[PATCH 0/32] TIPC updates

[PATCH 0/32] TIPC updates

[Per Liden]

Here's a resend of the latest TIPC updates. I apologize for not properly 
submitting the patches for review the first time around.

This patch set includes several minor bugfixes. Most of them ported over 
from an older TIPC 1.5.x branch maintained on sourceforge (that branch is 
being phased).

Patches can be pulled from:

	git://tipc.cslab.ericsson.net/pub/git/tipc.git

Summary:

 include/net/tipc/tipc_bearer.h |   12 ++
 net/tipc/bcast.c               |   79 ++++++++-------
 net/tipc/bcast.h               |    2 
 net/tipc/bearer.c              |   70 +++++++------
 net/tipc/cluster.c             |   22 ++--
 net/tipc/config.c              |   85 +++++++---------
 net/tipc/core.c                |    7 +
 net/tipc/core.h                |   21 +++-
 net/tipc/discover.c            |   13 +-
 net/tipc/eth_media.c           |   29 +++--
 net/tipc/link.c                |  217 +++++++++++++++++++++++++++++++---------
 net/tipc/name_distr.c          |   30 ++++--
 net/tipc/name_table.c          |  203 ++++++++++++++++++++-----------------
 net/tipc/node.c                |   78 ++++++++------
 net/tipc/node.h                |    2 
 net/tipc/node_subscr.c         |   15 +--
 net/tipc/port.c                |   41 ++++----
 net/tipc/ref.c                 |   31 +++++-
 net/tipc/socket.c              |  100 +++++++++++-------
 net/tipc/subscr.c              |   18 ++-
 net/tipc/zone.c                |   19 ++--
 21 files changed, 661 insertions(+), 433 deletions(-)

Allan Stephens:
      [TIPC] Prevent name table corruption if no room for new publication
      [TIPC] Use correct upper bound when validating network zone number.
      [TIPC] Corrected potential misuse of tipc_media_addr structure.
      [TIPC] Allow ports to receive multicast messages through native API.
      [TIPC] Links now validate destination node specified by incoming messages.
      [TIPC] Multicast link failure now resets all links to "nacking" node.
      [TIPC] Allow compilation when CONFIG_TIPC_DEBUG is not set.
      [TIPC] Fixed privilege checking typo in dest_name_check().
      [TIPC] Fix misleading comment in buf_discard() routine.
      [TIPC] Added support for MODULE_VERSION capability.
      [TIPC] Validate entire interface name when locating bearer to enable.
      [TIPC] Non-operation-affecting corrections to comments & function definitions.
      [TIPC] Fixed connect() to detect a dest address that is missing or too short.
      [TIPC] Implied connect now saves dest name for retrieval as ancillary data.
      [TIPC] Can now return destination name of form {0,x,y} via ancillary data.
      [TIPC] Connected send now checks socket state when retrying congested send.
      [TIPC] Stream socket send indicates partial success if data partially sent.
      [TIPC] Improved performance of error checking during socket creation.
      [TIPC] recvmsg() now returns TIPC ancillary data using correct level (SOL_TIPC)
      [TIPC] Simplify code for returning partial success of stream send request.
      [TIPC] Optimized argument validation done by connect().
      [TIPC] Withdrawing all names from nameless port now returns success, not error
      [TIPC] Added missing warning for out-of-memory condition
      [TIPC] Fixed memory leak in tipc_link_send() when destination is unreachable
      [TIPC] Disallow config operations that aren't supported in certain modes.
      [TIPC] First phase of assert() cleanup
      [TIPC] Enhanced & cleaned up system messages; fixed 2 obscure memory leaks.
      [TIPC] Fixed link switchover bugs
      [TIPC] Get rid of dynamically allocated arrays in broadcast code.
      [TIPC] Fix incorrect correction to discovery timer frequency computation.

Eric Sesterhenn:
      [TIPC] Fix for NULL pointer dereference

Jon Maloy:
      [TIPC] Improved tolerance to promiscuous mode interface

/Per

[PATCH 1/32] [TIPC] Improved tolerance to promiscuous mode interface

[Per Liden]

From: Jon Maloy <jon.maloy@ericsson.com>

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/eth_media.c |   20 +++++++++++---------
 1 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 7a25278..b646619 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -98,17 +98,19 @@ static int recv_msg(struct sk_buff *buf,
 	u32 size;
 
 	if (likely(eb_ptr->bearer)) {
-		size = msg_size((struct tipc_msg *)buf->data);
-		skb_trim(buf, size);
-		if (likely(buf->len == size)) {
-			buf->next = NULL;
-			tipc_recv_msg(buf, eb_ptr->bearer);
-		} else {
-			kfree_skb(buf);
+	       if (likely(!dev->promiscuity) ||
+	           !memcmp(buf->mac.raw,dev->dev_addr,ETH_ALEN) ||
+	           !memcmp(buf->mac.raw,dev->broadcast,ETH_ALEN)) {
+		        size = msg_size((struct tipc_msg *)buf->data);
+	                skb_trim(buf, size);
+	        	if (likely(buf->len == size)) {
+		        	buf->next = NULL;
+			        tipc_recv_msg(buf, eb_ptr->bearer);
+			        return TIPC_OK;
+			}
 		}
-	} else {
-		kfree_skb(buf);
 	}
+	kfree_skb(buf);
 	return TIPC_OK;
 }
 
-- 
1.4.0

[PATCH 2/32] [TIPC] Prevent name table corruption if no room for new publication

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Now exits cleanly if attempt to allocate larger array of subsequences fails,
without losing track of pointer to existing array.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/name_table.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index d129422..0511436 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -284,18 +284,18 @@ static struct publication *tipc_nameseq_
 		/* Ensure there is space for new sub-sequence */
 
 		if (nseq->first_free == nseq->alloc) {
-			struct sub_seq *sseqs = nseq->sseqs;
-			nseq->sseqs = tipc_subseq_alloc(nseq->alloc * 2);
-			if (nseq->sseqs != NULL) {
-				memcpy(nseq->sseqs, sseqs,
-				       nseq->alloc * sizeof (struct sub_seq));
-				kfree(sseqs);
-				dbg("Allocated %u sseqs\n", nseq->alloc);
-				nseq->alloc *= 2;
-			} else {
+			struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2);
+
+			if (!sseqs) {
 				warn("Memory squeeze; failed to create sub-sequence\n");
 				return NULL;
 			}
+			dbg("Allocated %u more sseqs\n", nseq->alloc);
+			memcpy(sseqs, nseq->sseqs,
+			       nseq->alloc * sizeof(struct sub_seq));
+			kfree(nseq->sseqs);
+			nseq->sseqs = sseqs;
+			nseq->alloc *= 2;
 		}
 		dbg("Have %u sseqs for type %u\n", nseq->alloc, type);
 
-- 
1.4.0

[PATCH 3/32] [TIPC] Use correct upper bound when validating network zone number.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/core.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/tipc/core.c b/net/tipc/core.c
index 3d0a8ee..31c7dd5 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -198,7 +198,7 @@ static int __init tipc_init(void)
 	tipc_max_publications = 10000;
 	tipc_max_subscriptions = 2000;
 	tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536);
-	tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 511);
+	tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 255);
 	tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1);
 	tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047);
 	tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047);
-- 
1.4.0

[PATCH 4/32] [TIPC] Corrected potential misuse of tipc_media_addr structure.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 include/net/tipc/tipc_bearer.h |   12 ++++++++++--
 net/tipc/eth_media.c           |    4 +++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/include/net/tipc/tipc_bearer.h b/include/net/tipc/tipc_bearer.h
index 098607c..e07136d 100644
--- a/include/net/tipc/tipc_bearer.h
+++ b/include/net/tipc/tipc_bearer.h
@@ -49,10 +49,18 @@ #include <linux/spinlock.h>
 
 #define TIPC_MEDIA_TYPE_ETH	1
 
+/* 
+ * Destination address structure used by TIPC bearers when sending messages
+ * 
+ * IMPORTANT: The fields of this structure MUST be stored using the specified
+ * byte order indicated below, as the structure is exchanged between nodes
+ * as part of a link setup process.
+ */
+
 struct tipc_media_addr {
-	__u32  type;
+	__u32  type;			/* bearer type (network byte order) */
 	union {
-		__u8   eth_addr[6];	/* Ethernet bearer */ 
+		__u8   eth_addr[6];	/* 48 bit Ethernet addr (byte array) */ 
 #if 0
 		/* Prototypes for other possible bearer types */
 
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index b646619..3ecb100 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -254,7 +254,9 @@ int tipc_eth_media_start(void)
 	if (eth_started)
 		return -EINVAL;
 
-	memset(&bcast_addr, 0xff, sizeof(bcast_addr));
+	bcast_addr.type = htonl(TIPC_MEDIA_TYPE_ETH);
+	memset(&bcast_addr.dev_addr, 0xff, ETH_ALEN);
+
 	memset(eth_bearers, 0, sizeof(eth_bearers));
 
 	res = tipc_register_media(TIPC_MEDIA_TYPE_ETH, "eth",
-- 
1.4.0

[PATCH 5/32] [TIPC] Allow ports to receive multicast messages through native API.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This fix prevents a kernel panic if an application mistakenly sends a
multicast message to  TIPC's topology service or configuration service.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/port.c |   26 ++++++++++++++++----------
 1 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/net/tipc/port.c b/net/tipc/port.c
index 67e96cb..360920b 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -810,18 +810,20 @@ static void port_dispatcher_sigh(void *d
 		void *usr_handle;
 		int connected;
 		int published;
+		u32 message_type;
 
 		struct sk_buff *next = buf->next;
 		struct tipc_msg *msg = buf_msg(buf);
 		u32 dref = msg_destport(msg);
 		
+		message_type = msg_type(msg);
+		if (message_type > TIPC_DIRECT_MSG)
+			goto reject;	/* Unsupported message type */
+
 		p_ptr = tipc_port_lock(dref);
-		if (!p_ptr) {
-			/* Port deleted while msg in queue */
-			tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
-			buf = next;
-			continue;
-		}
+		if (!p_ptr)
+			goto reject;	/* Port deleted while msg in queue */
+
 		orig.ref = msg_origport(msg);
 		orig.node = msg_orignode(msg);
 		up_ptr = p_ptr->user_port;
@@ -832,7 +834,7 @@ static void port_dispatcher_sigh(void *d
 		if (unlikely(msg_errcode(msg)))
 			goto err;
 
-		switch (msg_type(msg)) {
+		switch (message_type) {
 		
 		case TIPC_CONN_MSG:{
 				tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
@@ -874,6 +876,7 @@ static void port_dispatcher_sigh(void *d
 				   &orig);
 				break;
 			}
+		case TIPC_MCAST_MSG:
 		case TIPC_NAMED_MSG:{
 				tipc_named_msg_event cb = up_ptr->named_msg_cb;
 
@@ -886,7 +889,8 @@ static void port_dispatcher_sigh(void *d
 					goto reject;
 				dseq.type =  msg_nametype(msg);
 				dseq.lower = msg_nameinst(msg);
-				dseq.upper = dseq.lower;
+				dseq.upper = (message_type == TIPC_NAMED_MSG)
+					? dseq.lower : msg_nameupper(msg);
 				skb_pull(buf, msg_hdr_sz(msg));
 				cb(usr_handle, dref, &buf, msg_data(msg), 
 				   msg_data_sz(msg), msg_importance(msg),
@@ -899,7 +903,7 @@ static void port_dispatcher_sigh(void *d
 		buf = next;
 		continue;
 err:
-		switch (msg_type(msg)) {
+		switch (message_type) {
 		
 		case TIPC_CONN_MSG:{
 				tipc_conn_shutdown_event cb = 
@@ -931,6 +935,7 @@ err:
 				   msg_data_sz(msg), msg_errcode(msg), &orig);
 				break;
 			}
+		case TIPC_MCAST_MSG:
 		case TIPC_NAMED_MSG:{
 				tipc_named_msg_err_event cb = 
 					up_ptr->named_err_cb;
@@ -940,7 +945,8 @@ err:
 					break;
 				dseq.type =  msg_nametype(msg);
 				dseq.lower = msg_nameinst(msg);
-				dseq.upper = dseq.lower;
+				dseq.upper = (message_type == TIPC_NAMED_MSG)
+					? dseq.lower : msg_nameupper(msg);
 				skb_pull(buf, msg_hdr_sz(msg));
 				cb(usr_handle, dref, &buf, msg_data(msg), 
 				   msg_data_sz(msg), msg_errcode(msg), &dseq);
-- 
1.4.0

[PATCH 6/32] [TIPC] Links now validate destination node specified by incoming messages.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This fix prevents link flopping and name table inconsistency problems arising
when a node is assigned a different <Z.C.N> value than it used previously.
(Changing the <Z.C.N> value causes other nodes to have two link endpoints
sending to the same MAC address using two different destination <Z.C.N> values,
requiring the receiving node to filter out the unwanted messages.)

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/link.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/net/tipc/link.c b/net/tipc/link.c
index 784b24b..955b87d 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1720,6 +1720,11 @@ #endif
 			link_recv_non_seq(buf);
 			continue;
 		}
+		
+		if (unlikely(!msg_short(msg) &&
+			     (msg_destnode(msg) != tipc_own_addr)))
+			goto cont;
+		
 		n_ptr = tipc_node_find(msg_prevnode(msg));
 		if (unlikely(!n_ptr))
 			goto cont;
-- 
1.4.0

[PATCH 7/32] [TIPC] Multicast link failure now resets all links to "nacking" node.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This fix prevents node from crashing.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/bcast.c |   32 +++++++++++---
 net/tipc/link.c  |  124 +++++++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 128 insertions(+), 28 deletions(-)

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 2c4ecbe..00691b7 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -49,13 +49,19 @@ #include "bearer.h"
 #include "name_table.h"
 #include "bcast.h"
 
-
 #define MAX_PKT_DEFAULT_MCAST 1500	/* bcast link max packet size (fixed) */
 
 #define BCLINK_WIN_DEFAULT 20		/* bcast link window size (default) */
 
 #define BCLINK_LOG_BUF_SIZE 0
 
+/*
+ * Loss rate for incoming broadcast frames; used to test retransmission code.
+ * Set to N to cause every N'th frame to be discarded; 0 => don't discard any.
+ */
+ 
+#define TIPC_BCAST_LOSS_RATE 0
+
 /**
  * struct bcbearer_pair - a pair of bearers used by broadcast link
  * @primary: pointer to primary bearer
@@ -165,21 +171,18 @@ static int bclink_ack_allowed(u32 n)
  * @after: sequence number of last packet to *not* retransmit
  * @to: sequence number of last packet to retransmit
  * 
- * Called with 'node' locked, bc_lock unlocked
+ * Called with bc_lock locked
  */
 
 static void bclink_retransmit_pkt(u32 after, u32 to)
 {
 	struct sk_buff *buf;
 
-	spin_lock_bh(&bc_lock);
 	buf = bcl->first_out;
 	while (buf && less_eq(buf_seqno(buf), after)) {
 		buf = buf->next;                
 	}
-	if (buf != NULL)
-		tipc_link_retransmit(bcl, buf, mod(to - after));
-	spin_unlock_bh(&bc_lock);              
+	tipc_link_retransmit(bcl, buf, mod(to - after));
 }
 
