Merge branch 'for-2.6.32' into for-2.6.33

9 files changed, 182 insertions, 145 deletions

diff --git a/include/scsi/fc/fc_fc2.h b/include/scsi/fc/fc_fc2.h
index cff8a8c22f5..f87777d0d5b 100644
--- a/include/scsi/fc/fc_fc2.h
+++ b/include/scsi/fc/fc_fc2.h
@@ -92,8 +92,7 @@ struct fc_esb {
 	__u8	_esb_resvd[4];
 	__u8	esb_service_params[112]; /* TBD */
 	__u8	esb_seq_status[8];	/* sequence statuses, 8 bytes each */
-} __attribute__((packed));;
-
+} __attribute__((packed));
 
 /*
  * Define expected size for ASSERTs.
diff --git a/include/scsi/fc/fc_gs.h b/include/scsi/fc/fc_gs.h
index ffab0272c65..324dd0e3c62 100644
--- a/include/scsi/fc/fc_gs.h
+++ b/include/scsi/fc/fc_gs.h
@@ -87,6 +87,7 @@ enum fc_ct_explan {
 	FC_FS_EXP_PNAM =	0x02,	/* port name not registered */
 	FC_FS_EXP_NNAM =	0x03,	/* node name not registered */
 	FC_FS_EXP_COS =		0x04,	/* class of service not registered */
+	FC_FS_EXP_FTNR =	0x07,	/* FC-4 types not registered */
 	/* definitions not complete */
 };
 
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index a0ff61c3e93..27dad703824 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -32,6 +32,7 @@ struct fc_ct_req {
 		struct fc_ns_gid_ft gid;
 		struct fc_ns_rn_id  rn;
 		struct fc_ns_rft rft;
+		struct fc_ns_fid fid;
 	} payload;
 };
 
@@ -57,6 +58,23 @@ static inline void fc_fill_fc_hdr(struct fc_frame *fp, enum fc_rctl r_ctl,
 }
 
 /**
+ * fc_adisc_fill() - Fill in adisc request frame
+ * @lport: local port.
+ * @fp: fc frame where payload will be placed.
+ */
+static inline void fc_adisc_fill(struct fc_lport *lport, struct fc_frame *fp)
+{
+	struct fc_els_adisc *adisc;
+
+	adisc = fc_frame_payload_get(fp, sizeof(*adisc));
+	memset(adisc, 0, sizeof(*adisc));
+	adisc->adisc_cmd = ELS_ADISC;
+	put_unaligned_be64(lport->wwpn, &adisc->adisc_wwpn);
+	put_unaligned_be64(lport->wwnn, &adisc->adisc_wwnn);
+	hton24(adisc->adisc_port_id, fc_host_port_id(lport->host));
+}
+
+/**
  * fc_ct_hdr_fill- fills ct header and reset ct payload
  * returns pointer to ct request.
  */
@@ -77,10 +95,17 @@ static inline struct fc_ct_req *fc_ct_hdr_fill(const struct fc_frame *fp,
 }
 
 /**
- * fc_ct_fill - Fill in a name service request frame
+ * fc_ct_fill() - Fill in a name service request frame
+ * @lport: local port.
+ * @fc_id: FC_ID of non-destination rport for GPN_ID and similar inquiries.
+ * @fp: frame to contain payload.
+ * @op: CT opcode.
+ * @r_ctl: pointer to FC header R_CTL.
+ * @fh_type: pointer to FC-4 type.
  */
-static inline int fc_ct_fill(struct fc_lport *lport, struct fc_frame *fp,
-		      unsigned int op, enum fc_rctl *r_ctl, u32 *did,
+static inline int fc_ct_fill(struct fc_lport *lport,
+		      u32 fc_id, struct fc_frame *fp,
+		      unsigned int op, enum fc_rctl *r_ctl,
 		      enum fc_fh_type *fh_type)
 {
 	struct fc_ct_req *ct;
@@ -91,6 +116,11 @@ static inline int fc_ct_fill(struct fc_lport *lport, struct fc_frame *fp,
 		ct->payload.gid.fn_fc4_type = FC_TYPE_FCP;
 		break;
 
