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tipc: make tipc broadcast link support net namespace

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TIPC broadcast link is statically established and its relevant states
are maintained with the global variables: "bcbearer", "bclink" and
"bcl". Allowing different namespace to own different broadcast link
instances, these variables must be moved to tipc_net structure and
broadcast link instances would be allocated and initialized when
namespace is created.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Tested-by: Tero Aho <Tero.Aho@coriant.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2015-01-09 15:27:07 +08:00 committed by David S. Miller
parent 7f9f95d9d9
commit 1da465683a
12 changed files with 259 additions and 205 deletions
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2
net/tipc/addr.c
View File

@ -34,7 +34,7 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "core.h"
#include <linux/kernel.h>
#include "addr.h"
/**

3
net/tipc/addr.h
View File

@ -37,6 +37,9 @@
#ifndef _TIPC_ADDR_H
#define _TIPC_ADDR_H
#include <linux/types.h>
#include <linux/tipc.h>
#define TIPC_ZONE_MASK 0xff000000u
#define TIPC_CLUSTER_MASK 0xfffff000u

297
net/tipc/bcast.c
View File

@ -35,77 +35,14 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "core.h"
#include "link.h"
#include "socket.h"
#include "msg.h"
#include "bcast.h"
#include "name_distr.h"
#include "core.h"
#define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */
#define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */
#define BCBEARER MAX_BEARERS
/**
* struct tipc_bcbearer_pair - a pair of bearers used by broadcast link
* @primary: pointer to primary bearer
* @secondary: pointer to secondary bearer
*
* Bearers must have same priority and same set of reachable destinations
* to be paired.
*/
struct tipc_bcbearer_pair {
struct tipc_bearer *primary;
struct tipc_bearer *secondary;
};
/**
* struct tipc_bcbearer - bearer used by broadcast link
* @bearer: (non-standard) broadcast bearer structure
* @media: (non-standard) broadcast media structure
* @bpairs: array of bearer pairs
* @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort()
* @remains: temporary node map used by tipc_bcbearer_send()
* @remains_new: temporary node map used tipc_bcbearer_send()
*
* Note: The fields labelled "temporary" are incorporated into the bearer
* to avoid consuming potentially limited stack space through the use of
* large local variables within multicast routines. Concurrent access is
* prevented through use of the spinlock "bclink_lock".
*/
struct tipc_bcbearer {
struct tipc_bearer bearer;
struct tipc_media media;
struct tipc_bcbearer_pair bpairs[MAX_BEARERS];
struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1];
struct tipc_node_map remains;
struct tipc_node_map remains_new;
};
/**
* struct tipc_bclink - link used for broadcast messages
* @lock: spinlock governing access to structure
* @link: (non-standard) broadcast link structure
* @node: (non-standard) node structure representing b'cast link's peer node
* @flags: represent bclink states
* @bcast_nodes: map of broadcast-capable nodes
* @retransmit_to: node that most recently requested a retransmit
*
* Handles sequence numbering, fragmentation, bundling, etc.
*/
struct tipc_bclink {
spinlock_t lock;
struct tipc_link link;
struct tipc_node node;
unsigned int flags;
struct tipc_node_map bcast_nodes;
struct tipc_node *retransmit_to;
};
static struct tipc_bcbearer *bcbearer;
static struct tipc_bclink *bclink;
static struct tipc_link *bcl;
const char tipc_bclink_name[] = "broadcast-link";
@ -115,25 +52,28 @@ static void tipc_nmap_diff(struct tipc_node_map *nm_a,
static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node);
static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node);
