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-rw-r--r--net/tipc/bcast.c12
-rw-r--r--net/tipc/core.h1
-rw-r--r--net/tipc/group.c372
-rw-r--r--net/tipc/group.h8
-rw-r--r--net/tipc/link.c2
-rw-r--r--net/tipc/msg.c51
-rw-r--r--net/tipc/msg.h3
-rw-r--r--net/tipc/name_table.c57
-rw-r--r--net/tipc/name_table.h9
-rw-r--r--net/tipc/server.c76
-rw-r--r--net/tipc/server.h13
-rw-r--r--net/tipc/socket.c113
-rw-r--r--net/tipc/subscr.c35
-rw-r--r--net/tipc/subscr.h2
14 files changed, 424 insertions, 330 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 329325bd553e..37892b3909af 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -1,7 +1,7 @@
/*
* net/tipc/bcast.c: TIPC broadcast code
*
- * Copyright (c) 2004-2006, 2014-2016, Ericsson AB
+ * Copyright (c) 2004-2006, 2014-2017, Ericsson AB
* Copyright (c) 2004, Intel Corporation.
* Copyright (c) 2005, 2010-2011, Wind River Systems
* All rights reserved.
@@ -42,8 +42,8 @@
#include "link.h"
#include "name_table.h"
-#define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */
-#define BCLINK_WIN_MIN 32 /* bcast minimum link window size */
+#define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */
+#define BCLINK_WIN_MIN 32 /* bcast minimum link window size */
const char tipc_bclink_name[] = "broadcast-link";
@@ -74,6 +74,10 @@ static struct tipc_bc_base *tipc_bc_base(struct net *net)
return tipc_net(net)->bcbase;
}
+/* tipc_bcast_get_mtu(): -get the MTU currently used by broadcast link
+ * Note: the MTU is decremented to give room for a tunnel header, in
+ * case the message needs to be sent as replicast
+ */
int tipc_bcast_get_mtu(struct net *net)
{
return tipc_link_mtu(tipc_bc_sndlink(net)) - INT_H_SIZE;
@@ -515,7 +519,7 @@ int tipc_bcast_init(struct net *net)
spin_lock_init(&tipc_net(net)->bclock);
if (!tipc_link_bc_create(net, 0, 0,
- U16_MAX,
+ FB_MTU,
BCLINK_WIN_DEFAULT,
0,
&bb->inputq,
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 964342689f2c..20b21af2ff14 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -49,7 +49,6 @@
#include <linux/uaccess.h>
#include <linux/interrupt.h>
#include <linux/atomic.h>
-#include <asm/hardirq.h>
#include <linux/netdevice.h>
#include <linux/in.h>
#include <linux/list.h>
diff --git a/net/tipc/group.c b/net/tipc/group.c
index 5f4ffae807ee..497ee34bfab9 100644
--- a/net/tipc/group.c
+++ b/net/tipc/group.c
@@ -49,8 +49,6 @@
#define ADV_ACTIVE (ADV_UNIT * 12)
enum mbr_state {
- MBR_QUARANTINED,
- MBR_DISCOVERED,
MBR_JOINING,
MBR_PUBLISHED,
MBR_JOINED,
@@ -64,8 +62,7 @@ enum mbr_state {
struct tipc_member {
struct rb_node tree_node;
struct list_head list;
- struct list_head congested;
- struct sk_buff *event_msg;
+ struct list_head small_win;
struct sk_buff_head deferredq;
struct tipc_group *group;
u32 node;
@@ -77,21 +74,18 @@ struct tipc_member {
u16 bc_rcv_nxt;
u16 bc_syncpt;
u16 bc_acked;
- bool usr_pending;
};
struct tipc_group {
struct rb_root members;
- struct list_head congested;
+ struct list_head small_win;
struct list_head pending;
struct list_head active;
- struct list_head reclaiming;
struct tipc_nlist dests;
struct net *net;
int subid;
u32 type;
u32 instance;
- u32 domain;
u32 scope;
u32 portid;
u16 member_cnt;
@@ -101,11 +95,27 @@ struct tipc_group {
u16 bc_ackers;
bool loopback;
bool events;
+ bool open;
};
static void tipc_group_proto_xmit(struct tipc_group *grp, struct tipc_member *m,
int mtyp, struct sk_buff_head *xmitq);
+bool tipc_group_is_open(struct tipc_group *grp)
+{
+ return grp->open;
+}
+
+static void tipc_group_open(struct tipc_member *m, bool *wakeup)
+{
+ *wakeup = false;
+ if (list_empty(&m->small_win))
+ return;
+ list_del_init(&m->small_win);
+ m->group->open = true;
+ *wakeup = true;
+}
+
static void tipc_group_decr_active(struct tipc_group *grp,
struct tipc_member *m)
{
@@ -137,14 +147,14 @@ u16 tipc_group_bc_snd_nxt(struct tipc_group *grp)
return grp->bc_snd_nxt;
}
-static bool tipc_group_is_enabled(struct tipc_member *m)
+static bool tipc_group_is_receiver(struct tipc_member *m)
{
- return m->state != MBR_QUARANTINED && m->state != MBR_LEAVING;
+ return m && m->state != MBR_JOINING && m->state != MBR_LEAVING;
}
-static bool tipc_group_is_receiver(struct tipc_member *m)
+static bool tipc_group_is_sender(struct tipc_member *m)
{
- return m && m->state >= MBR_JOINED;
+ return m && m->state != MBR_JOINING && m->state != MBR_PUBLISHED;
}
u32 tipc_group_exclude(struct tipc_group *grp)
@@ -162,6 +172,8 @@ int tipc_group_size(struct tipc_group *grp)
struct tipc_group *tipc_group_create(struct net *net, u32 portid,
struct tipc_group_req *mreq)
{
+ u32 filter = TIPC_SUB_PORTS | TIPC_SUB_NO_STATUS;
+ bool global = mreq->scope != TIPC_NODE_SCOPE;
struct tipc_group *grp;
u32 type = mreq->type;
@@ -169,25 +181,40 @@ struct tipc_group *tipc_group_create(struct net *net, u32 portid,
if (!grp)
return NULL;
tipc_nlist_init(&grp->dests, tipc_own_addr(net));
- INIT_LIST_HEAD(&grp->congested);
+ INIT_LIST_HEAD(&grp->small_win);
INIT_LIST_HEAD(&grp->active);
INIT_LIST_HEAD(&grp->pending);
- INIT_LIST_HEAD(&grp->reclaiming);
grp->members = RB_ROOT;
grp->net = net;
grp->portid = portid;
- grp->domain = addr_domain(net, mreq->scope);
grp->type = type;
grp->instance = mreq->instance;
grp->scope = mreq->scope;
grp->loopback = mreq->flags & TIPC_GROUP_LOOPBACK;
grp->events = mreq->flags & TIPC_GROUP_MEMBER_EVTS;
- if (tipc_topsrv_kern_subscr(net, portid, type, 0, ~0, &grp->subid))
+ filter |= global ? TIPC_SUB_CLUSTER_SCOPE : TIPC_SUB_NODE_SCOPE;
+ if (tipc_topsrv_kern_subscr(net, portid, type, 0, ~0,
+ filter, &grp->subid))
return grp;
kfree(grp);
return NULL;
}
+void tipc_group_join(struct net *net, struct tipc_group *grp, int *sk_rcvbuf)
+{
+ struct rb_root *tree = &grp->members;
+ struct tipc_member *m, *tmp;
+ struct sk_buff_head xmitq;
+
+ skb_queue_head_init(&xmitq);
+ rbtree_postorder_for_each_entry_safe(m, tmp, tree, tree_node) {
+ tipc_group_proto_xmit(grp, m, GRP_JOIN_MSG, &xmitq);
+ tipc_group_update_member(m, 0);
