diff options
| author | Jamal Hadi Salim <hadi@cyberus.ca> | 2010-02-19 02:00:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-19 13:11:50 -0800 |
| commit | 9e64cc9572b43afcbcd2d004538db435f2cd0587 (patch) | |
| tree | 36ccf743338c97b407734f1cfb39b665dd3ce05d /net/xfrm | |
| parent | 8be987d73481831265d7e8c648bec838271bfd9b (diff) | |
| download | lwn-9e64cc9572b43afcbcd2d004538db435f2cd0587.tar.gz lwn-9e64cc9572b43afcbcd2d004538db435f2cd0587.zip | |
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 window2 and you see the flush event on window1.
With this fix, you still get prompt on window1 but no event on window2.
Thanks to Alexey Dobriyan for finding a bug in earlier version
when using pfkey to do the flushing.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_state.c | 8 | ||||
| -rw-r--r-- | net/xfrm/xfrm_user.c | 5 |
2 files changed, 10 insertions, 3 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index c9d6a5f1348d..9fa3322b2a7d 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..cd94a9dd1bad 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1524,8 +1524,11 @@ static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, audit_info.sessionid = NETLINK_CB(skb).sessionid; audit_info.secid = NETLINK_CB(skb).sid; err = xfrm_state_flush(net, p->proto, &audit_info); - if (err) + if (err) { + if (err == -ESRCH) /* empty table */ + return 0; return err; + } c.data.proto = p->proto; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; |