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 | } |
Sagi Grimberg | 55e51ed | 2014-03-05 19:43:49 +0200 | [diff] [blame] | 390 | |
| 391 | if (scsi_get_prot_op(sc) != SCSI_PROT_NORMAL) |
| 392 | task->protected = true; |
| 393 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 394 | if (sc->sc_data_direction == DMA_TO_DEVICE) { |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 395 | unsigned out_len = scsi_out(sc)->length; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 396 | struct iscsi_r2t_info *r2t = &task->unsol_r2t; |
| 397 | |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 398 | hdr->data_length = cpu_to_be32(out_len); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 399 | hdr->flags |= ISCSI_FLAG_CMD_WRITE; |
| 400 | /* |
| 401 | * Write counters: |
| 402 | * |
| 403 | * imm_count bytes to be sent right after |
| 404 | * SCSI PDU Header |
| 405 | * |
| 406 | * unsol_count bytes(as Data-Out) to be sent |
| 407 | * without R2T ack right after |
| 408 | * immediate data |
| 409 | * |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 410 | * r2t data_length bytes to be sent via R2T ack's |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 411 | * |
| 412 | * pad_count bytes to be sent as zero-padding |
| 413 | */ |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 414 | memset(r2t, 0, sizeof(*r2t)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 415 | |
| 416 | if (session->imm_data_en) { |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 417 | if (out_len >= session->first_burst) |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 418 | task->imm_count = min(session->first_burst, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 419 | conn->max_xmit_dlength); |
| 420 | else |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 421 | task->imm_count = min(out_len, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 422 | conn->max_xmit_dlength); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 423 | hton24(hdr->dlength, task->imm_count); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 424 | } else |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 425 | zero_data(hdr->dlength); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 426 | |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 427 | if (!session->initial_r2t_en) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 428 | r2t->data_length = min(session->first_burst, out_len) - |
| 429 | task->imm_count; |
| 430 | r2t->data_offset = task->imm_count; |
| 431 | r2t->ttt = cpu_to_be32(ISCSI_RESERVED_TAG); |
| 432 | r2t->exp_statsn = cpu_to_be32(conn->exp_statsn); |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 433 | } |
| 434 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 435 | if (!task->unsol_r2t.data_length) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 436 | /* No unsolicit Data-Out's */ |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 437 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 438 | } else { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 439 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
| 440 | zero_data(hdr->dlength); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 441 | hdr->data_length = cpu_to_be32(scsi_in(sc)->length); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 442 | |
| 443 | if (sc->sc_data_direction == DMA_FROM_DEVICE) |
| 444 | hdr->flags |= ISCSI_FLAG_CMD_READ; |
| 445 | } |
| 446 | |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 447 | /* calculate size of additional header segments (AHSs) */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 448 | hdrlength = task->hdr_len - sizeof(*hdr); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 449 | |
| 450 | WARN_ON(hdrlength & (ISCSI_PAD_LEN-1)); |
| 451 | hdrlength /= ISCSI_PAD_LEN; |
| 452 | |
| 453 | WARN_ON(hdrlength >= 256); |
| 454 | hdr->hlength = hdrlength & 0xFF; |
Mike Christie | 96b1f96 | 2010-04-24 16:21:19 -0500 | [diff] [blame] | 455 | hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 456 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 457 | if (session->tt->init_task && session->tt->init_task(task)) |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 458 | return -EIO; |
| 459 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 460 | task->state = ISCSI_TASK_RUNNING; |
Mike Christie | d3305f3 | 2009-08-20 15:10:58 -0500 | [diff] [blame] | 461 | session->cmdsn++; |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 462 | |
Olaf Kirch | a8ac631 | 2007-12-13 12:43:35 -0600 | [diff] [blame] | 463 | conn->scsicmd_pdus_cnt++; |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 464 | ISCSI_DBG_SESSION(session, "iscsi prep [%s cid %d sc %p cdb 0x%x " |
| 465 | "itt 0x%x len %d bidi_len %d cmdsn %d win %d]\n", |
| 466 | scsi_bidi_cmnd(sc) ? "bidirectional" : |
| 467 | sc->sc_data_direction == DMA_TO_DEVICE ? |
| 468 | "write" : "read", conn->id, sc, sc->cmnd[0], |
| 469 | task->itt, scsi_bufflen(sc), |
| 470 | scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0, |
| 471 | session->cmdsn, |
| 472 | session->max_cmdsn - session->exp_cmdsn + 1); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 473 | return 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 474 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 475 | |
| 476 | /** |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 477 | * iscsi_free_task - free a task |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 478 | * @task: iscsi cmd task |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 479 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 480 | * Must be called with session back_lock. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 481 | * This function returns the scsi command to scsi-ml or cleans |
| 482 | * up mgmt tasks then returns the task to the pool. |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 483 | */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 484 | static void iscsi_free_task(struct iscsi_task *task) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 485 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 486 | struct iscsi_conn *conn = task->conn; |
Mike Christie | c1635cb | 2007-12-13 12:43:33 -0600 | [diff] [blame] | 487 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 488 | struct scsi_cmnd *sc = task->sc; |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 489 | int oldstate = task->state; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 490 | |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 491 | ISCSI_DBG_SESSION(session, "freeing task itt 0x%x state %d sc %p\n", |
| 492 | task->itt, task->state, task->sc); |
| 493 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 494 | session->tt->cleanup_task(task); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 495 | task->state = ISCSI_TASK_FREE; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 496 | task->sc = NULL; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 497 | /* |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 498 | * login task is preallocated so do not free |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 499 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 500 | if (conn->login_task == task) |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 501 | return; |
| 502 | |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 503 | kfifo_in(&session->cmdpool.queue, (void*)&task, sizeof(void*)); |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 504 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 505 | if (sc) { |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 506 | /* SCSI eh reuses commands to verify us */ |
| 507 | sc->SCp.ptr = NULL; |
| 508 | /* |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 509 | * queue command may call this to free the task, so |
| 510 | * it will decide how to return sc to scsi-ml. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 511 | */ |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 512 | if (oldstate != ISCSI_TASK_REQUEUE_SCSIQ) |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 513 | sc->scsi_done(sc); |
| 514 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 515 | } |
| 516 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 517 | void __iscsi_get_task(struct iscsi_task *task) |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 518 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 519 | atomic_inc(&task->refcount); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 520 | } |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 521 | EXPORT_SYMBOL_GPL(__iscsi_get_task); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 522 | |
Eddie Wai | 8eea2f5 | 2010-11-23 15:29:21 -0800 | [diff] [blame] | 523 | void __iscsi_put_task(struct iscsi_task *task) |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 524 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 525 | if (atomic_dec_and_test(&task->refcount)) |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 526 | iscsi_free_task(task); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 527 | } |
Eddie Wai | 8eea2f5 | 2010-11-23 15:29:21 -0800 | [diff] [blame] | 528 | EXPORT_SYMBOL_GPL(__iscsi_put_task); |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 529 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 530 | void iscsi_put_task(struct iscsi_task *task) |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 531 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 532 | struct iscsi_session *session = task->conn->session; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 533 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 534 | /* regular RX path uses back_lock */ |
| 535 | spin_lock_bh(&session->back_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 536 | __iscsi_put_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 537 | spin_unlock_bh(&session->back_lock); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 538 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 539 | EXPORT_SYMBOL_GPL(iscsi_put_task); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 540 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 541 | /** |
| 542 | * iscsi_complete_task - finish a task |
| 543 | * @task: iscsi cmd task |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 544 | * @state: state to complete task with |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 545 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 546 | * Must be called with session back_lock. |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 547 | */ |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 548 | static void iscsi_complete_task(struct iscsi_task *task, int state) |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 549 | { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 550 | struct iscsi_conn *conn = task->conn; |
| 551 | |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 552 | ISCSI_DBG_SESSION(conn->session, |
| 553 | "complete task itt 0x%x state %d sc %p\n", |
| 554 | task->itt, task->state, task->sc); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 555 | if (task->state == ISCSI_TASK_COMPLETED || |
| 556 | task->state == ISCSI_TASK_ABRT_TMF || |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 557 | task->state == ISCSI_TASK_ABRT_SESS_RECOV || |
| 558 | task->state == ISCSI_TASK_REQUEUE_SCSIQ) |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 559 | return; |
| 560 | WARN_ON_ONCE(task->state == ISCSI_TASK_FREE); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 561 | task->state = state; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 562 | |
| 563 | if (!list_empty(&task->running)) |
| 564 | list_del_init(&task->running); |
| 565 | |
| 566 | if (conn->task == task) |
| 567 | conn->task = NULL; |
| 568 | |
| 569 | if (conn->ping_task == task) |
| 570 | conn->ping_task = NULL; |
| 571 | |
| 572 | /* release get from queueing */ |
| 573 | __iscsi_put_task(task); |
| 574 | } |
| 575 | |
Mike Christie | 4c0ba5d | 2009-09-05 07:34:23 +0530 | [diff] [blame] | 576 | /** |
| 577 | * iscsi_complete_scsi_task - finish scsi task normally |
| 578 | * @task: iscsi task for scsi cmd |
| 579 | * @exp_cmdsn: expected cmd sn in cpu format |
| 580 | * @max_cmdsn: max cmd sn in cpu format |
| 581 | * |
| 582 | * This is used when drivers do not need or cannot perform |
| 583 | * lower level pdu processing. |
| 584 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 585 | * Called with session back_lock |
Mike Christie | 4c0ba5d | 2009-09-05 07:34:23 +0530 | [diff] [blame] | 586 | */ |
| 587 | void iscsi_complete_scsi_task(struct iscsi_task *task, |
| 588 | uint32_t exp_cmdsn, uint32_t max_cmdsn) |
| 589 | { |
| 590 | struct iscsi_conn *conn = task->conn; |
| 591 | |
| 592 | ISCSI_DBG_SESSION(conn->session, "[itt 0x%x]\n", task->itt); |
| 593 | |
| 594 | conn->last_recv = jiffies; |
| 595 | __iscsi_update_cmdsn(conn->session, exp_cmdsn, max_cmdsn); |
| 596 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
| 597 | } |
| 598 | EXPORT_SYMBOL_GPL(iscsi_complete_scsi_task); |
| 599 | |
| 600 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 601 | /* |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 602 | * 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] | 603 | * still pending or from the xmit thread, then xmit thread must |
| 604 | * be suspended. |
| 605 | */ |
| 606 | static void fail_scsi_task(struct iscsi_task *task, int err) |
| 607 | { |
| 608 | struct iscsi_conn *conn = task->conn; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 609 | struct scsi_cmnd *sc; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 610 | int state; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 611 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 612 | /* |
| 613 | * if a command completes and we get a successful tmf response |
| 614 | * we will hit this because the scsi eh abort code does not take |
| 615 | * a ref to the task. |
| 616 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 617 | sc = task->sc; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 618 | if (!sc) |
| 619 | return; |
| 620 | |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 621 | if (task->state == ISCSI_TASK_PENDING) { |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 622 | /* |
| 623 | * cmd never made it to the xmit thread, so we should not count |
| 624 | * the cmd in the sequencing |
| 625 | */ |
| 626 | conn->session->queued_cmdsn--; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 627 | /* it was never sent so just complete like normal */ |
| 628 | state = ISCSI_TASK_COMPLETED; |
| 629 | } else if (err == DID_TRANSPORT_DISRUPTED) |
| 630 | state = ISCSI_TASK_ABRT_SESS_RECOV; |
| 631 | else |
| 632 | state = ISCSI_TASK_ABRT_TMF; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 633 | |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 634 | sc->result = err << 16; |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 635 | if (!scsi_bidi_cmnd(sc)) |
| 636 | scsi_set_resid(sc, scsi_bufflen(sc)); |
| 637 | else { |
| 638 | scsi_out(sc)->resid = scsi_out(sc)->length; |
| 639 | scsi_in(sc)->resid = scsi_in(sc)->length; |
| 640 | } |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 641 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 642 | /* regular RX path uses back_lock */ |
| 643 | spin_lock_bh(&conn->session->back_lock); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 644 | iscsi_complete_task(task, state); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 645 | spin_unlock_bh(&conn->session->back_lock); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 646 | } |
| 647 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 648 | static int iscsi_prep_mgmt_task(struct iscsi_conn *conn, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 649 | struct iscsi_task *task) |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 650 | { |
| 651 | struct iscsi_session *session = conn->session; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 652 | struct iscsi_hdr *hdr = task->hdr; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 653 | struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr; |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 654 | uint8_t opcode = hdr->opcode & ISCSI_OPCODE_MASK; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 655 | |
| 656 | if (conn->session->state == ISCSI_STATE_LOGGING_OUT) |
| 657 | return -ENOTCONN; |
| 658 | |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 659 | if (opcode != ISCSI_OP_LOGIN && opcode != ISCSI_OP_TEXT) |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 660 | nop->exp_statsn = cpu_to_be32(conn->exp_statsn); |
| 661 | /* |
| 662 | * pre-format CmdSN for outgoing PDU. |
| 663 | */ |
| 664 | nop->cmdsn = cpu_to_be32(session->cmdsn); |
| 665 | if (hdr->itt != RESERVED_ITT) { |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 666 | /* |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 667 | * TODO: We always use immediate for normal session pdus. |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 668 | * If we start to send tmfs or nops as non-immediate then |
| 669 | * we should start checking the cmdsn numbers for mgmt tasks. |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 670 | * |
| 671 | * During discovery sessions iscsid sends TEXT as non immediate, |
| 672 | * but we always only send one PDU at a time. |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 673 | */ |
| 674 | if (conn->c_stage == ISCSI_CONN_STARTED && |
| 675 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
| 676 | session->queued_cmdsn++; |
| 677 | session->cmdsn++; |
| 678 | } |
| 679 | } |
| 680 | |
Mike Christie | ae15f80 | 2008-12-02 00:32:15 -0600 | [diff] [blame] | 681 | if (session->tt->init_task && session->tt->init_task(task)) |
| 682 | return -EIO; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 683 | |
| 684 | if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) |
| 685 | session->state = ISCSI_STATE_LOGGING_OUT; |
| 686 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 687 | task->state = ISCSI_TASK_RUNNING; |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 688 | ISCSI_DBG_SESSION(session, "mgmtpdu [op 0x%x hdr->itt 0x%x " |
| 689 | "datalen %d]\n", hdr->opcode & ISCSI_OPCODE_MASK, |
| 690 | hdr->itt, task->data_count); |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 691 | return 0; |
| 692 | } |
| 693 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 694 | static struct iscsi_task * |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 695 | __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 696 | char *data, uint32_t data_size) |
| 697 | { |
| 698 | struct iscsi_session *session = conn->session; |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 699 | struct iscsi_host *ihost = shost_priv(session->host); |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 700 | uint8_t opcode = hdr->opcode & ISCSI_OPCODE_MASK; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 701 | struct iscsi_task *task; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 702 | itt_t itt; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 703 | |
| 704 | if (session->state == ISCSI_STATE_TERMINATE) |
| 705 | return NULL; |
| 706 | |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 707 | if (opcode == ISCSI_OP_LOGIN || opcode == ISCSI_OP_TEXT) { |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 708 | /* |
| 709 | * Login and Text are sent serially, in |
| 710 | * request-followed-by-response sequence. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 711 | * Same task can be used. Same ITT must be used. |
| 712 | * Note that login_task is preallocated at conn_create(). |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 713 | */ |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 714 | if (conn->login_task->state != ISCSI_TASK_FREE) { |
| 715 | iscsi_conn_printk(KERN_ERR, conn, "Login/Text in " |
| 716 | "progress. Cannot start new task.\n"); |
| 717 | return NULL; |
| 718 | } |
| 719 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 720 | task = conn->login_task; |
Mike Christie | 4f704dc | 2009-11-11 16:34:31 -0600 | [diff] [blame] | 721 | } else { |
Mike Christie | 26013ad | 2009-05-13 17:57:43 -0500 | [diff] [blame] | 722 | if (session->state != ISCSI_STATE_LOGGED_IN) |
| 723 | return NULL; |
| 724 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 725 | BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE); |
| 726 | BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED); |
