diff options
| -rw-r--r-- | include/net/sctp/sctp.h | 14 | ||||
| -rw-r--r-- | include/net/sctp/ulpevent.h | 1 | ||||
| -rw-r--r-- | net/sctp/socket.c | 22 | ||||
| -rw-r--r-- | net/sctp/ulpevent.c | 25 | ||||
| -rw-r--r-- | net/sctp/ulpqueue.c | 2 |
5 files changed, 49 insertions, 15 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index ee68a312407..764e3af5be9 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -139,6 +139,7 @@ int sctp_inet_listen(struct socket *sock, int backlog); void sctp_write_space(struct sock *sk); unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait); +void sctp_sock_rfree(struct sk_buff *skb); /* * sctp/primitive.c @@ -444,6 +445,19 @@ static inline struct list_head *sctp_list_dequeue(struct list_head *list) return result; } +/* SCTP version of skb_set_owner_r. We need this one because + * of the way we have to do receive buffer accounting on bundled + * chunks. + */ +static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk) +{ + struct sctp_ulpevent *event = sctp_skb2event(skb); + + skb->sk = sk; + skb->destructor = sctp_sock_rfree; + atomic_add(event->rmem_len, &sk->sk_rmem_alloc); +} + /* Tests if the list has one and only one entry. */ static inline int sctp_list_single_entry(struct list_head *head) { diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h index 6c40cfc4832..1a4ddc1ec7d 100644 --- a/include/net/sctp/ulpevent.h +++ b/include/net/sctp/ulpevent.h @@ -63,6 +63,7 @@ struct sctp_ulpevent { __u32 cumtsn; int msg_flags; int iif; + unsigned int rmem_len; }; /* Retrieve the skb this event sits inside of. */ diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 3fe906d6506..9deec439118 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -5362,6 +5362,20 @@ static void sctp_wfree(struct sk_buff *skb) sctp_association_put(asoc); } +/* Do accounting for the receive space on the socket. + * Accounting for the association is done in ulpevent.c + * We set this as a destructor for the cloned data skbs so that + * accounting is done at the correct time. + */ +void sctp_sock_rfree(struct sk_buff *skb) +{ + struct sock *sk = skb->sk; + struct sctp_ulpevent *event = sctp_skb2event(skb); + + atomic_sub(event->rmem_len, &sk->sk_rmem_alloc); +} + + /* Helper function to wait for space in the sndbuf. */ static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, size_t msg_len) @@ -5634,10 +5648,10 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) { event = sctp_skb2event(skb); if (event->asoc == assoc) { - sock_rfree(skb); + sctp_sock_rfree(skb); __skb_unlink(skb, &oldsk->sk_receive_queue); __skb_queue_tail(&newsk->sk_receive_queue, skb); - skb_set_owner_r(skb, newsk); + sctp_skb_set_owner_r(skb, newsk); } } @@ -5665,10 +5679,10 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) { event = sctp_skb2event(skb); if (event->asoc == assoc) { - sock_rfree(skb); + sctp_sock_rfree(skb); __skb_unlink(skb, &oldsp->pd_lobby); __skb_queue_tail(queue, skb); - skb_set_owner_r(skb, newsk); + sctp_skb_set_owner_r(skb, newsk); } } diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c index ee236784a6b..a015283a908 100644 --- a/net/sctp/ulpevent.c +++ b/net/sctp/ulpevent.c @@ -55,10 +55,13 @@ static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event); /* Initialize an ULP event from an given skb. */ -SCTP_STATIC void sctp_ulpevent_init(struct sctp_ulpevent *event, int msg_flags) +SCTP_STATIC void sctp_ulpevent_init(struct sctp_ulpevent *event, + int msg_flags, + unsigned int len) { memset(event, 0, sizeof(struct sctp_ulpevent)); event->msg_flags = msg_flags; + event->rmem_len = len; } /* Create a new sctp_ulpevent. */ @@ -73,7 +76,7 @@ SCTP_STATIC struct sctp_ulpevent *sctp_ulpevent_new(int size, int msg_flags, goto fail; event = sctp_skb2event(skb); - sctp_ulpevent_init(event, msg_flags); + sctp_ulpevent_init(event, msg_flags, skb->truesize); return event; @@ -101,17 +104,16 @@ static inline void sctp_ulpevent_set_owner(struct sctp_ulpevent *event, sctp_association_hold((struct sctp_association *)asoc); skb = sctp_event2skb(event); event->asoc = (struct sctp_association *)asoc; - atomic_add(skb->truesize, &event->asoc->rmem_alloc); - skb_set_owner_r(skb, asoc->base.sk); + atomic_add(event->rmem_len, &event->asoc->rmem_alloc); + sctp_skb_set_owner_r(skb, asoc->base.sk); } /* A simple destructor to give up the reference to the association. */ static inline void sctp_ulpevent_release_owner(struct sctp_ulpevent *event) { struct sctp_association *asoc = event->asoc; - struct sk_buff *skb = sctp_event2skb(event); - atomic_sub(skb->truesize, &asoc->rmem_alloc); + atomic_sub(event->rmem_len, &asoc->rmem_alloc); sctp_association_put(asoc); } @@ -372,7 +374,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_remote_error( /* Embed the event fields inside the cloned skb. */ event = sctp_skb2event(skb); - sctp_ulpevent_init(event, MSG_NOTIFICATION); + sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize); sre = (struct sctp_remote_error *) skb_push(skb, sizeof(struct sctp_remote_error)); @@ -464,7 +466,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_send_failed( /* Embed the event fields inside the cloned skb. */ event = sctp_skb2event(skb); - sctp_ulpevent_init(event, MSG_NOTIFICATION); + sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize); ssf = (struct sctp_send_failed *) skb_push(skb, sizeof(struct sctp_send_failed)); @@ -682,8 +684,11 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc, /* Embed the event fields inside the cloned skb. */ event = sctp_skb2event(skb); - /* Initialize event with flags 0. */ - sctp_ulpevent_init(event, 0); + /* Initialize event with flags 0 and correct length + * Since this is a clone of the original skb, only account for + * the data of this chunk as other chunks will be accounted separately. + */ + sctp_ulpevent_init(event, 0, skb->len + sizeof(struct sk_buff)); sctp_ulpevent_receive_data(event, asoc); diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c index 575e556aeb3..e1d144275f9 100644 --- a/net/sctp/ulpqueue.c +++ b/net/sctp/ulpqueue.c @@ -309,7 +309,7 @@ static struct sctp_ulpevent *sctp_make_reassembled_event(struct sk_buff_head *qu if (!new) return NULL; /* try again later */ - new->sk = f_frag->sk; + sctp_skb_set_owner_r(new, f_frag->sk); skb_shinfo(new)->frag_list = pos; } else |