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authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-05 18:44:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-05 18:44:59 -0800
commit15b0669072127f282896b3bef2e9df4ec5d7264f (patch)
tree8480e09bbc7c26cd5c9ef048b734664cb6fe76be /net
parentc155b914651753f843445d2f860bc00137df5d52 (diff)
parent3537d54c0c39de5738bba8d19f128478b0b96a71 (diff)
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (44 commits) qlge: Fix sparse warnings for tx ring indexes. qlge: Fix sparse warning regarding rx buffer queues. qlge: Fix sparse endian warning in ql_hw_csum_setup(). qlge: Fix sparse endian warning for inbound packet control block flags. qlge: Fix sparse warnings for byte swapping in qlge_ethool.c myri10ge: print MAC and serial number on probe failure pkt_sched: cls_u32: Fix locking in u32_change() iucv: fix cpu hotplug af_iucv: Free iucv path/socket in path_pending callback af_iucv: avoid left over IUCV connections from failing connects af_iucv: New error return codes for connect() net/ehea: bitops work on unsigned longs Revert "net: Fix for initial link state in 2.6.28" tcp: Kill extraneous SPLICE_F_NONBLOCK checks. tcp: don't mask EOF and socket errors on nonblocking splice receive dccp: Integrate the TFRC library with DCCP dccp: Clean up ccid.c after integration of CCID plugins dccp: Lockless integration of CCID congestion-control plugins qeth: get rid of extra argument after printk to dev_* conversion qeth: No large send using EDDP for HiperSockets. ...
Diffstat (limited to 'net')
-rw-r--r--net/can/bcm.c208
-rw-r--r--net/core/dev.c93
-rw-r--r--net/core/skbuff.c15
-rw-r--r--net/dcb/dcbnl.c14
-rw-r--r--net/dccp/Kconfig4
-rw-r--r--net/dccp/Makefile15
-rw-r--r--net/dccp/ackvec.h49
-rw-r--r--net/dccp/ccid.c254
-rw-r--r--net/dccp/ccid.h14
-rw-r--r--net/dccp/ccids/Kconfig79
-rw-r--r--net/dccp/ccids/Makefile9
-rw-r--r--net/dccp/ccids/ccid2.c22
-rw-r--r--net/dccp/ccids/ccid3.c23
-rw-r--r--net/dccp/ccids/lib/Makefile3
-rw-r--r--net/dccp/ccids/lib/loss_interval.c3
-rw-r--r--net/dccp/ccids/lib/packet_history.c9
-rw-r--r--net/dccp/ccids/lib/tfrc.c19
-rw-r--r--net/dccp/ccids/lib/tfrc.h11
-rw-r--r--net/dccp/ccids/lib/tfrc_equation.c4
-rw-r--r--net/dccp/dccp.h2
-rw-r--r--net/dccp/feat.c6
-rw-r--r--net/dccp/input.c2
-rw-r--r--net/dccp/proto.c7
-rw-r--r--net/ipv4/tcp.c9
-rw-r--r--net/ipv6/ipv6_sockglue.c2
-rw-r--r--net/ipv6/route.c52
-rw-r--r--net/iucv/af_iucv.c28
-rw-r--r--net/iucv/iucv.c18
-rw-r--r--net/rfkill/rfkill.c4
-rw-r--r--net/sched/cls_u32.c3
30 files changed, 488 insertions, 493 deletions
diff --git a/net/can/bcm.c b/net/can/bcm.c
index da0d426c0ce..6248ae2502c 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -70,7 +70,7 @@
#define CAN_BCM_VERSION CAN_VERSION
static __initdata const char banner[] = KERN_INFO
- "can: broadcast manager protocol (rev " CAN_BCM_VERSION ")\n";
+ "can: broadcast manager protocol (rev " CAN_BCM_VERSION " t)\n";
MODULE_DESCRIPTION("PF_CAN broadcast manager protocol");
MODULE_LICENSE("Dual BSD/GPL");
@@ -90,6 +90,7 @@ struct bcm_op {
unsigned long frames_abs, frames_filtered;
struct timeval ival1, ival2;
struct hrtimer timer, thrtimer;
+ struct tasklet_struct tsklet, thrtsklet;
ktime_t rx_stamp, kt_ival1, kt_ival2, kt_lastmsg;
int rx_ifindex;
int count;
@@ -341,6 +342,23 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
}
}
+static void bcm_tx_timeout_tsklet(unsigned long data)
+{
+ struct bcm_op *op = (struct bcm_op *)data;
+ struct bcm_msg_head msg_head;
+
+ /* create notification to user */
+ msg_head.opcode = TX_EXPIRED;
+ msg_head.flags = op->flags;
+ msg_head.count = op->count;
+ msg_head.ival1 = op->ival1;
+ msg_head.ival2 = op->ival2;
+ msg_head.can_id = op->can_id;
+ msg_head.nframes = 0;
+
+ bcm_send_to_user(op, &msg_head, NULL, 0);
+}
+
/*
* bcm_tx_timeout_handler - performes cyclic CAN frame transmissions
*/
@@ -352,20 +370,8 @@ static enum hrtimer_restart bcm_tx_timeout_handler(struct hrtimer *hrtimer)
if (op->kt_ival1.tv64 && (op->count > 0)) {
op->count--;
- if (!op->count && (op->flags & TX_COUNTEVT)) {
- struct bcm_msg_head msg_head;
-
- /* create notification to user */
- msg_head.opcode = TX_EXPIRED;
- msg_head.flags = op->flags;
- msg_head.count = op->count;
- msg_head.ival1 = op->ival1;
- msg_head.ival2 = op->ival2;
- msg_head.can_id = op->can_id;
- msg_head.nframes = 0;
-
- bcm_send_to_user(op, &msg_head, NULL, 0);
- }
+ if (!op->count && (op->flags & TX_COUNTEVT))
+ tasklet_schedule(&op->tsklet);
}
if (op->kt_ival1.tv64 && (op->count > 0)) {
@@ -402,6 +408,9 @@ static void bcm_rx_changed(struct bcm_op *op, struct can_frame *data)
if (op->frames_filtered > ULONG_MAX/100)
op->frames_filtered = op->frames_abs = 0;
+ /* this element is not throttled anymore */
+ data->can_dlc &= (BCM_CAN_DLC_MASK|RX_RECV);
+
head.opcode = RX_CHANGED;
head.flags = op->flags;
head.count = op->count;
@@ -420,37 +429,32 @@ static void bcm_rx_changed(struct bcm_op *op, struct can_frame *data)
*/
static void bcm_rx_update_and_send(struct bcm_op *op,
struct can_frame *lastdata,
- struct can_frame *rxdata)
+ const struct can_frame *rxdata)
{
memcpy(lastdata, rxdata, CFSIZ);
- /* mark as used */
- lastdata->can_dlc |= RX_RECV;
+ /* mark as used and throttled by default */
+ lastdata->can_dlc |= (RX_RECV|RX_THR);
- /* throtteling mode inactive OR data update already on the run ? */
- if (!op->kt_ival2.tv64 || hrtimer_callback_running(&op->thrtimer)) {
+ /* throtteling mode inactive ? */
+ if (!op->kt_ival2.tv64) {
/* send RX_CHANGED to the user immediately */
- bcm_rx_changed(op, rxdata);
+ bcm_rx_changed(op, lastdata);
return;
}
- if (hrtimer_active(&op->thrtimer)) {
- /* mark as 'throttled' */
- lastdata->can_dlc |= RX_THR;
+ /* with active throttling timer we are just done here */
+ if (hrtimer_active(&op->thrtimer))
return;
- }
- if (!op->kt_lastmsg.tv64) {
- /* send first RX_CHANGED to the user immediately */
- bcm_rx_changed(op, rxdata);
- op->kt_lastmsg = ktime_get();
- return;
- }
+ /* first receiption with enabled throttling mode */
+ if (!op->kt_lastmsg.tv64)
+ goto rx_changed_settime;
+ /* got a second frame inside a potential throttle period? */
if (ktime_us_delta(ktime_get(), op->kt_lastmsg) <
ktime_to_us(op->kt_ival2)) {
- /* mark as 'throttled' and start timer */
- lastdata->can_dlc |= RX_THR;
+ /* do not send the saved data - only start throttle timer */
hrtimer_start(&op->thrtimer,
ktime_add(op->kt_lastmsg, op->kt_ival2),
HRTIMER_MODE_ABS);
@@ -458,7 +462,8 @@ static void bcm_rx_update_and_send(struct bcm_op *op,
}
/* the gap was that big, that throttling was not needed here */
- bcm_rx_changed(op, rxdata);
+rx_changed_settime:
+ bcm_rx_changed(op, lastdata);
op->kt_lastmsg = ktime_get();
}
@@ -467,7 +472,7 @@ static void bcm_rx_update_and_send(struct bcm_op *op,
* received data stored in op->last_frames[]
*/
static void bcm_rx_cmp_to_index(struct bcm_op *op, int index,
- struct can_frame *rxdata)
+ const struct can_frame *rxdata)
{
/*
* no one uses the MSBs of can_dlc for comparation,
@@ -511,14 +516,12 @@ static void bcm_rx_starttimer(struct bcm_op *op)
hrtimer_start(&op->timer, op->kt_ival1, HRTIMER_MODE_REL);
}
-/*
- * bcm_rx_timeout_handler - when the (cyclic) CAN frame receiption timed out
