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sctp: add SCTP_CURRENT_ASSOC for SCTP_STREAM_SCHEDULER_VALUE sockopt 

SCTP_STREAM_SCHEDULER_VALUE is a special one, as its value is not
save in sctp_sock, but only in asoc. So only SCTP_CURRENT_ASSOC
reserved assoc_id can be used in sctp_setsockopt_scheduler_value.

This patch adds SCTP_CURRENT_ASOC support for
SCTP_STREAM_SCHEDULER_VALUE.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-01-28 15:08:33 +08:00 committed by David S. Miller
parent 2e7709d1cc
commit e7f2824891
1 changed files with 17 additions and 4 deletions
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21
net/sctp/socket.c
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@ -4211,8 +4211,8 @@ static int sctp_setsockopt_scheduler_value(struct sock *sk,
char __user *optval,
unsigned int optlen)
{
struct sctp_association *asoc;
struct sctp_stream_value params;
struct sctp_association *asoc;
int retval = -EINVAL;
if (optlen < sizeof(params))
@ -4225,11 +4225,24 @@ static int sctp_setsockopt_scheduler_value(struct sock *sk,
}
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc)
if (!asoc && params.assoc_id != SCTP_CURRENT_ASSOC &&
sctp_style(sk, UDP))
goto out;
retval = sctp_sched_set_value(asoc, params.stream_id,
params.stream_value, GFP_KERNEL);
if (asoc) {
retval = sctp_sched_set_value(asoc, params.stream_id,
params.stream_value, GFP_KERNEL);
goto out;
}
retval = 0;
list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) {
int ret = sctp_sched_set_value(asoc, params.stream_id,
params.stream_value, GFP_KERNEL);
if (ret && !retval) /* try to return the 1st error. */
retval = ret;
}
out:
return retval;