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tap/tun: add skb_zcopy_init() helper for initialization.

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Replace direct assignments with skb_zcopy_init() for zerocopy
cases where a new skb is initialized, without changing the
reference counts.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jonathan Lemon
2021-01-06 14:18:40 -08:00
committed by Jakub Kicinski
parent 04c2d33eab
commit 9ee5e5ade0
4 changed files with 10 additions and 6 deletions
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9
include/linux/skbuff.h
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@@ -1448,6 +1448,12 @@ static inline void skb_zcopy_get(struct ubuf_info *uarg)
refcount_inc(&uarg->refcnt);
}
static inline void skb_zcopy_init(struct sk_buff *skb, struct ubuf_info *uarg)
{
skb_shinfo(skb)->destructor_arg = uarg;
skb_shinfo(skb)->flags |= uarg->flags;
}
static inline void skb_zcopy_set(struct sk_buff *skb, struct ubuf_info *uarg,
bool *have_ref)
{
@@ -1456,8 +1462,7 @@ static inline void skb_zcopy_set(struct sk_buff *skb, struct ubuf_info *uarg,
*have_ref = false;
else
skb_zcopy_get(uarg);
skb_shinfo(skb)->destructor_arg = uarg;
skb_shinfo(skb)->flags |= uarg->flags;
skb_zcopy_init(skb, uarg);
}
}