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Message-ID: <4BC46D3A.1040103@vlnb.net>
Date: Tue, 13 Apr 2010 17:10:18 +0400
From: Vladislav Bolkhovitin <vst@...b.net>
To: linux-scsi@...r.kernel.org
CC: linux-kernel@...r.kernel.org,
scst-devel <scst-devel@...ts.sourceforge.net>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Andrew Morton <akpm@...ux-foundation.org>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
Jeff Garzik <jeff@...zik.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Bart Van Assche <bart.vanassche@...il.com>
Subject: Re: [PATCH][RFC 2/4/4/5] iSCSI-SCST's header files
This patch contains iSCSI-SCST's header files.
Signed-off-by: Vladislav Bolkhovitin <vst@...b.net>
---
drivers/scst/iscsi-scst/digest.h | 31 +
drivers/scst/iscsi-scst/iscsi.h | 709 ++++++++++++++++++++++++++++++++++++
drivers/scst/iscsi-scst/iscsi_dbg.h | 60 +++
drivers/scst/iscsi-scst/iscsi_hdr.h | 519 ++++++++++++++++++++++++++
include/scst/iscsi_scst.h | 207 ++++++++++
include/scst/iscsi_scst_itf_ver.h | 2
include/scst/iscsi_scst_ver.h | 18
diff -uprN orig/linux-2.6.33/include/scst/iscsi_scst.h linux-2.6.33/include/scst/iscsi_scst.h
--- orig/linux-2.6.33/include/scst/iscsi_scst.h
+++ linux-2.6.33/include/scst/iscsi_scst.h
@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2007 - 2010 Vladislav Bolkhovitin
+ * Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ * 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, version 2
+ * of the License.
+ *
+ * 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.
+ */
+
+#ifndef _ISCSI_SCST_U_H
+#define _ISCSI_SCST_U_H
+
+#ifndef __KERNEL__
+#include <sys/uio.h>
+#endif
+
+#include "iscsi_scst_ver.h"
+#include "iscsi_scst_itf_ver.h"
+
+/* The maximum length of 223 bytes in the RFC. */
+#define ISCSI_NAME_LEN 256
+
+#define ISCSI_LISTEN_PORT 3260
+
+#define SCSI_ID_LEN 24
+
+#ifndef aligned_u64
+#define aligned_u64 uint64_t __attribute__((aligned(8)))
+#endif
+
+#define ISCSI_MAX_ATTR_NAME_LEN 50
+#define ISCSI_MAX_ATTR_VALUE_LEN 512
+
+enum {
+ key_initial_r2t,
+ key_immediate_data,
+ key_max_connections,
+ key_max_recv_data_length,
+ key_max_xmit_data_length,
+ key_max_burst_length,
+ key_first_burst_length,
+ key_default_wait_time,
+ key_default_retain_time,
+ key_max_outstanding_r2t,
+ key_data_pdu_inorder,
+ key_data_sequence_inorder,
+ key_error_recovery_level,
+ key_header_digest,
+ key_data_digest,
+ key_ofmarker,
+ key_ifmarker,
+ key_ofmarkint,
+ key_ifmarkint,
+ session_key_last,
+};
+
+enum {
+ key_queued_cmnds,
+ key_rsp_timeout,
+ key_nop_in_interval,
+ key_max_sessions,
+ target_key_last,
+};
+
+enum {
+ key_session,
+ key_target,
+};
+
+struct iscsi_kern_target_info {
+ u32 tid;
+ u32 cookie;
+ char name[ISCSI_NAME_LEN];
+ u32 attrs_num;
+ aligned_u64 attrs_ptr;
+};
+
+struct iscsi_kern_session_info {
+ u32 tid;
+ aligned_u64 sid;
+ char initiator_name[ISCSI_NAME_LEN];
+ u32 exp_cmd_sn;
+ s32 session_params[session_key_last];
+ s32 target_params[target_key_last];
+};
+
+#define DIGEST_ALL (DIGEST_NONE | DIGEST_CRC32C)
+#define DIGEST_NONE (1 << 0)
+#define DIGEST_CRC32C (1 << 1)
+
+struct iscsi_kern_conn_info {
+ u32 tid;
+ aligned_u64 sid;
+
+ u32 cid;
+ u32 stat_sn;
+ u32 exp_stat_sn;
+ int fd;
+};
+
+struct iscsi_kern_attr {
+ u32 mode;
+ char name[ISCSI_MAX_ATTR_NAME_LEN];
+};
+
+struct iscsi_kern_mgmt_cmd_res_info {
+ u32 tid;
+ u32 cookie;
+ u32 req_cmd;
+ u32 result;
+ char value[ISCSI_MAX_ATTR_VALUE_LEN];
+};
+
+struct iscsi_kern_params_info {
+ u32 tid;
+ aligned_u64 sid;
+
+ u32 params_type;
+ u32 partial;
+
+ s32 session_params[session_key_last];
+ s32 target_params[target_key_last];
+};
+
+enum iscsi_kern_event_code {
+ E_ADD_TARGET,
+ E_DEL_TARGET,
+ E_MGMT_CMD,
+ E_ENABLE_TARGET,
+ E_DISABLE_TARGET,
+ E_GET_ATTR_VALUE,
+ E_SET_ATTR_VALUE,
+ E_CONN_CLOSE,
+};
+
+struct iscsi_kern_event {
+ u32 tid;
+ aligned_u64 sid;
+ u32 cid;
+ u32 code;
+ u32 cookie;
+ char target_name[ISCSI_NAME_LEN];
+ u32 param1_size;
+ u32 param2_size;
+};
+
+struct iscsi_kern_register_info {
+ union {
+ aligned_u64 version;
+ struct {
+ int max_data_seg_len;
+ int max_queued_cmds;
+ };
+ };
+};
+
+struct iscsi_kern_attr_info {
+ u32 tid;
+ u32 cookie;
+ struct iscsi_kern_attr attr;
+};
+
+#define DEFAULT_NR_QUEUED_CMNDS 32
+#define MIN_NR_QUEUED_CMNDS 1
+#define MAX_NR_QUEUED_CMNDS 256
+
+#define DEFAULT_RSP_TIMEOUT 30
+#define MIN_RSP_TIMEOUT 10
+#define MAX_RSP_TIMEOUT 65535
+
+#define DEFAULT_NOP_IN_INTERVAL 30
+#define MIN_NOP_IN_INTERVAL 0
+#define MAX_NOP_IN_INTERVAL 65535
+
+#define NETLINK_ISCSI_SCST 25
+
+#define REGISTER_USERD _IOWR('s', 0, struct iscsi_kern_register_info)
+#define ADD_TARGET _IOW('s', 1, struct iscsi_kern_target_info)
+#define DEL_TARGET _IOW('s', 2, struct iscsi_kern_target_info)
+#define ADD_SESSION _IOW('s', 3, struct iscsi_kern_session_info)
+#define DEL_SESSION _IOW('s', 4, struct iscsi_kern_session_info)
+#define ADD_CONN _IOW('s', 5, struct iscsi_kern_conn_info)
+#define DEL_CONN _IOW('s', 6, struct iscsi_kern_conn_info)
+#define ISCSI_PARAM_SET _IOW('s', 7, struct iscsi_kern_params_info)
+#define ISCSI_PARAM_GET _IOWR('s', 8, struct iscsi_kern_params_info)
+
+#define ISCSI_ATTR_ADD _IOW('s', 9, struct iscsi_kern_attr_info)
+#define ISCSI_ATTR_DEL _IOW('s', 10, struct iscsi_kern_attr_info)
+#define MGMT_CMD_CALLBACK _IOW('s', 11, struct iscsi_kern_mgmt_cmd_res_info)
+
+static inline int iscsi_is_key_internal(int key)
+{
+ switch (key) {
+ case key_max_xmit_data_length:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+#endif
diff -uprN orig/linux-2.6.33/include/scst/iscsi_scst_ver.h linux-2.6.33/include/scst/iscsi_scst_ver.h
--- orig/linux-2.6.33/include/scst/iscsi_scst_ver.h
+++ linux-2.6.33/include/scst/iscsi_scst_ver.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2007 - 2010 Vladislav Bolkhovitin
+ * Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ * 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, version 2
+ * of the License.
+ *
+ * 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.
+ */
+
+#define ISCSI_VERSION_STRING_SUFFIX
+
+#define ISCSI_VERSION_STRING "2.0.0/0.4.17r214" ISCSI_VERSION_STRING_SUFFIX
diff -uprN orig/linux-2.6.33/drivers/scst/iscsi-scst/digest.h linux-2.6.33/drivers/scst/iscsi-scst/digest.h
--- orig/linux-2.6.33/drivers/scst/iscsi-scst/digest.h
+++ linux-2.6.33/drivers/scst/iscsi-scst/digest.h
@@ -0,0 +1,31 @@
+/*
+ * iSCSI digest handling.
+ *
+ * Copyright (C) 2004 Xiranet Communications GmbH <arne.redlich@...anet.com>
+ * Copyright (C) 2007 - 2010 Vladislav Bolkhovitin
+ * Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#ifndef __ISCSI_DIGEST_H__
+#define __ISCSI_DIGEST_H__
+
+extern void digest_alg_available(int *val);
+
+extern int digest_init(struct iscsi_conn *conn);
+
+extern int digest_rx_header(struct iscsi_cmnd *cmnd);
+extern int digest_rx_data(struct iscsi_cmnd *cmnd);
+
+extern void digest_tx_header(struct iscsi_cmnd *cmnd);
+extern void digest_tx_data(struct iscsi_cmnd *cmnd);
+
+#endif /* __ISCSI_DIGEST_H__ */
diff -uprN orig/linux-2.6.33/drivers/scst/iscsi-scst/iscsi_dbg.h linux-2.6.33/drivers/scst/iscsi-scst/iscsi_dbg.h
--- orig/linux-2.6.33/drivers/scst/iscsi-scst/iscsi_dbg.h
+++ linux-2.6.33/drivers/scst/iscsi-scst/iscsi_dbg.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2007 - 2010 Vladislav Bolkhovitin
+ * Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ * 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, version 2
+ * of the License.
+ *
+ * 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.
+ */
+
+#ifndef ISCSI_DBG_H
+#define ISCSI_DBG_H
+
+#define LOG_PREFIX "iscsi-scst"
+
+#include <scst_debug.h>
+
+#define TRACE_D_WRITE 0x80000000
+#define TRACE_CONN_OC 0x40000000
+#define TRACE_D_IOV 0x20000000
+#define TRACE_D_DUMP_PDU 0x10000000
+#define TRACE_NET_PG 0x08000000
+#define TRACE_CONN_OC_DBG 0x04000000
+
+#ifdef CONFIG_SCST_DEBUG
+#define ISCSI_DEFAULT_LOG_FLAGS (TRACE_FUNCTION | TRACE_LINE | TRACE_PID | \
+ TRACE_OUT_OF_MEM | TRACE_MGMT | TRACE_MGMT_DEBUG | \
+ TRACE_MINOR | TRACE_SPECIAL | TRACE_CONN_OC)
+#else
+#define ISCSI_DEFAULT_LOG_FLAGS (TRACE_OUT_OF_MEM | TRACE_MGMT | \
+ TRACE_SPECIAL)
+#endif
+
+#ifdef CONFIG_SCST_DEBUG
+struct iscsi_pdu;
+struct iscsi_cmnd;
+extern void iscsi_dump_pdu(struct iscsi_pdu *pdu);
+extern unsigned long iscsi_get_flow_ctrl_or_mgmt_dbg_log_flag(
+ struct iscsi_cmnd *cmnd);
+#else
+#define iscsi_dump_pdu(x) do {} while (0)
+#define iscsi_get_flow_ctrl_or_mgmt_dbg_log_flag(x) do {} while (0)
+#endif
+
+#if defined(CONFIG_SCST_DEBUG) || defined(CONFIG_SCST_TRACING)
+extern unsigned long iscsi_trace_flag;
+#define trace_flag iscsi_trace_flag
+#endif
+
+#define TRACE_CONN_CLOSE(args...) TRACE_DBG_FLAG(TRACE_DEBUG|TRACE_CONN_OC, args)
+#define TRACE_CONN_CLOSE_DBG(args...) TRACE(TRACE_CONN_OC_DBG, args)
+#define TRACE_NET_PAGE(args...) TRACE_DBG_FLAG(TRACE_NET_PG, args)
+#define TRACE_WRITE(args...) TRACE_DBG_FLAG(TRACE_DEBUG|TRACE_D_WRITE, args)
+
+#endif
diff -uprN orig/linux-2.6.33/drivers/scst/iscsi-scst/iscsi.h linux-2.6.33/drivers/scst/iscsi-scst/iscsi.h
--- orig/linux-2.6.33/drivers/scst/iscsi-scst/iscsi.h
+++ linux-2.6.33/drivers/scst/iscsi-scst/iscsi.h
@@ -0,0 +1,709 @@
+/*
+ * Copyright (C) 2002 - 2003 Ardis Technolgies <roman@...istech.com>
+ * Copyright (C) 2007 - 2010 Vladislav Bolkhovitin
+ * Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ * 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, version 2
+ * of the License.
+ *
+ * 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.
+ */
+
+#ifndef __ISCSI_H__
+#define __ISCSI_H__
+
+#include <linux/pagemap.h>
+#include <linux/mm.h>
+#include <linux/net.h>
+#include <net/sock.h>
+
+#include <scst.h>
+
+#include "iscsi_hdr.h"
+#include "iscsi_scst.h"
+
+#include "iscsi_dbg.h"
+
+#define iscsi_sense_crc_error ABORTED_COMMAND, 0x47, 0x05
+#define iscsi_sense_unexpected_unsolicited_data ABORTED_COMMAND, 0x0C, 0x0C
+#define iscsi_sense_incorrect_amount_of_data ABORTED_COMMAND, 0x0C, 0x0D
+
+struct iscsi_sess_params {
+ int initial_r2t;
+ int immediate_data;
+ int max_connections;
+ unsigned int max_recv_data_length;
+ unsigned int max_xmit_data_length;
+ unsigned int max_burst_length;
+ unsigned int first_burst_length;
+ int default_wait_time;
+ int default_retain_time;
+ unsigned int max_outstanding_r2t;
+ int data_pdu_inorder;
+ int data_sequence_inorder;
+ int error_recovery_level;
+ int header_digest;
+ int data_digest;
+ int ofmarker;
+ int ifmarker;
+ int ofmarkint;
+ int ifmarkint;
+};
+
+struct iscsi_tgt_params {
+ int queued_cmnds;
+ unsigned int rsp_timeout;
+ unsigned int nop_in_interval;
+};
+
+struct network_thread_info {
+ struct task_struct *task;
+ unsigned int ready;
+};
+
+struct iscsi_target;
+struct iscsi_cmnd;
+
+struct iscsi_attr {
+ struct list_head attrs_list_entry;
+ struct kobj_attribute attr;
+ struct iscsi_target *target;
+ const char *name;
+};
+
+struct iscsi_target {
+ struct scst_tgt *scst_tgt;
+
+ struct mutex target_mutex;
+
+ struct list_head session_list; /* protected by target_mutex */
+
+ struct list_head target_list_entry;
+ u32 tid;
+
+ /* Protected by iscsi_sysfs_mutex */
+ unsigned int tgt_enabled:1;
+
+ /* Protected by target_mutex */
+ struct list_head attrs_list;
+
+ char name[ISCSI_NAME_LEN];
+};
+
+#define ISCSI_HASH_ORDER 8
+#define cmnd_hashfn(itt) hash_long((itt), ISCSI_HASH_ORDER)
+
+struct iscsi_session {
+ struct iscsi_target *target;
+ struct scst_session *scst_sess;
+
+ struct list_head pending_list; /* protected by sn_lock */
+
+ /* Unprotected, since accessed only from a single read thread */
+ u32 next_ttt;
+
+ /* Read only, if there are connection(s) */
+ struct iscsi_tgt_params tgt_params;
+ atomic_t active_cmds;
+
+ spinlock_t sn_lock;
+ u32 exp_cmd_sn; /* protected by sn_lock */
+
+ /* All 3 protected by sn_lock */
+ int tm_active;
+ u32 tm_sn;
+ struct iscsi_cmnd *tm_rsp;
+
+ /* Read only, if there are connection(s) */
+ struct iscsi_sess_params sess_params;
+
+ /*
+ * In some corner cases commands can be deleted from the hash
+ * not from the corresponding read thread. So, let's simplify
+ * errors recovery and have this lock.
+ */
+ spinlock_t cmnd_data_wait_hash_lock;
+ struct list_head cmnd_data_wait_hash[1 << ISCSI_HASH_ORDER];
+
+ struct list_head conn_list; /* protected by target_mutex */
+
+ struct list_head session_list_entry;
+
+ /* All protected by target_mutex, where necessary */
+ struct iscsi_session *sess_reinst_successor;
+ unsigned int sess_reinstating:1;
+ unsigned int sess_shutting_down:1;
+
+ /* All don't need any protection */
+ char *initiator_name;
+ u64 sid;
+};
+
+#define ISCSI_CONN_IOV_MAX (PAGE_SIZE/sizeof(struct iovec))
+
+#define ISCSI_CONN_RD_STATE_IDLE 0
+#define ISCSI_CONN_RD_STATE_IN_LIST 1
+#define ISCSI_CONN_RD_STATE_PROCESSING 2
+
+#define ISCSI_CONN_WR_STATE_IDLE 0
+#define ISCSI_CONN_WR_STATE_IN_LIST 1
+#define ISCSI_CONN_WR_STATE_SPACE_WAIT 2
+#define ISCSI_CONN_WR_STATE_PROCESSING 3
+
+struct iscsi_conn {
+ struct iscsi_session *session; /* owning session */
+
+ /* Both protected by session->sn_lock */
+ u32 stat_sn;
+ u32 exp_stat_sn;
+
+#define ISCSI_CONN_REINSTATING 1
+#define ISCSI_CONN_SHUTTINGDOWN 2
+ unsigned long conn_aflags;
+
+ spinlock_t cmd_list_lock; /* BH lock */
+
+ /* Protected by cmd_list_lock */
+ struct list_head cmd_list; /* in/outcoming pdus */
+
+ atomic_t conn_ref_cnt;
+
+ spinlock_t write_list_lock;
+ /* List of data pdus to be sent, protected by write_list_lock */
+ struct list_head write_list;
+ /* List of data pdus being sent, protected by write_list_lock */
+ struct list_head write_timeout_list;
+
+ /* Protected by write_list_lock */
+ struct timer_list rsp_timer;
+ unsigned int rsp_timeout; /* in jiffies */
+
+ /* All 2 protected by iscsi_wr_lock */
+ unsigned short wr_state;
+ unsigned short wr_space_ready:1;
+
+ struct list_head wr_list_entry;
+
+#ifdef CONFIG_SCST_EXTRACHECKS
+ struct task_struct *wr_task;
+#endif
+
+ /*
+ * All are unprotected, since accessed only from a single write
+ * thread.
+ */
+ struct iscsi_cmnd *write_cmnd;
+ struct iovec *write_iop;
+ int write_iop_used;
+ struct iovec write_iov[2];
+ u32 write_size;
+ u32 write_offset;
+ int write_state;
+
+ /* Both don't need any protection */
+ struct file *file;
+ struct socket *sock;
+
+ void (*old_state_change)(struct sock *);
+ void (*old_data_ready)(struct sock *, int);
+ void (*old_write_space)(struct sock *);
+
+ /* Both read only. Stay here for better CPU cache locality. */
+ int hdigest_type;
+ int ddigest_type;
+
+ /* All 6 protected by iscsi_rd_lock */
+ unsigned short rd_state;
+ unsigned short rd_data_ready:1;
+ /* Let's save some cache footprint by putting them here */
+ unsigned short closing:1;
+ unsigned short active_close:1;
+ unsigned short deleting:1;
+ unsigned short conn_tm_active:1;
+
+ struct list_head rd_list_entry;
+
+#ifdef CONFIG_SCST_EXTRACHECKS
+ struct task_struct *rd_task;
+#endif
+
+ unsigned long last_rcv_time;
+
+ /*
+ * All are unprotected, since accessed only from a single read
+ * thread.
+ */
+ struct iscsi_cmnd *read_cmnd;
+ struct msghdr read_msg;
+ u32 read_size;
+ int read_state;
+ struct iovec *read_iov;
+ struct task_struct *rx_task;
+ uint32_t rpadding;
+
+ struct iscsi_target *target;
+
+ struct list_head conn_list_entry; /* list entry in session conn_list */
+
+ /* All protected by target_mutex, where necessary */
+ struct iscsi_conn *conn_reinst_successor;
+ struct list_head reinst_pending_cmd_list;
+
+ wait_queue_head_t read_state_waitQ;
+ struct completion ready_to_free;
+
+ /* Doesn't need any protection */
+ u16 cid;
+
+ struct delayed_work nop_in_delayed_work;
+ unsigned int nop_in_interval; /* in jiffies */
+ struct list_head nop_req_list;
+ spinlock_t nop_req_list_lock;
+ u32 nop_in_ttt;
+
+ /* Doesn't need any protection */
+ struct kobject iscsi_conn_kobj;
+};
+
+struct iscsi_pdu {
+ struct iscsi_hdr bhs;
+ void *ahs;
+ unsigned int ahssize;
+ unsigned int datasize;
+};
+
+typedef void (iscsi_show_info_t)(struct seq_file *seq,
+ struct iscsi_target *target);
+
+/** Commands' states **/
+
+/* New command and SCST processes it */
+#define ISCSI_CMD_STATE_NEW 0
+
+/* SCST processes cmd after scst_rx_cmd() */
+#define ISCSI_CMD_STATE_RX_CMD 1
+
+/* The command returned from preprocessing_done() */
+#define ISCSI_CMD_STATE_AFTER_PREPROC 2
+
+/* The command is waiting for session or connection reinstatement finished */
+#define ISCSI_CMD_STATE_REINST_PENDING 3
+
+/* scst_restart_cmd() called and SCST processing it */
+#define ISCSI_CMD_STATE_RESTARTED 4
+
+/* SCST done processing */
+#define ISCSI_CMD_STATE_PROCESSED 5
+
+/* AEN processing */
+#define ISCSI_CMD_STATE_AEN 6
+
+/* Out of SCST core preliminary completed */
+#define ISCSI_CMD_STATE_OUT_OF_SCST_PRELIM_COMPL 7
+
+/*
+ * Most of the fields don't need any protection, since accessed from only a
+ * single thread, except where noted.
+ *
+ * ToDo: Eventually divide request and response structures in 2 separate
+ * structures and stop this IET-derived garbage.
+ */
+struct iscsi_cmnd {
+ struct iscsi_conn *conn;
+
+ /*
+ * Some flags used under conn->write_list_lock, but all modified only
+ * from single read thread or when there are no references to cmd.
+ */
+ unsigned int hashed:1;
+ unsigned int should_close_conn:1;
+ unsigned int should_close_all_conn:1;
+ unsigned int pending:1;
+ unsigned int own_sg:1;
+ unsigned int on_write_list:1;
+ unsigned int write_processing_started:1;
+ unsigned int force_cleanup_done:1;
+ unsigned int dec_active_cmnds:1;
+ unsigned int ddigest_checked:1;
+#ifdef CONFIG_SCST_EXTRACHECKS
+ unsigned int on_rx_digest_list:1;
+ unsigned int release_called:1;
+#endif
+
+ /*
+ * We suppose that preliminary commands completion is tested by
+ * comparing prelim_compl_flags with 0. Otherwise, because of the
+ * gap between setting different flags a race is possible,
+ * like sending command in SCST core as PRELIM_COMPLETED, while it
+ * wasn't aborted in it yet and have as the result a wrong success
+ * status sent to the initiator.
+ */
+#define ISCSI_CMD_ABORTED 0
+#define ISCSI_CMD_PRELIM_COMPLETED 1
+ unsigned long prelim_compl_flags;
+
+ struct list_head hash_list_entry;
+
+ /*
+ * Unions are for readability and grepability and to save some
+ * cache footprint.
+ */
+
+ union {
+ /*
+ * Used only to abort not yet sent responses. Usage in
+ * cmnd_done() is only a side effect to have a lockless
+ * accesss to this list from always only a single thread
+ * at any time. So, all responses live in the parent
+ * until it has the last reference put.
+ */
+ struct list_head rsp_cmd_list;
+ struct list_head rsp_cmd_list_entry;
+ };
+
+ union {
+ struct list_head pending_list_entry;
+ struct list_head reinst_pending_cmd_list_entry;
+ };
+
+ union {
+ struct list_head write_list_entry;
+ struct list_head write_timeout_list_entry;
+ };
+
+ /* Both protected by conn->write_list_lock */
+ unsigned int on_write_timeout_list:1;
+ unsigned long write_start;
+
+ /*
+ * All unprotected, since could be accessed from only a single
+ * thread at time
+ */
+ struct iscsi_cmnd *parent_req;
+ struct iscsi_cmnd *cmd_req;
+
+ /*
+ * All unprotected, since could be accessed from only a single
+ * thread at time
+ */
+ union {
+ /* Request only fields */
+ struct {
+ struct list_head rx_ddigest_cmd_list;
+ struct list_head rx_ddigest_cmd_list_entry;
+
+ int scst_state;
+ union {
+ struct scst_cmd *scst_cmd;
+ struct scst_aen *scst_aen;
+ };
+ unsigned int read_size;
+
+ struct iscsi_cmnd *main_rsp;
+ };
+
+ /* Response only fields */
+ struct {
+ struct scatterlist rsp_sg[2];
+ struct iscsi_sense_data sense_hdr;
+ };
+ };
+
+ atomic_t ref_cnt;
+
+ struct iscsi_pdu pdu;
+
+ struct scatterlist *sg;
+ int sg_cnt;
+ unsigned int bufflen;
+ u32 r2t_sn;
+ unsigned int r2t_len_to_receive;
+ unsigned int r2t_len_to_send;
+ unsigned int outstanding_r2t;
+ u32 target_task_tag;
+ u32 hdigest;
+ u32 ddigest;
+
+ struct list_head cmd_list_entry;
+ struct list_head nop_req_list_entry;
+};
+
+/* Max time to wait for our response satisfied for aborted commands */
+#define ISCSI_TM_DATA_WAIT_TIMEOUT (10 * HZ)
+
+/*
+ * Needed addition to all timeouts to complete a burst of commands at once.
+ * Otherwise, a part of the burst can be timeouted only in double timeout time.
+ */
+#define ISCSI_ADD_SCHED_TIME HZ
+
+#define ISCSI_CTR_OPEN_STATE_CLOSED 0
+#define ISCSI_CTR_OPEN_STATE_OPEN 1
+#define ISCSI_CTR_OPEN_STATE_CLOSING 2
+
+extern struct mutex target_mgmt_mutex;
+
+extern int ctr_open_state;
+extern const struct file_operations ctr_fops;
+
+extern spinlock_t iscsi_rd_lock;
+extern struct list_head iscsi_rd_list;
+extern wait_queue_head_t iscsi_rd_waitQ;
+
+extern spinlock_t iscsi_wr_lock;
+extern struct list_head iscsi_wr_list;
+extern wait_queue_head_t iscsi_wr_waitQ;
+
+/* iscsi.c */
+extern struct iscsi_cmnd *cmnd_alloc(struct iscsi_conn *,
+ struct iscsi_cmnd *parent);
+extern int cmnd_rx_start(struct iscsi_cmnd *);
+extern int cmnd_rx_continue(struct iscsi_cmnd *req);
+extern void cmnd_rx_end(struct iscsi_cmnd *);
+extern void cmnd_tx_start(struct iscsi_cmnd *);
+extern void cmnd_tx_end(struct iscsi_cmnd *);
+extern void req_cmnd_release_force(struct iscsi_cmnd *req);
+extern void rsp_cmnd_release(struct iscsi_cmnd *);
+extern void cmnd_done(struct iscsi_cmnd *cmnd);
+extern void conn_abort(struct iscsi_conn *conn);
+extern void iscsi_restart_cmnd(struct iscsi_cmnd *cmnd);
+extern void iscsi_fail_data_waiting_cmnd(struct iscsi_cmnd *cmnd);
+extern void iscsi_send_nop_in(struct iscsi_conn *conn);
+
+/* conn.c */
+extern struct iscsi_conn *conn_lookup(struct iscsi_session *, u16);
+extern void conn_reinst_finished(struct iscsi_conn *);
+extern int __add_conn(struct iscsi_session *, struct iscsi_kern_conn_info *);
+extern int __del_conn(struct iscsi_session *, struct iscsi_kern_conn_info *);
+extern void iscsi_make_conn_rd_active(struct iscsi_conn *conn);
+#define ISCSI_CONN_ACTIVE_CLOSE 1
+#define ISCSI_CONN_DELETING 2
+extern void __mark_conn_closed(struct iscsi_conn *, int);
+extern void mark_conn_closed(struct iscsi_conn *);
+extern void iscsi_make_conn_wr_active(struct iscsi_conn *);
+extern void iscsi_check_tm_data_wait_timeouts(struct iscsi_conn *conn,
+ bool force);
+
+/* nthread.c */
+extern int iscsi_send(struct iscsi_conn *conn);
+extern int istrd(void *arg);
+extern int istwr(void *arg);
+extern void iscsi_task_mgmt_affected_cmds_done(struct scst_mgmt_cmd *scst_mcmd);
+extern void req_add_to_write_timeout_list(struct iscsi_cmnd *req);
+
+/* target.c */
+extern const struct attribute *iscsi_tgt_attrs[];
+extern int iscsi_enable_target(struct scst_tgt *scst_tgt, bool enable);
+extern bool iscsi_is_target_enabled(struct scst_tgt *scst_tgt);
+extern ssize_t iscsi_sysfs_send_event(uint32_t tid,
+ enum iscsi_kern_event_code code,
+ const char *param1, const char *param2, void **data);
+extern struct iscsi_target *target_lookup_by_id(u32);
+extern int __add_target(struct iscsi_kern_target_info *);
+extern int __del_target(u32 id);
+extern ssize_t iscsi_sysfs_add_target(const char *target_name, char *params);
+extern ssize_t iscsi_sysfs_del_target(const char *target_name);
+extern ssize_t iscsi_sysfs_mgmt_cmd(char *cmd);
+extern void target_del_session(struct iscsi_target *target,
+ struct iscsi_session *session, int flags);
+extern void target_del_all_sess(struct iscsi_target *target, int flags);
+extern void target_del_all(void);
+
+/* config.c */
+extern const struct attribute *iscsi_attrs[];
+extern int iscsi_add_attr(struct iscsi_target *target,
+ const struct iscsi_kern_attr *user_info);
+extern void __iscsi_del_attr(struct iscsi_target *target,
+ struct iscsi_attr *tgt_attr);
+
+/* session.c */
+extern const struct attribute *iscsi_sess_attrs[];
+extern const struct file_operations session_seq_fops;
+extern struct iscsi_session *session_lookup(struct iscsi_target *, u64);
+extern void sess_reinst_finished(struct iscsi_session *);
+extern int __add_session(struct iscsi_target *,
+ struct iscsi_kern_session_info *);
+extern int __del_session(struct iscsi_target *, u64);
+extern int session_free(struct iscsi_session *session, bool del);
+
+/* params.c */
+extern const char *iscsi_get_digest_name(int val, char *res);
+extern const char *iscsi_get_bool_value(int val);
+extern int iscsi_params_set(struct iscsi_target *,
+ struct iscsi_kern_params_info *, int);
+
+/* event.c */
+extern int event_send(u32, u64, u32, u32, enum iscsi_kern_event_code,
+ const char *param1, const char *param2);
+extern int event_init(void);
+extern void event_exit(void);
+
+#define get_pgcnt(size, offset) \
+ ((((size) + ((offset) & ~PAGE_MASK)) + PAGE_SIZE - 1) >> PAGE_SHIFT)
+
+static inline void iscsi_cmnd_get_length(struct iscsi_pdu *pdu)
+{
+#if defined(__BIG_ENDIAN)
+ pdu->ahssize = pdu->bhs.length.ahslength * 4;
+ pdu->datasize = pdu->bhs.length.datalength;
+#elif defined(__LITTLE_ENDIAN)
+ pdu->ahssize = (pdu->bhs.length & 0xff) * 4;
+ pdu->datasize = be32_to_cpu(pdu->bhs.length & ~0xff);
+#else
+#error
+#endif
+}
+
+static inline void iscsi_cmnd_set_length(struct iscsi_pdu *pdu)
+{
+#if defined(__BIG_ENDIAN)
+ pdu->bhs.length.ahslength = pdu->ahssize / 4;
+ pdu->bhs.length.datalength = pdu->datasize;
+#elif defined(__LITTLE_ENDIAN)
+ pdu->bhs.length = cpu_to_be32(pdu->datasize) | (pdu->ahssize / 4);
+#else
+#error
+#endif
+}
+
+extern struct scst_tgt_template iscsi_template;
+
+/*
+ * Skip this command if result is not 0. Must be called under
+ * corresponding lock.
+ */
+static inline bool cmnd_get_check(struct iscsi_cmnd *cmnd)
+{
+ int r = atomic_inc_return(&cmnd->ref_cnt);
+ int res;
+ if (unlikely(r == 1)) {
+ TRACE_DBG("cmnd %p is being destroyed", cmnd);
+ atomic_dec(&cmnd->ref_cnt);
+ res = 1;
+ /* Necessary code is serialized by locks in cmnd_done() */
+ } else {
+ TRACE_DBG("cmnd %p, new ref_cnt %d", cmnd,
+ atomic_read(&cmnd->ref_cnt));
+ res = 0;
+ }
+ return res;
+}
+
+static inline void cmnd_get(struct iscsi_cmnd *cmnd)
+{
+ atomic_inc(&cmnd->ref_cnt);
+ TRACE_DBG("cmnd %p, new cmnd->ref_cnt %d", cmnd,
+ atomic_read(&cmnd->ref_cnt));
+}
+
+static inline void cmnd_get_ordered(struct iscsi_cmnd *cmnd)
+{
+ cmnd_get(cmnd);
+ /* See comments for each cmnd_get_ordered() use */
+ smp_mb__after_atomic_inc();
+}
+
+static inline void cmnd_put(struct iscsi_cmnd *cmnd)
+{
+ TRACE_DBG("cmnd %p, new ref_cnt %d", cmnd,
+ atomic_read(&cmnd->ref_cnt)-1);
+
+ EXTRACHECKS_BUG_ON(atomic_read(&cmnd->ref_cnt) == 0);
+
+ if (atomic_dec_and_test(&cmnd->ref_cnt))
+ cmnd_done(cmnd);
+}
+
+/* conn->write_list_lock supposed to be locked and BHs off */
+static inline void cmd_add_on_write_list(struct iscsi_conn *conn,
+ struct iscsi_cmnd *cmnd)
+{
+ TRACE_DBG("cmnd %p", cmnd);
+ /* See comment in iscsi_restart_cmnd() */
+ EXTRACHECKS_BUG_ON(cmnd->parent_req->hashed &&
+ (cmnd_opcode(cmnd) != ISCSI_OP_R2T));
+ list_add_tail(&cmnd->write_list_entry, &conn->write_list);
+ cmnd->on_write_list = 1;
+}
+
+/* conn->write_list_lock supposed to be locked and BHs off */
+static inline void cmd_del_from_write_list(struct iscsi_cmnd *cmnd)
+{
+ TRACE_DBG("%p", cmnd);
+ list_del(&cmnd->write_list_entry);
+ cmnd->on_write_list = 0;
+}
+
+static inline void cmd_add_on_rx_ddigest_list(struct iscsi_cmnd *req,
+ struct iscsi_cmnd *cmnd)
+{
+ TRACE_DBG("Adding RX ddigest cmd %p to digest list "
+ "of req %p", cmnd, req);
+ list_add_tail(&cmnd->rx_ddigest_cmd_list_entry,
+ &req->rx_ddigest_cmd_list);
+#ifdef CONFIG_SCST_EXTRACHECKS
+ cmnd->on_rx_digest_list = 1;
+#endif
+}
+
+static inline void cmd_del_from_rx_ddigest_list(struct iscsi_cmnd *cmnd)
+{
+ TRACE_DBG("Deleting RX digest cmd %p from digest list", cmnd);
+ list_del(&cmnd->rx_ddigest_cmd_list_entry);
+#ifdef CONFIG_SCST_EXTRACHECKS
+ cmnd->on_rx_digest_list = 0;
+#endif
+}
+
+static inline int test_write_ready(struct iscsi_conn *conn)
+{
+ /*
+ * No need for write_list protection, in the worst case we will be
+ * restarted again.
+ */
+ return !list_empty(&conn->write_list) || conn->write_cmnd;
+}
+
+static inline void conn_get(struct iscsi_conn *conn)
+{
+ atomic_inc(&conn->conn_ref_cnt);
+ TRACE_DBG("conn %p, new conn_ref_cnt %d", conn,
+ atomic_read(&conn->conn_ref_cnt));
+}
+
+static inline void conn_get_ordered(struct iscsi_conn *conn)
+{
+ conn_get(conn);
+ /* See comments for each conn_get_ordered() use */
+ smp_mb__after_atomic_inc();
+}
+
+static inline void conn_put(struct iscsi_conn *conn)
+{
+ TRACE_DBG("conn %p, new conn_ref_cnt %d", conn,
+ atomic_read(&conn->conn_ref_cnt)-1);
+ BUG_ON(atomic_read(&conn->conn_ref_cnt) == 0);
+
+ /*
+ * Make it always ordered to protect from undesired side effects like
+ * accessing just destroyed by close_conn() conn caused by reordering
+ * of this atomic_dec().
+ */
+ smp_mb__before_atomic_dec();
+ atomic_dec(&conn->conn_ref_cnt);
+}
+
+#ifdef CONFIG_SCST_EXTRACHECKS
+extern void iscsi_extracheck_is_rd_thread(struct iscsi_conn *conn);
+extern void iscsi_extracheck_is_wr_thread(struct iscsi_conn *conn);
+#else
+static inline void iscsi_extracheck_is_rd_thread(struct iscsi_conn *conn) {}
+static inline void iscsi_extracheck_is_wr_thread(struct iscsi_conn *conn) {}
+#endif
+
+#endif /* __ISCSI_H__ */
diff -uprN orig/linux-2.6.33/drivers/scst/iscsi-scst/iscsi_hdr.h linux-2.6.33/drivers/scst/iscsi-scst/iscsi_hdr.h
--- orig/linux-2.6.33/drivers/scst/iscsi-scst/iscsi_hdr.h
+++ linux-2.6.33/drivers/scst/iscsi-scst/iscsi_hdr.h
@@ -0,0 +1,519 @@
+/*
+ * Copyright (C) 2002 - 2003 Ardis Technolgies <roman@...istech.com>
+ * Copyright (C) 2007 - 2010 Vladislav Bolkhovitin
+ * Copyright (C) 2007 - 2010 ID7 Ltd.
+ *
+ * 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, version 2
+ * of the License.
+ *
+ * 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.
+ */
+
+#ifndef __ISCSI_HDR_H__
+#define __ISCSI_HDR_H__
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#define ISCSI_VERSION 0
+
+#ifndef __packed
+#define __packed __attribute__ ((packed))
+#endif
+
+struct iscsi_hdr {
+ u8 opcode; /* 0 */
+ u8 flags;
+ u8 spec1[2];
+#if defined(__BIG_ENDIAN_BITFIELD)
+ struct { /* 4 */
+ unsigned ahslength:8;
+ unsigned datalength:24;
+ } length;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ u32 length; /* 4 */
+#endif
+ u64 lun; /* 8 */
+ u32 itt; /* 16 */
+ u32 ttt; /* 20 */
+ u32 sn; /* 24 */
+ u32 exp_sn; /* 28 */
+ u32 max_sn; /* 32 */
+ u32 spec3[3]; /* 36 */
+} __packed; /* 48 */
+
+/* Opcode encoding bits */
+#define ISCSI_OP_RETRY 0x80
+#define ISCSI_OP_IMMEDIATE 0x40
+#define ISCSI_OPCODE_MASK 0x3F
+
+/* Client to Server Message Opcode values */
+#define ISCSI_OP_NOP_OUT 0x00
+#define ISCSI_OP_SCSI_CMD 0x01
+#define ISCSI_OP_SCSI_TASK_MGT_MSG 0x02
+#define ISCSI_OP_LOGIN_CMD 0x03
+#define ISCSI_OP_TEXT_CMD 0x04
+#define ISCSI_OP_SCSI_DATA_OUT 0x05
+#define ISCSI_OP_LOGOUT_CMD 0x06
+#define ISCSI_OP_SNACK_CMD 0x10
+
+/* Server to Client Message Opcode values */
+#define ISCSI_OP_NOP_IN 0x20
+#define ISCSI_OP_SCSI_RSP 0x21
+#define ISCSI_OP_SCSI_TASK_MGT_RSP 0x22
+#define ISCSI_OP_LOGIN_RSP 0x23
+#define ISCSI_OP_TEXT_RSP 0x24
+#define ISCSI_OP_SCSI_DATA_IN 0x25
+#define ISCSI_OP_LOGOUT_RSP 0x26
+#define ISCSI_OP_R2T 0x31
+#define ISCSI_OP_ASYNC_MSG 0x32
+#define ISCSI_OP_REJECT 0x3f
+
+struct iscsi_ahs_hdr {
+ u16 ahslength;
+ u8 ahstype;
+} __packed;
+
+#define ISCSI_AHSTYPE_CDB 1
+#define ISCSI_AHSTYPE_RLENGTH 2
+
+union iscsi_sid {
+ struct {
+ u8 isid[6]; /* Initiator Session ID */
+ u16 tsih; /* Target Session ID */
+ } id;
+ u64 id64;
+} __packed;
+
+struct iscsi_scsi_cmd_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 itt;
+ u32 data_length;
+ u32 cmd_sn;
+ u32 exp_stat_sn;
+ u8 scb[16];
+} __packed;
+
+#define ISCSI_CMD_FINAL 0x80
+#define ISCSI_CMD_READ 0x40
+#define ISCSI_CMD_WRITE 0x20
+#define ISCSI_CMD_ATTR_MASK 0x07
+#define ISCSI_CMD_UNTAGGED 0x00
+#define ISCSI_CMD_SIMPLE 0x01
+#define ISCSI_CMD_ORDERED 0x02
+#define ISCSI_CMD_HEAD_OF_QUEUE 0x03
+#define ISCSI_CMD_ACA 0x04
+
+struct iscsi_cdb_ahdr {
+ u16 ahslength;
+ u8 ahstype;
+ u8 reserved;
+ u8 cdb[0];
+} __packed;
+
+struct iscsi_rlength_ahdr {
+ u16 ahslength;
+ u8 ahstype;
+ u8 reserved;
+ u32 read_length;
+} __packed;
+
+struct iscsi_scsi_rsp_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 response;
+ u8 cmd_status;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd1[2];
+ u32 itt;
+ u32 snack;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 exp_data_sn;
+ u32 bi_residual_count;
+ u32 residual_count;
+} __packed;
+
+#define ISCSI_FLG_RESIDUAL_UNDERFLOW 0x02
+#define ISCSI_FLG_RESIDUAL_OVERFLOW 0x04
+#define ISCSI_FLG_BIRESIDUAL_UNDERFLOW 0x08
+#define ISCSI_FLG_BIRESIDUAL_OVERFLOW 0x10
+
+#define ISCSI_RESPONSE_COMMAND_COMPLETED 0x00
+#define ISCSI_RESPONSE_TARGET_FAILURE 0x01
+
+struct iscsi_sense_data {
+ u16 length;
+ u8 data[0];
+} __packed;
+
+struct iscsi_task_mgt_hdr {
+ u8 opcode;
+ u8 function;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 itt;
+ u32 rtt;
+ u32 cmd_sn;
+ u32 exp_stat_sn;
+ u32 ref_cmd_sn;
+ u32 exp_data_sn;
+ u32 rsvd2[2];
+} __packed;
+
+#define ISCSI_FUNCTION_MASK 0x7f
+
+#define ISCSI_FUNCTION_ABORT_TASK 1
+#define ISCSI_FUNCTION_ABORT_TASK_SET 2
+#define ISCSI_FUNCTION_CLEAR_ACA 3
+#define ISCSI_FUNCTION_CLEAR_TASK_SET 4
+#define ISCSI_FUNCTION_LOGICAL_UNIT_RESET 5
+#define ISCSI_FUNCTION_TARGET_WARM_RESET 6
+#define ISCSI_FUNCTION_TARGET_COLD_RESET 7
+#define ISCSI_FUNCTION_TASK_REASSIGN 8
+
+struct iscsi_task_rsp_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 response;
+ u8 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u32 rsvd3;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 rsvd4[3];
+} __packed;
+
+#define ISCSI_RESPONSE_FUNCTION_COMPLETE 0
+#define ISCSI_RESPONSE_UNKNOWN_TASK 1
+#define ISCSI_RESPONSE_UNKNOWN_LUN 2
+#define ISCSI_RESPONSE_TASK_ALLEGIANT 3
+#define ISCSI_RESPONSE_ALLEGIANCE_REASSIGNMENT_UNSUPPORTED 4
+#define ISCSI_RESPONSE_FUNCTION_UNSUPPORTED 5
+#define ISCSI_RESPONSE_NO_AUTHORIZATION 6
+#define ISCSI_RESPONSE_FUNCTION_REJECTED 255
+
+struct iscsi_data_out_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 itt;
+ u32 ttt;
+ u32 rsvd2;
+ u32 exp_stat_sn;
+ u32 rsvd3;
+ u32 data_sn;
+ u32 buffer_offset;
+ u32 rsvd4;
+} __packed;
+
+struct iscsi_data_in_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 rsvd1;
+ u8 cmd_status;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u32 ttt;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 data_sn;
+ u32 buffer_offset;
+ u32 residual_count;
+} __packed;
+
+#define ISCSI_FLG_STATUS 0x01
+
+struct iscsi_r2t_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 itt;
+ u32 ttt;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 r2t_sn;
+ u32 buffer_offset;
+ u32 data_length;
+} __packed;
+
+struct iscsi_async_msg_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 ffffffff;
+ u32 rsvd2;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u8 async_event;
+ u8 async_vcode;
+ u16 param1;
+ u16 param2;
+ u16 param3;
+ u32 rsvd3;
+} __packed;
+
+#define ISCSI_ASYNC_SCSI 0
+#define ISCSI_ASYNC_LOGOUT 1
