/*
- * 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
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/export.h>
-#include <net/inet_hashtables.h>
+#include <net/ipv6.h>
+#include <net/inet6_hashtables.h>
+#include <net/addrconf.h>
#include "rds.h"
#include "loop.h"
static struct hlist_head rds_conn_hash[RDS_CONNECTION_HASH_ENTRIES];
static struct kmem_cache *rds_conn_slab;
-static struct hlist_head *rds_conn_bucket(__be32 laddr, __be32 faddr)
+static struct hlist_head *rds_conn_bucket(const struct in6_addr *laddr,
+ const struct in6_addr *faddr)
{
+ static u32 rds6_hash_secret __read_mostly;
static u32 rds_hash_secret __read_mostly;
- unsigned long hash;
+ u32 lhash, fhash, hash;
net_get_random_once(&rds_hash_secret, sizeof(rds_hash_secret));
+ net_get_random_once(&rds6_hash_secret, sizeof(rds6_hash_secret));
+
+ lhash = (__force u32)laddr->s6_addr32[3];
+#if IS_ENABLED(CONFIG_IPV6)
+ fhash = __ipv6_addr_jhash(faddr, rds6_hash_secret);
+#else
+ fhash = (__force u32)faddr->s6_addr32[3];
+#endif
+ hash = __inet_ehashfn(lhash, 0, fhash, 0, rds_hash_secret);
- /* Pass NULL, don't need struct net for hash */
- hash = __inet_ehashfn(be32_to_cpu(laddr), 0,
- be32_to_cpu(faddr), 0,
- rds_hash_secret);
return &rds_conn_hash[hash & RDS_CONNECTION_HASH_MASK];
}
/* rcu read lock must be held or the connection spinlock */
static struct rds_connection *rds_conn_lookup(struct net *net,
struct hlist_head *head,
- __be32 laddr, __be32 faddr,
- struct rds_transport *trans)
+ const struct in6_addr *laddr,
+ const struct in6_addr *faddr,
+ struct rds_transport *trans,
+ int dev_if)
{
struct rds_connection *conn, *ret = NULL;
hlist_for_each_entry_rcu(conn, head, c_hash_node) {
- if (conn->c_faddr == faddr && conn->c_laddr == laddr &&
- conn->c_trans == trans && net == rds_conn_net(conn)) {
+ if (ipv6_addr_equal(&conn->c_faddr, faddr) &&
+ ipv6_addr_equal(&conn->c_laddr, laddr) &&
+ conn->c_trans == trans &&
+ net == rds_conn_net(conn) &&
+ conn->c_dev_if == dev_if) {
ret = conn;
break;
}
}
- rdsdebug("returning conn %p for %pI4 -> %pI4\n", ret,
- &laddr, &faddr);
+ rdsdebug("returning conn %p for %pI6c -> %pI6c\n", ret,
+ laddr, faddr);
return ret;
}
{
struct rds_connection *conn = cp->cp_conn;
- rdsdebug("connection %pI4 to %pI4 reset\n",
- &conn->c_laddr, &conn->c_faddr);
+ rdsdebug("connection %pI6c to %pI6c reset\n",
+ &conn->c_laddr, &conn->c_faddr);
rds_stats_inc(s_conn_reset);
rds_send_path_reset(cp);
* are torn down as the module is removed, if ever.
*/
static struct rds_connection *__rds_conn_create(struct net *net,
- __be32 laddr, __be32 faddr,
- struct rds_transport *trans, gfp_t gfp,
- int is_outgoing)
+ const struct in6_addr *laddr,
+ const struct in6_addr *faddr,
+ struct rds_transport *trans,
+ gfp_t gfp,
+ int is_outgoing,
+ int dev_if)
{
struct rds_connection *conn, *parent = NULL;
struct hlist_head *head = rds_conn_bucket(laddr, faddr);
int npaths = (trans->t_mp_capable ? RDS_MPATH_WORKERS : 1);
rcu_read_lock();
- conn = rds_conn_lookup(net, head, laddr, faddr, trans);
- if (conn && conn->c_loopback && conn->c_trans != &rds_loop_transport &&
- laddr == faddr && !is_outgoing) {
+ conn = rds_conn_lookup(net, head, laddr, faddr, trans, dev_if);
+ if (conn &&
+ conn->c_loopback &&
+ conn->c_trans != &rds_loop_transport &&
+ ipv6_addr_equal(laddr, faddr) &&
+ !is_outgoing) {
/* This is a looped back IB connection, and we're
* called by the code handling the incoming connect.