| 727 | |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 728 | if (!kfifo_out(&session->cmdpool.queue, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 729 | (void*)&task, sizeof(void*))) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 730 | return NULL; |
| 731 | } |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 732 | /* |
| 733 | * released in complete pdu for task we expect a response for, and |
| 734 | * released by the lld when it has transmitted the task for |
| 735 | * pdus we do not expect a response for. |
| 736 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 737 | atomic_set(&task->refcount, 1); |
| 738 | task->conn = conn; |
| 739 | task->sc = NULL; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 740 | INIT_LIST_HEAD(&task->running); |
| 741 | task->state = ISCSI_TASK_PENDING; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 742 | |
| 743 | if (data_size) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 744 | memcpy(task->data, data, data_size); |
| 745 | task->data_count = data_size; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 746 | } else |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 747 | task->data_count = 0; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 748 | |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 749 | if (conn->session->tt->alloc_pdu) { |
| 750 | if (conn->session->tt->alloc_pdu(task, hdr->opcode)) { |
| 751 | iscsi_conn_printk(KERN_ERR, conn, "Could not allocate " |
| 752 | "pdu for mgmt task.\n"); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 753 | goto free_task; |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 754 | } |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 755 | } |
Mike Christie | 184b57c | 2009-05-13 17:57:39 -0500 | [diff] [blame] | 756 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 757 | itt = task->hdr->itt; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 758 | task->hdr_len = sizeof(struct iscsi_hdr); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 759 | memcpy(task->hdr, hdr, sizeof(struct iscsi_hdr)); |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 760 | |
| 761 | if (hdr->itt != RESERVED_ITT) { |
| 762 | if (session->tt->parse_pdu_itt) |
| 763 | task->hdr->itt = itt; |
| 764 | else |
| 765 | task->hdr->itt = build_itt(task->itt, |
| 766 | task->conn->session->age); |
| 767 | } |
| 768 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 769 | if (!ihost->workq) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 770 | if (iscsi_prep_mgmt_task(conn, task)) |
| 771 | goto free_task; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 772 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 773 | if (session->tt->xmit_task(task)) |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 774 | goto free_task; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 775 | } else { |
| 776 | list_add_tail(&task->running, &conn->mgmtqueue); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 777 | iscsi_conn_queue_work(conn); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 778 | } |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 779 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 780 | return task; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 781 | |
| 782 | free_task: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 783 | /* regular RX path uses back_lock */ |
| 784 | spin_lock_bh(&session->back_lock); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 785 | __iscsi_put_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 786 | spin_unlock_bh(&session->back_lock); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 787 | return NULL; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr, |
| 791 | char *data, uint32_t data_size) |
| 792 | { |
| 793 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 794 | struct iscsi_session *session = conn->session; |
| 795 | int err = 0; |
| 796 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 797 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 798 | if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size)) |
| 799 | err = -EPERM; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 800 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 801 | return err; |
| 802 | } |
| 803 | EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu); |
| 804 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 805 | /** |
| 806 | * iscsi_cmd_rsp - SCSI Command Response processing |
| 807 | * @conn: iscsi connection |
| 808 | * @hdr: iscsi header |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 809 | * @task: scsi command task |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 810 | * @data: cmd data buffer |
| 811 | * @datalen: len of buffer |
| 812 | * |
| 813 | * 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] | 814 | * then completes the command and task. |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 815 | **/ |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 816 | 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] | 817 | struct iscsi_task *task, char *data, |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 818 | int datalen) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 819 | { |
Nicholas Bellinger | 1235218 | 2011-05-27 11:16:33 +0000 | [diff] [blame] | 820 | struct iscsi_scsi_rsp *rhdr = (struct iscsi_scsi_rsp *)hdr; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 821 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 822 | struct scsi_cmnd *sc = task->sc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 823 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 824 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 825 | conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1; |
| 826 | |
| 827 | sc->result = (DID_OK << 16) | rhdr->cmd_status; |
| 828 | |
Sagi Grimberg | 55e51ed | 2014-03-05 19:43:49 +0200 | [diff] [blame] | 829 | if (task->protected) { |
| 830 | sector_t sector; |
| 831 | u8 ascq; |
| 832 | |
| 833 | /** |
| 834 | * Transports that didn't implement check_protection |
| 835 | * callback but still published T10-PI support to scsi-mid |
| 836 | * deserve this BUG_ON. |
| 837 | **/ |
| 838 | BUG_ON(!session->tt->check_protection); |
| 839 | |
| 840 | ascq = session->tt->check_protection(task, §or); |
| 841 | if (ascq) { |
| 842 | sc->result = DRIVER_SENSE << 24 | |
| 843 | SAM_STAT_CHECK_CONDITION; |
| 844 | scsi_build_sense_buffer(1, sc->sense_buffer, |
| 845 | ILLEGAL_REQUEST, 0x10, ascq); |
| 846 | sc->sense_buffer[7] = 0xc; /* Additional sense length */ |
| 847 | sc->sense_buffer[8] = 0; /* Information desc type */ |
| 848 | sc->sense_buffer[9] = 0xa; /* Additional desc length */ |
| 849 | sc->sense_buffer[10] = 0x80; /* Validity bit */ |
| 850 | |
| 851 | put_unaligned_be64(sector, &sc->sense_buffer[12]); |
| 852 | goto out; |
| 853 | } |
| 854 | } |
| 855 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 856 | if (rhdr->response != ISCSI_STATUS_CMD_COMPLETED) { |
| 857 | sc->result = DID_ERROR << 16; |
| 858 | goto out; |
| 859 | } |
| 860 | |
| 861 | if (rhdr->cmd_status == SAM_STAT_CHECK_CONDITION) { |
Mike Christie | 9b80cb4 | 2006-12-17 12:10:28 -0600 | [diff] [blame] | 862 | uint16_t senselen; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 863 | |
| 864 | if (datalen < 2) { |
| 865 | invalid_datalen: |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 866 | iscsi_conn_printk(KERN_ERR, conn, |
| 867 | "Got CHECK_CONDITION but invalid data " |
| 868 | "buffer size of %d\n", datalen); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 869 | sc->result = DID_BAD_TARGET << 16; |
| 870 | goto out; |
| 871 | } |
| 872 | |
Harvey Harrison | 8f333991 | 2008-05-21 15:54:20 -0500 | [diff] [blame] | 873 | senselen = get_unaligned_be16(data); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 874 | if (datalen < senselen) |
| 875 | goto invalid_datalen; |
| 876 | |
| 877 | memcpy(sc->sense_buffer, data + 2, |
Mike Christie | 9b80cb4 | 2006-12-17 12:10:28 -0600 | [diff] [blame] | 878 | min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE)); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 879 | ISCSI_DBG_SESSION(session, "copied %d bytes of sense\n", |
| 880 | min_t(uint16_t, senselen, |
| 881 | SCSI_SENSE_BUFFERSIZE)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 882 | } |
| 883 | |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 884 | if (rhdr->flags & (ISCSI_FLAG_CMD_BIDI_UNDERFLOW | |
| 885 | ISCSI_FLAG_CMD_BIDI_OVERFLOW)) { |
| 886 | int res_count = be32_to_cpu(rhdr->bi_residual_count); |
| 887 | |
| 888 | if (scsi_bidi_cmnd(sc) && res_count > 0 && |
| 889 | (rhdr->flags & ISCSI_FLAG_CMD_BIDI_OVERFLOW || |
| 890 | res_count <= scsi_in(sc)->length)) |
| 891 | scsi_in(sc)->resid = res_count; |
| 892 | else |
| 893 | sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; |
| 894 | } |
| 895 | |
Boaz Harrosh | 7207fea | 2007-12-13 12:43:22 -0600 | [diff] [blame] | 896 | if (rhdr->flags & (ISCSI_FLAG_CMD_UNDERFLOW | |
| 897 | ISCSI_FLAG_CMD_OVERFLOW)) { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 898 | int res_count = be32_to_cpu(rhdr->residual_count); |
| 899 | |
Boaz Harrosh | 7207fea | 2007-12-13 12:43:22 -0600 | [diff] [blame] | 900 | if (res_count > 0 && |
| 901 | (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW || |
| 902 | res_count <= scsi_bufflen(sc))) |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 903 | /* write side for bidi or uni-io set_resid */ |
FUJITA Tomonori | 1c13899 | 2007-06-14 22:13:17 +0900 | [diff] [blame] | 904 | scsi_set_resid(sc, res_count); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 905 | else |
| 906 | sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 907 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 908 | out: |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 909 | 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] | 910 | sc, sc->result, task->itt); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 911 | conn->scsirsp_pdus_cnt++; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 912 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 913 | } |
| 914 | |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 915 | /** |
| 916 | * iscsi_data_in_rsp - SCSI Data-In Response processing |
| 917 | * @conn: iscsi connection |
| 918 | * @hdr: iscsi pdu |
| 919 | * @task: scsi command task |
| 920 | **/ |
| 921 | static void |
| 922 | iscsi_data_in_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 923 | struct iscsi_task *task) |
| 924 | { |
| 925 | struct iscsi_data_rsp *rhdr = (struct iscsi_data_rsp *)hdr; |
| 926 | struct scsi_cmnd *sc = task->sc; |
| 927 | |
| 928 | if (!(rhdr->flags & ISCSI_FLAG_DATA_STATUS)) |
| 929 | return; |
| 930 | |
Mike Christie | edbc9aa05 | 2009-05-13 17:57:42 -0500 | [diff] [blame] | 931 | iscsi_update_cmdsn(conn->session, (struct iscsi_nopin *)hdr); |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 932 | sc->result = (DID_OK << 16) | rhdr->cmd_status; |
| 933 | conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1; |
| 934 | if (rhdr->flags & (ISCSI_FLAG_DATA_UNDERFLOW | |
| 935 | ISCSI_FLAG_DATA_OVERFLOW)) { |
| 936 | int res_count = be32_to_cpu(rhdr->residual_count); |
| 937 | |
| 938 | if (res_count > 0 && |
| 939 | (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW || |
| 940 | res_count <= scsi_in(sc)->length)) |
| 941 | scsi_in(sc)->resid = res_count; |
| 942 | else |
| 943 | sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; |
| 944 | } |
| 945 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 946 | ISCSI_DBG_SESSION(conn->session, "data in with status done " |
| 947 | "[sc %p res %d itt 0x%x]\n", |
| 948 | sc, sc->result, task->itt); |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 949 | conn->scsirsp_pdus_cnt++; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 950 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 951 | } |
| 952 | |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 953 | static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr) |
| 954 | { |
| 955 | struct iscsi_tm_rsp *tmf = (struct iscsi_tm_rsp *)hdr; |
| 956 | |
| 957 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
| 958 | conn->tmfrsp_pdus_cnt++; |
| 959 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 960 | if (conn->tmf_state != TMF_QUEUED) |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 961 | return; |
| 962 | |
| 963 | if (tmf->response == ISCSI_TMF_RSP_COMPLETE) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 964 | conn->tmf_state = TMF_SUCCESS; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 965 | else if (tmf->response == ISCSI_TMF_RSP_NO_TASK) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 966 | conn->tmf_state = TMF_NOT_FOUND; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 967 | else |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 968 | conn->tmf_state = TMF_FAILED; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 969 | wake_up(&conn->ehwait); |
| 970 | } |
| 971 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 972 | static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr) |
| 973 | { |
| 974 | struct iscsi_nopout hdr; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 975 | struct iscsi_task *task; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 976 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 977 | if (!rhdr && conn->ping_task) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 978 | return; |
| 979 | |
| 980 | memset(&hdr, 0, sizeof(struct iscsi_nopout)); |
| 981 | hdr.opcode = ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE; |
| 982 | hdr.flags = ISCSI_FLAG_CMD_FINAL; |
| 983 | |
| 984 | if (rhdr) { |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 985 | hdr.lun = rhdr->lun; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 986 | hdr.ttt = rhdr->ttt; |
| 987 | hdr.itt = RESERVED_ITT; |
| 988 | } else |
| 989 | hdr.ttt = RESERVED_ITT; |
| 990 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 991 | task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0); |
| 992 | if (!task) |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 993 | iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n"); |
Mike Christie | d3acf02 | 2008-12-01 12:13:00 -0600 | [diff] [blame] | 994 | else if (!rhdr) { |
| 995 | /* only track our nops */ |
| 996 | conn->ping_task = task; |
| 997 | conn->last_ping = jiffies; |
| 998 | } |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 999 | } |
| 1000 | |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1001 | static int iscsi_nop_out_rsp(struct iscsi_task *task, |
| 1002 | struct iscsi_nopin *nop, char *data, int datalen) |
| 1003 | { |
| 1004 | struct iscsi_conn *conn = task->conn; |
| 1005 | int rc = 0; |
| 1006 | |
| 1007 | if (conn->ping_task != task) { |
| 1008 | /* |
| 1009 | * If this is not in response to one of our |
| 1010 | * nops then it must be from userspace. |
| 1011 | */ |
| 1012 | if (iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *)nop, |
| 1013 | data, datalen)) |
| 1014 | rc = ISCSI_ERR_CONN_FAILED; |
| 1015 | } else |
| 1016 | mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout); |
| 1017 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
| 1018 | return rc; |
| 1019 | } |
| 1020 | |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1021 | static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 1022 | char *data, int datalen) |
| 1023 | { |
| 1024 | struct iscsi_reject *reject = (struct iscsi_reject *)hdr; |
| 1025 | struct iscsi_hdr rejected_pdu; |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1026 | int opcode, rc = 0; |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1027 | |
| 1028 | conn->exp_statsn = be32_to_cpu(reject->statsn) + 1; |
| 1029 | |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1030 | if (ntoh24(reject->dlength) > datalen || |
| 1031 | ntoh24(reject->dlength) < sizeof(struct iscsi_hdr)) { |
| 1032 | iscsi_conn_printk(KERN_ERR, conn, "Cannot handle rejected " |
| 1033 | "pdu. Invalid data length (pdu dlength " |
| 1034 | "%u, datalen %d\n", ntoh24(reject->dlength), |
| 1035 | datalen); |
| 1036 | return ISCSI_ERR_PROTO; |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1037 | } |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1038 | memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr)); |
| 1039 | opcode = rejected_pdu.opcode & ISCSI_OPCODE_MASK; |
| 1040 | |
| 1041 | switch (reject->reason) { |
| 1042 | case ISCSI_REASON_DATA_DIGEST_ERROR: |
| 1043 | iscsi_conn_printk(KERN_ERR, conn, |
| 1044 | "pdu (op 0x%x itt 0x%x) rejected " |
| 1045 | "due to DataDigest error.\n", |
Vaughan Cao | e5dbbe2 | 2014-01-09 10:21:34 +0800 | [diff] [blame] | 1046 | opcode, rejected_pdu.itt); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1047 | break; |
| 1048 | case ISCSI_REASON_IMM_CMD_REJECT: |
| 1049 | iscsi_conn_printk(KERN_ERR, conn, |
| 1050 | "pdu (op 0x%x itt 0x%x) rejected. Too many " |
| 1051 | "immediate commands.\n", |
Vaughan Cao | e5dbbe2 | 2014-01-09 10:21:34 +0800 | [diff] [blame] | 1052 | opcode, rejected_pdu.itt); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1053 | /* |
| 1054 | * We only send one TMF at a time so if the target could not |
| 1055 | * handle it, then it should get fixed (RFC mandates that |
| 1056 | * a target can handle one immediate TMF per conn). |
| 1057 | * |
| 1058 | * For nops-outs, we could have sent more than one if |
| 1059 | * the target is sending us lots of nop-ins |
| 1060 | */ |
| 1061 | if (opcode != ISCSI_OP_NOOP_OUT) |
| 1062 | return 0; |
| 1063 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1064 | if (rejected_pdu.itt == cpu_to_be32(ISCSI_RESERVED_TAG)) { |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1065 | /* |
| 1066 | * nop-out in response to target's nop-out rejected. |
| 1067 | * Just resend. |
| 1068 | */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1069 | /* In RX path we are under back lock */ |
| 1070 | spin_unlock(&conn->session->back_lock); |
| 1071 | spin_lock(&conn->session->frwd_lock); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1072 | iscsi_send_nopout(conn, |
| 1073 | (struct iscsi_nopin*)&rejected_pdu); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1074 | spin_unlock(&conn->session->frwd_lock); |
| 1075 | spin_lock(&conn->session->back_lock); |
| 1076 | } else { |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1077 | struct iscsi_task *task; |
| 1078 | /* |
| 1079 | * Our nop as ping got dropped. We know the target |
| 1080 | * and transport are ok so just clean up |
| 1081 | */ |
| 1082 | task = iscsi_itt_to_task(conn, rejected_pdu.itt); |
| 1083 | if (!task) { |
| 1084 | iscsi_conn_printk(KERN_ERR, conn, |
| 1085 | "Invalid pdu reject. Could " |
| 1086 | "not lookup rejected task.\n"); |
| 1087 | rc = ISCSI_ERR_BAD_ITT; |
| 1088 | } else |
| 1089 | rc = iscsi_nop_out_rsp(task, |
| 1090 | (struct iscsi_nopin*)&rejected_pdu, |
| 1091 | NULL, 0); |
| 1092 | } |
| 1093 | break; |
| 1094 | default: |
| 1095 | iscsi_conn_printk(KERN_ERR, conn, |
| 1096 | "pdu (op 0x%x itt 0x%x) rejected. Reason " |
Vaughan Cao | e5dbbe2 | 2014-01-09 10:21:34 +0800 | [diff] [blame] | 1097 | "code 0x%x\n", rejected_pdu.opcode, |
| 1098 | rejected_pdu.itt, reject->reason); |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1099 | break; |
| 1100 | } |
| 1101 | return rc; |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1102 | } |
| 1103 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1104 | /** |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1105 | * iscsi_itt_to_task - look up task by itt |
| 1106 | * @conn: iscsi connection |
| 1107 | * @itt: itt |
| 1108 | * |
| 1109 | * This should be used for mgmt tasks like login and nops, or if |
| 1110 | * the LDD's itt space does not include the session age. |
| 1111 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1112 | * The session back_lock must be held. |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1113 | */ |
Mike Christie | 8f9256c | 2009-05-13 17:57:41 -0500 | [diff] [blame] | 1114 | 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] | 1115 | { |
| 1116 | struct iscsi_session *session = conn->session; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1117 | int i; |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1118 | |
| 1119 | if (itt == RESERVED_ITT) |
| 1120 | return NULL; |
| 1121 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1122 | if (session->tt->parse_pdu_itt) |
| 1123 | session->tt->parse_pdu_itt(conn, itt, &i, NULL); |
| 1124 | else |
| 1125 | i = get_itt(itt); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1126 | if (i >= session->cmds_max) |
| 1127 | return NULL; |
| 1128 | |
| 1129 | return session->cmds[i]; |
| 1130 | } |
