Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (57 commits)
  [SCSI] fix error handling in scsi_io_completion
  [SCSI] qla1280: fix section mismatch warnings
  [SCSI] mptsas: eliminate ghost devices
  [SCSI] qla2xxx: make some more functions static
  [SCSI] small whitespace cleanup for qlogic driver
  [SCSI] mptbase: mpt_interrupt should return IRQ_NONE
  [SCSI] mptsas: make two functions static
  [SCSI] sg.c: Fix bad error handling in
  [SCSI] 53c700: fix breakage caused by the autosense update
  [SCSI] iscsi: add async notification of session events
  [SCSI] iscsi: pass target nr to session creation
  [SCSI] iscsi: break up session creation into two stages
  [SCSI] iscsi: rm channel usage from iscsi
  [SCSI] iscsi: fix session refcouting
  [SCSI] iscsi: convert iscsi_tcp to new set/get param fns
  [SCSI] iscsi: convert iser to new set/get param fns
  [SCSI] iscsi: fixup set/get param functions
  [SCSI] iscsi: add target discvery event to transport class
  [SCSI] st: remove unused st_buffer.in_use
  [SCSI] atp870u: reduce huge stack usage
  ...

6 files changed, 101 insertions, 31 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 253797c60095..55ebf035e620 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -47,10 +47,19 @@ enum iscsi_uevent_e {
         ISCSI_UEVENT_TRANSPORT_EP_POLL          = UEVENT_BASE + 13,
         ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,
 
+        ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
+
         /* up events */
         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
         ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
         ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
+        ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
+};
+
+enum iscsi_tgt_dscvr {
+        ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
+        ISCSI_TGT_DSCVR_ISNS            = 2,
+        ISCSI_TGT_DSCVR_SLP             = 3,
 };
 
 struct iscsi_uevent {
@@ -116,6 +125,17 @@ struct iscsi_uevent {
                 struct msg_transport_disconnect {
                         uint64_t        ep_handle;
                 } ep_disconnect;
+                struct msg_tgt_dscvr {
+                        enum iscsi_tgt_dscvr    type;
+                        uint32_t        host_no;
+                        /*
+                         * enable = 1 to establish a new connection
+                         * with the server. enable = 0 to disconnect
+                         * from the server. Used primarily to switch
+                         * from one iSNS server to another.
+                         */
+                        uint32_t        enable;
+                } tgt_dscvr;
         } u;
         union {
                 /* messages k -> u */
@@ -138,6 +158,10 @@ struct iscsi_uevent {
                         uint32_t        cid;
                         uint32_t        error; /* enum iscsi_err */
                 } connerror;
+                struct msg_session_destroyed {
+                        uint32_t        host_no;
+                        uint32_t        sid;
+                } d_session;
                 struct msg_transport_connect_ret {
                         uint64_t        handle;
                 } ep_connect_ret;
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index cbf7e58bd6f9..ba2760802ded 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -157,6 +157,11 @@ struct iscsi_conn {
         int                     max_xmit_dlength; /* target_max_recv_dsl */
         int                     hdrdgst_en;
         int                     datadgst_en;
+        int                     ifmarker_en;
+        int                     ofmarker_en;
+        /* values userspace uses to id a conn */
+        int                     persistent_port;
+        char                    *persistent_address;
 
         /* MIB-statistics */
         uint64_t                txdata_octets;
@@ -196,8 +201,8 @@ struct iscsi_session {
         int                     pdu_inorder_en;
         int                     dataseq_inorder_en;
         int                     erl;
-        int                     ifmarker_en;
-        int                     ofmarker_en;
+        int                     tpgt;
+        char                    *targetname;
 
         /* control data */
         struct iscsi_transport  *tt;
@@ -240,6 +245,10 @@ iscsi_session_setup(struct iscsi_transport *, struct scsi_transport_template *,
 extern void iscsi_session_teardown(struct iscsi_cls_session *);
 extern struct iscsi_session *class_to_transport_session(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,
+                           enum iscsi_param param, char *buf, int buflen);
+extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
+                                   enum iscsi_param param, char *buf);
 
 #define session_to_cls(_sess) \
         hostdata_session(_sess->host->hostdata)
@@ -255,6 +264,8 @@ extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
 extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
                            int);
 extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
+extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
+                                enum iscsi_param param, char *buf);
 
 /*
  * pdu and task processing
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index e46cd404bd7d..371f70d9aa92 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -143,7 +143,7 @@ struct scsi_cmnd {
 
 extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t);
 extern void scsi_put_command(struct scsi_cmnd *);
-extern void scsi_io_completion(struct scsi_cmnd *, unsigned int, unsigned int);
+extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
 extern void scsi_finish_command(struct scsi_cmnd *cmd);
 extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd);
 
