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authorErik Hugne <erik.hugne@ericsson.com>2014-02-19 08:37:58 +0100
committerDavid S. Miller <davem@davemloft.net>2014-02-19 16:40:57 -0500
commit63fa01c147b98eaf5e5e4620c3c7bea8e9ddbbc1 (patch)
tree1ccb3537b09f42c0fffe9542ffb693c7bd1f75e8 /net
parent5f4d4e3f1cfe97b1d7d696e2608c41c2ad123cfc (diff)
tipc: failed transmissions should return error
When a message could not be sent out because the destination node or link could not be found, the full message size is returned from sendmsg() as if it had been sent successfully. An application will then get a false indication that it's making forward progress. This problem has existed since the initial commit in 2.6.16. We change this to return -ENETUNREACH if the message cannot be delivered due to the destination node/link being unavailable. We also get rid of the redundant tipc_reject_msg call since freeing the buffer and doing a tipc_port_iovec_reject accomplishes exactly the same thing. Signed-off-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/tipc/link.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 284d6383ad6c..d1a764b9b2d8 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1020,12 +1020,9 @@ exit:
read_unlock_bh(&tipc_net_lock);
/* Couldn't find a link to the destination node */
- if (buf)
- return tipc_reject_msg(buf, TIPC_ERR_NO_NODE);
- if (res >= 0)
- return tipc_port_iovec_reject(sender, hdr, msg_sect, len,
- TIPC_ERR_NO_NODE);
- return res;
+ kfree_skb(buf);
+ tipc_port_iovec_reject(sender, hdr, msg_sect, len, TIPC_ERR_NO_NODE);
+ return -ENETUNREACH;
}
/*
@@ -1163,8 +1160,9 @@ error:
} else {
reject:
kfree_skb_list(buf_chain);
- return tipc_port_iovec_reject(sender, hdr, msg_sect,
- len, TIPC_ERR_NO_NODE);
+ tipc_port_iovec_reject(sender, hdr, msg_sect, len,
+ TIPC_ERR_NO_NODE);
+ return -ENETUNREACH;
}
/* Append chain of fragments to send queue & send them */