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Date: Sat, 1 Apr 2017 10:19:31 -0300
From: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To: Xin Long <lucien.xin@...il.com>
Cc: network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org,
Neil Horman <nhorman@...driver.com>, davem@...emloft.net
Subject: Re: [PATCHv2 net-next] sctp: add SCTP_PR_STREAM_STATUS sockopt for
prsctp
On Sat, Apr 01, 2017 at 05:07:46PM +0800, Xin Long wrote:
> Before when implementing sctp prsctp, SCTP_PR_STREAM_STATUS wasn't
> added, as it needs to save abandoned_(un)sent for every stream.
>
> After sctp stream reconf is added in sctp, assoc has structure
> sctp_stream_out to save per stream info.
>
> This patch is to add SCTP_PR_STREAM_STATUS by putting the prsctp
> per stream statistics into sctp_stream_out.
>
> v1->v2:
> fix an indent issue.
>
> Signed-off-by: Xin Long <lucien.xin@...il.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
> ---
> include/net/sctp/structs.h | 2 ++
> include/uapi/linux/sctp.h | 1 +
> net/sctp/chunk.c | 14 +++++++++--
> net/sctp/outqueue.c | 10 ++++++++
> net/sctp/socket.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 84 insertions(+), 2 deletions(-)
>
> diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
> index 592dece..3e61a54 100644
> --- a/include/net/sctp/structs.h
> +++ b/include/net/sctp/structs.h
> @@ -1315,6 +1315,8 @@ struct sctp_inithdr_host {
> struct sctp_stream_out {
> __u16 ssn;
> __u8 state;
> + __u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1];
> + __u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1];
> };
>
> struct sctp_stream_in {
> diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
> index 7212870..ced9d8b 100644
> --- a/include/uapi/linux/sctp.h
> +++ b/include/uapi/linux/sctp.h
> @@ -115,6 +115,7 @@ typedef __s32 sctp_assoc_t;
> #define SCTP_PR_SUPPORTED 113
> #define SCTP_DEFAULT_PRINFO 114
> #define SCTP_PR_ASSOC_STATUS 115
> +#define SCTP_PR_STREAM_STATUS 116
> #define SCTP_RECONFIG_SUPPORTED 117
> #define SCTP_ENABLE_STREAM_RESET 118
> #define SCTP_RESET_STREAMS 119
> diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
> index e3621cb..697721a 100644
> --- a/net/sctp/chunk.c
> +++ b/net/sctp/chunk.c
> @@ -306,14 +306,24 @@ int sctp_chunk_abandoned(struct sctp_chunk *chunk)
>
> if (SCTP_PR_TTL_ENABLED(chunk->sinfo.sinfo_flags) &&
> time_after(jiffies, chunk->msg->expires_at)) {
> - if (chunk->sent_count)
> + struct sctp_stream_out *streamout =
> + &chunk->asoc->stream->out[chunk->sinfo.sinfo_stream];
> +
> + if (chunk->sent_count) {
> chunk->asoc->abandoned_sent[SCTP_PR_INDEX(TTL)]++;
> - else
> + streamout->abandoned_sent[SCTP_PR_INDEX(TTL)]++;
> + } else {
> chunk->asoc->abandoned_unsent[SCTP_PR_INDEX(TTL)]++;
> + streamout->abandoned_unsent[SCTP_PR_INDEX(TTL)]++;
> + }
> return 1;
> } else if (SCTP_PR_RTX_ENABLED(chunk->sinfo.sinfo_flags) &&
> chunk->sent_count > chunk->sinfo.sinfo_timetolive) {
> + struct sctp_stream_out *streamout =
> + &chunk->asoc->stream->out[chunk->sinfo.sinfo_stream];
> +
> chunk->asoc->abandoned_sent[SCTP_PR_INDEX(RTX)]++;
> + streamout->abandoned_sent[SCTP_PR_INDEX(RTX)]++;
> return 1;
> } else if (!SCTP_PR_POLICY(chunk->sinfo.sinfo_flags) &&
> chunk->msg->expires_at &&
> diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
> index 025ccff..3f78d7f 100644
> --- a/net/sctp/outqueue.c
> +++ b/net/sctp/outqueue.c