static void tipc_bclink_lock(void)
static void tipc_bclink_lock(struct net *net)
{
spin_lock_bh(&bclink->lock);
struct tipc_net *tn = net_generic(net, tipc_net_id);
spin_lock_bh(&tn->bclink->lock);
}
static void tipc_bclink_unlock(void)
static void tipc_bclink_unlock(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_node *node = NULL;
if (likely(!bclink->flags)) {
spin_unlock_bh(&bclink->lock);
if (likely(!tn->bclink->flags)) {
spin_unlock_bh(&tn->bclink->lock);
return;
}
if (bclink->flags & TIPC_BCLINK_RESET) {
bclink->flags &= ~TIPC_BCLINK_RESET;
node = tipc_bclink_retransmit_to();
if (tn->bclink->flags & TIPC_BCLINK_RESET) {
tn->bclink->flags &= ~TIPC_BCLINK_RESET;
node = tipc_bclink_retransmit_to(net);
}
spin_unlock_bh(&bclink->lock);
spin_unlock_bh(&tn->bclink->lock);
if (node)
tipc_link_reset_all(node);
@ -144,9 +84,11 @@ uint tipc_bclink_get_mtu(void)
return MAX_PKT_DEFAULT_MCAST;
}
void tipc_bclink_set_flags(unsigned int flags)
void tipc_bclink_set_flags(struct net *net, unsigned int flags)
{
bclink->flags |= flags;
struct tipc_net *tn = net_generic(net, tipc_net_id);
tn->bclink->flags |= flags;
}
static u32 bcbuf_acks(struct sk_buff *buf)
@ -164,31 +106,40 @@ static void bcbuf_decr_acks(struct sk_buff *buf)
bcbuf_set_acks(buf, bcbuf_acks(buf) - 1);
}
void tipc_bclink_add_node(u32 addr)
void tipc_bclink_add_node(struct net *net, u32 addr)
{
tipc_bclink_lock();
tipc_nmap_add(&bclink->bcast_nodes, addr);
tipc_bclink_unlock();
struct tipc_net *tn = net_generic(net, tipc_net_id);
tipc_bclink_lock(net);
tipc_nmap_add(&tn->bclink->bcast_nodes, addr);
tipc_bclink_unlock(net);
}
void tipc_bclink_remove_node(u32 addr)
void tipc_bclink_remove_node(struct net *net, u32 addr)
{
tipc_bclink_lock();
tipc_nmap_remove(&bclink->bcast_nodes, addr);
tipc_bclink_unlock();
struct tipc_net *tn = net_generic(net, tipc_net_id);
tipc_bclink_lock(net);
tipc_nmap_remove(&tn->bclink->bcast_nodes, addr);
tipc_bclink_unlock(net);
}
static void bclink_set_last_sent(void)
static void bclink_set_last_sent(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
if (bcl->next_out)
bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1);
else
bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1);
}
u32 tipc_bclink_get_last_sent(void)
u32 tipc_bclink_get_last_sent(struct net *net)
{
return bcl->fsm_msg_cnt;
struct tipc_net *tn = net_generic(net, tipc_net_id);
return tn->bcl->fsm_msg_cnt;
}
static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
@ -203,9 +154,11 @@ static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
*
* Called with bclink_lock locked
*/
struct tipc_node *tipc_bclink_retransmit_to(void)
struct tipc_node *tipc_bclink_retransmit_to(struct net *net)
{
return bclink->retransmit_to;
struct tipc_net *tn = net_generic(net, tipc_net_id);
return tn->bclink->retransmit_to;
}
/**
@ -215,9 +168,10 @@ struct tipc_node *tipc_bclink_retransmit_to(void)
*
* Called with bclink_lock locked
*/
static void bclink_retransmit_pkt(u32 after, u32 to)
static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to)
{
struct sk_buff *skb;
struct tipc_link *bcl = tn->bcl;
skb_queue_walk(&bcl->outqueue, skb) {
if (more(buf_seqno(skb), after)) {
@ -234,9 +188,10 @@ static void bclink_retransmit_pkt(u32 after, u32 to)
*/
void tipc_bclink_wakeup_users(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct sk_buff *skb;
while ((skb = skb_dequeue(&bclink->link.waiting_sks)))
while ((skb = skb_dequeue(&tn->bclink->link.waiting_sks)))
tipc_sk_rcv(net, skb);
}
@ -252,10 +207,12 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
struct sk_buff *skb, *tmp;
struct sk_buff *next;
unsigned int released = 0;
struct net *net = n_ptr->net;
struct tipc_net *tn = net_generic(net, tipc_net_id);
tipc_bclink_lock();
tipc_bclink_lock(net);
/* Bail out if tx queue is empty (no clean up is required) */