+ }
+ tipc_node_distr_xmit(net, &xmitq);
+ *sk_rcvbuf = tipc_group_rcvbuf_limit(grp);
+}
+
void tipc_group_delete(struct net *net, struct tipc_group *grp)
{
struct rb_root *tree = &grp->members;
@@ -233,7 +260,7 @@ static struct tipc_member *tipc_group_find_dest(struct tipc_group *grp,
struct tipc_member *m;
m = tipc_group_find_member(grp, node, port);
- if (m && tipc_group_is_enabled(m))
+ if (m && tipc_group_is_receiver(m))
return m;
return NULL;
}
@@ -278,7 +305,7 @@ static void tipc_group_add_to_tree(struct tipc_group *grp,
static struct tipc_member *tipc_group_create_member(struct tipc_group *grp,
u32 node, u32 port,
- int state)
+ u32 instance, int state)
{
struct tipc_member *m;
@@ -286,11 +313,12 @@ static struct tipc_member *tipc_group_create_member(struct tipc_group *grp,
if (!m)
return NULL;
INIT_LIST_HEAD(&m->list);
- INIT_LIST_HEAD(&m->congested);
+ INIT_LIST_HEAD(&m->small_win);
__skb_queue_head_init(&m->deferredq);
m->group = grp;
m->node = node;
m->port = port;
+ m->instance = instance;
m->bc_acked = grp->bc_snd_nxt - 1;
grp->member_cnt++;
tipc_group_add_to_tree(grp, m);
@@ -299,9 +327,10 @@ static struct tipc_member *tipc_group_create_member(struct tipc_group *grp,
return m;
}
-void tipc_group_add_member(struct tipc_group *grp, u32 node, u32 port)
+void tipc_group_add_member(struct tipc_group *grp, u32 node,
+ u32 port, u32 instance)
{
- tipc_group_create_member(grp, node, port, MBR_DISCOVERED);
+ tipc_group_create_member(grp, node, port, instance, MBR_PUBLISHED);
}
static void tipc_group_delete_member(struct tipc_group *grp,
@@ -315,7 +344,7 @@ static void tipc_group_delete_member(struct tipc_group *grp,
grp->bc_ackers--;
list_del_init(&m->list);
- list_del_init(&m->congested);
+ list_del_init(&m->small_win);
tipc_group_decr_active(grp, m);
/* If last member on a node, remove node from dest list */
@@ -344,7 +373,7 @@ void tipc_group_update_member(struct tipc_member *m, int len)
struct tipc_group *grp = m->group;
struct tipc_member *_m, *tmp;
- if (!tipc_group_is_enabled(m))
+ if (!tipc_group_is_receiver(m))
return;
m->window -= len;
@@ -352,16 +381,14 @@ void tipc_group_update_member(struct tipc_member *m, int len)
if (m->window >= ADV_IDLE)
return;
- list_del_init(&m->congested);
+ list_del_init(&m->small_win);
- /* Sort member into congested members' list */
- list_for_each_entry_safe(_m, tmp, &grp->congested, congested) {
- if (m->window > _m->window)
- continue;
- list_add_tail(&m->congested, &_m->congested);
- return;
+ /* Sort member into small_window members' list */
+ list_for_each_entry_safe(_m, tmp, &grp->small_win, small_win) {
+ if (_m->window > m->window)
+ break;
}
- list_add_tail(&m->congested, &grp->congested);
+ list_add_tail(&m->small_win, &_m->small_win);
}
void tipc_group_update_bc_members(struct tipc_group *grp, int len, bool ack)
@@ -373,7 +400,7 @@ void tipc_group_update_bc_members(struct tipc_group *grp, int len, bool ack)
for (n = rb_first(&grp->members); n; n = rb_next(n)) {
m = container_of(n, struct tipc_member, tree_node);
- if (tipc_group_is_enabled(m)) {
+ if (tipc_group_is_receiver(m)) {
tipc_group_update_member(m, len);
m->bc_acked = prev;
ackers++;
@@ -394,20 +421,20 @@ bool tipc_group_cong(struct tipc_group *grp, u32 dnode, u32 dport,
int adv, state;
m = tipc_group_find_dest(grp, dnode, dport);
- *mbr = m;
- if (!m)
+ if (!tipc_group_is_receiver(m)) {
+ *mbr = NULL;
return false;
- if (m->usr_pending)
- return true;
+ }
+ *mbr = m;
+
if (m->window >= len)
return false;
- m->usr_pending = true;
+
+ grp->open = false;
/* If not fully advertised, do it now to prevent mutual blocking */
adv = m->advertised;
state = m->state;
- if (state < MBR_JOINED)
- return true;
if (state == MBR_JOINED && adv == ADV_IDLE)
return true;
if (state == MBR_ACTIVE && adv == ADV_ACTIVE)
@@ -425,13 +452,14 @@ bool tipc_group_bc_cong(struct tipc_group *grp, int len)
struct tipc_member *m = NULL;
/* If prev bcast was replicast, reject until all receivers have acked */
- if (grp->bc_ackers)
+ if (grp->bc_ackers) {
+ grp->open = false;
return true;
-
- if (list_empty(&grp->congested))
+ }
+ if (list_empty(&grp->small_win))
return false;
- m = list_first_entry(&grp->congested, struct tipc_member, congested);
+ m = list_first_entry(&grp->small_win, struct tipc_member, small_win);
if (m->window >= len)
return false;
@@ -486,7 +514,7 @@ void tipc_group_filter_msg(struct tipc_group *grp, struct sk_buff_head *inputq,
goto drop;
m = tipc_group_find_member(grp, node, port);
- if (!tipc_group_is_receiver(m))
+ if (!tipc_group_is_sender(m))
goto drop;
if (less(msg_grp_bc_seqno(hdr), m->bc_rcv_nxt))
@@ -573,24 +601,34 @@ void tipc_group_update_rcv_win(struct tipc_group *grp, int blks, u32 node,
switch (m->state) {
case MBR_JOINED:
- /* Reclaim advertised space from least active member */
- if (!list_empty(active) && active_cnt >= reclaim_limit) {
+ /* First, decide if member can go active */
+ if (active_cnt <= max_active) {
+ m->state = MBR_ACTIVE;
+ list_add_tail(&m->list, active);
+ grp->active_cnt++;
+ tipc_group_proto_xmit(grp, m, GRP_ADV_MSG, xmitq);
+ } else {
+ m->state = MBR_PENDING;
+ list_add_tail(&m->list, &grp->pending);
+ }
+
+ if (active_cnt < reclaim_limit)
+ break;
+
+ /* Reclaim from oldest active member, if possible */
+ if (!list_empty(active)) {
rm = list_first_entry(active, struct tipc_member, list);
rm->state = MBR_RECLAIMING;
- list_move_tail(&rm->list, &grp->reclaiming);
+ list_del_init(&rm->list);
tipc_group_proto_xmit(grp, rm, GRP_RECLAIM_MSG, xmitq);
- }
- /* If max active, become pending and wait for reclaimed space */
- if (active_cnt >= max_active) {
- m->state = MBR_PENDING;
- list_add_tail(&m->list, &grp->pending);
break;
}
- /* Otherwise become active */
- m->state = MBR_ACTIVE;
- list_add_tail(&m->list, &grp->active);
- grp->active_cnt++;
- /* Fall through */
+ /* Nobody to reclaim from; - revert oldest pending to JOINED */
+ pm = list_first_entry(&grp->pending, struct tipc_member, list);