> @@ -353,6 +353,8 @@ static int sctp_prsctp_prune_sent(struct sctp_association *asoc,
> struct sctp_chunk *chk, *temp;
>
> list_for_each_entry_safe(chk, temp, queue, transmitted_list) {
> + struct sctp_stream_out *streamout;
> +
> if (!SCTP_PR_PRIO_ENABLED(chk->sinfo.sinfo_flags) ||
> chk->sinfo.sinfo_timetolive <= sinfo->sinfo_timetolive)
> continue;
> @@ -361,8 +363,10 @@ static int sctp_prsctp_prune_sent(struct sctp_association *asoc,
> sctp_insert_list(&asoc->outqueue.abandoned,
> &chk->transmitted_list);
>
> + streamout = &asoc->stream->out[chk->sinfo.sinfo_stream];
> asoc->sent_cnt_removable--;
> asoc->abandoned_sent[SCTP_PR_INDEX(PRIO)]++;
> + streamout->abandoned_sent[SCTP_PR_INDEX(PRIO)]++;
>
> if (!chk->tsn_gap_acked) {
> if (chk->transport)
> @@ -396,6 +400,12 @@ static int sctp_prsctp_prune_unsent(struct sctp_association *asoc,
> q->out_qlen -= chk->skb->len;
> asoc->sent_cnt_removable--;
> asoc->abandoned_unsent[SCTP_PR_INDEX(PRIO)]++;
> + if (chk->sinfo.sinfo_stream < asoc->stream->outcnt) {
> + struct sctp_stream_out *streamout =
> + &asoc->stream->out[chk->sinfo.sinfo_stream];
> +
> + streamout->abandoned_unsent[SCTP_PR_INDEX(PRIO)]++;
> + }
>
> msg_len -= SCTP_DATA_SNDSIZE(chk) +
> sizeof(struct sk_buff) +
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index ccc08fc..6489446 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -6576,6 +6576,61 @@ static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
> return retval;
> }
>
> +static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
> + char __user *optval,
> + int __user *optlen)
> +{
> + struct sctp_stream_out *streamout;
> + struct sctp_association *asoc;
> + struct sctp_prstatus params;
> + int retval = -EINVAL;
> + int policy;
> +
> + if (len < sizeof(params))
> + goto out;
> +
> + len = sizeof(params);
> + if (copy_from_user(¶ms, optval, len)) {
> + retval = -EFAULT;
> + goto out;
> + }
> +
> + policy = params.sprstat_policy;
> + if (policy & ~SCTP_PR_SCTP_MASK)
> + goto out;
> +
> + asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
> + if (!asoc || params.sprstat_sid >= asoc->stream->outcnt)
> + goto out;
> +
> + streamout = &asoc->stream->out[params.sprstat_sid];
> + if (policy == SCTP_PR_SCTP_NONE) {
> + params.sprstat_abandoned_unsent = 0;
> + params.sprstat_abandoned_sent = 0;
> + for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
> + params.sprstat_abandoned_unsent +=
> + streamout->abandoned_unsent[policy];
> + params.sprstat_abandoned_sent +=
> + streamout->abandoned_sent[policy];
> + }
> + } else {
> + params.sprstat_abandoned_unsent =
> + streamout->abandoned_unsent[__SCTP_PR_INDEX(policy)];
> + params.sprstat_abandoned_sent =
> + streamout->abandoned_sent[__SCTP_PR_INDEX(policy)];
> + }
> +
> + if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
> + retval = -EFAULT;
> + goto out;
> + }
> +
> + retval = 0;
> +
> +out:
> + return retval;
> +}
> +
> static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
> char __user *optval,
> int __user *optlen)
> @@ -6825,6 +6880,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
> retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
> optlen);
> break;
> + case SCTP_PR_STREAM_STATUS:
> + retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
> + optlen);
> + break;
> case SCTP_RECONFIG_SUPPORTED:
> retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
> optlen);
> --
> 2.1.0
>
> --
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