Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

 * Fix include order for bison/flex-generated C files, from Ben Hutchings

 * Build fixes and documentation corrections from David Ahern

 * Group parsing support, from Jiri Olsa

 * UI/gtk refactorings and improvements from Namhyung Kim

 * NULL deref fix for perf script, from Namhyung Kim

 * Assorted cleanups from Robert Richter

 * Let O= makes handle relative paths, from Steven Rostedt

 * perf script python fixes, from Feng Tang.

 * Improve 'perf lock' error message when the needed tracepoints
   are not present, from David Ahern.

 * Initial bash completion support, from Frederic Weisbecker

 * Allow building without libelf, from Namhyung Kim.

 * Support DWARF CFI based unwind to have callchains when %bp
   based unwinding is not possible, from Jiri Olsa.

 * Symbol resolution fixes, while fixing support PPC64 files with an .opt ELF
   section was the end goal, several fixes for code that handles all
   architectures and cleanups are included, from Cody Schafer.

 * Add a description for the JIT interface, from Andi Kleen.

 * Assorted fixes for Documentation and build in 32 bit, from Robert Richter

 * Add support for non-tracepoint events in perf script python, from Feng Tang

 * Cache the libtraceevent event_format associated to each evsel early, so that we
   avoid relookups, i.e. calling pevent_find_event repeatedly when processing
   tracepoint events.

   [ This is to reduce the surface contact with libtraceevents and make clear what
     is that the perf tools needs from that lib: so far parsing the common and per
     event fields. ]

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 97 insertions, 47 deletions

diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 586302e557a..85a3604c87c 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -114,10 +114,16 @@ static struct dst_entry *dn_dst_check(struct dst_entry *, __u32);
 static unsigned int dn_dst_default_advmss(const struct dst_entry *dst);
 static unsigned int dn_dst_mtu(const struct dst_entry *dst);
 static void dn_dst_destroy(struct dst_entry *);
+static void dn_dst_ifdown(struct dst_entry *, struct net_device *dev, int how);
 static struct dst_entry *dn_dst_negative_advice(struct dst_entry *);
 static void dn_dst_link_failure(struct sk_buff *);
-static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu);
-static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, const void *daddr);
+static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk,
+			       struct sk_buff *skb , u32 mtu);
+static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk,
+			    struct sk_buff *skb);
+static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst,
+					     struct sk_buff *skb,
+					     const void *daddr);
 static int dn_route_input(struct sk_buff *);
 static void dn_run_flush(unsigned long dummy);
 
@@ -138,17 +144,37 @@ static struct dst_ops dn_dst_ops = {
 	.mtu =			dn_dst_mtu,
 	.cow_metrics =		dst_cow_metrics_generic,
 	.destroy =		dn_dst_destroy,
+	.ifdown =		dn_dst_ifdown,
 	.negative_advice =	dn_dst_negative_advice,
 	.link_failure =		dn_dst_link_failure,
 	.update_pmtu =		dn_dst_update_pmtu,
+	.redirect =		dn_dst_redirect,
 	.neigh_lookup =		dn_dst_neigh_lookup,
 };
 
 static void dn_dst_destroy(struct dst_entry *dst)
 {
+	struct dn_route *rt = (struct dn_route *) dst;
+
+	if (rt->n)
+		neigh_release(rt->n);
 	dst_destroy_metrics_generic(dst);
 }
 
+static void dn_dst_ifdown(struct dst_entry *dst, struct net_device *dev, int how)
+{
+	if (how) {
+		struct dn_route *rt = (struct dn_route *) dst;
+		struct neighbour *n = rt->n;
+
+		if (n && n->dev == dev) {
+			n->dev = dev_net(dev)->loopback_dev;
+			dev_hold(n->dev);
+			dev_put(dev);
+		}
+	}
+}
+
 static __inline__ unsigned int dn_hash(__le16 src, __le16 dst)
 {
 	__u16 tmp = (__u16 __force)(src ^ dst);
@@ -242,9 +268,11 @@ static int dn_dst_gc(struct dst_ops *ops)
  * We update both the mtu and the advertised mss (i.e. the segment size we
  * advertise to the other end).
  */
-static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu)
+static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk,
+			       struct sk_buff *skb, u32 mtu)
 {
-	struct neighbour *n = dst_get_neighbour_noref(dst);
+	struct dn_route *rt = (struct dn_route *) dst;
+	struct neighbour *n = rt->n;
 	u32 min_mtu = 230;
 	struct dn_dev *dn;
 
@@ -269,6 +297,11 @@ static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu)
 	}
 }
 