 /** 
@@ -399,7 +402,10 @@ int tipc_bclink_send_msg(struct sk_buff 
  */
 
 void tipc_bclink_recv_pkt(struct sk_buff *buf)
-{        
+{
+#if (TIPC_BCAST_LOSS_RATE)
+	static int rx_count = 0;
+#endif
 	struct tipc_msg *msg = buf_msg(buf);
 	struct node* node = tipc_node_find(msg_prevnode(msg));
 	u32 next_in;
@@ -420,9 +426,13 @@ void tipc_bclink_recv_pkt(struct sk_buff
 			tipc_node_lock(node);
 			tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
 			tipc_node_unlock(node);
+			spin_lock_bh(&bc_lock);
 			bcl->stats.recv_nacks++;
+			bcl->owner->next = node;   /* remember requestor */
 			bclink_retransmit_pkt(msg_bcgap_after(msg),
 					      msg_bcgap_to(msg));
+			bcl->owner->next = NULL;
+			spin_unlock_bh(&bc_lock);              
 		} else {
 			tipc_bclink_peek_nack(msg_destnode(msg),
 					      msg_bcast_tag(msg),
@@ -433,6 +443,14 @@ void tipc_bclink_recv_pkt(struct sk_buff
 		return;
 	}
 
+#if (TIPC_BCAST_LOSS_RATE)
+	if (++rx_count == TIPC_BCAST_LOSS_RATE) {
+		rx_count = 0;
+		buf_discard(buf);
+		return;
+	}
+#endif
+
 	tipc_node_lock(node);
 receive:
 	deferred = node->bclink.deferred_head;
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 955b87d..ba7d3f1 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1604,40 +1604,121 @@ void tipc_link_push_queue(struct link *l
 		tipc_bearer_schedule(l_ptr->b_ptr, l_ptr);
 }
 
+static void link_reset_all(unsigned long addr)
+{
+	struct node *n_ptr;
+	char addr_string[16];
+	u32 i;
+
+	read_lock_bh(&tipc_net_lock);
+	n_ptr = tipc_node_find((u32)addr);
+	if (!n_ptr) {
+		read_unlock_bh(&tipc_net_lock);
+		return;	/* node no longer exists */
+	}
+
+	tipc_node_lock(n_ptr);
+
+	warn("Resetting all links to %s\n", 
+	     addr_string_fill(addr_string, n_ptr->addr));
+
+	for (i = 0; i < MAX_BEARERS; i++) {
+		if (n_ptr->links[i]) {
+			link_print(n_ptr->links[i], TIPC_OUTPUT, 
+				   "Resetting link\n");
+			tipc_link_reset(n_ptr->links[i]);
+		}
+	}
+
+	tipc_node_unlock(n_ptr);
+	read_unlock_bh(&tipc_net_lock);
+}
+
+static void link_retransmit_failure(struct link *l_ptr, struct sk_buff *buf)
+{
+	struct tipc_msg *msg = buf_msg(buf);
+
+	warn("Retransmission failure on link <%s>\n", l_ptr->name);
+	tipc_msg_print(TIPC_OUTPUT, msg, ">RETR-FAIL>");
+
+	if (l_ptr->addr) {
+
+		/* Handle failure on standard link */
+
+		link_print(l_ptr, TIPC_OUTPUT, "Resetting link\n");
+		tipc_link_reset(l_ptr);
+
+	} else {
+
+		/* Handle failure on broadcast link */
+
+		struct node *n_ptr;
+		char addr_string[16];
+
+		tipc_printf(TIPC_OUTPUT, "Msg seq number: %u,  ", msg_seqno(msg));
+		tipc_printf(TIPC_OUTPUT, "Outstanding acks: %u\n", (u32)TIPC_SKB_CB(buf)->handle);
+		
+		n_ptr = l_ptr->owner->next;
+		tipc_node_lock(n_ptr);
+
+		addr_string_fill(addr_string, n_ptr->addr);
+		tipc_printf(TIPC_OUTPUT, "Multicast link info for %s\n", addr_string);
+		tipc_printf(TIPC_OUTPUT, "Supported: %d,  ", n_ptr->bclink.supported);
+		tipc_printf(TIPC_OUTPUT, "Acked: %u\n", n_ptr->bclink.acked);
+		tipc_printf(TIPC_OUTPUT, "Last in: %u,  ", n_ptr->bclink.last_in);
+		tipc_printf(TIPC_OUTPUT, "Gap after: %u,  ", n_ptr->bclink.gap_after);
+		tipc_printf(TIPC_OUTPUT, "Gap to: %u\n", n_ptr->bclink.gap_to);
+		tipc_printf(TIPC_OUTPUT, "Nack sync: %u\n\n", n_ptr->bclink.nack_sync);
+
+		tipc_k_signal((Handler)link_reset_all, (unsigned long)n_ptr->addr);
+
+		tipc_node_unlock(n_ptr);
+
+		l_ptr->stale_count = 0;
+	}
+}
+
 void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf, 
 			  u32 retransmits)
 {
 	struct tipc_msg *msg;
 
+	if (!buf)
+		return;
+
+	msg = buf_msg(buf);
+	
 	dbg("Retransmitting %u in link %x\n", retransmits, l_ptr);
 
-	if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr) && buf && !skb_cloned(buf)) {
-		msg_dbg(buf_msg(buf), ">NO_RETR->BCONG>");
-		dbg_print_link(l_ptr, "   ");
-		l_ptr->retransm_queue_head = msg_seqno(buf_msg(buf));
-		l_ptr->retransm_queue_size = retransmits;
-		return;
+	if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) {
+		if (!skb_cloned(buf)) {
+			msg_dbg(msg, ">NO_RETR->BCONG>");
+			dbg_print_link(l_ptr, "   ");
+			l_ptr->retransm_queue_head = msg_seqno(msg);
+			l_ptr->retransm_queue_size = retransmits;
+			return;
+		} else {
+			/* Don't retransmit if driver already has the buffer */
+		}
+	} else {
+		/* Detect repeated retransmit failures on uncongested bearer */
+
+		if (l_ptr->last_retransmitted == msg_seqno(msg)) {
+			if (++l_ptr->stale_count > 100) {
+				link_retransmit_failure(l_ptr, buf);
+				return;
+			}
+		} else {
+			l_ptr->last_retransmitted = msg_seqno(msg);
+			l_ptr->stale_count = 1;
+		}
 	}
+
 	while (retransmits && (buf != l_ptr->next_out) && buf && !skb_cloned(buf)) {
 		msg = buf_msg(buf);
 		msg_set_ack(msg, mod(l_ptr->next_in_no - 1));
 		msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); 
 		if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) {
-                        /* Catch if retransmissions fail repeatedly: */
-                        if (l_ptr->last_retransmitted == msg_seqno(msg)) {
-                                if (++l_ptr->stale_count > 100) {
-                                        tipc_msg_print(TIPC_CONS, buf_msg(buf), ">RETR>");
-                                        info("...Retransmitted %u times\n",
-					     l_ptr->stale_count);
-                                        link_print(l_ptr, TIPC_CONS, "Resetting Link\n");
-                                        tipc_link_reset(l_ptr);
-                                        break;
-                                }
-                        } else {
-                                l_ptr->stale_count = 0;
-                        }
-                        l_ptr->last_retransmitted = msg_seqno(msg);
-
 			msg_dbg(buf_msg(buf), ">RETR>");
 			buf = buf->next;
 			retransmits--;
@@ -1650,6 +1731,7 @@ void tipc_link_retransmit(struct link *l
 			return;
 		}
 	}
+
 	l_ptr->retransm_queue_head = l_ptr->retransm_queue_size = 0;
 }
 
-- 
1.4.0

Re: [PATCH 7/32] [TIPC] Multicast link failure now resets all links to "nacking" node.

[James Morris]

On Thu, 22 Jun 2006, Per Liden wrote:

> +static void link_reset_all(unsigned long addr)
> +{
> +	struct node *n_ptr;
> +	char addr_string[16];
> +	u32 i;
> +
> +	read_lock_bh(&tipc_net_lock);
> +	n_ptr = tipc_node_find((u32)addr);
> +	if (!n_ptr) {
> +		read_unlock_bh(&tipc_net_lock);
> +		return;	/* node no longer exists */
> +	}
> +
> +	tipc_node_lock(n_ptr);

You already have bh's disabled here, and tipc_node_lock() also disables 
them.

Not sure if it's really worth worrying about but if so, you could perhaps 
implement tipc_node_lock_bh() and tipc_node_lock().



- James
-- 
James Morris
<jmorris@namei.org>

[PATCH 8/32] [TIPC] Allow compilation when CONFIG_TIPC_DEBUG is not set.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/core.h |   19 ++++++++++++++-----
 1 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/net/tipc/core.h b/net/tipc/core.h
index 1f2e8b2..d1edb7a 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -2,7 +2,7 @@
  * net/tipc/core.h: Include file for TIPC global declarations
  * 
  * Copyright (c) 2005-2006, Ericsson AB
- * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 2005-2006, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -111,10 +111,6 @@ #endif
 
 #else
 
-#ifndef DBG_OUTPUT
-#define DBG_OUTPUT NULL
-#endif
-
 /*
  * TIPC debug support not included:
  * - system messages are printed to system console
@@ -129,6 +125,19 @@ #define dbg(fmt, arg...) do {} while (0)
 #define msg_dbg(msg,txt) do {} while (0)
 #define dump(fmt,arg...) do {} while (0)
 
+
+/*	
+ * TIPC_OUTPUT is defined to be the system console, while DBG_OUTPUT is
+ * the null print buffer.  Thes ensures that any system or debug messages 
+ * that are generated without using the above macros are handled correctly.
+ */
+
+#undef  TIPC_OUTPUT
+#define TIPC_OUTPUT TIPC_CONS
+
+#undef  DBG_OUTPUT
+#define DBG_OUTPUT NULL
+
 #endif			  
 
 
-- 
1.4.0

[PATCH 9/32] [TIPC] Fix for NULL pointer dereference

[Per Liden]

From: Eric Sesterhenn <snakebyte@gmx.de>

This fixes a bug spotted by the coverity checker, bug id #366. If
(mod(seqno - prev) != 1) we set buf to NULL, dereference it in the for
case, and set it to whatever value happes to be at adress 0+next, if it
happens to be non-zero, we even stay in the loop. It seems that the author
intended to break there.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/bcast.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 00691b7..44645f5 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -349,8 +349,10 @@ static void tipc_bclink_peek_nack(u32 de
 		for (; buf; buf = buf->next) {
 			u32 seqno = buf_seqno(buf);
 
-			if (mod(seqno - prev) != 1)
+			if (mod(seqno - prev) != 1) {
 				buf = NULL;
+				break;
+			}
 			if (seqno == gap_after)
 				break;
 			prev = seqno;
-- 
1.4.0

[PATCH 10/32] [TIPC] Fixed privilege checking typo in dest_name_check().

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This patch originated by Stephane Ouellette <ouellettes@videotron.ca>.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 648a734..eaf4d69 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -426,7 +426,7 @@ static int dest_name_check(struct sockad
 
         if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr)))
 		return -EFAULT;
-	if ((ntohs(hdr.tcm_type) & 0xC000) & (!capable(CAP_NET_ADMIN)))
+	if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN)))
 		return -EACCES;
         
 	return 0;
-- 
1.4.0

[PATCH 11/32] [TIPC] Fix misleading comment in buf_discard() routine.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/core.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/tipc/core.h b/net/tipc/core.h
index d1edb7a..86f54f3 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -318,7 +318,7 @@ static inline struct sk_buff *buf_acquir
  * buf_discard - frees a TIPC message buffer
  * @skb: message buffer
  *
- * Frees a new buffer.  If passed NULL, just returns.
+ * Frees a message buffer.  If passed NULL, just returns.
  */
 
 static inline void buf_discard(struct sk_buff *skb)
-- 
1.4.0

[PATCH 12/32] [TIPC] Added support for MODULE_VERSION capability.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/core.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/tipc/core.c b/net/tipc/core.c
index 31c7dd5..5003acb 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -2,7 +2,7 @@
  * net/tipc/core.c: TIPC module code
  *
  * Copyright (c) 2003-2006, Ericsson AB
- * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 2005-2006, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,7 +57,7 @@ void tipc_socket_stop(void);
 int  tipc_netlink_start(void);
 void tipc_netlink_stop(void);
 
-#define MOD_NAME "tipc_start: "
+#define TIPC_MOD_VER "1.6.1"
 
 #ifndef CONFIG_TIPC_ZONES
 #define CONFIG_TIPC_ZONES 3
@@ -224,6 +224,7 @@ module_exit(tipc_exit);
 
 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
 MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(TIPC_MOD_VER);
 
 /* Native TIPC API for kernel-space applications (see tipc.h) */
 
-- 
1.4.0

[PATCH 13/32] [TIPC] Validate entire interface name when locating bearer to enable.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This fix prevents a bearer from being enabled using the wrong interface.
For example, specifying "eth:eth14" might enable "eth:eth1" by mistake.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/eth_media.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 3ecb100..682da4a 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -2,7 +2,7 @@
  * net/tipc/eth_media.c: Ethernet bearer support for TIPC
  * 
  * Copyright (c) 2001-2006, Ericsson AB
- * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 2005-2006, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -127,8 +127,7 @@ static int enable_bearer(struct tipc_bea
 
 	/* Find device with specified name */
 
-	while (dev && dev->name &&
-	       (memcmp(dev->name, driver_name, strlen(dev->name)))) {
+	while (dev && dev->name && strncmp(dev->name, driver_name, IFNAMSIZ)) {	
 		dev = dev->next;
 	}
 	if (!dev)
-- 
1.4.0

[PATCH 14/32] [TIPC] Non-operation-affecting corrections to comments & function definitions.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index eaf4d69..0923213 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -437,7 +437,7 @@ static int dest_name_check(struct sockad
  * @iocb: (unused)
  * @sock: socket structure
  * @m: message to send
- * @total_len: (unused)
+ * @total_len: length of message
  * 
  * Message must have an destination specified explicitly.
  * Used for SOCK_RDM and SOCK_DGRAM messages, 
@@ -538,7 +538,7 @@ exit:                                
  * @iocb: (unused)
  * @sock: socket structure
  * @m: message to send
- * @total_len: (unused)
+ * @total_len: length of message
  * 
  * Used for SOCK_SEQPACKET messages and SOCK_STREAM data.
  * 
@@ -1386,7 +1386,7 @@ exit:
 /**
  * shutdown - shutdown socket connection
  * @sock: socket structure
- * @how: direction to close (always treated as read + write)
+ * @how: direction to close (unused; always treated as read + write)
  *
  * Terminates connection (if necessary), then purges socket's receive queue.
  * 
@@ -1469,7 +1469,8 @@ restart:
  * Returns 0 on success, errno otherwise
  */
 
-static int setsockopt(struct socket *sock, int lvl, int opt, char *ov, int ol)
+static int setsockopt(struct socket *sock, 
+		      int lvl, int opt, char __user *ov, int ol)
 {
 	struct tipc_sock *tsock = tipc_sk(sock->sk);
 	u32 value;
@@ -1525,7 +1526,8 @@ static int setsockopt(struct socket *soc
  * Returns 0 on success, errno otherwise
  */
 
-static int getsockopt(struct socket *sock, int lvl, int opt, char *ov, int *ol)
+static int getsockopt(struct socket *sock, 
+		      int lvl, int opt, char __user *ov, int *ol)
 {
 	struct tipc_sock *tsock = tipc_sk(sock->sk);
         int len;
-- 
1.4.0