skb = skb_peek(&bcl->outqueue);
skb = skb_peek(&tn->bcl->outqueue);
if (!skb)
goto exit;
@ -266,43 +223,43 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
* acknowledge sent messages only (if other nodes still exist)
* or both sent and unsent messages (otherwise)
*/
if (bclink->bcast_nodes.count)
acked = bcl->fsm_msg_cnt;
if (tn->bclink->bcast_nodes.count)
acked = tn->bcl->fsm_msg_cnt;
else
acked = bcl->next_out_no;
acked = tn->bcl->next_out_no;
} else {
/*
* Bail out if specified sequence number does not correspond
* to a message that has been sent and not yet acknowledged
*/
if (less(acked, buf_seqno(skb)) ||
less(bcl->fsm_msg_cnt, acked) ||
less(tn->bcl->fsm_msg_cnt, acked) ||
less_eq(acked, n_ptr->bclink.acked))
goto exit;
}
/* Skip over packets that node has previously acknowledged */
skb_queue_walk(&bcl->outqueue, skb) {
skb_queue_walk(&tn->bcl->outqueue, skb) {
if (more(buf_seqno(skb), n_ptr->bclink.acked))
break;
}
/* Update packets that node is now acknowledging */
skb_queue_walk_from_safe(&bcl->outqueue, skb, tmp) {
skb_queue_walk_from_safe(&tn->bcl->outqueue, skb, tmp) {
if (more(buf_seqno(skb), acked))
break;
next = tipc_skb_queue_next(&bcl->outqueue, skb);
if (skb != bcl->next_out) {
next = tipc_skb_queue_next(&tn->bcl->outqueue, skb);
if (skb != tn->bcl->next_out) {
bcbuf_decr_acks(skb);
} else {
bcbuf_set_acks(skb, 0);
bcl->next_out = next;
bclink_set_last_sent();
tn->bcl->next_out = next;
bclink_set_last_sent(net);
}
if (bcbuf_acks(skb) == 0) {
__skb_unlink(skb, &bcl->outqueue);
__skb_unlink(skb, &tn->bcl->outqueue);
kfree_skb(skb);
released = 1;
}
@ -310,15 +267,15 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
n_ptr->bclink.acked = acked;
/* Try resolving broadcast link congestion, if necessary */
if (unlikely(bcl->next_out)) {
tipc_link_push_packets(bcl);
bclink_set_last_sent();
if (unlikely(tn->bcl->next_out)) {
tipc_link_push_packets(tn->bcl);
bclink_set_last_sent(net);
}
if (unlikely(released && !skb_queue_empty(&bcl->waiting_sks)))
if (unlikely(released && !skb_queue_empty(&tn->bcl->waiting_sks)))
n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS;
exit:
tipc_bclink_unlock();
tipc_bclink_unlock(net);
}
/**
@ -368,10 +325,10 @@ void tipc_bclink_update_link_state(struct net *net, struct tipc_node *n_ptr,
msg_set_bcgap_after(msg, n_ptr->bclink.last_in);
msg_set_bcgap_to(msg, to);
tipc_bclink_lock();
tipc_bclink_lock(net);
tipc_bearer_send(net, MAX_BEARERS, buf, NULL);
bcl->stats.sent_nacks++;
tipc_bclink_unlock();
tn->bcl->stats.sent_nacks++;
tipc_bclink_unlock(net);
kfree_skb(buf);
n_ptr->bclink.oos_state++;
@ -410,6 +367,9 @@ static void bclink_peek_nack(struct net *net, struct tipc_msg *msg)
*/
int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
struct tipc_bclink *bclink = tn->bclink;
int rc = 0;
int bc = 0;
struct sk_buff *skb;
@ -423,19 +383,19 @@ int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list)
/* Broadcast to all other nodes */
if (likely(bclink)) {
tipc_bclink_lock();
tipc_bclink_lock(net);
if (likely(bclink->bcast_nodes.count)) {
rc = __tipc_link_xmit(net, bcl, list);
if (likely(!rc)) {
u32 len = skb_queue_len(&bcl->outqueue);
bclink_set_last_sent();
bclink_set_last_sent(net);
bcl->stats.queue_sz_counts++;
bcl->stats.accu_queue_sz += len;
}
bc = 1;
}
tipc_bclink_unlock();
tipc_bclink_unlock(net);
}
if (unlikely(!bc))
@ -457,10 +417,12 @@ int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list)
*/
static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
{
struct tipc_net *tn = net_generic(node->net, tipc_net_id);
bclink_update_last_sent(node, seqno);
node->bclink.last_in = seqno;
node->bclink.oos_state = 0;
bcl->stats.recv_info++;
tn->bcl->stats.recv_info++;
/*
* Unicast an ACK periodically, ensuring that
@ -469,7 +431,7 @@ static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
