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Revert "tipc: do not update mtu if msg_max is too small in mtu negotiation"

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This reverts commit 259683001d.

It breaks the Android KABI and will be brought back at a later time when
it is safe to do so.

Bug: 161946584
Change-Id: I4666e57ed5637ba314fd5399d78bb5750f29506a
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2023-06-13 18:44:28 +00:00
parent 9626cfb677
commit d71d75e074
1 changed files with 3 additions and 6 deletions
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9
net/tipc/link.c
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@@ -2200,7 +2200,7 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
struct tipc_msg *hdr = buf_msg(skb); struct tipc_msg *hdr = buf_msg(skb);
struct tipc_gap_ack_blks *ga = NULL; struct tipc_gap_ack_blks *ga = NULL;
bool reply = msg_probe(hdr), retransmitted = false; bool reply = msg_probe(hdr), retransmitted = false;
u32 dlen = msg_data_sz(hdr), glen = 0, msg_max; u32 dlen = msg_data_sz(hdr), glen = 0;
u16 peers_snd_nxt = msg_next_sent(hdr); u16 peers_snd_nxt = msg_next_sent(hdr);
u16 peers_tol = msg_link_tolerance(hdr); u16 peers_tol = msg_link_tolerance(hdr);
u16 peers_prio = msg_linkprio(hdr); u16 peers_prio = msg_linkprio(hdr);
@@ -2239,9 +2239,6 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
switch (mtyp) { switch (mtyp) {
case RESET_MSG: case RESET_MSG:
case ACTIVATE_MSG: case ACTIVATE_MSG:
msg_max = msg_max_pkt(hdr);
if (msg_max < tipc_bearer_min_mtu(l->net, l->bearer_id))
break;
/* Complete own link name with peer's interface name */ /* Complete own link name with peer's interface name */
if_name = strrchr(l->name, ':') + 1; if_name = strrchr(l->name, ':') + 1;
if (sizeof(l->name) - (if_name - l->name) <= TIPC_MAX_IF_NAME) if (sizeof(l->name) - (if_name - l->name) <= TIPC_MAX_IF_NAME)
@@ -2286,8 +2283,8 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
l->peer_session = msg_session(hdr); l->peer_session = msg_session(hdr);
l->in_session = true; l->in_session = true;
l->peer_bearer_id = msg_bearer_id(hdr); l->peer_bearer_id = msg_bearer_id(hdr);
if (l->mtu > msg_max) if (l->mtu > msg_max_pkt(hdr))
l->mtu = msg_max; l->mtu = msg_max_pkt(hdr);
break; break;
case STATE_MSG: case STATE_MSG: