aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/libfc/fc_exch.c
diff options
context:
space:
mode:
authorJoe Eykholt <jeykholt@cisco.com>2010-07-20 15:21:07 -0700
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:06:01 -0500
commit239e81048b7dcd27448db40c845f88ac7c68424e (patch)
treec6d316b365e593a274511fca9562c87db2252a7e /drivers/scsi/libfc/fc_exch.c
parent24f089e2f2c800f88039e9d536d558ec6e349fad (diff)
[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 <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/libfc/fc_exch.c')
-rw-r--r--drivers/scsi/libfc/fc_exch.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 61eabd3ce43..027042a6de3 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);