Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1 | /* |
| 2 | * iSCSI lib definitions |
| 3 | * |
| 4 | * Copyright (C) 2006 Red Hat, Inc. All rights reserved. |
| 5 | * Copyright (C) 2004 - 2006 Mike Christie |
| 6 | * Copyright (C) 2004 - 2005 Dmitry Yusupov |
| 7 | * Copyright (C) 2004 - 2005 Alex Aizman |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | */ |
| 23 | #ifndef LIBISCSI_H |
| 24 | #define LIBISCSI_H |
| 25 | |
| 26 | #include <linux/types.h> |
Mike Christie | 40753ca | 2008-05-21 15:53:56 -0500 | [diff] [blame] | 27 | #include <linux/wait.h> |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 28 | #include <linux/mutex.h> |
Al Viro | f6a5703 | 2006-10-18 01:47:25 -0400 | [diff] [blame] | 29 | #include <linux/timer.h> |
| 30 | #include <linux/workqueue.h> |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 31 | #include <scsi/iscsi_proto.h> |
| 32 | #include <scsi/iscsi_if.h> |
| 33 | |
| 34 | struct scsi_transport_template; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame^] | 35 | struct scsi_host_template; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 36 | struct scsi_device; |
| 37 | struct Scsi_Host; |
| 38 | struct scsi_cmnd; |
| 39 | struct socket; |
| 40 | struct iscsi_transport; |
| 41 | struct iscsi_cls_session; |
| 42 | struct iscsi_cls_conn; |
| 43 | struct iscsi_session; |
| 44 | struct iscsi_nopin; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame^] | 45 | struct device; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 46 | |
| 47 | /* #define DEBUG_SCSI */ |
| 48 | #ifdef DEBUG_SCSI |
Or Gerlitz | be2df72 | 2006-05-02 19:46:43 -0500 | [diff] [blame] | 49 | #define debug_scsi(fmt...) printk(KERN_INFO "iscsi: " fmt) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 50 | #else |
| 51 | #define debug_scsi(fmt...) |
| 52 | #endif |
| 53 | |
Mike Christie | 1548271 | 2007-05-30 12:57:19 -0500 | [diff] [blame] | 54 | #define ISCSI_DEF_XMIT_CMDS_MAX 128 /* must be power of 2 */ |
| 55 | #define ISCSI_MGMT_CMDS_MAX 16 /* must be power of 2 */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 56 | |
| 57 | #define ISCSI_MGMT_ITT_OFFSET 0xa00 |
| 58 | |
| 59 | #define ISCSI_DEF_CMD_PER_LUN 32 |
| 60 | #define ISCSI_MAX_CMD_PER_LUN 128 |
| 61 | |
| 62 | /* Task Mgmt states */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 63 | enum { |
| 64 | TMF_INITIAL, |
| 65 | TMF_QUEUED, |
| 66 | TMF_SUCCESS, |
| 67 | TMF_FAILED, |
| 68 | TMF_TIMEDOUT, |
| 69 | TMF_NOT_FOUND, |
| 70 | }; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 71 | |
| 72 | /* Connection suspend "bit" */ |
| 73 | #define ISCSI_SUSPEND_BIT 1 |
| 74 | |
| 75 | #define ISCSI_ITT_MASK (0xfff) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 76 | #define ISCSI_AGE_SHIFT 28 |
| 77 | #define ISCSI_AGE_MASK (0xf << ISCSI_AGE_SHIFT) |
| 78 | |
Mike Christie | 2223696 | 2007-05-30 12:57:24 -0500 | [diff] [blame] | 79 | #define ISCSI_ADDRESS_BUF_LEN 64 |
| 80 | |
Olaf Kirch | da32dd6 | 2007-12-13 12:43:21 -0600 | [diff] [blame] | 81 | enum { |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 82 | /* this is the maximum possible storage for AHSs */ |
| 83 | ISCSI_MAX_AHS_SIZE = sizeof(struct iscsi_ecdb_ahdr) + |
| 84 | sizeof(struct iscsi_rlength_ahdr), |
Olaf Kirch | da32dd6 | 2007-12-13 12:43:21 -0600 | [diff] [blame] | 85 | ISCSI_DIGEST_SIZE = sizeof(__u32), |
| 86 | }; |
| 87 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 88 | struct iscsi_mgmt_task { |
| 89 | /* |
| 90 | * Becuae LLDs allocate their hdr differently, this is a pointer to |
| 91 | * that storage. It must be setup at session creation time. |
| 92 | */ |
| 93 | struct iscsi_hdr *hdr; |
| 94 | char *data; /* mgmt payload */ |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 95 | unsigned data_count; /* counts data to be sent */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 96 | uint32_t itt; /* this ITT */ |
| 97 | void *dd_data; /* driver/transport data */ |
| 98 | struct list_head running; |
| 99 | }; |
| 100 | |
Mike Christie | b6c395ed | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 101 | enum { |
| 102 | ISCSI_TASK_COMPLETED, |
| 103 | ISCSI_TASK_PENDING, |
| 104 | ISCSI_TASK_RUNNING, |
| 105 | }; |
| 106 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 107 | struct iscsi_cmd_task { |
| 108 | /* |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 109 | * Because LLDs allocate their hdr differently, this is a pointer |
| 110 | * and length to that storage. It must be setup at session |
| 111 | * creation time. |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 112 | */ |
| 113 | struct iscsi_cmd *hdr; |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 114 | unsigned short hdr_max; |
| 115 | unsigned short hdr_len; /* accumulated size of hdr used */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 116 | int itt; /* this ITT */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 117 | |
| 118 | uint32_t unsol_datasn; |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 119 | unsigned imm_count; /* imm-data (bytes) */ |
| 120 | unsigned unsol_count; /* unsolicited (bytes)*/ |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 121 | /* offset in unsolicited stream (bytes); */ |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 122 | unsigned unsol_offset; |
| 123 | unsigned data_count; /* remaining Data-Out */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 124 | struct scsi_cmnd *sc; /* associated SCSI cmd*/ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 125 | struct iscsi_conn *conn; /* used connection */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 126 | |
Mike Christie | b6c395ed | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 127 | /* state set/tested under session->lock */ |
| 128 | int state; |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 129 | atomic_t refcount; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 130 | struct list_head running; /* running cmd list */ |
| 131 | void *dd_data; /* driver/transport data */ |
| 132 | }; |
| 133 | |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 134 | static inline void* iscsi_next_hdr(struct iscsi_cmd_task *ctask) |
| 135 | { |
| 136 | return (void*)ctask->hdr + ctask->hdr_len; |
| 137 | } |
| 138 | |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 139 | /* Connection's states */ |
| 140 | enum { |
| 141 | ISCSI_CONN_INITIAL_STAGE, |
| 142 | ISCSI_CONN_STARTED, |
| 143 | ISCSI_CONN_STOPPED, |
| 144 | ISCSI_CONN_CLEANUP_WAIT, |
| 145 | }; |
| 146 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 147 | struct iscsi_conn { |
| 148 | struct iscsi_cls_conn *cls_conn; /* ptr to class connection */ |
| 149 | void *dd_data; /* iscsi_transport data */ |
| 150 | struct iscsi_session *session; /* parent session */ |
| 151 | /* |
| 152 | * LLDs should set this lock. It protects the transport recv |
| 153 | * code |
| 154 | */ |
| 155 | rwlock_t *recv_lock; |
| 156 | /* |
| 157 | * conn_stop() flag: stop to recover, stop to terminate |
| 158 | */ |
| 159 | int stop_stage; |
Mike Christie | f6d5180c7 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 160 | struct timer_list transport_timer; |
| 161 | unsigned long last_recv; |
| 162 | unsigned long last_ping; |
| 163 | int ping_timeout; |
| 164 | int recv_timeout; |
| 165 | struct iscsi_mgmt_task *ping_mtask; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 166 | |
| 167 | /* iSCSI connection-wide sequencing */ |
| 168 | uint32_t exp_statsn; |
| 169 | |
| 170 | /* control data */ |
| 171 | int id; /* CID */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 172 | int c_stage; /* connection state */ |
Mike Christie | c8dc1e5 | 2006-07-24 15:47:39 -0500 | [diff] [blame] | 173 | /* |
| 174 | * Preallocated buffer for pdus that have data but do not |
| 175 | * originate from scsi-ml. We never have two pdus using the |
| 176 | * buffer at the same time. It is only allocated to |
| 177 | * the default max recv size because the pdus we support |
| 178 | * should always fit in this buffer |
| 179 | */ |
| 180 | char *data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 181 | struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */ |
| 182 | struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */ |
| 183 | struct iscsi_cmd_task *ctask; /* xmit ctask in progress */ |
| 184 | |
| 185 | /* xmit */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 186 | struct list_head mgmtqueue; /* mgmt (control) xmit queue */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 187 | struct list_head mgmt_run_list; /* list of control tasks */ |
Mike Christie | b6c395ed | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 188 | struct list_head xmitqueue; /* data-path cmd queue */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 189 | struct list_head run_list; /* list of cmds in progress */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 190 | struct list_head requeue; /* tasks needing another run */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 191 | struct work_struct xmitwork; /* per-conn. xmit workqueue */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 192 | unsigned long suspend_tx; /* suspend Tx */ |
| 193 | unsigned long suspend_rx; /* suspend Rx */ |
| 194 | |
| 195 | /* abort */ |
| 196 | wait_queue_head_t ehwait; /* used in eh_abort() */ |
| 197 | struct iscsi_tm tmhdr; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 198 | struct timer_list tmf_timer; |
| 199 | int tmf_state; /* see TMF_INITIAL, etc.*/ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 200 | |
| 201 | /* negotiated params */ |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 202 | unsigned max_recv_dlength; /* initiator_max_recv_dsl*/ |
| 203 | unsigned max_xmit_dlength; /* target_max_recv_dsl */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 204 | int hdrdgst_en; |
| 205 | int datadgst_en; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 206 | int ifmarker_en; |
| 207 | int ofmarker_en; |
| 208 | /* values userspace uses to id a conn */ |
| 209 | int persistent_port; |
| 210 | char *persistent_address; |
Mike Christie | 2223696 | 2007-05-30 12:57:24 -0500 | [diff] [blame] | 211 | /* remote portal currently connected to */ |
| 212 | int portal_port; |
| 213 | char portal_address[ISCSI_ADDRESS_BUF_LEN]; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 214 | |
| 215 | /* MIB-statistics */ |
| 216 | uint64_t txdata_octets; |
| 217 | uint64_t rxdata_octets; |
| 218 | uint32_t scsicmd_pdus_cnt; |
| 219 | uint32_t dataout_pdus_cnt; |
| 220 | uint32_t scsirsp_pdus_cnt; |
| 221 | uint32_t datain_pdus_cnt; |
| 222 | uint32_t r2t_pdus_cnt; |
| 223 | uint32_t tmfcmd_pdus_cnt; |
| 224 | int32_t tmfrsp_pdus_cnt; |
| 225 | |
| 226 | /* custom statistics */ |
| 227 | uint32_t eh_abort_cnt; |
Eli Dorfman | 8752822 | 2008-04-29 13:46:52 -0700 | [diff] [blame] | 228 | uint32_t fmr_unalign_cnt; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 229 | }; |
| 230 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 231 | struct iscsi_pool { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 232 | struct kfifo *queue; /* FIFO Queue */ |
| 233 | void **pool; /* Pool of elements */ |
| 234 | int max; /* Max number of elements */ |
| 235 | }; |
| 236 | |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 237 | /* Session's states */ |
| 238 | enum { |
| 239 | ISCSI_STATE_FREE = 1, |
| 240 | ISCSI_STATE_LOGGED_IN, |
| 241 | ISCSI_STATE_FAILED, |
| 242 | ISCSI_STATE_TERMINATE, |
| 243 | ISCSI_STATE_IN_RECOVERY, |
| 244 | ISCSI_STATE_RECOVERY_FAILED, |
| 245 | ISCSI_STATE_LOGGING_OUT, |
| 246 | }; |
| 247 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 248 | struct iscsi_session { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 249 | struct iscsi_cls_session *cls_session; |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 250 | /* |
| 251 | * Syncs up the scsi eh thread with the iscsi eh thread when sending |
| 252 | * task management functions. This must be taken before the session |
| 253 | * and recv lock. |
| 254 | */ |
| 255 | struct mutex eh_mutex; |
| 256 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 257 | /* iSCSI session-wide sequencing */ |
| 258 | uint32_t cmdsn; |
| 259 | uint32_t exp_cmdsn; |
| 260 | uint32_t max_cmdsn; |
| 261 | |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 262 | /* This tracks the reqs queued into the initiator */ |
| 263 | uint32_t queued_cmdsn; |
| 264 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 265 | /* configuration */ |
Mike Christie | f6d5180c7 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 266 | int abort_timeout; |
| 267 | int lu_reset_timeout; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 268 | int initial_r2t_en; |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 269 | unsigned max_r2t; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 270 | int imm_data_en; |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 271 | unsigned first_burst; |
| 272 | unsigned max_burst; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 273 | int time2wait; |
| 274 | int time2retain; |
| 275 | int pdu_inorder_en; |
| 276 | int dataseq_inorder_en; |
| 277 | int erl; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 278 | int fast_abort; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 279 | int tpgt; |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 280 | char *username; |
| 281 | char *username_in; |
| 282 | char *password; |
| 283 | char *password_in; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 284 | char *targetname; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 285 | /* control data */ |
| 286 | struct iscsi_transport *tt; |
| 287 | struct Scsi_Host *host; |
| 288 | struct iscsi_conn *leadconn; /* leading connection */ |
| 289 | spinlock_t lock; /* protects session state, * |
| 290 | * sequence numbers, * |
| 291 | * session resources: * |
| 292 | * - cmdpool, * |
| 293 | * - mgmtpool, * |
| 294 | * - r2tpool */ |
| 295 | int state; /* session state */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 296 | int age; /* counts session re-opens */ |
| 297 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 298 | int cmds_max; /* size of cmds array */ |
| 299 | struct iscsi_cmd_task **cmds; /* Original Cmds arr */ |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 300 | struct iscsi_pool cmdpool; /* PDU's pool */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 301 | int mgmtpool_max; /* size of mgmt array */ |
| 302 | struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */ |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 303 | struct iscsi_pool mgmtpool; /* Mgmt PDU's pool */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 304 | }; |
| 305 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 306 | struct iscsi_host { |
| 307 | char *initiatorname; |
| 308 | /* hw address or netdev iscsi connection is bound to */ |
| 309 | char *hwaddress; |
| 310 | char *netdev; |
| 311 | /* local address */ |
| 312 | int local_port; |
| 313 | char local_address[ISCSI_ADDRESS_BUF_LEN]; |
| 314 | }; |
| 315 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame^] | 316 | #define iscsi_host_priv(_shost) \ |
| 317 | (shost_priv(_shost) + sizeof(struct iscsi_host)) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 318 | /* |
| 319 | * scsi host template |
| 320 | */ |
| 321 | extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth); |
| 322 | extern int iscsi_eh_abort(struct scsi_cmnd *sc); |
| 323 | extern int iscsi_eh_host_reset(struct scsi_cmnd *sc); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 324 | extern int iscsi_eh_device_reset(struct scsi_cmnd *sc); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 325 | extern int iscsi_queuecommand(struct scsi_cmnd *sc, |
| 326 | void (*done)(struct scsi_cmnd *)); |
| 327 | |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 328 | |
| 329 | /* |
| 330 | * iSCSI host helpers. |
| 331 | */ |
| 332 | extern int iscsi_host_set_param(struct Scsi_Host *shost, |
| 333 | enum iscsi_host_param param, char *buf, |
| 334 | int buflen); |
| 335 | extern int iscsi_host_get_param(struct Scsi_Host *shost, |
| 336 | enum iscsi_host_param param, char *buf); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame^] | 337 | extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev); |
| 338 | extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, |
| 339 | int dd_data_size, uint16_t qdepth); |
| 340 | extern void iscsi_host_remove(struct Scsi_Host *shost); |
