net: Remove FLOWI_FLAG_CAN_SLEEP

FLOWI_FLAG_CAN_SLEEP was used to notify xfrm about the posibility
to sleep until the needed states are resolved. This code is gone,
so FLOWI_FLAG_CAN_SLEEP is not needed anymore.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

22 files changed, 31 insertions, 46 deletions

diff --git a/include/net/flow.h b/include/net/flow.h
index 65ce471d2ab5..d23e7fa2042e 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -20,8 +20,7 @@ struct flowi_common {
         __u8    flowic_proto;
         __u8    flowic_flags;
 #define FLOWI_FLAG_ANYSRC               0x01
-#define FLOWI_FLAG_CAN_SLEEP            0x02
-#define FLOWI_FLAG_KNOWN_NH             0x04
+#define FLOWI_FLAG_KNOWN_NH             0x02
         __u32   flowic_secid;
 };
 
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index eb198acaac1d..26c4199ddc36 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -711,11 +711,9 @@ void ip6_flush_pending_frames(struct sock *sk);
 
 int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6);
 struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
-                                      const struct in6_addr *final_dst,
-                                      bool can_sleep);
+                                      const struct in6_addr *final_dst);
 struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
-                                         const struct in6_addr *final_dst,
-                                         bool can_sleep);
+                                         const struct in6_addr *final_dst);
 struct dst_entry *ip6_blackhole_route(struct net *net,
                                       struct dst_entry *orig_dst);
 
diff --git a/include/net/route.h b/include/net/route.h
index f68c167280a7..638e3ebf76f3 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -239,14 +239,12 @@ static inline char rt_tos2priority(u8 tos)
 static inline void ip_route_connect_init(struct flowi4 *fl4, __be32 dst, __be32 src,
                                          u32 tos, int oif, u8 protocol,
                                          __be16 sport, __be16 dport,
-                                         struct sock *sk, bool can_sleep)
+                                         struct sock *sk)
 {
         __u8 flow_flags = 0;
 
         if (inet_sk(sk)->transparent)
                 flow_flags |= FLOWI_FLAG_ANYSRC;
-        if (can_sleep)
-                flow_flags |= FLOWI_FLAG_CAN_SLEEP;
 
         flowi4_init_output(fl4, oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE,
                            protocol, flow_flags, dst, src, dport, sport);
@@ -256,13 +254,13 @@ static inline struct rtable *ip_route_connect(struct flowi4 *fl4,
                                               __be32 dst, __be32 src, u32 tos,
                                               int oif, u8 protocol,
                                               __be16 sport, __be16 dport,
-                                              struct sock *sk, bool can_sleep)
+                                              struct sock *sk)
 {
         struct net *net = sock_net(sk);
         struct rtable *rt;
 
         ip_route_connect_init(fl4, dst, src, tos, oif, protocol,
-                              sport, dport, sk, can_sleep);
+                              sport, dport, sk);
 
         if (!dst || !src) {
                 rt = __ip_route_output_key(net, fl4);
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index d9f65fc66db5..88299c29101d 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -75,7 +75,7 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
         rt = ip_route_connect(fl4, nexthop, inet->inet_saddr,
                               RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
                               IPPROTO_DCCP,
-                              orig_sport, orig_dport, sk, true);
+                              orig_sport, orig_dport, sk);
         if (IS_ERR(rt))
                 return PTR_ERR(rt);
 
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 4ac71ff7c2e4..699a2d2a35ea 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -237,7 +237,7 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req)
 
         final_p = fl6_update_dst(&fl6, np->opt, &final);
 
-        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
+        dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
                 dst = NULL;
@@ -301,7 +301,7 @@ static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
         security_skb_classify_flow(rxskb, flowi6_to_flowi(&fl6));
 
         /* sk = NULL, but it is safe for now. RST socket required. */
-        dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false);
+        dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL);
         if (!IS_ERR(dst)) {
                 skb_dst_set(skb, dst);
                 ip6_xmit(ctl_sk, skb, &fl6, NULL, 0);
@@ -512,7 +512,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
                 fl6.fl6_sport = htons(ireq->ir_num);
                 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
-                dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
+                dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
                 if (IS_ERR(dst))
                         goto out;
         }
@@ -932,7 +932,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 
         final_p = fl6_update_dst(&fl6, np->opt, &final);
 
