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tipc: add 128-bit node identifier

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We add a 128-bit node identity, as an alternative to the currently used
32-bit node address.

For the sake of compatibility and to minimize message header changes
we retain the existing 32-bit address field. When not set explicitly by
the user, this field will be filled with a hash value generated from the
much longer node identity, and be used as a shorthand value for the
latter.

We permit either the address or the identity to be set by configuration,
but not both, so when the address value is set by a legacy user the
corresponding 128-bit node identity is generated based on the that value.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2018-03-22 20:42:50 +01:00 committed by David S. Miller
parent 23fd3eace0
commit d50ccc2d39
12 changed files with 148 additions and 56 deletions
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2
include/uapi/linux/tipc_netlink.h
View file

@ -169,6 +169,8 @@ enum {
TIPC_NLA_NET_UNSPEC,
TIPC_NLA_NET_ID, /* u32 */
TIPC_NLA_NET_ADDR, /* u32 */
TIPC_NLA_NET_NODEID, /* u64 */
TIPC_NLA_NET_NODEID_W1, /* u64 */
__TIPC_NLA_NET_MAX,
TIPC_NLA_NET_MAX = __TIPC_NLA_NET_MAX - 1

81
net/tipc/addr.c
View file

@ -1,7 +1,7 @@
/*
* net/tipc/addr.c: TIPC address utility routines
*
* Copyright (c) 2000-2006, Ericsson AB
* Copyright (c) 2000-2006, 2018, Ericsson AB
* Copyright (c) 2004-2005, 2010-2011, Wind River Systems
* All rights reserved.
*
@ -34,18 +34,9 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include "addr.h"
#include "core.h"
/**
* in_own_node - test for node inclusion; <0.0.0> always matches
*/
int in_own_node(struct net *net, u32 addr)
{
return addr == tipc_own_addr(net) || !addr;
}
bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr)
{
if (!domain || (domain == addr))
@ -61,9 +52,71 @@ bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr)
return false;
}
char *tipc_addr_string_fill(char *string, u32 addr)
void tipc_set_node_id(struct net *net, u8 *id)
{
snprintf(string, 16, "<%u.%u.%u>",
tipc_zone(addr), tipc_cluster(addr), tipc_node(addr));
return string;
struct tipc_net *tn = tipc_net(net);
u32 *tmp = (u32 *)id;
memcpy(tn->node_id, id, NODE_ID_LEN);
tipc_nodeid2string(tn->node_id_string, id);
tn->node_addr = tmp[0] ^ tmp[1] ^ tmp[2] ^ tmp[3];
pr_info("Own node identity %s, cluster identity %u\n",
tipc_own_id_string(net), tn->net_id);
}
void tipc_set_node_addr(struct net *net, u32 addr)
{
struct tipc_net *tn = tipc_net(net);
u8 node_id[NODE_ID_LEN] = {0,};
tn->node_addr = addr;
if (!tipc_own_id(net)) {
sprintf(node_id, "%x", addr);
tipc_set_node_id(net, node_id);
}
pr_info("32-bit node address hash set to %x\n", addr);
}
char *tipc_nodeid2string(char *str, u8 *id)
{
int i;
u8 c;
/* Already a string ? */
for (i = 0; i < NODE_ID_LEN; i++) {
c = id[i];
if (c >= '0' && c <= '9')
continue;
if (c >= 'A' && c <= 'Z')
continue;
if (c >= 'a' && c <= 'z')
continue;
if (c == '.')
continue;
if (c == ':')
continue;
if (c == '_')
continue;
if (c == '-')
continue;
if (c == '@')
continue;
if (c != 0)
break;
}
if (i == NODE_ID_LEN) {
memcpy(str, id, NODE_ID_LEN);
str[NODE_ID_LEN] = 0;
return str;
}
/* Translate to hex string */
for (i = 0; i < NODE_ID_LEN; i++)
sprintf(&str[2 * i], "%02x", id[i]);
/* Strip off trailing zeroes */
for (i = NODE_ID_STR_LEN - 2; str[i] == '0'; i--)
str[i] = 0;
return str;
}

28
net/tipc/addr.h
View file

@ -1,7 +1,7 @@
/*
* net/tipc/addr.h: Include file for TIPC address utility routines
*
* Copyright (c) 2000-2006, Ericsson AB
* Copyright (c) 2000-2006, 2018, Ericsson AB
* Copyright (c) 2004-2005, Wind River Systems
* All rights reserved.
*
@ -44,10 +44,22 @@
#include "core.h"
static inline u32 tipc_own_addr(struct net *net)
{
return tipc_net(net)->node_addr;
}
static inline u8 *tipc_own_id(struct net *net)
{
struct tipc_net *tn = tipc_net(net);
return tn->own_addr;
if (!strlen(tn->node_id_string))
return NULL;
return tn->node_id;
}
static inline char *tipc_own_id_string(struct net *net)
{
return tipc_net(net)->node_id_string;
}
static inline u32 tipc_cluster_mask(u32 addr)
@ -65,9 +77,15 @@ static inline int tipc_scope2node(struct net *net, int sc)
return sc != TIPC_NODE_SCOPE ? 0 : tipc_own_addr(net);
}
u32 tipc_own_addr(struct net *net);
int in_own_node(struct net *net, u32 addr);
static inline int in_own_node(struct net *net, u32 addr)
{
return addr == tipc_own_addr(net) || !addr;
}
bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr);
char *tipc_addr_string_fill(char *string, u32 addr);
void tipc_set_node_id(struct net *net, u8 *id);
void tipc_set_node_addr(struct net *net, u32 addr);
char *tipc_nodeid2string(char *str, u8 *id);
u32 tipc_node_id2hash(u8 *id128);
#endif

