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authorIngo Molnar <mingo@elte.hu>2008-07-21 15:06:09 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-21 15:06:09 +0200
commite66d90fb4abd0a27ee96f57a32fb561221c4d6ae (patch)
tree3337cba94c7444b06fdb0e8b487287d07b71f4a0 /net/tipc/name_table.c
parent55ca089e2579de90f048aca2a3030b8b2f864813 (diff)
parent14b395e35d1afdd8019d11b92e28041fad591b71 (diff)
Merge branch 'linus' into xen-64bit
Diffstat (limited to 'net/tipc/name_table.c')
-rw-r--r--net/tipc/name_table.c55
1 files changed, 38 insertions, 17 deletions
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index ac7dfdda797..cd72e22b132 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -2,7 +2,7 @@
* net/tipc/name_table.c: TIPC name table code
*
* Copyright (c) 2000-2006, Ericsson AB
- * Copyright (c) 2004-2005, Wind River Systems
+ * Copyright (c) 2004-2008, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -52,9 +52,16 @@ static int tipc_nametbl_size = 1024; /* must be a power of 2 */
* struct sub_seq - container for all published instances of a name sequence
* @lower: name sequence lower bound
* @upper: name sequence upper bound
- * @node_list: circular list of matching publications with >= node scope
- * @cluster_list: circular list of matching publications with >= cluster scope
- * @zone_list: circular list of matching publications with >= zone scope
+ * @node_list: circular list of publications made by own node
+ * @cluster_list: circular list of publications made by own cluster
+ * @zone_list: circular list of publications made by own zone
+ * @node_list_size: number of entries in "node_list"
+ * @cluster_list_size: number of entries in "cluster_list"
+ * @zone_list_size: number of entries in "zone_list"
+ *
+ * Note: The zone list always contains at least one entry, since all
+ * publications of the associated name sequence belong to it.
+ * (The cluster and node lists may be empty.)
*/
struct sub_seq {
@@ -63,6 +70,9 @@ struct sub_seq {
struct publication *node_list;
struct publication *cluster_list;
struct publication *zone_list;
+ u32 node_list_size;
+ u32 cluster_list_size;
+ u32 zone_list_size;
};
/**
@@ -74,7 +84,7 @@ struct sub_seq {
* @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
+ * @lock: spinlock controlling access to publication lists of all sub-sequences
*/
struct name_seq {
@@ -317,6 +327,7 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
dbg("inserting publ %p, node=0x%x publ->node=0x%x, subscr->node=%p\n",
publ, node, publ->node, publ->subscr.node);
+ sseq->zone_list_size++;
if (!sseq->zone_list)
sseq->zone_list = publ->zone_list_next = publ;
else {
@@ -325,6 +336,7 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
}
if (in_own_cluster(node)) {
+ sseq->cluster_list_size++;
if (!sseq->cluster_list)
sseq->cluster_list = publ->cluster_list_next = publ;
else {
@@ -335,6 +347,7 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
}
if (node == tipc_own_addr) {
+ sseq->node_list_size++;
if (!sseq->node_list)
sseq->node_list = publ->node_list_next = publ;
else {
@@ -411,6 +424,7 @@ static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 i
} else {
sseq->zone_list = NULL;
}
+ sseq->zone_list_size--;
/* Remove publication from cluster scope list, if present */
@@ -439,6 +453,7 @@ static struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 i
} else {
sseq->cluster_list = NULL;
}
+ sseq->cluster_list_size--;
}
end_cluster:
@@ -469,6 +484,7 @@ end_cluster:
} else {
sseq->node_list = NULL;
}
+ sseq->node_list_size--;
}
end_node:
@@ -709,15 +725,18 @@ int tipc_nametbl_mc_translate(u32 type, u32 lower, u32 upper, u32 limit,
if (sseq->lower > upper)
break;
- publ = sseq->cluster_list;
- if (publ && (publ->scope <= limit))
+
+ publ = sseq->node_list;
+ if (publ) {
do {
- if (publ->node == tipc_own_addr)
+ if (publ->scope <= limit)
tipc_port_list_add(dports, publ->ref);
- else
- res = 1;
- publ = publ->cluster_list_next;
- } while (publ != sseq->cluster_list);
+ publ = publ->node_list_next;
+ } while (publ != sseq->node_list);
+ }
+
+ if (sseq->cluster_list_size != sseq->node_list_size)
+ res = 1;
}
spin_unlock_bh(&seq->lock);
@@ -905,6 +924,9 @@ static void nameseq_list(struct name_seq *seq, struct print_buf *buf, u32 depth,
struct sub_seq *sseq;
char typearea[11];
+ if (seq->first_free == 0)
+ return;
+
sprintf(typearea, "%-10u", seq->type);
if (depth == 1) {
@@ -915,7 +937,9 @@ static void nameseq_list(struct name_seq *seq, struct print_buf *buf, u32 depth,
for (sseq = seq->sseqs; sseq != &seq->sseqs[seq->first_free]; sseq++) {
if ((lowbound <= sseq->upper) && (upbound >= sseq->lower)) {
tipc_printf(buf, "%s ", typearea);
+ spin_lock_bh(&seq->lock);
subseq_list(sseq, buf, depth, index);
+ spin_unlock_bh(&seq->lock);
sprintf(typearea, "%10s", " ");
}
}
@@ -1050,15 +1074,12 @@ void tipc_nametbl_dump(void)
int tipc_nametbl_init(void)
{
- int array_size = sizeof(struct hlist_head) * tipc_nametbl_size;
-
- table.types = kzalloc(array_size, GFP_ATOMIC);
+ table.types = kcalloc(tipc_nametbl_size, sizeof(struct hlist_head),
+ GFP_ATOMIC);
if (!table.types)
return -ENOMEM;
- write_lock_bh(&tipc_nametbl_lock);
table.local_publ_count = 0;
- write_unlock_bh(&tipc_nametbl_lock);
return 0;
}