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| author | Neil Horman <nhorman@tuxdriver.com> | 2010-03-15 07:58:45 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-16 21:23:24 -0700 |
| commit | ca50910185fcce694af0cc194de50d2374a7c7ef (patch) | |
| tree | 536680f779e146ba2f793c6139e569c8af8178d6 /net/tipc | |
| parent | 1a624832a06b465d0e5651901bcbc3680c78d374 (diff) | |
| download | linux-ca50910185fcce694af0cc194de50d2374a7c7ef.tar.gz linux-ca50910185fcce694af0cc194de50d2374a7c7ef.tar.bz2 linux-ca50910185fcce694af0cc194de50d2374a7c7ef.zip | |
tipc: Allow retransmission of cloned buffers
Forward port commit
fc477e160af086f6e30c3d4fdf5f5c000d29beb5
from git://tipc.cslab.ericsson.net/pub/git/people/allan/tipc.git
Origional commit message:
Allow retransmission of cloned buffers
This patch fixes an issue with TIPC's message retransmission logic
that prevented retransmission of clone sk_buffs. Originally intended
as a means of avoiding wasted work in retransmitting messages that
were still on the driver's outbound queue, it also prevented TIPC
from retransmitting messages through other means -- such as the
secondary bearer of the broadcast link, or another interface in a
set of bonded interfaces. This fix removes existing checks for
cloned sk_buffs that prevented such retransmission.
Origionally-Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/link.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index 1a7e4665af80..49f2be8622a9 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1553,7 +1553,7 @@ u32 tipc_link_push_packet(struct link *l_ptr) /* Continue retransmission now, if there is anything: */ - if (r_q_size && buf && !skb_cloned(buf)) { + if (r_q_size && buf) { msg_set_ack(buf_msg(buf), mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(buf_msg(buf), l_ptr->owner->bclink.last_in); if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { @@ -1722,15 +1722,16 @@ void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf, dbg("Retransmitting %u in link %x\n", retransmits, l_ptr); if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) { - if (!skb_cloned(buf)) { + if (l_ptr->retransm_queue_size == 0) { 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 */ + err("Unexpected retransmit on link %s (qsize=%d)\n", + l_ptr->name, l_ptr->retransm_queue_size); } + return; } else { /* Detect repeated retransmit failures on uncongested bearer */ @@ -1745,7 +1746,7 @@ void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf, } } - while (retransmits && (buf != l_ptr->next_out) && buf && !skb_cloned(buf)) { + while (retransmits && (buf != l_ptr->next_out) && 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); |