+static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk,
+			    struct sk_buff *skb)
+{
+}
+
 /*
  * When a route has been marked obsolete. (e.g. routing cache flush)
  */
@@ -713,7 +746,8 @@ out:
 static int dn_to_neigh_output(struct sk_buff *skb)
 {
 	struct dst_entry *dst = skb_dst(skb);
-	struct neighbour *n = dst_get_neighbour_noref(dst);
+	struct dn_route *rt = (struct dn_route *) dst;
+	struct neighbour *n = rt->n;
 
 	return n->output(n, skb);
 }
@@ -727,7 +761,7 @@ static int dn_output(struct sk_buff *skb)
 
 	int err = -EINVAL;
 
-	if (dst_get_neighbour_noref(dst) == NULL)
+	if (rt->n == NULL)
 		goto error;
 
 	skb->dev = dev;
@@ -828,7 +862,9 @@ static unsigned int dn_dst_mtu(const struct dst_entry *dst)
 	return mtu ? : dst->dev->mtu;
 }
 
-static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, const void *daddr)
+static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst,
+					     struct sk_buff *skb,
+					     const void *daddr)
 {
 	return __neigh_lookup_errno(&dn_neigh_table, daddr, dst->dev);
 }
@@ -848,11 +884,11 @@ static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res)
 	}
 	rt->rt_type = res->type;
 
-	if (dev != NULL && dst_get_neighbour_noref(&rt->dst) == NULL) {
+	if (dev != NULL && rt->n == NULL) {
 		n = __neigh_lookup_errno(&dn_neigh_table, &rt->rt_gateway, dev);
 		if (IS_ERR(n))
 			return PTR_ERR(n);
-		dst_set_neighbour(&rt->dst, n);
+		rt->n = n;
 	}
 
 	if (dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu)
@@ -1140,7 +1176,7 @@ make_route:
 	if (dev_out->flags & IFF_LOOPBACK)
 		flags |= RTCF_LOCAL;
 
-	rt = dst_alloc(&dn_dst_ops, dev_out, 1, 0, DST_HOST);
+	rt = dst_alloc(&dn_dst_ops, dev_out, 1, DST_OBSOLETE_NONE, DST_HOST);
 	if (rt == NULL)
 		goto e_nobufs;
 
@@ -1159,7 +1195,7 @@ make_route:
 	rt->rt_dst_map    = fld.daddr;
 	rt->rt_src_map    = fld.saddr;
 
-	dst_set_neighbour(&rt->dst, neigh);
+	rt->n = neigh;
 	neigh = NULL;
 
 	rt->dst.lastuse = jiffies;
@@ -1388,7 +1424,6 @@ static int dn_route_input_slow(struct sk_buff *skb)
 		/* Packet was intra-ethernet, so we know its on-link */
 		if (cb->rt_flags & DN_RT_F_IE) {
 			gateway = cb->src;
-			flags |= RTCF_DIRECTSRC;
 			goto make_route;
 		}
 
@@ -1401,14 +1436,13 @@ static int dn_route_input_slow(struct sk_buff *skb)
 
 		/* Close eyes and pray */
 		gateway = cb->src;
-		flags |= RTCF_DIRECTSRC;
 		goto make_route;
 	default:
 		goto e_inval;
 	}
 
 make_route:
-	rt = dst_alloc(&dn_dst_ops, out_dev, 0, 0, DST_HOST);
+	rt = dst_alloc(&dn_dst_ops, out_dev, 0, DST_OBSOLETE_NONE, DST_HOST);
 	if (rt == NULL)
 		goto e_nobufs;
 
@@ -1429,7 +1463,7 @@ make_route:
 	rt->fld.flowidn_iif  = in_dev->ifindex;
 	rt->fld.flowidn_mark = fld.flowidn_mark;
 
-	dst_set_neighbour(&rt->dst, neigh);
+	rt->n = neigh;
 	rt->dst.lastuse = jiffies;
 	rt->dst.output = dn_rt_bug;
 	switch (res.type) {
@@ -1515,54 +1549,68 @@ static int dn_rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
 	struct dn_route *rt = (struct dn_route *)skb_dst(skb);
 	struct rtmsg *r;
 	struct nlmsghdr *nlh;
-	unsigned char *b = skb_tail_pointer(skb);
 	long expires;
 