[PATCH 15/32] [TIPC] Fixed connect() to detect a dest address that is missing or too short.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 0923213..758b2d2 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1244,7 +1244,7 @@ static int connect(struct socket *sock, 
    if (sock->state != SS_UNCONNECTED)
            return -EISCONN;
 
-   if ((dst->family != AF_TIPC) ||
+   if ((destlen < sizeof(*dst)) || (dst->family != AF_TIPC) ||
        ((dst->addrtype != TIPC_ADDR_NAME) && (dst->addrtype != TIPC_ADDR_ID)))
            return -EINVAL;
 
-- 
1.4.0

[PATCH 16/32] [TIPC] Implied connect now saves dest name for retrieval as ancillary data.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 758b2d2..98550b9 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -470,6 +470,10 @@ static int send_msg(struct kiocb *iocb, 
 		if ((tsock->p->published) ||
 		    ((sock->type == SOCK_STREAM) && (total_len != 0)))
 			return -EOPNOTSUPP;
+		if (dest->addrtype == TIPC_ADDR_NAME) {
+			tsock->p->conn_type = dest->addr.name.name.type;
+			tsock->p->conn_instance = dest->addr.name.name.instance;
+		}
 	}
 
 	if (down_interruptible(&tsock->sem))
@@ -1269,10 +1273,6 @@ static int connect(struct socket *sock, 
 	   msg = buf_msg(buf);
            res = auto_connect(sock, tsock, msg);
            if (!res) {
-		   if (dst->addrtype == TIPC_ADDR_NAME) {
-			   tsock->p->conn_type = dst->addr.name.name.type;
-			   tsock->p->conn_instance = dst->addr.name.name.instance;
-		   }
 		   if (!msg_data_sz(msg))
 			   advance_queue(tsock);
 	   }
-- 
1.4.0

[PATCH 17/32] [TIPC] Can now return destination name of form {0,x,y} via ancillary data.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 98550b9..361dc34 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -731,6 +731,7 @@ static int anc_data_recv(struct msghdr *
 	u32 anc_data[3];
 	u32 err;
 	u32 dest_type;
+	int has_name;
 	int res;
 
 	if (likely(m->msg_controllen == 0))
@@ -755,24 +756,27 @@ static int anc_data_recv(struct msghdr *
 	dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
 	switch (dest_type) {
 	case TIPC_NAMED_MSG:
+		has_name = 1;
 		anc_data[0] = msg_nametype(msg);
 		anc_data[1] = msg_namelower(msg);
 		anc_data[2] = msg_namelower(msg);
 		break;
 	case TIPC_MCAST_MSG:
+		has_name = 1;
 		anc_data[0] = msg_nametype(msg);
 		anc_data[1] = msg_namelower(msg);
 		anc_data[2] = msg_nameupper(msg);
 		break;
 	case TIPC_CONN_MSG:
+		has_name = (tport->conn_type != 0);
 		anc_data[0] = tport->conn_type;
 		anc_data[1] = tport->conn_instance;
 		anc_data[2] = tport->conn_instance;
 		break;
 	default:
-		anc_data[0] = 0;
+		has_name = 0;
 	}
-	if (anc_data[0] &&
+	if (has_name &&
 	    (res = put_cmsg(m, SOL_SOCKET, TIPC_DESTNAME, 12, anc_data)))
 		return res;
 
-- 
1.4.0

[PATCH 18/32] [TIPC] Connected send now checks socket state when retrying congested send.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 361dc34..9c834fc 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -565,15 +565,15 @@ static int send_packet(struct kiocb *ioc
 		return -ERESTARTSYS;
         }
 
-        if (unlikely(sock->state != SS_CONNECTED)) {
-                if (sock->state == SS_DISCONNECTING)
-                        res = -EPIPE;   
-                else
-                        res = -ENOTCONN;
-                goto exit;
-        }
-
         do {
+		if (unlikely(sock->state != SS_CONNECTED)) {
+			if (sock->state == SS_DISCONNECTING)
+				res = -EPIPE;   
+			else
+				res = -ENOTCONN;
+			goto exit;
+		}
+
                 res = tipc_send(tsock->p->ref, m->msg_iovlen, m->msg_iov);
                 if (likely(res != -ELINKCONG)) {
 exit:
-- 
1.4.0

[PATCH 19/32] [TIPC] Stream socket send indicates partial success if data partially sent.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 9c834fc..8cefacb 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -601,7 +601,8 @@ exit:
  * 
  * Used for SOCK_STREAM data.
  * 
- * Returns the number of bytes sent on success, or errno otherwise
+ * Returns the number of bytes sent on success (or partial success), 
+ * or errno if no data sent
  */
 
 
@@ -615,6 +616,7 @@ static int send_stream(struct kiocb *ioc
 	char __user *curr_start;
 	int curr_left;
 	int bytes_to_send;
+	int bytes_sent;
 	int res;
 	
 	if (likely(total_len <= TIPC_MAX_USER_MSG_SIZE))
@@ -637,11 +639,11 @@ static int send_stream(struct kiocb *ioc
 	 * of small iovec entries into send_packet().
 	 */
 
-	my_msg = *m;
-	curr_iov = my_msg.msg_iov;
-	curr_iovlen = my_msg.msg_iovlen;
+	curr_iov = m->msg_iov;
+	curr_iovlen = m->msg_iovlen;
 	my_msg.msg_iov = &my_iov;
 	my_msg.msg_iovlen = 1;
+	bytes_sent = 0;
 
 	while (curr_iovlen--) {
 		curr_start = curr_iov->iov_base;
@@ -652,16 +654,18 @@ static int send_stream(struct kiocb *ioc
 				? curr_left : TIPC_MAX_USER_MSG_SIZE;
 			my_iov.iov_base = curr_start;
 			my_iov.iov_len = bytes_to_send;
-                        if ((res = send_packet(iocb, sock, &my_msg, 0)) < 0)
-                                return res;
+                        if ((res = send_packet(iocb, sock, &my_msg, 0)) < 0) {
+				return bytes_sent ? bytes_sent : res;
+			}
 			curr_left -= bytes_to_send;
 			curr_start += bytes_to_send;
+			bytes_sent += bytes_to_send;
 		}
 
 		curr_iov++;
 	}
 
-	return total_len;
+	return bytes_sent;
 }
 
 /**
-- 
1.4.0

[PATCH 20/32] [TIPC] Improved performance of error checking during socket creation.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 8cefacb..a1f2210 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -169,12 +169,6 @@ static int tipc_create(struct socket *so
 	struct sock *sk;
         u32 ref;
 
-	if ((sock->type != SOCK_STREAM) && 
-	    (sock->type != SOCK_SEQPACKET) &&
-	    (sock->type != SOCK_DGRAM) &&
-	    (sock->type != SOCK_RDM))
-		return -EPROTOTYPE;
-
 	if (unlikely(protocol != 0))
 		return -EPROTONOSUPPORT;
 
@@ -199,6 +193,9 @@ static int tipc_create(struct socket *so
 		sock->ops = &msg_ops;
 		sock->state = SS_READY;
 		break;
+	default:
+		tipc_deleteport(ref);
+		return -EPROTOTYPE;
 	}
 
 	sk = sk_alloc(AF_TIPC, GFP_KERNEL, &tipc_proto, 1);
-- 
1.4.0

[PATCH 21/32] [TIPC] recvmsg() now returns TIPC ancillary data using correct level (SOL_TIPC)

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index a1f2210..abecf2d 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -744,10 +744,10 @@ static int anc_data_recv(struct msghdr *
 	if (unlikely(err)) {
 		anc_data[0] = err;
 		anc_data[1] = msg_data_sz(msg);
-		if ((res = put_cmsg(m, SOL_SOCKET, TIPC_ERRINFO, 8, anc_data)))
+		if ((res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data)))
 			return res;
 		if (anc_data[1] &&
-		    (res = put_cmsg(m, SOL_SOCKET, TIPC_RETDATA, anc_data[1], 
+		    (res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], 
 				    msg_data(msg))))
 			return res;
 	}
@@ -778,7 +778,7 @@ static int anc_data_recv(struct msghdr *
 		has_name = 0;
 	}
 	if (has_name &&
-	    (res = put_cmsg(m, SOL_SOCKET, TIPC_DESTNAME, 12, anc_data)))
+	    (res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data)))
 		return res;
 
 	return 0;
-- 
1.4.0

[PATCH 22/32] [TIPC] Simplify code for returning partial success of stream send request.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index abecf2d..6d4d2b0 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -969,7 +969,7 @@ static int recv_stream(struct kiocb *ioc
 restart:
 	if (unlikely((skb_queue_len(&sock->sk->sk_receive_queue) == 0) &&
 		     (flags & MSG_DONTWAIT))) {
-		res = (sz_copied == 0) ? -EWOULDBLOCK : 0;
+		res = -EWOULDBLOCK;
 		goto exit;
 	}
 
@@ -1060,7 +1060,7 @@ restart:
 
 exit:
 	up(&tsock->sem);
-	return res ? res : sz_copied;
+	return sz_copied ? sz_copied : res;
 }
 
 /**
-- 
1.4.0

[PATCH 23/32] [TIPC] Optimized argument validation done by connect().

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/socket.c |   17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 6d4d2b0..32d7784 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -455,7 +455,8 @@ static int send_msg(struct kiocb *iocb, 
 
 	if (unlikely(!dest))
 		return -EDESTADDRREQ;
-	if (unlikely(dest->family != AF_TIPC))
+	if (unlikely((m->msg_namelen < sizeof(*dest)) ||
+		     (dest->family != AF_TIPC)))
 		return -EINVAL;
 
 	needs_conn = (sock->state != SS_READY);
@@ -1245,7 +1246,8 @@ static int connect(struct socket *sock, 
    if (sock->state == SS_READY)
 	   return -EOPNOTSUPP;
 
-   /* MOVE THE REST OF THIS ERROR CHECKING TO send_msg()? */
+   /* Issue Posix-compliant error code if socket is in the wrong state */
+
    if (sock->state == SS_LISTENING)
 	   return -EOPNOTSUPP;
    if (sock->state == SS_CONNECTING)
@@ -1253,13 +1255,20 @@ static int connect(struct socket *sock, 
    if (sock->state != SS_UNCONNECTED)
            return -EISCONN;
 
-   if ((destlen < sizeof(*dst)) || (dst->family != AF_TIPC) ||
-       ((dst->addrtype != TIPC_ADDR_NAME) && (dst->addrtype != TIPC_ADDR_ID)))
+   /*
+    * Reject connection attempt using multicast address
+    *
+    * Note: send_msg() validates the rest of the address fields,
+    *       so there's no need to do it here
+    */
+
+   if (dst->addrtype == TIPC_ADDR_MCAST)
            return -EINVAL;
 
    /* Send a 'SYN-' to destination */
 
    m.msg_name = dest;
+   m.msg_namelen = destlen;
    if ((res = send_msg(NULL, sock, &m, 0)) < 0) {
 	   sock->state = SS_DISCONNECTING;
 	   return res;
-- 
1.4.0

[PATCH 24/32] [TIPC] Withdrawing all names from nameless port now returns success, not error

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/port.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/net/tipc/port.c b/net/tipc/port.c
index 360920b..899e08e 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -1171,8 +1171,6 @@ int tipc_withdraw(u32 ref, unsigned int 
 	p_ptr = tipc_port_lock(ref);
 	if (!p_ptr)
 		return -EINVAL;
-	if (!p_ptr->publ.published)
-		goto exit;
 	if (!seq) {
 		list_for_each_entry_safe(publ, tpubl, 
 					 &p_ptr->publications, pport_list) {
@@ -1199,7 +1197,6 @@ int tipc_withdraw(u32 ref, unsigned int 
 	}
 	if (list_empty(&p_ptr->publications))
 		p_ptr->publ.published = 0;
-exit:
 	tipc_port_unlock(p_ptr);
 	return res;
 }
-- 
1.4.0

[PATCH 25/32] [TIPC] Added missing warning for out-of-memory condition

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/port.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/tipc/port.c b/net/tipc/port.c
index 899e08e..99846a1 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -1061,6 +1061,7 @@ int tipc_createport(u32 user_ref, 
 
 	up_ptr = (struct user_port *)kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
 	if (up_ptr == NULL) {
+		warn("Port creation failed, no memory\n");
 		return -ENOMEM;
 	}
 	ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
-- 
1.4.0

[PATCH 26/32] [TIPC] Fixed memory leak in tipc_link_send() when destination is unreachable

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/link.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/net/tipc/link.c b/net/tipc/link.c
index ba7d3f1..ff40c91 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1135,9 +1135,13 @@ int tipc_link_send(struct sk_buff *buf, 
 	if (n_ptr) {
 		tipc_node_lock(n_ptr);
 		l_ptr = n_ptr->active_links[selector & 1];
-		dbg("tipc_link_send: found link %x for dest %x\n", l_ptr, dest);
 		if (l_ptr) {
+			dbg("tipc_link_send: found link %x for dest %x\n", l_ptr, dest);
 			res = tipc_link_send_buf(l_ptr, buf);
+		} else {
+			dbg("Attempt to send msg to unreachable node:\n");
+			msg_dbg(buf_msg(buf),">>>");
+			buf_discard(buf);
 		}
 		tipc_node_unlock(n_ptr);
 	} else {
-- 
1.4.0

[PATCH 27/32] [TIPC] Disallow config operations that aren't supported in certain modes.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This change provides user-friendly feedback when TIPC is unable to perform
certain configuration operations that don't work properly in certain modes.
(In particular, any reconfiguration request that would temporarily take TIPC
from network mode to standalone mode, or from standalone mode to not running
mode, is disallowed.)