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index a42efd6e4be8..b3dd90f3e858 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -542,6 +542,9 @@ struct Scsi_Host {
          */
         unsigned ordered_tag:1;
 
+        /* task mgmt function in progress */
+        unsigned tmf_in_progress:1;
+
         /*
          * Optional work queue to be utilized by the transport
          */
@@ -619,7 +622,8 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost)
 {
         return shost->shost_state == SHOST_RECOVERY ||
                 shost->shost_state == SHOST_CANCEL_RECOVERY ||
-                shost->shost_state == SHOST_DEL_RECOVERY;
+                shost->shost_state == SHOST_DEL_RECOVERY ||
+                shost->tmf_in_progress;
 }
 
 extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *);
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index b684426a5900..5a3df1d7085f 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -34,6 +34,7 @@ struct iscsi_cls_conn;
 struct iscsi_conn;
 struct iscsi_cmd_task;
 struct iscsi_mgmt_task;
+struct sockaddr;
 
 /**
  * struct iscsi_transport - iSCSI Transport template
@@ -46,7 +47,12 @@ struct iscsi_mgmt_task;
  * @bind_conn:          associate this connection with existing iSCSI session
  *                      and specified transport descriptor
  * @destroy_conn:       destroy inactive iSCSI connection
- * @set_param:          set iSCSI Data-Path operational parameter
+ * @set_param:          set iSCSI parameter. Return 0 on success, -ENODATA
+ *                      when param is not supported, and a -Exx value on other
+ *                      error.
+ * @get_param           get iSCSI parameter. Must return number of bytes
+ *                      copied to buffer on success, -ENODATA when param
+ *                      is not supported, and a -Exx value on other error
  * @start_conn:         set connection to be operational
  * @stop_conn:          suspend/recover/terminate connection
  * @send_pdu:           send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
@@ -97,15 +103,11 @@ struct iscsi_transport {
         void (*stop_conn) (struct iscsi_cls_conn *conn, int flag);
         void (*destroy_conn) (struct iscsi_cls_conn *conn);
         int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param,
-                          uint32_t value);
+                          char *buf, int buflen);
         int (*get_conn_param) (struct iscsi_cls_conn *conn,
-                               enum iscsi_param param, uint32_t *value);
+                               enum iscsi_param param, char *buf);
         int (*get_session_param) (struct iscsi_cls_session *session,
-                                  enum iscsi_param param, uint32_t *value);
-        int (*get_conn_str_param) (struct iscsi_cls_conn *conn,
-                                   enum iscsi_param param, char *buf);
-        int (*get_session_str_param) (struct iscsi_cls_session *session,
-                                      enum iscsi_param param, char *buf);
+                                  enum iscsi_param param, char *buf);
         int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
                          char *data, uint32_t data_size);
         void (*get_stats) (struct iscsi_cls_conn *conn,
@@ -127,6 +129,8 @@ struct iscsi_transport {
                            uint64_t *ep_handle);
         int (*ep_poll) (uint64_t ep_handle, int timeout_ms);
         void (*ep_disconnect) (uint64_t ep_handle);
+        int (*tgt_dscvr) (enum iscsi_tgt_dscvr type, uint32_t host_no,
+                          uint32_t enable, struct sockaddr *dst_addr);
 };
 
 /*
@@ -155,13 +159,6 @@ struct iscsi_cls_conn {
         struct iscsi_transport *transport;
         uint32_t cid;                   /* connection id */
 
-        /* portal/group values we got during discovery */
-        char *persistent_address;
-        int persistent_port;
-        /* portal/group values we are currently using */
-        char *address;
-        int port;
-
         int active;                     /* must be accessed with the connlock */
         struct device dev;              /* sysfs transport/container device */
         struct mempool_zone *z_error;
@@ -185,16 +182,11 @@ struct iscsi_cls_session {
         struct list_head host_list;
         struct iscsi_transport *transport;
 
-        /* iSCSI values used as unique id by userspace. */
-        char *targetname;
-        int tpgt;
-
         /* recovery fields */
         int recovery_tmo;
         struct work_struct recovery_work;
 
         int target_id;
-        int channel;
 
         int sid;                                /* session id */
         void *dd_data;                          /* LLD private data */
@@ -207,8 +199,10 @@ struct iscsi_cls_session {
 #define iscsi_session_to_shost(_session) \
         dev_to_shost(_session->dev.parent)
 