+ list_del_init(&pm->list);
+ pm->state = MBR_JOINED;
+ tipc_group_proto_xmit(grp, pm, GRP_ADV_MSG, xmitq);
+ break;
case MBR_ACTIVE:
if (!list_is_last(&m->list, &grp->active))
list_move_tail(&m->list, &grp->active);
@@ -602,12 +640,12 @@ void tipc_group_update_rcv_win(struct tipc_group *grp, int blks, u32 node,
if (m->advertised > ADV_IDLE)
break;
m->state = MBR_JOINED;
+ grp->active_cnt--;
if (m->advertised < ADV_IDLE) {
pr_warn_ratelimited("Rcv unexpected msg after REMIT\n");
tipc_group_proto_xmit(grp, m, GRP_ADV_MSG, xmitq);
}
- grp->active_cnt--;
- list_del_init(&m->list);
+
if (list_empty(&grp->pending))
return;
@@ -619,7 +657,6 @@ void tipc_group_update_rcv_win(struct tipc_group *grp, int blks, u32 node,
tipc_group_proto_xmit(grp, pm, GRP_ADV_MSG, xmitq);
break;
case MBR_RECLAIMING:
- case MBR_DISCOVERED:
case MBR_JOINING:
case MBR_LEAVING:
default:
@@ -627,6 +664,40 @@ void tipc_group_update_rcv_win(struct tipc_group *grp, int blks, u32 node,
}
}
+static void tipc_group_create_event(struct tipc_group *grp,
+ struct tipc_member *m,
+ u32 event, u16 seqno,
+ struct sk_buff_head *inputq)
+{ u32 dnode = tipc_own_addr(grp->net);
+ struct tipc_event evt;
+ struct sk_buff *skb;
+ struct tipc_msg *hdr;
+
+ evt.event = event;
+ evt.found_lower = m->instance;
+ evt.found_upper = m->instance;
+ evt.port.ref = m->port;
+ evt.port.node = m->node;
+ evt.s.seq.type = grp->type;
+ evt.s.seq.lower = m->instance;
+ evt.s.seq.upper = m->instance;
+
+ skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_GRP_MEMBER_EVT,
+ GROUP_H_SIZE, sizeof(evt), dnode, m->node,
+ grp->portid, m->port, 0);
+ if (!skb)
+ return;
+
+ hdr = buf_msg(skb);
+ msg_set_nametype(hdr, grp->type);
+ msg_set_grp_evt(hdr, event);
+ msg_set_dest_droppable(hdr, true);
+ msg_set_grp_bc_seqno(hdr, seqno);
+ memcpy(msg_data(hdr), &evt, sizeof(evt));
+ TIPC_SKB_CB(skb)->orig_member = m->instance;
+ __skb_queue_tail(inputq, skb);
+}
+
static void tipc_group_proto_xmit(struct tipc_group *grp, struct tipc_member *m,
int mtyp, struct sk_buff_head *xmitq)
{
@@ -672,83 +743,73 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup,
u32 node = msg_orignode(hdr);
u32 port = msg_origport(hdr);
struct tipc_member *m, *pm;
- struct tipc_msg *ehdr;
u16 remitted, in_flight;
if (!grp)
return;
+ if (grp->scope == TIPC_NODE_SCOPE && node != tipc_own_addr(grp->net))
+ return;
+
m = tipc_group_find_member(grp, node, port);
switch (msg_type(hdr)) {
case GRP_JOIN_MSG:
if (!m)
m = tipc_group_create_member(grp, node, port,
- MBR_QUARANTINED);
+ 0, MBR_JOINING);
if (!m)
return;
m->bc_syncpt = msg_grp_bc_syncpt(hdr);
m->bc_rcv_nxt = m->bc_syncpt;
m->window += msg_adv_win(hdr);
- /* Wait until PUBLISH event is received */
- if (m->state == MBR_DISCOVERED) {
- m->state = MBR_JOINING;
- } else if (m->state == MBR_PUBLISHED) {
- m->state = MBR_JOINED;
- *usr_wakeup = true;
- m->usr_pending = false;
- tipc_group_proto_xmit(grp, m, GRP_ADV_MSG, xmitq);
- ehdr = buf_msg(m->event_msg);
- msg_set_grp_bc_seqno(ehdr, m->bc_syncpt);
- __skb_queue_tail(inputq, m->event_msg);
- }
- list_del_init(&m->congested);
+ /* Wait until PUBLISH event is received if necessary */
+ if (m->state != MBR_PUBLISHED)
+ return;
+
+ /* Member can be taken into service */
+ m->state = MBR_JOINED;
+ tipc_group_open(m, usr_wakeup);
tipc_group_update_member(m, 0);
+ tipc_group_proto_xmit(grp, m, GRP_ADV_MSG, xmitq);
+ tipc_group_create_event(grp, m, TIPC_PUBLISHED,
+ m->bc_syncpt, inputq);
return;
case GRP_LEAVE_MSG:
if (!m)
return;
m->bc_syncpt = msg_grp_bc_syncpt(hdr);
list_del_init(&m->list);
- list_del_init(&m->congested);
- *usr_wakeup = true;
-
- /* Wait until WITHDRAW event is received */
- if (m->state != MBR_LEAVING) {
- tipc_group_decr_active(grp, m);
- m->state = MBR_LEAVING;
- return;
- }
- /* Otherwise deliver already received WITHDRAW event */
- ehdr = buf_msg(m->event_msg);
- msg_set_grp_bc_seqno(ehdr, m->bc_syncpt);
- __skb_queue_tail(inputq, m->event_msg);
+ tipc_group_open(m, usr_wakeup);
+ tipc_group_decr_active(grp, m);
+ m->state = MBR_LEAVING;
+ tipc_group_create_event(grp, m, TIPC_WITHDRAWN,
+ m->bc_syncpt, inputq);
return;
case GRP_ADV_MSG:
if (!m)
return;
m->window += msg_adv_win(hdr);
- *usr_wakeup = m->usr_pending;
- m->usr_pending = false;
- list_del_init(&m->congested);
+ tipc_group_open(m, usr_wakeup);
return;
case GRP_ACK_MSG:
if (!m)
return;
m->bc_acked = msg_grp_bc_acked(hdr);
if (--grp->bc_ackers)
- break;
+ return;
+ list_del_init(&m->small_win);
+ m->group->open = true;
*usr_wakeup = true;
- m->usr_pending = false;
+ tipc_group_update_member(m, 0);
return;
case GRP_RECLAIM_MSG:
if (!m)
return;
- *usr_wakeup = m->usr_pending;
- m->usr_pending = false;
tipc_group_proto_xmit(grp, m, GRP_REMIT_MSG, xmitq);
m->window = ADV_IDLE;
+ tipc_group_open(m, usr_wakeup);
return;
case GRP_REMIT_MSG:
if (!m || m->state != MBR_RECLAIMING)
@@ -763,18 +824,14 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup,
m->advertised = ADV_IDLE + in_flight;
return;
}
- /* All messages preceding the REMIT have been read */
- if (m->advertised <= remitted) {
- m->state = MBR_JOINED;
- in_flight = 0;
- }
- /* ..and the REMIT overtaken by more messages => re-advertise */
+ /* This should never happen */
if (m->advertised < remitted)
- tipc_group_proto_xmit(grp, m, GRP_ADV_MSG, xmitq);
+ pr_warn_ratelimited("Unexpected REMIT msg\n");
- m->advertised = ADV_IDLE + in_flight;
+ /* All messages preceding the REMIT have been read */
+ m->state = MBR_JOINED;
grp->active_cnt--;
- list_del_init(&m->list);
+ m->advertised = ADV_IDLE;
/* Set oldest pending member to active and advertise */
if (list_empty(&grp->pending))
@@ -796,11 +853,10 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup,
void tipc_group_member_evt(struct tipc_group *grp,
bool *usr_wakeup,
int *sk_rcvbuf,
- struct sk_buff *skb,
+ struct tipc_msg *hdr,
struct sk_buff_head *inputq,
struct sk_buff_head *xmitq)
{