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/config.c |   83 ++++++++++++++++++++++++-----------------------------
 1 files changed, 38 insertions(+), 45 deletions(-)

diff --git a/net/tipc/config.c b/net/tipc/config.c
index 48b5de2..41c8447 100644
--- a/net/tipc/config.c
+++ b/net/tipc/config.c
@@ -291,13 +291,22 @@ static struct sk_buff *cfg_set_own_addr(
 	if (!tipc_addr_node_valid(addr))
 		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 						   " (node address)");
-	if (tipc_own_addr)
+	if (tipc_mode == TIPC_NET_MODE)
 		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 						   " (cannot change node address once assigned)");
+	tipc_own_addr = addr;
+
+	/* 
+	 * Must release all spinlocks before calling start_net() because
+	 * Linux version of TIPC calls eth_media_start() which calls
+	 * register_netdevice_notifier() which may block!
+	 *
+	 * Temporarily releasing the lock should be harmless for non-Linux TIPC,
+	 * but Linux version of eth_media_start() should really be reworked
+	 * so that it can be called with spinlocks held.
+	 */
 
 	spin_unlock_bh(&config_lock);
-	tipc_core_stop_net();
-	tipc_own_addr = addr;
 	tipc_core_start_net();
 	spin_lock_bh(&config_lock);
 	return tipc_cfg_reply_none();
@@ -350,50 +359,21 @@ static struct sk_buff *cfg_set_max_subsc
 
 static struct sk_buff *cfg_set_max_ports(void)
 {
-	int orig_mode;
 	u32 value;
 
 	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 	value = *(u32 *)TLV_DATA(req_tlv_area);
 	value = ntohl(value);
+	if (value == tipc_max_ports)
+		return tipc_cfg_reply_none();
 	if (value != delimit(value, 127, 65535))
 		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 						   " (max ports must be 127-65535)");
-
-	if (value == tipc_max_ports)
-		return tipc_cfg_reply_none();
-
-	if (atomic_read(&tipc_user_count) > 2)
+	if (tipc_mode != TIPC_NOT_RUNNING)
 		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
-						   " (cannot change max ports while TIPC users exist)");
-
-	spin_unlock_bh(&config_lock);
-	orig_mode = tipc_get_mode();
-	if (orig_mode == TIPC_NET_MODE)
-		tipc_core_stop_net();
-	tipc_core_stop();
+			" (cannot change max ports while TIPC is active)");
 	tipc_max_ports = value;
-	tipc_core_start();
-	if (orig_mode == TIPC_NET_MODE)
-		tipc_core_start_net();
-	spin_lock_bh(&config_lock);
-	return tipc_cfg_reply_none();
-}
-
-static struct sk_buff *set_net_max(int value, int *parameter)
-{
-	int orig_mode;
-
-	if (value != *parameter) {
-		orig_mode = tipc_get_mode();
-		if (orig_mode == TIPC_NET_MODE)
-			tipc_core_stop_net();
-		*parameter = value;
-		if (orig_mode == TIPC_NET_MODE)
-			tipc_core_start_net();
-	}
-
 	return tipc_cfg_reply_none();
 }
 
@@ -405,10 +385,16 @@ static struct sk_buff *cfg_set_max_zones
 		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 	value = *(u32 *)TLV_DATA(req_tlv_area);
 	value = ntohl(value);
+	if (value == tipc_max_zones)
+		return tipc_cfg_reply_none();
 	if (value != delimit(value, 1, 255))
 		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 						   " (max zones must be 1-255)");
-	return set_net_max(value, &tipc_max_zones);
+	if (tipc_mode == TIPC_NET_MODE)
+		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
+			" (cannot change max zones once TIPC has joined a network)");
+	tipc_max_zones = value;
+	return tipc_cfg_reply_none();
 }
 
 static struct sk_buff *cfg_set_max_clusters(void)
@@ -419,8 +405,8 @@ static struct sk_buff *cfg_set_max_clust
 		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 	value = *(u32 *)TLV_DATA(req_tlv_area);
 	value = ntohl(value);
-	if (value != 1)
-		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
+	if (value != delimit(value, 1, 1))
+		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 						   " (max clusters fixed at 1)");
 	return tipc_cfg_reply_none();
 }
@@ -433,10 +419,16 @@ static struct sk_buff *cfg_set_max_nodes
 		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 	value = *(u32 *)TLV_DATA(req_tlv_area);
 	value = ntohl(value);
+	if (value == tipc_max_nodes)
+		return tipc_cfg_reply_none();
 	if (value != delimit(value, 8, 2047))
 		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 						   " (max nodes must be 8-2047)");
-	return set_net_max(value, &tipc_max_nodes);
+	if (tipc_mode == TIPC_NET_MODE)
+		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
+			" (cannot change max nodes once TIPC has joined a network)");
+	tipc_max_nodes = value;
+	return tipc_cfg_reply_none();
 }
 
 static struct sk_buff *cfg_set_max_slaves(void)
@@ -461,15 +453,16 @@ static struct sk_buff *cfg_set_netid(voi
 		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 	value = *(u32 *)TLV_DATA(req_tlv_area);
 	value = ntohl(value);
+	if (value == tipc_net_id)
+		return tipc_cfg_reply_none();
 	if (value != delimit(value, 1, 9999))
 		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 						   " (network id must be 1-9999)");
-
-	if (tipc_own_addr)
+	if (tipc_mode == TIPC_NET_MODE)
 		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
-						   " (cannot change network id once part of network)");
-	
-	return set_net_max(value, &tipc_net_id);
+			" (cannot change network id once TIPC has joined a network)");
+	tipc_net_id = value;
+	return tipc_cfg_reply_none();
 }
 
 struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
-- 
1.4.0

[PATCH 28/32] [TIPC] First phase of assert() cleanup

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This also contains enhancements to simplify comparisons in name table
publication removal algorithm and to simplify name table sanity checking
when shutting down TIPC.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/link.c        |   13 ++-
 net/tipc/name_distr.c  |   20 +++++
 net/tipc/name_table.c  |  179 +++++++++++++++++++++++++-----------------------
 net/tipc/node.c        |    3 -
 net/tipc/node_subscr.c |   15 ++--
 net/tipc/port.c        |    1 
 net/tipc/ref.c         |   31 +++++++-
 7 files changed, 153 insertions(+), 109 deletions(-)

diff --git a/net/tipc/link.c b/net/tipc/link.c
index ff40c91..2efced5 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -574,7 +574,6 @@ void tipc_link_wakeup_ports(struct link 
 			break;
 		list_del_init(&p_ptr->wait_list);
 		p_ptr->congested_link = NULL;
-		assert(p_ptr->wakeup);
 		spin_lock_bh(p_ptr->publ.lock);
 		p_ptr->publ.congested = 0;
 		p_ptr->wakeup(&p_ptr->publ);
@@ -1246,8 +1245,6 @@ int tipc_link_send_sections_fast(struct 
 	int res;
 	u32 selector = msg_origport(hdr) & 1;
 
-	assert(destaddr != tipc_own_addr);
-
 again:
 	/*
 	 * Try building message using port's max_pkt hint.
@@ -2310,7 +2307,6 @@ void tipc_link_tunnel(struct link *l_ptr
 	memcpy(buf->data + INT_H_SIZE, (unchar *)msg, length);
 	dbg("%c->%c:", l_ptr->b_ptr->net_plane, tunnel->b_ptr->net_plane);
 	msg_dbg(buf_msg(buf), ">SEND>");
-	assert(tunnel);
 	tipc_link_send_buf(tunnel, buf);
 }
 
@@ -2339,10 +2335,10 @@ void tipc_link_changeover(struct link *l
 		 ORIGINAL_MSG, TIPC_OK, INT_H_SIZE, l_ptr->addr);
 	msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id);
 	msg_set_msgcnt(&tunnel_hdr, msgcount);
+
 	if (!l_ptr->first_out) {
 		struct sk_buff *buf;
 
-		assert(!msgcount);
 		buf = buf_acquire(INT_H_SIZE);
 		if (buf) {
 			memcpy(buf->data, (unchar *)&tunnel_hdr, INT_H_SIZE);
@@ -2356,6 +2352,7 @@ void tipc_link_changeover(struct link *l
 		}
 		return;
 	}
+
 	while (crs) {
 		struct tipc_msg *msg = buf_msg(crs);
 
@@ -2455,11 +2452,15 @@ static int link_recv_changeover_msg(stru
 	u32 msg_count = msg_msgcnt(tunnel_msg);
 
 	dest_link = (*l_ptr)->owner->links[msg_bearer_id(tunnel_msg)];
-	assert(dest_link != *l_ptr);
 	if (!dest_link) {
 		msg_dbg(tunnel_msg, "NOLINK/<REC<");
 		goto exit;
 	}
+	if (dest_link == *l_ptr) {
+		err("Unexpected changeover message on link <%s>\n", 
+		    (*l_ptr)->name);
+		goto exit;
+	}
 	dbg("%c<-%c:", dest_link->b_ptr->net_plane,
 	    (*l_ptr)->b_ptr->net_plane);
 	*l_ptr = dest_link;
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index a3bbc89..5718ecb 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -174,7 +174,6 @@ void tipc_named_node_up(unsigned long no
 	u32 rest;
 	u32 max_item_buf;
 
-	assert(in_own_cluster(node));
 	read_lock_bh(&tipc_nametbl_lock); 
 	max_item_buf = TIPC_MAX_USER_MSG_SIZE / ITEM_SIZE;
 	max_item_buf *= ITEM_SIZE;
@@ -221,15 +220,24 @@ exit:
 static void node_is_down(struct publication *publ)
 {
 	struct publication *p;
+
         write_lock_bh(&tipc_nametbl_lock);
 	dbg("node_is_down: withdrawing %u, %u, %u\n", 
 	    publ->type, publ->lower, publ->upper);
         publ->key += 1222345;
 	p = tipc_nametbl_remove_publ(publ->type, publ->lower, 
 				     publ->node, publ->ref, publ->key);
-        assert(p == publ);
 	write_unlock_bh(&tipc_nametbl_lock);
-	kfree(publ);
+
+        if (p != publ) {
+		err("Unable to remove publication from failed node\n"
+		    "(type=%u, lower=%u, node=0x%x, ref=%u, key=%u)\n",
+		    publ->type, publ->lower, publ->node, publ->ref, publ->key);
+	}
+
+	if (p) {
+		kfree(p);
+	}
 }
 
 /**
@@ -275,6 +283,12 @@ void tipc_named_recv(struct sk_buff *buf
 			if (publ) {
 				tipc_nodesub_unsubscribe(&publ->subscr);
         			kfree(publ);
+			} else {
+				err("Unable to remove publication by node 0x%x\n"
+				    "(type=%u, lower=%u, ref=%u, key=%u)\n",
+				    msg_orignode(msg),
+				    ntohl(item->type), ntohl(item->lower),
+				    ntohl(item->ref), ntohl(item->key));
 			}
 		} else {
 			warn("tipc_named_recv: unknown msg\n");
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 0511436..e90dc80 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -71,7 +71,7 @@ struct sub_seq {
  * @sseq: pointer to dynamically-sized array of sub-sequences of this 'type';
  *        sub-sequences are sorted in ascending order
  * @alloc: number of sub-sequences currently in array
- * @first_free: upper bound of highest sub-sequence + 1
+ * @first_free: array index of first unused sub-sequence entry
  * @ns_list: links to adjacent name sequences in hash chain
  * @subscriptions: list of subscriptions for this 'type'
  * @lock: spinlock controlling access to name sequence structure
@@ -175,7 +175,7 @@ static struct name_seq *tipc_nameseq_cre
 	nseq->lock = SPIN_LOCK_UNLOCKED;
 	nseq->type = type;
 	nseq->sseqs = sseq;
-	dbg("tipc_nameseq_create() nseq = %x type %u, ssseqs %x, ff: %u\n",
+	dbg("tipc_nameseq_create(): nseq = %p, type %u, ssseqs %p, ff: %u\n",
 	    nseq, type, nseq->sseqs, nseq->first_free);
 	nseq->alloc = 1;
 	INIT_HLIST_NODE(&nseq->ns_list);
@@ -253,16 +253,16 @@ static struct publication *tipc_nameseq_
 	struct sub_seq *sseq;
 	int created_subseq = 0;
 
-	assert(nseq->first_free <= nseq->alloc);
 	sseq = nameseq_find_subseq(nseq, lower);
-	dbg("nameseq_ins: for seq %x,<%u,%u>, found sseq %x\n",
+	dbg("nameseq_ins: for seq %p, {%u,%u}, found sseq %p\n",
 	    nseq, type, lower, sseq);
 	if (sseq) {
 
 		/* Lower end overlaps existing entry => need an exact match */
 
 		if ((sseq->lower != lower) || (sseq->upper != upper)) {
-			warn("Overlapping publ <%u,%u,%u>\n", type, lower, upper);
+			warn("Cannot publish {%u,%u,%u}, overlap error\n",
+			     type, lower, upper);
 			return NULL;
 		}
 	} else {
@@ -277,7 +277,8 @@ static struct publication *tipc_nameseq_
 
 		if ((inspos < nseq->first_free) &&
 		    (upper >= nseq->sseqs[inspos].lower)) {
-			warn("Overlapping publ <%u,%u,%u>\n", type, lower, upper);
+			warn("Cannot publish {%u,%u,%u}, overlap error\n",
+			     type, lower, upper);
 			return NULL;
 		}
 
@@ -287,7 +288,8 @@ static struct publication *tipc_nameseq_
 			struct sub_seq *sseqs = tipc_subseq_alloc(nseq->alloc * 2);
 
 			if (!sseqs) {
-				warn("Memory squeeze; failed to create sub-sequence\n");
+				warn("Cannot publish {%u,%u,%u}, no memory\n",
+				     type, lower, upper);
 				return NULL;
 			}
 			dbg("Allocated %u more sseqs\n", nseq->alloc);
@@ -311,7 +313,7 @@ static struct publication *tipc_nameseq_
 		sseq->upper = upper;
 		created_subseq = 1;
 	}
-	dbg("inserting (%u %u %u) from %x:%u into sseq %x(%u,%u) of seq %x\n",
+	dbg("inserting {%u,%u,%u} from <0x%x:%u> into sseq %p(%u,%u) of seq %p\n",
 	    type, lower, upper, node, port, sseq,
 	    sseq->lower, sseq->upper, nseq);
 
@@ -320,7 +322,7 @@ static struct publication *tipc_nameseq_
 	publ = publ_create(type, lower, upper, scope, node, port, key);
 	if (!publ)
 		return NULL;
-	dbg("inserting publ %x, node=%x publ->node=%x, subscr->node=%x\n",
+	dbg("inserting publ %p, node=0x%x publ->node=0x%x, subscr->node=%p\n",
 	    publ, node, publ->node, publ->subscr.node);
 
 	if (!sseq->zone_list)
@@ -367,45 +369,47 @@ static struct publication *tipc_nameseq_
 
 /**
  * tipc_nameseq_remove_publ -
+ * 
+ * NOTE: There may be cases where TIPC is asked to remove a publication
+ * that is not in the name table.  For example, if another node issues a
+ * publication for a name sequence that overlaps an existing name sequence
+ * the publication will not be recorded, which means the publication won't
+ * be found when the name sequence is later withdrawn by that node.
+ * A failed withdraw request simply returns a failure indication and lets the
+ * caller issue any error or warning messages associated with such a problem.
  */
 
 static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
 						    u32 node, u32 ref, u32 key)
 {
 	struct publication *publ;
+	struct publication *curr;
 	struct publication *prev;
 	struct sub_seq *sseq = nameseq_find_subseq(nseq, inst);
 	struct sub_seq *free;
 	struct subscription *s, *st;
 	int removed_subseq = 0;
 
-	assert(nseq);
-
-	if (!sseq) {
-		int i;
-
-		warn("Withdraw unknown <%u,%u>?\n", nseq->type, inst);
-		assert(nseq->sseqs);
-		dbg("Dumping subseqs %x for %x, alloc = %u,ff=%u\n",
-		    nseq->sseqs, nseq, nseq->alloc, 
-		    nseq->first_free);
-		for (i = 0; i < nseq->first_free; i++) {
-			dbg("Subseq %u(%x): lower = %u,upper = %u\n",
-			    i, &nseq->sseqs[i], nseq->sseqs[i].lower,
-			    nseq->sseqs[i].upper);
-		}
+	if (!sseq)
 		return NULL;
-	}
-	dbg("nameseq_remove: seq: %x, sseq %x, <%u,%u> key %u\n",
+
+	dbg("tipc_nameseq_remove_publ: seq: %p, sseq %p, {%u,%u}, key %u\n",
 	    nseq, sseq, nseq->type, inst, key);
 
