Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target updates from Nicholas Bellinger:
 "Lots of activity in target land the last months.

  The highlights include:

   - Convert fabric drivers tree-wide to target_register_template() (hch
     + bart)

   - iser-target hardening fixes + v1.0 improvements (sagi)

   - Convert iscsi_thread_set usage to kthread.h + kill
     iscsi_target_tq.c (sagi + nab)

   - Add support for T10-PI WRITE_STRIP + READ_INSERT operation (mkp +
     sagi + nab)

   - DIF fixes for CONFIG_DEBUG_SG=y + UNMAP file emulation (akinobu +
     sagi + mkp)

   - Extended TCMU ABI v2 for future BIDI + DIF support (andy + ilias)

   - Fix COMPARE_AND_WRITE handling for NO_ALLLOC drivers (hch + nab)

  Thanks to everyone who contributed this round with new features,
  bug-reports, fixes, cleanups and improvements.

  Looking forward, it's currently shaping up to be a busy v4.2 as well"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (69 commits)
  target: Put TCMU under a new config option
  target: Version 2 of TCMU ABI
  target: fix tcm_mod_builder.py
  target/file: Fix UNMAP with DIF protection support
  target/file: Fix SG table for prot_buf initialization
  target/file: Fix BUG() when CONFIG_DEBUG_SG=y and DIF protection enabled
  target: Make core_tmr_abort_task() skip TMFs
  target/sbc: Update sbc_dif_generate pr_debug output
  target/sbc: Make internal DIF emulation honor ->prot_checks
  target/sbc: Return INVALID_CDB_FIELD if DIF + sess_prot_type disabled
  target: Ensure sess_prot_type is saved across session restart
  target/rd: Don't pass incomplete scatterlist entries to sbc_dif_verify_*
  target: Remove the unused flag SCF_ACK_KREF
  target: Fix two sparse warnings
  target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling
  target: simplify the target template registration API
  target: simplify target_xcopy_init_pt_lun
  target: remove the unused SCF_CMD_XCOPY_PASSTHROUGH flag
  target/rd: reduce code duplication in rd_execute_rw()
  tcm_loop: fixup tpgt string to integer conversion
  ...

6 files changed, 78 insertions, 35 deletions

diff --git a/include/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h
index d3583d3ee193..54e7af301888 100644
--- a/include/target/iscsi/iscsi_target_core.h
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -20,6 +20,8 @@
 #define ISCSIT_MIN_TAGS                 16
 #define ISCSIT_EXTRA_TAGS               8
 #define ISCSIT_TCP_BACKLOG              256
+#define ISCSI_RX_THREAD_NAME            "iscsi_trx"
+#define ISCSI_TX_THREAD_NAME            "iscsi_ttx"
 
 /* struct iscsi_node_attrib sanity values */
 #define NA_DATAOUT_TIMEOUT              3
@@ -60,6 +62,7 @@
 #define TA_CACHE_CORE_NPS               0
 /* T10 protection information disabled by default */
 #define TA_DEFAULT_T10_PI               0
+#define TA_DEFAULT_FABRIC_PROT_TYPE     0
 
 #define ISCSI_IOV_DATA_BUFFER           5
 
@@ -600,8 +603,11 @@ struct iscsi_conn {
         struct iscsi_tpg_np     *tpg_np;
         /* Pointer to parent session */
         struct iscsi_session    *sess;
-        /* Pointer to thread_set in use for this conn's threads */
-        struct iscsi_thread_set *thread_set;
+        int                     bitmap_id;
+        int                     rx_thread_active;
+        struct task_struct      *rx_thread;
+        int                     tx_thread_active;
+        struct task_struct      *tx_thread;
         /* list_head for session connection list */
         struct list_head        conn_list;
 } ____cacheline_aligned;
@@ -767,6 +773,7 @@ struct iscsi_tpg_attrib {
         u32                     demo_mode_discovery;
         u32                     default_erl;
         u8                      t10_pi;
+        u32                     fabric_prot_type;
         struct iscsi_portal_group *tpg;
 };
 