+#define starget_to_session(_stgt) \
+        iscsi_dev_to_session(_stgt->dev.parent)
+
 struct iscsi_host {
-        int next_target_id;
         struct list_head sessions;
         struct mutex mutex;
 };
@@ -216,8 +210,17 @@ struct iscsi_host {
 /*
  * session and connection functions that can be used by HW iSCSI LLDs
  */
+extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost,
+                                        struct iscsi_transport *transport);
+extern int iscsi_add_session(struct iscsi_cls_session *session,
+                             unsigned int target_id);
+extern int iscsi_if_create_session_done(struct iscsi_cls_conn *conn);
+extern int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn);
 extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
-                                struct iscsi_transport *t, int channel);
+                                                struct iscsi_transport *t,
+                                                unsigned int target_id);
+extern void iscsi_remove_session(struct iscsi_cls_session *session);
+extern void iscsi_free_session(struct iscsi_cls_session *session);
 extern int iscsi_destroy_session(struct iscsi_cls_session *session);
 extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
                                             uint32_t cid);
@@ -225,4 +228,5 @@ extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
 extern void iscsi_unblock_session(struct iscsi_cls_session *session);
 extern void iscsi_block_session(struct iscsi_cls_session *session);
 
+
 #endif
diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h
index 93cfb4bf4211..e3c503cd175e 100644
--- a/include/scsi/scsi_transport_sas.h
+++ b/include/scsi/scsi_transport_sas.h
@@ -3,6 +3,7 @@
 
 #include <linux/transport_class.h>
 #include <linux/types.h>
+#include <linux/mutex.h>
 
 struct scsi_transport_template;
 struct sas_rphy;
@@ -55,7 +56,6 @@ struct sas_phy {
         enum sas_linkrate       minimum_linkrate;
         enum sas_linkrate       maximum_linkrate_hw;
         enum sas_linkrate       maximum_linkrate;
-        u8                      port_identifier;
 
         /* internal state */
         unsigned int            local_attached : 1;
@@ -66,8 +66,8 @@ struct sas_phy {
         u32                     loss_of_dword_sync_count;
         u32                     phy_reset_problem_count;
 
-        /* the other end of the link */
-        struct sas_rphy         *rphy;
+        /* for the list of phys belonging to a port */
+        struct list_head        port_siblings;
 };
 
 #define dev_to_phy(d) \
@@ -124,6 +124,24 @@ struct sas_expander_device {
 #define rphy_to_expander_device(r) \
         container_of((r), struct sas_expander_device, rphy)
 
+struct sas_port {
+        struct device           dev;
+
+        u8                      port_identifier;
+        int                     num_phys;
+
+        /* the other end of the link */
+        struct sas_rphy         *rphy;
+
+        struct mutex            phy_list_mutex;
+        struct list_head        phy_list;
+};
+
+#define dev_to_sas_port(d) \
+        container_of((d), struct sas_port, dev)
+#define transport_class_to_sas_port(cdev) \
+        dev_to_sas_port((cdev)->dev)
+
 /* The functions by which the transport class and the driver communicate */
 struct sas_function_template {
         int (*get_linkerrors)(struct sas_phy *);
@@ -133,6 +151,7 @@ struct sas_function_template {
 };
 
 
+void sas_remove_children(struct device *);
 extern void sas_remove_host(struct Scsi_Host *);
 
 extern struct sas_phy *sas_phy_alloc(struct device *, int);
@@ -141,13 +160,21 @@ extern int sas_phy_add(struct sas_phy *);
 extern void sas_phy_delete(struct sas_phy *);
 extern int scsi_is_sas_phy(const struct device *);
 
-extern struct sas_rphy *sas_end_device_alloc(struct sas_phy *);
-extern struct sas_rphy *sas_expander_alloc(struct sas_phy *, enum sas_device_type);
+extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
+extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 void sas_rphy_free(struct sas_rphy *);
 extern int sas_rphy_add(struct sas_rphy *);
 extern void sas_rphy_delete(struct sas_rphy *);
 extern int scsi_is_sas_rphy(const struct device *);
 
+struct sas_port *sas_port_alloc(struct device *, int);
+int sas_port_add(struct sas_port *);
+void sas_port_free(struct sas_port *);
+void sas_port_delete(struct sas_port *);
+void sas_port_add_phy(struct sas_port *, struct sas_phy *);
+void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
+int scsi_is_sas_port(const struct device *);
+
 extern struct scsi_transport_template *
 sas_attach_transport(struct sas_function_template *);
 extern void sas_release_transport(struct scsi_transport_template *);