if (((seqno - tipc_own_addr) % TIPC_MIN_LINK_WIN) == 0) {
tipc_link_proto_xmit(node->active_links[node->addr & 1],
STATE_MSG, 0, 0, 0, 0, 0);
bcl->stats.sent_acks++;
tn->bcl->stats.sent_acks++;
}
}
@ -481,6 +443,7 @@ static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
struct tipc_msg *msg = buf_msg(buf);
struct tipc_node *node;
u32 next_in;
@ -506,12 +469,12 @@ void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
if (msg_destnode(msg) == tipc_own_addr) {
tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
tipc_node_unlock(node);
tipc_bclink_lock();
tipc_bclink_lock(net);
bcl->stats.recv_nacks++;
bclink->retransmit_to = node;
bclink_retransmit_pkt(msg_bcgap_after(msg),
tn->bclink->retransmit_to = node;
bclink_retransmit_pkt(tn, msg_bcgap_after(msg),
msg_bcgap_to(msg));
tipc_bclink_unlock();
tipc_bclink_unlock(net);
} else {
tipc_node_unlock(node);
bclink_peek_nack(net, msg);
@ -527,47 +490,47 @@ void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
receive:
/* Deliver message to destination */
if (likely(msg_isdata(msg))) {
tipc_bclink_lock();
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
tipc_node_unlock(node);
if (likely(msg_mcast(msg)))
tipc_sk_mcast_rcv(net, buf);
else
kfree_skb(buf);
} else if (msg_user(msg) == MSG_BUNDLER) {
tipc_bclink_lock();
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
bcl->stats.recv_bundles++;
bcl->stats.recv_bundled += msg_msgcnt(msg);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
tipc_node_unlock(node);
tipc_link_bundle_rcv(net, buf);
} else if (msg_user(msg) == MSG_FRAGMENTER) {
tipc_buf_append(&node->bclink.reasm_buf, &buf);
if (unlikely(!buf && !node->bclink.reasm_buf))
goto unlock;
tipc_bclink_lock();
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
bcl->stats.recv_fragments++;
if (buf) {
bcl->stats.recv_fragmented++;
msg = buf_msg(buf);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
goto receive;
}
tipc_bclink_unlock();
tipc_bclink_unlock(net);
tipc_node_unlock(node);
} else if (msg_user(msg) == NAME_DISTRIBUTOR) {
tipc_bclink_lock();
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
tipc_node_unlock(node);
tipc_named_rcv(net, buf);
} else {
tipc_bclink_lock();
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
tipc_node_unlock(node);
kfree_skb(buf);
}
@ -605,14 +568,14 @@ receive:
buf = NULL;
}
tipc_bclink_lock();
tipc_bclink_lock(net);
if (deferred)
bcl->stats.deferred_recv++;
else
bcl->stats.duplicates++;
tipc_bclink_unlock();
tipc_bclink_unlock(net);
unlock:
tipc_node_unlock(node);
@ -623,7 +586,7 @@ exit:
u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
{
return (n_ptr->bclink.recv_permitted &&
(tipc_bclink_get_last_sent() != n_ptr->bclink.acked));
(tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked));
}
@ -636,13 +599,15 @@ u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
* Returns 0 (packet sent successfully) under all circumstances,
* since the broadcast link's pseudo-bearer never blocks
*/
static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1,
static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf,
struct tipc_bearer *unused1,
struct tipc_media_addr *unused2)
{
int bp_index;
struct tipc_msg *msg = buf_msg(buf);
struct net *net = sock_net(buf->sk);
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_bcbearer *bcbearer = tn->bcbearer;
struct tipc_bclink *bclink = tn->bclink;
/* Prepare broadcast link message for reliable transmission,
* if first time trying to send it;
@ -653,7 +618,7 @@ static int tipc_bcbearer_send(struct sk_buff *buf, struct tipc_bearer *unused1,
bcbuf_set_acks(buf, bclink->bcast_nodes.count);
msg_set_non_seq(msg, 1);
msg_set_mc_netid(msg, tn->net_id);
bcl->stats.sent_info++;
tn->bcl->stats.sent_info++;
if (WARN_ON(!bclink->bcast_nodes.count)) {
dump_stack();