* We need a second connection object into which we
}
INIT_HLIST_NODE(&conn->c_hash_node);
- conn->c_laddr = laddr;
- conn->c_faddr = faddr;
+ conn->c_laddr = *laddr;
+ conn->c_isv6 = !ipv6_addr_v4mapped(laddr);
+ conn->c_faddr = *faddr;
+ conn->c_dev_if = dev_if;
+
+#if IS_ENABLED(CONFIG_IPV6)
+ /* If the local address is link local, set c_bound_if to be the
+ * index used for this connection. Otherwise, set it to 0 as
+ * the socket is not bound to an interface. c_bound_if is used
+ * to look up a socket when a packet is received
+ */
+ if (ipv6_addr_type(laddr) & IPV6_ADDR_LINKLOCAL)
+ conn->c_bound_if = dev_if;
+ else
+#endif
+ conn->c_bound_if = 0;
rds_conn_net_set(conn, net);
* can bind to the destination address then we'd rather the messages
* flow through loopback rather than either transport.
*/
- loop_trans = rds_trans_get_preferred(net, faddr);
+ loop_trans = rds_trans_get_preferred(net, faddr, conn->c_dev_if);
if (loop_trans) {
rds_trans_put(loop_trans);
conn->c_loopback = 1;
goto out;
}
- rdsdebug("allocated conn %p for %pI4 -> %pI4 over %s %s\n",
- conn, &laddr, &faddr,
- strnlen(trans->t_name, sizeof(trans->t_name)) ? trans->t_name :
- "[unknown]", is_outgoing ? "(outgoing)" : "");
+ rdsdebug("allocated conn %p for %pI6c -> %pI6c over %s %s\n",
+ conn, laddr, faddr,
+ strnlen(trans->t_name, sizeof(trans->t_name)) ?
+ trans->t_name : "[unknown]", is_outgoing ? "(outgoing)" : "");
/*
* Since we ran without holding the conn lock, someone could
/* Creating normal conn */
struct rds_connection *found;
- found = rds_conn_lookup(net, head, laddr, faddr, trans);
+ found = rds_conn_lookup(net, head, laddr, faddr, trans,
+ dev_if);
if (found) {
struct rds_conn_path *cp;
int i;
}
struct rds_connection *rds_conn_create(struct net *net,
- __be32 laddr, __be32 faddr,
- struct rds_transport *trans, gfp_t gfp)
+ const struct in6_addr *laddr,
+ const struct in6_addr *faddr,
+ struct rds_transport *trans, gfp_t gfp,
+ int dev_if)
{
- return __rds_conn_create(net, laddr, faddr, trans, gfp, 0);
+ return __rds_conn_create(net, laddr, faddr, trans, gfp, 0, dev_if);
}
EXPORT_SYMBOL_GPL(rds_conn_create);
struct rds_connection *rds_conn_create_outgoing(struct net *net,
- __be32 laddr, __be32 faddr,
- struct rds_transport *trans, gfp_t gfp)
+ const struct in6_addr *laddr,
+ const struct in6_addr *faddr,
+ struct rds_transport *trans,
+ gfp_t gfp, int dev_if)
{
- return __rds_conn_create(net, laddr, faddr, trans, gfp, 1);
+ return __rds_conn_create(net, laddr, faddr, trans, gfp, 1, dev_if);
}
EXPORT_SYMBOL_GPL(rds_conn_create_outgoing);
}
EXPORT_SYMBOL_GPL(rds_conn_destroy);
-static void rds_conn_message_info(struct socket *sock, unsigned int len,
- struct rds_info_iterator *iter,
- struct rds_info_lengths *lens,
- int want_send)
+static void __rds_inc_msg_cp(struct rds_incoming *inc,
+ struct rds_info_iterator *iter,
+ void *saddr, void *daddr, int flip, bool isv6)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (isv6)
+ rds6_inc_info_copy(inc, iter, saddr, daddr, flip);
+ else
+#endif
+ rds_inc_info_copy(inc, iter, *(__be32 *)saddr,
+ *(__be32 *)daddr, flip);
+}
+
+static void rds_conn_message_info_cmn(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens,
+ int want_send, bool isv6)
{
struct hlist_head *head;
struct list_head *list;
size_t i;
int j;
- len /= sizeof(struct rds_info_message);
+ if (isv6)
+ len /= sizeof(struct rds6_info_message);
+ else
+ len /= sizeof(struct rds_info_message);
rcu_read_lock();
struct rds_conn_path *cp;
int npaths;
+ if (!isv6 && conn->c_isv6)
+ continue;
+
npaths = (conn->c_trans->t_mp_capable ?