- struct tipc_msg *hdr = buf_msg(skb);
struct tipc_event *evt = (void *)msg_data(hdr);
u32 instance = evt->found_lower;
u32 node = evt->port.node;
@@ -808,89 +864,59 @@ void tipc_group_member_evt(struct tipc_group *grp,
int event = evt->event;
struct tipc_member *m;
struct net *net;
- bool node_up;
u32 self;
if (!grp)
- goto drop;
+ return;
net = grp->net;
self = tipc_own_addr(net);
if (!grp->loopback && node == self && port == grp->portid)
- goto drop;
-
- /* Convert message before delivery to user */
- msg_set_hdr_sz(hdr, GROUP_H_SIZE);
- msg_set_user(hdr, TIPC_CRITICAL_IMPORTANCE);
- msg_set_type(hdr, TIPC_GRP_MEMBER_EVT);
- msg_set_origport(hdr, port);
- msg_set_orignode(hdr, node);
- msg_set_nametype(hdr, grp->type);
- msg_set_grp_evt(hdr, event);
+ return;
m = tipc_group_find_member(grp, node, port);
- if (event == TIPC_PUBLISHED) {
- if (!m)
- m = tipc_group_create_member(grp, node, port,
- MBR_DISCOVERED);
- if (!m)
- goto drop;
-
- /* Hold back event if JOIN message not yet received */
- if (m->state == MBR_DISCOVERED) {
- m->event_msg = skb;
- m->state = MBR_PUBLISHED;
- } else {
- msg_set_grp_bc_seqno(hdr, m->bc_syncpt);
- __skb_queue_tail(inputq, skb);
- m->state = MBR_JOINED;
- *usr_wakeup = true;
- m->usr_pending = false;
+ switch (event) {
+ case TIPC_PUBLISHED:
+ /* Send and wait for arrival of JOIN message if necessary */
+ if (!m) {
+ m = tipc_group_create_member(grp, node, port, instance,
+ MBR_PUBLISHED);
+ if (!m)
+ break;
+ tipc_group_update_member(m, 0);
+ tipc_group_proto_xmit(grp, m, GRP_JOIN_MSG, xmitq);
+ break;
}
+
+ if (m->state != MBR_JOINING)
+ break;
+
+ /* Member can be taken into service */
m->instance = instance;
- TIPC_SKB_CB(skb)->orig_member = m->instance;
+ m->state = MBR_JOINED;
+ tipc_group_open(m, usr_wakeup);
+ tipc_group_update_member(m, 0);
tipc_group_proto_xmit(grp, m, GRP_JOIN_MSG, xmitq);
- if (m->window < ADV_IDLE)
- tipc_group_update_member(m, 0);
- else
- list_del_init(&m->congested);
- } else if (event == TIPC_WITHDRAWN) {
+ tipc_group_create_event(grp, m, TIPC_PUBLISHED,
+ m->bc_syncpt, inputq);
+ break;
+ case TIPC_WITHDRAWN:
if (!m)
- goto drop;
-
- TIPC_SKB_CB(skb)->orig_member = m->instance;
+ break;
- *usr_wakeup = true;
- m->usr_pending = false;
- node_up = tipc_node_is_up(net, node);
- m->event_msg = NULL;
-
- if (node_up) {
- /* Hold back event if a LEAVE msg should be expected */
- if (m->state != MBR_LEAVING) {
- m->event_msg = skb;
- tipc_group_decr_active(grp, m);
- m->state = MBR_LEAVING;
- } else {
- msg_set_grp_bc_seqno(hdr, m->bc_syncpt);
- __skb_queue_tail(inputq, skb);
- }
- } else {
- if (m->state != MBR_LEAVING) {
- tipc_group_decr_active(grp, m);
- m->state = MBR_LEAVING;
- msg_set_grp_bc_seqno(hdr, m->bc_rcv_nxt);
- } else {
- msg_set_grp_bc_seqno(hdr, m->bc_syncpt);
- }
- __skb_queue_tail(inputq, skb);
- }
+ tipc_group_decr_active(grp, m);
+ m->state = MBR_LEAVING;
list_del_init(&m->list);
- list_del_init(&m->congested);
+ tipc_group_open(m, usr_wakeup);
+
+ /* Only send event if no LEAVE message can be expected */
+ if (!tipc_node_is_up(net, node))
+ tipc_group_create_event(grp, m, TIPC_WITHDRAWN,
+ m->bc_rcv_nxt, inputq);
+ break;
+ default:
+ break;
}
*sk_rcvbuf = tipc_group_rcvbuf_limit(grp);
- return;
-drop:
- kfree_skb(skb);
}
diff --git a/net/tipc/group.h b/net/tipc/group.h
index d525e1cd7de5..f4a596ed9848 100644
--- a/net/tipc/group.h
+++ b/net/tipc/group.h
@@ -44,8 +44,10 @@ struct tipc_msg;
struct tipc_group *tipc_group_create(struct net *net, u32 portid,
struct tipc_group_req *mreq);
+void tipc_group_join(struct net *net, struct tipc_group *grp, int *sk_rcv_buf);
void tipc_group_delete(struct net *net, struct tipc_group *grp);
-void tipc_group_add_member(struct tipc_group *grp, u32 node, u32 port);
+void tipc_group_add_member(struct tipc_group *grp, u32 node,
+ u32 port, u32 instance);
struct tipc_nlist *tipc_group_dests(struct tipc_group *grp);
void tipc_group_self(struct tipc_group *grp, struct tipc_name_seq *seq,
int *scope);
@@ -54,7 +56,7 @@ void tipc_group_filter_msg(struct tipc_group *grp,
struct sk_buff_head *inputq,
struct sk_buff_head *xmitq);
void tipc_group_member_evt(struct tipc_group *grp, bool *wakeup,
- int *sk_rcvbuf, struct sk_buff *skb,
+ int *sk_rcvbuf, struct tipc_msg *hdr,
struct sk_buff_head *inputq,
struct sk_buff_head *xmitq);
void tipc_group_proto_rcv(struct tipc_group *grp, bool *wakeup,
@@ -65,9 +67,9 @@ void tipc_group_update_bc_members(struct tipc_group *grp, int len, bool ack);
bool tipc_group_cong(struct tipc_group *grp, u32 dnode, u32 dport,
int len, struct tipc_member **m);
bool tipc_group_bc_cong(struct tipc_group *grp, int len);
+bool tipc_group_is_open(struct tipc_group *grp);
void tipc_group_update_rcv_win(struct tipc_group *grp, int blks, u32 node,
u32 port, struct sk_buff_head *xmitq);
u16 tipc_group_bc_snd_nxt(struct tipc_group *grp);
void tipc_group_update_member(struct tipc_member *m, int len);
-int tipc_group_size(struct tipc_group *grp);
#endif
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 6bce0b1117bd..2d6b2aed30e0 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -483,7 +483,7 @@ bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
/**
* tipc_link_bc_create - create new link to be used for broadcast
* @n: pointer to associated node
- * @mtu: mtu to be used
+ * @mtu: mtu to be used initially if no peers
* @window: send window to be used
* @inputq: queue to put messages ready for delivery
* @namedq: queue to put binding table update messages ready for delivery
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index b0d07b35909d..55d8ba92291d 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -251,20 +251,23 @@ bool tipc_msg_validate(struct sk_buff **_skb)
* @pktmax: Max packet size that can be used
* @list: Buffer or chain of buffers to be returned to caller
*
+ * Note that the recursive call we are making here is safe, since it can
+ * logically go only one further level down.
