2-roberto.sassu@huawei.com>
Date: Tue, 21 Jun 2022 18:37:53 +0200
From: Roberto Sassu <roberto.sassu@...wei.com>
To: <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
<kpsingh@...nel.org>, <john.fastabend@...il.com>,
<songliubraving@...com>, <kafai@...com>, <yhs@...com>
CC: <dhowells@...hat.com>, <keyrings@...r.kernel.org>,
<bpf@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Roberto Sassu <roberto.sassu@...wei.com>,
Joanne Koong <joannelkoong@...il.com>
Subject: [PATCH v5 1/5] bpf: Export bpf_dynptr_get_size()
Export bpf_dynptr_get_size(), so that kernel code dealing with eBPF dynamic
pointers can obtain the real size of data carried by this data structure.
Reviewed-by: Joanne Koong <joannelkoong@...il.com>
Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
include/linux/bpf.h | 1 +
kernel/bpf/helpers.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index d05e1495a06e..3ec0f167e9d7 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -2521,5 +2521,6 @@ void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
enum bpf_dynptr_type type, u32 offset, u32 size);
void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);
int bpf_dynptr_check_size(u32 size);
+u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr);
#endif /* _LINUX_BPF_H */
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index a1c84d256f83..3f5ff8dbd3cb 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -1430,7 +1430,7 @@ static void bpf_dynptr_set_type(struct bpf_dynptr_kern *ptr, enum bpf_dynptr_typ
ptr->size |= type << DYNPTR_TYPE_SHIFT;
}
-static u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr)
+u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr)
{
return ptr->size & DYNPTR_SIZE_MASK;
}
--
2.25.1
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