@ -708,13 +673,14 @@ void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
u32 node, bool action)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_bcbearer *bcbearer = tn->bcbearer;
struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp;
struct tipc_bcbearer_pair *bp_curr;
struct tipc_bearer *b;
int b_index;
int pri;
tipc_bclink_lock();
tipc_bclink_lock(net);
if (action)
tipc_nmap_add(nm_ptr, node);
@ -761,7 +727,7 @@ void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
bp_curr++;
}
tipc_bclink_unlock();
tipc_bclink_unlock(net);
}
static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb,
@ -815,17 +781,19 @@ msg_full:
return -EMSGSIZE;
}
int tipc_nl_add_bc_link(struct tipc_nl_msg *msg)
int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg)
{
int err;
void *hdr;
struct nlattr *attrs;
struct nlattr *prop;
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
if (!bcl)
return 0;
tipc_bclink_lock();
tipc_bclink_lock(net);
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
NLM_F_MULTI, TIPC_NL_LINK_GET);
@ -860,7 +828,7 @@ int tipc_nl_add_bc_link(struct tipc_nl_msg *msg)
if (err)
goto attr_msg_full;
tipc_bclink_unlock();
tipc_bclink_unlock(net);
nla_nest_end(msg->skb, attrs);
genlmsg_end(msg->skb, hdr);
@ -871,21 +839,23 @@ prop_msg_full:
attr_msg_full:
nla_nest_cancel(msg->skb, attrs);
msg_full:
tipc_bclink_unlock();
tipc_bclink_unlock(net);
genlmsg_cancel(msg->skb, hdr);
return -EMSGSIZE;
}
int tipc_bclink_stats(char *buf, const u32 buf_size)
int tipc_bclink_stats(struct net *net, char *buf, const u32 buf_size)
{
int ret;
struct tipc_stats *s;
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
if (!bcl)
return 0;
tipc_bclink_lock();
tipc_bclink_lock(net);
s = &bcl->stats;
@ -914,37 +884,46 @@ int tipc_bclink_stats(char *buf, const u32 buf_size)
s->queue_sz_counts ?
(s->accu_queue_sz / s->queue_sz_counts) : 0);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
return ret;
}
int tipc_bclink_reset_stats(void)
int tipc_bclink_reset_stats(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
if (!bcl)
return -ENOPROTOOPT;
tipc_bclink_lock();
tipc_bclink_lock(net);
memset(&bcl->stats, 0, sizeof(bcl->stats));
tipc_bclink_unlock();
tipc_bclink_unlock(net);
return 0;
}
int tipc_bclink_set_queue_limits(u32 limit)
int tipc_bclink_set_queue_limits(struct net *net, u32 limit)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_link *bcl = tn->bcl;
if (!bcl)
return -ENOPROTOOPT;
if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN))
return -EINVAL;
tipc_bclink_lock();
tipc_bclink_lock(net);
tipc_link_set_queue_limits(bcl, limit);
tipc_bclink_unlock();
tipc_bclink_unlock(net);
return 0;
}
int tipc_bclink_init(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_bcbearer *bcbearer;
struct tipc_bclink *bclink;
struct tipc_link *bcl;
bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC);
if (!bcbearer)
@ -969,12 +948,16 @@ int tipc_bclink_init(struct net *net)
spin_lock_init(&bclink->node.lock);
__skb_queue_head_init(&bclink->node.waiting_sks);
bcl->owner = &bclink->node;
bcl->owner->net = net;
bcl->max_pkt = MAX_PKT_DEFAULT_MCAST;
tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT);
bcl->bearer_id = MAX_BEARERS;
rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer);
bcl->state = WORKING_WORKING;
strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME);
tn->bcbearer = bcbearer;
tn->bclink = bclink;
tn->bcl = bcl;
return 0;
}
@ -982,14 +965,14 @@ void tipc_bclink_stop(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
tipc_bclink_lock();
tipc_link_purge_queues(bcl);
tipc_bclink_unlock();
tipc_bclink_lock(net);
tipc_link_purge_queues(tn->bcl);
tipc_bclink_unlock(net);
RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL);
synchronize_net();
kfree(bcbearer);
kfree(bclink);
kfree(tn->bcbearer);
kfree(tn->bclink);
}
/**