Mike Christie | 8f9256c | 2009-05-13 17:57:41 -0500 | [diff] [blame] | 1131 | EXPORT_SYMBOL_GPL(iscsi_itt_to_task); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1132 | |
| 1133 | /** |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1134 | * __iscsi_complete_pdu - complete pdu |
| 1135 | * @conn: iscsi conn |
| 1136 | * @hdr: iscsi header |
| 1137 | * @data: data buffer |
| 1138 | * @datalen: len of data buffer |
| 1139 | * |
| 1140 | * Completes pdu processing by freeing any resources allocated at |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1141 | * queuecommand or send generic. session back_lock must be held and verify |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1142 | * itt must have been called. |
| 1143 | */ |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1144 | int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 1145 | char *data, int datalen) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1146 | { |
| 1147 | struct iscsi_session *session = conn->session; |
| 1148 | int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1149 | struct iscsi_task *task; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1150 | uint32_t itt; |
| 1151 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1152 | conn->last_recv = jiffies; |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1153 | rc = iscsi_verify_itt(conn, hdr->itt); |
| 1154 | if (rc) |
| 1155 | return rc; |
| 1156 | |
Al Viro | b437735 | 2007-02-09 16:39:40 +0000 | [diff] [blame] | 1157 | if (hdr->itt != RESERVED_ITT) |
| 1158 | itt = get_itt(hdr->itt); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1159 | else |
Al Viro | b437735 | 2007-02-09 16:39:40 +0000 | [diff] [blame] | 1160 | itt = ~0U; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1161 | |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1162 | ISCSI_DBG_SESSION(session, "[op 0x%x cid %d itt 0x%x len %d]\n", |
| 1163 | opcode, conn->id, itt, datalen); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1164 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1165 | if (itt == ~0U) { |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1166 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1167 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1168 | switch(opcode) { |
| 1169 | case ISCSI_OP_NOOP_IN: |
Mike Christie | 40527af | 2006-07-24 15:47:45 -0500 | [diff] [blame] | 1170 | if (datalen) { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1171 | rc = ISCSI_ERR_PROTO; |
Mike Christie | 40527af | 2006-07-24 15:47:45 -0500 | [diff] [blame] | 1172 | break; |
| 1173 | } |
| 1174 | |
Al Viro | b437735 | 2007-02-09 16:39:40 +0000 | [diff] [blame] | 1175 | if (hdr->ttt == cpu_to_be32(ISCSI_RESERVED_TAG)) |
Mike Christie | 40527af | 2006-07-24 15:47:45 -0500 | [diff] [blame] | 1176 | break; |
| 1177 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1178 | /* In RX path we are under back lock */ |
| 1179 | spin_unlock(&session->back_lock); |
| 1180 | spin_lock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1181 | iscsi_send_nopout(conn, (struct iscsi_nopin*)hdr); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1182 | spin_unlock(&session->frwd_lock); |
| 1183 | spin_lock(&session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1184 | break; |
| 1185 | case ISCSI_OP_REJECT: |
Mike Christie | 62f3830 | 2006-08-31 18:09:27 -0400 | [diff] [blame] | 1186 | rc = iscsi_handle_reject(conn, hdr, data, datalen); |
| 1187 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1188 | case ISCSI_OP_ASYNC_EVENT: |
Mike Christie | 8d2860b | 2006-05-02 19:46:47 -0500 | [diff] [blame] | 1189 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
Mike Christie | 5831c73 | 2006-10-16 18:09:41 -0400 | [diff] [blame] | 1190 | if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) |
| 1191 | rc = ISCSI_ERR_CONN_FAILED; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1192 | break; |
| 1193 | default: |
| 1194 | rc = ISCSI_ERR_BAD_OPCODE; |
| 1195 | break; |
| 1196 | } |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1197 | goto out; |
| 1198 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1199 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1200 | switch(opcode) { |
| 1201 | case ISCSI_OP_SCSI_CMD_RSP: |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1202 | case ISCSI_OP_SCSI_DATA_IN: |
| 1203 | task = iscsi_itt_to_ctask(conn, hdr->itt); |
| 1204 | if (!task) |
| 1205 | return ISCSI_ERR_BAD_ITT; |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1206 | task->last_xfer = jiffies; |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1207 | break; |
| 1208 | case ISCSI_OP_R2T: |
| 1209 | /* |
| 1210 | * LLD handles R2Ts if they need to. |
| 1211 | */ |
| 1212 | return 0; |
| 1213 | case ISCSI_OP_LOGOUT_RSP: |
| 1214 | case ISCSI_OP_LOGIN_RSP: |
| 1215 | case ISCSI_OP_TEXT_RSP: |
| 1216 | case ISCSI_OP_SCSI_TMFUNC_RSP: |
| 1217 | case ISCSI_OP_NOOP_IN: |
| 1218 | task = iscsi_itt_to_task(conn, hdr->itt); |
| 1219 | if (!task) |
| 1220 | return ISCSI_ERR_BAD_ITT; |
| 1221 | break; |
| 1222 | default: |
| 1223 | return ISCSI_ERR_BAD_OPCODE; |
| 1224 | } |
| 1225 | |
| 1226 | switch(opcode) { |
| 1227 | case ISCSI_OP_SCSI_CMD_RSP: |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1228 | iscsi_scsi_cmd_rsp(conn, hdr, task, data, datalen); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1229 | break; |
| 1230 | case ISCSI_OP_SCSI_DATA_IN: |
Mike Christie | 1d9edf0 | 2008-09-24 11:46:09 -0500 | [diff] [blame] | 1231 | iscsi_data_in_rsp(conn, hdr, task); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1232 | break; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1233 | case ISCSI_OP_LOGOUT_RSP: |
| 1234 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1235 | if (datalen) { |
| 1236 | rc = ISCSI_ERR_PROTO; |
| 1237 | break; |
| 1238 | } |
| 1239 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
| 1240 | goto recv_pdu; |
| 1241 | case ISCSI_OP_LOGIN_RSP: |
| 1242 | case ISCSI_OP_TEXT_RSP: |
| 1243 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1244 | /* |
| 1245 | * login related PDU's exp_statsn is handled in |
| 1246 | * userspace |
| 1247 | */ |
| 1248 | goto recv_pdu; |
| 1249 | case ISCSI_OP_SCSI_TMFUNC_RSP: |
| 1250 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1251 | if (datalen) { |
| 1252 | rc = ISCSI_ERR_PROTO; |
| 1253 | break; |
| 1254 | } |
| 1255 | |
| 1256 | iscsi_tmf_rsp(conn, hdr); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1257 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1258 | break; |
| 1259 | case ISCSI_OP_NOOP_IN: |
| 1260 | iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr); |
| 1261 | if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) { |
| 1262 | rc = ISCSI_ERR_PROTO; |
| 1263 | break; |
| 1264 | } |
| 1265 | conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1; |
| 1266 | |
Mike Christie | 8afa143 | 2009-08-20 15:10:59 -0500 | [diff] [blame] | 1267 | rc = iscsi_nop_out_rsp(task, (struct iscsi_nopin*)hdr, |
| 1268 | data, datalen); |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1269 | break; |
| 1270 | default: |
| 1271 | rc = ISCSI_ERR_BAD_OPCODE; |
| 1272 | break; |
| 1273 | } |
| 1274 | |
| 1275 | out: |
| 1276 | return rc; |
| 1277 | recv_pdu: |
| 1278 | if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen)) |
| 1279 | rc = ISCSI_ERR_CONN_FAILED; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1280 | iscsi_complete_task(task, ISCSI_TASK_COMPLETED); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1281 | return rc; |
| 1282 | } |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1283 | EXPORT_SYMBOL_GPL(__iscsi_complete_pdu); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1284 | |
| 1285 | int iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, |
| 1286 | char *data, int datalen) |
| 1287 | { |
| 1288 | int rc; |
| 1289 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1290 | spin_lock(&conn->session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1291 | rc = __iscsi_complete_pdu(conn, hdr, data, datalen); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1292 | spin_unlock(&conn->session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1293 | return rc; |
| 1294 | } |
| 1295 | EXPORT_SYMBOL_GPL(iscsi_complete_pdu); |
| 1296 | |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1297 | int iscsi_verify_itt(struct iscsi_conn *conn, itt_t itt) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1298 | { |
| 1299 | struct iscsi_session *session = conn->session; |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1300 | int age = 0, i = 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1301 | |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1302 | if (itt == RESERVED_ITT) |
| 1303 | return 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1304 | |
Mike Christie | 262ef63 | 2008-12-02 00:32:13 -0600 | [diff] [blame] | 1305 | if (session->tt->parse_pdu_itt) |
| 1306 | session->tt->parse_pdu_itt(conn, itt, &i, &age); |
| 1307 | else { |
| 1308 | i = get_itt(itt); |
| 1309 | age = ((__force u32)itt >> ISCSI_AGE_SHIFT) & ISCSI_AGE_MASK; |
| 1310 | } |
| 1311 | |
| 1312 | if (age != session->age) { |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1313 | iscsi_conn_printk(KERN_ERR, conn, |
| 1314 | "received itt %x expected session age (%x)\n", |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1315 | (__force u32)itt, session->age); |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1316 | return ISCSI_ERR_BAD_ITT; |
| 1317 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1318 | |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 1319 | if (i >= session->cmds_max) { |
| 1320 | iscsi_conn_printk(KERN_ERR, conn, |
| 1321 | "received invalid itt index %u (max cmds " |
| 1322 | "%u.\n", i, session->cmds_max); |
| 1323 | return ISCSI_ERR_BAD_ITT; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1324 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1325 | return 0; |
| 1326 | } |
| 1327 | EXPORT_SYMBOL_GPL(iscsi_verify_itt); |
| 1328 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1329 | /** |
| 1330 | * iscsi_itt_to_ctask - look up ctask by itt |
| 1331 | * @conn: iscsi connection |
| 1332 | * @itt: itt |
| 1333 | * |
| 1334 | * This should be used for cmd tasks. |
| 1335 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1336 | * The session back_lock must be held. |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1337 | */ |
| 1338 | 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] | 1339 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1340 | struct iscsi_task *task; |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1341 | |
| 1342 | if (iscsi_verify_itt(conn, itt)) |
| 1343 | return NULL; |
| 1344 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1345 | task = iscsi_itt_to_task(conn, itt); |
| 1346 | if (!task || !task->sc) |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1347 | return NULL; |
| 1348 | |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1349 | if (task->sc->SCp.phase != conn->session->age) { |
| 1350 | iscsi_session_printk(KERN_ERR, conn->session, |
| 1351 | "task's session age %d, expected %d\n", |
| 1352 | task->sc->SCp.phase, conn->session->age); |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1353 | return NULL; |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 1354 | } |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1355 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1356 | return task; |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 1357 | } |
| 1358 | EXPORT_SYMBOL_GPL(iscsi_itt_to_ctask); |
| 1359 | |
Mike Christie | 40a06e7 | 2009-03-05 14:46:05 -0600 | [diff] [blame] | 1360 | void iscsi_session_failure(struct iscsi_session *session, |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1361 | enum iscsi_err err) |
| 1362 | { |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1363 | struct iscsi_conn *conn; |
| 1364 | struct device *dev; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1365 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1366 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1367 | conn = session->leadconn; |
| 1368 | if (session->state == ISCSI_STATE_TERMINATE || !conn) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1369 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1370 | return; |
| 1371 | } |
| 1372 | |
| 1373 | dev = get_device(&conn->cls_conn->dev); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1374 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1375 | if (!dev) |
| 1376 | return; |
| 1377 | /* |
| 1378 | * if the host is being removed bypass the connection |
| 1379 | * recovery initialization because we are going to kill |
| 1380 | * the session. |
| 1381 | */ |
| 1382 | if (err == ISCSI_ERR_INVALID_HOST) |
| 1383 | iscsi_conn_error_event(conn->cls_conn, err); |
| 1384 | else |
| 1385 | iscsi_conn_failure(conn, err); |
| 1386 | put_device(dev); |
| 1387 | } |
| 1388 | EXPORT_SYMBOL_GPL(iscsi_session_failure); |
| 1389 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1390 | void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) |
| 1391 | { |
| 1392 | struct iscsi_session *session = conn->session; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1393 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1394 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1395 | if (session->state == ISCSI_STATE_FAILED) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1396 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1397 | return; |
| 1398 | } |
| 1399 | |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 1400 | if (conn->stop_stage == 0) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1401 | session->state = ISCSI_STATE_FAILED; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1402 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1403 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1404 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
| 1405 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 1406 | iscsi_conn_error_event(conn->cls_conn, err); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1407 | } |
| 1408 | EXPORT_SYMBOL_GPL(iscsi_conn_failure); |
| 1409 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1410 | static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn) |
| 1411 | { |
| 1412 | struct iscsi_session *session = conn->session; |
| 1413 | |
| 1414 | /* |
| 1415 | * Check for iSCSI window and take care of CmdSN wrap-around |
| 1416 | */ |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 1417 | if (!iscsi_sna_lte(session->queued_cmdsn, session->max_cmdsn)) { |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1418 | ISCSI_DBG_SESSION(session, "iSCSI CmdSN closed. ExpCmdSn " |
| 1419 | "%u MaxCmdSN %u CmdSN %u/%u\n", |
| 1420 | session->exp_cmdsn, session->max_cmdsn, |
| 1421 | session->cmdsn, session->queued_cmdsn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1422 | return -ENOSPC; |
| 1423 | } |
| 1424 | return 0; |
| 1425 | } |
| 1426 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1427 | static int iscsi_xmit_task(struct iscsi_conn *conn) |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1428 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1429 | struct iscsi_task *task = conn->task; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1430 | int rc; |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1431 | |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1432 | if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) |
| 1433 | return -ENODATA; |
| 1434 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1435 | __iscsi_get_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1436 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1437 | rc = conn->session->tt->xmit_task(task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1438 | spin_lock_bh(&conn->session->frwd_lock); |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1439 | if (!rc) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1440 | /* done with this task */ |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1441 | task->last_xfer = jiffies; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1442 | conn->task = NULL; |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1443 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1444 | /* regular RX path uses back_lock */ |
Shlomo Pongratz | 72b97402 | 2014-03-30 15:26:29 +0300 | [diff] [blame^] | 1445 | spin_lock(&conn->session->back_lock); |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1446 | __iscsi_put_task(task); |
Shlomo Pongratz | 72b97402 | 2014-03-30 15:26:29 +0300 | [diff] [blame^] | 1447 | spin_unlock(&conn->session->back_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1448 | return rc; |
| 1449 | } |
| 1450 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1451 | /** |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1452 | * iscsi_requeue_task - requeue task to run from session workqueue |
| 1453 | * @task: task to requeue |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1454 | * |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1455 | * 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] | 1456 | * 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] | 1457 | * by software drivers. |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1458 | */ |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1459 | void iscsi_requeue_task(struct iscsi_task *task) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1460 | { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1461 | struct iscsi_conn *conn = task->conn; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1462 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1463 | /* |
| 1464 | * this may be on the requeue list already if the xmit_task callout |
| 1465 | * is handling the r2ts while we are adding new ones |
| 1466 | */ |
| 1467 | if (list_empty(&task->running)) |
| 1468 | list_add_tail(&task->running, &conn->requeue); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1469 | iscsi_conn_queue_work(conn); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1470 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1471 | EXPORT_SYMBOL_GPL(iscsi_requeue_task); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1472 | |
| 1473 | /** |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1474 | * iscsi_data_xmit - xmit any command into the scheduled connection |
| 1475 | * @conn: iscsi connection |
| 1476 | * |
| 1477 | * Notes: |
| 1478 | * The function can return -EAGAIN in which case the caller must |
| 1479 | * re-schedule it again later or recover. '0' return code means |
| 1480 | * successful xmit. |
| 1481 | **/ |
| 1482 | static int iscsi_data_xmit(struct iscsi_conn *conn) |
| 1483 | { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1484 | struct iscsi_task *task; |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1485 | int rc = 0; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1486 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1487 | spin_lock_bh(&conn->session->frwd_lock); |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1488 | if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) { |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1489 | ISCSI_DBG_SESSION(conn->session, "Tx suspended!\n"); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1490 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1491 | return -ENODATA; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1492 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1493 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1494 | if (conn->task) { |
| 1495 | rc = iscsi_xmit_task(conn); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1496 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1497 | goto done; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1498 | } |
| 1499 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1500 | /* |
| 1501 | * process mgmt pdus like nops before commands since we should |
| 1502 | * only have one nop-out as a ping from us and targets should not |
| 1503 | * overflow us with nop-ins |
| 1504 | */ |
| 1505 | check_mgmt: |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1506 | while (!list_empty(&conn->mgmtqueue)) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1507 | conn->task = list_entry(conn->mgmtqueue.next, |
| 1508 | struct iscsi_task, running); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1509 | list_del_init(&conn->task->running); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1510 | if (iscsi_prep_mgmt_task(conn, conn->task)) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1511 | /* regular RX path uses back_lock */ |
