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net: shrink struct ubuf_info

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We can benefit from a smaller struct ubuf_info, so leave only mandatory
fields and let users to decide how they want to extend it. Convert
MSG_ZEROCOPY to struct ubuf_info_msgzc and remove duplicated fields.
This reduces the size from 48 bytes to just 16.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Pavel Begunkov
2022-09-23 17:39:04 +01:00
committed by Jakub Kicinski
parent dfff202be5
commit e7d2b51016
5 changed files with 28 additions and 38 deletions
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2
net/ipv4/ip_output.c
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@@ -1043,7 +1043,7 @@ static int __ip_append_data(struct sock *sk,
paged = true;
zc = true;
} else {
uarg->zerocopy = 0;
uarg_to_msgzc(uarg)->zerocopy = 0;
skb_zcopy_set(skb, uarg, &extra_uref);
}
}