+	case FC_NS_GPN_ID:
+		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_fid));
+		hton24(ct->payload.fid.fp_fid, fc_id);
+		break;
+
 	case FC_NS_RFT_ID:
 		ct = fc_ct_hdr_fill(fp, op, sizeof(struct fc_ns_rft));
 		hton24(ct->payload.rft.fid.fp_fid,
@@ -110,7 +140,6 @@ static inline int fc_ct_fill(struct fc_lport *lport, struct fc_frame *fp,
 		return -EINVAL;
 	}
 	*r_ctl = FC_RCTL_DD_UNSOL_CTL;
-	*did = FC_FID_DIR_SERV;
 	*fh_type = FC_TYPE_CT;
 	return 0;
 }
@@ -249,51 +278,42 @@ static inline void fc_scr_fill(struct fc_lport *lport, struct fc_frame *fp)
 /**
  * fc_els_fill - Fill in an ELS  request frame
  */
-static inline int fc_els_fill(struct fc_lport *lport, struct fc_rport *rport,
+static inline int fc_els_fill(struct fc_lport *lport,
+		       u32 did,
 		       struct fc_frame *fp, unsigned int op,
-		       enum fc_rctl *r_ctl, u32 *did, enum fc_fh_type *fh_type)
+		       enum fc_rctl *r_ctl, enum fc_fh_type *fh_type)
 {
 	switch (op) {
+	case ELS_ADISC:
+		fc_adisc_fill(lport, fp);
+		break;
+
 	case ELS_PLOGI:
 		fc_plogi_fill(lport, fp, ELS_PLOGI);
-		*did = rport->port_id;
 		break;
 
 	case ELS_FLOGI:
 		fc_flogi_fill(lport, fp);
-		*did = FC_FID_FLOGI;
 		break;
 
 	case ELS_LOGO:
 		fc_logo_fill(lport, fp);
-		*did = FC_FID_FLOGI;
-		/*
-		 * if rport is valid then it
-		 * is port logo, therefore
-		 * set did to rport id.
-		 */
-		if (rport)
-			*did = rport->port_id;
 		break;
 
 	case ELS_RTV:
 		fc_rtv_fill(lport, fp);
-		*did = rport->port_id;
 		break;
 
 	case ELS_REC:
 		fc_rec_fill(lport, fp);
-		*did = rport->port_id;
 		break;
 
 	case ELS_PRLI:
 		fc_prli_fill(lport, fp);
-		*did = rport->port_id;
 		break;
 
 	case ELS_SCR:
 		fc_scr_fill(lport, fp);
-		*did = FC_FID_FCTRL;
 		break;
 
 	default:
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index 59511057cee..c35d2383cc2 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -37,13 +37,6 @@
 #define	FC_FRAME_HEADROOM	32	/* headroom for VLAN + FCoE headers */
 #define	FC_FRAME_TAILROOM	8	/* trailer space for FCoE */
 
-/*
- * Information about an individual fibre channel frame received or to be sent.
- * The buffer may be in up to 4 additional non-contiguous sections,
- * but the linear section must hold the frame header.
- */
-#define FC_FRAME_SG_LEN		4	/* scatter/gather list maximum length */
-
 #define fp_skb(fp)	(&((fp)->skb))
 #define fr_hdr(fp)	((fp)->skb.data)
 #define fr_len(fp)	((fp)->skb.len)
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 4426f00da5f..d67dda2b6aa 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -262,6 +262,7 @@ enum iscsi_err {
 	ISCSI_ERR_NO_SCSI_CMD		= ISCSI_ERR_BASE + 17,
 	ISCSI_ERR_INVALID_HOST		= ISCSI_ERR_BASE + 18,
 	ISCSI_ERR_XMIT_FAILED		= ISCSI_ERR_BASE + 19,
+	ISCSI_ERR_TCP_CONN_CLOSE	= ISCSI_ERR_BASE + 20,
 };
 
