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sctp: add SCTP_PR_STREAM_STATUS sockopt for prsctp

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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@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long
2017-04-01 17:07:46 +08:00
committed by David S. Miller
parent cdccf74b95
commit d229d48d18
5 changed files with 84 additions and 2 deletions
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59
net/sctp/socket.c
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@@ -6576,6 +6576,61 @@ out:
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(&params, 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, &params, 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);