+#define ISCSI_ASYNC_DROP_CONNECTION 2
+#define ISCSI_ASYNC_DROP_SESSION 3
+#define ISCSI_ASYNC_PARAM_REQUEST 4
+#define ISCSI_ASYNC_VENDOR 255
+
+struct iscsi_text_req_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u32 ttt;
+ u32 cmd_sn;
+ u32 exp_stat_sn;
+ u32 rsvd3[4];
+} __packed;
+
+struct iscsi_text_rsp_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u32 ttt;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 rsvd3[3];
+} __packed;
+
+struct iscsi_login_req_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 max_version; /* Max. version supported */
+ u8 min_version; /* Min. version supported */
+ u8 ahslength;
+ u8 datalength[3];
+ union iscsi_sid sid;
+ u32 itt; /* Initiator Task Tag */
+ u16 cid; /* Connection ID */
+ u16 rsvd1;
+ u32 cmd_sn;
+ u32 exp_stat_sn;
+ u32 rsvd2[4];
+} __packed;
+
+struct iscsi_login_rsp_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 max_version; /* Max. version supported */
+ u8 active_version; /* Active version */
+ u8 ahslength;
+ u8 datalength[3];
+ union iscsi_sid sid;
+ u32 itt; /* Initiator Task Tag */
+ u32 rsvd1;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u8 status_class; /* see Login RSP Status classes below */
+ u8 status_detail; /* see Login RSP Status details below */
+ u8 rsvd2[10];
+} __packed;
+
+#define ISCSI_FLG_FINAL 0x80
+#define ISCSI_FLG_TRANSIT 0x80
+#define ISCSI_FLG_CSG_SECURITY 0x00
+#define ISCSI_FLG_CSG_LOGIN 0x04
+#define ISCSI_FLG_CSG_FULL_FEATURE 0x0c
+#define ISCSI_FLG_CSG_MASK 0x0c
+#define ISCSI_FLG_NSG_SECURITY 0x00
+#define ISCSI_FLG_NSG_LOGIN 0x01
+#define ISCSI_FLG_NSG_FULL_FEATURE 0x03
+#define ISCSI_FLG_NSG_MASK 0x03
+
+/* Login Status response classes */
+#define ISCSI_STATUS_SUCCESS 0x00
+#define ISCSI_STATUS_REDIRECT 0x01
+#define ISCSI_STATUS_INITIATOR_ERR 0x02
+#define ISCSI_STATUS_TARGET_ERR 0x03
+
+/* Login Status response detail codes */
+/* Class-0 (Success) */
+#define ISCSI_STATUS_ACCEPT 0x00
+
+/* Class-1 (Redirection) */
+#define ISCSI_STATUS_TGT_MOVED_TEMP 0x01
+#define ISCSI_STATUS_TGT_MOVED_PERM 0x02
+
+/* Class-2 (Initiator Error) */
+#define ISCSI_STATUS_INIT_ERR 0x00
+#define ISCSI_STATUS_AUTH_FAILED 0x01
+#define ISCSI_STATUS_TGT_FORBIDDEN 0x02
+#define ISCSI_STATUS_TGT_NOT_FOUND 0x03
+#define ISCSI_STATUS_TGT_REMOVED 0x04
+#define ISCSI_STATUS_NO_VERSION 0x05
+#define ISCSI_STATUS_TOO_MANY_CONN 0x06
+#define ISCSI_STATUS_MISSING_FIELDS 0x07
+#define ISCSI_STATUS_CONN_ADD_FAILED 0x08
+#define ISCSI_STATUS_INV_SESSION_TYPE 0x09
+#define ISCSI_STATUS_SESSION_NOT_FOUND 0x0a
+#define ISCSI_STATUS_INV_REQ_TYPE 0x0b
+
+/* Class-3 (Target Error) */
+#define ISCSI_STATUS_TARGET_ERROR 0x00
+#define ISCSI_STATUS_SVC_UNAVAILABLE 0x01
+#define ISCSI_STATUS_NO_RESOURCES 0x02
+
+struct iscsi_logout_req_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u16 cid;
+ u16 rsvd3;
+ u32 cmd_sn;
+ u32 exp_stat_sn;
+ u32 rsvd4[4];
+} __packed;
+
+struct iscsi_logout_rsp_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 response;
+ u8 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u32 rsvd3;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 rsvd4;
+ u16 time2wait;
+ u16 time2retain;
+ u32 rsvd5;
+} __packed;
+
+struct iscsi_snack_req_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 itt;
+ u32 ttt;
+ u32 rsvd3;
+ u32 exp_stat_sn;
+ u32 rsvd4[2];
+ u32 beg_run;
+ u32 run_length;
+} __packed;
+
+struct iscsi_reject_hdr {
+ u8 opcode;
+ u8 flags;
+ u8 reason;
+ u8 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u32 rsvd2[2];
+ u32 ffffffff;
+ u32 rsvd3;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 data_sn;
+ u32 rsvd4[2];
+} __packed;
+
+#define ISCSI_REASON_RESERVED 0x01
+#define ISCSI_REASON_DATA_DIGEST_ERROR 0x02
+#define ISCSI_REASON_DATA_SNACK_REJECT 0x03
+#define ISCSI_REASON_PROTOCOL_ERROR 0x04
+#define ISCSI_REASON_UNSUPPORTED_COMMAND 0x05
+#define ISCSI_REASON_IMMEDIATE_COMMAND_REJECT 0x06
+#define ISCSI_REASON_TASK_IN_PROGRESS 0x07
+#define ISCSI_REASON_INVALID_DATA_ACK 0x08
+#define ISCSI_REASON_INVALID_PDU_FIELD 0x09
+#define ISCSI_REASON_OUT_OF_RESOURCES 0x0a
+#define ISCSI_REASON_NEGOTIATION_RESET 0x0b
+#define ISCSI_REASON_WAITING_LOGOUT 0x0c
+
+struct iscsi_nop_out_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 itt;
+ u32 ttt;
+ u32 cmd_sn;
+ u32 exp_stat_sn;
+ u32 rsvd2[4];
+} __packed;
+
+struct iscsi_nop_in_hdr {
+ u8 opcode;
+ u8 flags;
+ u16 rsvd1;
+ u8 ahslength;
+ u8 datalength[3];
+ u64 lun;
+ u32 itt;
+ u32 ttt;
+ u32 stat_sn;
+ u32 exp_cmd_sn;
+ u32 max_cmd_sn;
+ u32 rsvd2[3];
+} __packed;
+
+#define ISCSI_RESERVED_TAG (0xffffffffU)
+
+#define cmnd_hdr(cmnd) ((struct iscsi_scsi_cmd_hdr *) (&((cmnd)->pdu.bhs)))
+#define cmnd_itt(cmnd) cpu_to_be32((cmnd)->pdu.bhs.itt)
+#define cmnd_ttt(cmnd) cpu_to_be32((cmnd)->pdu.bhs.ttt)
+#define cmnd_opcode(cmnd) ((cmnd)->pdu.bhs.opcode & ISCSI_OPCODE_MASK)
+#define cmnd_scsicode(cmnd) (cmnd_hdr((cmnd))->scb[0])
+
+#endif /* __ISCSI_HDR_H__ */
diff -uprN orig/linux-2.6.33/include/scst/iscsi_scst_itf_ver.h linux-2.6.33/include/scst/iscsi_scst_itf_ver.h
--- orig/linux-2.6.33/include/scst/iscsi_scst_itf_ver.h
+++ linux-2.6.33/include/scst/iscsi_scst_itf_ver.h
@@ -0,0 +1,2 @@
+#define ISCSI_SCST_INTERFACE_VERSION "0b9736e7abc6440bb842a800ec0552ae5388b0ef"
+
--
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