target: remove the ->transport_split_cdb callback in se_cmd
Christoph Hellwig [Wed, 12 Oct 2011 15:09:13 +0000 (11:09 -0400)]
Add a switch statement implementing the CDB LBA/len update directly
in target_get_task_cdb and remove the old ->transport_split_cdb
callback and all its implementations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/Makefile
drivers/target/target_core_cdb.c
drivers/target/target_core_scdb.c [deleted file]
drivers/target/target_core_scdb.h [deleted file]
drivers/target/target_core_transport.c
include/target/target_core_base.h

index 1060c7b..62e5405 100644 (file)
@@ -6,7 +6,6 @@ target_core_mod-y               := target_core_configfs.o \
                                   target_core_hba.o \
                                   target_core_pr.o \
                                   target_core_alua.o \
-                                  target_core_scdb.o \
                                   target_core_tmr.o \
                                   target_core_tpg.o \
                                   target_core_transport.o \
index fb0b630..575cf72 100644 (file)
@@ -1273,11 +1273,44 @@ transport_emulate_control_cdb(struct se_task *task)
 void target_get_task_cdb(struct se_task *task, unsigned char *cdb)
 {
        struct se_cmd *cmd = task->task_se_cmd;
+       unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb);
 
-       memcpy(cdb, cmd->t_task_cdb, scsi_command_size(cmd->t_task_cdb));
+       memcpy(cdb, cmd->t_task_cdb, cdb_len);
        if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
-               cmd->transport_split_cdb(task->task_lba, task->task_sectors,
-                                        cdb);
+               unsigned long long lba = task->task_lba;
+               u32 sectors = task->task_sectors;
+
+               switch (cdb_len) {
+               case 6:
+                       /* 21-bit LBA and 8-bit sectors */
+                       cdb[1] = (lba >> 16) & 0x1f;
+                       cdb[2] = (lba >> 8) & 0xff;
+                       cdb[3] = lba & 0xff;
+                       cdb[4] = sectors & 0xff;
+                       break;
+               case 10:
+                       /* 32-bit LBA and 16-bit sectors */
+                       put_unaligned_be32(lba, &cdb[2]);
+                       put_unaligned_be16(sectors, &cdb[7]);
+                       break;
+               case 12:
+                       /* 32-bit LBA and 32-bit sectors */
+                       put_unaligned_be32(lba, &cdb[2]);
+                       put_unaligned_be32(sectors, &cdb[6]);
+                       break;
+               case 16:
+                       /* 64-bit LBA and 32-bit sectors */
+                       put_unaligned_be64(lba, &cdb[2]);
+                       put_unaligned_be32(sectors, &cdb[10]);
+                       break;
+               case 32:
+                       /* 64-bit LBA and 32-bit sectors, extended CDB */
+                       put_unaligned_be64(lba, &cdb[12]);
+                       put_unaligned_be32(sectors, &cdb[28]);
+                       break;
+               default:
+                       BUG();
+               }
        }
 }
 EXPORT_SYMBOL(target_get_task_cdb);
diff --git a/drivers/target/target_core_scdb.c b/drivers/target/target_core_scdb.c
deleted file mode 100644 (file)
index 7284344..0000000
+++ /dev/null
@@ -1,105 +0,0 @@
-/*******************************************************************************
- * Filename:  target_core_scdb.c
- *
- * This file contains the generic target engine Split CDB related functions.
- *
- * Copyright (c) 2004-2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
- *
- * Nicholas A. Bellinger <nab@kernel.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- ******************************************************************************/
-
-#include <linux/net.h>
-#include <linux/string.h>
-#include <scsi/scsi.h>
-#include <asm/unaligned.h>
-
-#include <target/target_core_base.h>
-#include <target/target_core_transport.h>
-
-#include "target_core_scdb.h"
-
-/*     split_cdb_XX_6():
- *
- *      21-bit LBA w/ 8-bit SECTORS
- */
-void split_cdb_XX_6(
-       unsigned long long lba,
-       u32 sectors,
-       unsigned char *cdb)
-{
-       cdb[1] = (lba >> 16) & 0x1f;
-       cdb[2] = (lba >> 8) & 0xff;
-       cdb[3] = lba & 0xff;
-       cdb[4] = sectors & 0xff;
-}
-
-/*     split_cdb_XX_10():
- *
- *     32-bit LBA w/ 16-bit SECTORS
- */
-void split_cdb_XX_10(
-       unsigned long long lba,
-       u32 sectors,
-       unsigned char *cdb)
-{
-       put_unaligned_be32(lba, &cdb[2]);
-       put_unaligned_be16(sectors, &cdb[7]);
-}
-
-/*     split_cdb_XX_12():
- *
- *     32-bit LBA w/ 32-bit SECTORS
- */
-void split_cdb_XX_12(
-       unsigned long long lba,
-       u32 sectors,
-       unsigned char *cdb)
-{
-       put_unaligned_be32(lba, &cdb[2]);
-       put_unaligned_be32(sectors, &cdb[6]);
-}
-
-/*     split_cdb_XX_16():
- *
- *     64-bit LBA w/ 32-bit SECTORS
- */
-void split_cdb_XX_16(
-       unsigned long long lba,
-       u32 sectors,
-       unsigned char *cdb)
-{
-       put_unaligned_be64(lba, &cdb[2]);
-       put_unaligned_be32(sectors, &cdb[10]);
-}
-
-/*
- *     split_cdb_XX_32():
- *
- *     64-bit LBA w/ 32-bit SECTORS such as READ_32, WRITE_32 and emulated XDWRITEREAD_32
- */
-void split_cdb_XX_32(
-       unsigned long long lba,
-       u32 sectors,
-       unsigned char *cdb)
-{
-       put_unaligned_be64(lba, &cdb[12]);
-       put_unaligned_be32(sectors, &cdb[28]);
-}
diff --git a/drivers/target/target_core_scdb.h b/drivers/target/target_core_scdb.h
deleted file mode 100644 (file)
index 48e9ccc..0000000
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef TARGET_CORE_SCDB_H
-#define TARGET_CORE_SCDB_H
-
-extern void split_cdb_XX_6(unsigned long long, u32, unsigned char *);
-extern void split_cdb_XX_10(unsigned long long, u32, unsigned char *);
-extern void split_cdb_XX_12(unsigned long long, u32, unsigned char *);
-extern void split_cdb_XX_16(unsigned long long, u32, unsigned char *);
-extern void split_cdb_XX_32(unsigned long long, u32, unsigned char *);
-
-#endif /* TARGET_CORE_SCDB_H */
index 3025a6f..cb022a1 100644 (file)
@@ -54,7 +54,6 @@
 #include "target_core_alua.h"
 #include "target_core_hba.h"
 #include "target_core_pr.h"
-#include "target_core_scdb.h"
 #include "target_core_ua.h"
 