+	/* Remove publication from zone scope list */
+
 	prev = sseq->zone_list;
 	publ = sseq->zone_list->zone_list_next;
 	while ((publ->key != key) || (publ->ref != ref) || 
 	       (publ->node && (publ->node != node))) {
 		prev = publ;
 		publ = publ->zone_list_next;
-		assert(prev != sseq->zone_list);
+		if (prev == sseq->zone_list) {
+			
+			/* Prevent endless loop if publication not found */
+
+			return NULL;
+		}
 	}
 	if (publ != sseq->zone_list)
 		prev->zone_list_next = publ->zone_list_next;
@@ -416,14 +420,24 @@ static struct publication *tipc_nameseq_
 		sseq->zone_list = NULL;
 	}
 
+	/* Remove publication from cluster scope list, if present */
+
 	if (in_own_cluster(node)) {
 		prev = sseq->cluster_list;
-		publ = sseq->cluster_list->cluster_list_next;
-		while ((publ->key != key) || (publ->ref != ref) || 
-		       (publ->node && (publ->node != node))) {
-			prev = publ;
-			publ = publ->cluster_list_next;
-			assert(prev != sseq->cluster_list);
+		curr = sseq->cluster_list->cluster_list_next;
+		while (curr != publ) {
+			prev = curr;
+			curr = curr->cluster_list_next;
+			if (prev == sseq->cluster_list) {
+
+				/* Prevent endless loop for malformed list */
+
+				err("Unable to de-list cluster publication\n"
+				    "{%u%u}, node=0x%x, ref=%u, key=%u)\n",
+				    publ->type, publ->lower, publ->node, 
+				    publ->ref, publ->key);
+				goto end_cluster;
+			}
 		}
 		if (publ != sseq->cluster_list)
 			prev->cluster_list_next = publ->cluster_list_next;
@@ -434,15 +448,26 @@ static struct publication *tipc_nameseq_
 			sseq->cluster_list = NULL;
 		}
 	}
+end_cluster:
+
+	/* Remove publication from node scope list, if present */
 
 	if (node == tipc_own_addr) {
 		prev = sseq->node_list;
-		publ = sseq->node_list->node_list_next;
-		while ((publ->key != key) || (publ->ref != ref) || 
-		       (publ->node && (publ->node != node))) {
-			prev = publ;
-			publ = publ->node_list_next;
-			assert(prev != sseq->node_list);
+		curr = sseq->node_list->node_list_next;
+		while (curr != publ) {
+			prev = curr;
+			curr = curr->node_list_next;
+			if (prev == sseq->node_list) {
+
+				/* Prevent endless loop for malformed list */
+
+				err("Unable to de-list node publication\n"
+				    "{%u%u}, node=0x%x, ref=%u, key=%u)\n",
+				    publ->type, publ->lower, publ->node, 
+				    publ->ref, publ->key);
+				goto end_node;
+			}
 		}
 		if (publ != sseq->node_list)
 			prev->node_list_next = publ->node_list_next;
@@ -453,22 +478,18 @@ static struct publication *tipc_nameseq_
 			sseq->node_list = NULL;
 		}
 	}
-	assert(!publ->node || (publ->node == node));
-	assert(publ->ref == ref);
-	assert(publ->key == key);
+end_node:
 
-	/* 
-	 * Contract subseq list if no more publications:
-	 */
-	if (!sseq->node_list && !sseq->cluster_list && !sseq->zone_list) {
+	/* Contract subseq list if no more publications for that subseq */
+
+	if (!sseq->zone_list) {
 		free = &nseq->sseqs[nseq->first_free--];
 		memmove(sseq, sseq + 1, (free - (sseq + 1)) * sizeof (*sseq));
 		removed_subseq = 1;
 	}
 
-	/* 
-	 * Any subscriptions waiting ? 
-	 */
+	/* Notify any waiting subscriptions */
+
 	list_for_each_entry_safe(s, st, &nseq->subscriptions, nameseq_list) {
 		tipc_subscr_report_overlap(s,
 					   publ->lower,
@@ -478,6 +499,7 @@ static struct publication *tipc_nameseq_
 					   publ->node,
 					   removed_subseq);
 	}
+
 	return publ;
 }
 
@@ -530,7 +552,7 @@ static struct name_seq *nametbl_find_seq
 	seq_head = &table.types[hash(type)];
 	hlist_for_each_entry(ns, seq_node, seq_head, ns_list) {
 		if (ns->type == type) {
-			dbg("found %x\n", ns);
+			dbg("found %p\n", ns);
 			return ns;
 		}
 	}
@@ -543,22 +565,21 @@ struct publication *tipc_nametbl_insert_
 {
 	struct name_seq *seq = nametbl_find_seq(type);
 
-	dbg("ins_publ: <%u,%x,%x> found %x\n", type, lower, upper, seq);
+	dbg("tipc_nametbl_insert_publ: {%u,%u,%u} found %p\n", type, lower, upper, seq);
 	if (lower > upper) {
-		warn("Failed to publish illegal <%u,%u,%u>\n",
+		warn("Failed to publish illegal {%u,%u,%u}\n",
 		     type, lower, upper);
 		return NULL;
 	}
 
-	dbg("Publishing <%u,%u,%u> from %x\n", type, lower, upper, node);
+	dbg("Publishing {%u,%u,%u} from 0x%x\n", type, lower, upper, node);
 	if (!seq) {
 		seq = tipc_nameseq_create(type, &table.types[hash(type)]);
-		dbg("tipc_nametbl_insert_publ: created %x\n", seq);
+		dbg("tipc_nametbl_insert_publ: created %p\n", seq);
 	}
 	if (!seq)
 		return NULL;
 
-	assert(seq->type == type);
 	return tipc_nameseq_insert_publ(seq, type, lower, upper,
 					scope, node, port, key);
 }
@@ -572,7 +593,7 @@ struct publication *tipc_nametbl_remove_
 	if (!seq)
 		return NULL;
 
-	dbg("Withdrawing <%u,%u> from %x\n", type, lower, node);
+	dbg("Withdrawing {%u,%u} from 0x%x\n", type, lower, node);
 	publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
 
 	if (!seq->first_free && list_empty(&seq->subscriptions)) {
@@ -743,7 +764,7 @@ struct publication *tipc_nametbl_publish
 		return NULL;
 	}
 	if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {
-		warn("Failed to publish reserved name <%u,%u,%u>\n",
+		warn("Publication failed, reserved name {%u,%u,%u}\n",
 		     type, lower, upper);
 		return NULL;
 	}
@@ -767,10 +788,10 @@ int tipc_nametbl_withdraw(u32 type, u32 
 {
 	struct publication *publ;
 
-	dbg("tipc_nametbl_withdraw:<%d,%d,%d>\n", type, lower, key);
+	dbg("tipc_nametbl_withdraw: {%u,%u}, key=%u\n", type, lower, key);
 	write_lock_bh(&tipc_nametbl_lock);
 	publ = tipc_nametbl_remove_publ(type, lower, tipc_own_addr, ref, key);
-	if (publ) {
+	if (likely(publ)) {
 		table.local_publ_count--;
 		if (publ->scope != TIPC_NODE_SCOPE)
 			tipc_named_withdraw(publ);
@@ -780,6 +801,9 @@ int tipc_nametbl_withdraw(u32 type, u32 
 		return 1;
 	}
 	write_unlock_bh(&tipc_nametbl_lock);
+	err("Unable to remove local publication\n"
+	    "(type=%u, lower=%u, ref=%u, key=%u)\n",
+	    type, lower, ref, key);
 	return 0;
 }
 
@@ -787,8 +811,7 @@ int tipc_nametbl_withdraw(u32 type, u32 
  * tipc_nametbl_subscribe - add a subscription object to the name table
  */
 
-void
-tipc_nametbl_subscribe(struct subscription *s)
+void tipc_nametbl_subscribe(struct subscription *s)
 {
 	u32 type = s->seq.type;
 	struct name_seq *seq;
@@ -800,11 +823,13 @@ tipc_nametbl_subscribe(struct subscripti
 	}
         if (seq){
                 spin_lock_bh(&seq->lock);
-                dbg("tipc_nametbl_subscribe:found %x for <%u,%u,%u>\n",
+                dbg("tipc_nametbl_subscribe:found %p for {%u,%u,%u}\n",
                     seq, type, s->seq.lower, s->seq.upper);
-                assert(seq->type == type);
                 tipc_nameseq_subscribe(seq, s);
                 spin_unlock_bh(&seq->lock);
+        } else {
+		warn("Failed to create subscription for {%u,%u,%u}\n",
+		     s->seq.type, s->seq.lower, s->seq.upper);
         }
         write_unlock_bh(&tipc_nametbl_lock);
 }
@@ -813,8 +838,7 @@ tipc_nametbl_subscribe(struct subscripti
  * tipc_nametbl_unsubscribe - remove a subscription object from name table
  */
 
-void
-tipc_nametbl_unsubscribe(struct subscription *s)
+void tipc_nametbl_unsubscribe(struct subscription *s)
 {
 	struct name_seq *seq;
 
@@ -1049,35 +1073,20 @@ int tipc_nametbl_init(void)
 
 void tipc_nametbl_stop(void)
 {
-	struct hlist_head *seq_head;
-	struct hlist_node *seq_node;
-	struct hlist_node *tmp;
-	struct name_seq *seq;
 	u32 i;
 
 	if (!table.types)
 		return;
 
+	/* Verify name table is empty, then release it */
+
 	write_lock_bh(&tipc_nametbl_lock);
 	for (i = 0; i < tipc_nametbl_size; i++) {
-		seq_head = &table.types[i];
-		hlist_for_each_entry_safe(seq, seq_node, tmp, seq_head, ns_list) {
-			struct sub_seq *sseq = seq->sseqs;
-
-			for (; sseq != &seq->sseqs[seq->first_free]; sseq++) {
-				struct publication *publ = sseq->zone_list;
-				assert(publ);
-				do {
-					struct publication *next =
-						publ->zone_list_next;
-					kfree(publ);
-					publ = next;
-				}
-				while (publ != sseq->zone_list);
-			}
-		}
+		if (!hlist_empty(&table.types[i]))
+			err("tipc_nametbl_stop(): hash chain %u is non-null\n", i);
 	}
 	kfree(table.types);
 	table.types = NULL;
 	write_unlock_bh(&tipc_nametbl_lock);
 }
+
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 0d5db06..b54462b 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -234,7 +234,6 @@ struct node *tipc_node_attach_link(struc
 		u32 bearer_id = l_ptr->b_ptr->identity;
 		char addr_string[16];
 
-                assert(bearer_id < MAX_BEARERS);
                 if (n_ptr->link_cnt >= 2) {
 			char addr_string[16];
 
@@ -314,7 +313,7 @@ static void node_established_contact(str
 	struct cluster *c_ptr;
 
 	dbg("node_established_contact:-> %x\n", n_ptr->addr);
-	if (!tipc_node_has_active_routes(n_ptr)) { 
+	if (!tipc_node_has_active_routes(n_ptr) && in_own_cluster(n_ptr->addr)) { 
 		tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
 	}
 
diff --git a/net/tipc/node_subscr.c b/net/tipc/node_subscr.c
index cff4068..cc3fff3 100644
--- a/net/tipc/node_subscr.c
+++ b/net/tipc/node_subscr.c
@@ -47,18 +47,19 @@ #include "addr.h"
 void tipc_nodesub_subscribe(struct node_subscr *node_sub, u32 addr, 
 		       void *usr_handle, net_ev_handler handle_down)
 {
-	node_sub->node = NULL;
-	if (addr == tipc_own_addr)
+	if (addr == tipc_own_addr) {
+		node_sub->node = NULL;
 		return;
-	if (!tipc_addr_node_valid(addr)) {
-		warn("node_subscr with illegal %x\n", addr);
+	}
+	
+	node_sub->node = tipc_node_find(addr);
+	if (!node_sub->node) {
+		warn("Node subscription rejected, unknown node 0x%x\n", addr);
 		return;
 	}
-
 	node_sub->handle_node_down = handle_down;
 	node_sub->usr_handle = usr_handle;
-	node_sub->node = tipc_node_find(addr);
-	assert(node_sub->node);
+
 	tipc_node_lock(node_sub->node);
 	list_add_tail(&node_sub->nodesub_list, &node_sub->node->nsub);
 	tipc_node_unlock(node_sub->node);
diff --git a/net/tipc/port.c b/net/tipc/port.c
index 99846a1..3aab67a 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -168,7 +168,6 @@ void tipc_port_recv_mcast(struct sk_buff
 	struct port_list *item = dp;
 	int cnt = 0;
 
-	assert(buf);
 	msg = buf_msg(buf);
 
 	/* Create destination port list, if one wasn't supplied */
diff --git a/net/tipc/ref.c b/net/tipc/ref.c
index 33bbf50..d2f0cce 100644
--- a/net/tipc/ref.c
+++ b/net/tipc/ref.c
@@ -127,7 +127,14 @@ u32 tipc_ref_acquire(void *object, spinl
 	u32 next_plus_upper;
 	u32 reference = 0;
 
-	assert(tipc_ref_table.entries && object);
+	if (!object) {
+		err("Attempt to acquire reference to non-existent object\n");
+		return 0;
+	}
+	if (!tipc_ref_table.entries) {
+		err("Reference table not found during acquisition attempt\n");
+		return 0;
+	}
 
 	write_lock_bh(&ref_table_lock);
 	if (tipc_ref_table.first_free) {
@@ -162,15 +169,28 @@ void tipc_ref_discard(u32 ref)
 	u32 index; 
 	u32 index_mask;
 
-	assert(tipc_ref_table.entries);
-	assert(ref != 0);
+	if (!ref) {
+		err("Attempt to discard reference 0\n");
+		return;
+	}
+	if (!tipc_ref_table.entries) {
+		err("Reference table not found during discard attempt\n");
+		return;
+	}
 
 	write_lock_bh(&ref_table_lock);
 	index_mask = tipc_ref_table.index_mask;
 	index = ref & index_mask;
 	entry = &(tipc_ref_table.entries[index]);
-	assert(entry->object != 0);
-	assert(entry->data.reference == ref);
+
+	if (!entry->object) {
+		err("Attempt to discard reference to non-existent object\n");
+		goto exit;
+	}
+	if (entry->data.reference != ref) {
+		err("Attempt to discard non-existent reference\n");
+		goto exit;
+	}
 
 	/* mark entry as unused */
 	entry->object = NULL;
@@ -184,6 +204,7 @@ void tipc_ref_discard(u32 ref)
 
 	/* increment upper bits of entry to invalidate subsequent references */
 	entry->data.next_plus_upper = (ref & ~index_mask) + (index_mask + 1);
+exit:
 	write_unlock_bh(&ref_table_lock);
 }
 
-- 
1.4.0

[PATCH 29/32] [TIPC] Enhanced & cleaned up system messages; fixed 2 obscure memory leaks.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/bcast.c      |    2 +
 net/tipc/bcast.h      |    2 +
 net/tipc/bearer.c     |   70 +++++++++++++++++++++++++++----------------------
 net/tipc/cluster.c    |   22 +++++++++------
 net/tipc/config.c     |    2 +
 net/tipc/discover.c   |    7 +----
 net/tipc/link.c       |   39 +++++++++++++++------------
 net/tipc/name_distr.c |   10 ++++---
 net/tipc/name_table.c |    6 ++--
 net/tipc/node.c       |   68 +++++++++++++++++++++++++-----------------------
 net/tipc/port.c       |   10 ++++---
 net/tipc/subscr.c     |   18 ++++++-------
 net/tipc/zone.c       |   19 ++++++++-----
 13 files changed, 149 insertions(+), 126 deletions(-)

