[NETLINK]: Correctly set NLM_F_MULTI without checking the pid
This patch rectifies some rtnetlink message builders that derive the
flags from the pid. It is now explicit like the other cases
which get it right. Also fixes half a dozen dumpers which did not
set NLM_F_MULTI at all.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 478a301..fd47a1e 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1030,14 +1030,13 @@
};
static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa,
- u32 pid, u32 seq, int event)
+ u32 pid, u32 seq, int event, unsigned int flags)
{
struct ifaddrmsg *ifm;
struct nlmsghdr *nlh;
unsigned char *b = skb->tail;
- nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
- if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
ifm = NLMSG_DATA(nlh);
ifm->ifa_family = AF_INET;
ifm->ifa_prefixlen = ifa->ifa_prefixlen;
@@ -1090,7 +1089,7 @@
continue;
if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
- RTM_NEWADDR) <= 0) {
+ RTM_NEWADDR, NLM_F_MULTI) <= 0) {
rcu_read_unlock();
goto done;
}
@@ -1113,7 +1112,7 @@
if (!skb)
netlink_set_err(rtnl, 0, RTMGRP_IPV4_IFADDR, ENOBUFS);
- else if (inet_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
+ else if (inet_fill_ifaddr(skb, ifa, 0, 0, event, 0) < 0) {
kfree_skb(skb);
netlink_set_err(rtnl, 0, RTMGRP_IPV4_IFADDR, EINVAL);
} else {
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index 6506dcc..b10d6bb 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -703,7 +703,8 @@
&f->fn_key,
fz->fz_order,
fa->fa_tos,
- fa->fa_info) < 0) {
+ fa->fa_info,
+ NLM_F_MULTI) < 0) {
cb->args[3] = i;
return -1;
}
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index ac4485f..b729d97 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -30,7 +30,8 @@
struct kern_rta *rta, struct fib_info *fi);
extern int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
u8 tb_id, u8 type, u8 scope, void *dst,
- int dst_len, u8 tos, struct fib_info *fi);
+ int dst_len, u8 tos, struct fib_info *fi,
+ unsigned int);
extern void rtmsg_fib(int event, u32 key, struct fib_alias *fa,
int z, int tb_id,
struct nlmsghdr *n, struct netlink_skb_parms *req);
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 39d0aad..0b298bb 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -367,13 +367,14 @@
static __inline__ int inet_fill_rule(struct sk_buff *skb,
struct fib_rule *r,
- struct netlink_callback *cb)
+ struct netlink_callback *cb,
+ unsigned int flags)
{
struct rtmsg *rtm;
struct nlmsghdr *nlh;
unsigned char *b = skb->tail;
- nlh = NLMSG_PUT(skb, NETLINK_CREDS(cb->skb)->pid, cb->nlh->nlmsg_seq, RTM_NEWRULE, sizeof(*rtm));
+ nlh = NLMSG_NEW_ANSWER(skb, cb, RTM_NEWRULE, sizeof(*rtm), flags);
rtm = NLMSG_DATA(nlh);
rtm->rtm_family = AF_INET;
rtm->rtm_dst_len = r->r_dst_len;
@@ -422,7 +423,7 @@
for (r=fib_rules, idx=0; r; r = r->r_next, idx++) {
if (idx < s_idx)
continue;
- if (inet_fill_rule(skb, r, cb) < 0)
+ if (inet_fill_rule(skb, r, cb, NLM_F_MULTI) < 0)
break;
}
read_unlock(&fib_rules_lock);
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 029362d..a9a44b4 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -286,7 +286,7 @@
if (fib_dump_info(skb, pid, n->nlmsg_seq, event, tb_id,
fa->fa_type, fa->fa_scope, &key, z,
fa->fa_tos,
- fa->fa_info) < 0) {
+ fa->fa_info, 0) < 0) {
kfree_skb(skb);
return;
}
@@ -932,13 +932,13 @@
int
fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
u8 tb_id, u8 type, u8 scope, void *dst, int dst_len, u8 tos,
- struct fib_info *fi)
+ struct fib_info *fi, unsigned int flags)
{
struct rtmsg *rtm;
struct nlmsghdr *nlh;
unsigned char *b = skb->tail;
- nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*rtm));
+ nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*rtm), flags);
rtm = NLMSG_DATA(nlh);
rtm->rtm_family = AF_INET;
rtm->rtm_dst_len = dst_len;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a682d28..f4d53c9 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2581,7 +2581,7 @@
}
static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
- int nowait)
+ int nowait, unsigned int flags)
{
struct rtable *rt = (struct rtable*)skb->dst;
struct rtmsg *r;
@@ -2591,9 +2591,8 @@
#ifdef CONFIG_IP_MROUTE
struct rtattr *eptr;
#endif
- nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*r));
+ nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
r = NLMSG_DATA(nlh);
- nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0;
r->rtm_family = AF_INET;
r->rtm_dst_len = 32;
r->rtm_src_len = 0;
@@ -2744,7 +2743,7 @@
NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
err = rt_fill_info(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
- RTM_NEWROUTE, 0);
+ RTM_NEWROUTE, 0, 0);
if (!err)
goto out_free;
if (err < 0) {
@@ -2781,8 +2780,8 @@
continue;
skb->dst = dst_clone(&rt->u.dst);
if (rt_fill_info(skb, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq,
- RTM_NEWROUTE, 1) <= 0) {
+ cb->nlh->nlmsg_seq, RTM_NEWROUTE,
+ 1, NLM_F_MULTI) <= 0) {
dst_release(xchg(&skb->dst, NULL));
rcu_read_unlock_bh();
goto done;