 static int sub_api_initialized;
@@ -2851,7 +2850,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_6;
                cmd->t_task_lba = transport_lba_21(cdb);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
                break;
@@ -2860,7 +2858,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_10;
                cmd->t_task_lba = transport_lba_32(cdb);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
                break;
@@ -2869,7 +2866,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_12;
                cmd->t_task_lba = transport_lba_32(cdb);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
                break;
@@ -2878,7 +2874,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_16;
                cmd->t_task_lba = transport_lba_64(cdb);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
                break;
@@ -2887,7 +2882,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_6;
                cmd->t_task_lba = transport_lba_21(cdb);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
                break;
@@ -2896,7 +2890,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_10;
                cmd->t_task_lba = transport_lba_32(cdb);
                cmd->t_tasks_fua = (cdb[1] & 0x8);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
@@ -2906,7 +2899,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_12;
                cmd->t_task_lba = transport_lba_32(cdb);
                cmd->t_tasks_fua = (cdb[1] & 0x8);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
@@ -2916,7 +2908,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_16;
                cmd->t_task_lba = transport_lba_64(cdb);
                cmd->t_tasks_fua = (cdb[1] & 0x8);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
@@ -2929,7 +2920,6 @@ static int transport_generic_cmd_sequencer(
                if (sector_ret)
                        goto out_unsupported_cdb;
                size = transport_get_size(sectors, cdb, cmd);
-               cmd->transport_split_cdb = &split_cdb_XX_10;
                cmd->t_task_lba = transport_lba_32(cdb);
                cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
                passthrough = (dev->transport->transport_type ==
@@ -2964,7 +2954,6 @@ static int transport_generic_cmd_sequencer(
                         * Use WRITE_32 and READ_32 opcodes for the emulated
                         * XDWRITE_READ_32 logic.
                         */
-                       cmd->transport_split_cdb = &split_cdb_XX_32;
                        cmd->t_task_lba = transport_lba_64_ext(cdb);
                        cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
 
index a6c2348..16d7a49 100644 (file)
@@ -470,7 +470,6 @@ struct se_cmd {
        struct list_head        se_queue_node;
        struct target_core_fabric_ops *se_tfo;
        int (*transport_emulate_cdb)(struct se_cmd *);
-       void (*transport_split_cdb)(unsigned long long, u32, unsigned char *);
        void (*transport_complete_callback)(struct se_cmd *);
        int (*transport_qf_callback)(struct se_cmd *);