+ *
* Returns message data size or errno: -ENOMEM, -EFAULT
*/
-int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
- int offset, int dsz, int pktmax, struct sk_buff_head *list)
+int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, int offset,
+ int dsz, int pktmax, struct sk_buff_head *list)
{
int mhsz = msg_hdr_sz(mhdr);
+ struct tipc_msg pkthdr;
int msz = mhsz + dsz;
- int pktno = 1;
- int pktsz;
int pktrem = pktmax;
- int drem = dsz;
- struct tipc_msg pkthdr;
struct sk_buff *skb;
+ int drem = dsz;
+ int pktno = 1;
char *pktpos;
+ int pktsz;
int rc;
msg_set_size(mhdr, msz);
@@ -272,8 +275,18 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
/* No fragmentation needed? */
if (likely(msz <= pktmax)) {
skb = tipc_buf_acquire(msz, GFP_KERNEL);
- if (unlikely(!skb))
+
+ /* Fall back to smaller MTU if node local message */
+ if (unlikely(!skb)) {
+ if (pktmax != MAX_MSG_SIZE)
+ return -ENOMEM;
+ rc = tipc_msg_build(mhdr, m, offset, dsz, FB_MTU, list);
+ if (rc != dsz)
+ return rc;
+ if (tipc_msg_assemble(list))
+ return dsz;
return -ENOMEM;
+ }
skb_orphan(skb);
__skb_queue_tail(list, skb);
skb_copy_to_linear_data(skb, mhdr, mhsz);
@@ -589,6 +602,30 @@ bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err)
return true;
}
+/* tipc_msg_assemble() - assemble chain of fragments into one message
+ */
+bool tipc_msg_assemble(struct sk_buff_head *list)
+{
+ struct sk_buff *skb, *tmp = NULL;
+
+ if (skb_queue_len(list) == 1)
+ return true;
+
+ while ((skb = __skb_dequeue(list))) {
+ skb->next = NULL;
+ if (tipc_buf_append(&tmp, &skb)) {
+ __skb_queue_tail(list, skb);
+ return true;
+ }
+ if (!tmp)
+ break;
+ }
+ __skb_queue_purge(list);
+ __skb_queue_head_init(list);
+ pr_warn("Failed do assemble buffer\n");
+ return false;
+}
+
/* tipc_msg_reassemble() - clone a buffer chain of fragments and
* reassemble the clones into one message
*/
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 3e4384c222f7..b4ba1b4f9ae7 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -98,7 +98,7 @@ struct plist;
#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
-
+#define FB_MTU 3744
#define TIPC_MEDIA_INFO_OFFSET 5
struct tipc_skb_cb {
@@ -943,6 +943,7 @@ bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
int offset, int dsz, int mtu, struct sk_buff_head *list);
bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
+bool tipc_msg_assemble(struct sk_buff_head *list);
bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
struct sk_buff_head *cpy);
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index b3829bcf63c7..ed0457cc99d6 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -328,7 +328,8 @@ static struct publication *tipc_nameseq_insert_publ(struct net *net,
list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
tipc_subscrp_report_overlap(s, publ->lower, publ->upper,
TIPC_PUBLISHED, publ->ref,
- publ->node, created_subseq);
+ publ->node, publ->scope,
+ created_subseq);
}
return publ;
}
@@ -398,19 +399,21 @@ found:
list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
tipc_subscrp_report_overlap(s, publ->lower, publ->upper,
TIPC_WITHDRAWN, publ->ref,
- publ->node, removed_subseq);
+ publ->node, publ->scope,
+ removed_subseq);
}
return publ;
}
/**
- * tipc_nameseq_subscribe - attach a subscription, and issue
- * the prescribed number of events if there is any sub-
+ * tipc_nameseq_subscribe - attach a subscription, and optionally
+ * issue the prescribed number of events if there is any sub-
* sequence overlapping with the requested sequence
*/
static void tipc_nameseq_subscribe(struct name_seq *nseq,
- struct tipc_subscription *s)
+ struct tipc_subscription *s,
+ bool status)
{
struct sub_seq *sseq = nseq->sseqs;
struct tipc_name_seq ns;
@@ -420,7 +423,7 @@ static void tipc_nameseq_subscribe(struct name_seq *nseq,
tipc_subscrp_get(s);
list_add(&s->nameseq_list, &nseq->subscriptions);
- if (!sseq)
+ if (!status || !sseq)
return;
while (sseq != &nseq->sseqs[nseq->first_free]) {
@@ -434,6 +437,7 @@ static void tipc_nameseq_subscribe(struct name_seq *nseq,
sseq->upper,
TIPC_PUBLISHED,
crs->ref, crs->node,
+ crs->scope,
must_report);
must_report = 0;
}
@@ -597,7 +601,7 @@ not_found:
return ref;
}
-bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
+bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 scope,
struct list_head *dsts, int *dstcnt, u32 exclude,
bool all)
{
@@ -607,9 +611,6 @@ bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
struct name_seq *seq;
struct sub_seq *sseq;
- if (!tipc_in_scope(domain, self))
- return false;
-
*dstcnt = 0;
rcu_read_lock();
seq = nametbl_find_seq(net, type);
@@ -620,7 +621,7 @@ bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
if (likely(sseq)) {
info = sseq->info;
list_for_each_entry(publ, &info->zone_list, zone_list) {
- if (!tipc_in_scope(domain, publ->node))
+ if (publ->scope != scope)
continue;
if (publ->ref == exclude && publ->node == self)
continue;
@@ -638,13 +639,14 @@ exit:
return !list_empty(dsts);
}
-int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper,
- u32 limit, struct list_head *dports)
+int tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper,
+ u32 scope, bool exact, struct list_head *dports)
{
- struct name_seq *seq;
- struct sub_seq *sseq;
struct sub_seq *sseq_stop;
struct name_info *info;
+ struct publication *p;
+ struct name_seq *seq;
+ struct sub_seq *sseq;
int res = 0;
rcu_read_lock();
@@ -656,15 +658,12 @@ int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper,
sseq = seq->sseqs + nameseq_locate_subseq(seq, lower);
sseq_stop = seq->sseqs + seq->first_free;
for (; sseq != sseq_stop; sseq++) {
- struct publication *publ;
-
if (sseq->lower > upper)
break;
-
info = sseq->info;
- list_for_each_entry(publ, &info->node_list, node_list) {
- if (publ->scope <= limit)
- tipc_dest_push(dports, 0, publ->ref);
+ list_for_each_entry(p, &info->node_list, node_list) {
+ if (p->scope == scope || (!exact && p->scope < scope))
+ tipc_dest_push(dports, 0, p->ref);
}
if (info->cluster_list_size != info->node_list_size)
@@ -681,8 +680,7 @@ exit:
* - Determines if any node local ports overlap
*/
void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
- u32 upper, u32 domain,
- struct tipc_nlist *nodes)
+ u32 upper, struct tipc_nlist *nodes)
{
struct sub_seq *sseq, *stop;
struct publication *publ;
@@ -700,8 +698,7 @@ void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
for (; sseq != stop && sseq->lower <= upper; sseq++) {
info = sseq->info;
list_for_each_entry(publ, &info->zone_list, zone_list) {
- if (tipc_in_scope(domain, publ->node))
- tipc_nlist_add(nodes, publ->node);