-        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
+        dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
                 goto failure;
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index fe32388ea24f..ad2efa5b861b 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -1288,8 +1288,6 @@ int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *fl, stru
 
         err = __dn_route_output_key(pprt, fl, flags & MSG_TRYHARD);
         if (err == 0 && fl->flowidn_proto) {
-                if (!(flags & MSG_DONTWAIT))
-                        fl->flowidn_flags |= FLOWI_FLAG_CAN_SLEEP;
                 *pprt = xfrm_lookup(&init_net, *pprt,
                                     flowidn_to_flowi(fl), sk, 0);
                 if (IS_ERR(*pprt)) {
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 70011e029ac1..4f6d50bda093 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1133,7 +1133,7 @@ static int inet_sk_reselect_saddr(struct sock *sk)
         fl4 = &inet->cork.fl.u.ip4;
         rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
                               sk->sk_bound_dev_if, sk->sk_protocol,
-                              inet->inet_sport, inet->inet_dport, sk, false);
+                              inet->inet_sport, inet->inet_dport, sk);
         if (IS_ERR(rt))
                 return PTR_ERR(rt);
 
diff --git a/net/ipv4/datagram.c b/net/ipv4/datagram.c
index 19e36376d2a0..8b5134c582f1 100644
--- a/net/ipv4/datagram.c
+++ b/net/ipv4/datagram.c
@@ -53,7 +53,7 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
         rt = ip_route_connect(fl4, usin->sin_addr.s_addr, saddr,
                               RT_CONN_FLAGS(sk), oif,
                               sk->sk_protocol,
-                              inet->inet_sport, usin->sin_port, sk, true);
+                              inet->inet_sport, usin->sin_port, sk);
         if (IS_ERR(rt)) {
                 err = PTR_ERR(rt);
                 if (err == -ENETUNREACH)
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 23c3e5b5bb53..81e6cfd5a365 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -575,7 +575,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
         flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
                            RT_SCOPE_UNIVERSE,
                            inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
-                           inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP |
+                           inet_sk_flowi_flags(sk) |
                             (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0),
                            daddr, saddr, 0, 0);
 
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 067213924751..bbaf8cb45eb2 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -173,7 +173,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
         rt = ip_route_connect(fl4, nexthop, inet->inet_saddr,
                               RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
                               IPPROTO_TCP,
-                              orig_sport, orig_dport, sk, true);
+                              orig_sport, orig_dport, sk);
         if (IS_ERR(rt)) {
                 err = PTR_ERR(rt);
                 if (err == -ENETUNREACH)
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 44f6a20fa29d..480fb95df2b6 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -990,7 +990,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
                 fl4 = &fl4_stack;
                 flowi4_init_output(fl4, ipc.oif, sk->sk_mark, tos,
                                    RT_SCOPE_UNIVERSE, sk->sk_protocol,
-                                   inet_sk_flowi_flags(sk)|FLOWI_FLAG_CAN_SLEEP,
+                                   inet_sk_flowi_flags(sk),
                                    faddr, saddr, dport, inet->inet_sport);
 
                 security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 4fbdb7046d28..c33f98a4cf72 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -661,7 +661,7 @@ int inet6_sk_rebuild_header(struct sock *sk)
 
                 final_p = fl6_update_dst(&fl6, np->opt, &final);
 
-                dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
+                dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
                 if (IS_ERR(dst)) {
                         sk->sk_route_caps = 0;
                         sk->sk_err_soft = -PTR_ERR(dst);
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 8dfe1f4d3c1a..d7ef682cd984 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -171,7 +171,7 @@ ipv4_connected:
         opt = flowlabel ? flowlabel->opt : np->opt;
         final_p = fl6_update_dst(&fl6, opt, &final);
 
-        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
+        dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
         err = 0;
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index 77bb8afb141d..c9138189415a 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -86,7 +86,7 @@ struct dst_entry *inet6_csk_route_req(struct sock *sk,
         fl6->fl6_sport = htons(ireq->ir_num);
         security_req_classify_flow(req, flowi6_to_flowi(fl6));
 
-        dst = ip6_dst_lookup_flow(sk, fl6, final_p, false);
+        dst = ip6_dst_lookup_flow(sk, fl6, final_p);
         if (IS_ERR(dst))
                 return NULL;
 
