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 <[email protected]> --- drivers/scsi/libfc/fc_exch.c | 25 +++++++++++++++++++++++++ include/scsi/libfc.h | 7 +++++++ 2 files changed, 32 insertions(+), 0 deletions(-) diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c index 61eabd3..027042a 100644 --- a/drivers/scsi/libfc/fc_exch.c +++ b/drivers/scsi/libfc/fc_exch.c @@ -1231,6 +1231,28 @@ free: } /** + * 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 * @lport: The local port that received the request @@ -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); diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h index a6414ec..605f1d7 100644 --- a/include/scsi/libfc.h +++ b/include/scsi/libfc.h @@ -556,6 +556,13 @@ struct libfc_function_template { struct fc_seq *(*seq_start_next)(struct fc_seq *); /* + * Assign a sequence for an incoming request frame. + * + * STATUS: OPTIONAL + */ + struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *); + + /* * Reset an exchange manager, completing all sequences and exchanges. * If s_id is non-zero, reset only exchanges originating from that FID. * If d_id is non-zero, reset only exchanges sending to that FID. _______________________________________________ devel mailing list [email protected] http://www.open-fcoe.org/mailman/listinfo/devel
