From a9b3cd7f323b2e57593e7215362a7b02fc933e3a Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Mon, 1 Aug 2011 16:19:00 +0000
Subject: rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER
When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.
Convert all rcu_assign_pointer of NULL value.
//smpl
@@ expression P; @@
- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)
// </smpl>
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/core/sock.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'net/core/sock.c')
diff --git a/net/core/sock.c b/net/core/sock.c
index bc745d00ea4..9997026b44b 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -387,7 +387,7 @@ struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie)
if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
sk_tx_queue_clear(sk);
- rcu_assign_pointer(sk->sk_dst_cache, NULL);
+ RCU_INIT_POINTER(sk->sk_dst_cache, NULL);
dst_release(dst);
return NULL;
}
@@ -1158,7 +1158,7 @@ static void __sk_free(struct sock *sk)
atomic_read(&sk->sk_wmem_alloc) == 0);
if (filter) {
sk_filter_uncharge(sk, filter);
- rcu_assign_pointer(sk->sk_filter, NULL);
+ RCU_INIT_POINTER(sk->sk_filter, NULL);
}
sock_disable_timestamp(sk, SOCK_TIMESTAMP);
--
cgit v1.2.3-70-g09d2
From ea2ab69379a941c6f8884e290fdd28c93936a778 Mon Sep 17 00:00:00 2001
From: Ian Campbell <Ian.Campbell@citrix.com>
Date: Mon, 22 Aug 2011 23:44:58 +0000
Subject: net: convert core to skb paged frag APIs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/skbuff.h | 4 ++--
net/core/datagram.c | 8 ++++----
net/core/dev.c | 16 +++++++++-------
net/core/kmap_skb.h | 2 +-
net/core/pktgen.c | 3 +--
net/core/skbuff.c | 29 +++++++++++++++--------------
net/core/sock.c | 12 +++++-------
net/core/user_dma.c | 2 +-
8 files changed, 38 insertions(+), 38 deletions(-)
(limited to 'net/core/sock.c')
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 7b0e1773f9c..8d426281259 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1898,12 +1898,12 @@ static inline int skb_add_data(struct sk_buff *skb,
}
static inline int skb_can_coalesce(struct sk_buff *skb, int i,
- struct page *page, int off)
+ const struct page *page, int off)
{
if (i) {
struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
- return page == frag->page &&
+ return page == skb_frag_page(frag) &&
off == frag->page_offset + frag->size;
}
return 0;
diff --git a/net/core/datagram.c b/net/core/datagram.c
index 18ac112ea7a..6449bed457d 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -332,7 +332,7 @@ int skb_copy_datagram_iovec(const struct sk_buff *skb, int offset,
int err;
u8 *vaddr;
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- struct page *page = frag->page;
+ struct page *page = skb_frag_page(frag);
if (copy > len)
copy = len;
@@ -418,7 +418,7 @@ int skb_copy_datagram_const_iovec(const struct sk_buff *skb, int offset,
int err;
u8 *vaddr;
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- struct page *page = frag->page;
+ struct page *page = skb_frag_page(frag);
if (copy > len)
copy = len;
@@ -508,7 +508,7 @@ int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset,
int err;
u8 *vaddr;
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- struct page *page = frag->page;
+ struct page *page = skb_frag_page(frag);
if (copy > len)
copy = len;
@@ -594,7 +594,7 @@ static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset,
int err = 0;
u8 *vaddr;
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- struct page *page = frag->page;
+ struct page *page = skb_frag_page(frag);
if (copy > len)
copy = len;
diff --git a/net/core/dev.c b/net/core/dev.c
index b668a3d9a18..b2e262ed396 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1949,9 +1949,11 @@ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
#ifdef CONFIG_HIGHMEM
int i;
if (!(dev->features & NETIF_F_HIGHDMA)) {
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- if (PageHighMem(skb_shinfo(skb)->frags[i].page))
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ if (PageHighMem(skb_frag_page(frag)))
return 1;
+ }
}