 /*
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index b92584a8843..65dc9aacbf7 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -51,55 +51,49 @@ do {								\
 		do {						\
 			CMD;					\
 		} while (0);					\
-} while (0);
+} while (0)
 
 #define FC_LIBFC_DBG(fmt, args...)					\
 	FC_CHECK_LOGGING(FC_LIBFC_LOGGING,				\
-			 printk(KERN_INFO "libfc: " fmt, ##args);)
+			 printk(KERN_INFO "libfc: " fmt, ##args))
 
 #define FC_LPORT_DBG(lport, fmt, args...)				\
 	FC_CHECK_LOGGING(FC_LPORT_LOGGING,				\
-			 printk(KERN_INFO "lport: %6x: " fmt,		\
-				fc_host_port_id(lport->host), ##args);)
+			 printk(KERN_INFO "host%u: lport %6x: " fmt,	\
+				(lport)->host->host_no,			\
+				fc_host_port_id((lport)->host), ##args))
 
 #define FC_DISC_DBG(disc, fmt, args...)					\
 	FC_CHECK_LOGGING(FC_DISC_LOGGING,				\
-			 printk(KERN_INFO "disc: %6x: " fmt,		\
-				fc_host_port_id(disc->lport->host),	\
-				##args);)
-
-#define FC_RPORT_DBG(rport, fmt, args...)				\
-do {									\
-	struct fc_rport_libfc_priv *rdata = rport->dd_data;		\
-	struct fc_lport *lport = rdata->local_port;			\
+			 printk(KERN_INFO "host%u: disc: " fmt,		\
+				(disc)->lport->host->host_no,		\
+				##args))
+
+#define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)			\
 	FC_CHECK_LOGGING(FC_RPORT_LOGGING,				\
-			 printk(KERN_INFO "rport: %6x: %6x: " fmt,	\
-				fc_host_port_id(lport->host),		\
-				rport->port_id, ##args);)		\
-} while (0);
+			 printk(KERN_INFO "host%u: rport %6x: " fmt,	\
+				(lport)->host->host_no,			\
+				(port_id), ##args))
+
+#define FC_RPORT_DBG(rdata, fmt, args...)				\
+	FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args)
 
 #define FC_FCP_DBG(pkt, fmt, args...)					\
 	FC_CHECK_LOGGING(FC_FCP_LOGGING,				\
-			 printk(KERN_INFO "fcp: %6x: %6x: " fmt,	\
-				fc_host_port_id(pkt->lp->host),		\
-				pkt->rport->port_id, ##args);)
-
-#define FC_EM_DBG(em, fmt, args...)					\
-	FC_CHECK_LOGGING(FC_EM_LOGGING,					\
-			 printk(KERN_INFO "em: %6x: " fmt,		\
-				fc_host_port_id(em->lp->host),		\
-				##args);)
+			 printk(KERN_INFO "host%u: fcp: %6x: " fmt,	\
+				(pkt)->lp->host->host_no,		\
+				pkt->rport->port_id, ##args))
 
 #define FC_EXCH_DBG(exch, fmt, args...)					\
 	FC_CHECK_LOGGING(FC_EXCH_LOGGING,				\
-			 printk(KERN_INFO "exch: %6x: %4x: " fmt,	\
-				fc_host_port_id(exch->lp->host),	\
-				exch->xid, ##args);)
+			 printk(KERN_INFO "host%u: xid %4x: " fmt,	\
+				(exch)->lp->host->host_no,		\
+				exch->xid, ##args))
 
 #define FC_SCSI_DBG(lport, fmt, args...)				\
 	FC_CHECK_LOGGING(FC_SCSI_LOGGING,                               \
-			 printk(KERN_INFO "scsi: %6x: " fmt,		\
-				fc_host_port_id(lport->host), ##args);)
+			 printk(KERN_INFO "host%u: scsi: " fmt,		\
+				(lport)->host->host_no,	##args))
 
 /*
  * libfc error codes
@@ -125,7 +119,7 @@ do {									\
  * FC HBA status
  */
 enum fc_lport_state {
-	LPORT_ST_NONE = 0,
+	LPORT_ST_DISABLED = 0,
 	LPORT_ST_FLOGI,
 	LPORT_ST_DNS,
 	LPORT_ST_RPN_ID,
@@ -143,53 +137,74 @@ enum fc_disc_event {
 };
 
 enum fc_rport_state {
-	RPORT_ST_NONE = 0,
 	RPORT_ST_INIT,		/* initialized */
 	RPORT_ST_PLOGI,		/* waiting for PLOGI completion */
 	RPORT_ST_PRLI,		/* waiting for PRLI completion */
 	RPORT_ST_RTV,		/* waiting for RTV completion */
 	RPORT_ST_READY,		/* ready for use */
 	RPORT_ST_LOGO,		/* port logout sent */
-};
-
-enum fc_rport_trans_state {
-	FC_PORTSTATE_ROGUE,
-	FC_PORTSTATE_REAL,
+	RPORT_ST_ADISC,		/* Discover Address sent */
+	RPORT_ST_DELETE,	/* port being deleted */
 };
 
 /**
  * struct fc_disc_port - temporary discovery port to hold rport identifiers
- * @lp: Fibre Channel host port instance
- * @peers: node for list management during discovery and RSCN processing
- * @ids: identifiers structure to pass to fc_remote_port_add()
- * @rport_work: work struct for starting the rport state machine
+ * @lp:         Fibre Channel host port instance
+ * @peers:      Node for list management during discovery and RSCN processing
+ * @rport_work: Work struct for starting the rport state machine
+ * @port_id:    Port ID of the discovered port
  */
 struct fc_disc_port {
 	struct fc_lport             *lp;
 	struct list_head            peers;
-	struct fc_rport_identifiers ids;
 	struct work_struct	    rport_work;
+	u32                         port_id;
 };
 
 enum fc_rport_event {
 	RPORT_EV_NONE = 0,
-	RPORT_EV_CREATED,
+	RPORT_EV_READY,
 	RPORT_EV_FAILED,
 	RPORT_EV_STOP,
 	RPORT_EV_LOGO
 };
 
+struct fc_rport_priv;
+
 struct fc_rport_operations {
-	void (*event_callback)(struct fc_lport *, struct fc_rport *,
+	void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
 			       enum fc_rport_event);
 };
 
 /**
  * struct fc_rport_libfc_priv - libfc internal information about a remote port
  * @local_port: Fibre Channel host port instance
+ * @rp_state: indicates READY for I/O or DELETE when blocked.
+ * @flags: REC and RETRY supported flags
+ * @e_d_tov: error detect timeout value (in msec)
+ * @r_a_tov: resource allocation timeout value (in msec)
+ */
+struct fc_rport_libfc_priv {
+	struct fc_lport		   *local_port;
+	enum fc_rport_state        rp_state;
+	u16			   flags;
+	#define FC_RP_FLAGS_REC_SUPPORTED	(1 << 0)
+	#define FC_RP_FLAGS_RETRY		(1 << 1)
+	unsigned int	           e_d_tov;
+	unsigned int	           r_a_tov;
+};
+
+/**
+ * struct fc_rport_priv - libfc rport and discovery info about a remote port
+ * @local_port: Fibre Channel host port instance
+ * @rport: transport remote port
+ * @kref: reference counter
  * @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges
+ * @ids: remote port identifiers and roles
  * @flags: REC and RETRY supported flags
  * @max_seq: maximum number of concurrent sequences
+ * @disc_id: discovery identifier
+ * @maxframe_size: maximum frame size
  * @retries: retry count in current state
  * @e_d_tov: error detect timeout value (in msec)
  * @r_a_tov: resource allocation timeout value (in msec)
@@ -197,38 +212,28 @@ struct fc_rport_operations {
  * @retry_work:
  * @event_callback: Callback for rport READY, FAILED or LOGO
  */
-struct fc_rport_libfc_priv {
+struct fc_rport_priv {
 	struct fc_lport		   *local_port;
+	struct fc_rport		   *rport;
+	struct kref		   kref;
 	enum fc_rport_state        rp_state;
+	struct fc_rport_identifiers ids;
 	u16			   flags;
-	#define FC_RP_FLAGS_REC_SUPPORTED	(1 << 0)
-	#define FC_RP_FLAGS_RETRY		(1 << 1)
 	u16		           max_seq;
+	u16			   disc_id;
+	u16			   maxframe_size;
 	unsigned int	           retries;
 	unsigned int	           e_d_tov;
 	unsigned int	           r_a_tov;
-	enum fc_rport_trans_state  trans_state;
 	struct mutex               rp_mutex;
 	struct delayed_work	   retry_work;
 	enum fc_rport_event        event;
 	struct fc_rport_operations *ops;
 	struct list_head           peers;
 	struct work_struct         event_work;
+	u32			   supported_classes;
 };
 
