diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2010-03-18 17:24:42 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-21 00:29:03 +0300 |
| commit | 1a50307ba1826e4da0024e64b245ce4eadf7688a (patch) | |
| tree | 48c0b788b925d6ae0877f5b95f5e0794ce0601a7 /net/netlink | |
| parent | 73852e8151b7d7a529fbe019ab6d2d0c02d8f3f2 (diff) | |
| download | linux-1a50307ba1826e4da0024e64b245ce4eadf7688a.tar.xz | |
netlink: fix NETLINK_RECV_NO_ENOBUFS in netlink_set_err()
Currently, ENOBUFS errors are reported to the socket via
netlink_set_err() even if NETLINK_RECV_NO_ENOBUFS is set. However,
that should not happen. This fixes this problem and it changes the
prototype of netlink_set_err() to return the number of sockets that
have set the NETLINK_RECV_NO_ENOBUFS socket option. This return
value is used in the next patch in these bugfix series.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
| -rw-r--r-- | net/netlink/af_netlink.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 320d0423a240..acbbae1e89b5 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1093,6 +1093,7 @@ static inline int do_one_set_err(struct sock *sk, struct netlink_set_err_data *p) { struct netlink_sock *nlk = nlk_sk(sk); + int ret = 0; if (sk == p->exclude_sk) goto out; @@ -1104,10 +1105,15 @@ static inline int do_one_set_err(struct sock *sk, !test_bit(p->group - 1, nlk->groups)) goto out; + if (p->code == ENOBUFS && nlk->flags & NETLINK_RECV_NO_ENOBUFS) { + ret = 1; + goto out; + } + sk->sk_err = p->code; sk->sk_error_report(sk); out: - return 0; + return ret; } /** @@ -1116,12 +1122,16 @@ out: * @pid: the PID of a process that we want to skip (if any) * @groups: the broadcast group that will notice the error * @code: error code, must be negative (as usual in kernelspace) + * + * This function returns the number of broadcast listeners that have set the + * NETLINK_RECV_NO_ENOBUFS socket option. */ -void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code) +int netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code) { struct netlink_set_err_data info; struct hlist_node *node; struct sock *sk; + int ret = 0; info.exclude_sk = ssk; info.pid = pid; @@ -1132,9 +1142,10 @@ void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code) read_lock(&nl_table_lock); sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list) - do_one_set_err(sk, &info); + ret += do_one_set_err(sk, &info); read_unlock(&nl_table_lock); + return ret; } EXPORT_SYMBOL(netlink_set_err); |