RDS_MPATH_WORKERS : 1);
list_for_each_entry(rm, list, m_conn_item) {
total++;
if (total <= len)
- rds_inc_info_copy(&rm->m_inc,
- iter,
- conn->c_laddr,
- conn->c_faddr,
- 0);
+ __rds_inc_msg_cp(&rm->m_inc,
+ iter,
+ &conn->c_laddr,
+ &conn->c_faddr,
+ 0, isv6);
}
spin_unlock_irqrestore(&cp->cp_lock, flags);
rcu_read_unlock();
lens->nr = total;
- lens->each = sizeof(struct rds_info_message);
+ if (isv6)
+ lens->each = sizeof(struct rds6_info_message);
+ else
+ lens->each = sizeof(struct rds_info_message);
}
+static void rds_conn_message_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens,
+ int want_send)
+{
+ rds_conn_message_info_cmn(sock, len, iter, lens, want_send, false);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void rds6_conn_message_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens,
+ int want_send)
+{
+ rds_conn_message_info_cmn(sock, len, iter, lens, want_send, true);
+}
+#endif
+
static void rds_conn_message_info_send(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens)
rds_conn_message_info(sock, len, iter, lens, 1);
}
+#if IS_ENABLED(CONFIG_IPV6)
+static void rds6_conn_message_info_send(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ rds6_conn_message_info(sock, len, iter, lens, 1);
+}
+#endif
+
static void rds_conn_message_info_retrans(struct socket *sock,
unsigned int len,
struct rds_info_iterator *iter,
rds_conn_message_info(sock, len, iter, lens, 0);
}
+#if IS_ENABLED(CONFIG_IPV6)
+static void rds6_conn_message_info_retrans(struct socket *sock,
+ unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ rds6_conn_message_info(sock, len, iter, lens, 0);
+}
+#endif
+
void rds_for_each_conn_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens,
struct hlist_head *head;
struct rds_connection *conn;
size_t i;
- int j;
rcu_read_lock();
i++, head++) {
hlist_for_each_entry_rcu(conn, head, c_hash_node) {
struct rds_conn_path *cp;
- int npaths;
- npaths = (conn->c_trans->t_mp_capable ?
- RDS_MPATH_WORKERS : 1);
- for (j = 0; j < npaths; j++) {
- cp = &conn->c_path[j];
+ /* XXX We only copy the information from the first
+ * path for now. The problem is that if there are
+ * more than one underlying paths, we cannot report
+ * information of all of them using the existing
+ * API. For example, there is only one next_tx_seq,
+ * which path's next_tx_seq should we report? It is
+ * a bug in the design of MPRDS.
