1 files changed, 245 insertions, 22 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index a1d026f12b0e..11938fb20395 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -941,7 +941,7 @@ SCTP_STATIC int sctp_setsockopt_bindx(struct sock* sk,
         default:
                 err = -EINVAL;
                 break;
-        };
+        }
 
 out:
         kfree(kaddrs);
@@ -2039,6 +2039,10 @@ static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval,
  *                     SPP_HB_DEMAND - Request a user initiated heartbeat
  *                     to be made immediately.
  *
+ *                     SPP_HB_TIME_IS_ZERO - Specify's that the time for
+ *                     heartbeat delayis to be set to the value of 0
+ *                     milliseconds.
+ *
  *                     SPP_PMTUD_ENABLE - This field will enable PMTU
  *                     discovery upon the specified address. Note that
  *                     if the address feild is empty then all addresses
@@ -2081,13 +2085,30 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
                         return error;
         }
 
-        if (params->spp_hbinterval) {
-                if (trans) {
-                        trans->hbinterval = msecs_to_jiffies(params->spp_hbinterval);
-                } else if (asoc) {
-                        asoc->hbinterval = msecs_to_jiffies(params->spp_hbinterval);
-                } else {
-                        sp->hbinterval = params->spp_hbinterval;
+        /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
+         * this field is ignored.  Note also that a value of zero indicates
+         * the current setting should be left unchanged.
+         */
+        if (params->spp_flags & SPP_HB_ENABLE) {
+
+                /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
+                 * set.  This lets us use 0 value when this flag
+                 * is set.
+                 */
+                if (params->spp_flags & SPP_HB_TIME_IS_ZERO)
+                        params->spp_hbinterval = 0;
+
+                if (params->spp_hbinterval ||
+                    (params->spp_flags & SPP_HB_TIME_IS_ZERO)) {
+                        if (trans) {
+                                trans->hbinterval =
+                                    msecs_to_jiffies(params->spp_hbinterval);
+                        } else if (asoc) {
+                                asoc->hbinterval =
+                                    msecs_to_jiffies(params->spp_hbinterval);
+                        } else {
+                                sp->hbinterval = params->spp_hbinterval;
+                        }
                 }
         }
 
@@ -2104,7 +2125,12 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
                 }
         }
 
-        if (params->spp_pathmtu) {
+        /* When Path MTU discovery is disabled the value specified here will
+         * be the "fixed" path mtu (i.e. the value of the spp_flags field must
+         * include the flag SPP_PMTUD_DISABLE for this field to have any
+         * effect).
+         */
+        if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) {
                 if (trans) {
                         trans->pathmtu = params->spp_pathmtu;
                         sctp_assoc_sync_pmtu(asoc);
@@ -2135,7 +2161,11 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
                 }
         }
 
-        if (params->spp_sackdelay) {
+        /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
+         * value of this field is ignored.  Note also that a value of zero
+         * indicates the current setting should be left unchanged.
+         */
+        if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) {
                 if (trans) {
                         trans->sackdelay =
                                 msecs_to_jiffies(params->spp_sackdelay);
@@ -2163,7 +2193,11 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
                 }
         }
 
-        if (params->spp_pathmaxrxt) {
+        /* Note that unless the spp_flag is set to SPP_PMTUD_ENABLE the value
+         * of this field is ignored.  Note also that a value of zero
+         * indicates the current setting should be left unchanged.
+         */
+        if ((params->spp_flags & SPP_PMTUD_ENABLE) && params->spp_pathmaxrxt) {
                 if (trans) {
                         trans->pathmaxrxt = params->spp_pathmaxrxt;
                 } else if (asoc) {
@@ -2255,7 +2289,7 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
         return 0;
 }
 
-/* 7.1.24. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
+/* 7.1.23. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
  *
  *   This options will get or set the delayed ack timer.  The time is set
  *   in milliseconds.  If the assoc_id is 0, then this sets or gets the
@@ -2792,6 +2826,102 @@ static int sctp_setsockopt_context(struct sock *sk, char __user *optval,
         return 0;
 }
 