@@ -216,7 +216,7 @@ static struct dst_entry *inet6_csk_route_socket(struct sock *sk,
 
         dst = __inet6_csk_dst_check(sk, np->dst_cookie);
         if (!dst) {
-                dst = ip6_dst_lookup_flow(sk, fl6, final_p, false);
+                dst = ip6_dst_lookup_flow(sk, fl6, final_p);
 
                 if (!IS_ERR(dst))
                         __inet6_csk_dst_store(sk, dst, NULL, NULL);
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 4acdb63495db..3915cd883657 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -938,7 +938,6 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup);
  *      @sk: socket which provides route info
  *      @fl6: flow to lookup
  *      @final_dst: final destination address for ipsec lookup
- *      @can_sleep: we are in a sleepable context
  *
  *      This function performs a route lookup on the given flow.
  *
@@ -946,8 +945,7 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup);
  *      error code.
  */
 struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
-                                      const struct in6_addr *final_dst,
-                                      bool can_sleep)
+                                      const struct in6_addr *final_dst)
 {
         struct dst_entry *dst = NULL;
         int err;
@@ -957,8 +955,6 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
                 return ERR_PTR(err);
         if (final_dst)
                 fl6->daddr = *final_dst;
-        if (can_sleep)
-                fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
         return xfrm_lookup(sock_net(sk), dst, flowi6_to_flowi(fl6), sk, 0);
 }
@@ -969,7 +965,6 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup_flow);
  *      @sk: socket which provides the dst cache and route info
  *      @fl6: flow to lookup
  *      @final_dst: final destination address for ipsec lookup
- *      @can_sleep: we are in a sleepable context
  *
  *      This function performs a route lookup on the given flow with the
  *      possibility of using the cached route in the socket if it is valid.
@@ -980,8 +975,7 @@ EXPORT_SYMBOL_GPL(ip6_dst_lookup_flow);
  *      error code.
  */
 struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
-                                         const struct in6_addr *final_dst,
-                                         bool can_sleep)
+                                         const struct in6_addr *final_dst)
 {
         struct dst_entry *dst = sk_dst_check(sk, inet6_sk(sk)->dst_cookie);
         int err;
@@ -993,8 +987,6 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
                 return ERR_PTR(err);
         if (final_dst)
                 fl6->daddr = *final_dst;
-        if (can_sleep)
-                fl6->flowi6_flags |= FLOWI_FLAG_CAN_SLEEP;
 
         return xfrm_lookup(sock_net(sk), dst, flowi6_to_flowi(fl6), sk, 0);
 }
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index a83243c3d656..15d23b8c2129 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -145,7 +145,7 @@ int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
         else if (!fl6.flowi6_oif)
                 fl6.flowi6_oif = np->ucast_oif;
 
-        dst = ip6_sk_dst_lookup_flow(sk, &fl6,  daddr, 1);
+        dst = ip6_sk_dst_lookup_flow(sk, &fl6,  daddr);
         if (IS_ERR(dst))
                 return PTR_ERR(dst);
         rt = (struct rt6_info *) dst;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 7fb4e14c467f..4945fb6d60a2 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -865,7 +865,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
                 fl6.flowi6_oif = np->ucast_oif;
         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
-        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
+        dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
                 goto out;
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 535a3ad262f1..bb53a5e73c1a 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -247,7 +247,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
                 fl6.fl6_sport = inet_sk(sk)->inet_sport;
                 security_req_classify_flow(req, flowi6_to_flowi(&fl6));
 
-                dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
+                dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
                 if (IS_ERR(dst))
                         goto out_free;
         }
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 0740f93a114a..f14456f40d02 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -258,7 +258,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 
         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
-        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
+        dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
                 goto failure;
@@ -801,7 +801,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
          * Underlying function will use this to retrieve the network
          * namespace
          */
-        dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false);
+        dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL);
         if (!IS_ERR(dst)) {
                 skb_dst_set(buff, dst);
                 ip6_xmit(ctl_sk, buff, &fl6, NULL, tclass);
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index bcd5699313c3..ec3eb7f3f87c 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1221,7 +1221,7 @@ do_udp_sendmsg:
 
         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
-        dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true);
+        dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p);
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
                 dst = NULL;
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index d9b437e55007..0c231f676049 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -598,7 +598,7 @@ static int l2tp_ip6_sendmsg(struct kiocb *iocb, struct sock *sk,
 
         security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
 
-        dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true);
+        dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
         if (IS_ERR(dst)) {
                 err = PTR_ERR(dst);
                 goto out;
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 7567e6f1a920..dd15caec154d 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -263,7 +263,7 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
         }
 
         final_p = fl6_update_dst(fl6, np->opt, &final);
-        dst = ip6_dst_lookup_flow(sk, fl6, final_p, false);
+        dst = ip6_dst_lookup_flow(sk, fl6, final_p);
         if (!asoc || saddr)
                 goto out;
 
@@ -322,7 +322,7 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
                 fl6->saddr = baddr->v6.sin6_addr;
                 fl6->fl6_sport = baddr->v6.sin6_port;
                 final_p = fl6_update_dst(fl6, np->opt, &final);
-                dst = ip6_dst_lookup_flow(sk, fl6, final_p, false);
+                dst = ip6_dst_lookup_flow(sk, fl6, final_p);
         }
 
 out: