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xfrm: removes a superfluous check and add a statistic 

Remove the check if x->km.state equal to XFRM_STATE_VALID in
xfrm_state_check_expire(), which will be done before call
xfrm_state_check_expire().

add a LINUX_MIB_XFRMOUTSTATEINVALID statistic to record the
outbound error due to invalid xfrm state.

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Li RongQing 2012-12-28 16:06:28 +08:00 committed by Steffen Klassert
parent 483f777266
commit bb65a9cb95
4 changed files with 8 additions and 3 deletions
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1
include/uapi/linux/snmp.h
View File

@ -278,6 +278,7 @@ enum
LINUX_MIB_XFRMOUTPOLDEAD, /* XfrmOutPolDead */
LINUX_MIB_XFRMOUTPOLERROR, /* XfrmOutPolError */
LINUX_MIB_XFRMFWDHDRERROR, /* XfrmFwdHdrError*/
LINUX_MIB_XFRMOUTSTATEINVALID, /* XfrmOutStateInvalid */
__LINUX_MIB_XFRMMAX
};

6
net/xfrm/xfrm_output.c
View File

@ -61,6 +61,12 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
}
spin_lock_bh(&x->lock);
if (unlikely(x->km.state != XFRM_STATE_VALID)) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEINVALID);
goto error_nolock;
}
err = xfrm_state_check_expire(x);
if (err) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEEXPIRED);

1
net/xfrm/xfrm_proc.c
View File

@ -43,6 +43,7 @@ static const struct snmp_mib xfrm_mib_list[] = {
SNMP_MIB_ITEM("XfrmOutPolDead", LINUX_MIB_XFRMOUTPOLDEAD),
SNMP_MIB_ITEM("XfrmOutPolError", LINUX_MIB_XFRMOUTPOLERROR),
SNMP_MIB_ITEM("XfrmFwdHdrError", LINUX_MIB_XFRMFWDHDRERROR),
SNMP_MIB_ITEM("XfrmOutStateInvalid", LINUX_MIB_XFRMOUTSTATEINVALID),
SNMP_MIB_SENTINEL
};

3
net/xfrm/xfrm_state.c
View File

@ -1370,9 +1370,6 @@ int xfrm_state_check_expire(struct xfrm_state *x)
if (!x->curlft.use_time)
x->curlft.use_time = get_seconds();
if (x->km.state != XFRM_STATE_VALID)
return -EINVAL;
if (x->curlft.bytes >= x->lft.hard_byte_limit ||
x->curlft.packets >= x->lft.hard_packet_limit) {
x->km.state = XFRM_STATE_EXPIRED;