From 239e81048b7dcd27448db40c845f88ac7c68424e Mon Sep 17 00:00:00 2001 From: Joe Eykholt Date: Tue, 20 Jul 2010 15:21:07 -0700 Subject: [SCSI] libfc: add interface to allocate a sequence for incoming requests For incoming ELS and FCP requests, we often don't require an exchange and sequence, however, sometimes we do. For those cases, (primarily FCP requests for targets) add a function to set up the exchange and sequence. Signed-off-by: Joe Eykholt Signed-off-by: Robert Love Signed-off-by: James Bottomley --- drivers/scsi/libfc/fc_exch.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/scsi/libfc') diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index 61eabd3ce436..027042a6de3b 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -1230,6 +1230,28 @@ free: fc_frame_free(rx_fp); } +/** + * fc_seq_assign() - Assign exchange and sequence for incoming request + * @lport: The local port that received the request + * @fp: The request frame + * + * On success, the sequence pointer will be returned and also in fr_seq(@fp). + */ +static struct fc_seq *fc_seq_assign(struct fc_lport *lport, struct fc_frame *fp) +{ + struct fc_exch_mgr_anchor *ema; + + WARN_ON(lport != fr_dev(fp)); + WARN_ON(fr_seq(fp)); + fr_seq(fp) = NULL; + + list_for_each_entry(ema, &lport->ema_list, ema_list) + if ((!ema->match || ema->match(fp)) && + fc_seq_lookup_recip(lport, ema->mp, fp) != FC_RJT_NONE) + break; + return fr_seq(fp); +} + /** * fc_exch_recv_req() - Handler for an incoming request where is other * end is originating the sequence @@ -2283,6 +2305,9 @@ int fc_exch_init(struct fc_lport *lport) if (!lport->tt.seq_exch_abort) lport->tt.seq_exch_abort = fc_seq_exch_abort; + if (!lport->tt.seq_assign) + lport->tt.seq_assign = fc_seq_assign; + return 0; } EXPORT_SYMBOL(fc_exch_init); -- cgit v1.2.3