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 44645f5..1633ef2 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -785,7 +785,7 @@ int tipc_bclink_init(void)
 	bclink = kmalloc(sizeof(*bclink), GFP_ATOMIC);
 	if (!bcbearer || !bclink) {
  nomem:
-	 	warn("Memory squeeze; Failed to create multicast link\n");
+	 	warn("Multicast link creation failed, no memory\n");
 		kfree(bcbearer);
 		bcbearer = NULL;
 		kfree(bclink);
diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h
index 0e3be2a..b243d9d 100644
--- a/net/tipc/bcast.h
+++ b/net/tipc/bcast.h
@@ -180,7 +180,7 @@ static inline void tipc_port_list_add(st
 		if (!item->next) {
 			item->next = kmalloc(sizeof(*item), GFP_ATOMIC);
 			if (!item->next) {
-				warn("Memory squeeze: multicast destination port list is incomplete\n");
+				warn("Incomplete multicast delivery, no memory\n");
 				return;
 			}
 			item->next->next = NULL;
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index e213a8e..4fa24b5 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -112,39 +112,42 @@ int  tipc_register_media(u32 media_type,
 		goto exit;
 
 	if (!media_name_valid(name)) {
-		warn("Media registration error: illegal name <%s>\n", name);
+		warn("Media <%s> rejected, illegal name\n", name);
 		goto exit;
 	}
 	if (!bcast_addr) {
-		warn("Media registration error: no broadcast address supplied\n");
+		warn("Media <%s> rejected, no broadcast address\n", name);
 		goto exit;
 	}
 	if ((bearer_priority < TIPC_MIN_LINK_PRI) &&
 	    (bearer_priority > TIPC_MAX_LINK_PRI)) {
-		warn("Media registration error: priority %u\n", bearer_priority);
+		warn("Media <%s> rejected, illegal priority (%u)\n", name, 
+		     bearer_priority);
 		goto exit;
 	}
 	if ((link_tolerance < TIPC_MIN_LINK_TOL) || 
 	    (link_tolerance > TIPC_MAX_LINK_TOL)) {
-		warn("Media registration error: tolerance %u\n", link_tolerance);
+		warn("Media <%s> rejected, illegal tolerance (%u)\n", name,
+		     link_tolerance);
 		goto exit;
 	}
 
 	media_id = media_count++;
 	if (media_id >= MAX_MEDIA) {
-		warn("Attempt to register more than %u media\n", MAX_MEDIA);
+		warn("Media <%s> rejected, media limit reached (%u)\n", name,
+		     MAX_MEDIA);
 		media_count--;
 		goto exit;
 	}
 	for (i = 0; i < media_id; i++) {
 		if (media_list[i].type_id == media_type) {
-			warn("Attempt to register second media with type %u\n", 
+			warn("Media <%s> rejected, duplicate type (%u)\n", name,
 			     media_type);
 			media_count--;
 			goto exit;
 		}
 		if (!strcmp(name, media_list[i].name)) {
-			warn("Attempt to re-register media name <%s>\n", name);
+			warn("Media <%s> rejected, duplicate name\n", name);
 			media_count--;
 			goto exit;
 		}
@@ -283,6 +286,9 @@ static struct bearer *bearer_find(const 
 	struct bearer *b_ptr;
 	u32 i;
 
+	if (tipc_mode != TIPC_NET_MODE)
+		return NULL;
+
 	for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) {
 		if (b_ptr->active && (!strcmp(b_ptr->publ.name, name)))
 			return b_ptr;
@@ -475,26 +481,33 @@ int tipc_enable_bearer(const char *name,
 	u32 i;
 	int res = -EINVAL;
 
-	if (tipc_mode != TIPC_NET_MODE)
+	if (tipc_mode != TIPC_NET_MODE) {
+		warn("Bearer <%s> rejected, not supported in standalone mode\n",
+		     name);
 		return -ENOPROTOOPT;
-
-	if (!bearer_name_validate(name, &b_name) ||
-	    !tipc_addr_domain_valid(bcast_scope) ||
-	    !in_scope(bcast_scope, tipc_own_addr))
+	}
+	if (!bearer_name_validate(name, &b_name)) {
+		warn("Bearer <%s> rejected, illegal name\n", name);
 		return -EINVAL;
-
+	}
+	if (!tipc_addr_domain_valid(bcast_scope) || 
+	    !in_scope(bcast_scope, tipc_own_addr)) {
+		warn("Bearer <%s> rejected, illegal broadcast scope\n", name);
+		return -EINVAL;
+	}
 	if ((priority < TIPC_MIN_LINK_PRI ||
 	     priority > TIPC_MAX_LINK_PRI) &&
-	    (priority != TIPC_MEDIA_LINK_PRI))
+	    (priority != TIPC_MEDIA_LINK_PRI)) {
+		warn("Bearer <%s> rejected, illegal priority\n", name);
 		return -EINVAL;
+	}
 
 	write_lock_bh(&tipc_net_lock);
-	if (!tipc_bearers)
-		goto failed;
 
 	m_ptr = media_find(b_name.media_name);
 	if (!m_ptr) {
-		warn("No media <%s>\n", b_name.media_name);
+		warn("Bearer <%s> rejected, media <%s> not registered\n", name,
+		     b_name.media_name);
 		goto failed;
 	}
 
@@ -510,23 +523,24 @@ restart:
 			continue;
 		}
 		if (!strcmp(name, tipc_bearers[i].publ.name)) {
-			warn("Bearer <%s> already enabled\n", name);
+			warn("Bearer <%s> rejected, already enabled\n", name);
 			goto failed;
 		}
 		if ((tipc_bearers[i].priority == priority) &&
 		    (++with_this_prio > 2)) {
 			if (priority-- == 0) {
-				warn("Third bearer <%s> with priority %u, unable to lower to %u\n",
-				     name, priority + 1, priority);
+				warn("Bearer <%s> rejected, duplicate priority\n",
+				     name);
 				goto failed;
 			}
-			warn("Third bearer <%s> with priority %u, lowering to %u\n",
+			warn("Bearer <%s> priority adjustment required %u->%u\n",
 			     name, priority + 1, priority);
 			goto restart;
 		}
 	}
 	if (bearer_id >= MAX_BEARERS) {
-		warn("Attempt to enable more than %d bearers\n", MAX_BEARERS);
+		warn("Bearer <%s> rejected, bearer limit reached (%u)\n", 
+		     name, MAX_BEARERS);
 		goto failed;
 	}
 
@@ -536,7 +550,7 @@ restart:
 	strcpy(b_ptr->publ.name, name);
 	res = m_ptr->enable_bearer(&b_ptr->publ);
 	if (res) {
-		warn("Failed to enable bearer <%s>\n", name);
+		warn("Bearer <%s> rejected, enable failure (%d)\n", name, -res);
 		goto failed;
 	}
 
@@ -573,9 +587,6 @@ int tipc_block_bearer(const char *name)
 	struct link *l_ptr;
 	struct link *temp_l_ptr;
 
-	if (tipc_mode != TIPC_NET_MODE)
-		return -ENOPROTOOPT;
-
 	read_lock_bh(&tipc_net_lock);
 	b_ptr = bearer_find(name);
 	if (!b_ptr) {
@@ -584,6 +595,7 @@ int tipc_block_bearer(const char *name)
 		return -EINVAL;
 	}
 
+	info("Blocking bearer <%s>\n", name);
 	spin_lock_bh(&b_ptr->publ.lock);
 	b_ptr->publ.blocked = 1;
 	list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
@@ -595,7 +607,6 @@ int tipc_block_bearer(const char *name)
 	}
 	spin_unlock_bh(&b_ptr->publ.lock);
 	read_unlock_bh(&tipc_net_lock);
-	info("Blocked bearer <%s>\n", name);
 	return TIPC_OK;
 }
 
@@ -611,15 +622,13 @@ static int bearer_disable(const char *na
 	struct link *l_ptr;
 	struct link *temp_l_ptr;
 
-	if (tipc_mode != TIPC_NET_MODE)
-		return -ENOPROTOOPT;
-
 	b_ptr = bearer_find(name);
 	if (!b_ptr) {
 		warn("Attempt to disable unknown bearer <%s>\n", name);
 		return -EINVAL;
 	}
 
+	info("Disabling bearer <%s>\n", name);
 	tipc_disc_stop_link_req(b_ptr->link_req);
 	spin_lock_bh(&b_ptr->publ.lock);
 	b_ptr->link_req = NULL;
@@ -635,7 +644,6 @@ static int bearer_disable(const char *na
 		tipc_link_delete(l_ptr);
 	}
 	spin_unlock_bh(&b_ptr->publ.lock);
-	info("Disabled bearer <%s>\n", name);
 	memset(b_ptr, 0, sizeof(struct bearer));
 	return TIPC_OK;
 }
diff --git a/net/tipc/cluster.c b/net/tipc/cluster.c
index 1aed815..1dcb694 100644
--- a/net/tipc/cluster.c
+++ b/net/tipc/cluster.c
@@ -60,8 +60,10 @@ struct cluster *tipc_cltr_create(u32 add
 	int alloc;
 
 	c_ptr = (struct cluster *)kmalloc(sizeof(*c_ptr), GFP_ATOMIC);
-	if (c_ptr == NULL)
+	if (c_ptr == NULL) {
+		warn("Cluster creation failure, no memory\n");
 		return NULL;
+	}
 	memset(c_ptr, 0, sizeof(*c_ptr));
 
 	c_ptr->addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0);
@@ -70,30 +72,32 @@ struct cluster *tipc_cltr_create(u32 add
 	else
 		max_nodes = tipc_max_nodes + 1;
 	alloc = sizeof(void *) * (max_nodes + 1);
+
 	c_ptr->nodes = (struct node **)kmalloc(alloc, GFP_ATOMIC);
 	if (c_ptr->nodes == NULL) {
+		warn("Cluster creation failure, no memory for node area\n");
 		kfree(c_ptr);
 		return NULL;
 	}
-	memset(c_ptr->nodes, 0, alloc);  
+	memset(c_ptr->nodes, 0, alloc);
+
 	if (in_own_cluster(addr))
 		tipc_local_nodes = c_ptr->nodes;
 	c_ptr->highest_slave = LOWEST_SLAVE - 1;
 	c_ptr->highest_node = 0;
 	
 	z_ptr = tipc_zone_find(tipc_zone(addr));
-	if (z_ptr == NULL) {
+	if (!z_ptr) {
 		z_ptr = tipc_zone_create(addr);
 	}
-	if (z_ptr != NULL) {
-		tipc_zone_attach_cluster(z_ptr, c_ptr);
-		c_ptr->owner = z_ptr;
-	}
-	else {
+	if (!z_ptr) {
+		kfree(c_ptr->nodes);
 		kfree(c_ptr);
-		c_ptr = NULL;
+		return NULL;
 	}
 
+	tipc_zone_attach_cluster(z_ptr, c_ptr);
+	c_ptr->owner = z_ptr;
 	return c_ptr;
 }
 
diff --git a/net/tipc/config.c b/net/tipc/config.c
index 41c8447..3ec502f 100644
--- a/net/tipc/config.c
+++ b/net/tipc/config.c
@@ -642,7 +642,7 @@ static void cfg_named_msg_event(void *us
 	if ((size < sizeof(*req_hdr)) ||
 	    (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) ||
 	    (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) {
-		warn("discarded invalid configuration message\n");
+		warn("Invalid configuration message discarded\n");
 		return;
 	}
 
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 9260138..ee9b448 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -176,7 +176,6 @@ void tipc_disc_recv_msg(struct sk_buff *
 			n_ptr = tipc_node_create(orig);
 		}
 		if (n_ptr == NULL) {
-			warn("Memory squeeze; Failed to create node\n");
 			return;
 		}
 		spin_lock_bh(&n_ptr->lock);
@@ -191,10 +190,8 @@ void tipc_disc_recv_msg(struct sk_buff *
 		}
 		addr = &link->media_addr;
 		if (memcmp(addr, &media_addr, sizeof(*addr))) {
-			char addr_string[16];
-
-			warn("New bearer address for %s\n", 
-			     addr_string_fill(addr_string, orig));
+			warn("Resetting link <%s>, peer interface address changed\n",
+			     link->name);
 			memcpy(addr, &media_addr, sizeof(*addr));
 			tipc_link_reset(link);     
 		}
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 2efced5..d7668b8 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -419,7 +419,7 @@ struct link *tipc_link_create(struct bea
 
 	l_ptr = (struct link *)kmalloc(sizeof(*l_ptr), GFP_ATOMIC);
 	if (!l_ptr) {
-		warn("Memory squeeze; Failed to create link\n");
+		warn("Link creation failed, no memory\n");
 		return NULL;
 	}
 	memset(l_ptr, 0, sizeof(*l_ptr));
@@ -469,7 +469,7 @@ struct link *tipc_link_create(struct bea
 
 		if (!pb) {
 			kfree(l_ptr);
-			warn("Memory squeeze; Failed to create link\n");
+			warn("Link creation failed, no memory for print buffer\n");
 			return NULL;
 		}
 		tipc_printbuf_init(&l_ptr->print_buf, pb, LINK_LOG_BUF_SIZE);
@@ -819,6 +819,8 @@ static void link_state_event(struct link
 			break;
 		case RESET_MSG:
 			dbg_link("RES -> RR\n");
+			info("Resetting link <%s>, requested by peer\n", 
+			     l_ptr->name);
 			tipc_link_reset(l_ptr);
 			l_ptr->state = RESET_RESET;
 			l_ptr->fsm_msg_cnt = 0;
@@ -843,6 +845,8 @@ static void link_state_event(struct link
 			break;
 		case RESET_MSG:
 			dbg_link("RES -> RR\n");
+			info("Resetting link <%s>, requested by peer "
+			     "while probing\n", l_ptr->name);
 			tipc_link_reset(l_ptr);
 			l_ptr->state = RESET_RESET;
 			l_ptr->fsm_msg_cnt = 0;
@@ -874,6 +878,8 @@ static void link_state_event(struct link
 			} else {	/* Link has failed */
 				dbg_link("-> RU (%u probes unanswered)\n",
 					 l_ptr->fsm_msg_cnt);
+				warn("Resetting link <%s>, peer not responding\n",
+				     l_ptr->name);
 				tipc_link_reset(l_ptr);
 				l_ptr->state = RESET_UNKNOWN;
 				l_ptr->fsm_msg_cnt = 0;
@@ -1049,7 +1055,7 @@ int tipc_link_send_buf(struct link *l_pt
 		msg_dbg(msg, "TIPC: Congestion, throwing away\n");
 		buf_discard(buf);
 		if (imp > CONN_MANAGER) {
-			warn("Resetting <%s>, send queue full", l_ptr->name);
+			warn("Resetting link <%s>, send queue full", l_ptr->name);
 			tipc_link_reset(l_ptr);
 		}
 		return dsz;
@@ -2228,7 +2234,7 @@ static void link_recv_proto_msg(struct l
 		
