Merge commit 'v2.6.32' into reiserfs/kill-bkl

Merge-reason: The tree was based 2.6.31. It's better to be up to date
with 2.6.32. Although no conflicting changes were made in between,
it gives benchmarking results closer to the lastest kernel behaviour.

12 files changed, 200 insertions, 162 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..a72edd4ecee 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -303,6 +303,7 @@ struct iscsi_session {
 	int			cmds_max;	/* size of cmds array */
 	struct iscsi_task	**cmds;		/* Original Cmds arr */
 	struct iscsi_pool	cmdpool;	/* PDU's pool */
+	void			*dd_data;	/* LLD private data */
 };
 
 enum {
@@ -363,7 +364,7 @@ extern int iscsi_target_alloc(struct scsi_target *starget);
  */
 extern struct iscsi_cls_session *
 iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost,
-		    uint16_t, int, uint32_t, unsigned int);
+		    uint16_t, int, int, uint32_t, unsigned int);
 extern void iscsi_session_teardown(struct iscsi_cls_session *);
 extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
 extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
@@ -390,6 +391,7 @@ 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 +417,8 @@ 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.h b/include/scsi/scsi.h
index 084478e14d2..34c46ab5c31 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -129,6 +129,9 @@ struct scsi_cmnd;
 #define MI_REPORT_TARGET_PGS  0x0a
 /* values for maintenance out */
 #define MO_SET_TARGET_PGS     0x0a
+/* values for variable length command */
+#define READ_32		      0x09
+#define WRITE_32	      0x0b
 
 /* Values for T10/04-262r7 */
 #define	ATA_16		      0x85	/* 16-byte pass-thru */
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 3878d1dc7f5..a5e885a111d 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -229,10 +229,6 @@ enum scsi_prot_operations {
 	/* OS-HBA: Protected, HBA-Target: Protected */
 	SCSI_PROT_READ_PASS,
 	SCSI_PROT_WRITE_PASS,
-
-	/* OS-HBA: Protected, HBA-Target: Protected, checksum conversion */
-	SCSI_PROT_READ_CONVERT,
-	SCSI_PROT_WRITE_CONVERT,
 };
 
 static inline void scsi_set_prot_op(struct scsi_cmnd *scmd, unsigned char op)
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 3f566af3f10..f097ae340bc 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -145,6 +145,7 @@ struct scsi_device {
 	unsigned retry_hwerror:1;	/* Retry HARDWARE_ERROR */
 	unsigned last_sector_bug:1;	/* do not use multisector accesses on
 					   SD_LAST_BUGGY_SECTORS */
+	unsigned is_visible:1;	/* is the device visible in sysfs */
 
 	DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
 	struct list_head event_list;	/* asserted events */
@@ -187,10 +188,13 @@ 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
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index b62a097b3ec..47941fc5aba 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -797,24 +797,24 @@ static inline unsigned int scsi_host_get_prot(struct Scsi_Host *shost)
 
 static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsigned int target_type)
 {
-	switch (target_type) {
-	case 1: return shost->prot_capabilities & SHOST_DIF_TYPE1_PROTECTION;
-	case 2: return shost->prot_capabilities & SHOST_DIF_TYPE2_PROTECTION;
-	case 3: return shost->prot_capabilities & SHOST_DIF_TYPE3_PROTECTION;
-	}
+	static unsigned char cap[] = { 0,
+				       SHOST_DIF_TYPE1_PROTECTION,
+				       SHOST_DIF_TYPE2_PROTECTION,
+				       SHOST_DIF_TYPE3_PROTECTION };
 
-	return 0;
+	return shost->prot_capabilities & cap[target_type] ? target_type : 0;
 }
 
 static inline unsigned int scsi_host_dix_capable(struct Scsi_Host *shost, unsigned int target_type)
 {
-	switch (target_type) {
-	case 0: return shost->prot_capabilities & SHOST_DIX_TYPE0_PROTECTION;
-	case 1: return shost->prot_capabilities & SHOST_DIX_TYPE1_PROTECTION;
-	case 2: return shost->prot_capabilities & SHOST_DIX_TYPE2_PROTECTION;
-	case 3: return shost->prot_capabilities & SHOST_DIX_TYPE3_PROTECTION;
-	}
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+	static unsigned char cap[] = { SHOST_DIX_TYPE0_PROTECTION,
+				       SHOST_DIX_TYPE1_PROTECTION,
+				       SHOST_DIX_TYPE2_PROTECTION,
+				       SHOST_DIX_TYPE3_PROTECTION };
 
+	return shost->prot_capabilities & cap[target_type];
+#endif
 	return 0;
 }