- */
-static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
+static void bcm_rx_timeout_tsklet(unsigned long data)
{
- struct bcm_op *op = container_of(hrtimer, struct bcm_op, timer);
+ struct bcm_op *op = (struct bcm_op *)data;
struct bcm_msg_head msg_head;
+ /* create notification to user */
msg_head.opcode = RX_TIMEOUT;
msg_head.flags = op->flags;
msg_head.count = op->count;
@@ -528,6 +531,17 @@ static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
msg_head.nframes = 0;
bcm_send_to_user(op, &msg_head, NULL, 0);
+}
+
+/*
+ * bcm_rx_timeout_handler - when the (cyclic) CAN frame receiption timed out
+ */
+static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
+{
+ struct bcm_op *op = container_of(hrtimer, struct bcm_op, timer);
+
+ /* schedule before NET_RX_SOFTIRQ */
+ tasklet_hi_schedule(&op->tsklet);
/* no restart of the timer is done here! */
@@ -541,9 +555,25 @@ static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
}
/*
+ * bcm_rx_do_flush - helper for bcm_rx_thr_flush
+ */
+static inline int bcm_rx_do_flush(struct bcm_op *op, int update, int index)
+{
+ if ((op->last_frames) && (op->last_frames[index].can_dlc & RX_THR)) {
+ if (update)
+ bcm_rx_changed(op, &op->last_frames[index]);
+ return 1;
+ }
+ return 0;
+}
+
+/*
* bcm_rx_thr_flush - Check for throttled data and send it to the userspace
+ *
+ * update == 0 : just check if throttled data is available (any irq context)
+ * update == 1 : check and send throttled data to userspace (soft_irq context)
*/
-static int bcm_rx_thr_flush(struct bcm_op *op)
+static int bcm_rx_thr_flush(struct bcm_op *op, int update)
{
int updated = 0;
@@ -551,27 +581,25 @@ static int bcm_rx_thr_flush(struct bcm_op *op)
int i;
/* for MUX filter we start at index 1 */
- for (i = 1; i < op->nframes; i++) {
- if ((op->last_frames) &&
- (op->last_frames[i].can_dlc & RX_THR)) {
- op->last_frames[i].can_dlc &= ~RX_THR;
- bcm_rx_changed(op, &op->last_frames[i]);
- updated++;
- }
- }
+ for (i = 1; i < op->nframes; i++)
+ updated += bcm_rx_do_flush(op, update, i);
} else {
/* for RX_FILTER_ID and simple filter */
- if (op->last_frames && (op->last_frames[0].can_dlc & RX_THR)) {
- op->last_frames[0].can_dlc &= ~RX_THR;
- bcm_rx_changed(op, &op->last_frames[0]);
- updated++;
- }
+ updated += bcm_rx_do_flush(op, update, 0);
}
return updated;
}
+static void bcm_rx_thr_tsklet(unsigned long data)
+{
+ struct bcm_op *op = (struct bcm_op *)data;
+
+ /* push the changed data to the userspace */
+ bcm_rx_thr_flush(op, 1);
+}
+
/*
* bcm_rx_thr_handler - the time for blocked content updates is over now:
* Check for throttled data and send it to the userspace
@@ -580,7 +608,9 @@ static enum hrtimer_restart bcm_rx_thr_handler(struct hrtimer *hrtimer)
{
struct bcm_op *op = container_of(hrtimer, struct bcm_op, thrtimer);
- if (bcm_rx_thr_flush(op)) {
+ tasklet_schedule(&op->thrtsklet);
+
+ if (bcm_rx_thr_flush(op, 0)) {
hrtimer_forward(hrtimer, ktime_get(), op->kt_ival2);
return HRTIMER_RESTART;
} else {
@@ -596,48 +626,38 @@ static enum hrtimer_restart bcm_rx_thr_handler(struct hrtimer *hrtimer)
static void bcm_rx_handler(struct sk_buff *skb, void *data)
{
struct bcm_op *op = (struct bcm_op *)data;
- struct can_frame rxframe;
+ const struct can_frame *rxframe = (struct can_frame *)skb->data;
int i;
/* disable timeout */
hrtimer_cancel(&op->timer);
- if (skb->len == sizeof(rxframe)) {
- memcpy(&rxframe, skb->data, sizeof(rxframe));
- /* save rx timestamp */
- op->rx_stamp = skb->tstamp;
- /* save originator for recvfrom() */
- op->rx_ifindex = skb->dev->ifindex;
- /* update statistics */
- op->frames_abs++;
- kfree_skb(skb);
+ if (op->can_id != rxframe->can_id)
+ goto rx_freeskb;
- } else {
- kfree_skb(skb);
- return;
- }
-
- if (op->can_id != rxframe.can_id)
- return;
+ /* save rx timestamp */
+ op->rx_stamp = skb->tstamp;
+ /* save originator for recvfrom() */
+ op->rx_ifindex = skb->dev->ifindex;
+ /* update statistics */
+ op->frames_abs++;
if (op->flags & RX_RTR_FRAME) {
/* send reply for RTR-request (placed in op->frames[0]) */
bcm_can_tx(op);
- return;
+ goto rx_freeskb;
}
if (op->flags & RX_FILTER_ID) {
/* the easiest case */
- bcm_rx_update_and_send(op, &op->last_frames[0], &rxframe);
- bcm_rx_starttimer(op);
- return;
+ bcm_rx_update_and_send(op, &op->last_frames[0], rxframe);
+ goto rx_freeskb_starttimer;
}
if (op->nframes == 1) {
/* simple compare with index 0 */
- bcm_rx_cmp_to_index(op, 0, &rxframe);
- bcm_rx_starttimer(op);
- return;
+ bcm_rx_cmp_to_index(op, 0, rxframe);
+ goto rx_freeskb_starttimer;
}
if (op->nframes > 1) {
@@ -649,15 +669,19 @@ static void bcm_rx_handler(struct sk_buff *skb, void *data)
*/
for (i = 1; i < op->nframes; i++) {
- if ((GET_U64(&op->frames[0]) & GET_U64(&rxframe)) ==
+ if ((GET_U64(&op->frames[0]) & GET_U64(rxframe)) ==
(GET_U64(&op->frames[0]) &
GET_U64(&op->frames[i]))) {
- bcm_rx_cmp_to_index(op, i, &rxframe);
+ bcm_rx_cmp_to_index(op, i, rxframe);
break;
}
}
- bcm_rx_starttimer(op);
}
+
+rx_freeskb_starttimer:
+ bcm_rx_starttimer(op);
+rx_freeskb:
+ kfree_skb(skb);
}
/*
@@ -681,6 +705,12 @@ static void bcm_remove_op(struct bcm_op *op)
hrtimer_cancel(&op->timer);
hrtimer_cancel(&op->thrtimer);
+ if (op->tsklet.func)
+ tasklet_kill(&op->tsklet);
+
+ if (op->thrtsklet.func)
+ tasklet_kill(&op->thrtsklet);
+
if ((op->frames) && (op->frames != &op->sframe))
kfree(op->frames);
@@ -891,6 +921,10 @@ static int bcm_tx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
hrtimer_init(&op->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
op->timer.function = bcm_tx_timeout_handler;
+ /* initialize tasklet for tx countevent notification */
+ tasklet_init(&op->tsklet, bcm_tx_timeout_tsklet,
+ (unsigned long) op);
+
/* currently unused in tx_ops */
hrtimer_init(&op->thrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
@@ -1054,9 +1088,17 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
hrtimer_init(&op->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
op->timer.function = bcm_rx_timeout_handler;
+ /* initialize tasklet for rx timeout notification */
+ tasklet_init(&op->tsklet, bcm_rx_timeout_tsklet,
+ (unsigned long) op);
+
hrtimer_init(&op->thrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
op->thrtimer.function = bcm_rx_thr_handler;
+ /* initialize tasklet for rx throttle handling */
+ tasklet_init(&op->thrtsklet, bcm_rx_thr_tsklet,
+ (unsigned long) op);
+
/* add this bcm_op to the list of the rx_ops */
list_add(&op->list, &bo->rx_ops);
@@ -1102,7 +1144,7 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
*/
op->kt_lastmsg = ktime_set(0, 0);
hrtimer_cancel(&op->thrtimer);
- bcm_rx_thr_flush(op);
+ bcm_rx_thr_flush(op, 1);
}
if ((op->flags & STARTTIMER) && op->kt_ival1.tv64)
diff --git a/net/core/dev.c b/net/core/dev.c
index 09c66a449da..382df6c09ee 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -132,6 +132,9 @@
/* Instead of increasing this, you should create a hash table. */
#define MAX_GRO_SKBS 8
+/* This should be increased if a protocol with a bigger head is added. */
+#define GRO_MAX_HEAD (MAX_HEADER + 128)
+
/*
* The list of packet types we will receive (as opposed to discard)
* and the routines to invoke.
