sctp: Export sctp_do_peeloff

lookup sctp_association within sctp_do_peeloff() to enable its use outside of
the sctp code with minimal knowledge of the former.

Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index d368561..6ee44b2 100644 (file)
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -413,6 +413,7 @@ static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
 /* Look up the association by its id.  */
 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
 
+int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp);
 
 /* A macro to walk a list of skbs.  */
 #define sctp_skb_for_each(pos, head, tmp) \

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 408ebd0..06b42b7 100644 (file)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4170,14 +4170,16 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv
 }
 
 /* Helper routine to branch off an association to a new socket.  */
-SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
-                               struct socket **sockp)
+int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
 {
-       struct sock *sk = asoc->base.sk;
+       struct sctp_association *asoc = sctp_id2assoc(sk, id);
        struct socket *sock;
        struct sctp_af *af;
        int err = 0;
 
+       if (!asoc)
+               return -EINVAL;
+
        /* An association cannot be branched off from an already peeled-off
         * socket, nor is this supported for tcp style sockets.
         */
@@ -4206,13 +4208,13 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
 
        return err;
 }
+EXPORT_SYMBOL(sctp_do_peeloff);
 
 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
 {
        sctp_peeloff_arg_t peeloff;
        struct socket *newsock;
        int retval = 0;
-       struct sctp_association *asoc;
 
        if (len < sizeof(sctp_peeloff_arg_t))
                return -EINVAL;
@@ -4220,15 +4222,7 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
        if (copy_from_user(&peeloff, optval, len))
                return -EFAULT;
 
-       asoc = sctp_id2assoc(sk, peeloff.associd);
-       if (!asoc) {
-               retval = -EINVAL;
-               goto out;
-       }
-
-       SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __func__, sk, asoc);
-
-       retval = sctp_do_peeloff(asoc, &newsock);
+       retval = sctp_do_peeloff(sk, peeloff.associd, &newsock);
        if (retval < 0)
                goto out;
 
@@ -4239,8 +4233,8 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
                goto out;
        }
 
-       SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n",
-                         __func__, sk, asoc, newsock->sk, retval);
+       SCTP_DEBUG_PRINTK("%s: sk: %p newsk: %p sd: %d\n",
+                         __func__, sk, newsock->sk, retval);
 
        /* Return the fd mapped to the new socket.  */
        peeloff.sd = retval;