tree 4957b2abccb9a0b95294651446e1e124f4d3cab5
parent d30fc5126efb0c33b7adf5966d3051db2c3d7721
author Xin Long <lucien.xin@gmail.com> 1511615915 +0800
committer David S. Miller <davem@davemloft.net> 1512158784 -0500

sctp: abandon the whole msg if one part of a fragmented message is abandoned

As rfc3758#section-3.1 demands:

   A3) When a TSN is "abandoned", if it is part of a fragmented message,
       all other TSN's within that fragmented message MUST be abandoned
       at the same time.

Besides, if it couldn't handle this, the rest frags would never get
assembled in peer side.

This patch supports it by adding abandoned flag in sctp_datamsg, when
one chunk is being abandoned, set chunk->msg->abandoned as well. Next
time when checking for abandoned, go checking chunk->msg->abandoned
first.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>