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tipc: Add check to prevent insertion of duplicate name table entries

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Adds a new check to TIPC's name table logic to reject any attempt to
create a new name publication that is identical to an existing one.
(Such an attempt will never happen under normal circumstances, but
could arise if another network node malfunctions and issues a duplicate
name publication message.)

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
This commit is contained in:
Allan Stephens 2011-11-03 11:12:01 -04:00 committed by Paul Gortmaker
parent c422f1bdc3
commit f80c24d996
1 changed files with 7 additions and 0 deletions
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7
net/tipc/name_table.c
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@ -268,6 +268,13 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
} }
info = sseq->info; info = sseq->info;
/* Check if an identical publication already exists */
list_for_each_entry(publ, &info->zone_list, zone_list) {
if ((publ->ref == port) && (publ->key == key) &&
(!publ->node || (publ->node == node)))
return NULL;
}
} else { } else {
u32 inspos; u32 inspos;
struct sub_seq *freesseq; struct sub_seq *freesseq;