@@ -2345,7 +2348,7 @@ static int napi_gro_complete(struct sk_buff *skb)
struct list_head *head = &ptype_base[ntohs(type) & PTYPE_HASH_MASK];
int err = -ENOENT;
- if (!skb_shinfo(skb)->frag_list)
+ if (NAPI_GRO_CB(skb)->count == 1)
goto out;
rcu_read_lock();
@@ -2365,6 +2368,7 @@ static int napi_gro_complete(struct sk_buff *skb)
}
out:
+ skb_shinfo(skb)->gso_size = 0;
__skb_push(skb, -skb_network_offset(skb));
return netif_receive_skb(skb);
}
@@ -2383,7 +2387,7 @@ void napi_gro_flush(struct napi_struct *napi)
}
EXPORT_SYMBOL(napi_gro_flush);
-int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
struct sk_buff **pp = NULL;
struct packet_type *ptype;
@@ -2392,6 +2396,7 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
int count = 0;
int same_flow;
int mac_len;
+ int free;
if (!(skb->dev->features & NETIF_F_GRO))
goto normal;
@@ -2408,6 +2413,7 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
skb->mac_len = mac_len;
NAPI_GRO_CB(skb)->same_flow = 0;
NAPI_GRO_CB(skb)->flush = 0;
+ NAPI_GRO_CB(skb)->free = 0;
for (p = napi->gro_list; p; p = p->next) {
count++;
@@ -2427,6 +2433,7 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
goto normal;
same_flow = NAPI_GRO_CB(skb)->same_flow;
+ free = NAPI_GRO_CB(skb)->free;
if (pp) {
struct sk_buff *nskb = *pp;
@@ -2446,17 +2453,91 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
}
NAPI_GRO_CB(skb)->count = 1;
+ skb_shinfo(skb)->gso_size = skb->len;
skb->next = napi->gro_list;
napi->gro_list = skb;
ok:
- return NET_RX_SUCCESS;
+ return free;
normal:
- return netif_receive_skb(skb);
+ return -1;
+}
+
+int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+{
+ switch (__napi_gro_receive(napi, skb)) {
+ case -1:
+ return netif_receive_skb(skb);
+
+ case 1:
+ kfree_skb(skb);
+ break;
+ }
+
+ return NET_RX_SUCCESS;
}
EXPORT_SYMBOL(napi_gro_receive);
+int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info)
+{
+ struct net_device *dev = napi->dev;
+ struct sk_buff *skb = napi->skb;
+ int err = NET_RX_DROP;
+
+ napi->skb = NULL;
+
+ if (!skb) {
+ skb = netdev_alloc_skb(dev, GRO_MAX_HEAD + NET_IP_ALIGN);
+ if (!skb)
+ goto out;
+
+ skb_reserve(skb, NET_IP_ALIGN);
+ }
+
+ BUG_ON(info->nr_frags > MAX_SKB_FRAGS);
+ skb_shinfo(skb)->nr_frags = info->nr_frags;
+ memcpy(skb_shinfo(skb)->frags, info->frags, sizeof(info->frags));
+
+ skb->data_len = info->len;
+ skb->len += info->len;
+ skb->truesize += info->len;
+
+ if (!pskb_may_pull(skb, ETH_HLEN))
+ goto reuse;
+
+ err = NET_RX_SUCCESS;
+
+ skb->protocol = eth_type_trans(skb, dev);
+
+ skb->ip_summed = info->ip_summed;
+ skb->csum = info->csum;
+
+ switch (__napi_gro_receive(napi, skb)) {
+ case -1:
+ return netif_receive_skb(skb);
+
+ case 0:
+ goto out;
+ }
+
+reuse:
+ skb_shinfo(skb)->nr_frags = 0;
+
+ skb->len -= skb->data_len;
+ skb->truesize -= skb->data_len;
+ skb->data_len = 0;
+
+ __skb_pull(skb, skb_headlen(skb));
+ skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
+
+ napi->skb = skb;
+
+out:
+ return err;
+}
+EXPORT_SYMBOL(napi_gro_frags);
+
static int process_backlog(struct napi_struct *napi, int quota)
{
int work = 0;
@@ -2535,11 +2616,12 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
{
INIT_LIST_HEAD(&napi->poll_list);
napi->gro_list = NULL;
+ napi->skb = NULL;
napi->poll = poll;
napi->weight = weight;
list_add(&napi->dev_list, &dev->napi_list);
-#ifdef CONFIG_NETPOLL
napi->dev = dev;
+#ifdef CONFIG_NETPOLL
spin_lock_init(&napi->poll_lock);
napi->poll_owner = -1;
#endif
@@ -2552,6 +2634,7 @@ void netif_napi_del(struct napi_struct *napi)
struct sk_buff *skb, *next;
list_del_init(&napi->dev_list);
+ kfree(napi->skb);
for (skb = napi->gro_list; skb; skb = next) {
next = skb->next;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b8d0abb2643..5110b359c75 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2594,6 +2594,17 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
if (skb_shinfo(p)->frag_list)
goto merge;
+ else if (!skb_headlen(p) && !skb_headlen(skb) &&
+ skb_shinfo(p)->nr_frags + skb_shinfo(skb)->nr_frags <
+ MAX_SKB_FRAGS) {
+ memcpy(skb_shinfo(p)->frags + skb_shinfo(p)->nr_frags,
+ skb_shinfo(skb)->frags,
+ skb_shinfo(skb)->nr_frags * sizeof(skb_frag_t));
+
+ skb_shinfo(p)->nr_frags += skb_shinfo(skb)->nr_frags;
+ NAPI_GRO_CB(skb)->free = 1;
+ goto done;
+ }
headroom = skb_headroom(p);
nskb = netdev_alloc_skb(p->dev, headroom);
@@ -2613,6 +2624,7 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
*NAPI_GRO_CB(nskb) = *NAPI_GRO_CB(p);
skb_shinfo(nskb)->frag_list = p;
+ skb_shinfo(nskb)->gso_size = skb_shinfo(p)->gso_size;
skb_header_release(p);
nskb->prev = p;
@@ -2627,11 +2639,12 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
p = nskb;
merge:
- NAPI_GRO_CB(p)->count++;
p->prev->next = skb;
p->prev = skb;
skb_header_release(skb);
+done:
+ NAPI_GRO_CB(p)->count++;
p->data_len += skb->len;
p->truesize += skb->len;
p->len += skb->len;
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 5dbfe5fdc0d..8379496de82 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -191,7 +191,7 @@ static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
return 0;
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
return ret;
}
@@ -272,7 +272,7 @@ static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
return 0;
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
err_out:
return -EINVAL;
}
@@ -314,7 +314,7 @@ static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
err_out:
return -EINVAL;
}
@@ -380,7 +380,7 @@ static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
return 0;
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
err_out:
return -EINVAL;
}
@@ -458,7 +458,7 @@ static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
return 0;
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
err_out:
return ret;
}
@@ -687,7 +687,7 @@ err_pg:
nla_nest_cancel(dcbnl_skb, pg_nest);
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
err_out:
ret = -EINVAL;
return ret;
@@ -949,7 +949,7 @@ err_bcn:
nla_nest_cancel(dcbnl_skb, bcn_nest);
nlmsg_failure:
err:
- kfree(dcbnl_skb);
+ kfree_skb(dcbnl_skb);
err_out:
ret = -EINVAL;
return ret;
diff --git a/net/dccp/Kconfig b/net/dccp/Kconfig
index 7aa2a7acc7e..ad6dffd9070 100644
--- a/net/dccp/Kconfig
+++ b/net/dccp/Kconfig
@@ -1,7 +1,6 @@
menuconfig IP_DCCP
tristate "The DCCP Protocol (EXPERIMENTAL)"
depends on INET && EXPERIMENTAL
