diff options
| -rw-r--r-- | include/linux/sysctl.h | 1 | ||||
| -rw-r--r-- | include/net/sctp/structs.h | 16 | ||||
| -rw-r--r-- | net/sctp/associola.c | 9 | ||||
| -rw-r--r-- | net/sctp/endpointola.c | 3 | ||||
| -rw-r--r-- | net/sctp/input.c | 20 | ||||
| -rw-r--r-- | net/sctp/protocol.c | 3 | ||||
| -rw-r--r-- | net/sctp/sm_statefuns.c | 22 | ||||
| -rw-r--r-- | net/sctp/socket.c | 4 | ||||
| -rw-r--r-- | net/sctp/sysctl.c | 8 | ||||
| -rw-r--r-- | net/sctp/ulpevent.c | 24 |
10 files changed, 71 insertions, 39 deletions
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index ab2791b3189..64f203c4537 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -715,6 +715,7 @@ enum { NET_SCTP_PRSCTP_ENABLE = 14, NET_SCTP_SNDBUF_POLICY = 15, NET_SCTP_SACK_TIMEOUT = 16, + NET_SCTP_RCVBUF_POLICY = 17, }; /* /proc/sys/net/bridge */ diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 2aad4468797..8e7794ee27f 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -161,6 +161,13 @@ extern struct sctp_globals { */ int sndbuf_policy; + /* + * Policy for preforming sctp/socket accounting + * 0 - do socket level accounting, all assocs share sk_rcvbuf + * 1 - do sctp accounting, each asoc may use sk_rcvbuf bytes + */ + int rcvbuf_policy; + /* Delayed SACK timeout 200ms default*/ int sack_timeout; @@ -218,6 +225,7 @@ extern struct sctp_globals { #define sctp_cookie_preserve_enable (sctp_globals.cookie_preserve_enable) #define sctp_max_retrans_association (sctp_globals.max_retrans_association) #define sctp_sndbuf_policy (sctp_globals.sndbuf_policy) +#define sctp_rcvbuf_policy (sctp_globals.rcvbuf_policy) #define sctp_max_retrans_path (sctp_globals.max_retrans_path) #define sctp_max_retrans_init (sctp_globals.max_retrans_init) #define sctp_sack_timeout (sctp_globals.sack_timeout) @@ -1224,6 +1232,9 @@ struct sctp_endpoint { /* sendbuf acct. policy. */ __u32 sndbuf_policy; + + /* rcvbuf acct. policy. */ + __u32 rcvbuf_policy; }; /* Recover the outter endpoint structure. */ @@ -1550,6 +1561,11 @@ struct sctp_association { */ int sndbuf_used; + /* This is the amount of memory that this association has allocated + * in the receive path at any given time. + */ + atomic_t rmem_alloc; + /* This is the wait queue head for send requests waiting on * the association sndbuf space. */ diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 5f07ddb1955..dec68a60477 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -177,10 +177,10 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a * RFC 6 - A SCTP receiver MUST be able to receive a minimum of * 1500 bytes in one SCTP packet. */ - if (sk->sk_rcvbuf < SCTP_DEFAULT_MINWINDOW) + if ((sk->sk_rcvbuf/2) < SCTP_DEFAULT_MINWINDOW) asoc->rwnd = SCTP_DEFAULT_MINWINDOW; else - asoc->rwnd = sk->sk_rcvbuf; + asoc->rwnd = sk->sk_rcvbuf/2; asoc->a_rwnd = asoc->rwnd; @@ -192,6 +192,9 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a /* Set the sndbuf size for transmit. */ asoc->sndbuf_used = 0; + /* Initialize the receive memory counter */ + atomic_set(&asoc->rmem_alloc, 0); + init_waitqueue_head(&asoc->wait); asoc->c.my_vtag = sctp_generate_tag(ep); @@ -400,6 +403,8 @@ static void sctp_association_destroy(struct sctp_association *asoc) spin_unlock_bh(&sctp_assocs_id_lock); } + BUG_TRAP(!atomic_read(&asoc->rmem_alloc)); + if (asoc->base.malloced) { kfree(asoc); SCTP_DBG_OBJCNT_DEC(assoc); diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c index 0df76897f56..67bd53070ee 100644 --- a/net/sctp/endpointola.c +++ b/net/sctp/endpointola.c @@ -104,6 +104,9 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep, sk->sk_write_space = sctp_write_space; sock_set_flag(sk, SOCK_USE_WRITE_QUEUE); + /* Get the receive buffer policy for this endpoint */ + ep->rcvbuf_policy = sctp_rcvbuf_policy; + /* Initialize the secret key used with cookie. */ get_random_bytes(&ep->secret_key[0], SCTP_SECRET_SIZE); ep->last_key = ep->current_key = 0; diff --git a/net/sctp/input.c b/net/sctp/input.c index 28f32243397..b24ff2c1aef 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -100,21 +100,6 @@ static inline int sctp_rcv_checksum(struct sk_buff *skb) return 0; } -/* The free routine for skbuffs that sctp receives */ -static void sctp_rfree(struct sk_buff *skb) -{ - atomic_sub(sizeof(struct sctp_chunk),&skb->sk->sk_rmem_alloc); - sock_rfree(skb); -} - -/* The ownership wrapper routine to do receive buffer accounting */ -static void sctp_rcv_set_owner_r(struct sk_buff *skb, struct sock *sk) -{ - skb_set_owner_r(skb,sk); - skb->destructor = sctp_rfree; - atomic_add(sizeof(struct sctp_chunk),&sk->sk_rmem_alloc); -} - struct sctp_input_cb { union { struct inet_skb_parm h4; @@ -217,9 +202,6 @@ int sctp_rcv(struct sk_buff *skb) rcvr = &ep->base; } - if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) - goto discard_release; - /* * RFC 2960, 8.4 - Handle "Out of the blue" Packets. * An SCTP packet is