-#define PRIV_TO_RPORT(x)						\
-	(struct fc_rport *)((void *)x - sizeof(struct fc_rport));
-#define RPORT_TO_PRIV(x)						\
-	(struct fc_rport_libfc_priv *)((void *)x + sizeof(struct fc_rport));
-
-struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *);
-
-static inline void fc_rport_set_name(struct fc_rport *rport, u64 wwpn, u64 wwnn)
-{
-	rport->node_name = wwnn;
-	rport->port_name = wwpn;
-}
-
 /*
  * fcoe stats structure
  */
@@ -344,6 +349,8 @@ static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
  */
 
 struct fc_exch_mgr;
+struct fc_exch_mgr_anchor;
+extern u16	fc_cpu_mask;	/* cpu mask for possible cpus */
 
 /*
  * Sequence.
@@ -368,6 +375,7 @@ struct fc_seq {
  */
 struct fc_exch {
 	struct fc_exch_mgr *em;		/* exchange manager */
+	struct fc_exch_pool *pool;	/* per cpu exches pool */
 	u32		state;		/* internal driver state */
 	u16		xid;		/* our exchange ID */
 	struct list_head	ex_list;	/* free or busy list linkage */
@@ -415,7 +423,7 @@ struct libfc_function_template {
 	 * STATUS: OPTIONAL
 	 */
 	struct fc_seq *(*elsct_send)(struct fc_lport *lport,
-				     struct fc_rport *rport,
+				     u32 did,
 				     struct fc_frame *fp,
 				     unsigned int op,
 				     void (*resp)(struct fc_seq *,
@@ -519,25 +527,6 @@ struct libfc_function_template {
 	void (*exch_done)(struct fc_seq *sp);
 
 	/*
-	 * Assigns a EM and a free XID for an new exchange and then
-	 * allocates a new exchange and sequence pair.
-	 * The fp can be used to determine free XID.
-	 *
-	 * STATUS: OPTIONAL
-	 */
-	struct fc_exch *(*exch_get)(struct fc_lport *lp, struct fc_frame *fp);
-
-	/*
-	 * Release previously assigned XID by exch_get API.
-	 * The LLD may implement this if XID is assigned by LLD
-	 * in exch_get().
-	 *
-	 * STATUS: OPTIONAL
-	 */
-	void (*exch_put)(struct fc_lport *lp, struct fc_exch_mgr *mp,
-			 u16 ex_id);
-
-	/*
 	 * Start a new sequence on the same exchange/sequence tuple.
 	 *
 	 * STATUS: OPTIONAL
@@ -577,9 +566,11 @@ struct libfc_function_template {
 	int (*lport_reset)(struct fc_lport *);
 
 	/*
-	 * Create a remote port
+	 * Create a remote port with a given port ID
+	 *
+	 * STATUS: OPTIONAL
 	 */
-	struct fc_rport *(*rport_create)(struct fc_disc_port *);
+	struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
 
 	/*
 	 * Initiates the RP state machine. It is called from the LP module.
@@ -592,7 +583,7 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*rport_login)(struct fc_rport *rport);
+	int (*rport_login)(struct fc_rport_priv *);
 