- select IP_DCCP_CCID2
---help---
Datagram Congestion Control Protocol (RFC 4340)
@@ -25,9 +24,6 @@ config INET_DCCP_DIAG
def_tristate y if (IP_DCCP = y && INET_DIAG = y)
def_tristate m
-config IP_DCCP_ACKVEC
- bool
-
source "net/dccp/ccids/Kconfig"
menu "DCCP Kernel Hacking"
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index f4f8793aaff..2991efcc8de 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -2,14 +2,23 @@ obj-$(CONFIG_IP_DCCP) += dccp.o dccp_ipv4.o
dccp-y := ccid.o feat.o input.o minisocks.o options.o output.o proto.o timer.o
+#
+# CCID algorithms to be used by dccp.ko
+#
+# CCID-2 is default (RFC 4340, p. 77) and has Ack Vectors as dependency
+dccp-y += ccids/ccid2.o ackvec.o
+dccp-$(CONFIG_IP_DCCP_CCID3) += ccids/ccid3.o
+dccp-$(CONFIG_IP_DCCP_TFRC_LIB) += ccids/lib/tfrc.o \
+ ccids/lib/tfrc_equation.o \
+ ccids/lib/packet_history.o \
+ ccids/lib/loss_interval.o
+
dccp_ipv4-y := ipv4.o
# build dccp_ipv6 as module whenever either IPv6 or DCCP is a module
obj-$(subst y,$(CONFIG_IP_DCCP),$(CONFIG_IPV6)) += dccp_ipv6.o
dccp_ipv6-y := ipv6.o
-dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o
-
obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
obj-$(CONFIG_NET_DCCPPROBE) += dccp_probe.o
@@ -17,5 +26,3 @@ dccp-$(CONFIG_SYSCTL) += sysctl.o
dccp_diag-y := diag.o
dccp_probe-y := probe.o
-
-obj-y += ccids/
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index 4ccee030524..45f95e55f87 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -84,7 +84,6 @@ struct dccp_ackvec_record {
struct sock;
struct sk_buff;
-#ifdef CONFIG_IP_DCCP_ACKVEC
extern int dccp_ackvec_init(void);
extern void dccp_ackvec_exit(void);
@@ -106,52 +105,4 @@ static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
{
return av->av_vec_len;
}
-#else /* CONFIG_IP_DCCP_ACKVEC */
-static inline int dccp_ackvec_init(void)
-{
- return 0;
-}
-
-static inline void dccp_ackvec_exit(void)
-{
-}
-
-static inline struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
-{
- return NULL;
-}
-
-static inline void dccp_ackvec_free(struct dccp_ackvec *av)
-{
-}
-
-static inline int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
- const u64 ackno, const u8 state)
-{
- return -1;
-}
-
-static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
- struct sock *sk, const u64 ackno)
-{
-}
-
-static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
- const u64 *ackno, const u8 opt,
- const u8 *value, const u8 len)
-{
- return -1;
-}
-
-static inline int dccp_insert_option_ackvec(const struct sock *sk,
- const struct sk_buff *skb)
-{
- return -1;
-}
-
-static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
-{
- return 0;
-}
-#endif /* CONFIG_IP_DCCP_ACKVEC */
#endif /* _ACKVEC_H */
diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index bcc643f992a..f3e9ba1cfd0 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -12,56 +12,70 @@
*/
#include "ccid.h"
+#include "ccids/lib/tfrc.h"
-static u8 builtin_ccids[] = {
- DCCPC_CCID2, /* CCID2 is supported by default */
-#if defined(CONFIG_IP_DCCP_CCID3) || defined(CONFIG_IP_DCCP_CCID3_MODULE)
- DCCPC_CCID3,
+static struct ccid_operations *ccids[] = {
+ &ccid2_ops,
+#ifdef CONFIG_IP_DCCP_CCID3
+ &ccid3_ops,
#endif
};
-static struct ccid_operations *ccids[CCID_MAX];
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
-static atomic_t ccids_lockct = ATOMIC_INIT(0);
-static DEFINE_SPINLOCK(ccids_lock);
-
-/*
- * The strategy is: modifications ccids vector are short, do not sleep and
- * veeery rare, but read access should be free of any exclusive locks.
- */
-static void ccids_write_lock(void)
+static struct ccid_operations *ccid_by_number(const u8 id)
{
- spin_lock(&ccids_lock);
- while (atomic_read(&ccids_lockct) != 0) {
- spin_unlock(&ccids_lock);
- yield();
- spin_lock(&ccids_lock);
- }
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ccids); i++)
+ if (ccids[i]->ccid_id == id)
+ return ccids[i];
+ return NULL;
}
-static inline void ccids_write_unlock(void)
+/* check that up to @array_len members in @ccid_array are supported */
+bool ccid_support_check(u8 const *ccid_array, u8 array_len)
{
- spin_unlock(&ccids_lock);
+ while (array_len > 0)
+ if (ccid_by_number(ccid_array[--array_len]) == NULL)
+ return false;
+ return true;
}
-static inline void ccids_read_lock(void)
+/**
+ * ccid_get_builtin_ccids - Populate a list of built-in CCIDs
+ * @ccid_array: pointer to copy into
+ * @array_len: value to return length into
+ * This function allocates memory - caller must see that it is freed after use.
+ */
+int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len)
{
- atomic_inc(&ccids_lockct);
- smp_mb__after_atomic_inc();
- spin_unlock_wait(&ccids_lock);
+ *ccid_array = kmalloc(ARRAY_SIZE(ccids), gfp_any());
+ if (*ccid_array == NULL)
+ return -ENOBUFS;
+
+ for (*array_len = 0; *array_len < ARRAY_SIZE(ccids); *array_len += 1)
+ (*ccid_array)[*array_len] = ccids[*array_len]->ccid_id;
+ return 0;
}
-static inline void ccids_read_unlock(void)
+int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
{
- atomic_dec(&ccids_lockct);
-}
+ u8 *ccid_array, array_len;
+ int err = 0;
-#else
-#define ccids_write_lock() do { } while(0)
-#define ccids_write_unlock() do { } while(0)
-#define ccids_read_lock() do { } while(0)
-#define ccids_read_unlock() do { } while(0)
-#endif
+ if (len < ARRAY_SIZE(ccids))
+ return -EINVAL;
+
+ if (ccid_get_builtin_ccids(&ccid_array, &array_len))
+ return -ENOBUFS;
+
+ if (put_user(array_len, optlen) ||
+ copy_to_user(optval, ccid_array, array_len))
+ err = -EFAULT;
+
+ kfree(ccid_array);
+ return err;
+}
static struct kmem_cache *ccid_kmem_cache_create(int obj_size, const char *fmt,...)
{
@@ -93,48 +107,7 @@ static void ccid_kmem_cache_destroy(struct kmem_cache *slab)
}
}
-/* check that up to @array_len members in @ccid_array are supported */
-bool ccid_support_check(u8 const *ccid_array, u8 array_len)
-{
- u8 i, j, found;
-
- for (i = 0, found = 0; i < array_len; i++, found = 0) {
- for (j = 0; !found && j < ARRAY_SIZE(builtin_ccids); j++)
- found = (ccid_array[i] == builtin_ccids[j]);
- if (!found)
- return false;
- }
- return true;
-}
-
-/**
- * ccid_get_builtin_ccids - Provide copy of `builtin' CCID array
- * @ccid_array: pointer to copy into
- * @array_len: value to return length into
- * This function allocates memory - caller must see that it is freed after use.