4
net/tipc/core.c
View file

@ -56,7 +56,9 @@ static int __net_init tipc_init_net(struct net *net)
int err;
tn->net_id = 4711;
tn->own_addr = 0;
tn->node_addr = 0;
memset(tn->node_id, 0, sizeof(tn->node_id));
memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
get_random_bytes(&tn->random, sizeof(int));
INIT_LIST_HEAD(&tn->node_list);

6
net/tipc/core.h
View file

@ -72,13 +72,17 @@ struct tipc_monitor;
#define NODE_HTABLE_SIZE 512
#define MAX_BEARERS 3
#define TIPC_DEF_MON_THRESHOLD 32
#define NODE_ID_LEN 16
#define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1)
extern unsigned int tipc_net_id __read_mostly;
extern int sysctl_tipc_rmem[3] __read_mostly;
extern int sysctl_tipc_named_timeout __read_mostly;
struct tipc_net {
u32 own_addr;
u8 node_id[NODE_ID_LEN];
u32 node_addr;
char node_id_string[NODE_ID_STR_LEN];
int net_id;
int random;
bool legacy_addr_format;

4
net/tipc/discover.c
View file

@ -118,13 +118,11 @@ static void tipc_disc_msg_xmit(struct net *net, u32 mtyp, u32 dst, u32 src,
static void disc_dupl_alert(struct tipc_bearer *b, u32 node_addr,
struct tipc_media_addr *media_addr)
{
char node_addr_str[16];
char media_addr_str[64];
tipc_addr_string_fill(node_addr_str, node_addr);
tipc_media_addr_printf(media_addr_str, sizeof(media_addr_str),
media_addr);
pr_warn("Duplicate %s using %s seen on <%s>\n", node_addr_str,
pr_warn("Duplicate %x using %s seen on <%s>\n", node_addr,
media_addr_str, b->name);
}

6
net/tipc/link.c
View file

@ -442,6 +442,7 @@ bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
struct sk_buff_head *namedq,
struct tipc_link **link)
{
char *self_str = tipc_own_id_string(net);
struct tipc_link *l;
l = kzalloc(sizeof(*l), GFP_ATOMIC);
@ -451,7 +452,10 @@ bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
l->session = session;
/* Note: peer i/f name is completed by reset/activate message */
sprintf(l->name, "%x:%s-%x:unknown", self, if_name, peer);
if (strlen(self_str) > 16)
sprintf(l->name, "%x:%s-%x:unknown", self, if_name, peer);
else
sprintf(l->name, "%s:%s-%x:unknown", self_str, if_name, peer);
strcpy(l->if_name, if_name);
l->addr = peer;
l->peer_caps = peer_caps;

6
net/tipc/name_distr.c
View file

@ -318,7 +318,6 @@ void tipc_named_process_backlog(struct net *net)
{
struct distr_queue_item *e, *tmp;
struct tipc_net *tn = net_generic(net, tipc_net_id);
char addr[16];
unsigned long now = get_jiffies_64();
list_for_each_entry_safe(e, tmp, &tn->dist_queue, next) {
@ -326,12 +325,11 @@ void tipc_named_process_backlog(struct net *net)
if (!tipc_update_nametbl(net, &e->i, e->node, e->dtype))
continue;
} else {
tipc_addr_string_fill(addr, e->node);
pr_warn_ratelimited("Dropping name table update (%d) of {%u, %u, %u} from %s key=%u\n",
pr_warn_ratelimited("Dropping name table update (%d) of {%u, %u, %u} from %x key=%u\n",
e->dtype, ntohl(e->i.type),
ntohl(e->i.lower),
ntohl(e->i.upper),
addr, ntohl(e->i.key));
e->node, ntohl(e->i.key));
}
list_del(&e->next);
kfree(e);