@@ -871,10 +878,10 @@ struct iscsit_global {
         /* Unique identifier used for the authentication daemon */
         u32                     auth_id;
         u32                     inactive_ts;
-        /* Thread Set bitmap count */
-        int                     ts_bitmap_count;
+#define ISCSIT_BITMAP_BITS      262144
         /* Thread Set bitmap pointer */
         unsigned long           *ts_bitmap;
+        spinlock_t              ts_bitmap_lock;
         /* Used for iSCSI discovery session authentication */
         struct iscsi_node_acl   discovery_acl;
         struct iscsi_portal_group       *discovery_tpg;
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 672150b6aaf5..480e9f82dfea 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -165,10 +165,8 @@ enum se_cmd_flags_table {
         SCF_SEND_DELAYED_TAS            = 0x00004000,
         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
-        SCF_ACK_KREF                    = 0x00040000,
         SCF_COMPARE_AND_WRITE           = 0x00080000,
         SCF_COMPARE_AND_WRITE_POST      = 0x00100000,
-        SCF_CMD_XCOPY_PASSTHROUGH       = 0x00200000,
 };
 
 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
@@ -520,11 +518,11 @@ struct se_cmd {
         struct list_head        se_cmd_list;
         struct completion       cmd_wait_comp;
         struct kref             cmd_kref;
-        struct target_core_fabric_ops *se_tfo;
+        const struct target_core_fabric_ops *se_tfo;
         sense_reason_t          (*execute_cmd)(struct se_cmd *);
         sense_reason_t          (*execute_rw)(struct se_cmd *, struct scatterlist *,
                                               u32, enum dma_data_direction);
-        sense_reason_t (*transport_complete_callback)(struct se_cmd *);
+        sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
 
         unsigned char           *t_task_cdb;
         unsigned char           __t_task_cdb[TCM_MAX_COMMAND_SIZE];
@@ -591,6 +589,7 @@ struct se_node_acl {
         bool                    acl_stop:1;
         u32                     queue_depth;
         u32                     acl_index;
+        enum target_prot_type   saved_prot_type;
 #define MAX_ACL_TAG_SIZE 64
         char                    acl_tag[MAX_ACL_TAG_SIZE];
         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
@@ -616,6 +615,7 @@ struct se_session {
         unsigned                sess_tearing_down:1;
         u64                     sess_bin_isid;
         enum target_prot_op     sup_prot_ops;
+        enum target_prot_type   sess_prot_type;
         struct se_node_acl      *se_node_acl;
         struct se_portal_group *se_tpg;
         void                    *fabric_sess_ptr;
@@ -890,7 +890,7 @@ struct se_portal_group {
         /* List of TCM sessions associated wth this TPG */
         struct list_head        tpg_sess_list;
         /* Pointer to $FABRIC_MOD dependent code */
-        struct target_core_fabric_ops *se_tpg_tfo;
+        const struct target_core_fabric_ops *se_tpg_tfo;
         struct se_wwn           *se_tpg_wwn;
         struct config_group     tpg_group;
         struct config_group     *tpg_default_groups[7];
diff --git a/include/target/target_core_configfs.h b/include/target/target_core_configfs.h
index e0801386e4dc..25bb04c4209e 100644
--- a/include/target/target_core_configfs.h
+++ b/include/target/target_core_configfs.h
@@ -5,12 +5,6 @@
 #define TARGET_CORE_NAME_MAX_LEN        64
 #define TARGET_FABRIC_NAME_SIZE         32
 
-extern struct target_fabric_configfs *target_fabric_configfs_init(
-                                struct module *, const char *);
-extern void target_fabric_configfs_free(struct target_fabric_configfs *);
-extern int target_fabric_configfs_register(struct target_fabric_configfs *);
-extern void target_fabric_configfs_deregister(struct target_fabric_configfs *);
-
 struct target_fabric_configfs_template {
         struct config_item_type tfc_discovery_cit;
         struct config_item_type tfc_wwn_cit;
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 22a4e98eec80..17c7f5ac7ea0 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -2,6 +2,8 @@
 #define TARGET_CORE_FABRIC_H
 
 struct target_core_fabric_ops {
+        struct module *module;
+        const char *name;
         struct configfs_subsystem *tf_subsys;