+ tipc_nlist_add(nodes, publ->node);
}
}
spin_unlock_bh(&seq->lock);
@@ -712,7 +709,7 @@ exit:
/* tipc_nametbl_build_group - build list of communication group members
*/
void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
- u32 type, u32 domain)
+ u32 type, u32 scope)
{
struct sub_seq *sseq, *stop;
struct name_info *info;
@@ -730,9 +727,9 @@ void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
for (; sseq != stop; sseq++) {
info = sseq->info;
list_for_each_entry(p, &info->zone_list, zone_list) {
- if (!tipc_in_scope(domain, p->node))
+ if (p->scope != scope)
continue;
- tipc_group_add_member(grp, p->node, p->ref);
+ tipc_group_add_member(grp, p->node, p->ref, p->lower);
}
}
spin_unlock_bh(&seq->lock);
@@ -811,7 +808,7 @@ int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower, u32 ref,
/**
* tipc_nametbl_subscribe - add a subscription object to the name table
*/
-void tipc_nametbl_subscribe(struct tipc_subscription *s)
+void tipc_nametbl_subscribe(struct tipc_subscription *s, bool status)
{
struct tipc_net *tn = net_generic(s->net, tipc_net_id);
u32 type = tipc_subscrp_convert_seq_type(s->evt.s.seq.type, s->swap);
@@ -825,7 +822,7 @@ void tipc_nametbl_subscribe(struct tipc_subscription *s)
seq = tipc_nameseq_create(type, &tn->nametbl->seq_hlist[index]);
if (seq) {
spin_lock_bh(&seq->lock);
- tipc_nameseq_subscribe(seq, s);
+ tipc_nameseq_subscribe(seq, s, status);
spin_unlock_bh(&seq->lock);
} else {
tipc_subscrp_convert_seq(&s->evt.s.seq, s->swap, &ns);
diff --git a/net/tipc/name_table.h b/net/tipc/name_table.h
index 71926e429446..f56e7cb3d436 100644
--- a/net/tipc/name_table.h
+++ b/net/tipc/name_table.h
@@ -100,13 +100,12 @@ struct name_table {
int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb);
u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *node);
-int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper,
- u32 limit, struct list_head *dports);
+int tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper,
+ u32 scope, bool exact, struct list_head *dports);
void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
u32 type, u32 domain);
void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
- u32 upper, u32 domain,
- struct tipc_nlist *nodes);
+ u32 upper, struct tipc_nlist *nodes);
bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
struct list_head *dsts, int *dstcnt, u32 exclude,
bool all);
@@ -121,7 +120,7 @@ struct publication *tipc_nametbl_insert_publ(struct net *net, u32 type,
struct publication *tipc_nametbl_remove_publ(struct net *net, u32 type,
u32 lower, u32 node, u32 ref,
u32 key);
-void tipc_nametbl_subscribe(struct tipc_subscription *s);
+void tipc_nametbl_subscribe(struct tipc_subscription *s, bool status);
void tipc_nametbl_unsubscribe(struct tipc_subscription *s);
int tipc_nametbl_init(struct net *net);
void tipc_nametbl_stop(struct net *net);
diff --git a/net/tipc/server.c b/net/tipc/server.c
index d60c30342327..c0d331f13eee 100644
--- a/net/tipc/server.c
+++ b/net/tipc/server.c
@@ -132,10 +132,11 @@ static struct tipc_conn *tipc_conn_lookup(struct tipc_server *s, int conid)
spin_lock_bh(&s->idr_lock);
con = idr_find(&s->conn_idr, conid);
- if (con && test_bit(CF_CONNECTED, &con->flags))
- conn_get(con);
- else
- con = NULL;
+ if (con) {
+ if (!test_bit(CF_CONNECTED, &con->flags) ||
+ !kref_get_unless_zero(&con->kref))
+ con = NULL;
+ }
spin_unlock_bh(&s->idr_lock);
return con;
}
@@ -183,35 +184,28 @@ static void tipc_register_callbacks(struct socket *sock, struct tipc_conn *con)
write_unlock_bh(&sk->sk_callback_lock);
}
-static void tipc_unregister_callbacks(struct tipc_conn *con)
-{
- struct sock *sk = con->sock->sk;
-
- write_lock_bh(&sk->sk_callback_lock);
- sk->sk_user_data = NULL;
- write_unlock_bh(&sk->sk_callback_lock);
-}
-
static void tipc_close_conn(struct tipc_conn *con)
{
struct tipc_server *s = con->server;
+ struct sock *sk = con->sock->sk;
+ bool disconnect = false;
- if (test_and_clear_bit(CF_CONNECTED, &con->flags)) {
- if (con->sock)
- tipc_unregister_callbacks(con);
-
+ write_lock_bh(&sk->sk_callback_lock);
+ disconnect = test_and_clear_bit(CF_CONNECTED, &con->flags);
+ if (disconnect) {
+ sk->sk_user_data = NULL;
if (con->conid)
s->tipc_conn_release(con->conid, con->usr_data);
-
- /* We shouldn't flush pending works as we may be in the
- * thread. In fact the races with pending rx/tx work structs
- * are harmless for us here as we have already deleted this
- * connection from server connection list.
- */
- if (con->sock)
- kernel_sock_shutdown(con->sock, SHUT_RDWR);
- conn_put(con);
}
+ write_unlock_bh(&sk->sk_callback_lock);
+
+ /* Handle concurrent calls from sending and receiving threads */
+ if (!disconnect)
+ return;
+
+ /* Don't flush pending works, -just let them expire */
+ kernel_sock_shutdown(con->sock, SHUT_RDWR);
+ conn_put(con);
}
static struct tipc_conn *tipc_alloc_conn(struct tipc_server *s)
@@ -248,9 +242,10 @@ static struct tipc_conn *tipc_alloc_conn(struct tipc_server *s)
static int tipc_receive_from_sock(struct tipc_conn *con)
{
- struct msghdr msg = {};
struct tipc_server *s = con->server;
+ struct sock *sk = con->sock->sk;
struct sockaddr_tipc addr;
+ struct msghdr msg = {};
struct kvec iov;
void *buf;
int ret;
@@ -271,12 +266,15 @@ static int tipc_receive_from_sock(struct tipc_conn *con)
goto out_close;
}
- s->tipc_conn_recvmsg(sock_net(con->sock->sk), con->conid, &addr,
- con->usr_data, buf, ret);
-
+ read_lock_bh(&sk->sk_callback_lock);
+ if (test_bit(CF_CONNECTED, &con->flags))
+ ret = s->tipc_conn_recvmsg(sock_net(con->sock->sk), con->conid,
+ &addr, con->usr_data, buf, ret);
+ read_unlock_bh(&sk->sk_callback_lock);
kmem_cache_free(s->rcvbuf_cache, buf);
-
- return 0;
+ if (ret < 0)
+ tipc_conn_terminate(s, con->conid);
+ return ret;
out_close:
if (ret != -EWOULDBLOCK)
@@ -489,8 +487,8 @@ void tipc_conn_terminate(struct tipc_server *s, int conid)
}
}
-bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type,
- u32 lower, u32 upper, int *conid)
+bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type, u32 lower,
+ u32 upper, u32 filter, int *conid)
{
struct tipc_subscriber *scbr;
struct tipc_subscr sub;
@@ -501,7 +499,7 @@ bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type,
sub.seq.lower = lower;
sub.seq.upper = upper;
sub.timeout = TIPC_WAIT_FOREVER;
- sub.filter = TIPC_SUB_PORTS;
+ sub.filter = filter;
*(u32 *)&sub.usr_handle = port;
con = tipc_alloc_conn(tipc_topsrv(net));
@@ -525,11 +523,17 @@ bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type,
void tipc_topsrv_kern_unsubscr(struct net *net, int conid)
{
struct tipc_conn *con;
+ struct tipc_server *srv;
con = tipc_conn_lookup(tipc_topsrv(net), conid);
if (!con)
return;
- tipc_close_conn(con);
+
+ test_and_clear_bit(CF_CONNECTED, &con->flags);
+ srv = con->server;
+ if (con->conid)
+ srv->tipc_conn_release(con->conid, con->usr_data);
+ conn_put(con);
conn_put(con);
}
diff --git a/net/tipc/server.h b/net/tipc/server.h
index 2113c9192633..64df7513cd70 100644
--- a/net/tipc/server.h
+++ b/net/tipc/server.h
@@ -41,6 +41,9 @@
#include <net/net_namespace.h>
#define TIPC_SERVER_NAME_LEN 32
+#define TIPC_SUB_CLUSTER_SCOPE 0x20
+#define TIPC_SUB_NODE_SCOPE 0x40
+#define TIPC_SUB_NO_STATUS 0x80
/**
* struct tipc_server - TIPC server structure
@@ -71,9 +74,9 @@ struct tipc_server {
int max_rcvbuf_size;
void *(*tipc_conn_new)(int conid);
void (*tipc_conn_release)(int conid, void *usr_data);
- void (*tipc_conn_recvmsg)(struct net *net, int conid,
- struct sockaddr_tipc *addr, void *usr_data,
- void *buf, size_t len);
+ int (*tipc_conn_recvmsg)(struct net *net, int conid,
+ struct sockaddr_tipc *addr, void *usr_data,
+ void *buf, size_t len);
struct sockaddr_tipc *saddr;
char name[TIPC_SERVER_NAME_LEN];
int imp;
@@ -83,8 +86,8 @@ struct tipc_server {
int tipc_conn_sendmsg(struct tipc_server *s, int conid,
struct sockaddr_tipc *addr, void *data, size_t len);
-bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type,
- u32 lower, u32 upper, int *conid);
+bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type, u32 lower,
+ u32 upper, u32 filter, int *conid);
void tipc_topsrv_kern_unsubscr(struct net *net, int conid);
/**
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 3b4084480377..d799e50ff722 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -715,7 +715,7 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
- struct tipc_group *grp = tsk->group;
+ struct tipc_group *grp;
u32 revents = 0;
sock_poll_wait(file, sk_sleep(sk), wait);
@@ -736,9 +736,9 @@ static unsigned int tipc_poll(struct file *file, struct socket *sock,
revents |= POLLIN | POLLRDNORM;
break;
case TIPC_OPEN:
- if (!grp || tipc_group_size(grp))
- if (!tsk->cong_link_cnt)
- revents |= POLLOUT;
+ grp = tsk->group;
+ if ((!grp || tipc_group_is_open(grp)) && !tsk->cong_link_cnt)
+ revents |= POLLOUT;
if (!tipc_sk_type_connectionless(sk))
break;
if (skb_queue_empty(&sk->sk_receive_queue))
@@ -772,7 +772,6 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
struct net *net = sock_net(sk);
int mtu = tipc_bcast_get_mtu(net);
struct tipc_mc_method *method = &tsk->mc_method;
- u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE);
struct sk_buff_head pkts;
struct tipc_nlist dsts;
int rc;
@@ -788,7 +787,7 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
/* Lookup destination nodes */
tipc_nlist_init(&dsts, tipc_own_addr(net));
tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower,
- seq->upper, domain, &dsts);
+ seq->upper, &dsts);
if (!dsts.local && !dsts.remote)
return -EHOSTUNREACH;
@@ -928,21 +927,22 @@ static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m,
struct list_head *cong_links = &tsk->cong_links;
int blks = tsk_blocks(GROUP_H_SIZE + dlen);
struct tipc_group *grp = tsk->group;
+ struct tipc_msg *hdr = &tsk->phdr;
struct tipc_member *first = NULL;
struct tipc_member *mbr = NULL;
struct net *net = sock_net(sk);
u32 node, port, exclude;
- u32 type, inst, domain;
struct list_head dsts;
+ u32 type, inst, scope;
int lookups = 0;
int dstcnt, rc;
bool cong;
INIT_LIST_HEAD(&dsts);
- type = dest->addr.name.name.type;
+ type = msg_nametype(hdr);
inst = dest->addr.name.name.instance;
- domain = addr_domain(net, dest->scope);
+ scope = msg_lookup_scope(hdr);
exclude = tipc_group_exclude(grp);
while (++lookups < 4) {
@@ -950,7 +950,7 @@ static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m,
/* Look for a non-congested destination member, if any */
while (1) {
- if (!tipc_nametbl_lookup(net, type, inst, domain, &dsts,
+ if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
&dstcnt, exclude, false))
return -EHOSTUNREACH;
tipc_dest_pop(&dsts, &node, &port);
@@ -1079,22 +1079,23 @@ static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m,
{
struct sock *sk = sock->sk;
DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
- struct tipc_name_seq *seq = &dest->addr.nameseq;
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_group *grp = tsk->group;
+ struct tipc_msg *hdr = &tsk->phdr;
struct net *net = sock_net(sk);
- u32 domain, exclude, dstcnt;
+ u32 type, inst, scope, exclude;
struct list_head dsts;
+ u32 dstcnt;
INIT_LIST_HEAD(&dsts);
- if (seq->lower != seq->upper)
- return -ENOTSUPP;
-
- domain = addr_domain(net, dest->scope);
+ type = msg_nametype(hdr);
+ inst = dest->addr.name.name.instance;
+ scope = msg_lookup_scope(hdr);
exclude = tipc_group_exclude(grp);
- if (!tipc_nametbl_lookup(net, seq->type, seq->lower, domain,
- &dsts, &dstcnt, exclude, true))
+
+ if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
+ &dstcnt, exclude, true))
return -EHOSTUNREACH;
if (dstcnt == 1) {
@@ -1116,24 +1117,29 @@ static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m,
void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
struct sk_buff_head *inputq)
{
- u32 scope = TIPC_CLUSTER_SCOPE;
u32 self = tipc_own_addr(net);
+ u32 type, lower, upper, scope;
struct sk_buff *skb, *_skb;
- u32 lower = 0, upper = ~0;
- struct sk_buff_head tmpq;
u32 portid, oport, onode;
+ struct sk_buff_head tmpq;
struct list_head dports;
- struct tipc_msg *msg;
- int user, mtyp, hsz;
+ struct tipc_msg *hdr;
+ int user, mtyp, hlen;
+ bool exact;
__skb_queue_head_init(&tmpq);
INIT_LIST_HEAD(&dports);
skb = tipc_skb_peek(arrvq, &inputq->lock);
for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) {
- msg = buf_msg(skb);
- user = msg_user(msg);
- mtyp = msg_type(msg);
+ hdr = buf_msg(skb);
+ user = msg_user(hdr);
+ mtyp = msg_type(hdr);
+ hlen = skb_headroom(skb) + msg_hdr_sz(hdr);
+ oport = msg_origport(hdr);
+ onode = msg_orignode(hdr);
+ type = msg_nametype(hdr);
+
if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) {
spin_lock_bh(&inputq->lock);
if (skb_peek(arrvq) == skb) {
@@ -1144,21 +1150,31 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
spin_unlock_bh(&inputq->lock);
continue;
}
- hsz = skb_headroom(skb) + msg_hdr_sz(msg);
- oport = msg_origport(msg);
- onode = msg_orignode(msg);
- if (onode == self)
- scope = TIPC_NODE_SCOPE;
-
- /* Create destination port list and message clones: */
- if (!msg_in_group(msg)) {
- lower = msg_namelower(msg);
- upper = msg_nameupper(msg);
+
+ /* Group messages require exact scope match */
