leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sctp: add sockopt to get/set stream scheduler

Browse Source 
As defined per RFC Draft ndata Section 4.3.2, named as
SCTP_STREAM_SCHEDULER.

See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-13
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner 2017-10-03 19:20:14 -03:00 committed by David S. Miller
parent 5bbbbe32a4
commit 13aa8770fe
2 changed files with 76 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/uapi/linux/sctp.h
View File

@ -122,6 +122,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_RESET_ASSOC 120
#define SCTP_ADD_STREAMS 121
#define SCTP_SOCKOPT_PEELOFF_FLAGS 122
#define SCTP_STREAM_SCHEDULER 123
/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000

75
net/sctp/socket.c
View File

@ -79,6 +79,7 @@
#include <net/sock.h>
#include <net/sctp/sctp.h>
#include <net/sctp/sm.h>
#include <net/sctp/stream_sched.h>
/* Forward declarations for internal helper functions. */
static int sctp_writeable(struct sock *sk);
@ -3914,6 +3915,36 @@ out:
return retval;
}
static int sctp_setsockopt_scheduler(struct sock *sk,
char __user *optval,
unsigned int optlen)
{
struct sctp_association *asoc;
struct sctp_assoc_value params;
int retval = -EINVAL;
if (optlen < sizeof(params))
goto out;
optlen = sizeof(params);
if (copy_from_user(&params, optval, optlen)) {
retval = -EFAULT;
goto out;
}
if (params.assoc_value > SCTP_SS_MAX)
goto out;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc)
goto out;
retval = sctp_sched_set_sched(asoc, params.assoc_value);
out:
return retval;
}
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@ -4095,6 +4126,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_ADD_STREAMS:
retval = sctp_setsockopt_add_streams(sk, optval, optlen);
break;
case SCTP_STREAM_SCHEDULER:
retval = sctp_setsockopt_scheduler(sk, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;
@ -6793,6 +6827,43 @@ out:
return retval;
}
static int sctp_getsockopt_scheduler(struct sock *sk, int len,
char __user *optval,
int __user *optlen)
{
struct sctp_assoc_value params;
struct sctp_association *asoc;
int retval = -EFAULT;
if (len < sizeof(params)) {
retval = -EINVAL;
goto out;
}
len = sizeof(params);
if (copy_from_user(&params, optval, len))
goto out;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (!asoc) {
retval = -EINVAL;
goto out;
}
params.assoc_value = sctp_sched_get_sched(asoc);
if (put_user(len, optlen))
goto out;
if (copy_to_user(optval, &params, len))
goto out;
retval = 0;
out:
return retval;
}
static int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@ -6975,6 +7046,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_enable_strreset(sk, len, optval,
optlen);
break;
case SCTP_STREAM_SCHEDULER:
retval = sctp_getsockopt_scheduler(sk, len, optval,
optlen);
break;
default:
retval = -ENOPROTOOPT;
break;