called an "out of the blue" (OOTB) @@ -256,8 +238,6 @@ int sctp_rcv(struct sk_buff *skb) } SCTP_INPUT_CB(skb)->chunk = chunk; - sctp_rcv_set_owner_r(skb,sk); - /* Remember what endpoint is to handle this packet. */ chunk->rcvr = rcvr; diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index dc9dff396fa..f775d78aa59 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1050,6 +1050,9 @@ SCTP_STATIC __init int sctp_init(void) /* Sendbuffer growth - do per-socket accounting */ sctp_sndbuf_policy = 0; + /* Rcvbuffer growth - do per-socket accounting */ + sctp_rcvbuf_policy = 0; + /* HB.interval - 30 seconds */ sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT; diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 505c7de10c5..475bfb4972d 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -5160,6 +5160,8 @@ static int sctp_eat_data(const struct sctp_association *asoc, sctp_verb_t deliver; int tmp; __u32 tsn; + int account_value; + struct sock *sk = asoc->base.sk; data_hdr = chunk->subh.data_hdr = (sctp_datahdr_t *)chunk->skb->data; skb_pull(chunk->skb, sizeof(sctp_datahdr_t)); @@ -5169,6 +5171,26 @@ static int sctp_eat_data(const struct sctp_association *asoc, /* ASSERT: Now skb->data is really the user data. */ + /* + * if we are established, and we have used up our receive + * buffer memory, drop the frame + */ + if (asoc->state == SCTP_STATE_ESTABLISHED) { + /* + * If the receive buffer policy is 1, then each + * association can allocate up to sk_rcvbuf bytes + * otherwise, all the associations in aggregate + * may allocate up to sk_rcvbuf bytes + */ + if (asoc->ep->rcvbuf_policy) + account_value = atomic_read(&asoc->rmem_alloc); + else + account_value = atomic_read(&sk->sk_rmem_alloc); + + if (account_value > sk->sk_rcvbuf) + return SCTP_IERROR_IGNORE_TSN; + } + /* Process ECN based congestion. * * Since the chunk structure is reused for all chunks within diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 4d1b8d8904c..abab81f3818 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -5114,8 +5114,10 @@ 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); __skb_unlink(skb, &oldsk->sk_receive_queue); __skb_queue_tail(&newsk->sk_receive_queue, skb); + skb_set_owner_r(skb, newsk); } } @@ -5143,8 +5145,10 @@ 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); __skb_unlink(skb, &oldsp->pd_lobby); __skb_queue_tail(queue, skb); + skb_set_owner_r(skb, newsk); } } diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c index 75b28dd634f..fcd7096c953 100644 --- a/net/sctp/sysctl.c +++ b/net/sctp/sysctl.c @@ -121,6 +121,14 @@ static ctl_table sctp_table[] = { .proc_handler = &proc_dointvec }, { + .ctl_name = NET_SCTP_RCVBUF_POLICY, + .procname = "rcvbuf_policy", + .data = &sctp_rcvbuf_policy, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec + }, + { .ctl_name = NET_SCTP_PATH_MAX_RETRANS, .procname = "path_max_retrans", .data = &sctp_max_retrans_path, diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c index e049f41faa4..ba97f974f57 100644 --- a/net/sctp/ulpevent.c +++ b/net/sctp/ulpevent.c @@ -52,19 +52,6 @@ static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event, struct sctp_association *asoc); static void sctp_ulpevent_release_data(struct sctp_ulpevent *event); -/* Stub skb destructor. */ -static void sctp_stub_rfree(struct sk_buff *skb) -{ -/* WARNING: This function is just a warning not to use the - * skb destructor. If the skb is shared, we may get the destructor - * callback on some processor that does not own the sock_lock. This - * was occuring with PACKET socket applications that were monitoring - * our skbs. We can't take the sock_lock, because we can't risk - * recursing if we do really own the sock lock. Instead, do all - * of our rwnd manipulation while we own the sock_lock outright. - */ -} - /* Initialize an ULP event from an given skb. */ SCTP_STATIC void sctp_ulpevent_init(struct sctp_ulpevent *event, int msg_flags) { @@ -111,15 +98,19 @@ static inline void sctp_ulpevent_set_owner(struct sctp_ulpevent *event, */ sctp_association_hold((struct sctp_association *)asoc); skb = sctp_event2skb(event); - skb->sk = asoc->base.sk; event->asoc = (struct sctp_association *)asoc; - skb->destructor = sctp_stub_rfree; + atomic_add(skb->truesize, &event->asoc->rmem_alloc); + 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) { - sctp_association_put(event->asoc); + struct sctp_association *asoc = event->asoc; + struct sk_buff *skb = sctp_event2skb(event); + + atomic_sub(skb->truesize, &asoc->rmem_alloc); + sctp_association_put(asoc); } /* Create and initialize an SCTP_ASSOC_CHANGE event. @@ -922,7 +913,6 @@ done: /* Free a ulpevent that has an owner. It includes releasing the reference * to the owner, updating the rwnd in case of a DATA event and freeing the * skb. - * See comments in sctp_stub_rfree(). */ void sctp_ulpevent_free(struct sctp_ulpevent *event) { |