Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1 | /* |
| 2 | * iSCSI lib functions |
| 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 | * maintained by open-iscsi@googlegroups.com |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | */ |
| 24 | #include <linux/types.h> |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 25 | #include <linux/kfifo.h> |
| 26 | #include <linux/delay.h> |
vignesh babu | 1183657 | 2007-12-13 12:43:41 -0600 | [diff] [blame] | 27 | #include <linux/log2.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Paul Gortmaker | acf3368f | 2011-05-27 09:47:43 -0400 | [diff] [blame] | 29 | #include <linux/module.h> |
Mike Christie | 8eb0053 | 2007-02-28 17:32:19 -0600 | [diff] [blame] | 30 | #include <asm/unaligned.h> |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 31 | #include <net/tcp.h> |
| 32 | #include <scsi/scsi_cmnd.h> |
| 33 | #include <scsi/scsi_device.h> |
| 34 | #include <scsi/scsi_eh.h> |
| 35 | #include <scsi/scsi_tcq.h> |
| 36 | #include <scsi/scsi_host.h> |
| 37 | #include <scsi/scsi.h> |
| 38 | #include <scsi/iscsi_proto.h> |
| 39 | #include <scsi/scsi_transport.h> |
| 40 | #include <scsi/scsi_transport_iscsi.h> |
| 41 | #include <scsi/libiscsi.h> |
| 42 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 43 | static int iscsi_dbg_lib_conn; |
| 44 | module_param_named(debug_libiscsi_conn, iscsi_dbg_lib_conn, int, |
| 45 | S_IRUGO | S_IWUSR); |
| 46 | MODULE_PARM_DESC(debug_libiscsi_conn, |
| 47 | "Turn on debugging for connections in libiscsi module. " |
| 48 | "Set to 1 to turn on, and zero to turn off. Default is off."); |
| 49 | |
| 50 | static int iscsi_dbg_lib_session; |
| 51 | module_param_named(debug_libiscsi_session, iscsi_dbg_lib_session, int, |
| 52 | S_IRUGO | S_IWUSR); |
| 53 | MODULE_PARM_DESC(debug_libiscsi_session, |
| 54 | "Turn on debugging for sessions in libiscsi module. " |
| 55 | "Set to 1 to turn on, and zero to turn off. Default is off."); |
| 56 | |
| 57 | static int iscsi_dbg_lib_eh; |
| 58 | module_param_named(debug_libiscsi_eh, iscsi_dbg_lib_eh, int, |
| 59 | S_IRUGO | S_IWUSR); |
| 60 | MODULE_PARM_DESC(debug_libiscsi_eh, |
| 61 | "Turn on debugging for error handling in libiscsi module. " |
| 62 | "Set to 1 to turn on, and zero to turn off. Default is off."); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 63 | |
| 64 | #define ISCSI_DBG_CONN(_conn, dbg_fmt, arg...) \ |
| 65 | do { \ |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 66 | if (iscsi_dbg_lib_conn) \ |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 67 | iscsi_conn_printk(KERN_INFO, _conn, \ |
| 68 | "%s " dbg_fmt, \ |
| 69 | __func__, ##arg); \ |
| 70 | } while (0); |
| 71 | |
| 72 | #define ISCSI_DBG_SESSION(_session, dbg_fmt, arg...) \ |
| 73 | do { \ |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 74 | if (iscsi_dbg_lib_session) \ |
| 75 | iscsi_session_printk(KERN_INFO, _session, \ |
| 76 | "%s " dbg_fmt, \ |
| 77 | __func__, ##arg); \ |
| 78 | } while (0); |
| 79 | |
| 80 | #define ISCSI_DBG_EH(_session, dbg_fmt, arg...) \ |
| 81 | do { \ |
| 82 | if (iscsi_dbg_lib_eh) \ |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 83 | iscsi_session_printk(KERN_INFO, _session, \ |
| 84 | "%s " dbg_fmt, \ |
| 85 | __func__, ##arg); \ |
| 86 | } while (0); |
| 87 | |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 88 | inline void iscsi_conn_queue_work(struct iscsi_conn *conn) |
| 89 | { |
| 90 | struct Scsi_Host *shost = conn->session->host; |
| 91 | struct iscsi_host *ihost = shost_priv(shost); |
| 92 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 93 | if (ihost->workq) |
| 94 | queue_work(ihost->workq, &conn->xmitwork); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 95 | } |
| 96 | EXPORT_SYMBOL_GPL(iscsi_conn_queue_work); |
| 97 | |
Mike Christie | 4c0ba5d | 2009-09-05 07:34:23 +0530 | [diff] [blame] | 98 | static void __iscsi_update_cmdsn(struct iscsi_session *session, |
| 99 | uint32_t exp_cmdsn, uint32_t max_cmdsn) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 100 | { |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 101 | /* |
| 102 | * standard specifies this check for when to update expected and |
| 103 | * max sequence numbers |
| 104 | */ |
| 105 | if (iscsi_sna_lt(max_cmdsn, exp_cmdsn - 1)) |
| 106 | return; |
| 107 | |
| 108 | if (exp_cmdsn != session->exp_cmdsn && |
| 109 | !iscsi_sna_lt(exp_cmdsn, session->exp_cmdsn)) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 110 | session->exp_cmdsn = exp_cmdsn; |
| 111 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 112 | if (max_cmdsn != session->max_cmdsn && |
Mike Christie | 46a84c6 | 2014-02-07 00:41:39 -0600 | [diff] [blame^] | 113 | !iscsi_sna_lt(max_cmdsn, session->max_cmdsn)) |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 114 | session->max_cmdsn = max_cmdsn; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 115 | } |
Mike Christie | 4c0ba5d | 2009-09-05 07:34:23 +0530 | [diff] [blame] | 116 | |
| 117 | void iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr) |
| 118 | { |
| 119 | __iscsi_update_cmdsn(session, be32_to_cpu(hdr->exp_cmdsn), |
| 120 | be32_to_cpu(hdr->max_cmdsn)); |
| 121 | } |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 122 | EXPORT_SYMBOL_GPL(iscsi_update_cmdsn); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 123 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 124 | /** |
| 125 | * iscsi_prep_data_out_pdu - initialize Data-Out |
| 126 | * @task: scsi command task |
| 127 | * @r2t: R2T info |
| 128 | * @hdr: iscsi data in pdu |
| 129 | * |
| 130 | * Notes: |
| 131 | * Initialize Data-Out within this R2T sequence and finds |
| 132 | * proper data_offset within this SCSI command. |
| 133 | * |
| 134 | * This function is called with connection lock taken. |
| 135 | **/ |
| 136 | void iscsi_prep_data_out_pdu(struct iscsi_task *task, struct iscsi_r2t_info *r2t, |
| 137 | struct iscsi_data *hdr) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 138 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 139 | struct iscsi_conn *conn = task->conn; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 140 | unsigned int left = r2t->data_length - r2t->sent; |
| 141 | |
| 142 | task->hdr_len = sizeof(struct iscsi_data); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 143 | |
| 144 | memset(hdr, 0, sizeof(struct iscsi_data)); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 145 | hdr->ttt = r2t->ttt; |
| 146 | hdr->datasn = cpu_to_be32(r2t->datasn); |
| 147 | r2t->datasn++; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 148 | hdr->opcode = ISCSI_OP_SCSI_DATA_OUT; |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 149 | hdr->lun = task->lun; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 150 | hdr->itt = task->hdr_itt; |
| 151 | hdr->exp_statsn = r2t->exp_statsn; |
| 152 | hdr->offset = cpu_to_be32(r2t->data_offset + r2t->sent); |
| 153 | if (left > conn->max_xmit_dlength) { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 154 | hton24(hdr->dlength, conn->max_xmit_dlength); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 155 | r2t->data_count = conn->max_xmit_dlength; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 156 | hdr->flags = 0; |
| 157 | } else { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 158 | hton24(hdr->dlength, left); |
| 159 | r2t->data_count = left; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 160 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
| 161 | } |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 162 | conn->dataout_pdus_cnt++; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 163 | } |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 164 | EXPORT_SYMBOL_GPL(iscsi_prep_data_out_pdu); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 165 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 166 | static int iscsi_add_hdr(struct iscsi_task *task, unsigned len) |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 167 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 168 | unsigned exp_len = task->hdr_len + len; |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 169 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 170 | if (exp_len > task->hdr_max) { |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 171 | WARN_ON(1); |
| 172 | return -EINVAL; |
| 173 | } |
| 174 | |
| 175 | WARN_ON(len & (ISCSI_PAD_LEN - 1)); /* caller must pad the AHS */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 176 | task->hdr_len = exp_len; |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 177 | return 0; |
| 178 | } |
| 179 | |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 180 | /* |
| 181 | * make an extended cdb AHS |
| 182 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 183 | static int iscsi_prep_ecdb_ahs(struct iscsi_task *task) |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 184 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 185 | struct scsi_cmnd *cmd = task->sc; |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 186 | unsigned rlen, pad_len; |
| 187 | unsigned short ahslength; |
| 188 | struct iscsi_ecdb_ahdr *ecdb_ahdr; |
| 189 | int rc; |
| 190 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 191 | ecdb_ahdr = iscsi_next_hdr(task); |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 192 | rlen = cmd->cmd_len - ISCSI_CDB_SIZE; |
| 193 | |
| 194 | BUG_ON(rlen > sizeof(ecdb_ahdr->ecdb)); |
| 195 | ahslength = rlen + sizeof(ecdb_ahdr->reserved); |
| 196 | |
| 197 | pad_len = iscsi_padding(rlen); |
| 198 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 199 | rc = iscsi_add_hdr(task, sizeof(ecdb_ahdr->ahslength) + |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 200 | sizeof(ecdb_ahdr->ahstype) + ahslength + pad_len); |
| 201 | if (rc) |
| 202 | return rc; |
| 203 | |
| 204 | if (pad_len) |
| 205 | memset(&ecdb_ahdr->ecdb[rlen], 0, pad_len); |
| 206 | |
| 207 | ecdb_ahdr->ahslength = cpu_to_be16(ahslength); |
| 208 | ecdb_ahdr->ahstype = ISCSI_AHSTYPE_CDB; |
| 209 | ecdb_ahdr->reserved = 0; |
| 210 | memcpy(ecdb_ahdr->ecdb, cmd->cmnd + ISCSI_CDB_SIZE, rlen); |
| 211 | |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 212 | ISCSI_DBG_SESSION(task->conn->session, |
| 213 | "iscsi_prep_ecdb_ahs: varlen_cdb_len %d " |
| 214 | "rlen %d pad_len %d ahs_length %d iscsi_headers_size " |
| 215 | "%u\n", cmd->cmd_len, rlen, pad_len, ahslength, |
| 216 | task->hdr_len); |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 217 | return 0; |
| 218 | } |
| 219 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 220 | static int iscsi_prep_bidi_ahs(struct iscsi_task *task) |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 221 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 222 | struct scsi_cmnd *sc = task->sc; |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 223 | struct iscsi_rlength_ahdr *rlen_ahdr; |
| 224 | int rc; |
| 225 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 226 | rlen_ahdr = iscsi_next_hdr(task); |
| 227 | rc = iscsi_add_hdr(task, sizeof(*rlen_ahdr)); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 228 | if (rc) |
| 229 | return rc; |
| 230 | |
| 231 | rlen_ahdr->ahslength = |
| 232 | cpu_to_be16(sizeof(rlen_ahdr->read_length) + |
| 233 | sizeof(rlen_ahdr->reserved)); |
| 234 | rlen_ahdr->ahstype = ISCSI_AHSTYPE_RLENGTH; |
| 235 | rlen_ahdr->reserved = 0; |
| 236 | rlen_ahdr->read_length = cpu_to_be32(scsi_in(sc)->length); |
| 237 | |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 238 | ISCSI_DBG_SESSION(task->conn->session, |
| 239 | "bidi-in rlen_ahdr->read_length(%d) " |
| 240 | "rlen_ahdr->ahslength(%d)\n", |
| 241 | be32_to_cpu(rlen_ahdr->read_length), |
| 242 | be16_to_cpu(rlen_ahdr->ahslength)); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 243 | return 0; |
| 244 | } |
| 245 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 246 | /** |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 247 | * iscsi_check_tmf_restrictions - check if a task is affected by TMF |
| 248 | * @task: iscsi task |
| 249 | * @opcode: opcode to check for |
| 250 | * |
| 251 | * During TMF a task has to be checked if it's affected. |
| 252 | * All unrelated I/O can be passed through, but I/O to the |
| 253 | * affected LUN should be restricted. |
| 254 | * If 'fast_abort' is set we won't be sending any I/O to the |
| 255 | * affected LUN. |
| 256 | * Otherwise the target is waiting for all TTTs to be completed, |
| 257 | * so we have to send all outstanding Data-Out PDUs to the target. |
| 258 | */ |
| 259 | static int iscsi_check_tmf_restrictions(struct iscsi_task *task, int opcode) |
| 260 | { |
| 261 | struct iscsi_conn *conn = task->conn; |
| 262 | struct iscsi_tm *tmf = &conn->tmhdr; |
| 263 | unsigned int hdr_lun; |
| 264 | |
| 265 | if (conn->tmf_state == TMF_INITIAL) |
| 266 | return 0; |
| 267 | |
| 268 | if ((tmf->opcode & ISCSI_OPCODE_MASK) != ISCSI_OP_SCSI_TMFUNC) |
| 269 | return 0; |
| 270 | |
| 271 | switch (ISCSI_TM_FUNC_VALUE(tmf)) { |
| 272 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: |
| 273 | /* |
| 274 | * Allow PDUs for unrelated LUNs |
| 275 | */ |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 276 | hdr_lun = scsilun_to_int(&tmf->lun); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 277 | if (hdr_lun != task->sc->device->lun) |
| 278 | return 0; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 279 | /* fall through */ |
| 280 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 281 | /* |
| 282 | * Fail all SCSI cmd PDUs |
| 283 | */ |
| 284 | if (opcode != ISCSI_OP_SCSI_DATA_OUT) { |
| 285 | iscsi_conn_printk(KERN_INFO, conn, |
| 286 | "task [op %x/%x itt " |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 287 | "0x%x/0x%x] " |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 288 | "rejected.\n", |
| 289 | task->hdr->opcode, opcode, |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 290 | task->itt, task->hdr_itt); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 291 | return -EACCES; |
| 292 | } |
| 293 | /* |
| 294 | * And also all data-out PDUs in response to R2T |
| 295 | * if fast_abort is set. |
| 296 | */ |
| 297 | if (conn->session->fast_abort) { |
| 298 | iscsi_conn_printk(KERN_INFO, conn, |
| 299 | "task [op %x/%x itt " |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 300 | "0x%x/0x%x] fast abort.\n", |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 301 | task->hdr->opcode, opcode, |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 302 | task->itt, task->hdr_itt); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 303 | return -EACCES; |
| 304 | } |
| 305 | break; |
| 306 | case ISCSI_TM_FUNC_ABORT_TASK: |
| 307 | /* |
| 308 | * the caller has already checked if the task |
| 309 | * they want to abort was in the pending queue so if |
| 310 | * we are here the cmd pdu has gone out already, and |
| 311 | * we will only hit this for data-outs |
| 312 | */ |
| 313 | if (opcode == ISCSI_OP_SCSI_DATA_OUT && |
| 314 | task->hdr_itt == tmf->rtt) { |
| 315 | ISCSI_DBG_SESSION(conn->session, |
| 316 | "Preventing task %x/%x from sending " |
| 317 | "data-out due to abort task in " |
| 318 | "progress\n", task->itt, |
| 319 | task->hdr_itt); |
| 320 | return -EACCES; |
| 321 | } |
| 322 | break; |
| 323 | } |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | /** |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 329 | * iscsi_prep_scsi_cmd_pdu - prep iscsi scsi cmd pdu |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 330 | * @task: iscsi task |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 331 | * |
| 332 | * Prep basic iSCSI PDU fields for a scsi cmd pdu. The LLD should set |
| 333 | * fields like dlength or final based on how much data it sends |
| 334 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 335 | static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 336 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 337 | struct iscsi_conn *conn = task->conn; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 338 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 339 | struct scsi_cmnd *sc = task->sc; |
Nicholas Bellinger | 1235218 | 2011-05-27 11:16:33 +0000 | [diff] [blame] | 340 | struct iscsi_scsi_req *hdr; |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 341 | unsigned hdrlength, cmd_len; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 342 | itt_t itt; |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 343 | int rc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 344 | |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 345 | rc = iscsi_check_tmf_restrictions(task, ISCSI_OP_SCSI_CMD); |
| 346 | if (rc) |
| 347 | return rc; |
| 348 | |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 349 | if (conn->session->tt->alloc_pdu) { |
| 350 | rc = conn->session->tt->alloc_pdu(task, ISCSI_OP_SCSI_CMD); |
| 351 | if (rc) |
| 352 | return rc; |
| 353 | } |
Nicholas Bellinger | 1235218 | 2011-05-27 11:16:33 +0000 | [diff] [blame] | 354 | hdr = (struct iscsi_scsi_req *)task->hdr; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 355 | itt = hdr->itt; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 356 | memset(hdr, 0, sizeof(*hdr)); |
| 357 | |
Mike Christie | 2ff79d5 | 2008-12-02 00:32:14 -0600 | [diff] [blame] | 358 | if (session->tt->parse_pdu_itt) |
| 359 | hdr->itt = task->hdr_itt = itt; |
| 360 | else |
| 361 | hdr->itt = task->hdr_itt = build_itt(task->itt, |
| 362 | task->conn->session->age); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 363 | task->hdr_len = 0; |
| 364 | rc = iscsi_add_hdr(task, sizeof(*hdr)); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 365 | if (rc) |
| 366 | return rc; |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 367 | hdr->opcode = ISCSI_OP_SCSI_CMD; |
| 368 | hdr->flags = ISCSI_ATTR_SIMPLE; |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 369 | int_to_scsilun(sc->device->lun, &hdr->lun); |
| 370 | task->lun = hdr->lun; |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 371 | hdr->exp_statsn = cpu_to_be32(conn->exp_statsn); |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 372 | cmd_len = sc->cmd_len; |
| 373 | if (cmd_len < ISCSI_CDB_SIZE) |
| 374 | memset(&hdr->cdb[cmd_len], 0, ISCSI_CDB_SIZE - cmd_len); |
| 375 | else if (cmd_len > ISCSI_CDB_SIZE) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 376 | rc = iscsi_prep_ecdb_ahs(task); |
Boaz Harrosh | 38d1c06 | 2008-04-18 10:11:51 -0500 | [diff] [blame] | 377 | if (rc) |
| 378 | return rc; |
| 379 | cmd_len = ISCSI_CDB_SIZE; |
| 380 | } |
| 381 | memcpy(hdr->cdb, sc->cmnd, cmd_len); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 382 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 383 | task->imm_count = 0; |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 384 | if (scsi_bidi_cmnd(sc)) { |
| 385 | hdr->flags |= ISCSI_FLAG_CMD_READ; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 386 | rc = iscsi_prep_bidi_ahs(task); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 387 | if (rc) |
| 388 | return rc; |
| 389 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 390 | if (sc->sc_data_direction == DMA_TO_DEVICE) { |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 391 | unsigned out_len = scsi_out(sc)->length; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 392 | struct iscsi_r2t_info *r2t = &task->unsol_r2t; |
| 393 | |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 394 | hdr->data_length = cpu_to_be32(out_len); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 395 | hdr->flags |= ISCSI_FLAG_CMD_WRITE; |
| 396 | /* |
| 397 | * Write counters: |
| 398 | * |
| 399 | * imm_count bytes to be sent right after |
| 400 | * SCSI PDU Header |
| 401 | * |
| 402 | * unsol_count bytes(as Data-Out) to be sent |
| 403 | * without R2T ack right after |
| 404 | * immediate data |
| 405 | * |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 406 | * r2t data_length bytes to be sent via R2T ack's |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 407 | * |
| 408 | * pad_count bytes to be sent as zero-padding |
| 409 | */ |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 410 | memset(r2t, 0, sizeof(*r2t)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 411 | |
| 412 | if (session->imm_data_en) { |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 413 | if (out_len >= session->first_burst) |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 414 | task->imm_count = min(session->first_burst, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 415 | conn->max_xmit_dlength); |
| 416 | else |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 417 | task->imm_count = min(out_len, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 418 | conn->max_xmit_dlength); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 419 | hton24(hdr->dlength, task->imm_count); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 420 | } else |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 421 | zero_data(hdr->dlength); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 422 | |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 423 | if (!session->initial_r2t_en) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 424 | r2t->data_length = min(session->first_burst, out_len) - |
| 425 | task->imm_count; |
| 426 | r2t->data_offset = task->imm_count; |
| 427 | r2t->ttt = cpu_to_be32(ISCSI_RESERVED_TAG); |
| 428 | r2t->exp_statsn = cpu_to_be32(conn->exp_statsn); |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 429 | } |
| 430 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 431 | if (!task->unsol_r2t.data_length) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 432 | /* No unsolicit Data-Out's */ |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 433 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 434 | } else { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 435 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
| 436 | zero_data(hdr->dlength); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 437 | hdr->data_length = cpu_to_be32(scsi_in(sc)->length); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 438 | |
| 439 | if (sc->sc_data_direction == DMA_FROM_DEVICE) |
| 440 | hdr->flags |= ISCSI_FLAG_CMD_READ; |
| 441 | } |
| 442 | |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 443 | /* calculate size of additional header segments (AHSs) */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 444 | hdrlength = task->hdr_len - sizeof(*hdr); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 445 | |
| 446 | WARN_ON(hdrlength & (ISCSI_PAD_LEN-1)); |
| 447 | hdrlength /= ISCSI_PAD_LEN; |
| 448 | |
| 449 | WARN_ON(hdrlength >= 256); |
| 450 | hdr->hlength = hdrlength & 0xFF; |
Mike Christie | 96b1f96 | 2010-04-24 16:21:19 -0500 | [diff] [blame] | 451 | hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 452 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 453 | if (session->tt->init_task && session->tt->init_task(task)) |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 454 | return -EIO; |
| 455 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 456 | task->state = ISCSI_TASK_RUNNING; |
Mike Christie | d3305f3 | 2009-08-20 15:10:58 -0500 | [diff] [blame] | 457 | session->cmdsn++; |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 458 | |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 459 | conn->scsicmd_pdus_cnt++; |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 460 | ISCSI_DBG_SESSION(session, "iscsi prep [%s cid %d sc %p cdb 0x%x " |
| 461 | "itt 0x%x len %d bidi_len %d cmdsn %d win %d]\n", |
| 462 | scsi_bidi_cmnd(sc) ? "bidirectional" : |
| 463 | sc->sc_data_direction == DMA_TO_DEVICE ? |
| 464 | "write" : "read", conn->id, sc, sc->cmnd[0], |
| 465 | task->itt, scsi_bufflen(sc), |
| 466 | scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, |
| 467 | session->cmdsn, |
| 468 | session->max_cmdsn - session->exp_cmdsn + 1); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 469 | return 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 470 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 471 | |
| 472 | /** |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 473 | * iscsi_free_task - free a task |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 474 | * @task: iscsi cmd task |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 475 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 476 | * Must be called with session back_lock. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 477 | * This function returns the scsi command to scsi-ml or cleans |