- */
-int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len)
-{
- *ccid_array = kmemdup(builtin_ccids, sizeof(builtin_ccids), gfp_any());
- if (*ccid_array == NULL)
- return -ENOBUFS;
- *array_len = ARRAY_SIZE(builtin_ccids);
- return 0;
-}
-
-int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
- char __user *optval, int __user *optlen)
-{
- if (len < sizeof(builtin_ccids))
- return -EINVAL;
-
- if (put_user(sizeof(builtin_ccids), optlen) ||
- copy_to_user(optval, builtin_ccids, sizeof(builtin_ccids)))
- return -EFAULT;
- return 0;
-}
-
-int ccid_register(struct ccid_operations *ccid_ops)
+static int ccid_activate(struct ccid_operations *ccid_ops)
{
int err = -ENOBUFS;
@@ -152,79 +125,40 @@ int ccid_register(struct ccid_operations *ccid_ops)
if (ccid_ops->ccid_hc_tx_slab == NULL)
goto out_free_rx_slab;
- ccids_write_lock();
- err = -EEXIST;
- if (ccids[ccid_ops->ccid_id] == NULL) {
- ccids[ccid_ops->ccid_id] = ccid_ops;
- err = 0;
- }
- ccids_write_unlock();
- if (err != 0)
- goto out_free_tx_slab;
-
- pr_info("CCID: Registered CCID %d (%s)\n",
+ pr_info("CCID: Activated CCID %d (%s)\n",
ccid_ops->ccid_id, ccid_ops->ccid_name);
+ err = 0;
out:
return err;
-out_free_tx_slab:
- ccid_kmem_cache_destroy(ccid_ops->ccid_hc_tx_slab);
- ccid_ops->ccid_hc_tx_slab = NULL;
- goto out;
out_free_rx_slab:
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_rx_slab);
ccid_ops->ccid_hc_rx_slab = NULL;
goto out;
}
-EXPORT_SYMBOL_GPL(ccid_register);
-
-int ccid_unregister(struct ccid_operations *ccid_ops)
+static void ccid_deactivate(struct ccid_operations *ccid_ops)
{
- ccids_write_lock();
- ccids[ccid_ops->ccid_id] = NULL;
- ccids_write_unlock();
-
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_tx_slab);
ccid_ops->ccid_hc_tx_slab = NULL;
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_rx_slab);
ccid_ops->ccid_hc_rx_slab = NULL;
- pr_info("CCID: Unregistered CCID %d (%s)\n",
+ pr_info("CCID: Deactivated CCID %d (%s)\n",
ccid_ops->ccid_id, ccid_ops->ccid_name);
- return 0;
}
-EXPORT_SYMBOL_GPL(ccid_unregister);
-
-struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
+struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx)
{
- struct ccid_operations *ccid_ops;
+ struct ccid_operations *ccid_ops = ccid_by_number(id);
struct ccid *ccid = NULL;
- ccids_read_lock();
-#ifdef CONFIG_MODULES
- if (ccids[id] == NULL) {
- /* We only try to load if in process context */
- ccids_read_unlock();
- if (gfp & GFP_ATOMIC)
- goto out;
- request_module("net-dccp-ccid-%d", id);
- ccids_read_lock();
- }
-#endif
- ccid_ops = ccids[id];
if (ccid_ops == NULL)
- goto out_unlock;
-
- if (!try_module_get(ccid_ops->ccid_owner))
- goto out_unlock;
-
- ccids_read_unlock();
+ goto out;
ccid = kmem_cache_alloc(rx ? ccid_ops->ccid_hc_rx_slab :
- ccid_ops->ccid_hc_tx_slab, gfp);
+ ccid_ops->ccid_hc_tx_slab, gfp_any());
if (ccid == NULL)
- goto out_module_put;
+ goto out;
ccid->ccid_ops = ccid_ops;
if (rx) {
memset(ccid + 1, 0, ccid_ops->ccid_hc_rx_obj_size);
@@ -239,53 +173,57 @@ struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
}
out:
return ccid;
-out_unlock:
- ccids_read_unlock();
- goto out;
out_free_ccid:
kmem_cache_free(rx ? ccid_ops->ccid_hc_rx_slab :
ccid_ops->ccid_hc_tx_slab, ccid);
ccid = NULL;
-out_module_put:
- module_put(ccid_ops->ccid_owner);
goto out;
}
-EXPORT_SYMBOL_GPL(ccid_new);
-
-static void ccid_delete(struct ccid *ccid, struct sock *sk, int rx)
+void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk)
{
- struct ccid_operations *ccid_ops;
-
- if (ccid == NULL)
- return;
-
- ccid_ops = ccid->ccid_ops;
- if (rx) {
- if (ccid_ops->ccid_hc_rx_exit != NULL)
- ccid_ops->ccid_hc_rx_exit(sk);
- kmem_cache_free(ccid_ops->ccid_hc_rx_slab, ccid);
- } else {
- if (ccid_ops->ccid_hc_tx_exit != NULL)
- ccid_ops->ccid_hc_tx_exit(sk);
- kmem_cache_free(ccid_ops->ccid_hc_tx_slab, ccid);
+ if (ccid != NULL) {
+ if (ccid->ccid_ops->ccid_hc_rx_exit != NULL)
+ ccid->ccid_ops->ccid_hc_rx_exit(sk);
+ kmem_cache_free(ccid->ccid_ops->ccid_hc_rx_slab, ccid);
}
- ccids_read_lock();
- if (ccids[ccid_ops->ccid_id] != NULL)
- module_put(ccid_ops->ccid_owner);
- ccids_read_unlock();
}
-void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk)
+void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk)
{
- ccid_delete(ccid, sk, 1);
+ if (ccid != NULL) {
+ if (ccid->ccid_ops->ccid_hc_tx_exit != NULL)
+ ccid->ccid_ops->ccid_hc_tx_exit(sk);
+ kmem_cache_free(ccid->ccid_ops->ccid_hc_tx_slab, ccid);
+ }
}
-EXPORT_SYMBOL_GPL(ccid_hc_rx_delete);
-
-void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk)
+int __init ccid_initialize_builtins(void)
{
- ccid_delete(ccid, sk, 0);
+ int i, err = tfrc_lib_init();
+
+ if (err)
+ return err;
+
+ for (i = 0; i < ARRAY_SIZE(ccids); i++) {
+ err = ccid_activate(ccids[i]);
+ if (err)
+ goto unwind_registrations;
+ }
+ return 0;
+
+unwind_registrations:
+ while(--i >= 0)
+ ccid_deactivate(ccids[i]);
+ tfrc_lib_exit();
+ return err;
}
-EXPORT_SYMBOL_GPL(ccid_hc_tx_delete);
+void ccid_cleanup_builtins(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ccids); i++)
+ ccid_deactivate(ccids[i]);
+ tfrc_lib_exit();
+}
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index 18f69423a70..facedd20b53 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -29,7 +29,6 @@ struct tcp_info;
* @ccid_id: numerical CCID ID (up to %CCID_MAX, cf. table 5 in RFC 4340, 10.)
* @ccid_ccmps: the CCMPS including network/transport headers (0 when disabled)
* @ccid_name: alphabetical identifier string for @ccid_id
- * @ccid_owner: module which implements/owns this CCID
* @ccid_hc_{r,t}x_slab: memory pool for the receiver/sender half-connection
* @ccid_hc_{r,t}x_obj_size: size of the receiver/sender half-connection socket
*
@@ -48,7 +47,6 @@ struct ccid_operations {
unsigned char ccid_id;
__u32 ccid_ccmps;
const char *ccid_name;
- struct module *ccid_owner;
struct kmem_cache *ccid_hc_rx_slab,
*ccid_hc_tx_slab;
__u32 ccid_hc_rx_obj_size,
@@ -90,8 +88,13 @@ struct ccid_operations {
int __user *optlen);
};
-extern int ccid_register(struct ccid_operations *ccid_ops);
-extern int ccid_unregister(struct ccid_operations *ccid_ops);
+extern struct ccid_operations ccid2_ops;
+#ifdef CONFIG_IP_DCCP_CCID3
+extern struct ccid_operations ccid3_ops;
+#endif
+
+extern int ccid_initialize_builtins(void);
+extern void ccid_cleanup_builtins(void);
struct ccid {
struct ccid_operations *ccid_ops;
@@ -108,8 +111,7 @@ extern int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
extern int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
char __user *, int __user *);
-extern struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx,
- gfp_t gfp);
+extern struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);
static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
{
diff --git a/net/dccp/ccids/Kconfig b/net/dccp/ccids/Kconfig
index 12275943eab..b28bf962edc 100644
--- a/net/dccp/ccids/Kconfig
+++ b/net/dccp/ccids/Kconfig
@@ -1,80 +1,51 @@
menu "DCCP CCIDs Configuration (EXPERIMENTAL)"
depends on EXPERIMENTAL
-config IP_DCCP_CCID2
- tristate "CCID2 (TCP-Like) (EXPERIMENTAL)"
- def_tristate IP_DCCP
- select IP_DCCP_ACKVEC
- ---help---
- CCID 2, TCP-like Congestion Control, denotes Additive Increase,
- Multiplicative Decrease (AIMD) congestion control with behavior
- modelled directly on TCP, including congestion window, slow start,
- timeouts, and so forth [RFC 2581]. CCID 2 achieves maximum
- bandwidth over the long term, consistent with the use of end-to-end
- congestion control, but halves its congestion window in response to
- each congestion event. This leads to the abrupt rate changes
- typical of TCP. Applications should use CCID 2 if they prefer
- maximum bandwidth utilization to steadiness of rate. This is often
- the case for applications that are not playing their data directly
- to the user. For example, a hypothetical application that
- transferred files over DCCP, using application-level retransmissions
- for lost packets, would prefer CCID 2 to CCID 3. On-line games may
- also prefer CCID 2. See RFC 4341 for further details.
-
- CCID2 is the default CCID used by DCCP.
-
config IP_DCCP_CCID2_DEBUG
- bool "CCID2 debugging messages"
- depends on IP_DCCP_CCID2
- ---help---
- Enable CCID2-specific debugging messages.