| 1512 | spin_lock_bh(&conn->session->back_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1513 | __iscsi_put_task(conn->task); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1514 | spin_unlock_bh(&conn->session->back_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1515 | conn->task = NULL; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1516 | continue; |
| 1517 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1518 | rc = iscsi_xmit_task(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1519 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1520 | goto done; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1521 | } |
| 1522 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1523 | /* process pending command queue */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1524 | while (!list_empty(&conn->cmdqueue)) { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1525 | conn->task = list_entry(conn->cmdqueue.next, struct iscsi_task, |
| 1526 | running); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1527 | list_del_init(&conn->task->running); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1528 | if (conn->session->state == ISCSI_STATE_LOGGING_OUT) { |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1529 | fail_scsi_task(conn->task, DID_IMM_RETRY); |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1530 | continue; |
| 1531 | } |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1532 | rc = iscsi_prep_scsi_cmd_pdu(conn->task); |
| 1533 | if (rc) { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1534 | if (rc == -ENOMEM || rc == -EACCES) { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1535 | list_add_tail(&conn->task->running, |
| 1536 | &conn->cmdqueue); |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1537 | conn->task = NULL; |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1538 | goto done; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1539 | } else |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1540 | fail_scsi_task(conn->task, DID_ABORT); |
Boaz Harrosh | 004d653 | 2007-12-13 12:43:23 -0600 | [diff] [blame] | 1541 | continue; |
| 1542 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1543 | rc = iscsi_xmit_task(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1544 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1545 | goto done; |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1546 | /* |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1547 | * we could continuously get new task requests so |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1548 | * we need to check the mgmt queue for nops that need to |
| 1549 | * be sent to aviod starvation |
| 1550 | */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1551 | if (!list_empty(&conn->mgmtqueue)) |
| 1552 | goto check_mgmt; |
| 1553 | } |
| 1554 | |
| 1555 | while (!list_empty(&conn->requeue)) { |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1556 | /* |
| 1557 | * we always do fastlogout - conn stop code will clean up. |
| 1558 | */ |
| 1559 | if (conn->session->state == ISCSI_STATE_LOGGING_OUT) |
| 1560 | break; |
| 1561 | |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1562 | task = list_entry(conn->requeue.next, struct iscsi_task, |
| 1563 | running); |
| 1564 | if (iscsi_check_tmf_restrictions(task, ISCSI_OP_SCSI_DATA_OUT)) |
| 1565 | break; |
| 1566 | |
| 1567 | conn->task = task; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1568 | list_del_init(&conn->task->running); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1569 | conn->task->state = ISCSI_TASK_RUNNING; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1570 | rc = iscsi_xmit_task(conn); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1571 | if (rc) |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1572 | goto done; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1573 | if (!list_empty(&conn->mgmtqueue)) |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1574 | goto check_mgmt; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1575 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1576 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1577 | return -ENODATA; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1578 | |
Mike Christie | 70b31c1 | 2009-08-20 15:11:03 -0500 | [diff] [blame] | 1579 | done: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1580 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1581 | return rc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1582 | } |
| 1583 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1584 | static void iscsi_xmitworker(struct work_struct *work) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1585 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1586 | struct iscsi_conn *conn = |
| 1587 | container_of(work, struct iscsi_conn, xmitwork); |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1588 | int rc; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1589 | /* |
| 1590 | * serialize Xmit worker on a per-connection basis. |
| 1591 | */ |
Mike Christie | 3219e52 | 2006-05-30 00:37:28 -0500 | [diff] [blame] | 1592 | do { |
| 1593 | rc = iscsi_data_xmit(conn); |
| 1594 | } while (rc >= 0 || rc == -EAGAIN); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1595 | } |
| 1596 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1597 | static inline struct iscsi_task *iscsi_alloc_task(struct iscsi_conn *conn, |
| 1598 | struct scsi_cmnd *sc) |
| 1599 | { |
| 1600 | struct iscsi_task *task; |
| 1601 | |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 1602 | if (!kfifo_out(&conn->session->cmdpool.queue, |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1603 | (void *) &task, sizeof(void *))) |
| 1604 | return NULL; |
| 1605 | |
| 1606 | sc->SCp.phase = conn->session->age; |
| 1607 | sc->SCp.ptr = (char *) task; |
| 1608 | |
| 1609 | atomic_set(&task->refcount, 1); |
| 1610 | task->state = ISCSI_TASK_PENDING; |
| 1611 | task->conn = conn; |
| 1612 | task->sc = sc; |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1613 | task->have_checked_conn = false; |
| 1614 | task->last_timeout = jiffies; |
| 1615 | task->last_xfer = jiffies; |
Sagi Grimberg | 55e51ed | 2014-03-05 19:43:49 +0200 | [diff] [blame] | 1616 | task->protected = false; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1617 | INIT_LIST_HEAD(&task->running); |
| 1618 | return task; |
| 1619 | } |
| 1620 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1621 | enum { |
| 1622 | FAILURE_BAD_HOST = 1, |
| 1623 | FAILURE_SESSION_FAILED, |
| 1624 | FAILURE_SESSION_FREED, |
| 1625 | FAILURE_WINDOW_CLOSED, |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 1626 | FAILURE_OOM, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1627 | FAILURE_SESSION_TERMINATE, |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1628 | FAILURE_SESSION_IN_RECOVERY, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1629 | FAILURE_SESSION_RECOVERY_TIMEOUT, |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1630 | FAILURE_SESSION_LOGGING_OUT, |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1631 | FAILURE_SESSION_NOT_READY, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1632 | }; |
| 1633 | |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1634 | int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1635 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1636 | struct iscsi_cls_session *cls_session; |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1637 | struct iscsi_host *ihost; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1638 | int reason = 0; |
| 1639 | struct iscsi_session *session; |
| 1640 | struct iscsi_conn *conn; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1641 | struct iscsi_task *task = NULL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1642 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1643 | sc->result = 0; |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 1644 | sc->SCp.ptr = NULL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1645 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1646 | ihost = shost_priv(host); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1647 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1648 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 1649 | session = cls_session->dd_data; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1650 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1651 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1652 | reason = iscsi_session_chkready(cls_session); |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1653 | if (reason) { |
| 1654 | sc->result = reason; |
| 1655 | goto fault; |
| 1656 | } |
| 1657 | |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1658 | if (session->state != ISCSI_STATE_LOGGED_IN) { |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1659 | /* |
| 1660 | * to handle the race between when we set the recovery state |
| 1661 | * and block the session we requeue here (commands could |
| 1662 | * be entering our queuecommand while a block is starting |
| 1663 | * up because the block code is not locked) |
| 1664 | */ |
Mike Christie | 9000bcd | 2007-12-13 12:43:32 -0600 | [diff] [blame] | 1665 | switch (session->state) { |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1666 | case ISCSI_STATE_FAILED: |
Mike Christie | 9000bcd | 2007-12-13 12:43:32 -0600 | [diff] [blame] | 1667 | case ISCSI_STATE_IN_RECOVERY: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1668 | reason = FAILURE_SESSION_IN_RECOVERY; |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1669 | sc->result = DID_IMM_RETRY << 16; |
| 1670 | break; |
Mike Christie | 9000bcd | 2007-12-13 12:43:32 -0600 | [diff] [blame] | 1671 | case ISCSI_STATE_LOGGING_OUT: |
| 1672 | reason = FAILURE_SESSION_LOGGING_OUT; |
Mike Christie | 301e0f7 | 2009-05-13 17:57:47 -0500 | [diff] [blame] | 1673 | sc->result = DID_IMM_RETRY << 16; |
| 1674 | break; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1675 | case ISCSI_STATE_RECOVERY_FAILED: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1676 | reason = FAILURE_SESSION_RECOVERY_TIMEOUT; |
Mike Christie | 56d7fcf | 2008-08-19 18:45:26 -0500 | [diff] [blame] | 1677 | sc->result = DID_TRANSPORT_FAILFAST << 16; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1678 | break; |
| 1679 | case ISCSI_STATE_TERMINATE: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1680 | reason = FAILURE_SESSION_TERMINATE; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1681 | sc->result = DID_NO_CONNECT << 16; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1682 | break; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1683 | default: |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 1684 | reason = FAILURE_SESSION_FREED; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1685 | sc->result = DID_NO_CONNECT << 16; |
Mike Christie | b3a7ea8 | 2007-12-13 12:43:26 -0600 | [diff] [blame] | 1686 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1687 | goto fault; |
| 1688 | } |
| 1689 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1690 | conn = session->leadconn; |
Mike Christie | 9864404 | 2006-10-16 18:09:39 -0400 | [diff] [blame] | 1691 | if (!conn) { |
| 1692 | reason = FAILURE_SESSION_FREED; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 1693 | sc->result = DID_NO_CONNECT << 16; |
Mike Christie | 9864404 | 2006-10-16 18:09:39 -0400 | [diff] [blame] | 1694 | goto fault; |
| 1695 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1696 | |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1697 | if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) { |
| 1698 | reason = FAILURE_SESSION_IN_RECOVERY; |
| 1699 | sc->result = DID_REQUEUE; |
| 1700 | goto fault; |
| 1701 | } |
| 1702 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1703 | if (iscsi_check_cmdsn_window_closed(conn)) { |
| 1704 | reason = FAILURE_WINDOW_CLOSED; |
| 1705 | goto reject; |
| 1706 | } |
| 1707 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1708 | task = iscsi_alloc_task(conn, sc); |
| 1709 | if (!task) { |
Mike Christie | 60ecebf | 2006-08-31 18:09:25 -0400 | [diff] [blame] | 1710 | reason = FAILURE_OOM; |
| 1711 | goto reject; |
| 1712 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1713 | |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1714 | if (!ihost->workq) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1715 | reason = iscsi_prep_scsi_cmd_pdu(task); |
| 1716 | if (reason) { |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 1717 | if (reason == -ENOMEM || reason == -EACCES) { |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1718 | reason = FAILURE_OOM; |
| 1719 | goto prepd_reject; |
| 1720 | } else { |
| 1721 | sc->result = DID_ABORT << 16; |
| 1722 | goto prepd_fault; |
| 1723 | } |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1724 | } |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1725 | if (session->tt->xmit_task(task)) { |
Mike Christie | d3305f3 | 2009-08-20 15:10:58 -0500 | [diff] [blame] | 1726 | session->cmdsn--; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1727 | reason = FAILURE_SESSION_NOT_READY; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1728 | goto prepd_reject; |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1729 | } |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1730 | } else { |
| 1731 | list_add_tail(&task->running, &conn->cmdqueue); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1732 | iscsi_conn_queue_work(conn); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1733 | } |
Mike Christie | 052d014 | 2008-05-21 15:54:05 -0500 | [diff] [blame] | 1734 | |
| 1735 | session->queued_cmdsn++; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1736 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1737 | return 0; |
| 1738 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1739 | prepd_reject: |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1740 | iscsi_complete_task(task, ISCSI_TASK_REQUEUE_SCSIQ); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1741 | reject: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1742 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1743 | ISCSI_DBG_SESSION(session, "cmd 0x%x rejected (%d)\n", |
| 1744 | sc->cmnd[0], reason); |
Mike Christie | d6d13ee | 2008-08-17 15:24:43 -0500 | [diff] [blame] | 1745 | return SCSI_MLQUEUE_TARGET_BUSY; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1746 | |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 1747 | prepd_fault: |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1748 | iscsi_complete_task(task, ISCSI_TASK_REQUEUE_SCSIQ); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1749 | fault: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1750 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 1751 | ISCSI_DBG_SESSION(session, "iscsi: cmd 0x%x is not queued (%d)\n", |
| 1752 | sc->cmnd[0], reason); |
Boaz Harrosh | c07d444 | 2008-04-18 10:11:52 -0500 | [diff] [blame] | 1753 | if (!scsi_bidi_cmnd(sc)) |
| 1754 | scsi_set_resid(sc, scsi_bufflen(sc)); |
| 1755 | else { |
| 1756 | scsi_out(sc)->resid = scsi_out(sc)->length; |
| 1757 | scsi_in(sc)->resid = scsi_in(sc)->length; |
| 1758 | } |
Mike Christie | f41d472 | 2010-12-31 02:22:21 -0600 | [diff] [blame] | 1759 | sc->scsi_done(sc); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1760 | return 0; |
| 1761 | } |
| 1762 | EXPORT_SYMBOL_GPL(iscsi_queuecommand); |
| 1763 | |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1764 | 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] | 1765 | { |
Mike Christie | 1796e72 | 2009-11-11 16:34:36 -0600 | [diff] [blame] | 1766 | switch (reason) { |
| 1767 | case SCSI_QDEPTH_DEFAULT: |
| 1768 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); |
| 1769 | break; |
| 1770 | case SCSI_QDEPTH_QFULL: |
| 1771 | scsi_track_queue_full(sdev, depth); |
| 1772 | break; |
| 1773 | case SCSI_QDEPTH_RAMP_UP: |
| 1774 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); |
| 1775 | break; |
| 1776 | default: |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1777 | return -EOPNOTSUPP; |
Mike Christie | 1796e72 | 2009-11-11 16:34:36 -0600 | [diff] [blame] | 1778 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1779 | return sdev->queue_depth; |
| 1780 | } |
| 1781 | EXPORT_SYMBOL_GPL(iscsi_change_queue_depth); |
| 1782 | |
Mike Christie | 6b5d6c4 | 2009-04-21 15:32:32 -0500 | [diff] [blame] | 1783 | int iscsi_target_alloc(struct scsi_target *starget) |
| 1784 | { |
| 1785 | struct iscsi_cls_session *cls_session = starget_to_session(starget); |
| 1786 | struct iscsi_session *session = cls_session->dd_data; |
| 1787 | |
| 1788 | starget->can_queue = session->scsi_cmds_max; |
| 1789 | return 0; |
| 1790 | } |
| 1791 | EXPORT_SYMBOL_GPL(iscsi_target_alloc); |
| 1792 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1793 | static void iscsi_tmf_timedout(unsigned long data) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1794 | { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1795 | struct iscsi_conn *conn = (struct iscsi_conn *)data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1796 | struct iscsi_session *session = conn->session; |
| 1797 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1798 | spin_lock(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1799 | if (conn->tmf_state == TMF_QUEUED) { |
| 1800 | conn->tmf_state = TMF_TIMEDOUT; |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1801 | ISCSI_DBG_EH(session, "tmf timedout\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1802 | /* unblock eh_abort() */ |
| 1803 | wake_up(&conn->ehwait); |
| 1804 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1805 | spin_unlock(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1806 | } |
| 1807 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1808 | static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn, |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1809 | struct iscsi_tm *hdr, int age, |
| 1810 | int timeout) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1811 | { |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1812 | struct iscsi_session *session = conn->session; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1813 | struct iscsi_task *task; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1814 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1815 | task = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr, |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1816 | NULL, 0); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1817 | if (!task) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1818 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 1819 | iscsi_conn_printk(KERN_ERR, conn, "Could not send TMF.\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1820 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1821 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 1822 | return -EPERM; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1823 | } |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1824 | conn->tmfcmd_pdus_cnt++; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1825 | conn->tmf_timer.expires = timeout * HZ + jiffies; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1826 | conn->tmf_timer.function = iscsi_tmf_timedout; |
| 1827 | conn->tmf_timer.data = (unsigned long)conn; |
| 1828 | add_timer(&conn->tmf_timer); |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1829 | ISCSI_DBG_EH(session, "tmf set timeout\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1830 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1831 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1832 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1833 | |
| 1834 | /* |
| 1835 | * block eh thread until: |
| 1836 | * |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1837 | * 1) tmf response |
| 1838 | * 2) tmf timeout |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1839 | * 3) session is terminated or restarted or userspace has |
| 1840 | * given up on recovery |
| 1841 | */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1842 | wait_event_interruptible(conn->ehwait, age != session->age || |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1843 | session->state != ISCSI_STATE_LOGGED_IN || |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1844 | conn->tmf_state != TMF_QUEUED); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1845 | if (signal_pending(current)) |
| 1846 | flush_signals(current); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1847 | del_timer_sync(&conn->tmf_timer); |
