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6023f1ad34
that accepts FCP requests from libfc HBAs running Fibre Channel over Ethernet (FCoE) and passes them to SCST. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1514 d57e44dd-8a1f-0410-8b47-8ef2f437770f
85 lines
2.5 KiB
Plaintext
85 lines
2.5 KiB
Plaintext
libfc: add method for setting handler for incoming exchange
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Add a method for setting handler for incoming exchange.
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For multi-sequence exchanges, this allows the target driver
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to add a response handler for handling subsequent sequences,
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and exchange manager resets.
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The new function is called fc_seq_set_resp().
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Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
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---
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drivers/scsi/libfc/fc_exch.c | 19 +++++++++++++++++++
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include/scsi/libfc.h | 11 ++++++++++-
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2 files changed, 29 insertions(+), 1 deletions(-)
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---
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diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
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index 1ad1ded..aee3c59 100644
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--- a/drivers/scsi/libfc/fc_exch.c
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+++ b/drivers/scsi/libfc/fc_exch.c
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@@ -545,6 +545,22 @@ static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
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return sp;
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}
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+/*
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+ * Set the response handler for the exchange associated with a sequence.
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+ */
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+static void fc_seq_set_resp(struct fc_seq *sp,
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+ void (*resp)(struct fc_seq *, struct fc_frame *,
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+ void *),
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+ void *arg)
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+{
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+ struct fc_exch *ep = fc_seq_exch(sp);
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+
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+ spin_lock_bh(&ep->ex_lock);
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+ ep->resp = resp;
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+ ep->arg = arg;
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+ spin_unlock_bh(&ep->ex_lock);
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+}
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+
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/**
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* fc_seq_exch_abort() - Abort an exchange and sequence
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* @req_sp: The sequence to be aborted
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@@ -2280,6 +2296,9 @@ int fc_exch_init(struct fc_lport *lport)
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if (!lport->tt.seq_start_next)
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lport->tt.seq_start_next = fc_seq_start_next;
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+ if (!lport->tt.seq_set_resp)
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+ lport->tt.seq_set_resp = fc_seq_set_resp;
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+
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if (!lport->tt.exch_seq_send)
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lport->tt.exch_seq_send = fc_exch_seq_send;
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diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
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index 9403d4e..87204da 100644
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--- a/include/scsi/libfc.h
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+++ b/include/scsi/libfc.h
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@@ -566,6 +566,16 @@ struct libfc_function_template {
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struct fc_seq *(*seq_start_next)(struct fc_seq *);
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/*
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+ * Set a response handler for the exchange of the sequence.
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+ *
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+ * STATUS: OPTIONAL
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+ */
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+ void (*seq_set_resp)(struct fc_seq *sp,
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+ void (*resp)(struct fc_seq *, struct fc_frame *,
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+ void *),
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+ void *arg);
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+
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+ /*
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* Reset an exchange manager, completing all sequences and exchanges.
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* If s_id is non-zero, reset only exchanges originating from that FID.
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* If d_id is non-zero, reset only exchanges sending to that FID.
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@@ -1058,7 +1068,6 @@ struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did,
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void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
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void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
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-
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/*
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* EXCHANGE MANAGER LAYER
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*****************************/
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