From 19f4c7133fc1b94001b997c4843d0a9192ee63e5 Mon Sep 17 00:00:00 2001 From: jamal Date: Wed, 10 Feb 2010 23:51:27 +0000 Subject: [PATCH] xfrm: Flushing empty SAD generates false events To see the effect make sure you have an empty SAD. -On window1 "ip xfrm mon" -on window2 issue "ip xfrm state flush" You get prompt back in window1 and you see the flush event on window2. With this fix, you still get prompt on window1 but no event on window2. I was tempted to return -ESRCH on window1 (which would show "RTNETLINK answers: No such process") but didnt want to change current behavior. cheers, jamal commit 5f3dd4a772326166e1bcf54acc2391df00dc7ab5 Author: Jamal Hadi Salim Date: Thu Feb 11 04:41:36 2010 -0500 xfrm: Flushing empty SAD generates false events To see the effect make sure you have an empty SAD. On window1 "ip xfrm mon" and on window2 issue "ip xfrm state flush" You get prompt back in window1 and you see the flush event on window2. With this fix, you still get prompt on window1 but no event on window2. Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/key/af_key.c | 2 +- net/xfrm/xfrm_state.c | 8 ++++++-- net/xfrm/xfrm_user.c | 2 +- 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/net/key/af_key.c b/net/key/af_key.c index 79d2c0f3c334..9d47a6aa53dc 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1751,7 +1751,7 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd audit_info.secid = 0; err = xfrm_state_flush(net, proto, &audit_info); if (err) - return err; + return 0; c.data.proto = proto; c.seq = hdr->sadb_msg_seq; c.pid = hdr->sadb_msg_pid; diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index b36cc344474b..f50ee9badf47 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -603,13 +603,14 @@ xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audi int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) { - int i, err = 0; + int i, err = 0, cnt = 0; spin_lock_bh(&xfrm_state_lock); err = xfrm_state_flush_secctx_check(net, proto, audit_info); if (err) goto out; + err = -ESRCH; for (i = 0; i <= net->xfrm.state_hmask; i++) { struct hlist_node *entry; struct xfrm_state *x; @@ -626,13 +627,16 @@ restart: audit_info->sessionid, audit_info->secid); xfrm_state_put(x); + if (!err) + cnt++; spin_lock_bh(&xfrm_state_lock); goto restart; } } } - err = 0; + if (cnt) + err = 0; out: spin_unlock_bh(&xfrm_state_lock); diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 943c8712bd97..7c8700447040 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1525,7 +1525,7 @@ static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, audit_info.secid = NETLINK_CB(skb).sid; err = xfrm_state_flush(net, p->proto, &audit_info); if (err) - return err; + return 0; c.data.proto = p->proto; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; -- 2.20.1