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sctp: add get and set sockopt for reconf_enable

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This patchset is to add SCTP_RECONFIG_SUPPORTED sockopt, it would
set and get asoc reconf_enable value when asoc_id is set, or it
would set and get ep reconf_enalbe value if asoc_id is 0.

It is also to add sysctl interface for users to set the default
value for reconf_enable.

After this patch, stream reconf will work.

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 2017-03-10 12:11:12 +08:00 committed by David S. Miller
parent 11ae76e67a
commit c0d8bab6ae
3 changed files with 89 additions and 0 deletions
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1
include/uapi/linux/sctp.h
View File

@ -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_RECONFIG_SUPPORTED 117
#define SCTP_ENABLE_STREAM_RESET 118
#define SCTP_RESET_STREAMS 119
#define SCTP_RESET_ASSOC 120

81
net/sctp/socket.c
View File

@ -3758,6 +3758,39 @@ out:
return retval;
}
static int sctp_setsockopt_reconfig_supported(struct sock *sk,
char __user *optval,
unsigned int optlen)
{
struct sctp_assoc_value params;
struct sctp_association *asoc;
int retval = -EINVAL;
if (optlen != sizeof(params))
goto out;
if (copy_from_user(&params, optval, optlen)) {
retval = -EFAULT;
goto out;
}
asoc = sctp_id2assoc(sk, params.assoc_id);
if (asoc) {
asoc->reconf_enable = !!params.assoc_value;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
sp->ep->reconf_enable = !!params.assoc_value;
} else {
goto out;
}
retval = 0;
out:
return retval;
}
static int sctp_setsockopt_enable_strreset(struct sock *sk,
char __user *optval,
unsigned int optlen)
@ -4038,6 +4071,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_DEFAULT_PRINFO:
retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);
break;
case SCTP_RECONFIG_SUPPORTED:
retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen);
break;
case SCTP_ENABLE_STREAM_RESET:
retval = sctp_setsockopt_enable_strreset(sk, optval, optlen);
break;
@ -6540,6 +6576,47 @@ out:
return retval;
}
static int sctp_getsockopt_reconfig_supported(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) {
params.assoc_value = asoc->reconf_enable;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
params.assoc_value = sp->ep->reconf_enable;
} else {
retval = -EINVAL;
goto out;
}
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_enable_strreset(struct sock *sk, int len,
char __user *optval,
int __user *optlen)
@ -6748,6 +6825,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
optlen);
break;
case SCTP_RECONFIG_SUPPORTED:
retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
optlen);
break;
case SCTP_ENABLE_STREAM_RESET:
retval = sctp_getsockopt_enable_strreset(sk, len, optval,
optlen);

7
net/sctp/sysctl.c
View File

@ -274,6 +274,13 @@ static struct ctl_table sctp_net_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "reconf_enable",
.data = &init_net.sctp.reconf_enable,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "auth_enable",
.data = &init_net.sctp.auth_enable,