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Merge branch 'tipc-next'

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Menglong Dong says:

====================
net: tipc: fix FB_MTU eat two pages and do some code cleanup

In the first patch, FB_MTU is redefined to make sure data size will not
exceed PAGE_SIZE. Besides, I removed the alignment for buf_size in
tipc_buf_acquire, because skb_alloc_fclone will do the alignment job.

In the second patch, I removed align() in msg.c and replace it with
ALIGN().

Changes since V5:
- remove blank line after Fixes in commit log in the first patch

Changes since V4:
- remove ONE_PAGE_SKB_SZ and replace it with one_page_mtu in the first
  patch.
- fix some code style problems for the second patch.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2021-06-28 13:31:57 -07:00
commit c948b46a7d
3 changed files with 14 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/tipc/bcast.c
View File

@ -699,7 +699,7 @@ int tipc_bcast_init(struct net *net)
spin_lock_init(&tipc_net(net)->bclock);
if (!tipc_link_bc_create(net, 0, 0, NULL,
FB_MTU,
one_page_mtu,
BCLINK_WIN_DEFAULT,
BCLINK_WIN_DEFAULT,
0,

27
net/tipc/msg.c
View File

@ -41,19 +41,18 @@
#include "name_table.h"
#include "crypto.h"
#define BUF_ALIGN(x) ALIGN(x, 4)
#define MAX_FORWARD_SIZE 1024
#ifdef CONFIG_TIPC_CRYPTO
#define BUF_HEADROOM ALIGN(((LL_MAX_HEADER + 48) + EHDR_MAX_SIZE), 16)
#define BUF_TAILROOM (TIPC_AES_GCM_TAG_SIZE)
#define BUF_OVERHEAD (BUF_HEADROOM + TIPC_AES_GCM_TAG_SIZE)
#else
#define BUF_HEADROOM (LL_MAX_HEADER + 48)
#define BUF_TAILROOM 16
#define BUF_OVERHEAD BUF_HEADROOM
#endif
static unsigned int align(unsigned int i)
{
return (i + 3) & ~3u;
}
const int one_page_mtu = PAGE_SIZE - SKB_DATA_ALIGN(BUF_OVERHEAD) -
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
/**
* tipc_buf_acquire - creates a TIPC message buffer
@ -69,13 +68,8 @@ static unsigned int align(unsigned int i)
struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp)
{
struct sk_buff *skb;
#ifdef CONFIG_TIPC_CRYPTO
unsigned int buf_size = (BUF_HEADROOM + size + BUF_TAILROOM + 3) & ~3u;
#else
unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
#endif
skb = alloc_skb_fclone(buf_size, gfp);
skb = alloc_skb_fclone(BUF_OVERHEAD + size, gfp);
if (skb) {
skb_reserve(skb, BUF_HEADROOM);
skb_put(skb, size);
@ -395,7 +389,8 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, int offset,
if (unlikely(!skb)) {
if (pktmax != MAX_MSG_SIZE)
return -ENOMEM;
rc = tipc_msg_build(mhdr, m, offset, dsz, FB_MTU, list);
rc = tipc_msg_build(mhdr, m, offset, dsz,
one_page_mtu, list);
if (rc != dsz)
return rc;
if (tipc_msg_assemble(list))
@ -490,7 +485,7 @@ static bool tipc_msg_bundle(struct sk_buff *bskb, struct tipc_msg *msg,
msz = msg_size(msg);
bsz = msg_size(bmsg);
offset = align(bsz);
offset = BUF_ALIGN(bsz);
pad = offset - bsz;
if (unlikely(skb_tailroom(bskb) < (pad + msz)))
@ -547,7 +542,7 @@ bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
/* Make a new bundle of the two messages if possible */
tsz = msg_size(buf_msg(tskb));
if (unlikely(mss < align(INT_H_SIZE + tsz) + msg_size(msg)))
if (unlikely(mss < BUF_ALIGN(INT_H_SIZE + tsz) + msg_size(msg)))
return true;
if (unlikely(pskb_expand_head(tskb, INT_H_SIZE, mss - tsz - INT_H_SIZE,
GFP_ATOMIC)))
@ -606,7 +601,7 @@ bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos)
if (unlikely(!tipc_msg_validate(iskb)))
goto none;
*pos += align(imsz);
*pos += BUF_ALIGN(imsz);
return true;
none:
kfree_skb(skb);

3
net/tipc/msg.h
View File

@ -99,9 +99,10 @@ struct plist;
#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
#define FB_MTU 3744
#define TIPC_MEDIA_INFO_OFFSET 5
extern const int one_page_mtu;
struct tipc_skb_cb {
union {
struct {