 		if (msg_linkprio(msg) && 
 		    (msg_linkprio(msg) != l_ptr->priority)) {
-			warn("Changing prio <%s>: %u->%u\n",
+			warn("Resetting link <%s>, priority change %u->%u\n",
 			     l_ptr->name, l_ptr->priority, msg_linkprio(msg));
 			l_ptr->priority = msg_linkprio(msg);
 			tipc_link_reset(l_ptr); /* Enforce change to take effect */
@@ -2348,7 +2354,8 @@ void tipc_link_changeover(struct link *l
 			msg_dbg(&tunnel_hdr, "EMPTY>SEND>");
 			tipc_link_send_buf(tunnel, buf);
 		} else {
-			warn("Memory squeeze; link changeover failed\n");
+			warn("Link changeover error, "
+			     "unable to send changeover msg\n");
 		}
 		return;
 	}
@@ -2398,7 +2405,8 @@ void tipc_link_send_duplicate(struct lin
 		msg_set_size(&tunnel_hdr, length + INT_H_SIZE);
 		outbuf = buf_acquire(length + INT_H_SIZE);
 		if (outbuf == NULL) {
-			warn("Memory squeeze; buffer duplication failed\n");
+			warn("Link changeover error, "
+			     "unable to send duplicate msg\n");
 			return;
 		}
 		memcpy(outbuf->data, (unchar *)&tunnel_hdr, INT_H_SIZE);
@@ -2473,7 +2481,7 @@ static int link_recv_changeover_msg(stru
 		}
 		*buf = buf_extract(tunnel_buf,INT_H_SIZE);
 		if (*buf == NULL) {
-			warn("Memory squeeze; failed to extract msg\n");
+			warn("Link changeover error, duplicate msg dropped\n");
 			goto exit;
 		}
 		msg_dbg(tunnel_msg, "TNL<REC<");
@@ -2485,6 +2493,8 @@ static int link_recv_changeover_msg(stru
 
 	if (tipc_link_is_up(dest_link)) {
 		msg_dbg(tunnel_msg, "UP/FIRST/<REC<");
+		info("Resetting link <%s>, changeover initiated by peer\n",
+		     dest_link->name);
 		tipc_link_reset(dest_link);
 		dest_link->exp_msg_count = msg_count;
 		if (!msg_count)
@@ -2514,7 +2524,7 @@ static int link_recv_changeover_msg(stru
 			buf_discard(tunnel_buf);
 			return 1;
 		} else {
-			warn("Memory squeeze; dropped incoming msg\n");
+			warn("Link changeover error, original msg dropped\n");
 		}
 	}
 exit:
@@ -2536,13 +2546,8 @@ void tipc_link_recv_bundle(struct sk_buf
 	while (msgcount--) {
 		obuf = buf_extract(buf, pos);
 		if (obuf == NULL) {
-			char addr_string[16];
-
-			warn("Buffer allocation failure;\n");
-			warn("  incoming message(s) from %s lost\n",
-			     addr_string_fill(addr_string, 
-					      msg_orignode(buf_msg(buf))));
-			return;
+			warn("Link unable to unbundle message(s)\n");
+			break;
 		};
 		pos += align(msg_size(buf_msg(obuf)));
 		msg_dbg(buf_msg(obuf), "     /");
@@ -2600,7 +2605,7 @@ int tipc_link_send_long_buf(struct link 
 		}
 		fragm = buf_acquire(fragm_sz + INT_H_SIZE);
 		if (fragm == NULL) {
-			warn("Memory squeeze; failed to fragment msg\n");
+			warn("Link unable to fragment message\n");
 			dsz = -ENOMEM;
 			goto exit;
 		}
@@ -2715,7 +2720,7 @@ int tipc_link_recv_fragment(struct sk_bu
 			set_fragm_size(pbuf,fragm_sz); 
 			set_expected_frags(pbuf,exp_fragm_cnt - 1); 
 		} else {
-			warn("Memory squeeze; got no defragmenting buffer\n");
+			warn("Link unable to reassemble fragmented message\n");
 		}
 		buf_discard(fbuf);
 		return 0;
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index 5718ecb..f0b063b 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -127,7 +127,7 @@ void tipc_named_publish(struct publicati
 
 	buf = named_prepare_buf(PUBLICATION, ITEM_SIZE, 0);
 	if (!buf) {
-		warn("Memory squeeze; failed to distribute publication\n");
+		warn("Publication distribution failure\n");
 		return;
 	}
 
@@ -151,7 +151,7 @@ void tipc_named_withdraw(struct publicat
 
 	buf = named_prepare_buf(WITHDRAWAL, ITEM_SIZE, 0);
 	if (!buf) {
-		warn("Memory squeeze; failed to distribute withdrawal\n");
+		warn("Withdrawl distribution failure\n");
 		return;
 	}
 
@@ -184,8 +184,8 @@ void tipc_named_node_up(unsigned long no
 			left = (rest <= max_item_buf) ? rest : max_item_buf;
 			rest -= left;
 			buf = named_prepare_buf(PUBLICATION, left, node);       
-			if (buf == NULL) {
-				warn("Memory Squeeze; could not send publication\n");
+			if (!buf) {
+				warn("Bulk publication distribution failure\n");
 				goto exit;
 			}
 			item = (struct distr_item *)msg_data(buf_msg(buf));
@@ -291,7 +291,7 @@ void tipc_named_recv(struct sk_buff *buf
 				    ntohl(item->ref), ntohl(item->key));
 			}
 		} else {
-			warn("tipc_named_recv: unknown msg\n");
+			warn("Unrecognized name table message received\n");
 		}
 		item++;
 	}
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index e90dc80..3857130 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -120,7 +120,7 @@ static struct publication *publ_create(u
 	struct publication *publ =
 		(struct publication *)kmalloc(sizeof(*publ), GFP_ATOMIC);
 	if (publ == NULL) {
-		warn("Memory squeeze; failed to create publication\n");
+		warn("Publication creation failure, no memory\n");
 		return NULL;
 	}
 
@@ -165,7 +165,7 @@ static struct name_seq *tipc_nameseq_cre
 	struct sub_seq *sseq = tipc_subseq_alloc(1);
 
 	if (!nseq || !sseq) {
-		warn("Memory squeeze; failed to create name sequence\n");
+		warn("Name sequence creation failed, no memory\n");
 		kfree(nseq);
 		kfree(sseq);
 		return NULL;
@@ -759,7 +759,7 @@ struct publication *tipc_nametbl_publish
 	struct publication *publ;
 
 	if (table.local_publ_count >= tipc_max_publications) {
-		warn("Failed publish: max %u local publication\n", 
+		warn("Publication failed, local publication limit reached (%u)\n", 
 		     tipc_max_publications);
 		return NULL;
 	}
diff --git a/net/tipc/node.c b/net/tipc/node.c
index b54462b..5f09754 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -61,34 +61,37 @@ struct node *tipc_node_create(u32 addr)
         struct node **curr_node;
 
 	n_ptr = kmalloc(sizeof(*n_ptr),GFP_ATOMIC);
-        if (n_ptr != NULL) {
-                memset(n_ptr, 0, sizeof(*n_ptr));
-                n_ptr->addr = addr;
-                n_ptr->lock =  SPIN_LOCK_UNLOCKED;	
-                INIT_LIST_HEAD(&n_ptr->nsub);
-	
-		c_ptr = tipc_cltr_find(addr);
-                if (c_ptr == NULL)
-                        c_ptr = tipc_cltr_create(addr);
-                if (c_ptr != NULL) {
-                        n_ptr->owner = c_ptr;
-                        tipc_cltr_attach_node(c_ptr, n_ptr);
-                        n_ptr->last_router = -1;
-
-                        /* Insert node into ordered list */
-                        for (curr_node = &tipc_nodes; *curr_node; 
-			     curr_node = &(*curr_node)->next) {
-                                if (addr < (*curr_node)->addr) {
-                                        n_ptr->next = *curr_node;
-                                        break;
-                                }
-                        }
-                        (*curr_node) = n_ptr;
-                } else {
-                        kfree(n_ptr);
-                        n_ptr = NULL;
-                }
-        }
+	if (!n_ptr) {
+		warn("Node creation failed, no memory\n");
+		return NULL;
+	}
+
+	c_ptr = tipc_cltr_find(addr);
+	if (!c_ptr) {
+		c_ptr = tipc_cltr_create(addr);
+	}
+	if (!c_ptr) {
+		kfree(n_ptr);
+		return NULL;
+	}
+		
+	memset(n_ptr, 0, sizeof(*n_ptr));
+	n_ptr->addr = addr;
+	n_ptr->lock =  SPIN_LOCK_UNLOCKED;	
+	INIT_LIST_HEAD(&n_ptr->nsub);
+	n_ptr->owner = c_ptr;
+	tipc_cltr_attach_node(c_ptr, n_ptr);
+	n_ptr->last_router = -1;
+
+	/* Insert node into ordered list */
+	for (curr_node = &tipc_nodes; *curr_node; 
+	     curr_node = &(*curr_node)->next) {
+		if (addr < (*curr_node)->addr) {
+			n_ptr->next = *curr_node;
+			break;
+		}
+	}
+	(*curr_node) = n_ptr;
 	return n_ptr;
 }
 
@@ -132,7 +135,7 @@ void tipc_node_link_up(struct node *n_pt
 		return;
 	}
 	if (l_ptr->priority < active[0]->priority) { 
-		info("Link is standby\n");
+		info("New link <%s> becomes standby\n", l_ptr->name);
 		return;
 	}
 	tipc_link_send_duplicate(active[0], l_ptr);
@@ -140,8 +143,9 @@ void tipc_node_link_up(struct node *n_pt
 		active[0] = l_ptr;
 		return;
 	}
-	info("Link <%s> on network plane %c becomes standby\n",
-	     active[0]->name, active[0]->b_ptr->net_plane);
+	info("Old link <%s> becomes standby\n", active[0]->name);
+	if (active[1] != active[0])
+		info("Old link <%s> becomes standby\n", active[1]->name);
 	active[0] = active[1] = l_ptr;
 }
 
@@ -248,7 +252,7 @@ struct node *tipc_node_attach_link(struc
                         n_ptr->link_cnt++;
                         return n_ptr;
                 }
-                err("Attempt to establish second link on <%s> to <%s> \n",
+                err("Attempt to establish second link on <%s> to %s \n",
                     l_ptr->b_ptr->publ.name, 
 		    addr_string_fill(addr_string, l_ptr->addr));
         }
diff --git a/net/tipc/port.c b/net/tipc/port.c
index 3aab67a..47d9740 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -195,7 +195,7 @@ void tipc_port_recv_mcast(struct sk_buff
 			struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
 
 			if (b == NULL) {
-				warn("Buffer allocation failure\n");
+				warn("Unable to deliver multicast message(s)\n");
 				msg_dbg(msg, "LOST:");
 				goto exit;
 			}
@@ -227,14 +227,14 @@ u32 tipc_createport_raw(void *usr_handle
 	u32 ref;
 
 	p_ptr = kmalloc(sizeof(*p_ptr), GFP_ATOMIC);
-	if (p_ptr == NULL) {
-		warn("Memory squeeze; failed to create port\n");
+	if (!p_ptr) {
+		warn("Port creation failed, no memory\n");
 		return 0;
 	}
 	memset(p_ptr, 0, sizeof(*p_ptr));
 	ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
 	if (!ref) {
-		warn("Reference Table Exhausted\n");
+		warn("Port creation failed, reference table exhausted\n");
 		kfree(p_ptr);
 		return 0;
 	}
@@ -1059,7 +1059,7 @@ int tipc_createport(u32 user_ref, 
 	u32 ref;
 
 	up_ptr = (struct user_port *)kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
-	if (up_ptr == NULL) {
+	if (!up_ptr) {
 		warn("Port creation failed, no memory\n");
 		return -ENOMEM;
 	}
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index c5f026c..fc17187 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -266,7 +266,8 @@ static void subscr_subscribe(struct tipc
 	/* Refuse subscription if global limit exceeded */
 
 	if (atomic_read(&topsrv.subscription_count) >= tipc_max_subscriptions) {
-		warn("Failed: max %u subscriptions\n", tipc_max_subscriptions);
+		warn("Subscription rejected, subscription limit reached (%u)\n",
+		     tipc_max_subscriptions);
 		subscr_terminate(subscriber);
 		return;
 	}
@@ -274,8 +275,8 @@ static void subscr_subscribe(struct tipc
 	/* Allocate subscription object */
 
 	sub = kmalloc(sizeof(*sub), GFP_ATOMIC);
-	if (sub == NULL) {
-		warn("Memory squeeze; ignoring subscription\n");
+	if (!sub) {
+		warn("Subscription rejected, no memory\n");
 		subscr_terminate(subscriber);
 		return;
 	}
@@ -298,8 +299,7 @@ static void subscr_subscribe(struct tipc
 	if ((((sub->filter != TIPC_SUB_PORTS) 
 	      && (sub->filter != TIPC_SUB_SERVICE)))
 	    || (sub->seq.lower > sub->seq.upper)) {
-		warn("Rejecting illegal subscription %u,%u,%u\n",
-		     sub->seq.type, sub->seq.lower, sub->seq.upper);
+		warn("Subscription rejected, illegal request\n");
 		kfree(sub);
 		subscr_terminate(subscriber);
 		return;
@@ -387,7 +387,7 @@ static void subscr_named_msg_event(void 
 	dbg("subscr_named_msg_event: orig = %x own = %x,\n",
 	    orig->node, tipc_own_addr);
 	if (size && (size != sizeof(struct tipc_subscr))) {
-		warn("Received tipc_subscr of invalid size\n");
+		warn("Subscriber rejected, invalid subscription size\n");
 		return;
 	}
 
@@ -395,7 +395,7 @@ static void subscr_named_msg_event(void 
 
 	subscriber = kmalloc(sizeof(struct subscriber), GFP_ATOMIC);
 	if (subscriber == NULL) {
-		warn("Memory squeeze; ignoring subscriber setup\n");
+		warn("Subscriber rejected, no memory\n");
 		return;
 	}
 	memset(subscriber, 0, sizeof(struct subscriber));
@@ -403,7 +403,7 @@ static void subscr_named_msg_event(void 
 	INIT_LIST_HEAD(&subscriber->subscriber_list);
 	subscriber->ref = tipc_ref_acquire(subscriber, &subscriber->lock);
 	if (subscriber->ref == 0) {
-		warn("Failed to acquire subscriber reference\n");
+		warn("Subscriber rejected, reference table exhausted\n");
 		kfree(subscriber);
 		return;
 	}
@@ -422,7 +422,7 @@ static void subscr_named_msg_event(void 
 			NULL,
 			&subscriber->port_ref);
 	if (subscriber->port_ref == 0) {
-		warn("Memory squeeze; failed to create subscription port\n");
+		warn("Subscriber rejected, unable to create port\n");
 		tipc_ref_discard(subscriber->ref);
 		kfree(subscriber);
 		return;
diff --git a/net/tipc/zone.c b/net/tipc/zone.c
index 2803e1b..316c487 100644
--- a/net/tipc/zone.c
+++ b/net/tipc/zone.c
@@ -44,19 +44,24 @@ #include "node.h"
 
 struct _zone *tipc_zone_create(u32 addr)
 {
-	struct _zone *z_ptr = NULL;
+	struct _zone *z_ptr;
 	u32 z_num;
 
