rtnetlink: Remove passing of attributes into rtnl_doit functions
With decnet converted, we can finally get rid of rta_buf and its
computations around it. It also gets rid of the minimal header
length verification since all message handlers do that explicitly
anyway.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 9a9b99e..751f124 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -515,32 +515,6 @@
return err;
}
-static const int rtm_min[RTM_NR_FAMILIES] =
-{
- [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
- [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
- [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
- [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
- [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
- [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
- [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
- [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
- [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
- [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
-};
-
-static const int rta_max[RTM_NR_FAMILIES] =
-{
- [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
- [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
- [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
- [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
- [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
- [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
- [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
- [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
-};
-
int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
{
struct sock *rtnl = net->rtnl;
@@ -1537,7 +1511,7 @@
return err;
}
-static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -1578,7 +1552,7 @@
return err;
}
-static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
const struct rtnl_link_ops *ops;
@@ -1709,7 +1683,7 @@
return 0;
}
-static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
const struct rtnl_link_ops *ops;
@@ -1864,7 +1838,7 @@
}
}
-static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -2081,7 +2055,7 @@
}
EXPORT_SYMBOL(ndo_dflt_fdb_add);
-static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct ndmsg *ndm;
@@ -2179,7 +2153,7 @@
}
EXPORT_SYMBOL(ndo_dflt_fdb_del);
-static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct ndmsg *ndm;
@@ -2478,8 +2452,7 @@
return err;
}
-static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
- void *arg)
+static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -2549,8 +2522,7 @@
return err;
}
-static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
- void *arg)
+static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -2620,10 +2592,6 @@
return err;
}
-/* Protected by RTNL sempahore. */
-static struct rtattr **rta_buf;
-static int rtattr_max;
-
/* Process one rtnetlink message. */
static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
@@ -2631,7 +2599,6 @@
struct net *net = sock_net(skb->sk);
rtnl_doit_func doit;
int sz_idx, kind;
- int min_len;
int family;
int type;
int err;
@@ -2679,32 +2646,11 @@
return err;
}
- memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
-
- min_len = rtm_min[sz_idx];
- if (nlh->nlmsg_len < min_len)
- return -EINVAL;
-
- if (nlh->nlmsg_len > min_len) {
- int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
- struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
-
- while (RTA_OK(attr, attrlen)) {
- unsigned int flavor = attr->rta_type & NLA_TYPE_MASK;
- if (flavor) {
- if (flavor > rta_max[sz_idx])
- return -EINVAL;
- rta_buf[flavor-1] = attr;
- }
- attr = RTA_NEXT(attr, attrlen);
- }
- }
-
doit = rtnl_get_doit(family, type);
if (doit == NULL)
return -EOPNOTSUPP;
- return doit(skb, nlh, (void *)&rta_buf[0]);
+ return doit(skb, nlh);
}
static void rtnetlink_rcv(struct sk_buff *skb)
@@ -2774,16 +2720,6 @@
void __init rtnetlink_init(void)
{
- int i;
-
- rtattr_max = 0;
- for (i = 0; i < ARRAY_SIZE(rta_max); i++)
- if (rta_max[i] > rtattr_max)
- rtattr_max = rta_max[i];
- rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
- if (!rta_buf)
- panic("rtnetlink_init: cannot allocate rta_buf\n");
-
if (register_pernet_subsys(&rtnetlink_net_ops))
panic("rtnetlink_init: cannot initialize rtnetlink\n");