| 1848 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1849 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1850 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 1851 | /* if the session drops it will clean up the task */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1852 | if (age != session->age || |
| 1853 | session->state != ISCSI_STATE_LOGGED_IN) |
| 1854 | return -ENOTCONN; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 1855 | return 0; |
| 1856 | } |
| 1857 | |
| 1858 | /* |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1859 | * Fail commands. session lock held and recv side suspended and xmit |
| 1860 | * thread flushed |
| 1861 | */ |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1862 | static void fail_scsi_tasks(struct iscsi_conn *conn, unsigned lun, |
| 1863 | int error) |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1864 | { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1865 | struct iscsi_task *task; |
| 1866 | int i; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1867 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1868 | for (i = 0; i < conn->session->cmds_max; i++) { |
| 1869 | task = conn->session->cmds[i]; |
| 1870 | if (!task->sc || task->state == ISCSI_TASK_FREE) |
| 1871 | continue; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1872 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1873 | if (lun != -1 && lun != task->sc->device->lun) |
| 1874 | continue; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1875 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 1876 | ISCSI_DBG_SESSION(conn->session, |
| 1877 | "failing sc %p itt 0x%x state %d\n", |
| 1878 | task->sc, task->itt, task->state); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 1879 | fail_scsi_task(task, error); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 1880 | } |
| 1881 | } |
| 1882 | |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1883 | /** |
| 1884 | * iscsi_suspend_queue - suspend iscsi_queuecommand |
| 1885 | * @conn: iscsi conn to stop queueing IO on |
| 1886 | * |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1887 | * 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] | 1888 | * xmit_task/queuecommand, and then sets suspend to prevent |
| 1889 | * new commands from being queued. This only needs to be called |
| 1890 | * by offload drivers that need to sync a path like ep disconnect |
| 1891 | * with the iscsi_queuecommand/xmit_task. To start IO again libiscsi |
| 1892 | * will call iscsi_start_tx and iscsi_unblock_session when in FFP. |
| 1893 | */ |
| 1894 | void iscsi_suspend_queue(struct iscsi_conn *conn) |
| 1895 | { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1896 | spin_lock_bh(&conn->session->frwd_lock); |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1897 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1898 | spin_unlock_bh(&conn->session->frwd_lock); |
Mike Christie | 661134a | 2009-09-05 07:35:33 +0530 | [diff] [blame] | 1899 | } |
| 1900 | EXPORT_SYMBOL_GPL(iscsi_suspend_queue); |
| 1901 | |
| 1902 | /** |
| 1903 | * iscsi_suspend_tx - suspend iscsi_data_xmit |
| 1904 | * @conn: iscsi conn tp stop processing IO on. |
| 1905 | * |
| 1906 | * This function sets the suspend bit to prevent iscsi_data_xmit |
| 1907 | * from sending new IO, and if work is queued on the xmit thread |
| 1908 | * it will wait for it to be completed. |
| 1909 | */ |
Mike Christie | b40977d | 2008-05-21 15:54:03 -0500 | [diff] [blame] | 1910 | void iscsi_suspend_tx(struct iscsi_conn *conn) |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1911 | { |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1912 | struct Scsi_Host *shost = conn->session->host; |
| 1913 | struct iscsi_host *ihost = shost_priv(shost); |
| 1914 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1915 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1916 | if (ihost->workq) |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 1917 | flush_workqueue(ihost->workq); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1918 | } |
Mike Christie | b40977d | 2008-05-21 15:54:03 -0500 | [diff] [blame] | 1919 | EXPORT_SYMBOL_GPL(iscsi_suspend_tx); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1920 | |
| 1921 | static void iscsi_start_tx(struct iscsi_conn *conn) |
| 1922 | { |
| 1923 | clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
Mike Christie | 1336aed | 2009-05-13 17:57:48 -0500 | [diff] [blame] | 1924 | iscsi_conn_queue_work(conn); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 1925 | } |
| 1926 | |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 1927 | /* |
| 1928 | * We want to make sure a ping is in flight. It has timed out. |
| 1929 | * And we are not busy processing a pdu that is making |
| 1930 | * progress but got started before the ping and is taking a while |
| 1931 | * to complete so the ping is just stuck behind it in a queue. |
| 1932 | */ |
| 1933 | static int iscsi_has_ping_timed_out(struct iscsi_conn *conn) |
| 1934 | { |
| 1935 | if (conn->ping_task && |
| 1936 | time_before_eq(conn->last_recv + (conn->recv_timeout * HZ) + |
| 1937 | (conn->ping_timeout * HZ), jiffies)) |
| 1938 | return 1; |
| 1939 | else |
| 1940 | return 0; |
| 1941 | } |
| 1942 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1943 | 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] | 1944 | { |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1945 | enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED; |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1946 | struct iscsi_task *task = NULL, *running_task; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1947 | struct iscsi_cls_session *cls_session; |
| 1948 | struct iscsi_session *session; |
| 1949 | struct iscsi_conn *conn; |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1950 | int i; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1951 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1952 | cls_session = starget_to_session(scsi_target(sc->device)); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 1953 | session = cls_session->dd_data; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1954 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1955 | ISCSI_DBG_EH(session, "scsi cmd %p timedout\n", sc); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1956 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 1957 | spin_lock(&session->frwd_lock); |
Mike Christie | e3d338a | 2012-01-26 21:13:11 -0600 | [diff] [blame] | 1958 | task = (struct iscsi_task *)sc->SCp.ptr; |
| 1959 | if (!task) { |
| 1960 | /* |
| 1961 | * Raced with completion. Blk layer has taken ownership |
| 1962 | * so let timeout code complete it now. |
| 1963 | */ |
| 1964 | rc = BLK_EH_HANDLED; |
| 1965 | goto done; |
| 1966 | } |
| 1967 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1968 | if (session->state != ISCSI_STATE_LOGGED_IN) { |
| 1969 | /* |
| 1970 | * We are probably in the middle of iscsi recovery so let |
| 1971 | * that complete and handle the error. |
| 1972 | */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 1973 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1974 | goto done; |
| 1975 | } |
| 1976 | |
| 1977 | conn = session->leadconn; |
| 1978 | if (!conn) { |
| 1979 | /* In the middle of shuting down */ |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 1980 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 1981 | goto done; |
| 1982 | } |
| 1983 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1984 | /* |
| 1985 | * If we have sent (at least queued to the network layer) a pdu or |
| 1986 | * recvd one for the task since the last timeout ask for |
| 1987 | * more time. If on the next timeout we have not made progress |
| 1988 | * we can check if it is the task or connection when we send the |
| 1989 | * nop as a ping. |
| 1990 | */ |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1991 | if (time_after(task->last_xfer, task->last_timeout)) { |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1992 | ISCSI_DBG_EH(session, "Command making progress. Asking " |
| 1993 | "scsi-ml for more time to complete. " |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 1994 | "Last data xfer at %lu. Last timeout was at " |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 1995 | "%lu\n.", task->last_xfer, task->last_timeout); |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 1996 | task->have_checked_conn = false; |
| 1997 | rc = BLK_EH_RESET_TIMER; |
| 1998 | goto done; |
| 1999 | } |
| 2000 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2001 | if (!conn->recv_timeout && !conn->ping_timeout) |
| 2002 | goto done; |
| 2003 | /* |
| 2004 | * if the ping timedout then we are in the middle of cleaning up |
| 2005 | * and can let the iscsi eh handle it |
| 2006 | */ |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2007 | if (iscsi_has_ping_timed_out(conn)) { |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 2008 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2009 | goto done; |
| 2010 | } |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2011 | |
Mike Christie | 92ed4d6 | 2010-02-10 16:51:45 -0600 | [diff] [blame] | 2012 | for (i = 0; i < conn->session->cmds_max; i++) { |
| 2013 | running_task = conn->session->cmds[i]; |
| 2014 | if (!running_task->sc || running_task == task || |
| 2015 | running_task->state != ISCSI_TASK_RUNNING) |
| 2016 | continue; |
| 2017 | |
| 2018 | /* |
| 2019 | * Only check if cmds started before this one have made |
| 2020 | * progress, or this could never fail |
| 2021 | */ |
| 2022 | if (time_after(running_task->sc->jiffies_at_alloc, |
| 2023 | task->sc->jiffies_at_alloc)) |
| 2024 | continue; |
| 2025 | |
| 2026 | if (time_after(running_task->last_xfer, task->last_timeout)) { |
| 2027 | /* |
| 2028 | * This task has not made progress, but a task |
| 2029 | * started before us has transferred data since |
| 2030 | * we started/last-checked. We could be queueing |
| 2031 | * too many tasks or the LU is bad. |
| 2032 | * |
| 2033 | * If the device is bad the cmds ahead of us on |
| 2034 | * other devs will complete, and this loop will |
| 2035 | * eventually fail starting the scsi eh. |
| 2036 | */ |
| 2037 | ISCSI_DBG_EH(session, "Command has not made progress " |
| 2038 | "but commands ahead of it have. " |
| 2039 | "Asking scsi-ml for more time to " |
| 2040 | "complete. Our last xfer vs running task " |
| 2041 | "last xfer %lu/%lu. Last check %lu.\n", |
| 2042 | task->last_xfer, running_task->last_xfer, |
| 2043 | task->last_timeout); |
| 2044 | rc = BLK_EH_RESET_TIMER; |
| 2045 | goto done; |
| 2046 | } |
| 2047 | } |
| 2048 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2049 | /* Assumes nop timeout is shorter than scsi cmd timeout */ |
| 2050 | if (task->have_checked_conn) |
| 2051 | goto done; |
| 2052 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2053 | /* |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2054 | * Checking the transport already or nop from a cmd timeout still |
| 2055 | * running |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2056 | */ |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2057 | if (conn->ping_task) { |
| 2058 | task->have_checked_conn = true; |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 2059 | rc = BLK_EH_RESET_TIMER; |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2060 | goto done; |
| 2061 | } |
| 2062 | |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2063 | /* Make sure there is a transport check done */ |
| 2064 | iscsi_send_nopout(conn, NULL); |
| 2065 | task->have_checked_conn = true; |
| 2066 | rc = BLK_EH_RESET_TIMER; |
| 2067 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2068 | done: |
Mike Christie | d355e57 | 2009-06-15 22:11:08 -0500 | [diff] [blame] | 2069 | if (task) |
| 2070 | task->last_timeout = jiffies; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2071 | spin_unlock(&session->frwd_lock); |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2072 | ISCSI_DBG_EH(session, "return %s\n", rc == BLK_EH_RESET_TIMER ? |
| 2073 | "timer reset" : "nh"); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2074 | return rc; |
| 2075 | } |
| 2076 | |
| 2077 | static void iscsi_check_transport_timeouts(unsigned long data) |
| 2078 | { |
| 2079 | struct iscsi_conn *conn = (struct iscsi_conn *)data; |
| 2080 | struct iscsi_session *session = conn->session; |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2081 | unsigned long recv_timeout, next_timeout = 0, last_recv; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2082 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2083 | spin_lock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2084 | if (session->state != ISCSI_STATE_LOGGED_IN) |
| 2085 | goto done; |
| 2086 | |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2087 | recv_timeout = conn->recv_timeout; |
| 2088 | if (!recv_timeout) |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2089 | goto done; |
| 2090 | |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2091 | recv_timeout *= HZ; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2092 | last_recv = conn->last_recv; |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2093 | |
| 2094 | if (iscsi_has_ping_timed_out(conn)) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2095 | iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs " |
Mike Christie | 4c48a82 | 2009-05-13 17:57:45 -0500 | [diff] [blame] | 2096 | "expired, recv timeout %d, last rx %lu, " |
| 2097 | "last ping %lu, now %lu\n", |
| 2098 | conn->ping_timeout, conn->recv_timeout, |
| 2099 | last_recv, conn->last_ping, jiffies); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2100 | spin_unlock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2101 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
| 2102 | return; |
| 2103 | } |
| 2104 | |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2105 | if (time_before_eq(last_recv + recv_timeout, jiffies)) { |
Mike Christie | c8611f9 | 2008-05-08 20:15:34 -0500 | [diff] [blame] | 2106 | /* send a ping to try to provoke some traffic */ |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 2107 | ISCSI_DBG_CONN(conn, "Sending nopout as ping\n"); |
Mike Christie | c8611f9 | 2008-05-08 20:15:34 -0500 | [diff] [blame] | 2108 | iscsi_send_nopout(conn, NULL); |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2109 | next_timeout = conn->last_ping + (conn->ping_timeout * HZ); |
Mike Christie | ad294e9 | 2008-01-31 13:36:50 -0600 | [diff] [blame] | 2110 | } else |
Mike Christie | 4cf1043 | 2008-05-07 20:43:52 -0500 | [diff] [blame] | 2111 | next_timeout = last_recv + recv_timeout; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2112 | |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 2113 | ISCSI_DBG_CONN(conn, "Setting next tmo %lu\n", next_timeout); |
Mike Christie | ad294e9 | 2008-01-31 13:36:50 -0600 | [diff] [blame] | 2114 | mod_timer(&conn->transport_timer, next_timeout); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2115 | done: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2116 | spin_unlock(&session->frwd_lock); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2117 | } |
| 2118 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2119 | static void iscsi_prep_abort_task_pdu(struct iscsi_task *task, |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2120 | struct iscsi_tm *hdr) |
| 2121 | { |
| 2122 | memset(hdr, 0, sizeof(*hdr)); |
| 2123 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; |
| 2124 | hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK; |
| 2125 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 2126 | hdr->lun = task->lun; |
Mike Christie | 577577d | 2008-12-02 00:32:05 -0600 | [diff] [blame] | 2127 | hdr->rtt = task->hdr_itt; |
| 2128 | hdr->refcmdsn = task->cmdsn; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2129 | } |
| 2130 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2131 | int iscsi_eh_abort(struct scsi_cmnd *sc) |
| 2132 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2133 | struct iscsi_cls_session *cls_session; |
| 2134 | struct iscsi_session *session; |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 2135 | struct iscsi_conn *conn; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2136 | struct iscsi_task *task; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2137 | struct iscsi_tm *hdr; |
| 2138 | int rc, age; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2139 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2140 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2141 | session = cls_session->dd_data; |
| 2142 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2143 | ISCSI_DBG_EH(session, "aborting sc %p\n", sc); |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 2144 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2145 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2146 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 2147 | /* |
| 2148 | * if session was ISCSI_STATE_IN_RECOVERY then we may not have |
| 2149 | * got the command. |
| 2150 | */ |
| 2151 | if (!sc->SCp.ptr) { |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2152 | ISCSI_DBG_EH(session, "sc never reached iscsi layer or " |
| 2153 | "it completed.\n"); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2154 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2155 | mutex_unlock(&session->eh_mutex); |
Mike Christie | f47f2cf | 2006-08-31 18:09:33 -0400 | [diff] [blame] | 2156 | return SUCCESS; |
| 2157 | } |
| 2158 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2159 | /* |
| 2160 | * If we are not logged in or we have started a new session |
| 2161 | * then let the host reset code handle this |
| 2162 | */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2163 | if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN || |
| 2164 | sc->SCp.phase != session->age) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2165 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2166 | mutex_unlock(&session->eh_mutex); |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2167 | ISCSI_DBG_EH(session, "failing abort due to dropped " |
Mike Christie | 4421c9e | 2009-05-13 17:57:50 -0500 | [diff] [blame] | 2168 | "session.\n"); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2169 | return FAILED; |
| 2170 | } |
| 2171 | |
| 2172 | conn = session->leadconn; |
| 2173 | conn->eh_abort_cnt++; |
| 2174 | age = session->age; |
| 2175 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2176 | task = (struct iscsi_task *)sc->SCp.ptr; |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2177 | ISCSI_DBG_EH(session, "aborting [sc %p itt 0x%x]\n", |
| 2178 | sc, task->itt); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2179 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2180 | /* task completed before time out */ |
| 2181 | if (!task->sc) { |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2182 | ISCSI_DBG_EH(session, "sc completed while abort in progress\n"); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2183 | goto success; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 2184 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2185 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2186 | if (task->state == ISCSI_TASK_PENDING) { |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 2187 | fail_scsi_task(task, DID_ABORT); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2188 | goto success; |
| 2189 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2190 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2191 | /* only have one tmf outstanding at a time */ |
| 2192 | if (conn->tmf_state != TMF_INITIAL) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2193 | goto failed; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2194 | conn->tmf_state = TMF_QUEUED; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2195 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2196 | hdr = &conn->tmhdr; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2197 | iscsi_prep_abort_task_pdu(task, hdr); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2198 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2199 | if (iscsi_exec_task_mgmt_fn(conn, hdr, age, session->abort_timeout)) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2200 | rc = FAILED; |
| 2201 | goto failed; |
| 2202 | } |
| 2203 | |
| 2204 | switch (conn->tmf_state) { |
| 2205 | case TMF_SUCCESS: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2206 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 2207 | /* |
| 2208 | * stop tx side incase the target had sent a abort rsp but |
| 2209 | * the initiator was still writing out data. |
| 2210 | */ |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2211 | iscsi_suspend_tx(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2212 | /* |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 2213 | * we do not stop the recv side because targets have been |