+ if (msg_in_group(hdr)) {
+ lower = 0;
+ upper = ~0;
+ scope = msg_lookup_scope(hdr);
+ exact = true;
+ } else {
+ /* TIPC_NODE_SCOPE means "any scope" in this context */
+ if (onode == self)
+ scope = TIPC_NODE_SCOPE;
+ else
+ scope = TIPC_CLUSTER_SCOPE;
+ exact = false;
+ lower = msg_namelower(hdr);
+ upper = msg_nameupper(hdr);
}
- tipc_nametbl_mc_translate(net, msg_nametype(msg), lower, upper,
- scope, &dports);
+
+ /* Create destination port list: */
+ tipc_nametbl_mc_lookup(net, type, lower, upper,
+ scope, exact, &dports);
+
+ /* Clone message per destination */
while (tipc_dest_pop(&dports, NULL, &portid)) {
- _skb = __pskb_copy(skb, hsz, GFP_ATOMIC);
+ _skb = __pskb_copy(skb, hlen, GFP_ATOMIC);
if (_skb) {
msg_set_destport(buf_msg(_skb), portid);
__skb_queue_tail(&tmpq, _skb);
@@ -1933,8 +1949,7 @@ static void tipc_sk_proto_rcv(struct sock *sk,
break;
case TOP_SRV:
tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf,
- skb, inputq, xmitq);
- skb = NULL;
+ hdr, inputq, xmitq);
break;
default:
break;
@@ -2640,9 +2655,7 @@ void tipc_sk_reinit(struct net *net)
rhashtable_walk_enter(&tn->sk_rht, &iter);
do {
- tsk = ERR_PTR(rhashtable_walk_start(&iter));
- if (IS_ERR(tsk))
- goto walk_stop;
+ rhashtable_walk_start(&iter);
while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) {
spin_lock_bh(&tsk->sk.sk_lock.slock);
@@ -2651,7 +2664,7 @@ void tipc_sk_reinit(struct net *net)
msg_set_orignode(msg, tn->own_addr);
spin_unlock_bh(&tsk->sk.sk_lock.slock);
}
-walk_stop:
+
rhashtable_walk_stop(&iter);
} while (tsk == ERR_PTR(-EAGAIN));
}
@@ -2734,7 +2747,6 @@ void tipc_sk_rht_destroy(struct net *net)
static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
{
struct net *net = sock_net(&tsk->sk);
- u32 domain = addr_domain(net, mreq->scope);
struct tipc_group *grp = tsk->group;
struct tipc_msg *hdr = &tsk->phdr;
struct tipc_name_seq seq;
@@ -2742,6 +2754,8 @@ static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
if (mreq->type < TIPC_RESERVED_TYPES)
return -EACCES;
+ if (mreq->scope > TIPC_NODE_SCOPE)
+ return -EINVAL;
if (grp)
return -EACCES;
grp = tipc_group_create(net, tsk->portid, mreq);
@@ -2754,16 +2768,17 @@ static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
seq.type = mreq->type;
seq.lower = mreq->instance;
seq.upper = seq.lower;
- tipc_nametbl_build_group(net, grp, mreq->type, domain);
+ tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope);
rc = tipc_sk_publish(tsk, mreq->scope, &seq);
if (rc) {
tipc_group_delete(net, grp);
tsk->group = NULL;
+ return rc;
}
-
- /* Eliminate any risk that a broadcast overtakes the sent JOIN */
+ /* Eliminate any risk that a broadcast overtakes sent JOINs */
tsk->mc_method.rcast = true;
tsk->mc_method.mandatory = true;
+ tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf);
return rc;
}
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 251065dfd8df..68e26470c516 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -118,15 +118,19 @@ void tipc_subscrp_convert_seq(struct tipc_name_seq *in, int swap,
void tipc_subscrp_report_overlap(struct tipc_subscription *sub, u32 found_lower,
u32 found_upper, u32 event, u32 port_ref,
- u32 node, int must)
+ u32 node, u32 scope, int must)
{
+ u32 filter = htohl(sub->evt.s.filter, sub->swap);
struct tipc_name_seq seq;
tipc_subscrp_convert_seq(&sub->evt.s.seq, sub->swap, &seq);
if (!tipc_subscrp_check_overlap(&seq, found_lower, found_upper))
return;
- if (!must &&
- !(htohl(sub->evt.s.filter, sub->swap) & TIPC_SUB_PORTS))
+ if (!must && !(filter & TIPC_SUB_PORTS))
+ return;
+ if (filter & TIPC_SUB_CLUSTER_SCOPE && scope == TIPC_NODE_SCOPE)
+ return;
+ if (filter & TIPC_SUB_NODE_SCOPE && scope != TIPC_NODE_SCOPE)
return;
tipc_subscrp_send_event(sub, found_lower, found_upper, event, port_ref,
@@ -285,21 +289,21 @@ static struct tipc_subscription *tipc_subscrp_create(struct net *net,
return sub;
}
-static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
- struct tipc_subscriber *subscriber, int swap)
+static int tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
+ struct tipc_subscriber *subscriber, int swap,
+ bool status)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_subscription *sub = NULL;
u32 timeout;
sub = tipc_subscrp_create(net, s, swap);
if (!sub)
- return tipc_conn_terminate(tn->topsrv, subscriber->conid);
+ return -1;
spin_lock_bh(&subscriber->lock);
list_add(&sub->subscrp_list, &subscriber->subscrp_list);
sub->subscriber = subscriber;
- tipc_nametbl_subscribe(sub);
+ tipc_nametbl_subscribe(sub, status);
tipc_subscrb_get(subscriber);
spin_unlock_bh(&subscriber->lock);
@@ -308,6 +312,7 @@ static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
if (timeout != TIPC_WAIT_FOREVER)
mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
+ return 0;
}
/* Handle one termination request for the subscriber */
@@ -317,12 +322,13 @@ static void tipc_subscrb_release_cb(int conid, void *usr_data)
}
/* Handle one request to create a new subscription for the subscriber */
-static void tipc_subscrb_rcv_cb(struct net *net, int conid,
- struct sockaddr_tipc *addr, void *usr_data,
- void *buf, size_t len)
+static int tipc_subscrb_rcv_cb(struct net *net, int conid,
+ struct sockaddr_tipc *addr, void *usr_data,
+ void *buf, size_t len)
{
struct tipc_subscriber *subscriber = usr_data;
struct tipc_subscr *s = (struct tipc_subscr *)buf;
+ bool status;
int swap;
/* Determine subscriber's endianness */
@@ -332,10 +338,11 @@ static void tipc_subscrb_rcv_cb(struct net *net, int conid,
/* Detect & process a subscription cancellation request */
if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
- return tipc_subscrp_cancel(s, subscriber);
+ tipc_subscrp_cancel(s, subscriber);
+ return 0;
}
-
- tipc_subscrp_subscribe(net, s, subscriber, swap);
+ status = !(s->filter & htohl(TIPC_SUB_NO_STATUS, swap));
+ return tipc_subscrp_subscribe(net, s, subscriber, swap, status);
}
/* Handle one request to establish a new subscriber */
diff --git a/net/tipc/subscr.h b/net/tipc/subscr.h
index ee52957dc952..f3edca775d9f 100644
--- a/net/tipc/subscr.h
+++ b/net/tipc/subscr.h
@@ -71,7 +71,7 @@ int tipc_subscrp_check_overlap(struct tipc_name_seq *seq, u32 found_lower,
u32 found_upper);
void tipc_subscrp_report_overlap(struct tipc_subscription *sub,
u32 found_lower, u32 found_upper, u32 event,
- u32 port_ref, u32 node, int must);
+ u32 port_ref, u32 node, u32 scope, int must);
void tipc_subscrp_convert_seq(struct tipc_name_seq *in, int swap,
struct tipc_name_seq *out);
u32 tipc_subscrp_convert_seq_type(u32 type, int swap);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.