| 478 | * up mgmt tasks then returns the task to the pool. |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 479 | */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 480 | static void iscsi_free_task(struct iscsi_task *task) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 481 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 482 | struct iscsi_conn *conn = task->conn; |
Mike Christie | c1635cb | 2007-12-13 12:43:33 -0600 | [diff] [blame] | 483 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 484 | struct scsi_cmnd *sc = task->sc; |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 485 | int oldstate = task->state; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 486 | |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 487 | ISCSI_DBG_SESSION(session, "freeing task itt 0x%x state %d sc %p\n", |
| 488 | task->itt, task->state, task->sc); |
| 489 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 490 | session->tt->cleanup_task(task); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 491 | task->state = ISCSI_TASK_FREE; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 492 | task->sc = NULL; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 493 | /* |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 494 | * login task is preallocated so do not free |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 495 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 496 | if (conn->login_task == task) |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 497 | return; |
| 498 | |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 499 | kfifo_in(&session->cmdpool.queue, (void*)&task, sizeof(void*)); |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 500 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 501 | if (sc) { |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 502 | /* SCSI eh reuses commands to verify us */ |
| 503 | sc->SCp.ptr = NULL; |
| 504 | /* |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 505 | * queue command may call this to free the task, so |
| 506 | * it will decide how to return sc to scsi-ml. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 507 | */ |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 508 | if (oldstate != ISCSI_TASK_REQUEUE_SCSIQ) |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 509 | sc->scsi_done(sc); |
| 510 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 511 | } |
| 512 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 513 | void __iscsi_get_task(struct iscsi_task *task) |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 514 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 515 | atomic_inc(&task->refcount); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 516 | } |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 517 | EXPORT_SYMBOL_GPL(__iscsi_get_task); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 518 | |
Eddie Wai | 8eea2f5 | 2010-11-23 15:29:21 -0800 | [diff] [blame] | 519 | void __iscsi_put_task(struct iscsi_task *task) |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 520 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 521 | if (atomic_dec_and_test(&task->refcount)) |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 522 | iscsi_free_task(task); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 523 | } |
Eddie Wai | 8eea2f5 | 2010-11-23 15:29:21 -0800 | [diff] [blame] | 524 | EXPORT_SYMBOL_GPL(__iscsi_put_task); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 525 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 526 | void iscsi_put_task(struct iscsi_task *task) |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 527 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 528 | struct iscsi_session *session = task->conn->session; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 529 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 530 | /* regular RX path uses back_lock */ |
| 531 | spin_lock_bh(&session->back_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 532 | __iscsi_put_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 533 | spin_unlock_bh(&session->back_lock); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 534 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 535 | EXPORT_SYMBOL_GPL(iscsi_put_task); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 536 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 537 | /** |
| 538 | * iscsi_complete_task - finish a task |
| 539 | * @task: iscsi cmd task |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 540 | * @state: state to complete task with |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 541 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 542 | * Must be called with session back_lock. |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 543 | */ |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 544 | static void iscsi_complete_task(struct iscsi_task *task, int state) |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 545 | { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 546 | struct iscsi_conn *conn = task->conn; |
| 547 | |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 548 | ISCSI_DBG_SESSION(conn->session, |
| 549 | "complete task itt 0x%x state %d sc %p\n", |
| 550 | task->itt, task->state, task->sc); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 551 | if (task->state == ISCSI_TASK_COMPLETED || |
| 552 | task->state == ISCSI_TASK_ABRT_TMF || |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 553 | task->state == ISCSI_TASK_ABRT_SESS_RECOV || |
| 554 | task->state == ISCSI_TASK_REQUEUE_SCSIQ) |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 555 | return; |
| 556 | WARN_ON_ONCE(task->state == ISCSI_TASK_FREE); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 557 | task->state = state; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 558 | |
| 559 | if (!list_empty(&task->running)) |
| 560 | list_del_init(&task->running); |
| 561 | |
| 562 | if (conn->task == task) |
| 563 | conn->task = NULL; |
| 564 | |
| 565 | if (conn->ping_task == task) |
| 566 | conn->ping_task = NULL; |
| 567 | |
| 568 | /* release get from queueing */ |
| 569 | __iscsi_put_task(task); |
| 570 | } |
| 571 | |
Mike Christie | 4c0ba5d | 2009-09-05 07:34:23 +0530 | [diff] [blame] | 572 | /** |
| 573 | * iscsi_complete_scsi_task - finish scsi task normally |
| 574 | * @task: iscsi task for scsi cmd |
| 575 | * @exp_cmdsn: expected cmd sn in cpu format |
| 576 | * @max_cmdsn: max cmd sn in cpu format |
| 577 | * |
| 578 | * This is used when drivers do not need or cannot perform |
| 579 | * lower level pdu processing. |
| 580 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 581 | * Called with session back_lock |
Mike Christie | 4c0ba5d | 2009-09-05 07:34:23 +0530 | [diff] [blame] | 582 | */ |
| 583 | void iscsi_complete_scsi_task(struct iscsi_task *task, |
| 584 | uint32_t exp_cmdsn, uint32_t max_cmdsn) |
| 585 | { |
| 586 | struct iscsi_conn *conn = task->conn; |
| 587 | |
| 588 | ISCSI_DBG_SESSION(conn->session, "[itt 0x%x]\n", task->itt); |
| 589 | |
| 590 | conn->last_recv = jiffies; |
| 591 | __iscsi_update_cmdsn(conn->session, exp_cmdsn, max_cmdsn); |
| 592 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
| 593 | } |
| 594 | EXPORT_SYMBOL_GPL(iscsi_complete_scsi_task); |
| 595 | |
| 596 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 597 | /* |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 598 | * session back_lock must be held and if not called for a task that is |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 599 | * still pending or from the xmit thread, then xmit thread must |
| 600 | * be suspended. |
| 601 | */ |
| 602 | static void fail_scsi_task(struct iscsi_task *task, int err) |
| 603 | { |
| 604 | struct iscsi_conn *conn = task->conn; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 605 | struct scsi_cmnd *sc; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 606 | int state; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 607 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 608 | /* |
| 609 | * if a command completes and we get a successful tmf response |
| 610 | * we will hit this because the scsi eh abort code does not take |
| 611 | * a ref to the task. |
| 612 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 613 | sc = task->sc; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 614 | if (!sc) |
| 615 | return; |
| 616 | |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 617 | if (task->state == ISCSI_TASK_PENDING) { |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 618 | /* |
| 619 | * cmd never made it to the xmit thread, so we should not count |
| 620 | * the cmd in the sequencing |
| 621 | */ |
| 622 | conn->session->queued_cmdsn--; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 623 | /* it was never sent so just complete like normal */ |
| 624 | state = ISCSI_TASK_COMPLETED; |
| 625 | } else if (err == DID_TRANSPORT_DISRUPTED) |
| 626 | state = ISCSI_TASK_ABRT_SESS_RECOV; |
| 627 | else |
| 628 | state = ISCSI_TASK_ABRT_TMF; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 629 | |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 630 | sc->result = err << 16; |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 631 | if (!scsi_bidi_cmnd(sc)) |
| 632 | scsi_set_resid(sc, scsi_bufflen(sc)); |
| 633 | else { |
| 634 | scsi_out(sc)->resid = scsi_out(sc)->length; |
| 635 | scsi_in(sc)->resid = scsi_in(sc)->length; |
| 636 | } |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 637 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 638 | /* regular RX path uses back_lock */ |
| 639 | spin_lock_bh(&conn->session->back_lock); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 640 | iscsi_complete_task(task, state); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 641 | spin_unlock_bh(&conn->session->back_lock); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 642 | } |
| 643 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 644 | static int iscsi_prep_mgmt_task(struct iscsi_conn *conn, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 645 | struct iscsi_task *task) |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 646 | { |
| 647 | struct iscsi_session *session = conn->session; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 648 | struct iscsi_hdr *hdr = task->hdr; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 649 | struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr; |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 650 | uint8_t opcode = hdr->opcode & ISCSI_OPCODE_MASK; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 651 | |
| 652 | if (conn->session->state == ISCSI_STATE_LOGGING_OUT) |
| 653 | return -ENOTCONN; |
| 654 | |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 655 | if (opcode != ISCSI_OP_LOGIN && opcode != ISCSI_OP_TEXT) |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 656 | nop->exp_statsn = cpu_to_be32(conn->exp_statsn); |
| 657 | /* |
| 658 | * pre-format CmdSN for outgoing PDU. |
| 659 | */ |
| 660 | nop->cmdsn = cpu_to_be32(session->cmdsn); |
| 661 | if (hdr->itt != RESERVED_ITT) { |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 662 | /* |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 663 | * TODO: We always use immediate for normal session pdus. |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 664 | * If we start to send tmfs or nops as non-immediate then |
| 665 | * we should start checking the cmdsn numbers for mgmt tasks. |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 666 | * |
| 667 | * During discovery sessions iscsid sends TEXT as non immediate, |
| 668 | * but we always only send one PDU at a time. |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 669 | */ |
| 670 | if (conn->c_stage == ISCSI_CONN_STARTED && |
| 671 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
| 672 | session->queued_cmdsn++; |
| 673 | session->cmdsn++; |
| 674 | } |
| 675 | } |
| 676 | |
Mike Christie | ae15f80 | 2008-12-02 00:32:15 -0600 | [diff] [blame] | 677 | if (session->tt->init_task && session->tt->init_task(task)) |
| 678 | return -EIO; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 679 | |
| 680 | if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) |
| 681 | session->state = ISCSI_STATE_LOGGING_OUT; |
| 682 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 683 | task->state = ISCSI_TASK_RUNNING; |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 684 | ISCSI_DBG_SESSION(session, "mgmtpdu [op 0x%x hdr->itt 0x%x " |
| 685 | "datalen %d]\n", hdr->opcode & ISCSI_OPCODE_MASK, |
| 686 | hdr->itt, task->data_count); |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 687 | return 0; |
| 688 | } |
| 689 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 690 | static struct iscsi_task * |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 691 | __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 692 | char *data, uint32_t data_size) |
| 693 | { |
| 694 | struct iscsi_session *session = conn->session; |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 695 | struct iscsi_host *ihost = shost_priv(session->host); |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 696 | uint8_t opcode = hdr->opcode & ISCSI_OPCODE_MASK; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 697 | struct iscsi_task *task; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 698 | itt_t itt; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 699 | |
| 700 | if (session->state == ISCSI_STATE_TERMINATE) |
| 701 | return NULL; |
| 702 | |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 703 | if (opcode == ISCSI_OP_LOGIN || opcode == ISCSI_OP_TEXT) { |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 704 | /* |
| 705 | * Login and Text are sent serially, in |
| 706 | * request-followed-by-response sequence. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 707 | * Same task can be used. Same ITT must be used. |
| 708 | * Note that login_task is preallocated at conn_create(). |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 709 | */ |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 710 | if (conn->login_task->state != ISCSI_TASK_FREE) { |
| 711 | iscsi_conn_printk(KERN_ERR, conn, "Login/Text in " |
| 712 | "progress. Cannot start new task.\n"); |
| 713 | return NULL; |
| 714 | } |
| 715 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 716 | task = conn->login_task; |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 717 | } else { |
Mike Christie | 26013ad | 2009-05-13 17:57:43 -0500 | [diff] [blame] | 718 | if (session->state != ISCSI_STATE_LOGGED_IN) |
| 719 | return NULL; |
| 720 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 721 | BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE); |
| 722 | BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED); |
| 723 | |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 724 | if (!kfifo_out(&session->cmdpool.queue, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 725 | (void*)&task, sizeof(void*))) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 726 | return NULL; |
| 727 | } |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 728 | /* |
| 729 | * released in complete pdu for task we expect a response for, and |
| 730 | * released by the lld when it has transmitted the task for |
| 731 | * pdus we do not expect a response for. |
| 732 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 733 | atomic_set(&task->refcount, 1); |
| 734 | task->conn = conn; |
| 735 | task->sc = NULL; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 736 | INIT_LIST_HEAD(&task->running); |
| 737 | task->state = ISCSI_TASK_PENDING; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 738 | |
| 739 | if (data_size) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 740 | memcpy(task->data, data, data_size); |
| 741 | task->data_count = data_size; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 742 | } else |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 743 | task->data_count = 0; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 744 | |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 745 | if (conn->session->tt->alloc_pdu) { |
| 746 | if (conn->session->tt->alloc_pdu(task, hdr->opcode)) { |
| 747 | iscsi_conn_printk(KERN_ERR, conn, "Could not allocate " |
| 748 | "pdu for mgmt task.\n"); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 749 | goto free_task; |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 750 | } |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 751 | } |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 752 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 753 | itt = task->hdr->itt; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 754 | task->hdr_len = sizeof(struct iscsi_hdr); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 755 | memcpy(task->hdr, hdr, sizeof(struct iscsi_hdr)); |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 756 | |
| 757 | if (hdr->itt != RESERVED_ITT) { |
| 758 | if (session->tt->parse_pdu_itt) |
| 759 | task->hdr->itt = itt; |
| 760 | else |
| 761 | task->hdr->itt = build_itt(task->itt, |
| 762 | task->conn->session->age); |
| 763 | } |
| 764 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 765 | if (!ihost->workq) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 766 | if (iscsi_prep_mgmt_task(conn, task)) |
| 767 | goto free_task; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 768 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 769 | if (session->tt->xmit_task(task)) |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 770 | goto free_task; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 771 | } else { |
| 772 | list_add_tail(&task->running, &conn->mgmtqueue); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 773 | iscsi_conn_queue_work(conn); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 774 | } |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 775 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 776 | return task; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 777 | |
| 778 | free_task: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 779 | /* regular RX path uses back_lock */ |
| 780 | spin_lock_bh(&session->back_lock); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 781 | __iscsi_put_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 782 | spin_unlock_bh(&session->back_lock); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 783 | return NULL; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr, |
| 787 | char *data, uint32_t data_size) |
| 788 | { |
| 789 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 790 | struct iscsi_session *session = conn->session; |
| 791 | int err = 0; |
| 792 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 793 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 794 | if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size)) |
| 795 | err = -EPERM; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 796 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 797 | return err; |
| 798 | } |
| 799 | EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); |
| 800 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 801 | /** |
| 802 | * iscsi_cmd_rsp - SCSI Command Response processing |
| 803 | * @conn: iscsi connection |
| 804 | * @hdr: iscsi header |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 805 | * @task: scsi command task |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 806 | * @data: cmd data buffer |
| 807 | * @datalen: len of buffer |
| 808 | * |
| 809 | * iscsi_cmd_rsp sets up the scsi_cmnd fields based on the PDU and |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 810 | * then completes the command and task. |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 811 | **/ |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 812 | static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 813 | struct iscsi_task *task, char *data, |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 814 | int datalen) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 815 | { |
Nicholas Bellinger | 1235218 | 2011-05-27 11:16:33 +0000 | [diff] [blame] | 816 | struct iscsi_scsi_rsp *rhdr = (struct iscsi_scsi_rsp *)hdr; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 817 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 818 | struct scsi_cmnd *sc = task->sc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 819 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 820 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 821 | conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1; |
| 822 | |
| 823 | sc->result = (DID_OK << 16) | rhdr->cmd_status; |
| 824 | |
| 825 | if (rhdr->response != ISCSI_STATUS_CMD_COMPLETED) { |
| 826 | sc->result = DID_ERROR << 16; |
| 827 | goto out; |
| 828 | } |
| 829 | |
| 830 | if (rhdr->cmd_status == SAM_STAT_CHECK_CONDITION) { |
Mike Christie | 9b80cb4 | 2006-12-17 12:10:28 -0600 | [diff] [blame] | 831 | uint16_t senselen; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 832 | |
| 833 | if (datalen < 2) { |
| 834 | invalid_datalen: |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 835 | iscsi_conn_printk(KERN_ERR, conn, |
| 836 | "Got CHECK_CONDITION but invalid data " |
| 837 | "buffer size of %d\n", datalen); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 838 | sc->result = DID_BAD_TARGET << 16; |
| 839 | goto out; |
| 840 | } |
| 841 | |
Harvey Harrison | 8f333991 | 2008-05-21 15:54:20 -0500 | [diff] [blame] | 842 | senselen = get_unaligned_be16(data); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 843 | if (datalen < senselen) |
| 844 | goto invalid_datalen; |
| 845 | |
| 846 | memcpy(sc->sense_buffer, data + 2, |
Mike Christie | 9b80cb4 | 2006-12-17 12:10:28 -0600 | [diff] [blame] | 847 | min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE)); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 848 | ISCSI_DBG_SESSION(session, "copied %d bytes of sense\n", |
| 849 | min_t(uint16_t, senselen, |
| 850 | SCSI_SENSE_BUFFERSIZE)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 851 | } |
| 852 | |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 853 | if (rhdr->flags & (ISCSI_FLAG_CMD_BIDI_UNDERFLOW | |
| 854 | ISCSI_FLAG_CMD_BIDI_OVERFLOW)) { |
| 855 | int res_count = be32_to_cpu(rhdr->bi_residual_count); |
| 856 | |
| 857 | if (scsi_bidi_cmnd(sc) && res_count > 0 && |
| 858 | (rhdr->flags & ISCSI_FLAG_CMD_BIDI_OVERFLOW || |
| 859 | res_count <= scsi_in(sc)->length)) |
| 860 | scsi_in(sc)->resid = res_count; |
| 861 | else |
| 862 | sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; |
| 863 | } |
| 864 | |
Boaz Harrosh | 7207fea | 2007-12-13 12:43:22 -0600 | [diff] [blame] | 865 | if (rhdr->flags & (ISCSI_FLAG_CMD_UNDERFLOW | |
| 866 | ISCSI_FLAG_CMD_OVERFLOW)) { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 867 | int res_count = be32_to_cpu(rhdr->residual_count); |
| 868 | |
Boaz Harrosh | 7207fea | 2007-12-13 12:43:22 -0600 | [diff] [blame] | 869 | if (res_count > 0 && |
| 870 | (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW || |
| 871 | res_count <= scsi_bufflen(sc))) |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 872 | /* write side for bidi or uni-io set_resid */ |
FUJITA Tomonori | 1c13899 | 2007-06-14 22:13:17 +0900 | [diff] [blame] | 873 | scsi_set_resid(sc, res_count); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 874 | else |
| 875 | sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 876 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 877 | out: |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 878 | ISCSI_DBG_SESSION(session, "cmd rsp done [sc %p res %d itt 0x%x]\n", |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 879 | sc, sc->result, task->itt); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 880 | conn->scsirsp_pdus_cnt++; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 881 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 882 | } |
| 883 | |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 884 | /** |
| 885 | * iscsi_data_in_rsp - SCSI Data-In Response processing |
| 886 | * @conn: iscsi connection |
| 887 | * @hdr: iscsi pdu |
| 888 | * @task: scsi command task |
| 889 | **/ |
| 890 | static void |
| 891 | iscsi_data_in_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 892 | struct iscsi_task *task) |