| 2214 | * good and have never sent us a successful tmf response |
| 2215 | * then sent more data for the cmd. |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2216 | */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2217 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 2218 | fail_scsi_task(task, DID_ABORT); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2219 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 2220 | memset(hdr, 0, sizeof(*hdr)); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2221 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2222 | iscsi_start_tx(conn); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2223 | goto success_unlocked; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2224 | case TMF_TIMEDOUT: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2225 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2226 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2227 | goto failed_unlocked; |
| 2228 | case TMF_NOT_FOUND: |
| 2229 | if (!sc->SCp.ptr) { |
| 2230 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 2231 | memset(hdr, 0, sizeof(*hdr)); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2232 | /* task completed before tmf abort response */ |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2233 | ISCSI_DBG_EH(session, "sc completed while abort in " |
| 2234 | "progress\n"); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2235 | goto success; |
Mike Christie | 7ea8b82 | 2006-07-24 15:47:22 -0500 | [diff] [blame] | 2236 | } |
| 2237 | /* fall through */ |
| 2238 | default: |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2239 | conn->tmf_state = TMF_INITIAL; |
| 2240 | goto failed; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2241 | } |
| 2242 | |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2243 | success: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2244 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2245 | success_unlocked: |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2246 | ISCSI_DBG_EH(session, "abort success [sc %p itt 0x%x]\n", |
| 2247 | sc, task->itt); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2248 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2249 | return SUCCESS; |
| 2250 | |
| 2251 | failed: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2252 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 77a23c2 | 2007-05-30 12:57:18 -0500 | [diff] [blame] | 2253 | failed_unlocked: |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2254 | ISCSI_DBG_EH(session, "abort failed [sc %p itt 0x%x]\n", sc, |
| 2255 | task ? task->itt : 0); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2256 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2257 | return FAILED; |
| 2258 | } |
| 2259 | EXPORT_SYMBOL_GPL(iscsi_eh_abort); |
| 2260 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2261 | static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) |
| 2262 | { |
| 2263 | memset(hdr, 0, sizeof(*hdr)); |
| 2264 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; |
| 2265 | hdr->flags = ISCSI_TM_FUNC_LOGICAL_UNIT_RESET & ISCSI_FLAG_TM_FUNC_MASK; |
| 2266 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
Andy Grover | 55bdabd | 2011-06-16 15:57:09 -0700 | [diff] [blame] | 2267 | int_to_scsilun(sc->device->lun, &hdr->lun); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2268 | hdr->rtt = RESERVED_ITT; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2269 | } |
| 2270 | |
| 2271 | int iscsi_eh_device_reset(struct scsi_cmnd *sc) |
| 2272 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2273 | struct iscsi_cls_session *cls_session; |
| 2274 | struct iscsi_session *session; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2275 | struct iscsi_conn *conn; |
| 2276 | struct iscsi_tm *hdr; |
| 2277 | int rc = FAILED; |
| 2278 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2279 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2280 | session = cls_session->dd_data; |
| 2281 | |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2282 | 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] | 2283 | |
| 2284 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2285 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2286 | /* |
| 2287 | * Just check if we are not logged in. We cannot check for |
| 2288 | * the phase because the reset could come from a ioctl. |
| 2289 | */ |
| 2290 | if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN) |
| 2291 | goto unlock; |
| 2292 | conn = session->leadconn; |
| 2293 | |
| 2294 | /* only have one tmf outstanding at a time */ |
| 2295 | if (conn->tmf_state != TMF_INITIAL) |
| 2296 | goto unlock; |
| 2297 | conn->tmf_state = TMF_QUEUED; |
| 2298 | |
| 2299 | hdr = &conn->tmhdr; |
| 2300 | iscsi_prep_lun_reset_pdu(sc, hdr); |
| 2301 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2302 | if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age, |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2303 | session->lu_reset_timeout)) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2304 | rc = FAILED; |
| 2305 | goto unlock; |
| 2306 | } |
| 2307 | |
| 2308 | switch (conn->tmf_state) { |
| 2309 | case TMF_SUCCESS: |
| 2310 | break; |
| 2311 | case TMF_TIMEDOUT: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2312 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2313 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2314 | goto done; |
| 2315 | default: |
| 2316 | conn->tmf_state = TMF_INITIAL; |
| 2317 | goto unlock; |
| 2318 | } |
| 2319 | |
| 2320 | rc = SUCCESS; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2321 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2322 | |
| 2323 | iscsi_suspend_tx(conn); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 2324 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2325 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 2326 | memset(hdr, 0, sizeof(*hdr)); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 2327 | fail_scsi_tasks(conn, sc->device->lun, DID_ERROR); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2328 | conn->tmf_state = TMF_INITIAL; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2329 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2330 | |
| 2331 | iscsi_start_tx(conn); |
| 2332 | goto done; |
| 2333 | |
| 2334 | unlock: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2335 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2336 | done: |
Erez Zilber | bd2199d | 2009-06-15 22:11:10 -0500 | [diff] [blame] | 2337 | ISCSI_DBG_EH(session, "dev reset result = %s\n", |
| 2338 | rc == SUCCESS ? "SUCCESS" : "FAILED"); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2339 | mutex_unlock(&session->eh_mutex); |
| 2340 | return rc; |
| 2341 | } |
| 2342 | EXPORT_SYMBOL_GPL(iscsi_eh_device_reset); |
| 2343 | |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2344 | void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session) |
| 2345 | { |
| 2346 | struct iscsi_session *session = cls_session->dd_data; |
| 2347 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2348 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2349 | if (session->state != ISCSI_STATE_LOGGED_IN) { |
| 2350 | session->state = ISCSI_STATE_RECOVERY_FAILED; |
| 2351 | if (session->leadconn) |
| 2352 | wake_up(&session->leadconn->ehwait); |
| 2353 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2354 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2355 | } |
| 2356 | EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout); |
| 2357 | |
| 2358 | /** |
| 2359 | * iscsi_eh_session_reset - drop session and attempt relogin |
| 2360 | * @sc: scsi command |
| 2361 | * |
| 2362 | * This function will wait for a relogin, session termination from |
| 2363 | * userspace, or a recovery/replacement timeout. |
| 2364 | */ |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2365 | int iscsi_eh_session_reset(struct scsi_cmnd *sc) |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2366 | { |
| 2367 | struct iscsi_cls_session *cls_session; |
| 2368 | struct iscsi_session *session; |
| 2369 | struct iscsi_conn *conn; |
| 2370 | |
| 2371 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2372 | session = cls_session->dd_data; |
| 2373 | conn = session->leadconn; |
| 2374 | |
| 2375 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2376 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2377 | if (session->state == ISCSI_STATE_TERMINATE) { |
| 2378 | failed: |
| 2379 | ISCSI_DBG_EH(session, |
| 2380 | "failing session reset: Could not log back into " |
| 2381 | "%s, %s [age %d]\n", session->targetname, |
| 2382 | conn->persistent_address, session->age); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2383 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2384 | mutex_unlock(&session->eh_mutex); |
| 2385 | return FAILED; |
| 2386 | } |
| 2387 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2388 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2389 | mutex_unlock(&session->eh_mutex); |
| 2390 | /* |
| 2391 | * we drop the lock here but the leadconn cannot be destoyed while |
| 2392 | * we are in the scsi eh |
| 2393 | */ |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2394 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2395 | |
| 2396 | ISCSI_DBG_EH(session, "wait for relogin\n"); |
| 2397 | wait_event_interruptible(conn->ehwait, |
| 2398 | session->state == ISCSI_STATE_TERMINATE || |
| 2399 | session->state == ISCSI_STATE_LOGGED_IN || |
| 2400 | session->state == ISCSI_STATE_RECOVERY_FAILED); |
| 2401 | if (signal_pending(current)) |
| 2402 | flush_signals(current); |
| 2403 | |
| 2404 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2405 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2406 | if (session->state == ISCSI_STATE_LOGGED_IN) { |
| 2407 | ISCSI_DBG_EH(session, |
| 2408 | "session reset succeeded for %s,%s\n", |
| 2409 | session->targetname, conn->persistent_address); |
| 2410 | } else |
| 2411 | goto failed; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2412 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2413 | mutex_unlock(&session->eh_mutex); |
| 2414 | return SUCCESS; |
| 2415 | } |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2416 | EXPORT_SYMBOL_GPL(iscsi_eh_session_reset); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2417 | |
| 2418 | static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) |
| 2419 | { |
| 2420 | memset(hdr, 0, sizeof(*hdr)); |
| 2421 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE; |
| 2422 | hdr->flags = ISCSI_TM_FUNC_TARGET_WARM_RESET & ISCSI_FLAG_TM_FUNC_MASK; |
| 2423 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
| 2424 | hdr->rtt = RESERVED_ITT; |
| 2425 | } |
| 2426 | |
| 2427 | /** |
| 2428 | * iscsi_eh_target_reset - reset target |
| 2429 | * @sc: scsi command |
| 2430 | * |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2431 | * This will attempt to send a warm target reset. |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2432 | */ |
| 2433 | int iscsi_eh_target_reset(struct scsi_cmnd *sc) |
| 2434 | { |
| 2435 | struct iscsi_cls_session *cls_session; |
| 2436 | struct iscsi_session *session; |
| 2437 | struct iscsi_conn *conn; |
| 2438 | struct iscsi_tm *hdr; |
| 2439 | int rc = FAILED; |
| 2440 | |
| 2441 | cls_session = starget_to_session(scsi_target(sc->device)); |
| 2442 | session = cls_session->dd_data; |
| 2443 | |
| 2444 | ISCSI_DBG_EH(session, "tgt Reset [sc %p tgt %s]\n", sc, |
| 2445 | session->targetname); |
| 2446 | |
| 2447 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2448 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2449 | /* |
| 2450 | * Just check if we are not logged in. We cannot check for |
| 2451 | * the phase because the reset could come from a ioctl. |
| 2452 | */ |
| 2453 | if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN) |
| 2454 | goto unlock; |
| 2455 | conn = session->leadconn; |
| 2456 | |
| 2457 | /* only have one tmf outstanding at a time */ |
| 2458 | if (conn->tmf_state != TMF_INITIAL) |
| 2459 | goto unlock; |
| 2460 | conn->tmf_state = TMF_QUEUED; |
| 2461 | |
| 2462 | hdr = &conn->tmhdr; |
| 2463 | iscsi_prep_tgt_reset_pdu(sc, hdr); |
| 2464 | |
| 2465 | if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age, |
| 2466 | session->tgt_reset_timeout)) { |
| 2467 | rc = FAILED; |
| 2468 | goto unlock; |
| 2469 | } |
| 2470 | |
| 2471 | switch (conn->tmf_state) { |
| 2472 | case TMF_SUCCESS: |
| 2473 | break; |
| 2474 | case TMF_TIMEDOUT: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2475 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | df4da5c | 2010-12-31 02:22:18 -0600 | [diff] [blame] | 2476 | iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2477 | goto done; |
| 2478 | default: |
| 2479 | conn->tmf_state = TMF_INITIAL; |
| 2480 | goto unlock; |
| 2481 | } |
| 2482 | |
| 2483 | rc = SUCCESS; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2484 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2485 | |
| 2486 | iscsi_suspend_tx(conn); |
| 2487 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2488 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2489 | memset(hdr, 0, sizeof(*hdr)); |
| 2490 | fail_scsi_tasks(conn, -1, DID_ERROR); |
| 2491 | conn->tmf_state = TMF_INITIAL; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2492 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2493 | |
| 2494 | iscsi_start_tx(conn); |
| 2495 | goto done; |
| 2496 | |
| 2497 | unlock: |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2498 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2499 | done: |
| 2500 | ISCSI_DBG_EH(session, "tgt %s reset result = %s\n", session->targetname, |
| 2501 | rc == SUCCESS ? "SUCCESS" : "FAILED"); |
| 2502 | mutex_unlock(&session->eh_mutex); |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2503 | return rc; |
| 2504 | } |
| 2505 | EXPORT_SYMBOL_GPL(iscsi_eh_target_reset); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2506 | |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2507 | /** |
| 2508 | * iscsi_eh_recover_target - reset target and possibly the session |
| 2509 | * @sc: scsi command |
| 2510 | * |
| 2511 | * This will attempt to send a warm target reset. If that fails, |
| 2512 | * we will escalate to ERL0 session recovery. |
| 2513 | */ |
| 2514 | int iscsi_eh_recover_target(struct scsi_cmnd *sc) |
| 2515 | { |
| 2516 | int rc; |
| 2517 | |
| 2518 | rc = iscsi_eh_target_reset(sc); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2519 | if (rc == FAILED) |
| 2520 | rc = iscsi_eh_session_reset(sc); |
| 2521 | return rc; |
| 2522 | } |
Jayamohan Kallickal | 309ce15 | 2010-02-20 08:02:10 +0530 | [diff] [blame] | 2523 | EXPORT_SYMBOL_GPL(iscsi_eh_recover_target); |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2524 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2525 | /* |
| 2526 | * Pre-allocate a pool of @max items of @item_size. By default, the pool |
| 2527 | * should be accessed via kfifo_{get,put} on q->queue. |
| 2528 | * Optionally, the caller can obtain the array of object pointers |
| 2529 | * by passing in a non-NULL @items pointer |
| 2530 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2531 | int |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2532 | 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] | 2533 | { |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2534 | int i, num_arrays = 1; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2535 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2536 | memset(q, 0, sizeof(*q)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2537 | |
| 2538 | q->max = max; |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2539 | |
| 2540 | /* If the user passed an items pointer, he wants a copy of |
| 2541 | * the array. */ |
| 2542 | if (items) |
| 2543 | num_arrays++; |
| 2544 | q->pool = kzalloc(num_arrays * max * sizeof(void*), GFP_KERNEL); |
| 2545 | if (q->pool == NULL) |
Jean Delvare | f474a37 | 2009-03-05 14:45:55 -0600 | [diff] [blame] | 2546 | return -ENOMEM; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2547 | |
Stefani Seibold | c1e13f2 | 2009-12-21 14:37:27 -0800 | [diff] [blame] | 2548 | kfifo_init(&q->queue, (void*)q->pool, max * sizeof(void*)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2549 | |
| 2550 | for (i = 0; i < max; i++) { |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2551 | q->pool[i] = kzalloc(item_size, GFP_KERNEL); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2552 | if (q->pool[i] == NULL) { |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2553 | q->max = i; |
| 2554 | goto enomem; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2555 | } |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2556 | kfifo_in(&q->queue, (void*)&q->pool[i], sizeof(void*)); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2557 | } |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2558 | |
| 2559 | if (items) { |
| 2560 | *items = q->pool + max; |
| 2561 | memcpy(*items, q->pool, max * sizeof(void *)); |
| 2562 | } |
| 2563 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2564 | return 0; |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2565 | |
| 2566 | enomem: |
| 2567 | iscsi_pool_free(q); |
| 2568 | return -ENOMEM; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2569 | } |
| 2570 | EXPORT_SYMBOL_GPL(iscsi_pool_init); |
| 2571 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2572 | void iscsi_pool_free(struct iscsi_pool *q) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2573 | { |
| 2574 | int i; |
| 2575 | |
| 2576 | for (i = 0; i < q->max; i++) |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2577 | kfree(q->pool[i]); |
Jean Delvare | f474a37 | 2009-03-05 14:45:55 -0600 | [diff] [blame] | 2578 | kfree(q->pool); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2579 | } |
| 2580 | EXPORT_SYMBOL_GPL(iscsi_pool_free); |
| 2581 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2582 | /** |
| 2583 | * iscsi_host_add - add host to system |
| 2584 | * @shost: scsi host |
| 2585 | * @pdev: parent device |
| 2586 | * |
| 2587 | * This should be called by partial offload and software iscsi drivers |
| 2588 | * to add a host to the system. |
| 2589 | */ |
| 2590 | int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2591 | { |
Mike Christie | 8e9a20c | 2008-06-16 10:11:33 -0500 | [diff] [blame] | 2592 | if (!shost->can_queue) |
| 2593 | shost->can_queue = ISCSI_DEF_XMIT_CMDS_MAX; |
| 2594 | |
Mike Christie | 4d10835 | 2009-03-05 14:46:04 -0600 | [diff] [blame] | 2595 | if (!shost->cmd_per_lun) |
| 2596 | shost->cmd_per_lun = ISCSI_DEF_CMD_PER_LUN; |
| 2597 | |
Mike Christie | 308cec1 | 2009-02-06 12:06:20 -0600 | [diff] [blame] | 2598 | if (!shost->transportt->eh_timed_out) |
| 2599 | shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2600 | return scsi_add_host(shost, pdev); |
| 2601 | } |
| 2602 | EXPORT_SYMBOL_GPL(iscsi_host_add); |
| 2603 | |
| 2604 | /** |
| 2605 | * iscsi_host_alloc - allocate a host and driver data |
| 2606 | * @sht: scsi host template |
| 2607 | * @dd_data_size: driver host data size |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2608 | * @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] | 2609 | * |
| 2610 | * This should be called by partial offload and software iscsi drivers. |
| 2611 | * To access the driver specific memory use the iscsi_host_priv() macro. |
| 2612 | */ |
| 2613 | struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, |
Mike Christie | 4d10835 | 2009-03-05 14:46:04 -0600 | [diff] [blame] | 2614 | int dd_data_size, bool xmit_can_sleep) |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2615 | { |
| 2616 | struct Scsi_Host *shost; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2617 | struct iscsi_host *ihost; |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2618 | |
| 2619 | shost = scsi_host_alloc(sht, sizeof(struct iscsi_host) + dd_data_size); |
| 2620 | if (!shost) |
| 2621 | return NULL; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2622 | ihost = shost_priv(shost); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2623 | |
| 2624 | if (xmit_can_sleep) { |
| 2625 | snprintf(ihost->workq_name, sizeof(ihost->workq_name), |
| 2626 | "iscsi_q_%d", shost->host_no); |
| 2627 | ihost->workq = create_singlethread_workqueue(ihost->workq_name); |
| 2628 | if (!ihost->workq) |
| 2629 | goto free_host; |
| 2630 | } |
| 2631 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2632 | spin_lock_init(&ihost->lock); |
| 2633 | ihost->state = ISCSI_HOST_SETUP; |
