With this we eliminate the last hole in struct tcp_sock.
End result:
[EMAIL PROTECTED] net-2.6.20]$ codiff -sV /tmp/tcp.o.before net/ipv4/tcp.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp.c:
struct tcp_sock | -4
tcp_header_len;
from: int /* 1000(0) 4(0) */
to: u16 /* 1000(0) 2(0) */
1 struct changed
[EMAIL PROTECTED] net-2.6.20]$
Now sizeof(tcp_sock) is just...
[EMAIL PROTECTED] net-2.6.20]$ pahole --sizes
../OUTPUT/qemu/net-2.6.20/net/ipv4/tcp.o | grep -w tcp_sock
struct tcp_sock: 1500 0
1500 bytes ;-)
Signed-off-by: Arnaldo Carvalho de Melo <[EMAIL PROTECTED]>
---
include/linux/tcp.h | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index dd61b17..b42ff0e 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -227,7 +227,8 @@ static inline struct tcp_request_sock *t
struct tcp_sock {
/* inet_connection_sock has to be the first member of tcp_sock */
struct inet_connection_sock inet_conn;
- int tcp_header_len; /* Bytes of tcp header to send */
+ u16 tcp_header_len; /* Bytes of tcp header to send */
+ u16 xmit_size_goal; /* Goal for segmenting output packets */
/*
* Header prediction flags
@@ -268,8 +269,6 @@ #endif
__u32 snd_wnd; /* The window we expect to receive */
__u32 max_window; /* Maximal window ever seen from peer */
__u32 mss_cache; /* Cached effective mss, not including SACKS */
- __u16 xmit_size_goal; /* Goal for segmenting output packets */
- /* XXX Two bytes hole, try to pack */
__u32 window_clamp; /* Maximal window to advertise */
__u32 rcv_ssthresh; /* Current window clamp */
--
1.4.2.1.g3d5c
-
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