97
net/tipc/bcast.h
View File

@ -37,23 +37,13 @@
#ifndef _TIPC_BCAST_H
#define _TIPC_BCAST_H
#include "netlink.h"
#include <linux/tipc_config.h>
#include "link.h"
#include "node.h"
#define MAX_NODES 4096
#define WSIZE 32
#define TIPC_BCLINK_RESET 1
/**
* struct tipc_node_map - set of node identifiers
* @count: # of nodes in set
* @map: bitmap of node identifiers that are in the set
*/
struct tipc_node_map {
u32 count;
u32 map[MAX_NODES / WSIZE];
};
#define PLSIZE 32
#define TIPC_BCLINK_RESET 1
#define PLSIZE 32
#define BCBEARER MAX_BEARERS
/**
* struct tipc_port_list - set of node local destination ports
@ -67,9 +57,64 @@ struct tipc_port_list {
u32 ports[PLSIZE];
};
/**
* struct tipc_bcbearer_pair - a pair of bearers used by broadcast link
* @primary: pointer to primary bearer
* @secondary: pointer to secondary bearer
*
* Bearers must have same priority and same set of reachable destinations
* to be paired.
*/
struct tipc_bcbearer_pair {
struct tipc_bearer *primary;
struct tipc_bearer *secondary;
};
/**
* struct tipc_bcbearer - bearer used by broadcast link
* @bearer: (non-standard) broadcast bearer structure
* @media: (non-standard) broadcast media structure
* @bpairs: array of bearer pairs
* @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort()
* @remains: temporary node map used by tipc_bcbearer_send()
* @remains_new: temporary node map used tipc_bcbearer_send()
*
* Note: The fields labelled "temporary" are incorporated into the bearer
* to avoid consuming potentially limited stack space through the use of
* large local variables within multicast routines. Concurrent access is
* prevented through use of the spinlock "bclink_lock".
*/
struct tipc_bcbearer {
struct tipc_bearer bearer;
struct tipc_media media;
struct tipc_bcbearer_pair bpairs[MAX_BEARERS];
struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1];
struct tipc_node_map remains;
struct tipc_node_map remains_new;
};
/**
* struct tipc_bclink - link used for broadcast messages
* @lock: spinlock governing access to structure
* @link: (non-standard) broadcast link structure
* @node: (non-standard) node structure representing b'cast link's peer node
* @flags: represent bclink states
* @bcast_nodes: map of broadcast-capable nodes
* @retransmit_to: node that most recently requested a retransmit
*
* Handles sequence numbering, fragmentation, bundling, etc.
*/
struct tipc_bclink {
spinlock_t lock;
struct tipc_link link;
struct tipc_node node;
unsigned int flags;
struct tipc_node_map bcast_nodes;
struct tipc_node *retransmit_to;
};
struct tipc_node;
extern const char tipc_bclink_name[];
/**
@ -86,24 +131,24 @@ void tipc_port_list_free(struct tipc_port_list *pl_ptr);
int tipc_bclink_init(struct net *net);
void tipc_bclink_stop(struct net *net);
void tipc_bclink_set_flags(unsigned int flags);
void tipc_bclink_add_node(u32 addr);
void tipc_bclink_remove_node(u32 addr);
struct tipc_node *tipc_bclink_retransmit_to(void);
void tipc_bclink_set_flags(struct net *tn, unsigned int flags);
void tipc_bclink_add_node(struct net *net, u32 addr);
void tipc_bclink_remove_node(struct net *net, u32 addr);
struct tipc_node *tipc_bclink_retransmit_to(struct net *tn);
void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked);
void tipc_bclink_rcv(struct net *net, struct sk_buff *buf);
u32 tipc_bclink_get_last_sent(void);
u32 tipc_bclink_get_last_sent(struct net *net);
u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr);
void tipc_bclink_update_link_state(struct net *net, struct tipc_node *n_ptr,
u32 last_sent);
int tipc_bclink_stats(char *stats_buf, const u32 buf_size);
int tipc_bclink_reset_stats(void);
int tipc_bclink_set_queue_limits(u32 limit);
int tipc_bclink_stats(struct net *net, char *stats_buf, const u32 buf_size);
int tipc_bclink_reset_stats(struct net *net);
int tipc_bclink_set_queue_limits(struct net *net, u32 limit);
void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
u32 node, bool action);
uint tipc_bclink_get_mtu(void);
int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list);
void tipc_bclink_wakeup_users(struct net *net);
int tipc_nl_add_bc_link(struct tipc_nl_msg *msg);
int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg);
#endif