| 2634 | ihost->num_sessions = 0; |
| 2635 | init_waitqueue_head(&ihost->session_removal_wq); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2636 | return shost; |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2637 | |
| 2638 | free_host: |
| 2639 | scsi_host_put(shost); |
| 2640 | return NULL; |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2641 | } |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2642 | EXPORT_SYMBOL_GPL(iscsi_host_alloc); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2643 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2644 | static void iscsi_notify_host_removed(struct iscsi_cls_session *cls_session) |
| 2645 | { |
Mike Christie | 40a06e7 | 2009-03-05 14:46:05 -0600 | [diff] [blame] | 2646 | iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_INVALID_HOST); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2647 | } |
| 2648 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2649 | /** |
| 2650 | * iscsi_host_remove - remove host and sessions |
| 2651 | * @shost: scsi host |
| 2652 | * |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2653 | * If there are any sessions left, this will initiate the removal and wait |
| 2654 | * for the completion. |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2655 | */ |
| 2656 | void iscsi_host_remove(struct Scsi_Host *shost) |
| 2657 | { |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2658 | struct iscsi_host *ihost = shost_priv(shost); |
| 2659 | unsigned long flags; |
| 2660 | |
| 2661 | spin_lock_irqsave(&ihost->lock, flags); |
| 2662 | ihost->state = ISCSI_HOST_REMOVED; |
| 2663 | spin_unlock_irqrestore(&ihost->lock, flags); |
| 2664 | |
| 2665 | iscsi_host_for_each_session(shost, iscsi_notify_host_removed); |
| 2666 | wait_event_interruptible(ihost->session_removal_wq, |
| 2667 | ihost->num_sessions == 0); |
| 2668 | if (signal_pending(current)) |
| 2669 | flush_signals(current); |
| 2670 | |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2671 | scsi_remove_host(shost); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 2672 | if (ihost->workq) |
| 2673 | destroy_workqueue(ihost->workq); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2674 | } |
| 2675 | EXPORT_SYMBOL_GPL(iscsi_host_remove); |
| 2676 | |
| 2677 | void iscsi_host_free(struct Scsi_Host *shost) |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2678 | { |
| 2679 | struct iscsi_host *ihost = shost_priv(shost); |
| 2680 | |
| 2681 | kfree(ihost->netdev); |
| 2682 | kfree(ihost->hwaddress); |
| 2683 | kfree(ihost->initiatorname); |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2684 | scsi_host_put(shost); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2685 | } |
Mike Christie | a4804cd | 2008-05-21 15:54:00 -0500 | [diff] [blame] | 2686 | EXPORT_SYMBOL_GPL(iscsi_host_free); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2687 | |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2688 | static void iscsi_host_dec_session_cnt(struct Scsi_Host *shost) |
| 2689 | { |
| 2690 | struct iscsi_host *ihost = shost_priv(shost); |
| 2691 | unsigned long flags; |
| 2692 | |
| 2693 | shost = scsi_host_get(shost); |
| 2694 | if (!shost) { |
| 2695 | printk(KERN_ERR "Invalid state. Cannot notify host removal " |
| 2696 | "of session teardown event because host already " |
| 2697 | "removed.\n"); |
| 2698 | return; |
| 2699 | } |
| 2700 | |
| 2701 | spin_lock_irqsave(&ihost->lock, flags); |
| 2702 | ihost->num_sessions--; |
| 2703 | if (ihost->num_sessions == 0) |
| 2704 | wake_up(&ihost->session_removal_wq); |
| 2705 | spin_unlock_irqrestore(&ihost->lock, flags); |
| 2706 | scsi_host_put(shost); |
| 2707 | } |
| 2708 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2709 | /** |
| 2710 | * iscsi_session_setup - create iscsi cls session and host and session |
| 2711 | * @iscsit: iscsi transport template |
| 2712 | * @shost: scsi host |
| 2713 | * @cmds_max: session can queue |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2714 | * @cmd_task_size: LLD task private data size |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2715 | * @initial_cmdsn: initial CmdSN |
| 2716 | * |
| 2717 | * This can be used by software iscsi_transports that allocate |
| 2718 | * a session per scsi host. |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2719 | * |
| 2720 | * Callers should set cmds_max to the largest total numer (mgmt + scsi) of |
| 2721 | * tasks they support. The iscsi layer reserves ISCSI_MGMT_CMDS_MAX tasks |
| 2722 | * for nop handling and login/logout requests. |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2723 | */ |
| 2724 | struct iscsi_cls_session * |
| 2725 | iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost, |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 2726 | uint16_t cmds_max, int dd_size, int cmd_task_size, |
Mike Christie | 7970634 | 2008-05-21 15:54:12 -0500 | [diff] [blame] | 2727 | uint32_t initial_cmdsn, unsigned int id) |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2728 | { |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2729 | struct iscsi_host *ihost = shost_priv(shost); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2730 | struct iscsi_session *session; |
| 2731 | struct iscsi_cls_session *cls_session; |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2732 | int cmd_i, scsi_cmds, total_cmds = cmds_max; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2733 | unsigned long flags; |
| 2734 | |
| 2735 | spin_lock_irqsave(&ihost->lock, flags); |
| 2736 | if (ihost->state == ISCSI_HOST_REMOVED) { |
| 2737 | spin_unlock_irqrestore(&ihost->lock, flags); |
| 2738 | return NULL; |
| 2739 | } |
| 2740 | ihost->num_sessions++; |
| 2741 | spin_unlock_irqrestore(&ihost->lock, flags); |
Mike Christie | 8e9a20c | 2008-06-16 10:11:33 -0500 | [diff] [blame] | 2742 | |
| 2743 | if (!total_cmds) |
| 2744 | total_cmds = ISCSI_DEF_XMIT_CMDS_MAX; |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 2745 | /* |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2746 | * The iscsi layer needs some tasks for nop handling and tmfs, |
| 2747 | * so the cmds_max must at least be greater than ISCSI_MGMT_CMDS_MAX |
| 2748 | * + 1 command for scsi IO. |
Mike Christie | 3e5c28a | 2008-05-21 15:54:06 -0500 | [diff] [blame] | 2749 | */ |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2750 | if (total_cmds < ISCSI_TOTAL_CMDS_MIN) { |
| 2751 | printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " |
| 2752 | "must be a power of two that is at least %d.\n", |
| 2753 | total_cmds, ISCSI_TOTAL_CMDS_MIN); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2754 | goto dec_session_count; |
Mike Christie | 1548271 | 2007-05-30 12:57:19 -0500 | [diff] [blame] | 2755 | } |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2756 | |
| 2757 | if (total_cmds > ISCSI_TOTAL_CMDS_MAX) { |
| 2758 | printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " |
| 2759 | "must be a power of 2 less than or equal to %d.\n", |
| 2760 | cmds_max, ISCSI_TOTAL_CMDS_MAX); |
| 2761 | total_cmds = ISCSI_TOTAL_CMDS_MAX; |
| 2762 | } |
| 2763 | |
| 2764 | if (!is_power_of_2(total_cmds)) { |
| 2765 | printk(KERN_ERR "iscsi: invalid can_queue of %d. can_queue " |
| 2766 | "must be a power of 2.\n", total_cmds); |
| 2767 | total_cmds = rounddown_pow_of_two(total_cmds); |
| 2768 | if (total_cmds < ISCSI_TOTAL_CMDS_MIN) |
| 2769 | return NULL; |
| 2770 | printk(KERN_INFO "iscsi: Rounding can_queue to %d.\n", |
| 2771 | total_cmds); |
| 2772 | } |
| 2773 | scsi_cmds = total_cmds - ISCSI_MGMT_CMDS_MAX; |
Mike Christie | 1548271 | 2007-05-30 12:57:19 -0500 | [diff] [blame] | 2774 | |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2775 | cls_session = iscsi_alloc_session(shost, iscsit, |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 2776 | sizeof(struct iscsi_session) + |
| 2777 | dd_size); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2778 | if (!cls_session) |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2779 | goto dec_session_count; |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2780 | session = cls_session->dd_data; |
| 2781 | session->cls_session = cls_session; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2782 | session->host = shost; |
| 2783 | session->state = ISCSI_STATE_FREE; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2784 | session->fast_abort = 1; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 2785 | session->tgt_reset_timeout = 30; |
Mike Christie | 4cd49ea | 2007-12-13 12:43:38 -0600 | [diff] [blame] | 2786 | session->lu_reset_timeout = 15; |
| 2787 | session->abort_timeout = 10; |
Mike Christie | 3cf7b23 | 2008-05-21 15:54:17 -0500 | [diff] [blame] | 2788 | session->scsi_cmds_max = scsi_cmds; |
| 2789 | session->cmds_max = total_cmds; |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 2790 | session->queued_cmdsn = session->cmdsn = initial_cmdsn; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2791 | session->exp_cmdsn = initial_cmdsn + 1; |
| 2792 | session->max_cmdsn = initial_cmdsn + 1; |
| 2793 | session->max_r2t = 1; |
| 2794 | session->tt = iscsit; |
Jayamohan Kallickal | b8b9e1b8 | 2009-09-22 08:21:22 +0530 | [diff] [blame] | 2795 | session->dd_data = cls_session->dd_data + sizeof(*session); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2796 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 2797 | mutex_init(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2798 | spin_lock_init(&session->frwd_lock); |
| 2799 | spin_lock_init(&session->back_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2800 | |
| 2801 | /* initialize SCSI PDU commands pool */ |
| 2802 | if (iscsi_pool_init(&session->cmdpool, session->cmds_max, |
| 2803 | (void***)&session->cmds, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2804 | cmd_task_size + sizeof(struct iscsi_task))) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2805 | goto cmdpool_alloc_fail; |
| 2806 | |
| 2807 | /* pre-format cmds pool with ITT */ |
| 2808 | for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) { |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2809 | struct iscsi_task *task = session->cmds[cmd_i]; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2810 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2811 | if (cmd_task_size) |
| 2812 | task->dd_data = &task[1]; |
| 2813 | task->itt = cmd_i; |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 2814 | task->state = ISCSI_TASK_FREE; |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2815 | INIT_LIST_HEAD(&task->running); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2816 | } |
| 2817 | |
Mike Christie | f53a88d | 2006-06-28 12:00:27 -0500 | [diff] [blame] | 2818 | if (!try_module_get(iscsit->owner)) |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2819 | goto module_get_fail; |
| 2820 | |
Mike Christie | 7970634 | 2008-05-21 15:54:12 -0500 | [diff] [blame] | 2821 | if (iscsi_add_session(cls_session, id)) |
Mike Christie | f53a88d | 2006-06-28 12:00:27 -0500 | [diff] [blame] | 2822 | goto cls_session_fail; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2823 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2824 | return cls_session; |
| 2825 | |
| 2826 | cls_session_fail: |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2827 | module_put(iscsit->owner); |
| 2828 | module_get_fail: |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2829 | iscsi_pool_free(&session->cmdpool); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2830 | cmdpool_alloc_fail: |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2831 | iscsi_free_session(cls_session); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2832 | dec_session_count: |
| 2833 | iscsi_host_dec_session_cnt(shost); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2834 | return NULL; |
| 2835 | } |
| 2836 | EXPORT_SYMBOL_GPL(iscsi_session_setup); |
| 2837 | |
| 2838 | /** |
| 2839 | * iscsi_session_teardown - destroy session, host, and cls_session |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2840 | * @cls_session: iscsi session |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2841 | * |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2842 | * The driver must have called iscsi_remove_session before |
| 2843 | * calling this. |
| 2844 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2845 | void iscsi_session_teardown(struct iscsi_cls_session *cls_session) |
| 2846 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2847 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | 63f75cc | 2006-07-24 15:47:29 -0500 | [diff] [blame] | 2848 | struct module *owner = cls_session->transport->owner; |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2849 | struct Scsi_Host *shost = session->host; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2850 | |
Olaf Kirch | 6320377 | 2007-12-13 12:43:25 -0600 | [diff] [blame] | 2851 | iscsi_pool_free(&session->cmdpool); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2852 | |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 2853 | kfree(session->password); |
| 2854 | kfree(session->password_in); |
| 2855 | kfree(session->username); |
| 2856 | kfree(session->username_in); |
Mike Christie | f3ff0c3 | 2006-07-24 15:47:50 -0500 | [diff] [blame] | 2857 | kfree(session->targetname); |
Vikas Chaudhary | 3c5c480 | 2012-01-19 03:06:53 -0800 | [diff] [blame] | 2858 | kfree(session->targetalias); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 2859 | kfree(session->initiatorname); |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 2860 | kfree(session->boot_root); |
| 2861 | kfree(session->boot_nic); |
| 2862 | kfree(session->boot_target); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 2863 | kfree(session->ifacename); |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 2864 | kfree(session->portal_type); |
| 2865 | kfree(session->discovery_parent_type); |
Mike Christie | f3ff0c3 | 2006-07-24 15:47:50 -0500 | [diff] [blame] | 2866 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2867 | iscsi_destroy_session(cls_session); |
Mike Christie | e5bd7b5 | 2008-09-24 11:46:10 -0500 | [diff] [blame] | 2868 | iscsi_host_dec_session_cnt(shost); |
Mike Christie | 63f75cc | 2006-07-24 15:47:29 -0500 | [diff] [blame] | 2869 | module_put(owner); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2870 | } |
| 2871 | EXPORT_SYMBOL_GPL(iscsi_session_teardown); |
| 2872 | |
| 2873 | /** |
| 2874 | * iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn |
| 2875 | * @cls_session: iscsi_cls_session |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2876 | * @dd_size: private driver data size |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2877 | * @conn_idx: cid |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2878 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2879 | struct iscsi_cls_conn * |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2880 | iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size, |
| 2881 | uint32_t conn_idx) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2882 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 2883 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2884 | struct iscsi_conn *conn; |
| 2885 | struct iscsi_cls_conn *cls_conn; |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2886 | char *data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2887 | |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2888 | cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size, |
| 2889 | conn_idx); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2890 | if (!cls_conn) |
| 2891 | return NULL; |
| 2892 | conn = cls_conn->dd_data; |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2893 | memset(conn, 0, sizeof(*conn) + dd_size); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2894 | |
Mike Christie | 5d91e20 | 2008-05-21 15:54:01 -0500 | [diff] [blame] | 2895 | conn->dd_data = cls_conn->dd_data + sizeof(*conn); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2896 | conn->session = session; |
| 2897 | conn->cls_conn = cls_conn; |
| 2898 | conn->c_stage = ISCSI_CONN_INITIAL_STAGE; |
| 2899 | conn->id = conn_idx; |
| 2900 | conn->exp_statsn = 0; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2901 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2902 | |
| 2903 | init_timer(&conn->transport_timer); |
| 2904 | conn->transport_timer.data = (unsigned long)conn; |
| 2905 | conn->transport_timer.function = iscsi_check_transport_timeouts; |
| 2906 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2907 | INIT_LIST_HEAD(&conn->mgmtqueue); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 2908 | INIT_LIST_HEAD(&conn->cmdqueue); |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2909 | INIT_LIST_HEAD(&conn->requeue); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2910 | INIT_WORK(&conn->xmitwork, iscsi_xmitworker); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2911 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2912 | /* allocate login_task used for the login/text sequences */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2913 | spin_lock_bh(&session->frwd_lock); |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2914 | if (!kfifo_out(&session->cmdpool.queue, |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2915 | (void*)&conn->login_task, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2916 | sizeof(void*))) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2917 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2918 | goto login_task_alloc_fail; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2919 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2920 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2921 | |
Mike Christie | cfeb2cf | 2008-12-02 00:32:09 -0600 | [diff] [blame] | 2922 | data = (char *) __get_free_pages(GFP_KERNEL, |
| 2923 | get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2924 | if (!data) |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2925 | goto login_task_data_alloc_fail; |
| 2926 | conn->login_task->data = conn->data = data; |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2927 | |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2928 | init_timer(&conn->tmf_timer); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2929 | init_waitqueue_head(&conn->ehwait); |
| 2930 | |
| 2931 | return cls_conn; |
| 2932 | |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2933 | login_task_data_alloc_fail: |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 2934 | kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task, |
Mike Christie | d36ab6f | 2006-05-18 20:31:34 -0500 | [diff] [blame] | 2935 | sizeof(void*)); |
Mike Christie | 9c19a7d | 2008-05-21 15:54:09 -0500 | [diff] [blame] | 2936 | login_task_alloc_fail: |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2937 | iscsi_destroy_conn(cls_conn); |
| 2938 | return NULL; |
| 2939 | } |
| 2940 | EXPORT_SYMBOL_GPL(iscsi_conn_setup); |
| 2941 | |
| 2942 | /** |
| 2943 | * iscsi_conn_teardown - teardown iscsi connection |
| 2944 | * cls_conn: iscsi class connection |
| 2945 | * |
| 2946 | * TODO: we may need to make this into a two step process |
| 2947 | * like scsi-mls remove + put host |
| 2948 | */ |
| 2949 | void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn) |
| 2950 | { |
| 2951 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 2952 | struct iscsi_session *session = conn->session; |
| 2953 | unsigned long flags; |
| 2954 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 2955 | del_timer_sync(&conn->transport_timer); |
| 2956 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2957 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2958 | conn->c_stage = ISCSI_CONN_CLEANUP_WAIT; |
| 2959 | if (session->leadconn == conn) { |
| 2960 | /* |
| 2961 | * leading connection? then give up on recovery. |
| 2962 | */ |
| 2963 | session->state = ISCSI_STATE_TERMINATE; |
| 2964 | wake_up(&conn->ehwait); |
| 2965 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2966 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2967 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2968 | /* |
| 2969 | * Block until all in-progress commands for this connection |
| 2970 | * time out or fail. |
| 2971 | */ |
| 2972 | for (;;) { |
| 2973 | spin_lock_irqsave(session->host->host_lock, flags); |
| 2974 | if (!session->host->host_busy) { /* OK for ERL == 0 */ |
| 2975 | spin_unlock_irqrestore(session->host->host_lock, flags); |
| 2976 | break; |
| 2977 | } |
| 2978 | spin_unlock_irqrestore(session->host->host_lock, flags); |
| 2979 | msleep_interruptible(500); |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 2980 | iscsi_conn_printk(KERN_INFO, conn, "iscsi conn_destroy(): " |