+/*
+ * 7.1.24.  Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
+ *
+ * This options will at a minimum specify if the implementation is doing
+ * fragmented interleave.  Fragmented interleave, for a one to many
+ * socket, is when subsequent calls to receive a message may return
+ * parts of messages from different associations.  Some implementations
+ * may allow you to turn this value on or off.  If so, when turned off,
+ * no fragment interleave will occur (which will cause a head of line
+ * blocking amongst multiple associations sharing the same one to many
+ * socket).  When this option is turned on, then each receive call may
+ * come from a different association (thus the user must receive data
+ * with the extended calls (e.g. sctp_recvmsg) to keep track of which
+ * association each receive belongs to.
+ *
+ * This option takes a boolean value.  A non-zero value indicates that
+ * fragmented interleave is on.  A value of zero indicates that
+ * fragmented interleave is off.
+ *
+ * Note that it is important that an implementation that allows this
+ * option to be turned on, have it off by default.  Otherwise an unaware
+ * application using the one to many model may become confused and act
+ * incorrectly.
+ */
+static int sctp_setsockopt_fragment_interleave(struct sock *sk,
+                                               char __user *optval,
+                                               int optlen)
+{
+        int val;
+
+        if (optlen != sizeof(int))
+                return -EINVAL;
+        if (get_user(val, (int __user *)optval))
+                return -EFAULT;
+
+        sctp_sk(sk)->frag_interleave = (val == 0) ? 0 : 1;
+
+        return 0;
+}
+
+/*
+ * 7.1.25.  Set or Get the sctp partial delivery point
+ *       (SCTP_PARTIAL_DELIVERY_POINT)
+ * This option will set or get the SCTP partial delivery point.  This
+ * point is the size of a message where the partial delivery API will be
+ * invoked to help free up rwnd space for the peer.  Setting this to a
+ * lower value will cause partial delivery's to happen more often.  The
+ * calls argument is an integer that sets or gets the partial delivery
+ * point.
+ */
+static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
+                                                  char __user *optval,
+                                                  int optlen)
+{
+        u32 val;
+
+        if (optlen != sizeof(u32))
+                return -EINVAL;
+        if (get_user(val, (int __user *)optval))
+                return -EFAULT;
+
+        sctp_sk(sk)->pd_point = val;
+
+        return 0; /* is this the right error code? */
+}
+
+/*
+ * 7.1.28.  Set or Get the maximum burst (SCTP_MAX_BURST)
+ *
+ * This option will allow a user to change the maximum burst of packets
+ * that can be emitted by this association.  Note that the default value
+ * is 4, and some implementations may restrict this setting so that it
+ * can only be lowered.
+ *
+ * NOTE: This text doesn't seem right.  Do this on a socket basis with
+ * future associations inheriting the socket value.
+ */
+static int sctp_setsockopt_maxburst(struct sock *sk,
+                                    char __user *optval,
+                                    int optlen)
+{
+        int val;
+
+        if (optlen != sizeof(int))
+                return -EINVAL;
+        if (get_user(val, (int __user *)optval))
+                return -EFAULT;
+
+        if (val < 0)
+                return -EINVAL;
+
+        sctp_sk(sk)->max_burst = val;
+
+        return 0;
+}
+
 /* API 6.2 setsockopt(), getsockopt()
  *
  * Applications use setsockopt() and getsockopt() to set or retrieve
@@ -2871,6 +3001,9 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
         case SCTP_DELAYED_ACK_TIME:
                 retval = sctp_setsockopt_delayed_ack_time(sk, optval, optlen);
                 break;
+        case SCTP_PARTIAL_DELIVERY_POINT:
+                retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen);
+                break;
 
         case SCTP_INITMSG:
                 retval = sctp_setsockopt_initmsg(sk, optval, optlen);
@@ -2906,11 +3039,16 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
         case SCTP_CONTEXT:
                 retval = sctp_setsockopt_context(sk, optval, optlen);
                 break;
-
+        case SCTP_FRAGMENT_INTERLEAVE:
+                retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
+                break;
+        case SCTP_MAX_BURST:
+                retval = sctp_setsockopt_maxburst(sk, optval, optlen);
+                break;
         default:
                 retval = -ENOPROTOOPT;
                 break;
-        };
+        }
 
         sctp_release_sock(sk);
 
@@ -3066,6 +3204,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
         sp->default_timetolive = 0;
 
         sp->default_rcv_context = 0;
+        sp->max_burst = sctp_max_burst;
 
         /* Initialize default setup parameters. These parameters
          * can be modified with the SCTP_INITMSG socket option or
@@ -3134,8 +3273,9 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
         sp->pf = sctp_get_pf_specific(sk->sk_family);
 
