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| author | Xin Long <lucien.xin@gmail.com> | 2017-12-08 21:04:01 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-11 11:23:04 -0500 |
| commit | 0c3f6f655487d12c7a0c16914c98c599043e88d3 (patch) | |
| tree | 4fa938da18a6b9e40ac49382ad03359d412ef1b3 /net/sctp/chunk.c | |
| parent | ad05a7a05ede28ba6dd935d9e932264a22518b1f (diff) | |
| download | linux-0c3f6f655487d12c7a0c16914c98c599043e88d3.tar.gz linux-0c3f6f655487d12c7a0c16914c98c599043e88d3.tar.bz2 linux-0c3f6f655487d12c7a0c16914c98c599043e88d3.zip | |
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 <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/chunk.c')
| -rw-r--r-- | net/sctp/chunk.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c index 7f8baa48e7c2..62adaaacc4ab 100644 --- a/net/sctp/chunk.c +++ b/net/sctp/chunk.c @@ -191,7 +191,7 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, */ max_data = asoc->pathmtu - sctp_sk(asoc->base.sk)->pf->af->net_header_len - - sizeof(struct sctphdr) - sizeof(struct sctp_data_chunk); + sizeof(struct sctphdr) - sctp_datachk_len(&asoc->stream); max_data = SCTP_TRUNC4(max_data); /* If the the peer requested that we authenticate DATA chunks @@ -264,8 +264,8 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, frag |= SCTP_DATA_SACK_IMM; } - chunk = sctp_make_datafrag_empty(asoc, sinfo, len, frag, - 0, GFP_KERNEL); + chunk = asoc->stream.si->make_datafrag(asoc, sinfo, len, frag, + GFP_KERNEL); if (!chunk) { err = -ENOMEM; goto errout; |