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Date: Fri, 6 Jan 2017 21:57:37 +0800
From: Xin Long <lucien.xin@...il.com>
To: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Cc: network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org,
Neil Horman <nhorman@...driver.com>,
Vlad Yasevich <vyasevich@...il.com>,
davem <davem@...emloft.net>
Subject: Re: [PATCHv2 net-next 1/3] sctp: add stream arrays in asoc
On Wed, Jan 4, 2017 at 9:39 PM, Marcelo Ricardo Leitner
<marcelo.leitner@...il.com> wrote:
> On Tue, Jan 03, 2017 at 01:59:46PM +0800, Xin Long wrote:
>> This patch is to add streamout and streamin arrays in asoc, initialize
>> them in sctp_process_init and free them in sctp_association_free.
>>
>> Stream arrays are used to replace ssnmap to save more stream things in
>> the next patch.
>>
>> Signed-off-by: Xin Long <lucien.xin@...il.com>
>> ---
>> include/net/sctp/structs.h | 18 ++++++++++++++++++
>> net/sctp/associola.c | 19 +++++++++++++++++++
>> net/sctp/sm_make_chunk.c | 17 ++++++++++++++++-
>> 3 files changed, 53 insertions(+), 1 deletion(-)
>>
>> diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
>> index 87d56cc..549f17d 100644
>> --- a/include/net/sctp/structs.h
>> +++ b/include/net/sctp/structs.h
>> @@ -1331,6 +1331,18 @@ struct sctp_inithdr_host {
>> __u32 initial_tsn;
>> };
>>
>> +struct sctp_stream_out {
>> + __u16 ssn;
>> + __u8 state;
>> +};
>> +
>> +struct sctp_stream_in {
>> + __u16 ssn;
>> +};
>> +
>> +#define SCTP_STREAM_CLOSED 0x00
>> +#define SCTP_STREAM_OPEN 0x01
>> +
>> /* SCTP_GET_ASSOC_STATS counters */
>> struct sctp_priv_assoc_stats {
>> /* Maximum observed rto in the association during subsequent
>> @@ -1879,6 +1891,12 @@ struct sctp_association {
>> temp:1, /* Is it a temporary association? */
>> prsctp_enable:1;
>>
>> + /* stream arrays */
>> + struct sctp_stream_out *streamout;
>> + struct sctp_stream_in *streamin;
>> + __u16 streamoutcnt;
>> + __u16 streamincnt;
>> +
>> struct sctp_priv_assoc_stats stats;
>>
>> int sent_cnt_removable;
>> diff --git a/net/sctp/associola.c b/net/sctp/associola.c
>> index d3cc30c..290ec4d 100644
>> --- a/net/sctp/associola.c
>> +++ b/net/sctp/associola.c
>> @@ -361,6 +361,10 @@ void sctp_association_free(struct sctp_association *asoc)
>> /* Free ssnmap storage. */
>> sctp_ssnmap_free(asoc->ssnmap);
>>
>> + /* Free stream information. */
>> + kfree(asoc->streamout);
>> + kfree(asoc->streamin);
>> +
>> /* Clean up the bound address list. */
>> sctp_bind_addr_free(&asoc->base.bind_addr);
>>
>> @@ -1130,6 +1134,8 @@ void sctp_assoc_update(struct sctp_association *asoc,
>> * has been discarded and needs retransmission.
>> */
>> if (asoc->state >= SCTP_STATE_ESTABLISHED) {
>> + int i;
>> +
>> asoc->next_tsn = new->next_tsn;
>> asoc->ctsn_ack_point = new->ctsn_ack_point;
>> asoc->adv_peer_ack_point = new->adv_peer_ack_point;
>> @@ -1139,6 +1145,12 @@ void sctp_assoc_update(struct sctp_association *asoc,
>> */
>> sctp_ssnmap_clear(asoc->ssnmap);
>>
>> + for (i = 0; i < asoc->streamoutcnt; i++)
>> + asoc->streamout[i].ssn = 0;
>> +
>> + for (i = 0; i < asoc->streamincnt; i++)
>> + asoc->streamin[i].ssn = 0;
>> +
>> /* Flush the ULP reassembly and ordered queue.
>> * Any data there will now be stale and will
>> * cause problems.
>> @@ -1168,6 +1180,13 @@ void sctp_assoc_update(struct sctp_association *asoc,
>> new->ssnmap = NULL;
>> }
>>
>> + if (!asoc->streamin && !asoc->streamout) {
>> + asoc->streamout = new->streamout;
>> + asoc->streamin = new->streamin;
>> + new->streamout = NULL;
>> + new->streamin = NULL;
>> + }
>> +
>> if (!asoc->assoc_id) {
>> /* get a new association id since we don't have one
>> * yet.
>> diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
>> index 9e9690b..eeadeef 100644
>> --- a/net/sctp/sm_make_chunk.c
>> +++ b/net/sctp/sm_make_chunk.c
>> @@ -2442,13 +2442,28 @@ int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,
>> * association.
>> */
>> if (!asoc->temp) {
>> - int error;
>> + int error, i;
>> +
>> + asoc->streamoutcnt = asoc->c.sinit_num_ostreams;
>> + asoc->streamincnt = asoc->c.sinit_max_instreams;
>>
>> asoc->ssnmap = sctp_ssnmap_new(asoc->c.sinit_max_instreams,
>> asoc->c.sinit_num_ostreams, gfp);
>> if (!asoc->ssnmap)
>> goto clean_up;
>>
>> + asoc->streamout = kcalloc(asoc->streamoutcnt,
>> + sizeof(*asoc->streamout), gfp);
>> + if (!asoc->streamout)
>> + goto clean_up;
>> + for (i = 0; i < asoc->streamoutcnt; i++)
>> + asoc->streamout[i].state = SCTP_STREAM_OPEN;
>> +
>> + asoc->streamin = kcalloc(asoc->streamincnt,
>> + sizeof(*asoc->streamin), gfp);
>> + if (!asoc->streamin)
>> + goto clean_up;
>> +
>
> Xin, I understand the need to remove the 'ssnmap' term from the charts
> here as it will be, but lets try to put all the inner details of stream
> handling in a dedicated file.
>
> On the original patchset you were creating stream.c for RFC 6525 stuff.
> We probably can create it earlier and concentrate everything
> stream-related in there, so we keep it more contained. Thanks
will improve and repost.
>
>
>> error = sctp_assoc_set_id(asoc, gfp);
>> if (error)
>> goto clean_up;
>> --
>> 2.1.0
>>
>> --
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>>
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