         /* Control variables for partial data delivery. */
-        sp->pd_mode           = 0;
+        atomic_set(&sp->pd_mode, 0);
         skb_queue_head_init(&sp->pd_lobby);
+        sp->frag_interleave = 0;
 
         /* Create a per socket endpoint structure.  Even if we
          * change the data structure relationships, this may still
@@ -3642,7 +3782,7 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
         return 0;
 }
 
-/* 7.1.24. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
+/* 7.1.23. Delayed Ack Timer (SCTP_DELAYED_ACK_TIME)
  *
  *   This options will get or set the delayed ack timer.  The time is set
  *   in milliseconds.  If the assoc_id is 0, then this sets or gets the
@@ -4536,6 +4676,77 @@ static int sctp_getsockopt_maxseg(struct sock *sk, int len,
         return 0;
 }
 
+/*
+ * 7.1.24.  Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
+ * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
+ */
+static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
+                                               char __user *optval, int __user *optlen)
+{
+        int val;
+
+        if (len < sizeof(int))
+                return -EINVAL;
+
+        len = sizeof(int);
+
+        val = sctp_sk(sk)->frag_interleave;
+        if (put_user(len, optlen))
+                return -EFAULT;
+        if (copy_to_user(optval, &val, len))
+                return -EFAULT;
+
+        return 0;
+}
+
+/*
+ * 7.1.25.  Set or Get the sctp partial delivery point
+ * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
+ */
+static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
+                                                  char __user *optval,
+                                                  int __user *optlen)
+{
+        u32 val;
+
+        if (len < sizeof(u32))
+                return -EINVAL;
+
+        len = sizeof(u32);
+
+        val = sctp_sk(sk)->pd_point;
+        if (put_user(len, optlen))
+                return -EFAULT;
+        if (copy_to_user(optval, &val, len))
+                return -EFAULT;
+
+        return -ENOTSUPP;
+}
+
+/*
+ * 7.1.28.  Set or Get the maximum burst (SCTP_MAX_BURST)
+ * (chapter and verse is quoted at sctp_setsockopt_maxburst())
+ */
+static int sctp_getsockopt_maxburst(struct sock *sk, int len,
+                                    char __user *optval,
+                                    int __user *optlen)
+{
+        int val;
+
+        if (len < sizeof(int))
+                return -EINVAL;
+
+        len = sizeof(int);
+
+        val = sctp_sk(sk)->max_burst;
+        if (put_user(len, optlen))
+                return -EFAULT;
+        if (copy_to_user(optval, &val, len))
+                return -EFAULT;
+
+        return -ENOTSUPP;
+}
+
 SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
                                 char __user *optval, int __user *optlen)
 {
@@ -4648,10 +4859,21 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
         case SCTP_CONTEXT:
                 retval = sctp_getsockopt_context(sk, len, optval, optlen);
                 break;
+        case SCTP_FRAGMENT_INTERLEAVE:
+                retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
+                                                             optlen);
+                break;
+        case SCTP_PARTIAL_DELIVERY_POINT:
+                retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
+                                                                optlen);
+                break;
+        case SCTP_MAX_BURST:
+                retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
+                break;
         default:
                 retval = -ENOPROTOOPT;
                 break;
-        };
+        }
 
         sctp_release_sock(sk);
         return retval;
@@ -4976,7 +5198,8 @@ int sctp_inet_listen(struct socket *sock, int backlog)
                 break;
         default:
                 break;
-        };
+        }
+
         if (err)
                 goto cleanup;
 
@@ -5239,7 +5462,7 @@ SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *msg,
 
                 default:
                         return -EINVAL;
-                };
+                }
         }
         return 0;
 }
@@ -5742,9 +5965,9 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
          * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
          */
         skb_queue_head_init(&newsp->pd_lobby);
-        sctp_sk(newsk)->pd_mode = assoc->ulpq.pd_mode;
+        atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
 
-        if (sctp_sk(oldsk)->pd_mode) {
+        if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
                 struct sk_buff_head *queue;
 
                 /* Decide which queue to move pd_lobby skbs to. */
@@ -5770,7 +5993,7 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
                  * delivery to finish.
                  */
                 if (assoc->ulpq.pd_mode)
-                        sctp_clear_pd(oldsk);
+                        sctp_clear_pd(oldsk, NULL);
 
         }