 	/*
 	 * Logoff, and remove the rport from the transport if
@@ -600,7 +591,7 @@ struct libfc_function_template {
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	int (*rport_logoff)(struct fc_rport *rport);
+	int (*rport_logoff)(struct fc_rport_priv *);
 
 	/*
 	 * Recieve a request from a remote port.
@@ -608,14 +599,20 @@ struct libfc_function_template {
 	 * STATUS: OPTIONAL
 	 */
 	void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
-			       struct fc_rport *);
+			       struct fc_lport *);
 
 	/*
 	 * lookup an rport by it's port ID.
 	 *
 	 * STATUS: OPTIONAL
 	 */
-	struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
+	struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
+
+	/*
+	 * Destroy an rport after final kref_put().
+	 * The argument is a pointer to the kref inside the fc_rport_priv.
+	 */
+	void (*rport_destroy)(struct kref *);
 
 	/*
 	 * Send a fcp cmd from fsp pkt.
@@ -681,18 +678,16 @@ struct libfc_function_template {
 /* information used by the discovery layer */
 struct fc_disc {
 	unsigned char		retry_count;
-	unsigned char		delay;
 	unsigned char		pending;
 	unsigned char		requested;
 	unsigned short		seq_count;
 	unsigned char		buf_len;
-	enum fc_disc_event	event;
+	u16			disc_id;
 
 	void (*disc_callback)(struct fc_lport *,
 			      enum fc_disc_event);
 
 	struct list_head	 rports;
-	struct list_head	 rogue_rports;
 	struct fc_lport		*lport;
 	struct mutex		disc_mutex;
 	struct fc_gpn_ft_resp	partial_buf;	/* partial name buffer */
@@ -704,9 +699,9 @@ struct fc_lport {
 
 	/* Associations */
 	struct Scsi_Host	*host;
-	struct fc_exch_mgr	*emp;
-	struct fc_rport		*dns_rp;
-	struct fc_rport		*ptp_rp;
+	struct list_head	ema_list;
+	struct fc_rport_priv	*dns_rp;
+	struct fc_rport_priv	*ptp_rp;
 	void			*scsi_priv;
 	struct fc_disc          disc;
 
@@ -960,6 +955,28 @@ int fc_elsct_init(struct fc_lport *lp);
 int fc_exch_init(struct fc_lport *lp);
 
 /*
+ * Adds Exchange Manager (EM) mp to lport.
+ *
+ * Adds specified mp to lport using struct fc_exch_mgr_anchor,
+ * the struct fc_exch_mgr_anchor allows same EM sharing by
+ * more than one lport with their specified match function,
+ * the match function is used in allocating exchange from
+ * added mp.
+ */
+struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
+					   struct fc_exch_mgr *mp,
+					   bool (*match)(struct fc_frame *));
+
+/*
+ * Deletes Exchange Manager (EM) from lport by removing
+ * its anchor ema from lport.
+ *
+ * If removed anchor ema was the last user of its associated EM
+ * then also destroys associated EM.
+ */
+void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema);
+
+/*
  * Allocates an Exchange Manager (EM).
  *
  * The EM manages exchanges for their allocation and
@@ -974,27 +991,25 @@ int fc_exch_init(struct fc_lport *lp);
  * a new exchange.
  * The LLD may choose to have multiple EMs,
  * e.g. one EM instance per CPU receive thread in LLD.
- * The LLD can use exch_get() of struct libfc_function_template
- * to specify XID for a new exchange within
- * a specified EM instance.
  *
- * The em_idx to uniquely identify an EM instance.
+ * Specified match function is used in allocating exchanges
+ * from newly allocated EM.
  */
 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
 				      enum fc_class class,
 				      u16 min_xid,
-				      u16 max_xid);
+				      u16 max_xid,
+				      bool (*match)(struct fc_frame *));
 
 /*
- * Free an exchange manager.
+ * Free all exchange managers of a lport.
  */
-void fc_exch_mgr_free(struct fc_exch_mgr *mp);
+void fc_exch_mgr_free(struct fc_lport *lport);
 
