[S390] arch/s390/kvm: Use GFP_ATOMIC when a lock is held

[safe/jmp/linux-2.6] / include / scsi / libiscsi.h

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 7360e19..ae5196a 100644 (file)
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -28,6 +28,7 @@
 #include <linux/mutex.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
+#include <linux/kfifo.h>
 #include <scsi/iscsi_proto.h>
 #include <scsi/iscsi_if.h>
 #include <scsi/scsi_transport_iscsi.h>
@@ -36,6 +37,7 @@ struct scsi_transport_template;
 struct scsi_host_template;
 struct scsi_device;
 struct Scsi_Host;
+struct scsi_target;
 struct scsi_cmnd;
 struct socket;
 struct iscsi_transport;
@@ -45,18 +47,10 @@ struct iscsi_session;
 struct iscsi_nopin;
 struct device;
 
-/* #define DEBUG_SCSI */
-#ifdef DEBUG_SCSI
-#define debug_scsi(fmt...) printk(KERN_INFO "iscsi: " fmt)
-#else
-#define debug_scsi(fmt...)
-#endif
-
 #define ISCSI_DEF_XMIT_CMDS_MAX        128     /* must be power of 2 */
 #define ISCSI_MGMT_CMDS_MAX    15
 
-#define ISCSI_DEF_CMD_PER_LUN          32
-#define ISCSI_MAX_CMD_PER_LUN          128
+#define ISCSI_DEF_CMD_PER_LUN  32
 
 /* Task Mgmt states */
 enum {
@@ -89,9 +83,12 @@ enum {
 
 
 enum {
+       ISCSI_TASK_FREE,
        ISCSI_TASK_COMPLETED,
        ISCSI_TASK_PENDING,
        ISCSI_TASK_RUNNING,
+       ISCSI_TASK_ABRT_TMF,            /* aborted due to TMF */
+       ISCSI_TASK_ABRT_SESS_RECOV,     /* aborted due to session recovery */
 };
 
 struct iscsi_r2t_info {
@@ -129,6 +126,10 @@ struct iscsi_task {
        struct scsi_cmnd        *sc;            /* associated SCSI cmd*/
        struct iscsi_conn       *conn;          /* used connection    */
 
+       /* data processing tracking */
+       unsigned long           last_xfer;
+       unsigned long           last_timeout;
+       bool                    have_checked_conn;
        /* state set/tested under session->lock */
        int                     state;
        atomic_t                refcount;
@@ -188,9 +189,7 @@ struct iscsi_conn {
 
        /* xmit */
        struct list_head        mgmtqueue;      /* mgmt (control) xmit queue */
-       struct list_head        mgmt_run_list;  /* list of control tasks */
-       struct list_head        xmitqueue;      /* data-path cmd queue */
-       struct list_head        run_list;       /* list of cmds in progress */
+       struct list_head        cmdqueue;       /* data-path cmd queue */
        struct list_head        requeue;        /* tasks needing another run */
        struct work_struct      xmitwork;       /* per-conn. xmit workqueue */
        unsigned long           suspend_tx;     /* suspend Tx */
@@ -233,7 +232,7 @@ struct iscsi_conn {
 };
 
 struct iscsi_pool {
-       struct kfifo            *queue;         /* FIFO Queue */
+       struct kfifo            queue;          /* FIFO Queue */
        void                    **pool;         /* Pool of elements */
        int                     max;            /* Max number of elements */
 };
@@ -269,6 +268,7 @@ struct iscsi_session {
        /* configuration */
        int                     abort_timeout;
        int                     lu_reset_timeout;
+       int                     tgt_reset_timeout;
        int                     initial_r2t_en;
        unsigned                max_r2t;
        int                     imm_data_en;
@@ -305,6 +305,7 @@ 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 {
@@ -326,14 +327,19 @@ struct iscsi_host {
        spinlock_t              lock;
        int                     num_sessions;
        int                     state;
+
+       struct workqueue_struct *workq;
+       char                    workq_name[20];
 };
 
 /*
  * scsi host template
  */
-extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth);
+extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth,
+                                   int reason);
 extern int iscsi_eh_abort(struct scsi_cmnd *sc);
-extern int iscsi_eh_target_reset(struct scsi_cmnd *sc);
+extern int iscsi_eh_recover_target(struct scsi_cmnd *sc);
+extern int iscsi_eh_session_reset(struct scsi_cmnd *sc);
 extern int iscsi_eh_device_reset(struct scsi_cmnd *sc);
 extern int iscsi_queuecommand(struct scsi_cmnd *sc,
                              void (*done)(struct scsi_cmnd *));
@@ -351,16 +357,18 @@ extern int iscsi_host_get_param(struct Scsi_Host *shost,
                                enum iscsi_host_param param, char *buf);
 extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev);
 extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
-                                         int dd_data_size, uint16_t qdepth);
+                                         int dd_data_size,
+                                         bool xmit_can_sleep);
 extern void iscsi_host_remove(struct Scsi_Host *shost);
 extern void iscsi_host_free(struct Scsi_Host *shost);
+extern int iscsi_target_alloc(struct scsi_target *starget);
 
 /*
  * session management
  */
 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,
@@ -382,11 +390,13 @@ 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 void iscsi_session_failure(struct iscsi_cls_session *cls_session,
+extern void iscsi_session_failure(struct iscsi_session *session,
                                  enum iscsi_err err);
 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...) \
        iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \
@@ -407,9 +417,12 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
                                char *, int);
 extern int iscsi_verify_itt(struct iscsi_conn *, itt_t);
 extern struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t);
+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