| 893 | { |
| 894 | struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)hdr; |
| 895 | struct scsi_cmnd *sc = task->sc; |
| 896 | |
| 897 | if (!(rhdr->flags & ISCSI_FLAG_DATA_STATUS)) |
| 898 | return; |
| 899 | |
Mike Christie | edbc9aa05 | 2009-05-13 17:57:42 -0500 | [diff] [blame] | 900 | iscsi_update_cmdsn(conn->session, (struct iscsi_nopin *)hdr); |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 901 | sc->result = (DID_OK << 16) | rhdr->cmd_status; |
| 902 | conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1; |
| 903 | if (rhdr->flags & (ISCSI_FLAG_DATA_UNDERFLOW | |
| 904 | ISCSI_FLAG_DATA_OVERFLOW)) { |
| 905 | int res_count = be32_to_cpu(rhdr->residual_count); |
| 906 | |
| 907 | if (res_count > 0 && |
| 908 | (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW || |
| 909 | res_count <= scsi_in(sc)->length)) |
| 910 | scsi_in(sc)->resid = res_count; |
| 911 | else |
| 912 | sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; |
| 913 | } |
| 914 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 915 | ISCSI_DBG_SESSION(conn->session, "data in with status done " |
| 916 | "[sc %p res %d itt 0x%x]\n", |
| 917 | sc, sc->result, task->itt); |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 918 | conn->scsirsp_pdus_cnt++; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 919 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 920 | } |
| 921 | |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 922 | static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) |
| 923 | { |
| 924 | struct iscsi_tm_rsp *tmf = (struct iscsi_tm_rsp *)hdr; |
| 925 | |
| 926 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
| 927 | conn->tmfrsp_pdus_cnt++; |
| 928 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 929 | if (conn->tmf_state != TMF_QUEUED) |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 930 | return; |
| 931 | |
| 932 | if (tmf->response == ISCSI_TMF_RSP_COMPLETE) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 933 | conn->tmf_state = TMF_SUCCESS; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 934 | else if (tmf->response == ISCSI_TMF_RSP_NO_TASK) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 935 | conn->tmf_state = TMF_NOT_FOUND; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 936 | else |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 937 | conn->tmf_state = TMF_FAILED; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 938 | wake_up(&conn->ehwait); |
| 939 | } |
| 940 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 941 | static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) |
| 942 | { |
| 943 | struct iscsi_nopout hdr; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 944 | struct iscsi_task *task; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 945 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 946 | if (!rhdr && conn->ping_task) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 947 | return; |
| 948 | |
| 949 | memset(&hdr, 0, sizeof(struct iscsi_nopout)); |
| 950 | hdr.opcode = ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE; |
| 951 | hdr.flags = ISCSI_FLAG_CMD_FINAL; |
| 952 | |
| 953 | if (rhdr) { |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 954 | hdr.lun = rhdr->lun; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 955 | hdr.ttt = rhdr->ttt; |
| 956 | hdr.itt = RESERVED_ITT; |
| 957 | } else |
| 958 | hdr.ttt = RESERVED_ITT; |
| 959 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 960 | task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); |
| 961 | if (!task) |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 962 | iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n"); |
Mike Christie | d3acf02 | 2008-12-01 12:13:00 -0600 | [diff] [blame] | 963 | else if (!rhdr) { |
| 964 | /* only track our nops */ |
| 965 | conn->ping_task = task; |
| 966 | conn->last_ping = jiffies; |
| 967 | } |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 968 | } |
| 969 | |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 970 | static int iscsi_nop_out_rsp(struct iscsi_task *task, |
| 971 | struct iscsi_nopin *nop, char *data, int datalen) |
| 972 | { |
| 973 | struct iscsi_conn *conn = task->conn; |
| 974 | int rc = 0; |
| 975 | |
| 976 | if (conn->ping_task != task) { |
| 977 | /* |
| 978 | * If this is not in response to one of our |
| 979 | * nops then it must be from userspace. |
| 980 | */ |
| 981 | if (iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *)nop, |
| 982 | data, datalen)) |
| 983 | rc = ISCSI_ERR_CONN_FAILED; |
| 984 | } else |
| 985 | mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout); |
| 986 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
| 987 | return rc; |
| 988 | } |
| 989 | |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 990 | static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 991 | char *data, int datalen) |
| 992 | { |
| 993 | struct iscsi_reject *reject = (struct iscsi_reject *)hdr; |
| 994 | struct iscsi_hdr rejected_pdu; |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 995 | int opcode, rc = 0; |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 996 | |
| 997 | conn->exp_statsn = be32_to_cpu(reject->statsn) + 1; |
| 998 | |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 999 | if (ntoh24(reject->dlength) > datalen || |
| 1000 | ntoh24(reject->dlength) < sizeof(struct iscsi_hdr)) { |
| 1001 | iscsi_conn_printk(KERN_ERR, conn, "Cannot handle rejected " |
| 1002 | "pdu. Invalid data length (pdu dlength " |
| 1003 | "%u, datalen %d\n", ntoh24(reject->dlength), |
| 1004 | datalen); |
| 1005 | return ISCSI_ERR_PROTO; |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1006 | } |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1007 | memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr)); |
| 1008 | opcode = rejected_pdu.opcode & ISCSI_OPCODE_MASK; |
| 1009 | |
| 1010 | switch (reject->reason) { |
| 1011 | case ISCSI_REASON_DATA_DIGEST_ERROR: |
| 1012 | iscsi_conn_printk(KERN_ERR, conn, |
| 1013 | "pdu (op 0x%x itt 0x%x) rejected " |
| 1014 | "due to DataDigest error.\n", |
Vaughan Cao | e5dbbe2 | 2014-01-09 10:21:34 +0800 | [diff] [blame] | 1015 | opcode, rejected_pdu.itt); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1016 | break; |
| 1017 | case ISCSI_REASON_IMM_CMD_REJECT: |
| 1018 | iscsi_conn_printk(KERN_ERR, conn, |
| 1019 | "pdu (op 0x%x itt 0x%x) rejected. Too many " |
| 1020 | "immediate commands.\n", |
Vaughan Cao | e5dbbe2 | 2014-01-09 10:21:34 +0800 | [diff] [blame] | 1021 | opcode, rejected_pdu.itt); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1022 | /* |
| 1023 | * We only send one TMF at a time so if the target could not |
| 1024 | * handle it, then it should get fixed (RFC mandates that |
| 1025 | * a target can handle one immediate TMF per conn). |
| 1026 | * |
| 1027 | * For nops-outs, we could have sent more than one if |
| 1028 | * the target is sending us lots of nop-ins |
| 1029 | */ |
| 1030 | if (opcode != ISCSI_OP_NOOP_OUT) |
| 1031 | return 0; |
| 1032 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1033 | if (rejected_pdu.itt == cpu_to_be32(ISCSI_RESERVED_TAG)) { |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1034 | /* |
| 1035 | * nop-out in response to target's nop-out rejected. |
| 1036 | * Just resend. |
| 1037 | */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1038 | /* In RX path we are under back lock */ |
| 1039 | spin_unlock(&conn->session->back_lock); |
| 1040 | spin_lock(&conn->session->frwd_lock); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1041 | iscsi_send_nopout(conn, |
| 1042 | (struct iscsi_nopin*)&rejected_pdu); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1043 | spin_unlock(&conn->session->frwd_lock); |
| 1044 | spin_lock(&conn->session->back_lock); |
| 1045 | } else { |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1046 | struct iscsi_task *task; |
| 1047 | /* |
| 1048 | * Our nop as ping got dropped. We know the target |
| 1049 | * and transport are ok so just clean up |
| 1050 | */ |
| 1051 | task = iscsi_itt_to_task(conn, rejected_pdu.itt); |
| 1052 | if (!task) { |
| 1053 | iscsi_conn_printk(KERN_ERR, conn, |
| 1054 | "Invalid pdu reject. Could " |
| 1055 | "not lookup rejected task.\n"); |
| 1056 | rc = ISCSI_ERR_BAD_ITT; |
| 1057 | } else |
| 1058 | rc = iscsi_nop_out_rsp(task, |
| 1059 | (struct iscsi_nopin*)&rejected_pdu, |
| 1060 | NULL, 0); |
| 1061 | } |
| 1062 | break; |
| 1063 | default: |
| 1064 | iscsi_conn_printk(KERN_ERR, conn, |
| 1065 | "pdu (op 0x%x itt 0x%x) rejected. Reason " |
Vaughan Cao | e5dbbe2 | 2014-01-09 10:21:34 +0800 | [diff] [blame] | 1066 | "code 0x%x\n", rejected_pdu.opcode, |
| 1067 | rejected_pdu.itt, reject->reason); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1068 | break; |
| 1069 | } |
| 1070 | return rc; |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1071 | } |
| 1072 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1073 | /** |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1074 | * iscsi_itt_to_task - look up task by itt |
| 1075 | * @conn: iscsi connection |
| 1076 | * @itt: itt |
| 1077 | * |
| 1078 | * This should be used for mgmt tasks like login and nops, or if |
| 1079 | * the LDD's itt space does not include the session age. |
| 1080 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1081 | * The session back_lock must be held. |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1082 | */ |
Mike Christie | 8f9256c | 2009-05-13 17:57:41 -0500 | [diff] [blame] | 1083 | struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *conn, itt_t itt) |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1084 | { |
| 1085 | struct iscsi_session *session = conn->session; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1086 | int i; |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1087 | |
| 1088 | if (itt == RESERVED_ITT) |
| 1089 | return NULL; |
| 1090 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1091 | if (session->tt->parse_pdu_itt) |
| 1092 | session->tt->parse_pdu_itt(conn, itt, &i, NULL); |
| 1093 | else |
| 1094 | i = get_itt(itt); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1095 | if (i >= session->cmds_max) |
| 1096 | return NULL; |
| 1097 | |
| 1098 | return session->cmds[i]; |
| 1099 | } |
Mike Christie | 8f9256c | 2009-05-13 17:57:41 -0500 | [diff] [blame] | 1100 | EXPORT_SYMBOL_GPL(iscsi_itt_to_task); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1101 | |
| 1102 | /** |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1103 | * __iscsi_complete_pdu - complete pdu |
| 1104 | * @conn: iscsi conn |
| 1105 | * @hdr: iscsi header |
| 1106 | * @data: data buffer |
| 1107 | * @datalen: len of data buffer |
| 1108 | * |
| 1109 | * Completes pdu processing by freeing any resources allocated at |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1110 | * queuecommand or send generic. session back_lock must be held and verify |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1111 | * itt must have been called. |
| 1112 | */ |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1113 | int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 1114 | char *data, int datalen) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1115 | { |
| 1116 | struct iscsi_session *session = conn->session; |
| 1117 | int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1118 | struct iscsi_task *task; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1119 | uint32_t itt; |
| 1120 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1121 | conn->last_recv = jiffies; |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1122 | rc = iscsi_verify_itt(conn, hdr->itt); |
| 1123 | if (rc) |
| 1124 | return rc; |
| 1125 | |
Al Viro | b437735 | 2007-02-09 16:39:40 +0000 | [diff] [blame] | 1126 | if (hdr->itt != RESERVED_ITT) |
| 1127 | itt = get_itt(hdr->itt); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1128 | else |
Al Viro | b437735 | 2007-02-09 16:39:40 +0000 | [diff] [blame] | 1129 | itt = ~0U; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1130 | |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1131 | ISCSI_DBG_SESSION(session, "[op 0x%x cid %d itt 0x%x len %d]\n", |
| 1132 | opcode, conn->id, itt, datalen); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1133 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1134 | if (itt == ~0U) { |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1135 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1136 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1137 | switch(opcode) { |
| 1138 | case ISCSI_OP_NOOP_IN: |
Mike Christie | 40527af | 2006-07-24 15:47:45 -0500 | [diff] [blame] | 1139 | if (datalen) { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1140 | rc = ISCSI_ERR_PROTO; |
Mike Christie | 40527af | 2006-07-24 15:47:45 -0500 | [diff] [blame] | 1141 | break; |
| 1142 | } |
| 1143 | |
Al Viro | b437735 | 2007-02-09 16:39:40 +0000 | [diff] [blame] | 1144 | if (hdr->ttt == cpu_to_be32(ISCSI_RESERVED_TAG)) |
Mike Christie | 40527af | 2006-07-24 15:47:45 -0500 | [diff] [blame] | 1145 | break; |
| 1146 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1147 | /* In RX path we are under back lock */ |
| 1148 | spin_unlock(&session->back_lock); |
| 1149 | spin_lock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1150 | iscsi_send_nopout(conn, (struct iscsi_nopin*)hdr); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1151 | spin_unlock(&session->frwd_lock); |
| 1152 | spin_lock(&session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1153 | break; |
| 1154 | case ISCSI_OP_REJECT: |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1155 | rc = iscsi_handle_reject(conn, hdr, data, datalen); |
| 1156 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1157 | case ISCSI_OP_ASYNC_EVENT: |
Mike Christie | 8d2860b | 2006-05-02 19:46:47 -0500 | [diff] [blame] | 1158 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
Mike Christie | 5831c73 | 2006-10-16 18:09:41 -0400 | [diff] [blame] | 1159 | if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) |
| 1160 | rc = ISCSI_ERR_CONN_FAILED; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1161 | break; |
| 1162 | default: |
| 1163 | rc = ISCSI_ERR_BAD_OPCODE; |
| 1164 | break; |
| 1165 | } |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1166 | goto out; |
| 1167 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1168 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1169 | switch(opcode) { |
| 1170 | case ISCSI_OP_SCSI_CMD_RSP: |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1171 | case ISCSI_OP_SCSI_DATA_IN: |
| 1172 | task = iscsi_itt_to_ctask(conn, hdr->itt); |
| 1173 | if (!task) |
| 1174 | return ISCSI_ERR_BAD_ITT; |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1175 | task->last_xfer = jiffies; |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1176 | break; |
| 1177 | case ISCSI_OP_R2T: |
| 1178 | /* |
| 1179 | * LLD handles R2Ts if they need to. |
| 1180 | */ |
| 1181 | return 0; |
| 1182 | case ISCSI_OP_LOGOUT_RSP: |
| 1183 | case ISCSI_OP_LOGIN_RSP: |
| 1184 | case ISCSI_OP_TEXT_RSP: |
| 1185 | case ISCSI_OP_SCSI_TMFUNC_RSP: |
| 1186 | case ISCSI_OP_NOOP_IN: |
| 1187 | task = iscsi_itt_to_task(conn, hdr->itt); |
| 1188 | if (!task) |
| 1189 | return ISCSI_ERR_BAD_ITT; |
| 1190 | break; |
| 1191 | default: |
| 1192 | return ISCSI_ERR_BAD_OPCODE; |
| 1193 | } |
| 1194 | |
| 1195 | switch(opcode) { |
| 1196 | case ISCSI_OP_SCSI_CMD_RSP: |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1197 | iscsi_scsi_cmd_rsp(conn, hdr, task, data, datalen); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1198 | break; |
| 1199 | case ISCSI_OP_SCSI_DATA_IN: |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 1200 | iscsi_data_in_rsp(conn, hdr, task); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1201 | break; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1202 | case ISCSI_OP_LOGOUT_RSP: |
| 1203 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1204 | if (datalen) { |
| 1205 | rc = ISCSI_ERR_PROTO; |
| 1206 | break; |
| 1207 | } |
| 1208 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
| 1209 | goto recv_pdu; |
| 1210 | case ISCSI_OP_LOGIN_RSP: |
| 1211 | case ISCSI_OP_TEXT_RSP: |
| 1212 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1213 | /* |
| 1214 | * login related PDU's exp_statsn is handled in |
| 1215 | * userspace |
| 1216 | */ |
| 1217 | goto recv_pdu; |
| 1218 | case ISCSI_OP_SCSI_TMFUNC_RSP: |
| 1219 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1220 | if (datalen) { |
| 1221 | rc = ISCSI_ERR_PROTO; |
| 1222 | break; |
| 1223 | } |
| 1224 | |
| 1225 | iscsi_tmf_rsp(conn, hdr); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1226 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1227 | break; |
| 1228 | case ISCSI_OP_NOOP_IN: |
| 1229 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1230 | if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) { |
| 1231 | rc = ISCSI_ERR_PROTO; |
| 1232 | break; |
| 1233 | } |
| 1234 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
| 1235 | |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1236 | rc = iscsi_nop_out_rsp(task, (struct iscsi_nopin*)hdr, |
| 1237 | data, datalen); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1238 | break; |
| 1239 | default: |
| 1240 | rc = ISCSI_ERR_BAD_OPCODE; |
| 1241 | break; |
| 1242 | } |
| 1243 | |
| 1244 | out: |
| 1245 | return rc; |
| 1246 | recv_pdu: |
| 1247 | if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) |
| 1248 | rc = ISCSI_ERR_CONN_FAILED; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1249 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1250 | return rc; |
| 1251 | } |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1252 | EXPORT_SYMBOL_GPL(__iscsi_complete_pdu); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1253 | |
| 1254 | int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 1255 | char *data, int datalen) |
| 1256 | { |
| 1257 | int rc; |
| 1258 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1259 | spin_lock(&conn->session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1260 | rc = __iscsi_complete_pdu(conn, hdr, data, datalen); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1261 | spin_unlock(&conn->session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1262 | return rc; |
| 1263 | } |
| 1264 | EXPORT_SYMBOL_GPL(iscsi_complete_pdu); |
| 1265 | |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1266 | int iscsi_verify_itt(struct iscsi_conn *conn, itt_t itt) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1267 | { |
| 1268 | struct iscsi_session *session = conn->session; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1269 | int age = 0, i = 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1270 | |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1271 | if (itt == RESERVED_ITT) |
| 1272 | return 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1273 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1274 | if (session->tt->parse_pdu_itt) |
| 1275 | session->tt->parse_pdu_itt(conn, itt, &i, &age); |
| 1276 | else { |
| 1277 | i = get_itt(itt); |
| 1278 | age = ((__force u32)itt >> ISCSI_AGE_SHIFT) & ISCSI_AGE_MASK; |
| 1279 | } |
| 1280 | |
| 1281 | if (age != session->age) { |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1282 | iscsi_conn_printk(KERN_ERR, conn, |
| 1283 | "received itt %x expected session age (%x)\n", |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1284 | (__force u32)itt, session->age); |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1285 | return ISCSI_ERR_BAD_ITT; |
| 1286 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1287 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1288 | if (i >= session->cmds_max) { |
| 1289 | iscsi_conn_printk(KERN_ERR, conn, |
| 1290 | "received invalid itt index %u (max cmds " |
| 1291 | "%u.\n", i, session->cmds_max); |
| 1292 | return ISCSI_ERR_BAD_ITT; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1293 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1294 | return 0; |
| 1295 | } |
| 1296 | EXPORT_SYMBOL_GPL(iscsi_verify_itt); |
| 1297 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1298 | /** |
| 1299 | * iscsi_itt_to_ctask - look up ctask by itt |
| 1300 | * @conn: iscsi connection |
| 1301 | * @itt: itt |
| 1302 | * |
| 1303 | * This should be used for cmd tasks. |
| 1304 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1305 | * The session back_lock must be held. |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1306 | */ |
| 1307 | struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *conn, itt_t itt) |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1308 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1309 | struct iscsi_task *task; |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1310 | |
| 1311 | if (iscsi_verify_itt(conn, itt)) |
| 1312 | return NULL; |
| 1313 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1314 | task = iscsi_itt_to_task(conn, itt); |
| 1315 | if (!task || !task->sc) |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1316 | return NULL; |
| 1317 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1318 | if (task->sc->SCp.phase != conn->session->age) { |
| 1319 | iscsi_session_printk(KERN_ERR, conn->session, |
| 1320 | "task's session age %d, expected %d\n", |
| 1321 | task->sc->SCp.phase, conn->session->age); |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1322 | return NULL; |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1323 | } |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1324 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1325 | return task; |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1326 | } |
| 1327 | EXPORT_SYMBOL_GPL(iscsi_itt_to_ctask); |
| 1328 | |
Mike Christie | 40a06e7 | 2009-03-05 14:46:05 -0600 | [diff] [blame] | 1329 | void iscsi_session_failure(struct iscsi_session *session, |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1330 | enum iscsi_err err) |
| 1331 | { |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1332 | struct iscsi_conn *conn; |
| 1333 | struct device *dev; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1334 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1335 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1336 | conn = session->leadconn; |
| 1337 | if (session->state == ISCSI_STATE_TERMINATE || !conn) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1338 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1339 | return; |
| 1340 | } |
| 1341 | |
| 1342 | dev = get_device(&conn->cls_conn->dev); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1343 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1344 | if (!dev) |
| 1345 | return; |
| 1346 | /* |
| 1347 | * if the host is being removed bypass the connection |
| 1348 | * recovery initialization because we are going to kill |
| 1349 | * the session. |
| 1350 | */ |
| 1351 | if (err == ISCSI_ERR_INVALID_HOST) |
| 1352 | iscsi_conn_error_event(conn->cls_conn, err); |
| 1353 | else |
| 1354 | iscsi_conn_failure(conn, err); |
| 1355 | put_device(dev); |
| 1356 | } |
| 1357 | EXPORT_SYMBOL_GPL(iscsi_session_failure); |
| 1358 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1359 | void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) |
| 1360 | { |
| 1361 | struct iscsi_session *session = conn->session; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1362 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1363 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1364 | if (session->state == ISCSI_STATE_FAILED) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1365 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1366 | return; |
| 1367 | } |
| 1368 | |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 1369 | if (conn->stop_stage == 0) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1370 | session->state = ISCSI_STATE_FAILED; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1371 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1372 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1373 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
| 1374 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1375 | iscsi_conn_error_event(conn->cls_conn, err); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1376 | } |
| 1377 | EXPORT_SYMBOL_GPL(iscsi_conn_failure); |
