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> |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 33 | #include <scsi/scsi_transport_iscsi.h> |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 34 | |
| 35 | struct scsi_transport_template; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 36 | struct scsi_host_template; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 37 | struct scsi_device; |
| 38 | struct Scsi_Host; |
Mike Christie | 6b5d6c4 | 2009-04-21 15:32:32 -0500 | [diff] [blame] | 39 | struct scsi_target; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 40 | struct scsi_cmnd; |
| 41 | struct socket; |
| 42 | struct iscsi_transport; |
| 43 | struct iscsi_cls_session; |
| 44 | struct iscsi_cls_conn; |
| 45 | struct iscsi_session; |
| 46 | struct iscsi_nopin; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 47 | struct device; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 48 | |
Mike Christie | 1548271 | 2007-05-30 12:57:19 -0500 | [diff] [blame] | 49 | #define ISCSI_DEF_XMIT_CMDS_MAX 128 /* must be power of 2 */ |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 50 | #define ISCSI_MGMT_CMDS_MAX 15 |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 51 | |
Mike Christie | e28f3d5 | 2009-03-05 14:46:01 -0600 | [diff] [blame] | 52 | #define ISCSI_DEF_CMD_PER_LUN 32 |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 53 | |
| 54 | /* Task Mgmt states */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 55 | enum { |
| 56 | TMF_INITIAL, |
| 57 | TMF_QUEUED, |
| 58 | TMF_SUCCESS, |
| 59 | TMF_FAILED, |
| 60 | TMF_TIMEDOUT, |
| 61 | TMF_NOT_FOUND, |
| 62 | }; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 63 | |
| 64 | /* Connection suspend "bit" */ |
| 65 | #define ISCSI_SUSPEND_BIT 1 |
| 66 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 67 | #define ISCSI_ITT_MASK 0x1fff |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 68 | #define ISCSI_TOTAL_CMDS_MAX 4096 |
| 69 | /* this must be a power of two greater than ISCSI_MGMT_CMDS_MAX */ |
| 70 | #define ISCSI_TOTAL_CMDS_MIN 16 |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 71 | #define ISCSI_AGE_SHIFT 28 |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 72 | #define ISCSI_AGE_MASK 0xf |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 73 | |
Mike Christie | 2223696 | 2007-05-30 12:57:24 -0500 | [diff] [blame] | 74 | #define ISCSI_ADDRESS_BUF_LEN 64 |
| 75 | |
Olaf Kirch | da32dd6 | 2007-12-13 12:43:21 -0600 | [diff] [blame] | 76 | enum { |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 77 | /* this is the maximum possible storage for AHSs */ |
| 78 | ISCSI_MAX_AHS_SIZE = sizeof(struct iscsi_ecdb_ahdr) + |
| 79 | sizeof(struct iscsi_rlength_ahdr), |
Olaf Kirch | da32dd6 | 2007-12-13 12:43:21 -0600 | [diff] [blame] | 80 | ISCSI_DIGEST_SIZE = sizeof(__u32), |
| 81 | }; |
| 82 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 83 | |
Mike Christie | b6c395e | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 84 | enum { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 85 | ISCSI_TASK_FREE, |
Mike Christie | b6c395e | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 86 | ISCSI_TASK_COMPLETED, |
| 87 | ISCSI_TASK_PENDING, |
| 88 | ISCSI_TASK_RUNNING, |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 89 | ISCSI_TASK_ABRT_TMF, /* aborted due to TMF */ |
| 90 | ISCSI_TASK_ABRT_SESS_RECOV, /* aborted due to session recovery */ |
Mike Christie | b6c395e | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 91 | }; |
| 92 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 93 | struct iscsi_r2t_info { |
| 94 | __be32 ttt; /* copied from R2T */ |
| 95 | __be32 exp_statsn; /* copied from R2T */ |
| 96 | uint32_t data_length; /* copied from R2T */ |
| 97 | uint32_t data_offset; /* copied from R2T */ |
| 98 | int data_count; /* DATA-Out payload progress */ |
| 99 | int datasn; |
| 100 | /* LLDs should set/update these values */ |
| 101 | int sent; /* R2T sequence progress */ |
| 102 | }; |
| 103 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 104 | struct iscsi_task { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 105 | /* |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 106 | * Because LLDs allocate their hdr differently, this is a pointer |
| 107 | * and length to that storage. It must be setup at session |
| 108 | * creation time. |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 109 | */ |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 110 | struct iscsi_hdr *hdr; |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 111 | unsigned short hdr_max; |