+ */
+ cp = conn->c_path;
- /* XXX no cp_lock usage.. */
- if (!visitor(cp, buffer))
- continue;
- }
+ /* XXX no cp_lock usage.. */
+ if (!visitor(cp, buffer))
+ continue;
/* We copy as much as we can fit in the buffer,
* but we count all items so that the caller
static int rds_conn_info_visitor(struct rds_conn_path *cp, void *buffer)
{
struct rds_info_connection *cinfo = buffer;
+ struct rds_connection *conn = cp->cp_conn;
+
+ if (conn->c_isv6)
+ return 0;
cinfo->next_tx_seq = cp->cp_next_tx_seq;
cinfo->next_rx_seq = cp->cp_next_rx_seq;
- cinfo->laddr = cp->cp_conn->c_laddr;
- cinfo->faddr = cp->cp_conn->c_faddr;
- strncpy(cinfo->transport, cp->cp_conn->c_trans->t_name,
+ cinfo->laddr = conn->c_laddr.s6_addr32[3];
+ cinfo->faddr = conn->c_faddr.s6_addr32[3];
+ strncpy(cinfo->transport, conn->c_trans->t_name,
sizeof(cinfo->transport));
cinfo->flags = 0;
return 1;
}
+#if IS_ENABLED(CONFIG_IPV6)
+static int rds6_conn_info_visitor(struct rds_conn_path *cp, void *buffer)
+{
+ struct rds6_info_connection *cinfo6 = buffer;
+ struct rds_connection *conn = cp->cp_conn;
+
+ cinfo6->next_tx_seq = cp->cp_next_tx_seq;
+ cinfo6->next_rx_seq = cp->cp_next_rx_seq;
+ cinfo6->laddr = conn->c_laddr;
+ cinfo6->faddr = conn->c_faddr;
+ strncpy(cinfo6->transport, conn->c_trans->t_name,
+ sizeof(cinfo6->transport));
+ cinfo6->flags = 0;
+
+ rds_conn_info_set(cinfo6->flags, test_bit(RDS_IN_XMIT, &cp->cp_flags),
+ SENDING);
+ /* XXX Future: return the state rather than these funky bits */
+ rds_conn_info_set(cinfo6->flags,
+ atomic_read(&cp->cp_state) == RDS_CONN_CONNECTING,
+ CONNECTING);
+ rds_conn_info_set(cinfo6->flags,
+ atomic_read(&cp->cp_state) == RDS_CONN_UP,
+ CONNECTED);
+ /* Just return 1 as there is no error case. This is a helper function
+ * for rds_walk_conn_path_info() and it wants a return value.
+ */
+ return 1;
+}
+#endif
+
static void rds_conn_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens)
sizeof(struct rds_info_connection));
}
+#if IS_ENABLED(CONFIG_IPV6)
+static void rds6_conn_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ u64 buffer[(sizeof(struct rds6_info_connection) + 7) / 8];
+
+ rds_walk_conn_path_info(sock, len, iter, lens,
+ rds6_conn_info_visitor,
+ buffer,
+ sizeof(struct rds6_info_connection));
+}
+#endif
+
int rds_conn_init(void)
{
int ret;
rds_conn_message_info_send);
rds_info_register_func(RDS_INFO_RETRANS_MESSAGES,
rds_conn_message_info_retrans);
-
+#if IS_ENABLED(CONFIG_IPV6)
+ rds_info_register_func(RDS6_INFO_CONNECTIONS, rds6_conn_info);
+ rds_info_register_func(RDS6_INFO_SEND_MESSAGES,
+ rds6_conn_message_info_send);
+ rds_info_register_func(RDS6_INFO_RETRANS_MESSAGES,
+ rds6_conn_message_info_retrans);
+#endif
return 0;
}
rds_conn_message_info_send);
rds_info_deregister_func(RDS_INFO_RETRANS_MESSAGES,
rds_conn_message_info_retrans);
+#if IS_ENABLED(CONFIG_IPV6)
+ rds_info_deregister_func(RDS6_INFO_CONNECTIONS, rds6_conn_info);
+ rds_info_deregister_func(RDS6_INFO_SEND_MESSAGES,
+ rds6_conn_message_info_send);
+ rds_info_deregister_func(RDS6_INFO_RETRANS_MESSAGES,
+ rds6_conn_message_info_retrans);
+#endif
}
/*
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