| 1378 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1379 | static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn) |
| 1380 | { |
| 1381 | struct iscsi_session *session = conn->session; |
| 1382 | |
| 1383 | /* |
| 1384 | * Check for iSCSI window and take care of CmdSN wrap-around |
| 1385 | */ |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 1386 | if (!iscsi_sna_lte(session->queued_cmdsn, session->max_cmdsn)) { |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1387 | ISCSI_DBG_SESSION(session, "iSCSI CmdSN closed. ExpCmdSn " |
| 1388 | "%u MaxCmdSN %u CmdSN %u/%u\n", |
| 1389 | session->exp_cmdsn, session->max_cmdsn, |
| 1390 | session->cmdsn, session->queued_cmdsn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1391 | return -ENOSPC; |
| 1392 | } |
| 1393 | return 0; |
| 1394 | } |
| 1395 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1396 | static int iscsi_xmit_task(struct iscsi_conn *conn) |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1397 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1398 | struct iscsi_task *task = conn->task; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1399 | int rc; |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1400 | |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1401 | if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) |
| 1402 | return -ENODATA; |
| 1403 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1404 | __iscsi_get_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1405 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1406 | rc = conn->session->tt->xmit_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1407 | spin_lock_bh(&conn->session->frwd_lock); |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1408 | if (!rc) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1409 | /* done with this task */ |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1410 | task->last_xfer = jiffies; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1411 | conn->task = NULL; |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1412 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1413 | /* regular RX path uses back_lock */ |
| 1414 | spin_lock_bh(&conn->session->back_lock); |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1415 | __iscsi_put_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1416 | spin_unlock_bh(&conn->session->back_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1417 | return rc; |
| 1418 | } |
| 1419 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1420 | /** |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1421 | * iscsi_requeue_task - requeue task to run from session workqueue |
| 1422 | * @task: task to requeue |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1423 | * |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1424 | * LLDs that need to run a task from the session workqueue should call |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1425 | * this. The session frwd_lock must be held. This should only be called |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1426 | * by software drivers. |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1427 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1428 | void iscsi_requeue_task(struct iscsi_task *task) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1429 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1430 | struct iscsi_conn *conn = task->conn; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1431 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1432 | /* |
| 1433 | * this may be on the requeue list already if the xmit_task callout |
| 1434 | * is handling the r2ts while we are adding new ones |
| 1435 | */ |
| 1436 | if (list_empty(&task->running)) |
| 1437 | list_add_tail(&task->running, &conn->requeue); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1438 | iscsi_conn_queue_work(conn); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1439 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1440 | EXPORT_SYMBOL_GPL(iscsi_requeue_task); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1441 | |
| 1442 | /** |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1443 | * iscsi_data_xmit - xmit any command into the scheduled connection |
| 1444 | * @conn: iscsi connection |
| 1445 | * |
| 1446 | * Notes: |
| 1447 | * The function can return -EAGAIN in which case the caller must |
| 1448 | * re-schedule it again later or recover. '0' return code means |
| 1449 | * successful xmit. |
| 1450 | **/ |
| 1451 | static int iscsi_data_xmit(struct iscsi_conn *conn) |
| 1452 | { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1453 | struct iscsi_task *task; |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1454 | int rc = 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1455 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1456 | spin_lock_bh(&conn->session->frwd_lock); |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1457 | if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) { |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1458 | ISCSI_DBG_SESSION(conn->session, "Tx suspended!\n"); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1459 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1460 | return -ENODATA; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1461 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1462 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1463 | if (conn->task) { |
| 1464 | rc = iscsi_xmit_task(conn); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1465 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1466 | goto done; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1467 | } |
| 1468 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1469 | /* |
| 1470 | * process mgmt pdus like nops before commands since we should |
| 1471 | * only have one nop-out as a ping from us and targets should not |
| 1472 | * overflow us with nop-ins |
| 1473 | */ |
| 1474 | check_mgmt: |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1475 | while (!list_empty(&conn->mgmtqueue)) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1476 | conn->task = list_entry(conn->mgmtqueue.next, |
| 1477 | struct iscsi_task, running); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1478 | list_del_init(&conn->task->running); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1479 | if (iscsi_prep_mgmt_task(conn, conn->task)) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1480 | /* regular RX path uses back_lock */ |
| 1481 | spin_lock_bh(&conn->session->back_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1482 | __iscsi_put_task(conn->task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1483 | spin_unlock_bh(&conn->session->back_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1484 | conn->task = NULL; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1485 | continue; |
| 1486 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1487 | rc = iscsi_xmit_task(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1488 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1489 | goto done; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1490 | } |
| 1491 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1492 | /* process pending command queue */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1493 | while (!list_empty(&conn->cmdqueue)) { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1494 | conn->task = list_entry(conn->cmdqueue.next, struct iscsi_task, |
| 1495 | running); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1496 | list_del_init(&conn->task->running); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1497 | if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1498 | fail_scsi_task(conn->task, DID_IMM_RETRY); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1499 | continue; |
| 1500 | } |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1501 | rc = iscsi_prep_scsi_cmd_pdu(conn->task); |
| 1502 | if (rc) { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1503 | if (rc == -ENOMEM || rc == -EACCES) { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1504 | list_add_tail(&conn->task->running, |
| 1505 | &conn->cmdqueue); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1506 | conn->task = NULL; |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1507 | goto done; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1508 | } else |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1509 | fail_scsi_task(conn->task, DID_ABORT); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 1510 | continue; |
| 1511 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1512 | rc = iscsi_xmit_task(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1513 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1514 | goto done; |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1515 | /* |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1516 | * we could continuously get new task requests so |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1517 | * we need to check the mgmt queue for nops that need to |
| 1518 | * be sent to aviod starvation |
| 1519 | */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1520 | if (!list_empty(&conn->mgmtqueue)) |
| 1521 | goto check_mgmt; |
| 1522 | } |
| 1523 | |
| 1524 | while (!list_empty(&conn->requeue)) { |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1525 | /* |
| 1526 | * we always do fastlogout - conn stop code will clean up. |
| 1527 | */ |
| 1528 | if (conn->session->state == ISCSI_STATE_LOGGING_OUT) |
| 1529 | break; |
| 1530 | |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1531 | task = list_entry(conn->requeue.next, struct iscsi_task, |
| 1532 | running); |
| 1533 | if (iscsi_check_tmf_restrictions(task, ISCSI_OP_SCSI_DATA_OUT)) |
| 1534 | break; |
| 1535 | |
| 1536 | conn->task = task; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1537 | list_del_init(&conn->task->running); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1538 | conn->task->state = ISCSI_TASK_RUNNING; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1539 | rc = iscsi_xmit_task(conn); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1540 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1541 | goto done; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1542 | if (!list_empty(&conn->mgmtqueue)) |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1543 | goto check_mgmt; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1544 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1545 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1546 | return -ENODATA; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1547 | |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1548 | done: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1549 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1550 | return rc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1551 | } |
| 1552 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1553 | static void iscsi_xmitworker(struct work_struct *work) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1554 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1555 | struct iscsi_conn *conn = |
| 1556 | container_of(work, struct iscsi_conn, xmitwork); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1557 | int rc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1558 | /* |
| 1559 | * serialize Xmit worker on a per-connection basis. |
| 1560 | */ |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1561 | do { |
| 1562 | rc = iscsi_data_xmit(conn); |
| 1563 | } while (rc >= 0 || rc == -EAGAIN); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1564 | } |
| 1565 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1566 | static inline struct iscsi_task *iscsi_alloc_task(struct iscsi_conn *conn, |
| 1567 | struct scsi_cmnd *sc) |
| 1568 | { |
| 1569 | struct iscsi_task *task; |
| 1570 | |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 1571 | if (!kfifo_out(&conn->session->cmdpool.queue, |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1572 | (void *) &task, sizeof(void *))) |
| 1573 | return NULL; |
| 1574 | |
| 1575 | sc->SCp.phase = conn->session->age; |
| 1576 | sc->SCp.ptr = (char *) task; |
| 1577 | |
| 1578 | atomic_set(&task->refcount, 1); |
| 1579 | task->state = ISCSI_TASK_PENDING; |
| 1580 | task->conn = conn; |
| 1581 | task->sc = sc; |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1582 | task->have_checked_conn = false; |
| 1583 | task->last_timeout = jiffies; |
| 1584 | task->last_xfer = jiffies; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1585 | INIT_LIST_HEAD(&task->running); |
| 1586 | return task; |
| 1587 | } |
| 1588 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1589 | enum { |
| 1590 | FAILURE_BAD_HOST = 1, |
| 1591 | FAILURE_SESSION_FAILED, |
| 1592 | FAILURE_SESSION_FREED, |
| 1593 | FAILURE_WINDOW_CLOSED, |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 1594 | FAILURE_OOM, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1595 | FAILURE_SESSION_TERMINATE, |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1596 | FAILURE_SESSION_IN_RECOVERY, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1597 | FAILURE_SESSION_RECOVERY_TIMEOUT, |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1598 | FAILURE_SESSION_LOGGING_OUT, |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1599 | FAILURE_SESSION_NOT_READY, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1600 | }; |
| 1601 | |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1602 | int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1603 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1604 | struct iscsi_cls_session *cls_session; |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1605 | struct iscsi_host *ihost; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1606 | int reason = 0; |
| 1607 | struct iscsi_session *session; |
| 1608 | struct iscsi_conn *conn; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1609 | struct iscsi_task *task = NULL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1610 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1611 | sc->result = 0; |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 1612 | sc->SCp.ptr = NULL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1613 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1614 | ihost = shost_priv(host); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1615 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1616 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 1617 | session = cls_session->dd_data; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1618 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1619 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1620 | reason = iscsi_session_chkready(cls_session); |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1621 | if (reason) { |
| 1622 | sc->result = reason; |
| 1623 | goto fault; |
| 1624 | } |
| 1625 | |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1626 | if (session->state != ISCSI_STATE_LOGGED_IN) { |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1627 | /* |
| 1628 | * to handle the race between when we set the recovery state |
| 1629 | * and block the session we requeue here (commands could |
| 1630 | * be entering our queuecommand while a block is starting |
| 1631 | * up because the block code is not locked) |
| 1632 | */ |
Mike Christie | 9000bcd | 2007-12-13 12:43:32 -0600 | [diff] [blame] | 1633 | switch (session->state) { |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1634 | case ISCSI_STATE_FAILED: |
Mike Christie | 9000bcd | 2007-12-13 12:43:32 -0600 | [diff] [blame] | 1635 | case ISCSI_STATE_IN_RECOVERY: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1636 | reason = FAILURE_SESSION_IN_RECOVERY; |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1637 | sc->result = DID_IMM_RETRY << 16; |
| 1638 | break; |
Mike Christie | 9000bcd | 2007-12-13 12:43:32 -0600 | [diff] [blame] | 1639 | case ISCSI_STATE_LOGGING_OUT: |
| 1640 | reason = FAILURE_SESSION_LOGGING_OUT; |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1641 | sc->result = DID_IMM_RETRY << 16; |
| 1642 | break; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1643 | case ISCSI_STATE_RECOVERY_FAILED: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1644 | reason = FAILURE_SESSION_RECOVERY_TIMEOUT; |
Mike Christie | 56d7fcf | 2008-08-19 18:45:26 -0500 | [diff] [blame] | 1645 | sc->result = DID_TRANSPORT_FAILFAST << 16; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1646 | break; |
| 1647 | case ISCSI_STATE_TERMINATE: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1648 | reason = FAILURE_SESSION_TERMINATE; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1649 | sc->result = DID_NO_CONNECT << 16; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1650 | break; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1651 | default: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1652 | reason = FAILURE_SESSION_FREED; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1653 | sc->result = DID_NO_CONNECT << 16; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1654 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1655 | goto fault; |
| 1656 | } |
| 1657 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1658 | conn = session->leadconn; |
Mike Christie | 9864404 | 2006-10-16 18:09:39 -0400 | [diff] [blame] | 1659 | if (!conn) { |
| 1660 | reason = FAILURE_SESSION_FREED; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1661 | sc->result = DID_NO_CONNECT << 16; |
Mike Christie | 9864404 | 2006-10-16 18:09:39 -0400 | [diff] [blame] | 1662 | goto fault; |
| 1663 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1664 | |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1665 | if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) { |
| 1666 | reason = FAILURE_SESSION_IN_RECOVERY; |
| 1667 | sc->result = DID_REQUEUE; |
| 1668 | goto fault; |
| 1669 | } |
| 1670 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1671 | if (iscsi_check_cmdsn_window_closed(conn)) { |
| 1672 | reason = FAILURE_WINDOW_CLOSED; |
| 1673 | goto reject; |
| 1674 | } |
| 1675 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1676 | task = iscsi_alloc_task(conn, sc); |
| 1677 | if (!task) { |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 1678 | reason = FAILURE_OOM; |
| 1679 | goto reject; |
| 1680 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1681 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1682 | if (!ihost->workq) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1683 | reason = iscsi_prep_scsi_cmd_pdu(task); |
| 1684 | if (reason) { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1685 | if (reason == -ENOMEM || reason == -EACCES) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1686 | reason = FAILURE_OOM; |
| 1687 | goto prepd_reject; |
| 1688 | } else { |
| 1689 | sc->result = DID_ABORT << 16; |
| 1690 | goto prepd_fault; |
| 1691 | } |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1692 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1693 | if (session->tt->xmit_task(task)) { |
Mike Christie | d3305f3 | 2009-08-20 15:10:58 -0500 | [diff] [blame] | 1694 | session->cmdsn--; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1695 | reason = FAILURE_SESSION_NOT_READY; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1696 | goto prepd_reject; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1697 | } |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1698 | } else { |
| 1699 | list_add_tail(&task->running, &conn->cmdqueue); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1700 | iscsi_conn_queue_work(conn); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1701 | } |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1702 | |
| 1703 | session->queued_cmdsn++; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1704 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1705 | return 0; |
| 1706 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1707 | prepd_reject: |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1708 | iscsi_complete_task(task, ISCSI_TASK_REQUEUE_SCSIQ); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1709 | reject: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1710 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1711 | ISCSI_DBG_SESSION(session, "cmd 0x%x rejected (%d)\n", |
| 1712 | sc->cmnd[0], reason); |
Mike Christie | d6d13ee | 2008-08-17 15:24:43 -0500 | [diff] [blame] | 1713 | return SCSI_MLQUEUE_TARGET_BUSY; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1714 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1715 | prepd_fault: |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1716 | iscsi_complete_task(task, ISCSI_TASK_REQUEUE_SCSIQ); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1717 | fault: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1718 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1719 | ISCSI_DBG_SESSION(session, "iscsi: cmd 0x%x is not queued (%d)\n", |
| 1720 | sc->cmnd[0], reason); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 1721 | if (!scsi_bidi_cmnd(sc)) |
| 1722 | scsi_set_resid(sc, scsi_bufflen(sc)); |
| 1723 | else { |
| 1724 | scsi_out(sc)->resid = scsi_out(sc)->length; |
| 1725 | scsi_in(sc)->resid = scsi_in(sc)->length; |
| 1726 | } |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1727 | sc->scsi_done(sc); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1728 | return 0; |
| 1729 | } |
| 1730 | EXPORT_SYMBOL_GPL(iscsi_queuecommand); |
| 1731 | |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1732 | int iscsi_change_queue_depth(struct scsi_device *sdev, int depth, int reason) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1733 | { |
Mike Christie | 1796e72 | 2009-11-11 16:34:36 -0600 | [diff] [blame] | 1734 | switch (reason) { |
| 1735 | case SCSI_QDEPTH_DEFAULT: |
| 1736 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); |
| 1737 | break; |
| 1738 | case SCSI_QDEPTH_QFULL: |
| 1739 | scsi_track_queue_full(sdev, depth); |
| 1740 | break; |
| 1741 | case SCSI_QDEPTH_RAMP_UP: |
| 1742 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); |
| 1743 | break; |
| 1744 | default: |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1745 | return -EOPNOTSUPP; |
Mike Christie | 1796e72 | 2009-11-11 16:34:36 -0600 | [diff] [blame] | 1746 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1747 | return sdev->queue_depth; |
| 1748 | } |
| 1749 | EXPORT_SYMBOL_GPL(iscsi_change_queue_depth); |
| 1750 | |
Mike Christie | 6b5d6c4 | 2009-04-21 15:32:32 -0500 | [diff] [blame] | 1751 | int iscsi_target_alloc(struct scsi_target *starget) |
| 1752 | { |
| 1753 | struct iscsi_cls_session *cls_session = starget_to_session(starget); |
| 1754 | struct iscsi_session *session = cls_session->dd_data; |
| 1755 | |
| 1756 | starget->can_queue = session->scsi_cmds_max; |
| 1757 | return 0; |
| 1758 | } |
| 1759 | EXPORT_SYMBOL_GPL(iscsi_target_alloc); |
| 1760 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1761 | static void iscsi_tmf_timedout(unsigned long data) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1762 | { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1763 | struct iscsi_conn *conn = (struct iscsi_conn *)data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1764 | struct iscsi_session *session = conn->session; |
| 1765 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1766 | spin_lock(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1767 | if (conn->tmf_state == TMF_QUEUED) { |
| 1768 | conn->tmf_state = TMF_TIMEDOUT; |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1769 | ISCSI_DBG_EH(session, "tmf timedout\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1770 | /* unblock eh_abort() */ |
| 1771 | wake_up(&conn->ehwait); |
| 1772 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1773 | spin_unlock(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1774 | } |
| 1775 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1776 | static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1777 | struct iscsi_tm *hdr, int age, |