| 112 | unsigned short hdr_len; /* accumulated size of hdr used */ |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 113 | /* copied values in case we need to send tmfs */ |
| 114 | itt_t hdr_itt; |
| 115 | __be32 cmdsn; |
| 116 | uint8_t lun[8]; |
| 117 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 118 | int itt; /* this ITT */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 119 | |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 120 | unsigned imm_count; /* imm-data (bytes) */ |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 121 | /* offset in unsolicited stream (bytes); */ |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 122 | struct iscsi_r2t_info unsol_r2t; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 123 | char *data; /* mgmt payload */ |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 124 | unsigned data_count; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 125 | struct scsi_cmnd *sc; /* associated SCSI cmd*/ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 126 | struct iscsi_conn *conn; /* used connection */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 127 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 128 | /* data processing tracking */ |
| 129 | unsigned long last_xfer; |
| 130 | unsigned long last_timeout; |
| 131 | bool have_checked_conn; |
Mike Christie | b6c395e | 2006-07-24 15:47:15 -0500 | [diff] [blame] | 132 | /* state set/tested under session->lock */ |
| 133 | int state; |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 134 | atomic_t refcount; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 135 | struct list_head running; /* running cmd list */ |
| 136 | void *dd_data; /* driver/transport data */ |
| 137 | }; |
| 138 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 139 | static inline int iscsi_task_has_unsol_data(struct iscsi_task *task) |
| 140 | { |
| 141 | return task->unsol_r2t.data_length > task->unsol_r2t.sent; |
| 142 | } |
| 143 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 144 | static inline void* iscsi_next_hdr(struct iscsi_task *task) |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 145 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 146 | return (void*)task->hdr + task->hdr_len; |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 147 | } |
| 148 | |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 149 | /* Connection's states */ |
| 150 | enum { |
| 151 | ISCSI_CONN_INITIAL_STAGE, |
| 152 | ISCSI_CONN_STARTED, |
| 153 | ISCSI_CONN_STOPPED, |
| 154 | ISCSI_CONN_CLEANUP_WAIT, |
| 155 | }; |
| 156 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 157 | struct iscsi_conn { |
| 158 | struct iscsi_cls_conn *cls_conn; /* ptr to class connection */ |
| 159 | void *dd_data; /* iscsi_transport data */ |
| 160 | struct iscsi_session *session; /* parent session */ |
| 161 | /* |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 162 | * conn_stop() flag: stop to recover, stop to terminate |
| 163 | */ |
| 164 | int stop_stage; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 165 | struct timer_list transport_timer; |
| 166 | unsigned long last_recv; |
| 167 | unsigned long last_ping; |
| 168 | int ping_timeout; |
| 169 | int recv_timeout; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 170 | struct iscsi_task *ping_task; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 171 | |
| 172 | /* iSCSI connection-wide sequencing */ |
| 173 | uint32_t exp_statsn; |
| 174 | |
| 175 | /* control data */ |
| 176 | int id; /* CID */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 177 | int c_stage; /* connection state */ |
Mike Christie | c8dc1e5 | 2006-07-24 15:47:39 -0500 | [diff] [blame] | 178 | /* |
| 179 | * Preallocated buffer for pdus that have data but do not |
| 180 | * originate from scsi-ml. We never have two pdus using the |
| 181 | * buffer at the same time. It is only allocated to |
| 182 | * the default max recv size because the pdus we support |
| 183 | * should always fit in this buffer |
| 184 | */ |
| 185 | char *data; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 186 | struct iscsi_task *login_task; /* mtask used for login/text */ |
| 187 | struct iscsi_task *task; /* xmit task in progress */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 188 | |
| 189 | /* xmit */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 190 | struct list_head mgmtqueue; /* mgmt (control) xmit queue */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 191 | struct list_head cmdqueue; /* data-path cmd queue */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 192 | struct list_head requeue; /* tasks needing another run */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 193 | struct work_struct xmitwork; /* per-conn. xmit workqueue */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 194 | unsigned long suspend_tx; /* suspend Tx */ |
