From: Xin Long <lucien....@gmail.com> Date: Tue, 20 Jun 2017 16:01:55 +0800
> local_cork is used to decide if it should uncork asoc outq after processing > some cmds, and it is set when replying or sending msgs. local_cork should > always have the same value with current asoc q->cork in some way. > > The thing is when changing to a new asoc by cmd SET_ASOC, local_cork may > not be consistent with the current asoc any more. The cmd seqs can be: > > SCTP_CMD_UPDATE_ASSOC (asoc) > SCTP_CMD_REPLY (asoc) > SCTP_CMD_SET_ASOC (new_asoc) > SCTP_CMD_DELETE_TCB (new_asoc) > SCTP_CMD_SET_ASOC (asoc) > SCTP_CMD_REPLY (asoc) > > The 1st REPLY makes OLD asoc q->cork and local_cork both are 1, and the cmd > DELETE_TCB clears NEW asoc q->cork and local_cork. After asoc goes back to > OLD asoc, q->cork is still 1 while local_cork is 0. The 2nd REPLY will not > set local_cork because q->cork is already set and it can't be uncorked and > sent out because of this. > > To keep local_cork consistent with the current asoc q->cork, this patch is > to uncork the old asoc if local_cork is set before changing to the new one. > > Note that the above cmd seqs will be used in the next patch when updating > asoc and handling errors in it. > > Suggested-by: Marcelo Ricardo Leitner <marcelo.leit...@gmail.com> > Signed-off-by: Xin Long <lucien....@gmail.com> Applied.
