iscsi_init.h

iscsi-init LINUX boot

/*
 * iSCSI boot initialization module for Linux
 * maintained by Igor Feoktistov <[e-mail]>
 *
 * 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.
 *
 */

#define PROC_BLOCK_SIZE (PAGE_SIZE - 1024)

/* Define the friendly delay before and after opening net devices */
#define CONF_PRE_OPEN		(HZ/2)	/* Before opening: 1/2 second */
#define CONF_POST_OPEN		(2*HZ)	/* After opening: 2 seconds */

/* Define the timeout for waiting for a DHCP reply */
#define CONF_OPEN_RETRIES 	2	/* (Re)open devices twice */
#define CONF_SEND_RETRIES 	6	/* Send six requests per open */
#define CONF_INTER_TIMEOUT	(HZ/2)	/* Inter-device timeout: 1/2 second */
#define CONF_BASE_TIMEOUT	(HZ*2)	/* Initial timeout: 2 seconds */
#define CONF_TIMEOUT_RANDOM	(HZ)	/* Maximum amount of randomization */
#define CONF_TIMEOUT_MULT	*7/4	/* Rate of timeout growth */
#define CONF_TIMEOUT_MAX	(HZ*30)	/* Maximum allowed timeout */
#define CONF_NAMESERVERS_MAX	5       /* Maximum number of nameservers */

struct iscsi_interface {
    struct iscsi_interface *next;
    struct net_device *dev;
    u32 servaddr;
    u32 if_addr;
    u32 if_netmask;
    u32 gateway;
    int bootp_got_reply;
    int bootp_msgtype;
    char *if_name;
    char host[__NEW_UTS_LEN];
    char domain[64];
    char nisdomain[__NEW_UTS_LEN];
    u32 nameservers[CONF_NAMESERVERS_MAX];
    char *root_path;
};

struct iscsi_device {
    struct iscsi_device *next;
    struct net_device *dev;
    struct iscsi_interface *iscsi_if;
    unsigned short flags;
    u32 xid;
};

struct iscsi_target {
    struct iscsi_target *next;
    char *target_if;
    char *target_ip;
    char *target_name;
};

struct iscsi_param {
    struct iscsi_param *next;
    char *name;
    char *value;
};

/* supported iscsi.conf parameters */
#define ISCSI_CFG_USERNAME		"Username"
#define ISCSI_CFG_INCOMINGUSERNAME	"IncomingUsername"
#define ISCSI_CFG_PASSWORD		"Password"
#define ISCSI_CFG_INCOMINGPASSWORD	"IncomingPassword"
#define ISCSI_CFG_OUTGOINGUSERNAME	"OutgoingUsername"
#define ISCSI_CFG_OUTGOINGPASSWORD	"OutgoingPassword"
#define ISCSI_CFG_HEADERDIGEST		"HeaderDigest"
#define ISCSI_CFG_DATADIGEST		"DataDigest"
#define ISCSI_CFG_LOGINTIMEOUT		"LoginTimeout"
#define ISCSI_CFG_AUTHTIMEOUT		"AuthTimeout"
#define ISCSI_CFG_IDLETIMEOUT		"IdleTimeout"
#define ISCSI_CFG_CONNFAILTIMEOUT	"ConnFailTimeout"
#define ISCSI_CFG_PINGTIMEOUT		"PingTimeout"
#define ISCSI_CFG_INITIALR2T		"InitialR2T"
#define ISCSI_CFG_IMMEDIATEDATA		"ImmediateData"
#define ISCSI_CFG_MAXRECVDATASEGLEN	"MaxRecvDataSegmentLength"
#define ISCSI_CFG_FIRSTBURSTLENGTH	"FirstBurstLength"
#define ISCSI_CFG_MAXFURSTLENGTH	"MaxBurstLength"
#define ISCSI_CFG_TCPWINSIZE		"TCPWindowSize"

/* Linux iSCSI module related stuff */

#define TARGET_NAME_MAXLEN	255
#define AUTH_STR_MAX_LEN	256
#define ISCSI_MAX_TARGETS	256

#define ISCSI_DEVICE "/dev/iscsictl"
#define ISCSI_IOCTL_DEV "iscsictl"

#define ISCSI_CONFIG_FILE "/etc/iscsi.conf"

#define ISCSI_DEFAULT_PORT 3260

#define DRIVER_ISID_0  0x00
#define DRIVER_ISID_1  0x02
#define DRIVER_ISID_2  0x3D

#define ISCSI_DIGEST_NONE  0
#define ISCSI_DIGEST_CRC32C 1
#define ISCSI_DIGEST_CRC32C_NONE 2 /* offer both, prefer CRC32C */
#define ISCSI_DIGEST_NONE_CRC32C 3 /* offer both, prefer None */

#define ISCSI_SESSION_IOCTL_VERSION 25

#define PORTAL_GROUP_TAG_UNKNOWN -1

#define ISCSI_EST_SESS_CMD 0
#define ISCSI_IOCTL 0xbc
#define ISCSI_ESTABLISH_SESSION _IOW(ISCSI_IOCTL, ISCSI_EST_SESS_CMD, struct iscsi_session_ioctl)

typedef uint8_t  UINT8;
typedef uint16_t UINT16;
typedef uint32_t UINT32;

struct iscsi_portal_info {
    int login_timeout;
    int auth_timeout;
    int active_timeout;
    int idle_timeout;
    int ping_timeout;
    int abort_timeout;
    int reset_timeout;
    int replacement_timeout;
    int initial_r2t;
    int immediate_data;
    int max_recv_data_segment_len;
    int first_burst_len;
    int max_burst_len;
    int def_time2wait;
    int def_time2retain;
    int header_digest;
    int data_digest;
    int tag;
    int tcp_window_size;
    int type_of_service;
    struct sockaddr addr;
};

struct iscsi_session_ioctl {
    uint32_t ioctl_version;
    uint32_t config_number;
    int update;
    uint8_t isid[6];
    int password_length;
    char username[AUTH_STR_MAX_LEN];
    unsigned char password[AUTH_STR_MAX_LEN];
    int password_length_in;
    char username_in[AUTH_STR_MAX_LEN];
    unsigned char password_in[AUTH_STR_MAX_LEN];
    unsigned char target_name[TARGET_NAME_MAXLEN + 1];
    unsigned char initiator_name[TARGET_NAME_MAXLEN + 1];
    unsigned char initiator_alias[TARGET_NAME_MAXLEN + 1];
    struct iscsi_portal_info portal;
};