| 195 | unsigned long suspend_rx; /* suspend Rx */ |
| 196 | |
| 197 | /* abort */ |
| 198 | wait_queue_head_t ehwait; /* used in eh_abort() */ |
| 199 | struct iscsi_tm tmhdr; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 200 | struct timer_list tmf_timer; |
| 201 | int tmf_state; /* see TMF_INITIAL, etc.*/ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 202 | |
| 203 | /* negotiated params */ |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 204 | unsigned max_recv_dlength; /* initiator_max_recv_dsl*/ |
| 205 | unsigned max_xmit_dlength; /* target_max_recv_dsl */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 206 | int hdrdgst_en; |
| 207 | int datadgst_en; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 208 | int ifmarker_en; |
| 209 | int ofmarker_en; |
| 210 | /* values userspace uses to id a conn */ |
| 211 | int persistent_port; |
| 212 | char *persistent_address; |
Mike Christie | 2223696 | 2007-05-30 12:57:24 -0500 | [diff] [blame] | 213 | /* remote portal currently connected to */ |
| 214 | int portal_port; |
| 215 | char portal_address[ISCSI_ADDRESS_BUF_LEN]; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 216 | |
| 217 | /* MIB-statistics */ |
| 218 | uint64_t txdata_octets; |
| 219 | uint64_t rxdata_octets; |
| 220 | uint32_t scsicmd_pdus_cnt; |
| 221 | uint32_t dataout_pdus_cnt; |
| 222 | uint32_t scsirsp_pdus_cnt; |
| 223 | uint32_t datain_pdus_cnt; |
| 224 | uint32_t r2t_pdus_cnt; |
| 225 | uint32_t tmfcmd_pdus_cnt; |
| 226 | int32_t tmfrsp_pdus_cnt; |
| 227 | |
| 228 | /* custom statistics */ |
| 229 | uint32_t eh_abort_cnt; |
Eli Dorfman | 8752822 | 2008-04-29 13:46:52 -0700 | [diff] [blame] | 230 | uint32_t fmr_unalign_cnt; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 231 | }; |
| 232 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 233 | struct iscsi_pool { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 234 | struct kfifo *queue; /* FIFO Queue */ |
| 235 | void **pool; /* Pool of elements */ |
| 236 | int max; /* Max number of elements */ |
| 237 | }; |
| 238 | |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 239 | /* Session's states */ |
| 240 | enum { |
| 241 | ISCSI_STATE_FREE = 1, |
| 242 | ISCSI_STATE_LOGGED_IN, |
| 243 | ISCSI_STATE_FAILED, |
| 244 | ISCSI_STATE_TERMINATE, |
| 245 | ISCSI_STATE_IN_RECOVERY, |
| 246 | ISCSI_STATE_RECOVERY_FAILED, |
| 247 | ISCSI_STATE_LOGGING_OUT, |
| 248 | }; |
| 249 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 250 | struct iscsi_session { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 251 | struct iscsi_cls_session *cls_session; |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 252 | /* |
| 253 | * Syncs up the scsi eh thread with the iscsi eh thread when sending |
| 254 | * task management functions. This must be taken before the session |
| 255 | * and recv lock. |
| 256 | */ |
| 257 | struct mutex eh_mutex; |
| 258 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 259 | /* iSCSI session-wide sequencing */ |
| 260 | uint32_t cmdsn; |
| 261 | uint32_t exp_cmdsn; |
| 262 | uint32_t max_cmdsn; |
| 263 | |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 264 | /* This tracks the reqs queued into the initiator */ |
| 265 | uint32_t queued_cmdsn; |
| 266 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 267 | /* configuration */ |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 268 | int abort_timeout; |
| 269 | int lu_reset_timeout; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 270 | int initial_r2t_en; |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 271 | unsigned max_r2t; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 272 | int imm_data_en; |
Mike Christie | 857ae0b | 2007-05-30 12:57:15 -0500 | [diff] [blame] | 273 | unsigned first_burst; |
| 274 | unsigned max_burst; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 275 | int time2wait; |
| 276 | int time2retain; |
| 277 | int pdu_inorder_en; |
| 278 | int dataseq_inorder_en; |
| 279 | int erl; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 280 | int fast_abort; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 281 | int tpgt; |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 282 | char *username; |
| 283 | char *username_in; |
| 284 | char *password; |
| 285 | char *password_in; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 286 | char *targetname; |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 287 | char *ifacename; |
