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[XFRM]: Export SPD info

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With this patch you can use iproute2 in user space to efficiently see
how many policies exist in different directions.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jamal Hadi Salim 2007-04-28 21:20:32 -07:00 • committed by David S. Miller
parent 5632c5152a
commit ecfd6b1837
4 changed files with 140 additions and 1 deletions
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77
net/xfrm/xfrm_user.c
View file

@ -672,6 +672,81 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
return skb;
}
static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
{
struct xfrm_spdinfo si;
struct nlmsghdr *nlh;
u32 *f;
nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
if (nlh == NULL) /* shouldnt really happen ... */
return -EMSGSIZE;
f = nlmsg_data(nlh);
*f = flags;
xfrm_spd_getinfo(&si);
if (flags & XFRM_SPD_HMASK)
NLA_PUT_U32(skb, XFRMA_SPDHMASK, si.spdhcnt);
if (flags & XFRM_SPD_HMAX)
NLA_PUT_U32(skb, XFRMA_SPDHMAX, si.spdhmcnt);
if (flags & XFRM_SPD_ICNT)
NLA_PUT_U32(skb, XFRMA_SPDICNT, si.incnt);
if (flags & XFRM_SPD_OCNT)
NLA_PUT_U32(skb, XFRMA_SPDOCNT, si.outcnt);
if (flags & XFRM_SPD_FCNT)
NLA_PUT_U32(skb, XFRMA_SPDFCNT, si.fwdcnt);
if (flags & XFRM_SPD_ISCNT)
NLA_PUT_U32(skb, XFRMA_SPDISCNT, si.inscnt);
if (flags & XFRM_SPD_OSCNT)
NLA_PUT_U32(skb, XFRMA_SPDOSCNT, si.inscnt);
if (flags & XFRM_SPD_FSCNT)
NLA_PUT_U32(skb, XFRMA_SPDFSCNT, si.inscnt);
return nlmsg_end(skb, nlh);
nla_put_failure:
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}
static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
struct rtattr **xfrma)
{
struct sk_buff *r_skb;
u32 *flags = NLMSG_DATA(nlh);
u32 spid = NETLINK_CB(skb).pid;
u32 seq = nlh->nlmsg_seq;
int len = NLMSG_LENGTH(sizeof(u32));
if (*flags & XFRM_SPD_HMASK)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_HMAX)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_ICNT)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_OCNT)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_FCNT)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_ISCNT)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_OSCNT)
len += RTA_SPACE(sizeof(u32));
if (*flags & XFRM_SPD_FSCNT)
len += RTA_SPACE(sizeof(u32));
r_skb = alloc_skb(len, GFP_ATOMIC);
if (r_skb == NULL)
return -ENOMEM;
if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
BUG();
return nlmsg_unicast(xfrm_nl, r_skb, spid);
}
static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
{
struct xfrm_sadinfo si;
@ -1879,6 +1954,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
[XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
[XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
[XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
[XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
};
#undef XMSGSIZE
@ -1907,6 +1983,7 @@ static struct xfrm_link {
[XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
[XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
[XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
[XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
};
static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)