 /*
  * Receive a frame on specified local port and exchange manager.
  */
-void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
-		  struct fc_frame *fp);
+void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp);
 
 /*
  * This function is for exch_seq_send function pointer in
@@ -1036,28 +1051,20 @@ int fc_seq_exch_abort(const struct fc_seq *req_sp, unsigned int timer_msec);
 void fc_exch_done(struct fc_seq *sp);
 
 /*
- * Assigns a EM and XID for a frame and then allocates
- * a new exchange and sequence pair.
- * The fp can be used to determine free XID.
- */
-struct fc_exch *fc_exch_get(struct fc_lport *lp, struct fc_frame *fp);
-
-/*
  * Allocate a new exchange and sequence pair.
- * if ex_id is zero then next free exchange id
- * from specified exchange manger mp will be assigned.
  */
-struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
-			      struct fc_frame *fp, u16 ex_id);
+struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp);
 /*
  * Start a new sequence on the same exchange as the supplied sequence.
  */
 struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
 
+
 /*
- * 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.
+ * Reset all EMs of a lport, releasing its all sequences and
+ * exchanges. If sid is non-zero, then reset only exchanges
+ * we sourced from that FID. If did is non-zero, reset only
+ * exchanges destined to that FID.
  */
 void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
 
@@ -1078,4 +1085,9 @@ void fc_destroy_exch_mgr(void);
 int fc_setup_rport(void);
 void fc_destroy_rport(void);
 
+/*
+ * Internal libfc functions.
+ */
+const char *fc_els_resp_type(struct fc_frame *);
+
 #endif /* _LIBFC_H_ */
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 61afeb59a83..887e57e3e22 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -390,6 +390,7 @@ extern void iscsi_session_failure(struct iscsi_session *session,
 extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 				enum iscsi_param param, char *buf);
 extern void iscsi_suspend_tx(struct iscsi_conn *conn);
+extern void iscsi_suspend_queue(struct iscsi_conn *conn);
 extern void iscsi_conn_queue_work(struct iscsi_conn *conn);
 
 #define iscsi_conn_printk(prefix, _c, fmt, a...) \
@@ -415,6 +416,8 @@ extern struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *, itt_t);
 extern void iscsi_requeue_task(struct iscsi_task *task);
 extern void iscsi_put_task(struct iscsi_task *task);
 extern void __iscsi_get_task(struct iscsi_task *task);
+extern void iscsi_complete_scsi_task(struct iscsi_task *task,
+				     uint32_t exp_cmdsn, uint32_t max_cmdsn);
 
 /*
  * generic helpers
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 3f566af3f10..9af48cbf003 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -187,10 +187,13 @@ struct scsi_device_handler {
 	void (*detach)(struct scsi_device *);
 	int (*activate)(struct scsi_device *);
 	int (*prep_fn)(struct scsi_device *, struct request *);
+	int (*set_params)(struct scsi_device *, const char *);
 };
 
 struct scsi_dh_data {
 	struct scsi_device_handler *scsi_dh;
+	struct scsi_device *sdev;
+	struct kref kref;
 	char buf[0];
 };
 
diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h
index 33efce20c26..ff2407405b4 100644
--- a/include/scsi/scsi_dh.h
+++ b/include/scsi/scsi_dh.h
@@ -60,6 +60,7 @@ extern int scsi_dh_activate(struct request_queue *);
 extern int scsi_dh_handler_exist(const char *);
 extern int scsi_dh_attach(struct request_queue *, const char *);
 extern void scsi_dh_detach(struct request_queue *);
+extern int scsi_dh_set_params(struct request_queue *, const char *);
 #else
 static inline int scsi_dh_activate(struct request_queue *req)
 {
@@ -77,4 +78,8 @@ static inline void scsi_dh_detach(struct request_queue *q)
 {
 	return;
 }
+static inline int scsi_dh_set_params(struct request_queue *req, const char *params)
+{
+	return -SCSI_DH_NOSYS;
+}
 #endif