| 288 | char *initiatorname; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 289 | /* control data */ |
| 290 | struct iscsi_transport *tt; |
| 291 | struct Scsi_Host *host; |
| 292 | struct iscsi_conn *leadconn; /* leading connection */ |
| 293 | spinlock_t lock; /* protects session state, * |
| 294 | * sequence numbers, * |
| 295 | * session resources: * |
| 296 | * - cmdpool, * |
| 297 | * - mgmtpool, * |
| 298 | * - r2tpool */ |
| 299 | int state; /* session state */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 300 | int age; /* counts session re-opens */ |
| 301 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 302 | int scsi_cmds_max; /* max scsi commands */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 303 | int cmds_max; /* size of cmds array */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 304 | struct iscsi_task **cmds; /* Original Cmds arr */ |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 305 | struct iscsi_pool cmdpool; /* PDU's pool */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 306 | }; |
| 307 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 308 | enum { |
| 309 | ISCSI_HOST_SETUP, |
| 310 | ISCSI_HOST_REMOVED, |
| 311 | }; |
| 312 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 313 | struct iscsi_host { |
| 314 | char *initiatorname; |
| 315 | /* hw address or netdev iscsi connection is bound to */ |
| 316 | char *hwaddress; |
| 317 | char *netdev; |
| 318 | /* local address */ |
| 319 | int local_port; |
| 320 | char local_address[ISCSI_ADDRESS_BUF_LEN]; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 321 | |
| 322 | wait_queue_head_t session_removal_wq; |
| 323 | /* protects sessions and state */ |
| 324 | spinlock_t lock; |
| 325 | int num_sessions; |
| 326 | int state; |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 327 | |
| 328 | struct workqueue_struct *workq; |
| 329 | char workq_name[20]; |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 330 | }; |
| 331 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 332 | /* |
| 333 | * scsi host template |
| 334 | */ |
| 335 | extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth); |
| 336 | extern int iscsi_eh_abort(struct scsi_cmnd *sc); |
Mike Christie | 8e12452 | 2008-09-24 11:46:12 -0500 | [diff] [blame] | 337 | extern int iscsi_eh_target_reset(struct scsi_cmnd *sc); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 338 | extern int iscsi_eh_device_reset(struct scsi_cmnd *sc); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 339 | extern int iscsi_queuecommand(struct scsi_cmnd *sc, |
| 340 | void (*done)(struct scsi_cmnd *)); |
| 341 | |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 342 | /* |
| 343 | * iSCSI host helpers. |
| 344 | */ |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 345 | #define iscsi_host_priv(_shost) \ |
| 346 | (shost_priv(_shost) + sizeof(struct iscsi_host)) |
| 347 | |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 348 | extern int iscsi_host_set_param(struct Scsi_Host *shost, |
| 349 | enum iscsi_host_param param, char *buf, |
| 350 | int buflen); |
| 351 | extern int iscsi_host_get_param(struct Scsi_Host *shost, |
| 352 | enum iscsi_host_param param, char *buf); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 353 | extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev); |
| 354 | extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, |
Mike Christie | 4d10835 | 2009-03-05 14:46:04 -0600 | [diff] [blame] | 355 | int dd_data_size, |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 356 | bool xmit_can_sleep); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 357 | extern void iscsi_host_remove(struct Scsi_Host *shost); |
| 358 | extern void iscsi_host_free(struct Scsi_Host *shost); |
Mike Christie | 6b5d6c4 | 2009-04-21 15:32:32 -0500 | [diff] [blame] | 359 | extern int iscsi_target_alloc(struct scsi_target *starget); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 360 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 361 | /* |
| 362 | * session management |
| 363 | */ |
| 364 | extern struct iscsi_cls_session * |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 365 | iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost, |
Mike Christie | 7970634 | 2008-05-21 15:54:12 -0500 | [diff] [blame] | 366 | uint16_t, int, uint32_t, unsigned int); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 367 | extern void iscsi_session_teardown(struct iscsi_cls_session *); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 368 | extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 369 | extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn, |
| 370 | enum iscsi_param param, char *buf, int buflen); |
| 371 | extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session, |
| 372 | enum iscsi_param param, char *buf); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 373 | |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 374 | #define iscsi_session_printk(prefix, _sess, fmt, a...) \ |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 375 | iscsi_cls_session_printk(prefix, _sess->cls_session, fmt, ##a) |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 376 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 377 | /* |
| 378 | * connection management |
| 379 | */ |
| 380 | extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *, |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 381 | int, uint32_t); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 382 | extern void iscsi_conn_teardown(struct iscsi_cls_conn *); |
| 383 | extern int iscsi_conn_start(struct iscsi_cls_conn *); |
| 384 | extern void iscsi_conn_stop(struct iscsi_cls_conn *, int); |
| 385 | extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *, |
| 386 | int); |
| 387 | extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err); |
Mike Christie | 40a06e7 | 2009-03-05 14:46:05 -0600 | [diff] [blame] | 388 | extern void iscsi_session_failure(struct iscsi_session *session, |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 389 | enum iscsi_err err); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 390 | extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| 391 | enum iscsi_param param, char *buf); |
Mike Christie | 5af3e91 | 2008-05-21 15:54:02 -0500 | [diff] [blame] | 392 | extern void iscsi_suspend_tx(struct iscsi_conn *conn); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 393 | extern void iscsi_conn_queue_work(struct iscsi_conn *conn); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 394 | |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 395 | #define iscsi_conn_printk(prefix, _c, fmt, a...) \ |
Mike Christie | 5af3e91 | 2008-05-21 15:54:02 -0500 | [diff] [blame] | 396 | iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \ |
| 397 | fmt, ##a) |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 398 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 399 | /* |
| 400 | * pdu and task processing |
| 401 | */ |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 402 | extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 403 | extern void iscsi_prep_data_out_pdu(struct iscsi_task *task, |
| 404 | struct iscsi_r2t_info *r2t, |
| 405 | struct iscsi_data *hdr); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 406 | extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *, |
| 407 | char *, uint32_t); |
| 408 | extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, |
| 409 | char *, int); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 410 | extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, |
| 411 | char *, int); |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 412 | extern int iscsi_verify_itt(struct iscsi_conn *, itt_t); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 413 | extern struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t); |
Mike Christie | 8f9256c | 2009-05-13 17:57:41 -0500 | [diff] [blame] | 414 | extern struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *, itt_t); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 415 | extern void iscsi_requeue_task(struct iscsi_task *task); |
| 416 | extern void iscsi_put_task(struct iscsi_task *task); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 417 | extern void __iscsi_get_task(struct iscsi_task *task); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 418 | |
| 419 | /* |
| 420 | * generic helpers |
| 421 | */ |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 422 | extern void iscsi_pool_free(struct iscsi_pool *); |
| 423 | extern int iscsi_pool_init(struct iscsi_pool *, int, void ***, int); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 424 | |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 425 | /* |
| 426 | * inline functions to deal with padding. |
| 427 | */ |
| 428 | static inline unsigned int |
| 429 | iscsi_padded(unsigned int len) |
| 430 | { |
| 431 | return (len + ISCSI_PAD_LEN - 1) & ~(ISCSI_PAD_LEN - 1); |
| 432 | } |
| 433 | |
| 434 | static inline unsigned int |
| 435 | iscsi_padding(unsigned int len) |
| 436 | { |
| 437 | len &= (ISCSI_PAD_LEN - 1); |
| 438 | if (len) |
| 439 | len = ISCSI_PAD_LEN - len; |
| 440 | return len; |
| 441 | } |
| 442 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 443 | #endif |