| 1778 | int timeout) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1779 | { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1780 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1781 | struct iscsi_task *task; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1782 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1783 | task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr, |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1784 | NULL, 0); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1785 | if (!task) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1786 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 1787 | iscsi_conn_printk(KERN_ERR, conn, "Could not send TMF.\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1788 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1789 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1790 | return -EPERM; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1791 | } |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1792 | conn->tmfcmd_pdus_cnt++; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1793 | conn->tmf_timer.expires = timeout * HZ + jiffies; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1794 | conn->tmf_timer.function = iscsi_tmf_timedout; |
| 1795 | conn->tmf_timer.data = (unsigned long)conn; |
| 1796 | add_timer(&conn->tmf_timer); |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1797 | ISCSI_DBG_EH(session, "tmf set timeout\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1798 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1799 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1800 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1801 | |
| 1802 | /* |
| 1803 | * block eh thread until: |
| 1804 | * |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1805 | * 1) tmf response |
| 1806 | * 2) tmf timeout |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1807 | * 3) session is terminated or restarted or userspace has |
| 1808 | * given up on recovery |
| 1809 | */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1810 | wait_event_interruptible(conn->ehwait, age != session->age || |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1811 | session->state != ISCSI_STATE_LOGGED_IN || |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1812 | conn->tmf_state != TMF_QUEUED); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1813 | if (signal_pending(current)) |
| 1814 | flush_signals(current); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1815 | del_timer_sync(&conn->tmf_timer); |
| 1816 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1817 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1818 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1819 | /* if the session drops it will clean up the task */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1820 | if (age != session->age || |
| 1821 | session->state != ISCSI_STATE_LOGGED_IN) |
| 1822 | return -ENOTCONN; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1823 | return 0; |
| 1824 | } |
| 1825 | |
| 1826 | /* |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1827 | * Fail commands. session lock held and recv side suspended and xmit |
| 1828 | * thread flushed |
| 1829 | */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1830 | static void fail_scsi_tasks(struct iscsi_conn *conn, unsigned lun, |
| 1831 | int error) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1832 | { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1833 | struct iscsi_task *task; |
| 1834 | int i; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1835 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1836 | for (i = 0; i < conn->session->cmds_max; i++) { |
| 1837 | task = conn->session->cmds[i]; |
| 1838 | if (!task->sc || task->state == ISCSI_TASK_FREE) |
| 1839 | continue; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1840 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1841 | if (lun != -1 && lun != task->sc->device->lun) |
| 1842 | continue; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1843 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1844 | ISCSI_DBG_SESSION(conn->session, |
| 1845 | "failing sc %p itt 0x%x state %d\n", |
| 1846 | task->sc, task->itt, task->state); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1847 | fail_scsi_task(task, error); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1848 | } |
| 1849 | } |
| 1850 | |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1851 | /** |
| 1852 | * iscsi_suspend_queue - suspend iscsi_queuecommand |
| 1853 | * @conn: iscsi conn to stop queueing IO on |
| 1854 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1855 | * This grabs the session frwd_lock to make sure no one is in |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1856 | * xmit_task/queuecommand, and then sets suspend to prevent |
| 1857 | * new commands from being queued. This only needs to be called |
| 1858 | * by offload drivers that need to sync a path like ep disconnect |
| 1859 | * with the iscsi_queuecommand/xmit_task. To start IO again libiscsi |
| 1860 | * will call iscsi_start_tx and iscsi_unblock_session when in FFP. |
| 1861 | */ |
| 1862 | void iscsi_suspend_queue(struct iscsi_conn *conn) |
| 1863 | { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1864 | spin_lock_bh(&conn->session->frwd_lock); |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1865 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1866 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1867 | } |
| 1868 | EXPORT_SYMBOL_GPL(iscsi_suspend_queue); |
| 1869 | |
| 1870 | /** |
| 1871 | * iscsi_suspend_tx - suspend iscsi_data_xmit |
| 1872 | * @conn: iscsi conn tp stop processing IO on. |
| 1873 | * |
| 1874 | * This function sets the suspend bit to prevent iscsi_data_xmit |
| 1875 | * from sending new IO, and if work is queued on the xmit thread |
| 1876 | * it will wait for it to be completed. |
| 1877 | */ |
Mike Christie | b40977d | 2008-05-21 15:54:03 -0500 | [diff] [blame] | 1878 | void iscsi_suspend_tx(struct iscsi_conn *conn) |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1879 | { |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1880 | struct Scsi_Host *shost = conn->session->host; |
| 1881 | struct iscsi_host *ihost = shost_priv(shost); |
| 1882 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1883 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1884 | if (ihost->workq) |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1885 | flush_workqueue(ihost->workq); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1886 | } |
Mike Christie | b40977d | 2008-05-21 15:54:03 -0500 | [diff] [blame] | 1887 | EXPORT_SYMBOL_GPL(iscsi_suspend_tx); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1888 | |
| 1889 | static void iscsi_start_tx(struct iscsi_conn *conn) |
| 1890 | { |
| 1891 | clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1892 | iscsi_conn_queue_work(conn); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1893 | } |
| 1894 | |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 1895 | /* |
| 1896 | * We want to make sure a ping is in flight. It has timed out. |
| 1897 | * And we are not busy processing a pdu that is making |
| 1898 | * progress but got started before the ping and is taking a while |
| 1899 | * to complete so the ping is just stuck behind it in a queue. |
| 1900 | */ |
| 1901 | static int iscsi_has_ping_timed_out(struct iscsi_conn *conn) |
| 1902 | { |
| 1903 | if (conn->ping_task && |
| 1904 | time_before_eq(conn->last_recv + (conn->recv_timeout * HZ) + |
| 1905 | (conn->ping_timeout * HZ), jiffies)) |
| 1906 | return 1; |
| 1907 | else |
| 1908 | return 0; |
| 1909 | } |
| 1910 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1911 | static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1912 | { |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1913 | enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED; |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1914 | struct iscsi_task *task = NULL, *running_task; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1915 | struct iscsi_cls_session *cls_session; |
| 1916 | struct iscsi_session *session; |
| 1917 | struct iscsi_conn *conn; |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1918 | int i; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1919 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1920 | cls_session = starget_to_session(scsi_target(sc->device)); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1921 | session = cls_session->dd_data; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1922 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1923 | ISCSI_DBG_EH(session, "scsi cmd %p timedout\n", sc); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1924 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1925 | spin_lock(&session->frwd_lock); |
Mike Christie | e3d338a | 2012-01-26 21:13:11 -0600 | [diff] [blame] | 1926 | task = (struct iscsi_task *)sc->SCp.ptr; |
| 1927 | if (!task) { |
| 1928 | /* |
| 1929 | * Raced with completion. Blk layer has taken ownership |
| 1930 | * so let timeout code complete it now. |
| 1931 | */ |
| 1932 | rc = BLK_EH_HANDLED; |
| 1933 | goto done; |
| 1934 | } |
| 1935 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1936 | if (session->state != ISCSI_STATE_LOGGED_IN) { |
| 1937 | /* |
| 1938 | * We are probably in the middle of iscsi recovery so let |
| 1939 | * that complete and handle the error. |
| 1940 | */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 1941 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1942 | goto done; |
| 1943 | } |
| 1944 | |
| 1945 | conn = session->leadconn; |
| 1946 | if (!conn) { |
| 1947 | /* In the middle of shuting down */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 1948 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1949 | goto done; |
| 1950 | } |
| 1951 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1952 | /* |
| 1953 | * If we have sent (at least queued to the network layer) a pdu or |
| 1954 | * recvd one for the task since the last timeout ask for |
| 1955 | * more time. If on the next timeout we have not made progress |
| 1956 | * we can check if it is the task or connection when we send the |
| 1957 | * nop as a ping. |
| 1958 | */ |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1959 | if (time_after(task->last_xfer, task->last_timeout)) { |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1960 | ISCSI_DBG_EH(session, "Command making progress. Asking " |
| 1961 | "scsi-ml for more time to complete. " |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1962 | "Last data xfer at %lu. Last timeout was at " |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1963 | "%lu\n.", task->last_xfer, task->last_timeout); |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1964 | task->have_checked_conn = false; |
| 1965 | rc = BLK_EH_RESET_TIMER; |
| 1966 | goto done; |
| 1967 | } |
| 1968 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1969 | if (!conn->recv_timeout && !conn->ping_timeout) |
| 1970 | goto done; |
| 1971 | /* |
| 1972 | * if the ping timedout then we are in the middle of cleaning up |
| 1973 | * and can let the iscsi eh handle it |
| 1974 | */ |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 1975 | if (iscsi_has_ping_timed_out(conn)) { |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 1976 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 1977 | goto done; |
| 1978 | } |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1979 | |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1980 | for (i = 0; i < conn->session->cmds_max; i++) { |
| 1981 | running_task = conn->session->cmds[i]; |
| 1982 | if (!running_task->sc || running_task == task || |
| 1983 | running_task->state != ISCSI_TASK_RUNNING) |
| 1984 | continue; |
| 1985 | |
| 1986 | /* |
| 1987 | * Only check if cmds started before this one have made |
| 1988 | * progress, or this could never fail |
| 1989 | */ |
| 1990 | if (time_after(running_task->sc->jiffies_at_alloc, |
| 1991 | task->sc->jiffies_at_alloc)) |
| 1992 | continue; |
| 1993 | |
| 1994 | if (time_after(running_task->last_xfer, task->last_timeout)) { |
| 1995 | /* |
| 1996 | * This task has not made progress, but a task |
| 1997 | * started before us has transferred data since |
| 1998 | * we started/last-checked. We could be queueing |
| 1999 | * too many tasks or the LU is bad. |
| 2000 | * |
| 2001 | * If the device is bad the cmds ahead of us on |
| 2002 | * other devs will complete, and this loop will |
| 2003 | * eventually fail starting the scsi eh. |
| 2004 | */ |
| 2005 | ISCSI_DBG_EH(session, "Command has not made progress " |
| 2006 | "but commands ahead of it have. " |
| 2007 | "Asking scsi-ml for more time to " |
| 2008 | "complete. Our last xfer vs running task " |
| 2009 | "last xfer %lu/%lu. Last check %lu.\n", |
| 2010 | task->last_xfer, running_task->last_xfer, |
| 2011 | task->last_timeout); |
| 2012 | rc = BLK_EH_RESET_TIMER; |
| 2013 | goto done; |
| 2014 | } |
| 2015 | } |
| 2016 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2017 | /* Assumes nop timeout is shorter than scsi cmd timeout */ |
| 2018 | if (task->have_checked_conn) |
| 2019 | goto done; |
| 2020 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2021 | /* |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2022 | * Checking the transport already or nop from a cmd timeout still |
| 2023 | * running |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2024 | */ |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2025 | if (conn->ping_task) { |
| 2026 | task->have_checked_conn = true; |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 2027 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2028 | goto done; |
| 2029 | } |
| 2030 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2031 | /* Make sure there is a transport check done */ |
| 2032 | iscsi_send_nopout(conn, NULL); |
| 2033 | task->have_checked_conn = true; |
| 2034 | rc = BLK_EH_RESET_TIMER; |
| 2035 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2036 | done: |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2037 | if (task) |
| 2038 | task->last_timeout = jiffies; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2039 | spin_unlock(&session->frwd_lock); |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2040 | ISCSI_DBG_EH(session, "return %s\n", rc == BLK_EH_RESET_TIMER ? |
| 2041 | "timer reset" : "nh"); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2042 | return rc; |
| 2043 | } |
| 2044 | |
| 2045 | static void iscsi_check_transport_timeouts(unsigned long data) |
| 2046 | { |
| 2047 | struct iscsi_conn *conn = (struct iscsi_conn *)data; |
| 2048 | struct iscsi_session *session = conn->session; |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2049 | unsigned long recv_timeout, next_timeout = 0, last_recv; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2050 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2051 | spin_lock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2052 | if (session->state != ISCSI_STATE_LOGGED_IN) |
| 2053 | goto done; |
| 2054 | |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2055 | recv_timeout = conn->recv_timeout; |
| 2056 | if (!recv_timeout) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2057 | goto done; |
| 2058 | |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2059 | recv_timeout *= HZ; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2060 | last_recv = conn->last_recv; |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2061 | |
| 2062 | if (iscsi_has_ping_timed_out(conn)) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2063 | iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs " |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2064 | "expired, recv timeout %d, last rx %lu, " |
| 2065 | "last ping %lu, now %lu\n", |
| 2066 | conn->ping_timeout, conn->recv_timeout, |
| 2067 | last_recv, conn->last_ping, jiffies); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2068 | spin_unlock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2069 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
| 2070 | return; |
| 2071 | } |
| 2072 | |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2073 | if (time_before_eq(last_recv + recv_timeout, jiffies)) { |
Mike Christie | c8611f9 | 2008-05-08 20:15:34 -0500 | [diff] [blame] | 2074 | /* send a ping to try to provoke some traffic */ |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 2075 | ISCSI_DBG_CONN(conn, "Sending nopout as ping\n"); |
Mike Christie | c8611f9 | 2008-05-08 20:15:34 -0500 | [diff] [blame] | 2076 | iscsi_send_nopout(conn, NULL); |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2077 | next_timeout = conn->last_ping + (conn->ping_timeout * HZ); |
Mike Christie | ad294e9 | 2008-01-31 13:36:50 -0600 | [diff] [blame] | 2078 | } else |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2079 | next_timeout = last_recv + recv_timeout; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2080 | |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 2081 | ISCSI_DBG_CONN(conn, "Setting next tmo %lu\n", next_timeout); |
Mike Christie | ad294e9 | 2008-01-31 13:36:50 -0600 | [diff] [blame] | 2082 | mod_timer(&conn->transport_timer, next_timeout); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2083 | done: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2084 | spin_unlock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2085 | } |
| 2086 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2087 | static void iscsi_prep_abort_task_pdu(struct iscsi_task *task, |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2088 | struct iscsi_tm *hdr) |
| 2089 | { |
| 2090 | memset(hdr, 0, sizeof(*hdr)); |
| 2091 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; |
| 2092 | hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK; |
| 2093 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 2094 | hdr->lun = task->lun; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 2095 | hdr->rtt = task->hdr_itt; |
| 2096 | hdr->refcmdsn = task->cmdsn; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2097 | } |
| 2098 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2099 | int iscsi_eh_abort(struct scsi_cmnd *sc) |
| 2100 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2101 | struct iscsi_cls_session *cls_session; |
| 2102 | struct iscsi_session *session; |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 2103 | struct iscsi_conn *conn; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2104 | struct iscsi_task *task; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2105 | struct iscsi_tm *hdr; |
| 2106 | int rc, age; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2107 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2108 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2109 | session = cls_session->dd_data; |
| 2110 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2111 | ISCSI_DBG_EH(session, "aborting sc %p\n", sc); |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 2112 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2113 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2114 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 2115 | /* |
| 2116 | * if session was ISCSI_STATE_IN_RECOVERY then we may not have |
| 2117 | * got the command. |
| 2118 | */ |
| 2119 | if (!sc->SCp.ptr) { |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2120 | ISCSI_DBG_EH(session, "sc never reached iscsi layer or " |
| 2121 | "it completed.\n"); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2122 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2123 | mutex_unlock(&session->eh_mutex); |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 2124 | return SUCCESS; |
| 2125 | } |
| 2126 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2127 | /* |
| 2128 | * If we are not logged in or we have started a new session |
| 2129 | * then let the host reset code handle this |
| 2130 | */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2131 | if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN || |
| 2132 | sc->SCp.phase != session->age) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2133 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2134 | mutex_unlock(&session->eh_mutex); |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2135 | ISCSI_DBG_EH(session, "failing abort due to dropped " |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 2136 | "session.\n"); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2137 | return FAILED; |
| 2138 | } |
| 2139 | |
| 2140 | conn = session->leadconn; |
| 2141 | conn->eh_abort_cnt++; |
| 2142 | age = session->age; |
| 2143 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2144 | task = (struct iscsi_task *)sc->SCp.ptr; |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2145 | ISCSI_DBG_EH(session, "aborting [sc %p itt 0x%x]\n", |
| 2146 | sc, task->itt); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2147 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2148 | /* task completed before time out */ |
| 2149 | if (!task->sc) { |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2150 | ISCSI_DBG_EH(session, "sc completed while abort in progress\n"); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2151 | goto success; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 2152 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2153 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2154 | if (task->state == ISCSI_TASK_PENDING) { |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 2155 | fail_scsi_task(task, DID_ABORT); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2156 | goto success; |
| 2157 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2158 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2159 | /* only have one tmf outstanding at a time */ |
| 2160 | if (conn->tmf_state != TMF_INITIAL) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2161 | goto failed; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2162 | conn->tmf_state = TMF_QUEUED; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2163 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2164 | hdr = &conn->tmhdr; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2165 | iscsi_prep_abort_task_pdu(task, hdr); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2166 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2167 | if (iscsi_exec_task_mgmt_fn(conn, hdr, age, session->abort_timeout)) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2168 | rc = FAILED; |
| 2169 | goto failed; |
| 2170 | } |
| 2171 | |
| 2172 | switch (conn->tmf_state) { |
| 2173 | case TMF_SUCCESS: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2174 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 2175 | /* |
| 2176 | * stop tx side incase the target had sent a abort rsp but |
| 2177 | * the initiator was still writing out data. |
| 2178 | */ |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2179 | iscsi_suspend_tx(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2180 | /* |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 2181 | * we do not stop the recv side because targets have been |
| 2182 | * good and have never sent us a successful tmf response |
| 2183 | * then sent more data for the cmd. |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2184 | */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2185 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 2186 | fail_scsi_task(task, DID_ABORT); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2187 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 2188 | memset(hdr, 0, sizeof(*hdr)); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2189 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2190 | iscsi_start_tx(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2191 | goto success_unlocked; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2192 | case TMF_TIMEDOUT: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2193 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2194 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2195 | goto failed_unlocked; |
| 2196 | case TMF_NOT_FOUND: |
| 2197 | if (!sc->SCp.ptr) { |
| 2198 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 2199 | memset(hdr, 0, sizeof(*hdr)); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2200 | /* task completed before tmf abort response */ |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2201 | ISCSI_DBG_EH(session, "sc completed while abort in " |
| 2202 | "progress\n"); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2203 | goto success; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 2204 | } |
| 2205 | /* fall through */ |