+ bool "CCID-2 debugging messages"
+ ---help---
+ Enable CCID-2 specific debugging messages.
- When compiling CCID2 as a module, this debugging output can
- additionally be toggled by setting the ccid2_debug module
- parameter to 0 or 1.
+ The debugging output can additionally be toggled by setting the
+ ccid2_debug parameter to 0 or 1.
- If in doubt, say N.
+ If in doubt, say N.
config IP_DCCP_CCID3
- tristate "CCID3 (TCP-Friendly) (EXPERIMENTAL)"
- def_tristate IP_DCCP
- select IP_DCCP_TFRC_LIB
+ bool "CCID-3 (TCP-Friendly) (EXPERIMENTAL)"
+ def_bool y if (IP_DCCP = y || IP_DCCP = m)
---help---
- CCID 3 denotes TCP-Friendly Rate Control (TFRC), an equation-based
+ CCID-3 denotes TCP-Friendly Rate Control (TFRC), an equation-based
rate-controlled congestion control mechanism. TFRC is designed to
be reasonably fair when competing for bandwidth with TCP-like flows,
where a flow is "reasonably fair" if its sending rate is generally
within a factor of two of the sending rate of a TCP flow under the
same conditions. However, TFRC has a much lower variation of
- throughput over time compared with TCP, which makes CCID 3 more
- suitable than CCID 2 for applications such streaming media where a
+ throughput over time compared with TCP, which makes CCID-3 more
+ suitable than CCID-2 for applications such streaming media where a
relatively smooth sending rate is of importance.
- CCID 3 is further described in RFC 4342,
+ CCID-3 is further described in RFC 4342,
http://www.ietf.org/rfc/rfc4342.txt
The TFRC congestion control algorithms were initially described in
- RFC 3448.
+ RFC 5448.
This text was extracted from RFC 4340 (sec. 10.2),
http://www.ietf.org/rfc/rfc4340.txt
-
- To compile this CCID as a module, choose M here: the module will be
- called dccp_ccid3.
- If in doubt, say M.
+ If in doubt, say N.
config IP_DCCP_CCID3_DEBUG
- bool "CCID3 debugging messages"
- depends on IP_DCCP_CCID3
- ---help---
- Enable CCID3-specific debugging messages.
+ bool "CCID-3 debugging messages"
+ depends on IP_DCCP_CCID3
+ ---help---
+ Enable CCID-3 specific debugging messages.
- When compiling CCID3 as a module, this debugging output can
- additionally be toggled by setting the ccid3_debug module
- parameter to 0 or 1.
+ The debugging output can additionally be toggled by setting the
+ ccid3_debug parameter to 0 or 1.
- If in doubt, say N.
+ If in doubt, say N.
config IP_DCCP_CCID3_RTO
int "Use higher bound for nofeedback timer"
@@ -108,12 +79,8 @@ config IP_DCCP_CCID3_RTO
therefore not be performed on WANs.
config IP_DCCP_TFRC_LIB
- tristate
- default n
+ def_bool y if IP_DCCP_CCID3
config IP_DCCP_TFRC_DEBUG
- bool
- depends on IP_DCCP_TFRC_LIB
- default y if IP_DCCP_CCID3_DEBUG
-
+ def_bool y if IP_DCCP_CCID3_DEBUG
endmenu
diff --git a/net/dccp/ccids/Makefile b/net/dccp/ccids/Makefile
deleted file mode 100644
index 438f20bccff..00000000000
--- a/net/dccp/ccids/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-obj-$(CONFIG_IP_DCCP_CCID3) += dccp_ccid3.o
-
-dccp_ccid3-y := ccid3.o
-
-obj-$(CONFIG_IP_DCCP_CCID2) += dccp_ccid2.o
-
-dccp_ccid2-y := ccid2.o
-
-obj-y += lib/
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index c9ea19a4d85..d235294ace2 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -768,10 +768,9 @@ static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
}
}
-static struct ccid_operations ccid2 = {
+struct ccid_operations ccid2_ops = {
.ccid_id = DCCPC_CCID2,
.ccid_name = "TCP-like",
- .ccid_owner = THIS_MODULE,
.ccid_hc_tx_obj_size = sizeof(struct ccid2_hc_tx_sock),
.ccid_hc_tx_init = ccid2_hc_tx_init,
.ccid_hc_tx_exit = ccid2_hc_tx_exit,
@@ -784,22 +783,5 @@ static struct ccid_operations ccid2 = {
#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
module_param(ccid2_debug, bool, 0644);
-MODULE_PARM_DESC(ccid2_debug, "Enable debug messages");
+MODULE_PARM_DESC(ccid2_debug, "Enable CCID-2 debug messages");
#endif
-
-static __init int ccid2_module_init(void)
-{
- return ccid_register(&ccid2);
-}
-module_init(ccid2_module_init);
-
-static __exit void ccid2_module_exit(void)
-{
- ccid_unregister(&ccid2);
-}
-module_exit(ccid2_module_exit);
-
-MODULE_AUTHOR("Andrea Bittau <a.bittau@cs.ucl.ac.uk>");
-MODULE_DESCRIPTION("DCCP TCP-Like (CCID2) CCID");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("net-dccp-ccid-2");
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 3b8bd7ca676..a27b7f4c19c 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -940,10 +940,9 @@ static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
return 0;
}
-static struct ccid_operations ccid3 = {
+struct ccid_operations ccid3_ops = {
.ccid_id = DCCPC_CCID3,
.ccid_name = "TCP-Friendly Rate Control",
- .ccid_owner = THIS_MODULE,
.ccid_hc_tx_obj_size = sizeof(struct ccid3_hc_tx_sock),
.ccid_hc_tx_init = ccid3_hc_tx_init,
.ccid_hc_tx_exit = ccid3_hc_tx_exit,
@@ -964,23 +963,5 @@ static struct ccid_operations ccid3 = {
#ifdef CONFIG_IP_DCCP_CCID3_DEBUG
module_param(ccid3_debug, bool, 0644);
-MODULE_PARM_DESC(ccid3_debug, "Enable debug messages");
+MODULE_PARM_DESC(ccid3_debug, "Enable CCID-3 debug messages");
#endif
-
-static __init int ccid3_module_init(void)
-{
- return ccid_register(&ccid3);
-}
-module_init(ccid3_module_init);
-
-static __exit void ccid3_module_exit(void)
-{
- ccid_unregister(&ccid3);
-}
-module_exit(ccid3_module_exit);
-
-MODULE_AUTHOR("Ian McDonald <ian.mcdonald@jandi.co.nz>, "
- "Arnaldo Carvalho de Melo <acme@ghostprotocols.net>");
-MODULE_DESCRIPTION("DCCP TFRC CCID3 CCID");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("net-dccp-ccid-3");
diff --git a/net/dccp/ccids/lib/Makefile b/net/dccp/ccids/lib/Makefile
deleted file mode 100644
index 68c93e3d89d..00000000000
--- a/net/dccp/ccids/lib/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
-obj-$(CONFIG_IP_DCCP_TFRC_LIB) += dccp_tfrc_lib.o
-
-dccp_tfrc_lib-y := tfrc.o tfrc_equation.o packet_history.o loss_interval.o
diff --git a/net/dccp/ccids/lib/loss_interval.c b/net/dccp/ccids/lib/loss_interval.c
index 5b3ce0688c5..4d1e4012726 100644
--- a/net/dccp/ccids/lib/loss_interval.c
+++ b/net/dccp/ccids/lib/loss_interval.c
@@ -60,7 +60,6 @@ void tfrc_lh_cleanup(struct tfrc_loss_hist *lh)
lh->ring[LIH_INDEX(lh->counter)] = NULL;
}
}
-EXPORT_SYMBOL_GPL(tfrc_lh_cleanup);
static void tfrc_lh_calc_i_mean(struct tfrc_loss_hist *lh)
{
@@ -121,7 +120,6 @@ u8 tfrc_lh_update_i_mean(struct tfrc_loss_hist *lh, struct sk_buff *skb)
return (lh->i_mean < old_i_mean);
}
-EXPORT_SYMBOL_GPL(tfrc_lh_update_i_mean);
/* Determine if `new_loss' does begin a new loss interval [RFC 4342, 10.2] */
static inline u8 tfrc_lh_is_new_loss(struct tfrc_loss_interval *cur,
@@ -169,7 +167,6 @@ int tfrc_lh_interval_add(struct tfrc_loss_hist *lh, struct tfrc_rx_hist *rh,
}
return 1;
}
-EXPORT_SYMBOL_GPL(tfrc_lh_interval_add);
int __init tfrc_li_init(void)
{
diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c
index 6cc108afdc3..b7785b3581e 100644
--- a/net/dccp/ccids/lib/packet_history.c
+++ b/net/dccp/ccids/lib/packet_history.c
@@ -94,7 +94,6 @@ int tfrc_tx_hist_add(struct tfrc_tx_hist_entry **headp, u64 seqno)
*headp = entry;
return 0;
}
-EXPORT_SYMBOL_GPL(tfrc_tx_hist_add);
void tfrc_tx_hist_purge(struct tfrc_tx_hist_entry **headp)
{