7
net/tipc/bearer.c
View File

@ -40,6 +40,7 @@
#include "bearer.h"
#include "link.h"
#include "discover.h"
#include "bcast.h"
#define MAX_ADDR_STR 60
@ -482,8 +483,8 @@ void tipc_disable_l2_media(struct tipc_bearer *b)
* @b_ptr: the bearer through which the packet is to be sent
* @dest: peer destination address
*/
int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b,
struct tipc_media_addr *dest)
int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
struct tipc_bearer *b, struct tipc_media_addr *dest)
{
struct sk_buff *clone;
struct net_device *dev;
@ -528,7 +529,7 @@ void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
rcu_read_lock();
b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
if (likely(b_ptr))
b_ptr->media->send_msg(buf, b_ptr, dest);
b_ptr->media->send_msg(net, buf, b_ptr, dest);
rcu_read_unlock();
}

21
net/tipc/bearer.h
View File

@ -37,12 +37,13 @@
#ifndef _TIPC_BEARER_H
#define _TIPC_BEARER_H
#include "bcast.h"
#include "netlink.h"
#include <net/genetlink.h>
#define MAX_BEARERS 2
#define MAX_MEDIA 2
#define MAX_NODES 4096
#define WSIZE 32
/* Identifiers associated with TIPC message header media address info
* - address info field is 32 bytes long
@ -58,6 +59,16 @@
#define TIPC_MEDIA_TYPE_ETH 1
#define TIPC_MEDIA_TYPE_IB 2
/**
* struct tipc_node_map - set of node identifiers
* @count: # of nodes in set
* @map: bitmap of node identifiers that are in the set
*/
struct tipc_node_map {
u32 count;
u32 map[MAX_NODES / WSIZE];
};
/**
* struct tipc_media_addr - destination address used by TIPC bearers
* @value: address info (format defined by media)
@ -89,7 +100,7 @@ struct tipc_bearer;
* @name: media name
*/
struct tipc_media {
int (*send_msg)(struct sk_buff *buf,
int (*send_msg)(struct net *net, struct sk_buff *buf,
struct tipc_bearer *b_ptr,
struct tipc_media_addr *dest);
int (*enable_media)(struct net *net, struct tipc_bearer *b_ptr);
@ -157,8 +168,6 @@ struct tipc_bearer_names {
char if_name[TIPC_MAX_IF_NAME];
};
struct tipc_link;
/*
* TIPC routines available to supported media types
*/
@ -193,8 +202,8 @@ void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
struct sk_buff *tipc_media_get_names(void);
int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b);
void tipc_disable_l2_media(struct tipc_bearer *b);
int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b,
struct tipc_media_addr *dest);
int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
struct tipc_bearer *b, struct tipc_media_addr *dest);
struct sk_buff *tipc_bearer_get_names(struct net *net);
void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest);

10
net/tipc/core.h
View File

@ -61,6 +61,11 @@
#include "node.h"
#include "bearer.h"
#include "bcast.h"
#include "netlink.h"
#include "link.h"
#include "node.h"
#include "msg.h"
#define TIPC_MOD_VER "2.0.0"
@ -91,6 +96,11 @@ struct tipc_net {
/* Bearer list */
struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
/* Broadcast link */
struct tipc_bcbearer *bcbearer;
struct tipc_bclink *bclink;
struct tipc_link *bcl;
};
#ifdef CONFIG_SYSCTL

17
net/tipc/link.c
View File

@ -941,6 +941,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
struct sk_buff *buf)
{
struct tipc_msg *msg = buf_msg(buf);
struct net *net = l_ptr->owner->net;
pr_warn("Retransmission failure on link <%s>\n", l_ptr->name);
@ -958,7 +959,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
pr_cont("Outstanding acks: %lu\n",
(unsigned long) TIPC_SKB_CB(buf)->handle);
n_ptr = tipc_bclink_retransmit_to();
n_ptr = tipc_bclink_retransmit_to(net);
tipc_node_lock(n_ptr);
tipc_addr_string_fill(addr_string, n_ptr->addr);
@ -973,7 +974,7 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
tipc_node_unlock(n_ptr);
tipc_bclink_set_flags(TIPC_BCLINK_RESET);
tipc_bclink_set_flags(net, TIPC_BCLINK_RESET);
l_ptr->stale_count = 0;
}
}
@ -1404,7 +1405,7 @@ void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int probe_msg,
msg_set_type(msg, msg_typ);
msg_set_net_plane(msg, l_ptr->net_plane);
msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in);
msg_set_last_bcast(msg, tipc_bclink_get_last_sent());
msg_set_last_bcast(msg, tipc_bclink_get_last_sent(l_ptr->owner->net));
if (msg_typ == STATE_MSG) {
u32 next_sent = mod(l_ptr->next_out_no);
@ -2105,7 +2106,7 @@ struct sk_buff *tipc_link_cmd_config(struct net *net, const void *req_tlv_area,
if (!strcmp(args->name, tipc_bclink_name)) {
if ((cmd == TIPC_CMD_SET_LINK_WINDOW) &&
(tipc_bclink_set_queue_limits(new_value) == 0))
(tipc_bclink_set_queue_limits(net, new_value) == 0))
return tipc_cfg_reply_none();
return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
" (cannot change setting on broadcast link)");
@ -2143,7 +2144,7 @@ struct sk_buff *tipc_link_cmd_reset_stats(struct net *net,
link_name = (char *)TLV_DATA(req_tlv_area);
if (!strcmp(link_name, tipc_bclink_name)) {
if (tipc_bclink_reset_stats())
if (tipc_bclink_reset_stats(net))
return tipc_cfg_reply_error_string("link not found");
return tipc_cfg_reply_none();
}
@ -2191,7 +2192,7 @@ static int tipc_link_stats(struct net *net, const char *name, char *buf,
int ret;
if (!strcmp(name, tipc_bclink_name))
return tipc_bclink_stats(buf, buf_size);
return tipc_bclink_stats(net, buf, buf_size);
node = tipc_link_find_owner(net, name, &bearer_id);
if (!node)
@ -2640,7 +2641,7 @@ int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb)
prev_node = node->addr;
}
} else {
err = tipc_nl_add_bc_link(&msg);
err = tipc_nl_add_bc_link(net, &msg);
if (err)
goto out;
@ -2739,7 +2740,7 @@ int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info)
link_name = nla_data(attrs[TIPC_NLA_LINK_NAME]);
if (strcmp(link_name, tipc_bclink_name) == 0) {
err = tipc_bclink_reset_stats();
err = tipc_bclink_reset_stats(net);
if (err)
return err;
return 0;

2
net/tipc/msg.h
View File

@ -37,7 +37,7 @@
#ifndef _TIPC_MSG_H
#define _TIPC_MSG_H
#include "bearer.h"
#include <linux/tipc.h>
/*
* Constants and routines used to read and write TIPC payload message headers

1
net/tipc/name_table.c
View File

@ -39,6 +39,7 @@
#include "name_table.h"
#include "name_distr.h"
#include "subscr.h"
#include "bcast.h"
#define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */

1
net/tipc/net.c
View File

@ -41,6 +41,7 @@
#include "socket.h"
#include "node.h"
#include "config.h"
#include "bcast.h"
static const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
[TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },

6
net/tipc/node.c
View File

@ -368,8 +368,8 @@ static void node_established_contact(struct tipc_node *n_ptr)
{
n_ptr->action_flags |= TIPC_NOTIFY_NODE_UP;
n_ptr->bclink.oos_state = 0;
n_ptr->bclink.acked = tipc_bclink_get_last_sent();
tipc_bclink_add_node(n_ptr->addr);
n_ptr->bclink.acked = tipc_bclink_get_last_sent(n_ptr->net);
tipc_bclink_add_node(n_ptr->net, n_ptr->addr);
}
static void node_lost_contact(struct tipc_node *n_ptr)
@ -389,7 +389,7 @@ static void node_lost_contact(struct tipc_node *n_ptr)
n_ptr->bclink.reasm_buf = NULL;
}
tipc_bclink_remove_node(n_ptr->addr);
tipc_bclink_remove_node(n_ptr->net, n_ptr->addr);
tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ);
n_ptr->bclink.recv_permitted = false;