From 0c3f6f655487d12c7a0c16914c98c599043e88d3 Mon Sep 17 00:00:00 2001 From: Xin Long Date: Fri, 8 Dec 2017 21:04:01 +0800 Subject: sctp: implement make_datafrag for sctp_stream_interleave To avoid hundreds of checks for the different process on I-DATA chunk, struct sctp_stream_interleave is defined as a group of functions used to replace the codes in some place where it needs to do different job according to if the asoc intl_enabled is set. With these ops, it only needs to initialize asoc->stream.si with sctp_stream_interleave_0 for normal data if asoc intl_enable is 0, or sctp_stream_interleave_1 for idata if asoc intl_enable is set in sctp_stream_init. After that, the members in asoc->stream.si can be used directly in some special places without checking asoc intl_enable. make_datafrag is the first member for sctp_stream_interleave, it's used to make data or idata frags, called in sctp_datamsg_from_user. The old function sctp_make_datafrag_empty needs to be adjust some to fit in this ops. Note that as idata and data chunks have different length, it also defines data_chunk_len for sctp_stream_interleave to describe the chunk size. Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Acked-by: Neil Horman Signed-off-by: David S. Miller --- net/sctp/stream.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/sctp/stream.c') diff --git a/net/sctp/stream.c b/net/sctp/stream.c index 76ea66be0bbe..8370e6cfe897 100644 --- a/net/sctp/stream.c +++ b/net/sctp/stream.c @@ -167,6 +167,7 @@ int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, sched->init(stream); in: + sctp_stream_interleave_init(stream); if (!incnt) goto out; -- cgit v1.2.3