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-rw-r--r--net/rds/bind.c91
1 files changed, 63 insertions, 28 deletions
diff --git a/net/rds/bind.c b/net/rds/bind.c
index 5aa3a64aa4f0..c401776ad938 100644
--- a/net/rds/bind.c
+++ b/net/rds/bind.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2006 Oracle. All rights reserved.
+ * Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -33,6 +33,7 @@
#include <linux/kernel.h>
#include <net/sock.h>
#include <linux/in.h>
+#include <linux/ipv6.h>
#include <linux/if_arp.h>
#include <linux/jhash.h>
#include <linux/ratelimit.h>
@@ -42,42 +43,58 @@ static struct rhashtable bind_hash_table;
static const struct rhashtable_params ht_parms = {
.nelem_hint = 768,
- .key_len = sizeof(u64),
+ .key_len = RDS_BOUND_KEY_LEN,
.key_offset = offsetof(struct rds_sock, rs_bound_key),
.head_offset = offsetof(struct rds_sock, rs_bound_node),
.max_size = 16384,
.min_size = 1024,
};
+/* Create a key for the bind hash table manipulation. Port is in network byte
+ * order.
+ */
+static inline void __rds_create_bind_key(u8 *key, const struct in6_addr *addr,
+ __be16 port, __u32 scope_id)
+{
+ memcpy(key, addr, sizeof(*addr));
+ key += sizeof(*addr);
+ memcpy(key, &port, sizeof(port));
+ key += sizeof(port);
+ memcpy(key, &scope_id, sizeof(scope_id));
+}
+
/*
* Return the rds_sock bound at the given local address.
*
* The rx path can race with rds_release. We notice if rds_release() has
* marked this socket and don't return a rs ref to the rx path.
*/
-struct rds_sock *rds_find_bound(__be32 addr, __be16 port)
+struct rds_sock *rds_find_bound(const struct in6_addr *addr, __be16 port,
+ __u32 scope_id)
{
- u64 key = ((u64)addr << 32) | port;
+ u8 key[RDS_BOUND_KEY_LEN];
struct rds_sock *rs;
- rs = rhashtable_lookup_fast(&bind_hash_table, &key, ht_parms);
+ __rds_create_bind_key(key, addr, port, scope_id);
+ rs = rhashtable_lookup_fast(&bind_hash_table, key, ht_parms);
if (rs && !sock_flag(rds_rs_to_sk(rs), SOCK_DEAD))
rds_sock_addref(rs);
else
rs = NULL;
- rdsdebug("returning rs %p for %pI4:%u\n", rs, &addr,
- ntohs(port));
+ rdsdebug("returning rs %p for %pI6c:%u\n", rs, addr,
+ ntohs(port));
return rs;
}
/* returns -ve errno or +ve port */
-static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
+static int rds_add_bound(struct rds_sock *rs, const struct in6_addr *addr,
+ __be16 *port, __u32 scope_id)
{
int ret = -EADDRINUSE;
u16 rover, last;
- u64 key;
+ u8 key[RDS_BOUND_KEY_LEN];
if (*port != 0) {
rover = be16_to_cpu(*port);
@@ -95,12 +112,13 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
if (rover == RDS_FLAG_PROBE_PORT)
continue;
- key = ((u64)addr << 32) | cpu_to_be16(rover);
- if (rhashtable_lookup_fast(&bind_hash_table, &key, ht_parms))
+ __rds_create_bind_key(key, addr, cpu_to_be16(rover),
+ scope_id);
+ if (rhashtable_lookup_fast(&bind_hash_table, key, ht_parms))
continue;
- rs->rs_bound_key = key;
- rs->rs_bound_addr = addr;
+ memcpy(rs->rs_bound_key, key, sizeof(rs->rs_bound_key));
+ rs->rs_bound_addr = *addr;
net_get_random_once(&rs->rs_hash_initval,
sizeof(rs->rs_hash_initval));
rs->rs_bound_port = cpu_to_be16(rover);
@@ -114,7 +132,7 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
rs, &addr, (int)ntohs(*port));
break;
} else {
- rs->rs_bound_addr = 0;
+ rs->rs_bound_addr = in6addr_any;
rds_sock_put(rs);
ret = -ENOMEM;
break;
@@ -127,44 +145,61 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
void rds_remove_bound(struct rds_sock *rs)
{
- if (!rs->rs_bound_addr)
+ if (ipv6_addr_any(&rs->rs_bound_addr))
return;
- rdsdebug("rs %p unbinding from %pI4:%d\n",
+ rdsdebug("rs %p unbinding from %pI6c:%d\n",
rs, &rs->rs_bound_addr,
ntohs(rs->rs_bound_port));
rhashtable_remove_fast(&bind_hash_table, &rs->rs_bound_node, ht_parms);
rds_sock_put(rs);
- rs->rs_bound_addr = 0;
+ rs->rs_bound_addr = in6addr_any;
}
int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
struct sock *sk = sock->sk;
- struct sockaddr_in *sin = (struct sockaddr_in *)uaddr;
struct rds_sock *rs = rds_sk_to_rs(sk);
+ struct in6_addr v6addr, *binding_addr;
struct rds_transport *trans;
+ __u32 scope_id = 0;
int ret = 0;
+ __be16 port;
+ /* We only allow an RDS socket to be bound to an IPv4 address. IPv6
+ * address support will be added later.
+ */
+ if (addr_len == sizeof(struct sockaddr_in)) {
+ struct sockaddr_in *sin = (struct sockaddr_in *)uaddr;
+
+ if (sin->sin_family != AF_INET ||
+ sin->sin_addr.s_addr == htonl(INADDR_ANY))
+ return -EINVAL;
+ ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &v6addr);
+ binding_addr = &v6addr;
+ port = sin->sin_port;
+ } else if (addr_len == sizeof(struct sockaddr_in6)) {
+ return -EPROTONOSUPPORT;
+ } else {
+ return -EINVAL;
+ }
lock_sock(sk);
- if (addr_len != sizeof(struct sockaddr_in) ||
- sin->sin_family != AF_INET ||
- rs->rs_bound_addr ||
- sin->sin_addr.s_addr == htonl(INADDR_ANY)) {
+ /* RDS socket does not allow re-binding. */
+ if (!ipv6_addr_any(&rs->rs_bound_addr)) {
ret = -EINVAL;
goto out;
}
- ret = rds_add_bound(rs, sin->sin_addr.s_addr, &sin->sin_port);
+ ret = rds_add_bound(rs, binding_addr, &port, scope_id);
if (ret)
goto out;
if (rs->rs_transport) { /* previously bound */
trans = rs->rs_transport;
if (trans->laddr_check(sock_net(sock->sk),
- sin->sin_addr.s_addr) != 0) {
+ binding_addr, scope_id) != 0) {
ret = -ENOPROTOOPT;
rds_remove_bound(rs);
} else {
@@ -172,13 +207,13 @@ int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
}
goto out;
}
- trans = rds_trans_get_preferred(sock_net(sock->sk),
- sin->sin_addr.s_addr);
+ trans = rds_trans_get_preferred(sock_net(sock->sk), binding_addr,
+ scope_id);
if (!trans) {
ret = -EADDRNOTAVAIL;
rds_remove_bound(rs);
- pr_info_ratelimited("RDS: %s could not find a transport for %pI4, load rds_tcp or rds_rdma?\n",
- __func__, &sin->sin_addr.s_addr);
+ pr_info_ratelimited("RDS: %s could not find a transport for %pI6c, load rds_tcp or rds_rdma?\n",
+ __func__, binding_addr);
goto out;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.