| 2206 | default: |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2207 | conn->tmf_state = TMF_INITIAL; |
| 2208 | goto failed; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2209 | } |
| 2210 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2211 | success: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2212 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2213 | success_unlocked: |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2214 | ISCSI_DBG_EH(session, "abort success [sc %p itt 0x%x]\n", |
| 2215 | sc, task->itt); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2216 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2217 | return SUCCESS; |
| 2218 | |
| 2219 | failed: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2220 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2221 | failed_unlocked: |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2222 | ISCSI_DBG_EH(session, "abort failed [sc %p itt 0x%x]\n", sc, |
| 2223 | task ? task->itt : 0); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2224 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2225 | return FAILED; |
| 2226 | } |
| 2227 | EXPORT_SYMBOL_GPL(iscsi_eh_abort); |
| 2228 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2229 | static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) |
| 2230 | { |
| 2231 | memset(hdr, 0, sizeof(*hdr)); |
| 2232 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; |
| 2233 | hdr->flags = ISCSI_TM_FUNC_LOGICAL_UNIT_RESET & ISCSI_FLAG_TM_FUNC_MASK; |
| 2234 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 2235 | int_to_scsilun(sc->device->lun, &hdr->lun); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2236 | hdr->rtt = RESERVED_ITT; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2237 | } |
| 2238 | |
| 2239 | int iscsi_eh_device_reset(struct scsi_cmnd *sc) |
| 2240 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2241 | struct iscsi_cls_session *cls_session; |
| 2242 | struct iscsi_session *session; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2243 | struct iscsi_conn *conn; |
| 2244 | struct iscsi_tm *hdr; |
| 2245 | int rc = FAILED; |
| 2246 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2247 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2248 | session = cls_session->dd_data; |
| 2249 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2250 | ISCSI_DBG_EH(session, "LU Reset [sc %p lun %u]\n", sc, sc->device->lun); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2251 | |
| 2252 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2253 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2254 | /* |
| 2255 | * Just check if we are not logged in. We cannot check for |
| 2256 | * the phase because the reset could come from a ioctl. |
| 2257 | */ |
| 2258 | if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN) |
| 2259 | goto unlock; |
| 2260 | conn = session->leadconn; |
| 2261 | |
| 2262 | /* only have one tmf outstanding at a time */ |
| 2263 | if (conn->tmf_state != TMF_INITIAL) |
| 2264 | goto unlock; |
| 2265 | conn->tmf_state = TMF_QUEUED; |
| 2266 | |
| 2267 | hdr = &conn->tmhdr; |
| 2268 | iscsi_prep_lun_reset_pdu(sc, hdr); |
| 2269 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2270 | if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age, |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2271 | session->lu_reset_timeout)) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2272 | rc = FAILED; |
| 2273 | goto unlock; |
| 2274 | } |
| 2275 | |
| 2276 | switch (conn->tmf_state) { |
| 2277 | case TMF_SUCCESS: |
| 2278 | break; |
| 2279 | case TMF_TIMEDOUT: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2280 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2281 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2282 | goto done; |
| 2283 | default: |
| 2284 | conn->tmf_state = TMF_INITIAL; |
| 2285 | goto unlock; |
| 2286 | } |
| 2287 | |
| 2288 | rc = SUCCESS; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2289 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2290 | |
| 2291 | iscsi_suspend_tx(conn); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 2292 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2293 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 2294 | memset(hdr, 0, sizeof(*hdr)); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 2295 | fail_scsi_tasks(conn, sc->device->lun, DID_ERROR); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2296 | conn->tmf_state = TMF_INITIAL; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2297 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2298 | |
| 2299 | iscsi_start_tx(conn); |
| 2300 | goto done; |
| 2301 | |
| 2302 | unlock: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2303 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2304 | done: |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2305 | ISCSI_DBG_EH(session, "dev reset result = %s\n", |
| 2306 | rc == SUCCESS ? "SUCCESS" : "FAILED"); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2307 | mutex_unlock(&session->eh_mutex); |
| 2308 | return rc; |
| 2309 | } |
| 2310 | EXPORT_SYMBOL_GPL(iscsi_eh_device_reset); |
| 2311 | |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2312 | void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session) |
| 2313 | { |
| 2314 | struct iscsi_session *session = cls_session->dd_data; |
| 2315 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2316 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2317 | if (session->state != ISCSI_STATE_LOGGED_IN) { |
| 2318 | session->state = ISCSI_STATE_RECOVERY_FAILED; |
| 2319 | if (session->leadconn) |
| 2320 | wake_up(&session->leadconn->ehwait); |
| 2321 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2322 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2323 | } |
| 2324 | EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout); |
| 2325 | |
| 2326 | /** |
| 2327 | * iscsi_eh_session_reset - drop session and attempt relogin |
| 2328 | * @sc: scsi command |
| 2329 | * |
| 2330 | * This function will wait for a relogin, session termination from |
| 2331 | * userspace, or a recovery/replacement timeout. |
| 2332 | */ |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2333 | int iscsi_eh_session_reset(struct scsi_cmnd *sc) |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2334 | { |
| 2335 | struct iscsi_cls_session *cls_session; |
| 2336 | struct iscsi_session *session; |
| 2337 | struct iscsi_conn *conn; |
| 2338 | |
| 2339 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2340 | session = cls_session->dd_data; |
| 2341 | conn = session->leadconn; |
| 2342 | |
| 2343 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2344 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2345 | if (session->state == ISCSI_STATE_TERMINATE) { |
| 2346 | failed: |
| 2347 | ISCSI_DBG_EH(session, |
| 2348 | "failing session reset: Could not log back into " |
| 2349 | "%s, %s [age %d]\n", session->targetname, |
| 2350 | conn->persistent_address, session->age); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2351 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2352 | mutex_unlock(&session->eh_mutex); |
| 2353 | return FAILED; |
| 2354 | } |
| 2355 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2356 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2357 | mutex_unlock(&session->eh_mutex); |
| 2358 | /* |
| 2359 | * we drop the lock here but the leadconn cannot be destoyed while |
| 2360 | * we are in the scsi eh |
| 2361 | */ |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2362 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2363 | |
| 2364 | ISCSI_DBG_EH(session, "wait for relogin\n"); |
| 2365 | wait_event_interruptible(conn->ehwait, |
| 2366 | session->state == ISCSI_STATE_TERMINATE || |
| 2367 | session->state == ISCSI_STATE_LOGGED_IN || |
| 2368 | session->state == ISCSI_STATE_RECOVERY_FAILED); |
| 2369 | if (signal_pending(current)) |
| 2370 | flush_signals(current); |
| 2371 | |
| 2372 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2373 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2374 | if (session->state == ISCSI_STATE_LOGGED_IN) { |
| 2375 | ISCSI_DBG_EH(session, |
| 2376 | "session reset succeeded for %s,%s\n", |
| 2377 | session->targetname, conn->persistent_address); |
| 2378 | } else |
| 2379 | goto failed; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2380 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2381 | mutex_unlock(&session->eh_mutex); |
| 2382 | return SUCCESS; |
| 2383 | } |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2384 | EXPORT_SYMBOL_GPL(iscsi_eh_session_reset); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2385 | |
| 2386 | static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) |
| 2387 | { |
| 2388 | memset(hdr, 0, sizeof(*hdr)); |
| 2389 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; |
| 2390 | hdr->flags = ISCSI_TM_FUNC_TARGET_WARM_RESET & ISCSI_FLAG_TM_FUNC_MASK; |
| 2391 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
| 2392 | hdr->rtt = RESERVED_ITT; |
| 2393 | } |
| 2394 | |
| 2395 | /** |
| 2396 | * iscsi_eh_target_reset - reset target |
| 2397 | * @sc: scsi command |
| 2398 | * |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2399 | * This will attempt to send a warm target reset. |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2400 | */ |
| 2401 | int iscsi_eh_target_reset(struct scsi_cmnd *sc) |
| 2402 | { |
| 2403 | struct iscsi_cls_session *cls_session; |
| 2404 | struct iscsi_session *session; |
| 2405 | struct iscsi_conn *conn; |
| 2406 | struct iscsi_tm *hdr; |
| 2407 | int rc = FAILED; |
| 2408 | |
| 2409 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2410 | session = cls_session->dd_data; |
| 2411 | |
| 2412 | ISCSI_DBG_EH(session, "tgt Reset [sc %p tgt %s]\n", sc, |
| 2413 | session->targetname); |
| 2414 | |
| 2415 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2416 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2417 | /* |
| 2418 | * Just check if we are not logged in. We cannot check for |
| 2419 | * the phase because the reset could come from a ioctl. |
| 2420 | */ |
| 2421 | if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN) |
| 2422 | goto unlock; |
| 2423 | conn = session->leadconn; |
| 2424 | |
| 2425 | /* only have one tmf outstanding at a time */ |
| 2426 | if (conn->tmf_state != TMF_INITIAL) |
| 2427 | goto unlock; |
| 2428 | conn->tmf_state = TMF_QUEUED; |
| 2429 | |
| 2430 | hdr = &conn->tmhdr; |
| 2431 | iscsi_prep_tgt_reset_pdu(sc, hdr); |
| 2432 | |
| 2433 | if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age, |
| 2434 | session->tgt_reset_timeout)) { |
| 2435 | rc = FAILED; |
| 2436 | goto unlock; |
| 2437 | } |
| 2438 | |
| 2439 | switch (conn->tmf_state) { |
| 2440 | case TMF_SUCCESS: |
| 2441 | break; |
| 2442 | case TMF_TIMEDOUT: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2443 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2444 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2445 | goto done; |
| 2446 | default: |
| 2447 | conn->tmf_state = TMF_INITIAL; |
| 2448 | goto unlock; |
| 2449 | } |
| 2450 | |
| 2451 | rc = SUCCESS; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2452 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2453 | |
| 2454 | iscsi_suspend_tx(conn); |
| 2455 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2456 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2457 | memset(hdr, 0, sizeof(*hdr)); |
| 2458 | fail_scsi_tasks(conn, -1, DID_ERROR); |
| 2459 | conn->tmf_state = TMF_INITIAL; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2460 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2461 | |
| 2462 | iscsi_start_tx(conn); |
| 2463 | goto done; |
| 2464 | |
| 2465 | unlock: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2466 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2467 | done: |
| 2468 | ISCSI_DBG_EH(session, "tgt %s reset result = %s\n", session->targetname, |
| 2469 | rc == SUCCESS ? "SUCCESS" : "FAILED"); |
| 2470 | mutex_unlock(&session->eh_mutex); |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2471 | return rc; |
| 2472 | } |
| 2473 | EXPORT_SYMBOL_GPL(iscsi_eh_target_reset); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2474 | |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2475 | /** |
| 2476 | * iscsi_eh_recover_target - reset target and possibly the session |
| 2477 | * @sc: scsi command |
| 2478 | * |
| 2479 | * This will attempt to send a warm target reset. If that fails, |
| 2480 | * we will escalate to ERL0 session recovery. |
| 2481 | */ |
| 2482 | int iscsi_eh_recover_target(struct scsi_cmnd *sc) |
| 2483 | { |
| 2484 | int rc; |
| 2485 | |
| 2486 | rc = iscsi_eh_target_reset(sc); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2487 | if (rc == FAILED) |
| 2488 | rc = iscsi_eh_session_reset(sc); |
| 2489 | return rc; |
| 2490 | } |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2491 | EXPORT_SYMBOL_GPL(iscsi_eh_recover_target); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2492 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2493 | /* |
| 2494 | * Pre-allocate a pool of @max items of @item_size. By default, the pool |
| 2495 | * should be accessed via kfifo_{get,put} on q->queue. |
| 2496 | * Optionally, the caller can obtain the array of object pointers |
| 2497 | * by passing in a non-NULL @items pointer |
| 2498 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2499 | int |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2500 | iscsi_pool_init(struct iscsi_pool *q, int max, void ***items, int item_size) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2501 | { |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2502 | int i, num_arrays = 1; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2503 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2504 | memset(q, 0, sizeof(*q)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2505 | |
| 2506 | q->max = max; |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2507 | |
| 2508 | /* If the user passed an items pointer, he wants a copy of |
| 2509 | * the array. */ |
| 2510 | if (items) |
| 2511 | num_arrays++; |
| 2512 | q->pool = kzalloc(num_arrays * max * sizeof(void*), GFP_KERNEL); |
| 2513 | if (q->pool == NULL) |
Jean Delvare | f474a37 | 2009-03-05 14:45:55 -0600 | [diff] [blame] | 2514 | return -ENOMEM; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2515 | |
Stefani Seibold | c1e13f2 | 2009-12-21 14:37:27 -0800 | [diff] [blame] | 2516 | kfifo_init(&q->queue, (void*)q->pool, max * sizeof(void*)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2517 | |
| 2518 | for (i = 0; i < max; i++) { |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2519 | q->pool[i] = kzalloc(item_size, GFP_KERNEL); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2520 | if (q->pool[i] == NULL) { |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2521 | q->max = i; |
| 2522 | goto enomem; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2523 | } |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2524 | kfifo_in(&q->queue, (void*)&q->pool[i], sizeof(void*)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2525 | } |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2526 | |
| 2527 | if (items) { |
| 2528 | *items = q->pool + max; |
| 2529 | memcpy(*items, q->pool, max * sizeof(void *)); |
| 2530 | } |
| 2531 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2532 | return 0; |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2533 | |
| 2534 | enomem: |
| 2535 | iscsi_pool_free(q); |
| 2536 | return -ENOMEM; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2537 | } |
| 2538 | EXPORT_SYMBOL_GPL(iscsi_pool_init); |
| 2539 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2540 | void iscsi_pool_free(struct iscsi_pool *q) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2541 | { |
| 2542 | int i; |
| 2543 | |
| 2544 | for (i = 0; i < q->max; i++) |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2545 | kfree(q->pool[i]); |
Jean Delvare | f474a37 | 2009-03-05 14:45:55 -0600 | [diff] [blame] | 2546 | kfree(q->pool); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2547 | } |
| 2548 | EXPORT_SYMBOL_GPL(iscsi_pool_free); |
| 2549 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2550 | /** |
| 2551 | * iscsi_host_add - add host to system |
| 2552 | * @shost: scsi host |
| 2553 | * @pdev: parent device |
| 2554 | * |
| 2555 | * This should be called by partial offload and software iscsi drivers |
| 2556 | * to add a host to the system. |
| 2557 | */ |
| 2558 | int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2559 | { |
Mike Christie | 8e9a20c | 2008-06-16 10:11:33 -0500 | [diff] [blame] | 2560 | if (!shost->can_queue) |
| 2561 | shost->can_queue = ISCSI_DEF_XMIT_CMDS_MAX; |
| 2562 | |
Mike Christie | 4d10835 | 2009-03-05 14:46:04 -0600 | [diff] [blame] | 2563 | if (!shost->cmd_per_lun) |
| 2564 | shost->cmd_per_lun = ISCSI_DEF_CMD_PER_LUN; |
| 2565 | |
Mike Christie | 308cec1 | 2009-02-06 12:06:20 -0600 | [diff] [blame] | 2566 | if (!shost->transportt->eh_timed_out) |
| 2567 | shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2568 | return scsi_add_host(shost, pdev); |
| 2569 | } |
| 2570 | EXPORT_SYMBOL_GPL(iscsi_host_add); |
| 2571 | |
| 2572 | /** |
| 2573 | * iscsi_host_alloc - allocate a host and driver data |
| 2574 | * @sht: scsi host template |
| 2575 | * @dd_data_size: driver host data size |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2576 | * @xmit_can_sleep: bool indicating if LLD will queue IO from a work queue |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2577 | * |
| 2578 | * This should be called by partial offload and software iscsi drivers. |
| 2579 | * To access the driver specific memory use the iscsi_host_priv() macro. |
| 2580 | */ |
| 2581 | struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, |
Mike Christie | 4d10835 | 2009-03-05 14:46:04 -0600 | [diff] [blame] | 2582 | int dd_data_size, bool xmit_can_sleep) |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2583 | { |
| 2584 | struct Scsi_Host *shost; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2585 | struct iscsi_host *ihost; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2586 | |
| 2587 | shost = scsi_host_alloc(sht, sizeof(struct iscsi_host) + dd_data_size); |
| 2588 | if (!shost) |
| 2589 | return NULL; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2590 | ihost = shost_priv(shost); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2591 | |
| 2592 | if (xmit_can_sleep) { |
| 2593 | snprintf(ihost->workq_name, sizeof(ihost->workq_name), |
| 2594 | "iscsi_q_%d", shost->host_no); |
| 2595 | ihost->workq = create_singlethread_workqueue(ihost->workq_name); |
| 2596 | if (!ihost->workq) |
| 2597 | goto free_host; |
| 2598 | } |
| 2599 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2600 | spin_lock_init(&ihost->lock); |
| 2601 | ihost->state = ISCSI_HOST_SETUP; |
| 2602 | ihost->num_sessions = 0; |
| 2603 | init_waitqueue_head(&ihost->session_removal_wq); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2604 | return shost; |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2605 | |
| 2606 | free_host: |
| 2607 | scsi_host_put(shost); |
| 2608 | return NULL; |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2609 | } |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2610 | EXPORT_SYMBOL_GPL(iscsi_host_alloc); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2611 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2612 | static void iscsi_notify_host_removed(struct iscsi_cls_session *cls_session) |
| 2613 | { |
Mike Christie | 40a06e7 | 2009-03-05 14:46:05 -0600 | [diff] [blame] | 2614 | iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_INVALID_HOST); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2615 | } |
| 2616 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2617 | /** |
| 2618 | * iscsi_host_remove - remove host and sessions |
| 2619 | * @shost: scsi host |
| 2620 | * |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2621 | * If there are any sessions left, this will initiate the removal and wait |
| 2622 | * for the completion. |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2623 | */ |
| 2624 | void iscsi_host_remove(struct Scsi_Host *shost) |
| 2625 | { |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2626 | struct iscsi_host *ihost = shost_priv(shost); |
| 2627 | unsigned long flags; |
| 2628 | |
| 2629 | spin_lock_irqsave(&ihost->lock, flags); |
| 2630 | ihost->state = ISCSI_HOST_REMOVED; |
| 2631 | spin_unlock_irqrestore(&ihost->lock, flags); |
| 2632 | |
| 2633 | iscsi_host_for_each_session(shost, iscsi_notify_host_removed); |
| 2634 | wait_event_interruptible(ihost->session_removal_wq, |
| 2635 | ihost->num_sessions == 0); |
| 2636 | if (signal_pending(current)) |
| 2637 | flush_signals(current); |
| 2638 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2639 | scsi_remove_host(shost); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2640 | if (ihost->workq) |
| 2641 | destroy_workqueue(ihost->workq); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2642 | } |
| 2643 | EXPORT_SYMBOL_GPL(iscsi_host_remove); |
| 2644 | |
| 2645 | void iscsi_host_free(struct Scsi_Host *shost) |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2646 | { |
| 2647 | struct iscsi_host *ihost = shost_priv(shost); |
| 2648 | |
| 2649 | kfree(ihost->netdev); |
| 2650 | kfree(ihost->hwaddress); |
| 2651 | kfree(ihost->initiatorname); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2652 | scsi_host_put(shost); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2653 | } |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2654 | EXPORT_SYMBOL_GPL(iscsi_host_free); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2655 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2656 | static void iscsi_host_dec_session_cnt(struct Scsi_Host *shost) |
| 2657 | { |
| 2658 | struct iscsi_host *ihost = shost_priv(shost); |
| 2659 | unsigned long flags; |
| 2660 | |
| 2661 | shost = scsi_host_get(shost); |
| 2662 | if (!shost) { |
| 2663 | printk(KERN_ERR "Invalid state. Cannot notify host removal " |
| 2664 | "of session teardown event because host already " |
| 2665 | "removed.\n"); |
| 2666 | return; |
| 2667 | } |
| 2668 | |
| 2669 | spin_lock_irqsave(&ihost->lock, flags); |
| 2670 | ihost->num_sessions--; |
| 2671 | if (ihost->num_sessions == 0) |
| 2672 | wake_up(&ihost->session_removal_wq); |
| 2673 | spin_unlock_irqrestore(&ihost->lock, flags); |
| 2674 | scsi_host_put(shost); |
| 2675 | } |
| 2676 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2677 | /** |
| 2678 | * iscsi_session_setup - create iscsi cls session and host and session |
| 2679 | * @iscsit: iscsi transport template |
| 2680 | * @shost: scsi host |
| 2681 | * @cmds_max: session can queue |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2682 | * @cmd_task_size: LLD task private data size |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2683 | * @initial_cmdsn: initial CmdSN |
| 2684 | * |
| 2685 | * This can be used by software iscsi_transports that allocate |
| 2686 | * a session per scsi host. |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2687 | * |
| 2688 | * Callers should set cmds_max to the largest total numer (mgmt + scsi) of |
| 2689 | * tasks they support. The iscsi layer reserves ISCSI_MGMT_CMDS_MAX tasks |
| 2690 | * for nop handling and login/logout requests. |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2691 | */ |
| 2692 | struct iscsi_cls_session * |
| 2693 | iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost, |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 2694 | uint16_t cmds_max, int dd_size, int cmd_task_size, |
Mike Christie | 7970634 | 2008-05-21 15:54:12 -0500 | [diff] [blame] | 2695 | uint32_t initial_cmdsn, unsigned int id) |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2696 | { |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2697 | struct iscsi_host *ihost = shost_priv(shost); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2698 | struct iscsi_session *session; |
| 2699 | struct iscsi_cls_session *cls_session; |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2700 | int cmd_i, scsi_cmds, total_cmds = cmds_max; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2701 | unsigned long flags; |
| 2702 | |
| 2703 | spin_lock_irqsave(&ihost->lock, flags); |
| 2704 | if (ihost->state == ISCSI_HOST_REMOVED) { |
