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authorXin Long <lucien.xin@gmail.com>2017-03-10 07:11:12 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-13 09:22:24 +0300
commitc0d8bab6ae518cedfb5246e99ece43fe51d79b56 (patch)
treef3b517d0315fe631e83a1734f647ab77c3283a3a /net/sctp
parent11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 (diff)
downloadlinux-c0d8bab6ae518cedfb5246e99ece43fe51d79b56.tar.xz
sctp: add get and set sockopt for reconf_enable
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>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c81
-rw-r--r--net/sctp/sysctl.c7
2 files changed, 88 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 6f0a9be50f50..24e28cfb542b 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -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);
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index daf8554fd42a..0e732f68c2bf 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -275,6 +275,13 @@ static struct ctl_table sctp_net_table[] = {
.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,
.maxlen = sizeof(int),