@@ -109,7 +108,6 @@ void tfrc_tx_hist_purge(struct tfrc_tx_hist_entry **headp)
*headp = NULL;
}
-EXPORT_SYMBOL_GPL(tfrc_tx_hist_purge);
u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
const ktime_t now)
@@ -127,7 +125,6 @@ u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
return rtt;
}
-EXPORT_SYMBOL_GPL(tfrc_tx_hist_rtt);
/*
@@ -172,7 +169,6 @@ void tfrc_rx_hist_add_packet(struct tfrc_rx_hist *h,
tfrc_rx_hist_entry_from_skb(entry, skb, ndp);
}
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_add_packet);
/* has the packet contained in skb been seen before? */
int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb)
@@ -189,7 +185,6 @@ int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb)
return 0;
}
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_duplicate);
static void tfrc_rx_hist_swap(struct tfrc_rx_hist *h, const u8 a, const u8 b)
{
@@ -390,7 +385,6 @@ int tfrc_rx_handle_loss(struct tfrc_rx_hist *h,
}
return is_new_loss;
}
-EXPORT_SYMBOL_GPL(tfrc_rx_handle_loss);
int tfrc_rx_hist_alloc(struct tfrc_rx_hist *h)
{
@@ -412,7 +406,6 @@ out_free:
}
return -ENOBUFS;
}
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_alloc);
void tfrc_rx_hist_purge(struct tfrc_rx_hist *h)
{
@@ -424,7 +417,6 @@ void tfrc_rx_hist_purge(struct tfrc_rx_hist *h)
h->ring[i] = NULL;
}
}
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_purge);
/**
* tfrc_rx_hist_rtt_last_s - reference entry to compute RTT samples against
@@ -495,4 +487,3 @@ keep_ref_for_next_time:
return sample;
}
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_sample_rtt);
diff --git a/net/dccp/ccids/lib/tfrc.c b/net/dccp/ccids/lib/tfrc.c
index 185916218e0..60c412ccfee 100644
--- a/net/dccp/ccids/lib/tfrc.c
+++ b/net/dccp/ccids/lib/tfrc.c
@@ -1,20 +1,18 @@
/*
- * TFRC: main module holding the pieces of the TFRC library together
+ * TFRC library initialisation
*
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2007 Arnaldo Carvalho de Melo <acme@redhat.com>
*/
-#include <linux/module.h>
-#include <linux/moduleparam.h>
#include "tfrc.h"
#ifdef CONFIG_IP_DCCP_TFRC_DEBUG
int tfrc_debug;
module_param(tfrc_debug, bool, 0644);
-MODULE_PARM_DESC(tfrc_debug, "Enable debug messages");
+MODULE_PARM_DESC(tfrc_debug, "Enable TFRC debug messages");
#endif
-static int __init tfrc_module_init(void)
+int __init tfrc_lib_init(void)
{
int rc = tfrc_li_init();
@@ -38,18 +36,9 @@ out:
return rc;
}
-static void __exit tfrc_module_exit(void)
+void __exit tfrc_lib_exit(void)
{
tfrc_rx_packet_history_exit();
tfrc_tx_packet_history_exit();
tfrc_li_exit();
}
-
-module_init(tfrc_module_init);
-module_exit(tfrc_module_exit);
-
-MODULE_AUTHOR("Gerrit Renker <gerrit@erg.abdn.ac.uk>, "
- "Ian McDonald <ian.mcdonald@jandi.co.nz>, "
- "Arnaldo Carvalho de Melo <acme@redhat.com>");
-MODULE_DESCRIPTION("DCCP TFRC library");
-MODULE_LICENSE("GPL");
diff --git a/net/dccp/ccids/lib/tfrc.h b/net/dccp/ccids/lib/tfrc.h
index ed9857527ac..e9720b14327 100644
--- a/net/dccp/ccids/lib/tfrc.h
+++ b/net/dccp/ccids/lib/tfrc.h
@@ -17,7 +17,8 @@
#include <linux/types.h>
#include <linux/math64.h>
#include "../../dccp.h"
-/* internal includes that this module exports: */
+
+/* internal includes that this library exports: */
#include "loss_interval.h"
#include "packet_history.h"
@@ -66,4 +67,12 @@ extern void tfrc_rx_packet_history_exit(void);
extern int tfrc_li_init(void);
extern void tfrc_li_exit(void);
+
+#ifdef CONFIG_IP_DCCP_TFRC_LIB
+extern int tfrc_lib_init(void);
+extern void tfrc_lib_exit(void);
+#else
+#define tfrc_lib_init() (0)
+#define tfrc_lib_exit()
+#endif
#endif /* _TFRC_H_ */
diff --git a/net/dccp/ccids/lib/tfrc_equation.c b/net/dccp/ccids/lib/tfrc_equation.c
index 2f20a29cffe..c5d3a9e5a5a 100644
--- a/net/dccp/ccids/lib/tfrc_equation.c
+++ b/net/dccp/ccids/lib/tfrc_equation.c
@@ -659,8 +659,6 @@ u32 tfrc_calc_x(u16 s, u32 R, u32 p)
return scaled_div32(result, f);
}
-EXPORT_SYMBOL_GPL(tfrc_calc_x);
-
/**
* tfrc_calc_x_reverse_lookup - try to find p given f(p)
*
@@ -693,5 +691,3 @@ u32 tfrc_calc_x_reverse_lookup(u32 fvalue)
index = tfrc_binsearch(fvalue, 0);
return (index + 1) * 1000000 / TFRC_CALC_X_ARRSIZE;
}
-
-EXPORT_SYMBOL_GPL(tfrc_calc_x_reverse_lookup);
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 0bc4c9a02e1..f2230fc168e 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -432,10 +432,8 @@ static inline int dccp_ack_pending(const struct sock *sk)
{
const struct dccp_sock *dp = dccp_sk(sk);
return dp->dccps_timestamp_echo != 0 ||
-#ifdef CONFIG_IP_DCCP_ACKVEC
(dp->dccps_hc_rx_ackvec != NULL &&
dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
-#endif
inet_csk_ack_scheduled(sk);
}
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index 30f9fb76b92..4152308958a 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -34,7 +34,7 @@
static int dccp_hdlr_ccid(struct sock *sk, u64 ccid, bool rx)
{
struct dccp_sock *dp = dccp_sk(sk);
- struct ccid *new_ccid = ccid_new(ccid, sk, rx, gfp_any());
+ struct ccid *new_ccid = ccid_new(ccid, sk, rx);
if (new_ccid == NULL)
return -ENOMEM;
@@ -1214,8 +1214,6 @@ const char *dccp_feat_typename(const u8 type)
return NULL;
}
-EXPORT_SYMBOL_GPL(dccp_feat_typename);
-
const char *dccp_feat_name(const u8 feat)
{
static const char *feature_names[] = {
@@ -1240,6 +1238,4 @@ const char *dccp_feat_name(const u8 feat)
return feature_names[feat];
}
-
-EXPORT_SYMBOL_GPL(dccp_feat_name);
#endif /* CONFIG_IP_DCCP_DEBUG */
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 5eb443f656c..7648f316310 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -741,5 +741,3 @@ u32 dccp_sample_rtt(struct sock *sk, long delta)
return delta;
}
-
-EXPORT_SYMBOL_GPL(dccp_sample_rtt);
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 1747ccae8e8..945b4d5d23b 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -1118,9 +1118,15 @@ static int __init dccp_init(void)
if (rc)
goto out_ackvec_exit;
+ rc = ccid_initialize_builtins();
+ if (rc)
+ goto out_sysctl_exit;
+
dccp_timestamping_init();
out:
return rc;
+out_sysctl_exit:
+ dccp_sysctl_exit();
out_ackvec_exit:
dccp_ackvec_exit();
out_free_dccp_mib:
@@ -1143,6 +1149,7 @@ out_free_percpu:
static void __exit dccp_fini(void)
{
+ ccid_cleanup_builtins();
dccp_mib_exit();
free_pages((unsigned long)dccp_hashinfo.bhash,
get_order(dccp_hashinfo.bhash_size *
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f28acf11fc6..35bcddf8a93 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -580,10 +580,6 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
else if (!ret) {
if (spliced)
break;
- if (flags & SPLICE_F_NONBLOCK) {
- ret = -EAGAIN;
- break;
- }
if (sock_flag(sk, SOCK_DONE))
break;
if (sk->sk_err) {
@@ -2519,9 +2515,7 @@ found:
flush |= memcmp(th + 1, th2 + 1, thlen - sizeof(*th));
total = p->len;
- mss = total;
- if (skb_shinfo(p)->frag_list)
- mss = skb_shinfo(p)->frag_list->len;
+ mss = skb_shinfo(p)->gso_size;
flush |= skb->len > mss || skb->len <= 0;
flush |= ntohl(th2->seq) + total != ntohl(th->seq);
@@ -2557,7 +2551,6 @@ int tcp_gro_complete(struct sk_buff *skb)
skb->csum_offset = offsetof(struct tcphdr, check);
skb->ip_summed = CHECKSUM_PARTIAL;
- skb_shinfo(skb)->gso_size = skb_shinfo(skb)->frag_list->len;
skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
if (th->cwr)