| 2705 | spin_unlock_irqrestore(&ihost->lock, flags); |
| 2706 | return NULL; |
| 2707 | } |
| 2708 | ihost->num_sessions++; |
| 2709 | spin_unlock_irqrestore(&ihost->lock, flags); |
Mike Christie | 8e9a20c | 2008-06-16 10:11:33 -0500 | [diff] [blame] | 2710 | |
| 2711 | if (!total_cmds) |
| 2712 | total_cmds = ISCSI_DEF_XMIT_CMDS_MAX; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 2713 | /* |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2714 | * The iscsi layer needs some tasks for nop handling and tmfs, |
| 2715 | * so the cmds_max must at least be greater than ISCSI_MGMT_CMDS_MAX |
| 2716 | * + 1 command for scsi IO. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 2717 | */ |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2718 | if (total_cmds < ISCSI_TOTAL_CMDS_MIN) { |
| 2719 | printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " |
| 2720 | "must be a power of two that is at least %d.\n", |
| 2721 | total_cmds, ISCSI_TOTAL_CMDS_MIN); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2722 | goto dec_session_count; |
Mike Christie | 1548271 | 2007-05-30 12:57:19 -0500 | [diff] [blame] | 2723 | } |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2724 | |
| 2725 | if (total_cmds > ISCSI_TOTAL_CMDS_MAX) { |
| 2726 | printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " |
| 2727 | "must be a power of 2 less than or equal to %d.\n", |
| 2728 | cmds_max, ISCSI_TOTAL_CMDS_MAX); |
| 2729 | total_cmds = ISCSI_TOTAL_CMDS_MAX; |
| 2730 | } |
| 2731 | |
| 2732 | if (!is_power_of_2(total_cmds)) { |
| 2733 | printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " |
| 2734 | "must be a power of 2.\n", total_cmds); |
| 2735 | total_cmds = rounddown_pow_of_two(total_cmds); |
| 2736 | if (total_cmds < ISCSI_TOTAL_CMDS_MIN) |
| 2737 | return NULL; |
| 2738 | printk(KERN_INFO "iscsi: Rounding can_queue to %d.\n", |
| 2739 | total_cmds); |
| 2740 | } |
| 2741 | scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX; |
Mike Christie | 1548271 | 2007-05-30 12:57:19 -0500 | [diff] [blame] | 2742 | |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2743 | cls_session = iscsi_alloc_session(shost, iscsit, |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 2744 | sizeof(struct iscsi_session) + |
| 2745 | dd_size); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2746 | if (!cls_session) |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2747 | goto dec_session_count; |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2748 | session = cls_session->dd_data; |
| 2749 | session->cls_session = cls_session; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2750 | session->host = shost; |
| 2751 | session->state = ISCSI_STATE_FREE; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2752 | session->fast_abort = 1; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2753 | session->tgt_reset_timeout = 30; |
Mike Christie | 4cd49ea | 2007-12-13 12:43:38 -0600 | [diff] [blame] | 2754 | session->lu_reset_timeout = 15; |
| 2755 | session->abort_timeout = 10; |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2756 | session->scsi_cmds_max = scsi_cmds; |
| 2757 | session->cmds_max = total_cmds; |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 2758 | session->queued_cmdsn = session->cmdsn = initial_cmdsn; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2759 | session->exp_cmdsn = initial_cmdsn + 1; |
| 2760 | session->max_cmdsn = initial_cmdsn + 1; |
| 2761 | session->max_r2t = 1; |
| 2762 | session->tt = iscsit; |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 2763 | session->dd_data = cls_session->dd_data + sizeof(*session); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2764 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2765 | mutex_init(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2766 | spin_lock_init(&session->frwd_lock); |
| 2767 | spin_lock_init(&session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2768 | |
| 2769 | /* initialize SCSI PDU commands pool */ |
| 2770 | if (iscsi_pool_init(&session->cmdpool, session->cmds_max, |
| 2771 | (void***)&session->cmds, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2772 | cmd_task_size + sizeof(struct iscsi_task))) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2773 | goto cmdpool_alloc_fail; |
| 2774 | |
| 2775 | /* pre-format cmds pool with ITT */ |
| 2776 | for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2777 | struct iscsi_task *task = session->cmds[cmd_i]; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2778 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2779 | if (cmd_task_size) |
| 2780 | task->dd_data = &task[1]; |
| 2781 | task->itt = cmd_i; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 2782 | task->state = ISCSI_TASK_FREE; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2783 | INIT_LIST_HEAD(&task->running); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2784 | } |
| 2785 | |
Mike Christie | f53a88d | 2006-06-28 12:00:27 -0500 | [diff] [blame] | 2786 | if (!try_module_get(iscsit->owner)) |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2787 | goto module_get_fail; |
| 2788 | |
Mike Christie | 7970634 | 2008-05-21 15:54:12 -0500 | [diff] [blame] | 2789 | if (iscsi_add_session(cls_session, id)) |
Mike Christie | f53a88d | 2006-06-28 12:00:27 -0500 | [diff] [blame] | 2790 | goto cls_session_fail; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2791 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2792 | return cls_session; |
| 2793 | |
| 2794 | cls_session_fail: |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2795 | module_put(iscsit->owner); |
| 2796 | module_get_fail: |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2797 | iscsi_pool_free(&session->cmdpool); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2798 | cmdpool_alloc_fail: |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2799 | iscsi_free_session(cls_session); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2800 | dec_session_count: |
| 2801 | iscsi_host_dec_session_cnt(shost); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2802 | return NULL; |
| 2803 | } |
| 2804 | EXPORT_SYMBOL_GPL(iscsi_session_setup); |
| 2805 | |
| 2806 | /** |
| 2807 | * iscsi_session_teardown - destroy session, host, and cls_session |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2808 | * @cls_session: iscsi session |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2809 | * |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2810 | * The driver must have called iscsi_remove_session before |
| 2811 | * calling this. |
| 2812 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2813 | void iscsi_session_teardown(struct iscsi_cls_session *cls_session) |
| 2814 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2815 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | 63f75cc | 2006-07-24 15:47:29 -0500 | [diff] [blame] | 2816 | struct module *owner = cls_session->transport->owner; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2817 | struct Scsi_Host *shost = session->host; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2818 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2819 | iscsi_pool_free(&session->cmdpool); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2820 | |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 2821 | kfree(session->password); |
| 2822 | kfree(session->password_in); |
| 2823 | kfree(session->username); |
| 2824 | kfree(session->username_in); |
Mike Christie | f3ff0c3 | 2006-07-24 15:47:50 -0500 | [diff] [blame] | 2825 | kfree(session->targetname); |
Vikas Chaudhary | 3c5c480 | 2012-01-19 03:06:53 -0800 | [diff] [blame] | 2826 | kfree(session->targetalias); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 2827 | kfree(session->initiatorname); |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 2828 | kfree(session->boot_root); |
| 2829 | kfree(session->boot_nic); |
| 2830 | kfree(session->boot_target); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 2831 | kfree(session->ifacename); |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 2832 | kfree(session->portal_type); |
| 2833 | kfree(session->discovery_parent_type); |
Mike Christie | f3ff0c3 | 2006-07-24 15:47:50 -0500 | [diff] [blame] | 2834 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2835 | iscsi_destroy_session(cls_session); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2836 | iscsi_host_dec_session_cnt(shost); |
Mike Christie | 63f75cc | 2006-07-24 15:47:29 -0500 | [diff] [blame] | 2837 | module_put(owner); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2838 | } |
| 2839 | EXPORT_SYMBOL_GPL(iscsi_session_teardown); |
| 2840 | |
| 2841 | /** |
| 2842 | * iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn |
| 2843 | * @cls_session: iscsi_cls_session |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2844 | * @dd_size: private driver data size |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2845 | * @conn_idx: cid |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2846 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2847 | struct iscsi_cls_conn * |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2848 | iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, |
| 2849 | uint32_t conn_idx) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2850 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2851 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2852 | struct iscsi_conn *conn; |
| 2853 | struct iscsi_cls_conn *cls_conn; |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2854 | char *data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2855 | |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2856 | cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size, |
| 2857 | conn_idx); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2858 | if (!cls_conn) |
| 2859 | return NULL; |
| 2860 | conn = cls_conn->dd_data; |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2861 | memset(conn, 0, sizeof(*conn) + dd_size); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2862 | |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2863 | conn->dd_data = cls_conn->dd_data + sizeof(*conn); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2864 | conn->session = session; |
| 2865 | conn->cls_conn = cls_conn; |
| 2866 | conn->c_stage = ISCSI_CONN_INITIAL_STAGE; |
| 2867 | conn->id = conn_idx; |
| 2868 | conn->exp_statsn = 0; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2869 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2870 | |
| 2871 | init_timer(&conn->transport_timer); |
| 2872 | conn->transport_timer.data = (unsigned long)conn; |
| 2873 | conn->transport_timer.function = iscsi_check_transport_timeouts; |
| 2874 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2875 | INIT_LIST_HEAD(&conn->mgmtqueue); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 2876 | INIT_LIST_HEAD(&conn->cmdqueue); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2877 | INIT_LIST_HEAD(&conn->requeue); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2878 | INIT_WORK(&conn->xmitwork, iscsi_xmitworker); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2879 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2880 | /* allocate login_task used for the login/text sequences */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2881 | spin_lock_bh(&session->frwd_lock); |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2882 | if (!kfifo_out(&session->cmdpool.queue, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2883 | (void*)&conn->login_task, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2884 | sizeof(void*))) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2885 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2886 | goto login_task_alloc_fail; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2887 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2888 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2889 | |
Mike Christie | cfeb2cf | 2008-12-02 00:32:09 -0600 | [diff] [blame] | 2890 | data = (char *) __get_free_pages(GFP_KERNEL, |
| 2891 | get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2892 | if (!data) |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2893 | goto login_task_data_alloc_fail; |
| 2894 | conn->login_task->data = conn->data = data; |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2895 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2896 | init_timer(&conn->tmf_timer); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2897 | init_waitqueue_head(&conn->ehwait); |
| 2898 | |
| 2899 | return cls_conn; |
| 2900 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2901 | login_task_data_alloc_fail: |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2902 | kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task, |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2903 | sizeof(void*)); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2904 | login_task_alloc_fail: |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2905 | iscsi_destroy_conn(cls_conn); |
| 2906 | return NULL; |
| 2907 | } |
| 2908 | EXPORT_SYMBOL_GPL(iscsi_conn_setup); |
| 2909 | |
| 2910 | /** |
| 2911 | * iscsi_conn_teardown - teardown iscsi connection |
| 2912 | * cls_conn: iscsi class connection |
| 2913 | * |
| 2914 | * TODO: we may need to make this into a two step process |
| 2915 | * like scsi-mls remove + put host |
| 2916 | */ |
| 2917 | void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn) |
| 2918 | { |
| 2919 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 2920 | struct iscsi_session *session = conn->session; |
| 2921 | unsigned long flags; |
| 2922 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2923 | del_timer_sync(&conn->transport_timer); |
| 2924 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2925 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2926 | conn->c_stage = ISCSI_CONN_CLEANUP_WAIT; |
| 2927 | if (session->leadconn == conn) { |
| 2928 | /* |
| 2929 | * leading connection? then give up on recovery. |
| 2930 | */ |
| 2931 | session->state = ISCSI_STATE_TERMINATE; |
| 2932 | wake_up(&conn->ehwait); |
| 2933 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2934 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2935 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2936 | /* |
| 2937 | * Block until all in-progress commands for this connection |
| 2938 | * time out or fail. |
| 2939 | */ |
| 2940 | for (;;) { |
| 2941 | spin_lock_irqsave(session->host->host_lock, flags); |
| 2942 | if (!session->host->host_busy) { /* OK for ERL == 0 */ |
| 2943 | spin_unlock_irqrestore(session->host->host_lock, flags); |
| 2944 | break; |
| 2945 | } |
| 2946 | spin_unlock_irqrestore(session->host->host_lock, flags); |
| 2947 | msleep_interruptible(500); |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2948 | iscsi_conn_printk(KERN_INFO, conn, "iscsi conn_destroy(): " |
| 2949 | "host_busy %d host_failed %d\n", |
| 2950 | session->host->host_busy, |
| 2951 | session->host->host_failed); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2952 | /* |
| 2953 | * force eh_abort() to unblock |
| 2954 | */ |
| 2955 | wake_up(&conn->ehwait); |
| 2956 | } |
| 2957 | |
Mike Christie | 779ea12 | 2007-02-28 17:32:15 -0600 | [diff] [blame] | 2958 | /* flush queued up work because we free the connection below */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2959 | iscsi_suspend_tx(conn); |
Mike Christie | 779ea12 | 2007-02-28 17:32:15 -0600 | [diff] [blame] | 2960 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2961 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | cfeb2cf | 2008-12-02 00:32:09 -0600 | [diff] [blame] | 2962 | free_pages((unsigned long) conn->data, |
| 2963 | get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); |
Mike Christie | f3ff0c3 | 2006-07-24 15:47:50 -0500 | [diff] [blame] | 2964 | kfree(conn->persistent_address); |
Adheer Chandravanshi | ae56ff4 | 2013-11-22 05:28:21 -0500 | [diff] [blame] | 2965 | kfree(conn->local_ipaddr); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2966 | /* regular RX path uses back_lock */ |
| 2967 | spin_lock_bh(&session->back_lock); |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2968 | kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2969 | sizeof(void*)); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2970 | spin_unlock_bh(&session->back_lock); |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 2971 | if (session->leadconn == conn) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2972 | session->leadconn = NULL; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2973 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2974 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2975 | iscsi_destroy_conn(cls_conn); |
| 2976 | } |
| 2977 | EXPORT_SYMBOL_GPL(iscsi_conn_teardown); |
| 2978 | |
| 2979 | int iscsi_conn_start(struct iscsi_cls_conn *cls_conn) |
| 2980 | { |
| 2981 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 2982 | struct iscsi_session *session = conn->session; |
| 2983 | |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 2984 | if (!session) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2985 | iscsi_conn_printk(KERN_ERR, conn, |
| 2986 | "can't start unbound connection\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2987 | return -EPERM; |
| 2988 | } |
| 2989 | |
Mike Christie | db98ccd | 2006-08-31 18:09:31 -0400 | [diff] [blame] | 2990 | if ((session->imm_data_en || !session->initial_r2t_en) && |
| 2991 | session->first_burst > session->max_burst) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2992 | iscsi_conn_printk(KERN_INFO, conn, "invalid burst lengths: " |
| 2993 | "first_burst %d max_burst %d\n", |
| 2994 | session->first_burst, session->max_burst); |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 2995 | return -EINVAL; |
| 2996 | } |
| 2997 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2998 | if (conn->ping_timeout && !conn->recv_timeout) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2999 | iscsi_conn_printk(KERN_ERR, conn, "invalid recv timeout of " |
| 3000 | "zero. Using 5 seconds\n."); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3001 | conn->recv_timeout = 5; |
| 3002 | } |
| 3003 | |
| 3004 | if (conn->recv_timeout && !conn->ping_timeout) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3005 | iscsi_conn_printk(KERN_ERR, conn, "invalid ping timeout of " |
| 3006 | "zero. Using 5 seconds.\n"); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3007 | conn->ping_timeout = 5; |
| 3008 | } |
| 3009 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3010 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3011 | conn->c_stage = ISCSI_CONN_STARTED; |
| 3012 | session->state = ISCSI_STATE_LOGGED_IN; |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 3013 | session->queued_cmdsn = session->cmdsn; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3014 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3015 | conn->last_recv = jiffies; |
| 3016 | conn->last_ping = jiffies; |
| 3017 | if (conn->recv_timeout && conn->ping_timeout) |
| 3018 | mod_timer(&conn->transport_timer, |
| 3019 | jiffies + (conn->recv_timeout * HZ)); |
| 3020 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3021 | switch(conn->stop_stage) { |
| 3022 | case STOP_CONN_RECOVER: |
| 3023 | /* |
| 3024 | * unblock eh_abort() if it is blocked. re-try all |
| 3025 | * commands after successful recovery |
| 3026 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3027 | conn->stop_stage = 0; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 3028 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3029 | session->age++; |
Mike Christie | 8b1d034 | 2008-01-31 13:36:53 -0600 | [diff] [blame] | 3030 | if (session->age == 16) |
| 3031 | session->age = 0; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 3032 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3033 | case STOP_CONN_TERM: |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3034 | conn->stop_stage = 0; |
| 3035 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3036 | default: |
| 3037 | break; |
| 3038 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3039 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3040 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3041 | iscsi_unblock_session(session->cls_session); |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 3042 | wake_up(&conn->ehwait); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3043 | return 0; |
| 3044 | } |
| 3045 | EXPORT_SYMBOL_GPL(iscsi_conn_start); |
| 3046 | |
| 3047 | static void |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3048 | fail_mgmt_tasks(struct iscsi_session *session, struct iscsi_conn *conn) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3049 | { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3050 | struct iscsi_task *task; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 3051 | int i, state; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3052 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3053 | for (i = 0; i < conn->session->cmds_max; i++) { |
| 3054 | task = conn->session->cmds[i]; |
| 3055 | if (task->sc) |
| 3056 | continue; |
| 3057 | |
| 3058 | if (task->state == ISCSI_TASK_FREE) |
| 3059 | continue; |
| 3060 | |
| 3061 | ISCSI_DBG_SESSION(conn->session, |
| 3062 | "failing mgmt itt 0x%x state %d\n", |
| 3063 | task->itt, task->state); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 3064 | state = ISCSI_TASK_ABRT_SESS_RECOV; |
| 3065 | if (task->state == ISCSI_TASK_PENDING) |
| 3066 | state = ISCSI_TASK_COMPLETED; |
| 3067 | iscsi_complete_task(task, state); |
| 3068 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3069 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3070 | } |
| 3071 | |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3072 | static void iscsi_start_session_recovery(struct iscsi_session *session, |
| 3073 | struct iscsi_conn *conn, int flag) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3074 | { |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3075 | int old_stop_stage; |
| 3076 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3077 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3078 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3079 | if (conn->stop_stage == STOP_CONN_TERM) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3080 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3081 | mutex_unlock(&session->eh_mutex); |
| 3082 | return; |
| 3083 | } |
| 3084 | |
| 3085 | /* |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3086 | * When this is called for the in_login state, we only want to clean |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 3087 | * up the login task and connection. We do not need to block and set |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3088 | * the recovery state again |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3089 | */ |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3090 | if (flag == STOP_CONN_TERM) |
| 3091 | session->state = ISCSI_STATE_TERMINATE; |
| 3092 | else if (conn->stop_stage != STOP_CONN_RECOVER) |
| 3093 | session->state = ISCSI_STATE_IN_RECOVERY; |
Mike Christie | 4ae0a6c | 2010-03-09 14:14:51 -0600 | [diff] [blame] | 3094 | |
| 3095 | old_stop_stage = conn->stop_stage; |
| 3096 | conn->stop_stage = flag; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3097 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3098 | |
Mike Christie | 26013ad | 2009-05-13 17:57:43 -0500 | [diff] [blame] | 3099 | del_timer_sync(&conn->transport_timer); |
| 3100 | iscsi_suspend_tx(conn); |
| 3101 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3102 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3103 | conn->c_stage = ISCSI_CONN_STOPPED; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3104 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3105 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3106 | /* |
| 3107 | * for connection level recovery we should not calculate |
| 3108 | * header digest. conn->hdr_size used for optimization |
| 3109 | * in hdr_extract() and will be re-negotiated at |
| 3110 | * set_param() time. |
| 3111 | */ |
| 3112 | if (flag == STOP_CONN_RECOVER) { |
| 3113 | conn->hdrdgst_en = 0; |