| 341 | extern void iscsi_host_free(struct Scsi_Host *shost); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 342 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 343 | /* |
| 344 | * session management |
| 345 | */ |
| 346 | extern struct iscsi_cls_session * |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 347 | iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost, |
| 348 | uint16_t, int, int, uint32_t); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 349 | extern void iscsi_session_teardown(struct iscsi_cls_session *); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 350 | extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 351 | extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn, |
| 352 | enum iscsi_param param, char *buf, int buflen); |
| 353 | extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session, |
| 354 | enum iscsi_param param, char *buf); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 355 | |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 356 | #define iscsi_session_printk(prefix, _sess, fmt, a...) \ |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 357 | iscsi_cls_session_printk(prefix, _sess->cls_session, fmt, ##a) |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 358 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 359 | /* |
| 360 | * connection management |
| 361 | */ |
| 362 | extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *, |
| 363 | uint32_t); |
| 364 | extern void iscsi_conn_teardown(struct iscsi_cls_conn *); |
| 365 | extern int iscsi_conn_start(struct iscsi_cls_conn *); |
| 366 | extern void iscsi_conn_stop(struct iscsi_cls_conn *, int); |
| 367 | extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *, |
| 368 | int); |
| 369 | extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 370 | extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| 371 | enum iscsi_param param, char *buf); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 372 | |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 373 | #define iscsi_conn_printk(prefix, _c, fmt, a...) \ |
| 374 | iscsi_cls_conn_printk(prefix, _c->cls_conn, fmt, ##a) |
| 375 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 376 | /* |
| 377 | * pdu and task processing |
| 378 | */ |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 379 | extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 380 | extern void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *, |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 381 | struct iscsi_data *hdr); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 382 | extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *, |
| 383 | char *, uint32_t); |
| 384 | extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, |
| 385 | char *, int); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 386 | extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *, |
| 387 | uint32_t *); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 388 | extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 389 | extern void iscsi_free_mgmt_task(struct iscsi_conn *conn, |
| 390 | struct iscsi_mgmt_task *mtask); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 391 | |
| 392 | /* |
| 393 | * generic helpers |
| 394 | */ |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 395 | extern void iscsi_pool_free(struct iscsi_pool *); |
| 396 | extern int iscsi_pool_init(struct iscsi_pool *, int, void ***, int); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 397 | |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 398 | /* |
| 399 | * inline functions to deal with padding. |
| 400 | */ |
| 401 | static inline unsigned int |
| 402 | iscsi_padded(unsigned int len) |
| 403 | { |
| 404 | return (len + ISCSI_PAD_LEN - 1) & ~(ISCSI_PAD_LEN - 1); |
| 405 | } |
| 406 | |
| 407 | static inline unsigned int |
| 408 | iscsi_padding(unsigned int len) |
| 409 | { |
| 410 | len &= (ISCSI_PAD_LEN - 1); |
| 411 | if (len) |
| 412 | len = ISCSI_PAD_LEN - len; |
| 413 | return len; |
| 414 | } |
| 415 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 416 | #endif |