-	if (!tipc_addr_domain_valid(addr))
+	if (!tipc_addr_domain_valid(addr)) {
+		err("Zone creation failed, invalid domain 0x%x\n", addr);
 		return NULL;
+	}
 
 	z_ptr = (struct _zone *)kmalloc(sizeof(*z_ptr), GFP_ATOMIC);
-	if (z_ptr != NULL) {
-		memset(z_ptr, 0, sizeof(*z_ptr));
-		z_num = tipc_zone(addr);
-		z_ptr->addr = tipc_addr(z_num, 0, 0);
-		tipc_net.zones[z_num] = z_ptr;
+	if (!z_ptr) {
+		warn("Zone creation failed, insufficient memory\n");
+		return NULL;
 	}
+
+	memset(z_ptr, 0, sizeof(*z_ptr));
+	z_num = tipc_zone(addr);
+	z_ptr->addr = tipc_addr(z_num, 0, 0);
+	tipc_net.zones[z_num] = z_ptr;
 	return z_ptr;
 }
 
-- 
1.4.0

[PATCH 30/32] [TIPC] Fixed link switchover bugs

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Incorporates several related fixes:
- switchover now occurs when switching from an active link to a standby link
- failure of a standby link no longer initiates switchover
- links now display correct # of received packtes following reactivation

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/link.c |   30 ++++++++++++++++++++++++------
 net/tipc/node.c |    7 +++++--
 net/tipc/node.h |    2 ++
 3 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/net/tipc/link.c b/net/tipc/link.c
index d7668b8..d646580 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -690,6 +690,7 @@ void tipc_link_reset(struct link *l_ptr)
 	struct sk_buff *buf;
 	u32 prev_state = l_ptr->state;
 	u32 checkpoint = l_ptr->next_in_no;
+	int was_active_link = tipc_link_is_active(l_ptr);
 	
 	msg_set_session(l_ptr->pmsg, msg_session(l_ptr->pmsg) + 1);
 
@@ -711,7 +712,7 @@ #if 0
 	tipc_printf(TIPC_CONS, "\nReset link <%s>\n", l_ptr->name);
 	dbg_link_dump();
 #endif
-	if (tipc_node_has_active_links(l_ptr->owner) &&
+	if (was_active_link && tipc_node_has_active_links(l_ptr->owner) &&
 	    l_ptr->owner->permit_changeover) {
 		l_ptr->reset_checkpoint = checkpoint;
 		l_ptr->exp_msg_count = START_CHANGEOVER;
@@ -754,7 +755,7 @@ #endif
 
 static void link_activate(struct link *l_ptr)
 {
-	l_ptr->next_in_no = 1;
+	l_ptr->next_in_no = l_ptr->stats.recv_info = 1;
 	tipc_node_link_up(l_ptr->owner, l_ptr);
 	tipc_bearer_add_dest(l_ptr->b_ptr, l_ptr->addr);
 	link_send_event(tipc_cfg_link_event, l_ptr, 1);
@@ -2303,12 +2304,18 @@ void tipc_link_tunnel(struct link *l_ptr
 	u32 length = msg_size(msg);
 
 	tunnel = l_ptr->owner->active_links[selector & 1];
-	if (!tipc_link_is_up(tunnel))
+	if (!tipc_link_is_up(tunnel)) {
+		warn("Link changeover error, "
+		     "tunnel link no longer available\n");
 		return;
+	}
 	msg_set_size(tunnel_hdr, length + INT_H_SIZE);
 	buf = buf_acquire(length + INT_H_SIZE);
-	if (!buf)
+	if (!buf) {
+		warn("Link changeover error, "
+		     "unable to send tunnel msg\n");
 		return;
+	}
 	memcpy(buf->data, (unchar *)tunnel_hdr, INT_H_SIZE);
 	memcpy(buf->data + INT_H_SIZE, (unchar *)msg, length);
 	dbg("%c->%c:", l_ptr->b_ptr->net_plane, tunnel->b_ptr->net_plane);
@@ -2328,19 +2335,23 @@ void tipc_link_changeover(struct link *l
 	u32 msgcount = l_ptr->out_queue_size;
 	struct sk_buff *crs = l_ptr->first_out;
 	struct link *tunnel = l_ptr->owner->active_links[0];
-	int split_bundles = tipc_node_has_redundant_links(l_ptr->owner);
 	struct tipc_msg tunnel_hdr;
+	int split_bundles;
 
 	if (!tunnel)
 		return;
 
-	if (!l_ptr->owner->permit_changeover)
+	if (!l_ptr->owner->permit_changeover) {
+		warn("Link changeover error, "
+		     "peer did not permit changeover\n");
 		return;
+	}
 
 	msg_init(&tunnel_hdr, CHANGEOVER_PROTOCOL,
 		 ORIGINAL_MSG, TIPC_OK, INT_H_SIZE, l_ptr->addr);
 	msg_set_bearer_id(&tunnel_hdr, l_ptr->peer_bearer_id);
 	msg_set_msgcnt(&tunnel_hdr, msgcount);
+	dbg("Link changeover requires %u tunnel messages\n", msgcount);
 
 	if (!l_ptr->first_out) {
 		struct sk_buff *buf;
@@ -2360,6 +2371,9 @@ void tipc_link_changeover(struct link *l
 		return;
 	}
 
+	split_bundles = (l_ptr->owner->active_links[0] != 
+			 l_ptr->owner->active_links[1]);
+
 	while (crs) {
 		struct tipc_msg *msg = buf_msg(crs);
 
@@ -2497,11 +2511,13 @@ static int link_recv_changeover_msg(stru
 		     dest_link->name);
 		tipc_link_reset(dest_link);
 		dest_link->exp_msg_count = msg_count;
+		dbg("Expecting %u tunnelled messages\n", msg_count);
 		if (!msg_count)
 			goto exit;
 	} else if (dest_link->exp_msg_count == START_CHANGEOVER) {
 		msg_dbg(tunnel_msg, "BLK/FIRST/<REC<");
 		dest_link->exp_msg_count = msg_count;
+		dbg("Expecting %u tunnelled messages\n", msg_count);
 		if (!msg_count)
 			goto exit;
 	}
@@ -2509,6 +2525,8 @@ static int link_recv_changeover_msg(stru
 	/* Receive original message */
 
 	if (dest_link->exp_msg_count == 0) {
+		warn("Link switchover error, "
+		     "got too many tunnelled messages\n");
 		msg_dbg(tunnel_msg, "OVERDUE/DROP/<REC<");
 		dbg_print_link(dest_link, "LINK:");
 		goto exit;
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 5f09754..ce9678e 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -125,6 +125,8 @@ void tipc_node_link_up(struct node *n_pt
 {
 	struct link **active = &n_ptr->active_links[0];
 
+	n_ptr->working_links++;
+
 	info("Established link <%s> on network plane %c\n",
 	     l_ptr->name, l_ptr->b_ptr->net_plane);
 	
@@ -185,6 +187,8 @@ void tipc_node_link_down(struct node *n_
 {
 	struct link **active;
 
+	n_ptr->working_links--;
+
 	if (!tipc_link_is_active(l_ptr)) {
 		info("Lost standby link <%s> on network plane %c\n",
 		     l_ptr->name, l_ptr->b_ptr->net_plane);
@@ -214,8 +218,7 @@ int tipc_node_has_active_links(struct no
 
 int tipc_node_has_redundant_links(struct node *n_ptr)
 {
-	return (tipc_node_has_active_links(n_ptr) &&
-		(n_ptr->active_links[0] != n_ptr->active_links[1]));
+	return (n_ptr->working_links > 1);
 }
 
 static int tipc_node_has_active_routes(struct node *n_ptr)
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 781126e..a07cc79 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -51,6 +51,7 @@ #include "bearer.h"
  * @nsub: list of "node down" subscriptions monitoring node
  * @active_links: pointers to active links to node
  * @links: pointers to all links to node
+ * @working_links: number of working links to node (both active and standby)
  * @link_cnt: number of links to node
  * @permit_changeover: non-zero if node has redundant links to this system
  * @routers: bitmap (used for multicluster communication)
@@ -76,6 +77,7 @@ struct node {
 	struct link *active_links[2];
 	struct link *links[MAX_BEARERS];
 	int link_cnt;
+	int working_links;
 	int permit_changeover;
 	u32 routers[512/32];
 	int last_router;
-- 
1.4.0

[PATCH 31/32] [TIPC] Get rid of dynamically allocated arrays in broadcast code.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

This change improves an earlier change which replaced the large local
variable arrays used during broadcasting with dynamically allocated arrays.
The temporary arrays are now incoprorated into the multicast link data
structure.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/bcast.c |   41 +++++++++++++++++------------------------
 1 files changed, 17 insertions(+), 24 deletions(-)

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 1633ef2..5412804 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -81,7 +81,14 @@ struct bcbearer_pair {
  * @bearer: (non-standard) broadcast bearer structure
  * @media: (non-standard) broadcast media structure
  * @bpairs: array of bearer pairs
- * @bpairs_temp: array of bearer pairs used during creation of "bpairs"
+ * @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 "bc_lock".
  */
 
 struct bcbearer {
@@ -89,6 +96,8 @@ struct bcbearer {
 	struct media media;
 	struct bcbearer_pair bpairs[MAX_BEARERS];
 	struct bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1];
+	struct node_map remains;
+	struct node_map remains_new;
 };
 
 /**
@@ -551,12 +560,8 @@ static int tipc_bcbearer_send(struct sk_
 {
 	static int send_count = 0;
 
-	struct node_map *remains;
-	struct node_map *remains_new;
-	struct node_map *remains_tmp;
 	int bp_index;
 	int swap_time;
-	int err;
 
 	/* Prepare buffer for broadcasting (if first time trying to send it) */
 
@@ -577,9 +582,7 @@ static int tipc_bcbearer_send(struct sk_
 
 	/* Send buffer over bearers until all targets reached */
 	
-	remains = kmalloc(sizeof(struct node_map), GFP_ATOMIC);
-	remains_new = kmalloc(sizeof(struct node_map), GFP_ATOMIC);
-	*remains = tipc_cltr_bcast_nodes;
+	bcbearer->remains = tipc_cltr_bcast_nodes;
 
 	for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) {
 		struct bearer *p = bcbearer->bpairs[bp_index].primary;
@@ -588,8 +591,8 @@ static int tipc_bcbearer_send(struct sk_
 		if (!p)
 			break;	/* no more bearers to try */
 
-		tipc_nmap_diff(remains, &p->nodes, remains_new);
-		if (remains_new->count == remains->count)
+		tipc_nmap_diff(&bcbearer->remains, &p->nodes, &bcbearer->remains_new);
+		if (bcbearer->remains_new.count == bcbearer->remains.count)
 			continue;	/* bearer pair doesn't add anything */
 
 		if (!p->publ.blocked &&
@@ -607,27 +610,17 @@ swap:
 		bcbearer->bpairs[bp_index].primary = s;
 		bcbearer->bpairs[bp_index].secondary = p;
 update:
-		if (remains_new->count == 0) {
-			err = TIPC_OK;
-			goto out;
-		}
+		if (bcbearer->remains_new.count == 0)
+			return TIPC_OK;
 
-		/* swap map */
-		remains_tmp = remains;
-		remains = remains_new;
-		remains_new = remains_tmp;
+		bcbearer->remains = bcbearer->remains_new;
 	}
 	
 	/* Unable to reach all targets */
 
 	bcbearer->bearer.publ.blocked = 1;
 	bcl->stats.bearer_congs++;
-	err = ~TIPC_OK;
-
- out:
-	kfree(remains_new);
-	kfree(remains);
-	return err;
+	return ~TIPC_OK;
 }
 
 /**
-- 
1.4.0

[PATCH 32/32] [TIPC] Fix incorrect correction to discovery timer frequency computation.

[Per Liden]

From: Allan Stephens <allan.stephens@windriver.com>

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
---
 net/tipc/discover.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index ee9b448..2b84412 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -2,7 +2,7 @@
  * net/tipc/discover.c
  * 
  * Copyright (c) 2003-2006, Ericsson AB
- * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 2005-2006, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -267,8 +267,8 @@ static void disc_timeout(struct link_req
 		/* leave timer interval "as is" if already at a "normal" rate */
 	} else {
 		req->timer_intv *= 2;
-		if (req->timer_intv > TIPC_LINK_REQ_SLOW)
-			req->timer_intv = TIPC_LINK_REQ_SLOW;
+		if (req->timer_intv > TIPC_LINK_REQ_FAST)
+			req->timer_intv = TIPC_LINK_REQ_FAST;
 		if ((req->timer_intv == TIPC_LINK_REQ_FAST) && 
 		    (req->bearer->nodes.count))
 			req->timer_intv = TIPC_LINK_REQ_SLOW;
-- 
1.4.0

Re: [PATCH 0/32] TIPC updates

[David Miller]

From: Per Liden <per.liden@ericsson.com>
Date: Thu, 22 Jun 2006 13:14:46 +0200 (CEST)

> Patches can be pulled from:
> 
> 	git://tipc.cslab.ericsson.net/pub/git/tipc.git

Since this would not merge cleanly into Linus's current tree,
I applied all of the patches by hand.

Thanks a lot.

RE: [PATCH 7/32] [TIPC] Multicast link failure now resets all links to "nacking" node.

[Stephens, Allan]

Nice observation, James.  As a relative newcomer to the official Linux
kernel development world, I'm impressed that non-TIPC folks are looking
at TIPC changes closely enough to see things like this!

Per, I'll leave it to you to decide if you want to address James's
concern.  But be aware that the link_reset_all() routine is only called
to handle emergency situations when TIPC's multicast link has run into
serious problems and is trying to recover.  Most systems will never
follow this path, so the cost of the unnecessary
local_bh_disable()/local_bh_enable() pairing shouldn't have any real
impact on the overall performance of TIPC.

Regards,
Al Stephens

> -----Original Message-----
> From: James Morris [mailto:jmorris@namei.org] 
> Sent: Thursday, June 22, 2006 2:51 PM
> To: Per Liden
> Cc: David Miller; netdev@vger.kernel.org; Stephens, Allan
> Subject: Re: [PATCH 7/32] [TIPC] Multicast link failure now 
> resets all links to "nacking" node.
> 
> On Thu, 22 Jun 2006, Per Liden wrote:
> 
> > +static void link_reset_all(unsigned long addr) {
> > +	struct node *n_ptr;
> > +	char addr_string[16];
> > +	u32 i;
> > +
> > +	read_lock_bh(&tipc_net_lock);
> > +	n_ptr = tipc_node_find((u32)addr);
> > +	if (!n_ptr) {
> > +		read_unlock_bh(&tipc_net_lock);
> > +		return;	/* node no longer exists */
> > +	}
> > +
> > +	tipc_node_lock(n_ptr);
> 
> You already have bh's disabled here, and tipc_node_lock() 
> also disables them.
> 
> Not sure if it's really worth worrying about but if so, you 
> could perhaps implement tipc_node_lock_bh() and tipc_node_lock().
> 
> 
> 
> - James
> -- 
> James Morris
> <jmorris@namei.org>
> 

RE: [PATCH 7/32] [TIPC] Multicast link failure now resets all links to "nacking" node.

[Per Liden]

On Thu, 22 Jun 2006, Stephens, Allan wrote:

[...]
> Per, I'll leave it to you to decide if you want to address James's
> concern.  But be aware that the link_reset_all() routine is only called
> to handle emergency situations when TIPC's multicast link has run into
> serious problems and is trying to recover.  Most systems will never
> follow this path, so the cost of the unnecessary
> local_bh_disable()/local_bh_enable() pairing shouldn't have any real
> impact on the overall performance of TIPC.

I tend to agree with you Allan. Since local_bh_disable()/local_bh_enable() 
supports nesting and this code is only called in extreme situations I 
don't think it's a real problem.

/Per