| 3114 | conn->datadgst_en = 0; |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3115 | if (session->state == ISCSI_STATE_IN_RECOVERY && |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3116 | old_stop_stage != STOP_CONN_RECOVER) { |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 3117 | ISCSI_DBG_SESSION(session, "blocking session\n"); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3118 | iscsi_block_session(session->cls_session); |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3119 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3120 | } |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3121 | |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3122 | /* |
| 3123 | * flush queues. |
| 3124 | */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3125 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 3126 | fail_scsi_tasks(conn, -1, DID_TRANSPORT_DISRUPTED); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3127 | fail_mgmt_tasks(session, conn); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 3128 | memset(&conn->tmhdr, 0, sizeof(conn->tmhdr)); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3129 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3130 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3131 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3132 | |
| 3133 | void iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) |
| 3134 | { |
| 3135 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3136 | struct iscsi_session *session = conn->session; |
| 3137 | |
| 3138 | switch (flag) { |
| 3139 | case STOP_CONN_RECOVER: |
| 3140 | case STOP_CONN_TERM: |
| 3141 | iscsi_start_session_recovery(session, conn, flag); |
Mike Christie | 8d2860b | 2006-05-02 19:46:47 -0500 | [diff] [blame] | 3142 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3143 | default: |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3144 | iscsi_conn_printk(KERN_ERR, conn, |
| 3145 | "invalid stop flag %d\n", flag); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3146 | } |
| 3147 | } |
| 3148 | EXPORT_SYMBOL_GPL(iscsi_conn_stop); |
| 3149 | |
| 3150 | int iscsi_conn_bind(struct iscsi_cls_session *cls_session, |
| 3151 | struct iscsi_cls_conn *cls_conn, int is_leading) |
| 3152 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3153 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | 9864404 | 2006-10-16 18:09:39 -0400 | [diff] [blame] | 3154 | struct iscsi_conn *conn = cls_conn->dd_data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3155 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3156 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3157 | if (is_leading) |
| 3158 | session->leadconn = conn; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3159 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3160 | |
| 3161 | /* |
| 3162 | * Unblock xmitworker(), Login Phase will pass through. |
| 3163 | */ |
| 3164 | clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |
| 3165 | clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
| 3166 | return 0; |
| 3167 | } |
| 3168 | EXPORT_SYMBOL_GPL(iscsi_conn_bind); |
| 3169 | |
Adheer Chandravanshi | adaf699 | 2013-03-22 07:41:30 -0400 | [diff] [blame] | 3170 | int iscsi_switch_str_param(char **param, char *new_val_buf) |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3171 | { |
| 3172 | char *new_val; |
| 3173 | |
| 3174 | if (*param) { |
| 3175 | if (!strcmp(*param, new_val_buf)) |
| 3176 | return 0; |
| 3177 | } |
| 3178 | |
| 3179 | new_val = kstrdup(new_val_buf, GFP_NOIO); |
| 3180 | if (!new_val) |
| 3181 | return -ENOMEM; |
| 3182 | |
| 3183 | kfree(*param); |
| 3184 | *param = new_val; |
| 3185 | return 0; |
| 3186 | } |
Adheer Chandravanshi | adaf699 | 2013-03-22 07:41:30 -0400 | [diff] [blame] | 3187 | EXPORT_SYMBOL_GPL(iscsi_switch_str_param); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3188 | |
| 3189 | int iscsi_set_param(struct iscsi_cls_conn *cls_conn, |
| 3190 | enum iscsi_param param, char *buf, int buflen) |
| 3191 | { |
| 3192 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3193 | struct iscsi_session *session = conn->session; |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 3194 | int val; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3195 | |
| 3196 | switch(param) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 3197 | case ISCSI_PARAM_FAST_ABORT: |
| 3198 | sscanf(buf, "%d", &session->fast_abort); |
| 3199 | break; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3200 | case ISCSI_PARAM_ABORT_TMO: |
| 3201 | sscanf(buf, "%d", &session->abort_timeout); |
| 3202 | break; |
| 3203 | case ISCSI_PARAM_LU_RESET_TMO: |
| 3204 | sscanf(buf, "%d", &session->lu_reset_timeout); |
| 3205 | break; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 3206 | case ISCSI_PARAM_TGT_RESET_TMO: |
| 3207 | sscanf(buf, "%d", &session->tgt_reset_timeout); |
| 3208 | break; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3209 | case ISCSI_PARAM_PING_TMO: |
| 3210 | sscanf(buf, "%d", &conn->ping_timeout); |
| 3211 | break; |
| 3212 | case ISCSI_PARAM_RECV_TMO: |
| 3213 | sscanf(buf, "%d", &conn->recv_timeout); |
| 3214 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3215 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| 3216 | sscanf(buf, "%d", &conn->max_recv_dlength); |
| 3217 | break; |
| 3218 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
| 3219 | sscanf(buf, "%d", &conn->max_xmit_dlength); |
| 3220 | break; |
| 3221 | case ISCSI_PARAM_HDRDGST_EN: |
| 3222 | sscanf(buf, "%d", &conn->hdrdgst_en); |
| 3223 | break; |
| 3224 | case ISCSI_PARAM_DATADGST_EN: |
| 3225 | sscanf(buf, "%d", &conn->datadgst_en); |
| 3226 | break; |
| 3227 | case ISCSI_PARAM_INITIAL_R2T_EN: |
| 3228 | sscanf(buf, "%d", &session->initial_r2t_en); |
| 3229 | break; |
| 3230 | case ISCSI_PARAM_MAX_R2T: |
Mike Christie | 1304be5 | 2012-01-26 21:13:10 -0600 | [diff] [blame] | 3231 | sscanf(buf, "%hu", &session->max_r2t); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3232 | break; |
| 3233 | case ISCSI_PARAM_IMM_DATA_EN: |
| 3234 | sscanf(buf, "%d", &session->imm_data_en); |
| 3235 | break; |
| 3236 | case ISCSI_PARAM_FIRST_BURST: |
| 3237 | sscanf(buf, "%d", &session->first_burst); |
| 3238 | break; |
| 3239 | case ISCSI_PARAM_MAX_BURST: |
| 3240 | sscanf(buf, "%d", &session->max_burst); |
| 3241 | break; |
| 3242 | case ISCSI_PARAM_PDU_INORDER_EN: |
| 3243 | sscanf(buf, "%d", &session->pdu_inorder_en); |
| 3244 | break; |
| 3245 | case ISCSI_PARAM_DATASEQ_INORDER_EN: |
| 3246 | sscanf(buf, "%d", &session->dataseq_inorder_en); |
| 3247 | break; |
| 3248 | case ISCSI_PARAM_ERL: |
| 3249 | sscanf(buf, "%d", &session->erl); |
| 3250 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3251 | case ISCSI_PARAM_EXP_STATSN: |
| 3252 | sscanf(buf, "%u", &conn->exp_statsn); |
| 3253 | break; |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3254 | case ISCSI_PARAM_USERNAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3255 | return iscsi_switch_str_param(&session->username, buf); |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3256 | case ISCSI_PARAM_USERNAME_IN: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3257 | return iscsi_switch_str_param(&session->username_in, buf); |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3258 | case ISCSI_PARAM_PASSWORD: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3259 | return iscsi_switch_str_param(&session->password, buf); |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3260 | case ISCSI_PARAM_PASSWORD_IN: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3261 | return iscsi_switch_str_param(&session->password_in, buf); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3262 | case ISCSI_PARAM_TARGET_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3263 | return iscsi_switch_str_param(&session->targetname, buf); |
Vikas Chaudhary | 3c5c480 | 2012-01-19 03:06:53 -0800 | [diff] [blame] | 3264 | case ISCSI_PARAM_TARGET_ALIAS: |
| 3265 | return iscsi_switch_str_param(&session->targetalias, buf); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3266 | case ISCSI_PARAM_TPGT: |
| 3267 | sscanf(buf, "%d", &session->tpgt); |
| 3268 | break; |
| 3269 | case ISCSI_PARAM_PERSISTENT_PORT: |
| 3270 | sscanf(buf, "%d", &conn->persistent_port); |
| 3271 | break; |
| 3272 | case ISCSI_PARAM_PERSISTENT_ADDRESS: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3273 | return iscsi_switch_str_param(&conn->persistent_address, buf); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3274 | case ISCSI_PARAM_IFACE_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3275 | return iscsi_switch_str_param(&session->ifacename, buf); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3276 | case ISCSI_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3277 | return iscsi_switch_str_param(&session->initiatorname, buf); |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 3278 | case ISCSI_PARAM_BOOT_ROOT: |
| 3279 | return iscsi_switch_str_param(&session->boot_root, buf); |
| 3280 | case ISCSI_PARAM_BOOT_NIC: |
| 3281 | return iscsi_switch_str_param(&session->boot_nic, buf); |
| 3282 | case ISCSI_PARAM_BOOT_TARGET: |
| 3283 | return iscsi_switch_str_param(&session->boot_target, buf); |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3284 | case ISCSI_PARAM_PORTAL_TYPE: |
| 3285 | return iscsi_switch_str_param(&session->portal_type, buf); |
| 3286 | case ISCSI_PARAM_DISCOVERY_PARENT_TYPE: |
| 3287 | return iscsi_switch_str_param(&session->discovery_parent_type, |
| 3288 | buf); |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 3289 | case ISCSI_PARAM_DISCOVERY_SESS: |
| 3290 | sscanf(buf, "%d", &val); |
| 3291 | session->discovery_sess = !!val; |
| 3292 | break; |
Adheer Chandravanshi | ae56ff4 | 2013-11-22 05:28:21 -0500 | [diff] [blame] | 3293 | case ISCSI_PARAM_LOCAL_IPADDR: |
| 3294 | return iscsi_switch_str_param(&conn->local_ipaddr, buf); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3295 | default: |
| 3296 | return -ENOSYS; |
| 3297 | } |
| 3298 | |
| 3299 | return 0; |
| 3300 | } |
| 3301 | EXPORT_SYMBOL_GPL(iscsi_set_param); |
| 3302 | |
| 3303 | int iscsi_session_get_param(struct iscsi_cls_session *cls_session, |
| 3304 | enum iscsi_param param, char *buf) |
| 3305 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3306 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3307 | int len; |
| 3308 | |
| 3309 | switch(param) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 3310 | case ISCSI_PARAM_FAST_ABORT: |
| 3311 | len = sprintf(buf, "%d\n", session->fast_abort); |
| 3312 | break; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3313 | case ISCSI_PARAM_ABORT_TMO: |
| 3314 | len = sprintf(buf, "%d\n", session->abort_timeout); |
| 3315 | break; |
| 3316 | case ISCSI_PARAM_LU_RESET_TMO: |
| 3317 | len = sprintf(buf, "%d\n", session->lu_reset_timeout); |
| 3318 | break; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 3319 | case ISCSI_PARAM_TGT_RESET_TMO: |
| 3320 | len = sprintf(buf, "%d\n", session->tgt_reset_timeout); |
| 3321 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3322 | case ISCSI_PARAM_INITIAL_R2T_EN: |
| 3323 | len = sprintf(buf, "%d\n", session->initial_r2t_en); |
| 3324 | break; |
| 3325 | case ISCSI_PARAM_MAX_R2T: |
| 3326 | len = sprintf(buf, "%hu\n", session->max_r2t); |
| 3327 | break; |
| 3328 | case ISCSI_PARAM_IMM_DATA_EN: |
| 3329 | len = sprintf(buf, "%d\n", session->imm_data_en); |
| 3330 | break; |
| 3331 | case ISCSI_PARAM_FIRST_BURST: |
| 3332 | len = sprintf(buf, "%u\n", session->first_burst); |
| 3333 | break; |
| 3334 | case ISCSI_PARAM_MAX_BURST: |
| 3335 | len = sprintf(buf, "%u\n", session->max_burst); |
| 3336 | break; |
| 3337 | case ISCSI_PARAM_PDU_INORDER_EN: |
| 3338 | len = sprintf(buf, "%d\n", session->pdu_inorder_en); |
| 3339 | break; |
| 3340 | case ISCSI_PARAM_DATASEQ_INORDER_EN: |
| 3341 | len = sprintf(buf, "%d\n", session->dataseq_inorder_en); |
| 3342 | break; |
Adheer Chandravanshi | 5f09e1f | 2013-07-22 07:46:10 -0400 | [diff] [blame] | 3343 | case ISCSI_PARAM_DEF_TASKMGMT_TMO: |
| 3344 | len = sprintf(buf, "%d\n", session->def_taskmgmt_tmo); |
| 3345 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3346 | case ISCSI_PARAM_ERL: |
| 3347 | len = sprintf(buf, "%d\n", session->erl); |
| 3348 | break; |
| 3349 | case ISCSI_PARAM_TARGET_NAME: |
| 3350 | len = sprintf(buf, "%s\n", session->targetname); |
| 3351 | break; |
Vikas Chaudhary | 3c5c480 | 2012-01-19 03:06:53 -0800 | [diff] [blame] | 3352 | case ISCSI_PARAM_TARGET_ALIAS: |
| 3353 | len = sprintf(buf, "%s\n", session->targetalias); |
| 3354 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3355 | case ISCSI_PARAM_TPGT: |
| 3356 | len = sprintf(buf, "%d\n", session->tpgt); |
| 3357 | break; |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3358 | case ISCSI_PARAM_USERNAME: |
| 3359 | len = sprintf(buf, "%s\n", session->username); |
| 3360 | break; |
| 3361 | case ISCSI_PARAM_USERNAME_IN: |
| 3362 | len = sprintf(buf, "%s\n", session->username_in); |
| 3363 | break; |
| 3364 | case ISCSI_PARAM_PASSWORD: |
| 3365 | len = sprintf(buf, "%s\n", session->password); |
| 3366 | break; |
| 3367 | case ISCSI_PARAM_PASSWORD_IN: |
| 3368 | len = sprintf(buf, "%s\n", session->password_in); |
| 3369 | break; |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3370 | case ISCSI_PARAM_IFACE_NAME: |
| 3371 | len = sprintf(buf, "%s\n", session->ifacename); |
| 3372 | break; |
| 3373 | case ISCSI_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3374 | len = sprintf(buf, "%s\n", session->initiatorname); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3375 | break; |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 3376 | case ISCSI_PARAM_BOOT_ROOT: |
| 3377 | len = sprintf(buf, "%s\n", session->boot_root); |
| 3378 | break; |
| 3379 | case ISCSI_PARAM_BOOT_NIC: |
| 3380 | len = sprintf(buf, "%s\n", session->boot_nic); |
| 3381 | break; |
| 3382 | case ISCSI_PARAM_BOOT_TARGET: |
| 3383 | len = sprintf(buf, "%s\n", session->boot_target); |
Adheer Chandravanshi | 9a2307b | 2013-07-22 07:46:09 -0400 | [diff] [blame] | 3384 | break; |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3385 | case ISCSI_PARAM_AUTO_SND_TGT_DISABLE: |
| 3386 | len = sprintf(buf, "%u\n", session->auto_snd_tgt_disable); |
| 3387 | break; |
| 3388 | case ISCSI_PARAM_DISCOVERY_SESS: |
| 3389 | len = sprintf(buf, "%u\n", session->discovery_sess); |
| 3390 | break; |
| 3391 | case ISCSI_PARAM_PORTAL_TYPE: |
| 3392 | len = sprintf(buf, "%s\n", session->portal_type); |
| 3393 | break; |
| 3394 | case ISCSI_PARAM_CHAP_AUTH_EN: |
| 3395 | len = sprintf(buf, "%u\n", session->chap_auth_en); |
| 3396 | break; |
| 3397 | case ISCSI_PARAM_DISCOVERY_LOGOUT_EN: |
| 3398 | len = sprintf(buf, "%u\n", session->discovery_logout_en); |
| 3399 | break; |
| 3400 | case ISCSI_PARAM_BIDI_CHAP_EN: |
| 3401 | len = sprintf(buf, "%u\n", session->bidi_chap_en); |
| 3402 | break; |
| 3403 | case ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL: |
| 3404 | len = sprintf(buf, "%u\n", session->discovery_auth_optional); |
| 3405 | break; |
| 3406 | case ISCSI_PARAM_DEF_TIME2WAIT: |
| 3407 | len = sprintf(buf, "%d\n", session->time2wait); |
| 3408 | break; |
| 3409 | case ISCSI_PARAM_DEF_TIME2RETAIN: |
| 3410 | len = sprintf(buf, "%d\n", session->time2retain); |
| 3411 | break; |
| 3412 | case ISCSI_PARAM_TSID: |
| 3413 | len = sprintf(buf, "%u\n", session->tsid); |
| 3414 | break; |
| 3415 | case ISCSI_PARAM_ISID: |
| 3416 | len = sprintf(buf, "%02x%02x%02x%02x%02x%02x\n", |
| 3417 | session->isid[0], session->isid[1], |
| 3418 | session->isid[2], session->isid[3], |
| 3419 | session->isid[4], session->isid[5]); |
| 3420 | break; |
| 3421 | case ISCSI_PARAM_DISCOVERY_PARENT_IDX: |
| 3422 | len = sprintf(buf, "%u\n", session->discovery_parent_idx); |
| 3423 | break; |
| 3424 | case ISCSI_PARAM_DISCOVERY_PARENT_TYPE: |
| 3425 | if (session->discovery_parent_type) |
| 3426 | len = sprintf(buf, "%s\n", |
| 3427 | session->discovery_parent_type); |
| 3428 | else |
| 3429 | len = sprintf(buf, "\n"); |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 3430 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3431 | default: |
| 3432 | return -ENOSYS; |
| 3433 | } |
| 3434 | |
| 3435 | return len; |
| 3436 | } |
| 3437 | EXPORT_SYMBOL_GPL(iscsi_session_get_param); |
| 3438 | |
Mike Christie | 00f3708 | 2011-02-16 15:04:35 -0600 | [diff] [blame] | 3439 | int iscsi_conn_get_addr_param(struct sockaddr_storage *addr, |
| 3440 | enum iscsi_param param, char *buf) |
| 3441 | { |
| 3442 | struct sockaddr_in6 *sin6 = NULL; |
| 3443 | struct sockaddr_in *sin = NULL; |
| 3444 | int len; |
| 3445 | |
| 3446 | switch (addr->ss_family) { |
| 3447 | case AF_INET: |
| 3448 | sin = (struct sockaddr_in *)addr; |
| 3449 | break; |
| 3450 | case AF_INET6: |
| 3451 | sin6 = (struct sockaddr_in6 *)addr; |
| 3452 | break; |
| 3453 | default: |
| 3454 | return -EINVAL; |
| 3455 | } |
| 3456 | |
| 3457 | switch (param) { |
| 3458 | case ISCSI_PARAM_CONN_ADDRESS: |
| 3459 | case ISCSI_HOST_PARAM_IPADDRESS: |
| 3460 | if (sin) |
| 3461 | len = sprintf(buf, "%pI4\n", &sin->sin_addr.s_addr); |
| 3462 | else |
| 3463 | len = sprintf(buf, "%pI6\n", &sin6->sin6_addr); |
| 3464 | break; |
| 3465 | case ISCSI_PARAM_CONN_PORT: |
| 3466 | if (sin) |
| 3467 | len = sprintf(buf, "%hu\n", be16_to_cpu(sin->sin_port)); |
| 3468 | else |
| 3469 | len = sprintf(buf, "%hu\n", |
| 3470 | be16_to_cpu(sin6->sin6_port)); |
| 3471 | break; |
| 3472 | default: |
| 3473 | return -EINVAL; |
| 3474 | } |
| 3475 | |
| 3476 | return len; |
| 3477 | } |
| 3478 | EXPORT_SYMBOL_GPL(iscsi_conn_get_addr_param); |
| 3479 | |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3480 | int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| 3481 | enum iscsi_param param, char *buf) |
| 3482 | { |
| 3483 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3484 | int len; |
| 3485 | |
| 3486 | switch(param) { |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3487 | case ISCSI_PARAM_PING_TMO: |
| 3488 | len = sprintf(buf, "%u\n", conn->ping_timeout); |
| 3489 | break; |
| 3490 | case ISCSI_PARAM_RECV_TMO: |
| 3491 | len = sprintf(buf, "%u\n", conn->recv_timeout); |
| 3492 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3493 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| 3494 | len = sprintf(buf, "%u\n", conn->max_recv_dlength); |
| 3495 | break; |
| 3496 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
| 3497 | len = sprintf(buf, "%u\n", conn->max_xmit_dlength); |
| 3498 | break; |
| 3499 | case ISCSI_PARAM_HDRDGST_EN: |
| 3500 | len = sprintf(buf, "%d\n", conn->hdrdgst_en); |
| 3501 | break; |
| 3502 | case ISCSI_PARAM_DATADGST_EN: |
| 3503 | len = sprintf(buf, "%d\n", conn->datadgst_en); |
| 3504 | break; |
| 3505 | case ISCSI_PARAM_IFMARKER_EN: |
| 3506 | len = sprintf(buf, "%d\n", conn->ifmarker_en); |
| 3507 | break; |
| 3508 | case ISCSI_PARAM_OFMARKER_EN: |
| 3509 | len = sprintf(buf, "%d\n", conn->ofmarker_en); |
| 3510 | break; |
| 3511 | case ISCSI_PARAM_EXP_STATSN: |
| 3512 | len = sprintf(buf, "%u\n", conn->exp_statsn); |
| 3513 | break; |
| 3514 | case ISCSI_PARAM_PERSISTENT_PORT: |
| 3515 | len = sprintf(buf, "%d\n", conn->persistent_port); |
| 3516 | break; |
| 3517 | case ISCSI_PARAM_PERSISTENT_ADDRESS: |
| 3518 | len = sprintf(buf, "%s\n", conn->persistent_address); |
| 3519 | break; |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3520 | case ISCSI_PARAM_STATSN: |
| 3521 | len = sprintf(buf, "%u\n", conn->statsn); |
| 3522 | break; |
| 3523 | case ISCSI_PARAM_MAX_SEGMENT_SIZE: |
| 3524 | len = sprintf(buf, "%u\n", conn->max_segment_size); |
| 3525 | break; |
| 3526 | case ISCSI_PARAM_KEEPALIVE_TMO: |
| 3527 | len = sprintf(buf, "%u\n", conn->keepalive_tmo); |
| 3528 | break; |
| 3529 | case ISCSI_PARAM_LOCAL_PORT: |
| 3530 | len = sprintf(buf, "%u\n", conn->local_port); |
| 3531 | break; |
| 3532 | case ISCSI_PARAM_TCP_TIMESTAMP_STAT: |
| 3533 | len = sprintf(buf, "%u\n", conn->tcp_timestamp_stat); |
| 3534 | break; |
| 3535 | case ISCSI_PARAM_TCP_NAGLE_DISABLE: |
| 3536 | len = sprintf(buf, "%u\n", conn->tcp_nagle_disable); |
| 3537 | break; |
| 3538 | case ISCSI_PARAM_TCP_WSF_DISABLE: |
| 3539 | len = sprintf(buf, "%u\n", conn->tcp_wsf_disable); |
| 3540 | break; |
| 3541 | case ISCSI_PARAM_TCP_TIMER_SCALE: |
| 3542 | len = sprintf(buf, "%u\n", conn->tcp_timer_scale); |
| 3543 | break; |
| 3544 | case ISCSI_PARAM_TCP_TIMESTAMP_EN: |
| 3545 | len = sprintf(buf, "%u\n", conn->tcp_timestamp_en); |
| 3546 | break; |
| 3547 | case ISCSI_PARAM_IP_FRAGMENT_DISABLE: |
| 3548 | len = sprintf(buf, "%u\n", conn->fragment_disable); |
| 3549 | break; |
| 3550 | case ISCSI_PARAM_IPV4_TOS: |
| 3551 | len = sprintf(buf, "%u\n", conn->ipv4_tos); |
| 3552 | break; |
| 3553 | case ISCSI_PARAM_IPV6_TC: |
| 3554 | len = sprintf(buf, "%u\n", conn->ipv6_traffic_class); |
| 3555 | break; |
Adheer Chandravanshi | 5f09e1f | 2013-07-22 07:46:10 -0400 | [diff] [blame] | 3556 | case ISCSI_PARAM_IPV6_FLOW_LABEL: |
| 3557 | len = sprintf(buf, "%u\n", conn->ipv6_flow_label); |
| 3558 | break; |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3559 | case ISCSI_PARAM_IS_FW_ASSIGNED_IPV6: |
| 3560 | len = sprintf(buf, "%u\n", conn->is_fw_assigned_ipv6); |
| 3561 | break; |
| 3562 | case ISCSI_PARAM_TCP_XMIT_WSF: |
| 3563 | len = sprintf(buf, "%u\n", conn->tcp_xmit_wsf); |
| 3564 | break; |
| 3565 | case ISCSI_PARAM_TCP_RECV_WSF: |
| 3566 | len = sprintf(buf, "%u\n", conn->tcp_recv_wsf); |
| 3567 | break; |
Adheer Chandravanshi | ae56ff4 | 2013-11-22 05:28:21 -0500 | [diff] [blame] | 3568 | case ISCSI_PARAM_LOCAL_IPADDR: |
| 3569 | len = sprintf(buf, "%s\n", conn->local_ipaddr); |
| 3570 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3571 | default: |
| 3572 | return -ENOSYS; |
| 3573 | } |
| 3574 | |
| 3575 | return len; |
| 3576 | } |
| 3577 | EXPORT_SYMBOL_GPL(iscsi_conn_get_param); |
| 3578 | |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3579 | int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, |
| 3580 | char *buf) |
| 3581 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3582 | struct iscsi_host *ihost = shost_priv(shost); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3583 | int len; |
| 3584 | |
| 3585 | switch (param) { |
Mike Christie | d8196ed | 2007-05-30 12:57:25 -0500 | [diff] [blame] | 3586 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3587 | len = sprintf(buf, "%s\n", ihost->netdev); |
Mike Christie | d8196ed | 2007-05-30 12:57:25 -0500 | [diff] [blame] | 3588 | break; |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3589 | case ISCSI_HOST_PARAM_HWADDRESS: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3590 | len = sprintf(buf, "%s\n", ihost->hwaddress); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3591 | break; |
Mike Christie | 8ad5781 | 2007-05-30 12:57:13 -0500 | [diff] [blame] | 3592 | case ISCSI_HOST_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3593 | len = sprintf(buf, "%s\n", ihost->initiatorname); |
Mike Christie | 8ad5781 | 2007-05-30 12:57:13 -0500 | [diff] [blame] | 3594 | break; |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3595 | default: |
| 3596 | return -ENOSYS; |
| 3597 | } |
| 3598 | |
| 3599 | return len; |
| 3600 | } |
| 3601 | EXPORT_SYMBOL_GPL(iscsi_host_get_param); |
| 3602 | |
| 3603 | int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param, |
| 3604 | char *buf, int buflen) |
| 3605 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3606 | struct iscsi_host *ihost = shost_priv(shost); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3607 | |
| 3608 | switch (param) { |
Mike Christie | d8196ed | 2007-05-30 12:57:25 -0500 | [diff] [blame] | 3609 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3610 | return iscsi_switch_str_param(&ihost->netdev, buf); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3611 | case ISCSI_HOST_PARAM_HWADDRESS: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3612 | return iscsi_switch_str_param(&ihost->hwaddress, buf); |
Mike Christie | 8ad5781 | 2007-05-30 12:57:13 -0500 | [diff] [blame] | 3613 | case ISCSI_HOST_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3614 | return iscsi_switch_str_param(&ihost->initiatorname, buf); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3615 | default: |
| 3616 | return -ENOSYS; |
| 3617 | } |
| 3618 | |
| 3619 | return 0; |
| 3620 | } |
| 3621 | EXPORT_SYMBOL_GPL(iscsi_host_set_param); |
| 3622 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3623 | MODULE_AUTHOR("Mike Christie"); |
| 3624 | MODULE_DESCRIPTION("iSCSI library functions"); |
| 3625 | MODULE_LICENSE("GPL"); |