if (PCI_DMA_BUS_IS_PHYS) {
@@ -1960,7 +1962,8 @@ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
if (!pdev)
return 0;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- dma_addr_t addr = page_to_phys(skb_shinfo(skb)->frags[i].page);
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ dma_addr_t addr = page_to_phys(skb_frag_page(frag));
if (!pdev->dma_mask || addr + PAGE_SIZE - 1 > *pdev->dma_mask)
return 1;
}
@@ -3474,7 +3477,7 @@ pull:
skb_shinfo(skb)->frags[0].size -= grow;
if (unlikely(!skb_shinfo(skb)->frags[0].size)) {
- put_page(skb_shinfo(skb)->frags[0].page);
+ skb_frag_unref(skb, 0);
memmove(skb_shinfo(skb)->frags,
skb_shinfo(skb)->frags + 1,
--skb_shinfo(skb)->nr_frags * sizeof(skb_frag_t));
@@ -3538,10 +3541,9 @@ void skb_gro_reset_offset(struct sk_buff *skb)
NAPI_GRO_CB(skb)->frag0_len = 0;
if (skb->mac_header == skb->tail &&
- !PageHighMem(skb_shinfo(skb)->frags[0].page)) {
+ !PageHighMem(skb_frag_page(&skb_shinfo(skb)->frags[0]))) {
NAPI_GRO_CB(skb)->frag0 =
- page_address(skb_shinfo(skb)->frags[0].page) +
- skb_shinfo(skb)->frags[0].page_offset;
+ skb_frag_address(&skb_shinfo(skb)->frags[0]);
NAPI_GRO_CB(skb)->frag0_len = skb_shinfo(skb)->frags[0].size;
}
}
diff --git a/net/core/kmap_skb.h b/net/core/kmap_skb.h
index 283c2b993fb..81e1ed7c838 100644
--- a/net/core/kmap_skb.h
+++ b/net/core/kmap_skb.h
@@ -7,7 +7,7 @@ static inline void *kmap_skb_frag(const skb_frag_t *frag)
local_bh_disable();
#endif
- return kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ);
+ return kmap_atomic(skb_frag_page(frag), KM_SKB_DATA_SOFTIRQ);
}
static inline void kunmap_skb_frag(void *vaddr)
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index e35a6fbb811..796044ac0bf 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -2602,8 +2602,7 @@ static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
if (!pkt_dev->page)
break;
}
- skb_shinfo(skb)->frags[i].page = pkt_dev->page;
- get_page(pkt_dev->page);
+ skb_frag_set_page(skb, i, pkt_dev->page);
skb_shinfo(skb)->frags[i].page_offset = 0;
/*last fragment, fill rest of data*/
if (i == (frags - 1))
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e27334ec367..296afd0aa8d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -326,7 +326,7 @@ static void skb_release_data(struct sk_buff *skb)
if (skb_shinfo(skb)->nr_frags) {
int i;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- put_page(skb_shinfo(skb)->frags[i].page);
+ skb_frag_unref(skb, i);
}
/*
@@ -809,7 +809,7 @@ struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
}
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
skb_shinfo(n)->frags[i] = skb_shinfo(skb)->frags[i];
- get_page(skb_shinfo(n)->frags[i].page);
+ skb_frag_ref(skb, i);
}
skb_shinfo(n)->nr_frags = i;
}
@@ -901,7 +901,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
skb_shinfo(skb)->tx_flags &= ~SKBTX_DEV_ZEROCOPY;
}
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- get_page(skb_shinfo(skb)->frags[i].page);
+ skb_frag_ref(skb, i);
if (skb_has_frag_list(skb))
skb_clone_fraglist(skb);
@@ -1181,7 +1181,7 @@ drop_pages:
skb_shinfo(skb)->nr_frags = i;
for (; i < nfrags; i++)
- put_page(skb_shinfo(skb)->frags[i].page);
+ skb_frag_unref(skb, i);
if (skb_has_frag_list(skb))
skb_drop_fraglist(skb);
@@ -1350,7 +1350,7 @@ pull_pages:
k = 0;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
if (skb_shinfo(skb)->frags[i].size <= eat) {
- put_page(skb_shinfo(skb)->frags[i].page);
+ skb_frag_unref(skb, i);
eat -= skb_shinfo(skb)->frags[i].size;
} else {
skb_shinfo(skb)->frags[k] = skb_shinfo(skb)->frags[i];
@@ -1609,7 +1609,8 @@ static int __skb_splice_bits(struct sk_buff *skb, struct pipe_inode_info *pipe,
for (seg = 0; seg < skb_shinfo(skb)->nr_frags; seg++) {
const skb_frag_t *f = &skb_shinfo(skb)->frags[seg];
- if (__splice_segment(f->page, f->page_offset, f->size,
+ if (__splice_segment(skb_frag_page(f),
+ f->page_offset, f->size,
offset, len, skb, spd, 0, sk, pipe))
return 1;
}
@@ -2154,7 +2155,7 @@ static inline void skb_split_no_header(struct sk_buff *skb,
* where splitting is expensive.
* 2. Split is accurately. We make this.
*/
- get_page(skb_shinfo(skb)->frags[i].page);
+ skb_frag_ref(skb, i);
skb_shinfo(skb1)->frags[0].page_offset += len - pos;
skb_shinfo(skb1)->frags[0].size -= len - pos;
skb_shinfo(skb)->frags[i].size = len - pos;
@@ -2229,7 +2230,8 @@ int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen)
* commit all, so that we don't have to undo partial changes
*/
if (!to ||
- !skb_can_coalesce(tgt, to, fragfrom->page, fragfrom->page_offset)) {
+ !skb_can_coalesce(tgt, to, skb_frag_page(fragfrom),
+ fragfrom->page_offset)) {
merge = -1;
} else {
merge = to - 1;
@@ -2276,7 +2278,7 @@ int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen)
to++;
} else {
- get_page(fragfrom->page);
+ __skb_frag_ref(fragfrom);
fragto->page = fragfrom->page;
fragto->page_offset = fragfrom->page_offset;
fragto->size = todo;
@@ -2298,7 +2300,7 @@ int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen)
fragto = &skb_shinfo(tgt)->frags[merge];
fragto->size += fragfrom->size;
- put_page(fragfrom->page);
+ __skb_frag_unref(fragfrom);
}
/* Reposition in the original skb */
@@ -2543,8 +2545,7 @@ int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
left = PAGE_SIZE - frag->page_offset;
copy = (length > left)? left : length;
- ret = getfrag(from, (page_address(frag->page) +
- frag->page_offset + frag->size),
+ ret = getfrag(from, skb_frag_address(frag) + frag->size,
offset, copy, 0, skb);
if (ret < 0)
return -EFAULT;
@@ -2696,7 +2697,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, u32 features)
while (pos < offset + len && i < nfrags) {
*frag = skb_shinfo(skb)->frags[i];
- get_page(frag->page);
+ __skb_frag_ref(frag);
size = frag->size;
if (pos < offset) {
@@ -2919,7 +2920,7 @@ __skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
if (copy > len)
copy = len;
- sg_set_page(&sg[elt], frag->page, copy,
+ sg_set_page(&sg[elt], skb_frag_page(frag), copy,
frag->page_offset+offset-start);
elt++;
if (!(len -= copy))
diff --git a/net/core/sock.c b/net/core/sock.c
index 9997026b44b..b29ab61b029 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1533,7 +1533,6 @@ struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
skb_shinfo(skb)->nr_frags = npages;
for (i = 0; i < npages; i++) {
struct page *page;
- skb_frag_t *frag;
page = alloc_pages(sk->sk_allocation, 0);
if (!page) {
@@ -1543,12 +1542,11 @@ struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
goto failure;
}
- frag = &skb_shinfo(skb)->frags[i];
- frag->page = page;
- frag->page_offset = 0;
- frag->size = (data_len >= PAGE_SIZE ?
- PAGE_SIZE :
- data_len);
+ __skb_fill_page_desc(skb, i,
+ page, 0,
+ (data_len >= PAGE_SIZE ?
+ PAGE_SIZE :
+ data_len));
data_len -= PAGE_SIZE;
}
diff --git a/net/core/user_dma.c b/net/core/user_dma.c
index 25d717ebc92..34e9664cae3 100644
--- a/net/core/user_dma.c
+++ b/net/core/user_dma.c
@@ -78,7 +78,7 @@ int dma_skb_copy_datagram_iovec(struct dma_chan *chan,
copy = end - offset;
if (copy > 0) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- struct page *page = frag->page;
+ struct page *page = skb_frag_page(frag);
if (copy > len)
copy = len;
--
cgit v1.2.3-70-g09d2
From 8083f0fc969d9b5353061a7a6f963405057e26b1 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Fri, 7 Oct 2011 03:30:20 +0000
Subject: net: use sock_valbool_flag to set/clear SOCK_RXQ_OVFL
There's no point in open-coding sock_valbool_flag().
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/core/sock.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
(limited to 'net/core/sock.c')
diff --git a/net/core/sock.c b/net/core/sock.c
index b29ab61b029..83c462d3f45 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -738,10 +738,7 @@ set_rcvbuf:
/* We implement the SO_SNDLOWAT etc to
not be settable (1003.1g 5.3) */
case SO_RXQ_OVFL:
- if (valbool)
- sock_set_flag(sk, SOCK_RXQ_OVFL);
- else
- sock_reset_flag(sk, SOCK_RXQ_OVFL);
+ sock_valbool_flag(sk, SOCK_RXQ_OVFL, valbool);
break;
default:
ret = -ENOPROTOOPT;
--
cgit v1.2.3-70-g09d2
From 87fb4b7b533073eeeaed0b6bf7c2328995f6c075 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 13 Oct 2011 07:28:54 +0000
Subject: net: more accurate skb truesize
skb truesize currently accounts for sk_buff struct and part of skb head.
kmalloc() roundings are also ignored.
Considering that skb_shared_info is larger than sk_buff, its time to
take it into account for better memory accounting.
This patch introduces SKB_TRUESIZE(X) macro to centralize various
assumptions into a single place.
At skb alloc phase, we put skb_shared_info struct at the exact end of
skb head, to allow a better use of memory (lowering number of
reallocations), since kmalloc() gives us power-of-two memory blocks.
Unless SLUB/SLUB debug is active, both skb->head and skb_shared_info are
aligned to cache lines, as before.
Note: This patch might trigger performance regressions because of
misconfigured protocol stacks, hitting per socket or global memory
limits that were previously not reached. But its a necessary step for a
more accurate memory accounting.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Andi Kleen <ak@linux.intel.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/skbuff.h | 5 +++++
net/core/skbuff.c | 18 ++++++++++++++----
net/core/sock.c | 2 +-
net/ipv4/icmp.c | 5 ++---
net/ipv4/tcp_input.c | 14 +++++++-------
net/ipv6/icmp.c | 3 +--
net/iucv/af_iucv.c | 2 +-
net/sctp/protocol.c | 2 +-
8 files changed, 32 insertions(+), 19 deletions(-)
(limited to 'net/core/sock.c')
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index ac6b05a325c..64f86951ef7 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -46,6 +46,11 @@
#define SKB_MAX_HEAD(X) (SKB_MAX_ORDER((X), 0))
#define SKB_MAX_ALLOC (SKB_MAX_ORDER(0, 2))
+/* return minimum truesize of one skb containing X bytes of data */
+#define SKB_TRUESIZE(X) ((X) + \
+ SKB_DATA_ALIGN(sizeof(struct sk_buff)) + \
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
+
/* A. Checksumming of received packets by device.
*
* NONE: device failed to checksum this packet.
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5b2c5f1d4db..a7f855dca92 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -184,11 +184,20 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
goto out;
prefetchw(skb);
- size = SKB_DATA_ALIGN(size);
- data = kmalloc_node_track_caller(size + sizeof(struct skb_shared_info),
- gfp_mask, node);
+ /* We do our best to align skb_shared_info on a separate cache
+ * line. It usually works because kmalloc(X > SMP_CACHE_BYTES) gives
+ * aligned memory blocks, unless SLUB/SLAB debug is enabled.
+ * Both skb->head and skb_shared_info are cache line aligned.
+ */
+ size += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+ data = kmalloc_node_track_caller(size, gfp_mask, node);
if (!data)
goto nodata;
+ /* kmalloc(size) might give us more room than requested.
+ * Put skb_shared_info exactly at the end of allocated zone,
+ * to allow max possible filling before reallocation.
+ */
+ size = SKB_WITH_OVERHEAD(ksize(data));
prefetchw(data + size);
/*
@@ -197,7 +206,8 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
* the tail pointer in struct sk_buff!
*/
memset(skb, 0, offsetof(struct sk_buff, tail));
- skb->truesize = size + sizeof(struct sk_buff);
+ /* Account for allocated memory : skb + skb->head */
+ skb->truesize = SKB_TRUESIZE(size);
atomic_set(&skb->users, 1);
skb->head = data;
skb->data = data;
diff --git a/net/core/sock.c b/net/core/sock.c
index 83c462d3f45..5a087626bb3 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -207,7 +207,7 @@ static struct lock_class_key af_callback_keys[AF_MAX];
* not depend upon such differences.
*/
#define _SK_MEM_PACKETS 256
-#define _SK_MEM_OVERHEAD (sizeof(struct sk_buff) + 256)
+#define _SK_MEM_OVERHEAD SKB_TRUESIZE(256)
#define SK_WMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
#define SK_RMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 23ef31baa1a..ab188ae12fd 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -1152,10 +1152,9 @@ static int __net_init icmp_sk_init(struct net *net)
net->ipv4.icmp_sk[i] = sk;
/* Enough space for 2 64K ICMP packets, including
- * sk_buff struct overhead.
+ * sk_buff/skb_shared_info struct overhead.
*/
- sk->sk_sndbuf =
- (2 * ((64 * 1024) + sizeof(struct sk_buff)));
+ sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
/*
* Speedup sock_wfree()
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 81cae641c9a..c1653fe4725 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -265,8 +265,7 @@ static inline int TCP_ECN_rcv_ecn_echo(struct tcp_sock *tp, struct tcphdr *th)
static void tcp_fixup_sndbuf(struct sock *sk)
{
- int sndmem = tcp_sk(sk)->rx_opt.mss_clamp + MAX_TCP_HEADER + 16 +
- sizeof(struct sk_buff);
+ int sndmem = SKB_TRUESIZE(tcp_sk(sk)->rx_opt.mss_clamp + MAX_TCP_HEADER);
if (sk->sk_sndbuf < 3 * sndmem) {
sk->sk_sndbuf = 3 * sndmem;
@@ -349,7 +348,7 @@ static void tcp_grow_window(struct sock *sk, struct sk_buff *skb)
static void tcp_fixup_rcvbuf(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
- int rcvmem = tp->advmss + MAX_TCP_HEADER + 16 + sizeof(struct sk_buff);
+ int rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER);
/* Try to select rcvbuf so that 4 mss-sized segments
* will fit to window and corresponding skbs will fit to our rcvbuf.
@@ -540,8 +539,7 @@ void tcp_rcv_space_adjust(struct sock *sk)
space /= tp->advmss;
if (!space)
space = 1;
- rcvmem = (tp->advmss + MAX_TCP_HEADER +
- 16 + sizeof(struct sk_buff));
+ rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER);
while (tcp_win_from_space(rcvmem) < tp->advmss)
rcvmem += 128;
space *= rcvmem;
@@ -4950,8 +4948,10 @@ static void tcp_new_space(struct sock *sk)
struct tcp_sock *tp = tcp_sk(sk);
if (tcp_should_expand_sndbuf(sk)) {
- int sndmem = max_t(u32, tp->rx_opt.mss_clamp, tp->mss_cache) +
- MAX_TCP_HEADER + 16 + sizeof(struct sk_buff);
+ int sndmem = SKB_TRUESIZE(max_t(u32,
+ tp->rx_opt.mss_clamp,
+ tp->mss_cache) +
+ MAX_TCP_HEADER);
int demanded = max_t(unsigned int, tp->snd_cwnd,
tp->reordering + 1);
sndmem *= 2 * demanded;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 2b59154c65d..90868fb4275 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -835,8 +835,7 @@ static int __net_init icmpv6_sk_init(struct net *net)
/* Enough space for 2 64K ICMP packets, including
* sk_buff struct overhead.
*/
- sk->sk_sndbuf =
- (2 * ((64 * 1024) + sizeof(struct sk_buff)));
+ sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
}
return 0;
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index c39f3a43cd8..274d150320c 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1819,7 +1819,7 @@ static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg)
goto save_message;
len = atomic_read(&sk->sk_rmem_alloc);
- len += iucv_msg_length(msg) + sizeof(struct sk_buff);
+ len += SKB_TRUESIZE(iucv_msg_length(msg));
if (len > sk->sk_rcvbuf)
goto save_message;
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 91784f44a2e..61b9fca5a17 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1299,7 +1299,7 @@ SCTP_STATIC __init int sctp_init(void)
max_share = min(4UL*1024*1024, limit);
sysctl_sctp_rmem[0] = SK_MEM_QUANTUM; /* give each asoc 1 page min */
- sysctl_sctp_rmem[1] = (1500 *(sizeof(struct sk_buff) + 1));
+ sysctl_sctp_rmem[1] = 1500 * SKB_TRUESIZE(1);
sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share);
sysctl_sctp_wmem[0] = SK_MEM_QUANTUM;
--
cgit v1.2.3-70-g09d2