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index eeeaad2e8b5..40f324655e2 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -404,7 +404,7 @@ sticky_done:
else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
goto e_inval;
- if (copy_from_user(&pkt, optval, optlen)) {
+ if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
retv = -EFAULT;
break;
}
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 18c486cf498..76f06b94ab9 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -627,6 +627,9 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
rt = ip6_rt_copy(ort);
if (rt) {
+ struct neighbour *neigh;
+ int attempts = !in_softirq();
+
if (!(rt->rt6i_flags&RTF_GATEWAY)) {
if (rt->rt6i_dst.plen != 128 &&
ipv6_addr_equal(&rt->rt6i_dst.addr, daddr))
@@ -646,7 +649,35 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
}
#endif
- rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+ retry:
+ neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+ if (IS_ERR(neigh)) {
+ struct net *net = dev_net(rt->rt6i_dev);
+ int saved_rt_min_interval =
+ net->ipv6.sysctl.ip6_rt_gc_min_interval;
+ int saved_rt_elasticity =
+ net->ipv6.sysctl.ip6_rt_gc_elasticity;
+
+ if (attempts-- > 0) {
+ net->ipv6.sysctl.ip6_rt_gc_elasticity = 1;
+ net->ipv6.sysctl.ip6_rt_gc_min_interval = 0;
+
+ ip6_dst_gc(net->ipv6.ip6_dst_ops);
+
+ net->ipv6.sysctl.ip6_rt_gc_elasticity =
+ saved_rt_elasticity;
+ net->ipv6.sysctl.ip6_rt_gc_min_interval =
+ saved_rt_min_interval;
+ goto retry;
+ }
+
+ if (net_ratelimit())
+ printk(KERN_WARNING
+ "Neighbour table overflow.\n");
+ dst_free(&rt->u.dst);
+ return NULL;
+ }
+ rt->rt6i_nexthop = neigh;
}
@@ -945,8 +976,11 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
dev_hold(dev);
if (neigh)
neigh_hold(neigh);
- else
+ else {
neigh = ndisc_get_neigh(dev, addr);
+ if (IS_ERR(neigh))
+ neigh = NULL;
+ }
rt->rt6i_dev = dev;
rt->rt6i_idev = idev;
@@ -1887,6 +1921,7 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
{
struct net *net = dev_net(idev->dev);
struct rt6_info *rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops);
+ struct neighbour *neigh;
if (rt == NULL)
return ERR_PTR(-ENOMEM);
@@ -1909,11 +1944,18 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
rt->rt6i_flags |= RTF_ANYCAST;
else
rt->rt6i_flags |= RTF_LOCAL;
- rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
- if (rt->rt6i_nexthop == NULL) {
+ neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+ if (IS_ERR(neigh)) {
dst_free(&rt->u.dst);
- return ERR_PTR(-ENOMEM);
+
+ /* We are casting this because that is the return
+ * value type. But an errno encoded pointer is the
+ * same regardless of the underlying pointer type,
+ * and that's what we are returning. So this is OK.
+ */
+ return (struct rt6_info *) neigh;
}
+ rt->rt6i_nexthop = neigh;
ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
rt->rt6i_dst.plen = 128;
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index af3192d2a5a..eb8a2a0b6eb 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -494,7 +494,21 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
if (err) {
iucv_path_free(iucv->path);
iucv->path = NULL;
- err = -ECONNREFUSED;
+ switch (err) {
+ case 0x0b: /* Target communicator is not logged on */
+ err = -ENETUNREACH;
+ break;
+ case 0x0d: /* Max connections for this guest exceeded */
+ case 0x0e: /* Max connections for target guest exceeded */
+ err = -EAGAIN;
+ break;
+ case 0x0f: /* Missing IUCV authorization */
+ err = -EACCES;
+ break;
+ default:
+ err = -ECONNREFUSED;
+ break;
+ }
goto done;
}
@@ -507,6 +521,13 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
release_sock(sk);
return -ECONNREFUSED;
}
+
+ if (err) {
+ iucv_path_sever(iucv->path, NULL);
+ iucv_path_free(iucv->path);
+ iucv->path = NULL;
+ }
+
done:
release_sock(sk);
return err;
@@ -1021,12 +1042,14 @@ static int iucv_callback_connreq(struct iucv_path *path,
ASCEBC(user_data, sizeof(user_data));
if (sk->sk_state != IUCV_LISTEN) {
err = iucv_path_sever(path, user_data);
+ iucv_path_free(path);
goto fail;
}
/* Check for backlog size */
if (sk_acceptq_is_full(sk)) {
err = iucv_path_sever(path, user_data);
+ iucv_path_free(path);
goto fail;
}
@@ -1034,6 +1057,7 @@ static int iucv_callback_connreq(struct iucv_path *path,
nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC);
if (!nsk) {
err = iucv_path_sever(path, user_data);
+ iucv_path_free(path);
goto fail;
}
@@ -1057,6 +1081,8 @@ static int iucv_callback_connreq(struct iucv_path *path,
err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk);
if (err) {
err = iucv_path_sever(path, user_data);
+ iucv_path_free(path);
+ iucv_sock_kill(nsk);
goto fail;
}
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 8f57d4f4328..032f61e9859 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -517,6 +517,7 @@ static int iucv_enable(void)
size_t alloc_size;
int cpu, rc;
+ get_online_cpus();
rc = -ENOMEM;
alloc_size = iucv_max_pathid * sizeof(struct iucv_path);
iucv_path_table = kzalloc(alloc_size, GFP_KERNEL);
@@ -524,19 +525,17 @@ static int iucv_enable(void)
goto out;
/* Declare per cpu buffers. */
rc = -EIO;
- get_online_cpus();
for_each_online_cpu(cpu)
smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
if (cpus_empty(iucv_buffer_cpumask))
/* No cpu could declare an iucv buffer. */
- goto out_path;
+ goto out;
put_online_cpus();
return 0;
-
-out_path:
- put_online_cpus();
- kfree(iucv_path_table);
out:
+ kfree(iucv_path_table);
+ iucv_path_table = NULL;
+ put_online_cpus();
return rc;
}
@@ -551,8 +550,9 @@ static void iucv_disable(void)
{
get_online_cpus();
on_each_cpu(iucv_retrieve_cpu, NULL, 1);
- put_online_cpus();
kfree(iucv_path_table);
+ iucv_path_table = NULL;
+ put_online_cpus();
}
static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
@@ -589,10 +589,14 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
case CPU_ONLINE_FROZEN:
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
+ if (!iucv_path_table)
+ break;
smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
+ if (!iucv_path_table)
+ break;
cpumask = iucv_buffer_cpumask;
cpu_clear(cpu, cpumask);
if (cpus_empty(cpumask))
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 3c94f76d552..3eaa39403c1 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -54,10 +54,10 @@ static unsigned long rfkill_states_lockdflt[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
static bool rfkill_epo_lock_active;
+#ifdef CONFIG_RFKILL_LEDS
static void rfkill_led_trigger(struct rfkill *rfkill,
enum rfkill_state state)
{
-#ifdef CONFIG_RFKILL_LEDS
struct led_trigger *led = &rfkill->led_trigger;
if (!led->name)
@@ -66,10 +66,8 @@ static void rfkill_led_trigger(struct rfkill *rfkill,
led_trigger_event(led, LED_OFF);
else
led_trigger_event(led, LED_FULL);
-#endif /* CONFIG_RFKILL_LEDS */
}
-#ifdef CONFIG_RFKILL_LEDS
static void rfkill_led_trigger_activate(struct led_classdev *led)
{
struct rfkill *rfkill = container_of(led->trigger,
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 05d178008cb..07372f60bee 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -638,8 +638,9 @@ static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
break;
n->next = *ins;
- wmb();
+ tcf_tree_lock(tp);
*ins = n;
+ tcf_tree_unlock(tp);
*arg = (unsigned long)n;
return 0;