51
net/tipc/net.c
View file

@ -104,27 +104,31 @@
* - A local spin_lock protecting the queue of subscriber events.
*/
int tipc_net_start(struct net *net, u32 addr)
int tipc_net_init(struct net *net, u8 *node_id, u32 addr)
{
struct tipc_net *tn = tipc_net(net);
char addr_string[16];
if (tipc_own_id(net)) {
pr_info("Cannot configure node identity twice\n");
return -1;
}
pr_info("Started in network mode\n");
tn->own_addr = addr;
if (node_id) {
tipc_set_node_id(net, node_id);
tipc_net_finalize(net, tipc_own_addr(net));
}
if (addr)
tipc_net_finalize(net, addr);
return 0;
}
/* Ensure that the new address is visible before we reinit. */
void tipc_net_finalize(struct net *net, u32 addr)
{
tipc_set_node_addr(net, addr);
smp_mb();
tipc_named_reinit(net);
tipc_sk_reinit(net);
tipc_nametbl_publish(net, TIPC_CFG_SRV, addr, addr,
TIPC_CLUSTER_SCOPE, 0, addr);
pr_info("Started in network mode\n");
pr_info("Own node address %s, cluster identity %u\n",
tipc_addr_string_fill(addr_string, addr),
tn->net_id);
return 0;
}
void tipc_net_stop(struct net *net)
@ -146,8 +150,10 @@ void tipc_net_stop(struct net *net)
static int __tipc_nl_add_net(struct net *net, struct tipc_nl_msg *msg)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
void *hdr;
u64 *w0 = (u64 *)&tn->node_id[0];
u64 *w1 = (u64 *)&tn->node_id[8];
struct nlattr *attrs;
void *hdr;
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_NET_GET);
@ -160,7 +166,10 @@ static int __tipc_nl_add_net(struct net *net, struct tipc_nl_msg *msg)
if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tn->net_id))
goto attr_msg_full;
if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID, *w0, 0))
goto attr_msg_full;
if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID_W1, *w1, 0))
goto attr_msg_full;
nla_nest_end(msg->skb, attrs);
genlmsg_end(msg->skb, hdr);
@ -212,6 +221,7 @@ int __tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
err = nla_parse_nested(attrs, TIPC_NLA_NET_MAX,
info->attrs[TIPC_NLA_NET], tipc_nl_net_policy,
info->extack);
if (err)
return err;
@ -236,9 +246,18 @@ int __tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
if (!addr)
return -EINVAL;
tn->legacy_addr_format = true;
tipc_net_start(net, addr);
tipc_net_init(net, NULL, addr);
}
if (attrs[TIPC_NLA_NET_NODEID]) {
u8 node_id[NODE_ID_LEN];
u64 *w0 = (u64 *)&node_id[0];
u64 *w1 = (u64 *)&node_id[8];
*w0 = nla_get_u64(attrs[TIPC_NLA_NET_NODEID]);
*w1 = nla_get_u64(attrs[TIPC_NLA_NET_NODEID_W1]);
tipc_net_init(net, node_id, 0);
}
return 0;
}

4
net/tipc/net.h
View file

@ -41,10 +41,8 @@
extern const struct nla_policy tipc_nl_net_policy[];
int tipc_net_start(struct net *net, u32 addr);
void tipc_net_finalize(struct net *net, u32 addr);
void tipc_net_stop(struct net *net);
int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info);
int __tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info);

8
net/tipc/node.c
View file

@ -883,11 +883,9 @@ void tipc_node_delete_links(struct net *net, int bearer_id)
static void tipc_node_reset_links(struct tipc_node *n)
{
char addr_string[16];
int i;
pr_warn("Resetting all links to %s\n",
tipc_addr_string_fill(addr_string, n->addr));
pr_warn("Resetting all links to %x\n", n->addr);
for (i = 0; i < MAX_BEARERS; i++) {
tipc_node_link_down(n, i, false);
@ -1074,15 +1072,13 @@ illegal_evt:
static void node_lost_contact(struct tipc_node *n,
struct sk_buff_head *inputq)
{
char addr_string[16];
struct tipc_sock_conn *conn, *safe;
struct tipc_link *l;
struct list_head *conns = &n->conn_sks;
struct sk_buff *skb;
uint i;
pr_debug("Lost contact with %s\n",
tipc_addr_string_fill(addr_string, n->addr));
pr_debug("Lost contact with %x\n", n->addr);
/* Clean up broadcast state */
tipc_bcast_remove_peer(n->net, n->bc_entry.link);

4
net/tipc/node.h
View file

@ -49,14 +49,14 @@ enum {
TIPC_BCAST_STATE_NACK = (1 << 2),
TIPC_BLOCK_FLOWCTL = (1 << 3),
TIPC_BCAST_RCAST = (1 << 4),
TIPC_NODE_ID32 = (1 << 5)
TIPC_NODE_ID128 = (1 << 5)
};
#define TIPC_NODE_CAPABILITIES (TIPC_BCAST_SYNCH | \
TIPC_BCAST_STATE_NACK | \
TIPC_BCAST_RCAST | \
TIPC_BLOCK_FLOWCTL | \
TIPC_NODE_ID32)
TIPC_NODE_ID128)
#define INVALID_BEARER_ID -1
void tipc_node_stop(struct net *net);