-	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
-	r = NLMSG_DATA(nlh);
+	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
+	if (!nlh)
+		return -EMSGSIZE;
+
+	r = nlmsg_data(nlh);
 	r->rtm_family = AF_DECnet;
 	r->rtm_dst_len = 16;
 	r->rtm_src_len = 0;
 	r->rtm_tos = 0;
 	r->rtm_table = RT_TABLE_MAIN;
-	RTA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
 	r->rtm_type = rt->rt_type;
 	r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED;
 	r->rtm_scope = RT_SCOPE_UNIVERSE;
 	r->rtm_protocol = RTPROT_UNSPEC;
+
 	if (rt->rt_flags & RTCF_NOTIFY)
 		r->rtm_flags |= RTM_F_NOTIFY;
-	RTA_PUT(skb, RTA_DST, 2, &rt->rt_daddr);
+
+	if (nla_put_u32(skb, RTA_TABLE, RT_TABLE_MAIN) < 0 ||
+	    nla_put_le16(skb, RTA_DST, rt->rt_daddr) < 0)
+		goto errout;
+
 	if (rt->fld.saddr) {
 		r->rtm_src_len = 16;
-		RTA_PUT(skb, RTA_SRC, 2, &rt->fld.saddr);
+		if (nla_put_le16(skb, RTA_SRC, rt->fld.saddr) < 0)
+			goto errout;
 	}
-	if (rt->dst.dev)
-		RTA_PUT(skb, RTA_OIF, sizeof(int), &rt->dst.dev->ifindex);
+	if (rt->dst.dev &&
+	    nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex) < 0)
+		goto errout;
+
 	/*
 	 * Note to self - change this if input routes reverse direction when
 	 * they deal only with inputs and not with replies like they do
 	 * currently.
 	 */
-	RTA_PUT(skb, RTA_PREFSRC, 2, &rt->rt_local_src);
-	if (rt->rt_daddr != rt->rt_gateway)
-		RTA_PUT(skb, RTA_GATEWAY, 2, &rt->rt_gateway);
+	if (nla_put_le16(skb, RTA_PREFSRC, rt->rt_local_src) < 0)
+		goto errout;
+
+	if (rt->rt_daddr != rt->rt_gateway &&
+	    nla_put_le16(skb, RTA_GATEWAY, rt->rt_gateway) < 0)
+		goto errout;
+
 	if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
-		goto rtattr_failure;
+		goto errout;
+
 	expires = rt->dst.expires ? rt->dst.expires - jiffies : 0;
-	if (rtnl_put_cacheinfo(skb, &rt->dst, 0, 0, 0, expires,
+	if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires,
 			       rt->dst.error) < 0)
-		goto rtattr_failure;
-	if (dn_is_input_route(rt))
-		RTA_PUT(skb, RTA_IIF, sizeof(int), &rt->fld.flowidn_iif);
+		goto errout;
 
-	nlh->nlmsg_len = skb_tail_pointer(skb) - b;
-	return skb->len;
+	if (dn_is_input_route(rt) &&
+	    nla_put_u32(skb, RTA_IIF, rt->fld.flowidn_iif) < 0)
+		goto errout;
 
-nlmsg_failure:
-rtattr_failure:
-	nlmsg_trim(skb, b);
-	return -1;
+	return nlmsg_end(skb, nlh);
+
+errout:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
 }
 
 /*
@@ -1572,7 +1620,7 @@ static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void
 {
 	struct net *net = sock_net(in_skb->sk);
 	struct rtattr **rta = arg;
-	struct rtmsg *rtm = NLMSG_DATA(nlh);
+	struct rtmsg *rtm = nlmsg_data(nlh);
 	struct dn_route *rt = NULL;
 	struct dn_skb_cb *cb;
 	int err;
@@ -1585,7 +1633,7 @@ static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void
 	memset(&fld, 0, sizeof(fld));
 	fld.flowidn_proto = DNPROTO_NSP;
 
-	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
+	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (skb == NULL)
 		return -ENOBUFS;
 	skb_reset_mac_header(skb);
@@ -1663,13 +1711,16 @@ int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb)
 	struct dn_route *rt;
 	int h, s_h;
 	int idx, s_idx;
+	struct rtmsg *rtm;
 
 	if (!net_eq(net, &init_net))
 		return 0;
 
-	if (NLMSG_PAYLOAD(cb->nlh, 0) < sizeof(struct rtmsg))
+	if (nlmsg_len(cb->nlh) < sizeof(struct rtmsg))
 		return -EINVAL;
-	if (!(((struct rtmsg *)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED))
+
+	rtm = nlmsg_data(cb->nlh);
+	if (!(rtm->rtm_flags & RTM_F_CLONED))
 		return 0;
 
 	s_h = cb->args[0];
@@ -1769,12 +1820,11 @@ static int dn_rt_cache_seq_show(struct seq_file *seq, void *v)
 	char buf1[DN_ASCBUF_LEN], buf2[DN_ASCBUF_LEN];
 
 	seq_printf(seq, "%-8s %-7s %-7s %04d %04d %04d\n",
-			rt->dst.dev ? rt->dst.dev->name : "*",
-			dn_addr2asc(le16_to_cpu(rt->rt_daddr), buf1),
-			dn_addr2asc(le16_to_cpu(rt->rt_saddr), buf2),
-			atomic_read(&rt->dst.__refcnt),
-			rt->dst.__use,
-			(int) dst_metric(&rt->dst, RTAX_RTT));
+		   rt->dst.dev ? rt->dst.dev->name : "*",
+		   dn_addr2asc(le16_to_cpu(rt->rt_daddr), buf1),
+		   dn_addr2asc(le16_to_cpu(rt->rt_saddr), buf2),
+		   atomic_read(&rt->dst.__refcnt),
+		   rt->dst.__use, 0);
 	return 0;
 }