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tipc: Prevent crash when broadcast link cannot send to all nodes

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Allow TIPC's broadcast link to continue operation when it is unable
to send a message to all nodes in the cluster.  Previously, the
broadcast link attempted to put the broadcast pseudo-bearer into a
blocked state; however, this caused a crash because the associated
bearer structure is only partially initialized.  Further
investigation has revealed some conceptual problems with blocking
the pseudo-bearer; consequently, this functionality has been
disabled for the time being and the undelivered message is
eventually resent by the broadcast link's existing message
retransmission mechanism (if possible).

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Allan Stephens 2010-08-17 11:00:08 +00:00 committed by David S. Miller
parent b02b69c8a4
commit 7e3e5d0950
1 changed files with 6 additions and 4 deletions
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10
net/tipc/bcast.c
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@ -609,11 +609,13 @@ static int tipc_bcbearer_send(struct sk_buff *buf,
bcbearer->remains = bcbearer->remains_new;
}
/* Unable to reach all targets */
/*
* Unable to reach all targets (indicate success, since currently
* there isn't code in place to properly block & unblock the
* pseudo-bearer used by the broadcast link)
*/
bcbearer->bearer.publ.blocked = 1;
bcl->stats.bearer_congs++;
return 1;
return TIPC_OK;
}
/**