[PATCH net-next 12/27] sctp: add get and set sockopt for reconf_enable
From: Xin Long <lucien.xin@gmail.com>
Date: 2017-01-01 11:22:28
Also in:
linux-sctp
Subsystem:
networking [general], sctp protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Marcelo Ricardo Leitner, Xin Long, Linus Torvalds
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. Signed-off-by: Xin Long <lucien.xin@gmail.com> --- include/uapi/linux/sctp.h | 1 + net/sctp/socket.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 82 insertions(+)
diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
index a406adc..4d3b621 100644
--- a/include/uapi/linux/sctp.h
+++ b/include/uapi/linux/sctp.h@@ -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 /* PR-SCTP policies */ #define SCTP_PR_SCTP_NONE 0x0000
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 318c678..e946bc2 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c@@ -3751,6 +3751,39 @@ static int sctp_setsockopt_default_prinfo(struct sock *sk, 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(¶ms, 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; +} + /* API 6.2 setsockopt(), getsockopt() * * Applications use setsockopt() and getsockopt() to set or retrieve
@@ -3917,6 +3950,9 @@ 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; default: retval = -ENOPROTOOPT; break;
@@ -6401,6 +6437,47 @@ static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len, 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(¶ms, 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, ¶ms, 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) {
@@ -6568,6 +6645,10 @@ 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; default: retval = -ENOPROTOOPT; break;
--
2.1.0