| 2981 | "host_busy %d host_failed %d\n", |
| 2982 | session->host->host_busy, |
| 2983 | session->host->host_failed); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 2984 | /* |
| 2985 | * force eh_abort() to unblock |
| 2986 | */ |
| 2987 | wake_up(&conn->ehwait); |
| 2988 | } |
| 2989 | |
Mike Christie | 779ea12 | 2007-02-28 17:32:15 -0600 | [diff] [blame] | 2990 | /* flush queued up work because we free the connection below */ |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 2991 | iscsi_suspend_tx(conn); |
Mike Christie | 779ea12 | 2007-02-28 17:32:15 -0600 | [diff] [blame] | 2992 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2993 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | cfeb2cf | 2008-12-02 00:32:09 -0600 | [diff] [blame] | 2994 | free_pages((unsigned long) conn->data, |
| 2995 | get_order(ISCSI_DEF_MAX_RECV_SEG_LEN)); |
Mike Christie | f3ff0c3 | 2006-07-24 15:47:50 -0500 | [diff] [blame] | 2996 | kfree(conn->persistent_address); |
Adheer Chandravanshi | ae56ff4 | 2013-11-22 05:28:21 -0500 | [diff] [blame] | 2997 | kfree(conn->local_ipaddr); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 2998 | /* regular RX path uses back_lock */ |
| 2999 | spin_lock_bh(&session->back_lock); |
Stefani Seibold | 7acd72e | 2009-12-21 14:37:28 -0800 | [diff] [blame] | 3000 | kfifo_in(&session->cmdpool.queue, (void*)&conn->login_task, |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3001 | sizeof(void*)); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3002 | spin_unlock_bh(&session->back_lock); |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 3003 | if (session->leadconn == conn) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3004 | session->leadconn = NULL; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3005 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3006 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3007 | iscsi_destroy_conn(cls_conn); |
| 3008 | } |
| 3009 | EXPORT_SYMBOL_GPL(iscsi_conn_teardown); |
| 3010 | |
| 3011 | int iscsi_conn_start(struct iscsi_cls_conn *cls_conn) |
| 3012 | { |
| 3013 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3014 | struct iscsi_session *session = conn->session; |
| 3015 | |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 3016 | if (!session) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3017 | iscsi_conn_printk(KERN_ERR, conn, |
| 3018 | "can't start unbound connection\n"); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3019 | return -EPERM; |
| 3020 | } |
| 3021 | |
Mike Christie | db98ccd | 2006-08-31 18:09:31 -0400 | [diff] [blame] | 3022 | if ((session->imm_data_en || !session->initial_r2t_en) && |
| 3023 | session->first_burst > session->max_burst) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3024 | iscsi_conn_printk(KERN_INFO, conn, "invalid burst lengths: " |
| 3025 | "first_burst %d max_burst %d\n", |
| 3026 | session->first_burst, session->max_burst); |
Mike Christie | ffd0436 | 2006-08-31 18:09:24 -0400 | [diff] [blame] | 3027 | return -EINVAL; |
| 3028 | } |
| 3029 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3030 | if (conn->ping_timeout && !conn->recv_timeout) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3031 | iscsi_conn_printk(KERN_ERR, conn, "invalid recv timeout of " |
| 3032 | "zero. Using 5 seconds\n."); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3033 | conn->recv_timeout = 5; |
| 3034 | } |
| 3035 | |
| 3036 | if (conn->recv_timeout && !conn->ping_timeout) { |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3037 | iscsi_conn_printk(KERN_ERR, conn, "invalid ping timeout of " |
| 3038 | "zero. Using 5 seconds.\n"); |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3039 | conn->ping_timeout = 5; |
| 3040 | } |
| 3041 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3042 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3043 | conn->c_stage = ISCSI_CONN_STARTED; |
| 3044 | session->state = ISCSI_STATE_LOGGED_IN; |
Mike Christie | e072640 | 2007-07-26 12:46:48 -0500 | [diff] [blame] | 3045 | session->queued_cmdsn = session->cmdsn; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3046 | |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3047 | conn->last_recv = jiffies; |
| 3048 | conn->last_ping = jiffies; |
| 3049 | if (conn->recv_timeout && conn->ping_timeout) |
| 3050 | mod_timer(&conn->transport_timer, |
| 3051 | jiffies + (conn->recv_timeout * HZ)); |
| 3052 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3053 | switch(conn->stop_stage) { |
| 3054 | case STOP_CONN_RECOVER: |
| 3055 | /* |
| 3056 | * unblock eh_abort() if it is blocked. re-try all |
| 3057 | * commands after successful recovery |
| 3058 | */ |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3059 | conn->stop_stage = 0; |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 3060 | conn->tmf_state = TMF_INITIAL; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3061 | session->age++; |
Mike Christie | 8b1d034 | 2008-01-31 13:36:53 -0600 | [diff] [blame] | 3062 | if (session->age == 16) |
| 3063 | session->age = 0; |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 3064 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3065 | case STOP_CONN_TERM: |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3066 | conn->stop_stage = 0; |
| 3067 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3068 | default: |
| 3069 | break; |
| 3070 | } |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3071 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3072 | |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3073 | iscsi_unblock_session(session->cls_session); |
Mike Christie | 6eabafb | 2008-01-31 13:36:43 -0600 | [diff] [blame] | 3074 | wake_up(&conn->ehwait); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3075 | return 0; |
| 3076 | } |
| 3077 | EXPORT_SYMBOL_GPL(iscsi_conn_start); |
| 3078 | |
| 3079 | static void |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3080 | fail_mgmt_tasks(struct iscsi_session *session, struct iscsi_conn *conn) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3081 | { |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3082 | struct iscsi_task *task; |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 3083 | int i, state; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3084 | |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3085 | for (i = 0; i < conn->session->cmds_max; i++) { |
| 3086 | task = conn->session->cmds[i]; |
| 3087 | if (task->sc) |
| 3088 | continue; |
| 3089 | |
| 3090 | if (task->state == ISCSI_TASK_FREE) |
| 3091 | continue; |
| 3092 | |
| 3093 | ISCSI_DBG_SESSION(conn->session, |
| 3094 | "failing mgmt itt 0x%x state %d\n", |
| 3095 | task->itt, task->state); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 3096 | state = ISCSI_TASK_ABRT_SESS_RECOV; |
| 3097 | if (task->state == ISCSI_TASK_PENDING) |
| 3098 | state = ISCSI_TASK_COMPLETED; |
| 3099 | iscsi_complete_task(task, state); |
| 3100 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3101 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3102 | } |
| 3103 | |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3104 | static void iscsi_start_session_recovery(struct iscsi_session *session, |
| 3105 | struct iscsi_conn *conn, int flag) |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3106 | { |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3107 | int old_stop_stage; |
| 3108 | |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3109 | mutex_lock(&session->eh_mutex); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3110 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3111 | if (conn->stop_stage == STOP_CONN_TERM) { |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3112 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3113 | mutex_unlock(&session->eh_mutex); |
| 3114 | return; |
| 3115 | } |
| 3116 | |
| 3117 | /* |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3118 | * 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] | 3119 | * 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] | 3120 | * the recovery state again |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3121 | */ |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3122 | if (flag == STOP_CONN_TERM) |
| 3123 | session->state = ISCSI_STATE_TERMINATE; |
| 3124 | else if (conn->stop_stage != STOP_CONN_RECOVER) |
| 3125 | session->state = ISCSI_STATE_IN_RECOVERY; |
Mike Christie | 4ae0a6c | 2010-03-09 14:14:51 -0600 | [diff] [blame] | 3126 | |
| 3127 | old_stop_stage = conn->stop_stage; |
| 3128 | conn->stop_stage = flag; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3129 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | ed2abc7 | 2006-05-02 19:46:40 -0500 | [diff] [blame] | 3130 | |
Mike Christie | 26013ad | 2009-05-13 17:57:43 -0500 | [diff] [blame] | 3131 | del_timer_sync(&conn->transport_timer); |
| 3132 | iscsi_suspend_tx(conn); |
| 3133 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3134 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3135 | conn->c_stage = ISCSI_CONN_STOPPED; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3136 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3137 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3138 | /* |
| 3139 | * for connection level recovery we should not calculate |
| 3140 | * header digest. conn->hdr_size used for optimization |
| 3141 | * in hdr_extract() and will be re-negotiated at |
| 3142 | * set_param() time. |
| 3143 | */ |
| 3144 | if (flag == STOP_CONN_RECOVER) { |
| 3145 | conn->hdrdgst_en = 0; |
| 3146 | conn->datadgst_en = 0; |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3147 | if (session->state == ISCSI_STATE_IN_RECOVERY && |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3148 | old_stop_stage != STOP_CONN_RECOVER) { |
Mike Christie | 1b2c7af | 2009-03-05 14:45:58 -0600 | [diff] [blame] | 3149 | ISCSI_DBG_SESSION(session, "blocking session\n"); |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3150 | iscsi_block_session(session->cls_session); |
Mike Christie | 67a6111 | 2006-05-30 00:37:20 -0500 | [diff] [blame] | 3151 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3152 | } |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3153 | |
Mike Christie | 656cffc | 2006-05-18 20:31:42 -0500 | [diff] [blame] | 3154 | /* |
| 3155 | * flush queues. |
| 3156 | */ |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3157 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | b3cd505 | 2009-05-13 17:57:49 -0500 | [diff] [blame] | 3158 | fail_scsi_tasks(conn, -1, DID_TRANSPORT_DISRUPTED); |
Mike Christie | 3bbaaad | 2009-05-13 17:57:46 -0500 | [diff] [blame] | 3159 | fail_mgmt_tasks(session, conn); |
Mike Christie | 5d12c05 | 2009-11-11 16:34:32 -0600 | [diff] [blame] | 3160 | memset(&conn->tmhdr, 0, sizeof(conn->tmhdr)); |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3161 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 6724add | 2007-08-15 01:38:30 -0500 | [diff] [blame] | 3162 | mutex_unlock(&session->eh_mutex); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3163 | } |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3164 | |
| 3165 | void iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) |
| 3166 | { |
| 3167 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3168 | struct iscsi_session *session = conn->session; |
| 3169 | |
| 3170 | switch (flag) { |
| 3171 | case STOP_CONN_RECOVER: |
| 3172 | case STOP_CONN_TERM: |
| 3173 | iscsi_start_session_recovery(session, conn, flag); |
Mike Christie | 8d2860b | 2006-05-02 19:46:47 -0500 | [diff] [blame] | 3174 | break; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3175 | default: |
Mike Christie | 322d739 | 2008-01-31 13:36:52 -0600 | [diff] [blame] | 3176 | iscsi_conn_printk(KERN_ERR, conn, |
| 3177 | "invalid stop flag %d\n", flag); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3178 | } |
| 3179 | } |
| 3180 | EXPORT_SYMBOL_GPL(iscsi_conn_stop); |
| 3181 | |
| 3182 | int iscsi_conn_bind(struct iscsi_cls_session *cls_session, |
| 3183 | struct iscsi_cls_conn *cls_conn, int is_leading) |
| 3184 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3185 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | 9864404 | 2006-10-16 18:09:39 -0400 | [diff] [blame] | 3186 | struct iscsi_conn *conn = cls_conn->dd_data; |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3187 | |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3188 | spin_lock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3189 | if (is_leading) |
| 3190 | session->leadconn = conn; |
Shlomo Pongratz | 659743b | 2014-02-07 00:41:38 -0600 | [diff] [blame] | 3191 | spin_unlock_bh(&session->frwd_lock); |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3192 | |
| 3193 | /* |
| 3194 | * Unblock xmitworker(), Login Phase will pass through. |
| 3195 | */ |
| 3196 | clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |
| 3197 | clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); |
| 3198 | return 0; |
| 3199 | } |
| 3200 | EXPORT_SYMBOL_GPL(iscsi_conn_bind); |
| 3201 | |
Adheer Chandravanshi | adaf699 | 2013-03-22 07:41:30 -0400 | [diff] [blame] | 3202 | int iscsi_switch_str_param(char **param, char *new_val_buf) |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3203 | { |
| 3204 | char *new_val; |
| 3205 | |
| 3206 | if (*param) { |
| 3207 | if (!strcmp(*param, new_val_buf)) |
| 3208 | return 0; |
| 3209 | } |
| 3210 | |
| 3211 | new_val = kstrdup(new_val_buf, GFP_NOIO); |
| 3212 | if (!new_val) |
| 3213 | return -ENOMEM; |
| 3214 | |
| 3215 | kfree(*param); |
| 3216 | *param = new_val; |
| 3217 | return 0; |
| 3218 | } |
Adheer Chandravanshi | adaf699 | 2013-03-22 07:41:30 -0400 | [diff] [blame] | 3219 | EXPORT_SYMBOL_GPL(iscsi_switch_str_param); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3220 | |
| 3221 | int iscsi_set_param(struct iscsi_cls_conn *cls_conn, |
| 3222 | enum iscsi_param param, char *buf, int buflen) |
| 3223 | { |
| 3224 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3225 | struct iscsi_session *session = conn->session; |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 3226 | int val; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3227 | |
| 3228 | switch(param) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 3229 | case ISCSI_PARAM_FAST_ABORT: |
| 3230 | sscanf(buf, "%d", &session->fast_abort); |
| 3231 | break; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3232 | case ISCSI_PARAM_ABORT_TMO: |
| 3233 | sscanf(buf, "%d", &session->abort_timeout); |
| 3234 | break; |
| 3235 | case ISCSI_PARAM_LU_RESET_TMO: |
| 3236 | sscanf(buf, "%d", &session->lu_reset_timeout); |
| 3237 | break; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 3238 | case ISCSI_PARAM_TGT_RESET_TMO: |
| 3239 | sscanf(buf, "%d", &session->tgt_reset_timeout); |
| 3240 | break; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3241 | case ISCSI_PARAM_PING_TMO: |
| 3242 | sscanf(buf, "%d", &conn->ping_timeout); |
| 3243 | break; |
| 3244 | case ISCSI_PARAM_RECV_TMO: |
| 3245 | sscanf(buf, "%d", &conn->recv_timeout); |
| 3246 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3247 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| 3248 | sscanf(buf, "%d", &conn->max_recv_dlength); |
| 3249 | break; |
| 3250 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
| 3251 | sscanf(buf, "%d", &conn->max_xmit_dlength); |
| 3252 | break; |
| 3253 | case ISCSI_PARAM_HDRDGST_EN: |
| 3254 | sscanf(buf, "%d", &conn->hdrdgst_en); |
| 3255 | break; |
| 3256 | case ISCSI_PARAM_DATADGST_EN: |
| 3257 | sscanf(buf, "%d", &conn->datadgst_en); |
| 3258 | break; |
| 3259 | case ISCSI_PARAM_INITIAL_R2T_EN: |
| 3260 | sscanf(buf, "%d", &session->initial_r2t_en); |
| 3261 | break; |
| 3262 | case ISCSI_PARAM_MAX_R2T: |
Mike Christie | 1304be5 | 2012-01-26 21:13:10 -0600 | [diff] [blame] | 3263 | sscanf(buf, "%hu", &session->max_r2t); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3264 | break; |
| 3265 | case ISCSI_PARAM_IMM_DATA_EN: |
| 3266 | sscanf(buf, "%d", &session->imm_data_en); |
| 3267 | break; |
| 3268 | case ISCSI_PARAM_FIRST_BURST: |
| 3269 | sscanf(buf, "%d", &session->first_burst); |
| 3270 | break; |
| 3271 | case ISCSI_PARAM_MAX_BURST: |
| 3272 | sscanf(buf, "%d", &session->max_burst); |
| 3273 | break; |
| 3274 | case ISCSI_PARAM_PDU_INORDER_EN: |
| 3275 | sscanf(buf, "%d", &session->pdu_inorder_en); |
| 3276 | break; |
| 3277 | case ISCSI_PARAM_DATASEQ_INORDER_EN: |
| 3278 | sscanf(buf, "%d", &session->dataseq_inorder_en); |
| 3279 | break; |
| 3280 | case ISCSI_PARAM_ERL: |
| 3281 | sscanf(buf, "%d", &session->erl); |
| 3282 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3283 | case ISCSI_PARAM_EXP_STATSN: |
| 3284 | sscanf(buf, "%u", &conn->exp_statsn); |
| 3285 | break; |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3286 | case ISCSI_PARAM_USERNAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3287 | return iscsi_switch_str_param(&session->username, buf); |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3288 | case ISCSI_PARAM_USERNAME_IN: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3289 | return iscsi_switch_str_param(&session->username_in, buf); |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3290 | case ISCSI_PARAM_PASSWORD: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3291 | return iscsi_switch_str_param(&session->password, buf); |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3292 | case ISCSI_PARAM_PASSWORD_IN: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3293 | return iscsi_switch_str_param(&session->password_in, buf); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3294 | case ISCSI_PARAM_TARGET_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3295 | return iscsi_switch_str_param(&session->targetname, buf); |
Vikas Chaudhary | 3c5c480 | 2012-01-19 03:06:53 -0800 | [diff] [blame] | 3296 | case ISCSI_PARAM_TARGET_ALIAS: |
| 3297 | return iscsi_switch_str_param(&session->targetalias, buf); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3298 | case ISCSI_PARAM_TPGT: |
| 3299 | sscanf(buf, "%d", &session->tpgt); |
| 3300 | break; |
| 3301 | case ISCSI_PARAM_PERSISTENT_PORT: |
| 3302 | sscanf(buf, "%d", &conn->persistent_port); |
| 3303 | break; |
| 3304 | case ISCSI_PARAM_PERSISTENT_ADDRESS: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3305 | return iscsi_switch_str_param(&conn->persistent_address, buf); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3306 | case ISCSI_PARAM_IFACE_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3307 | return iscsi_switch_str_param(&session->ifacename, buf); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3308 | case ISCSI_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3309 | return iscsi_switch_str_param(&session->initiatorname, buf); |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 3310 | case ISCSI_PARAM_BOOT_ROOT: |
| 3311 | return iscsi_switch_str_param(&session->boot_root, buf); |
| 3312 | case ISCSI_PARAM_BOOT_NIC: |
| 3313 | return iscsi_switch_str_param(&session->boot_nic, buf); |
| 3314 | case ISCSI_PARAM_BOOT_TARGET: |
| 3315 | return iscsi_switch_str_param(&session->boot_target, buf); |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3316 | case ISCSI_PARAM_PORTAL_TYPE: |
| 3317 | return iscsi_switch_str_param(&session->portal_type, buf); |
| 3318 | case ISCSI_PARAM_DISCOVERY_PARENT_TYPE: |
| 3319 | return iscsi_switch_str_param(&session->discovery_parent_type, |
| 3320 | buf); |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 3321 | case ISCSI_PARAM_DISCOVERY_SESS: |
| 3322 | sscanf(buf, "%d", &val); |
| 3323 | session->discovery_sess = !!val; |
| 3324 | break; |
Adheer Chandravanshi | ae56ff4 | 2013-11-22 05:28:21 -0500 | [diff] [blame] | 3325 | case ISCSI_PARAM_LOCAL_IPADDR: |
| 3326 | return iscsi_switch_str_param(&conn->local_ipaddr, buf); |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3327 | default: |
| 3328 | return -ENOSYS; |
| 3329 | } |
| 3330 | |
| 3331 | return 0; |
| 3332 | } |
| 3333 | EXPORT_SYMBOL_GPL(iscsi_set_param); |
| 3334 | |
| 3335 | int iscsi_session_get_param(struct iscsi_cls_session *cls_session, |
| 3336 | enum iscsi_param param, char *buf) |
| 3337 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3338 | struct iscsi_session *session = cls_session->dd_data; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3339 | int len; |
| 3340 | |
| 3341 | switch(param) { |
Mike Christie | 843c0a8 | 2007-12-13 12:43:20 -0600 | [diff] [blame] | 3342 | case ISCSI_PARAM_FAST_ABORT: |
| 3343 | len = sprintf(buf, "%d\n", session->fast_abort); |
| 3344 | break; |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3345 | case ISCSI_PARAM_ABORT_TMO: |
| 3346 | len = sprintf(buf, "%d\n", session->abort_timeout); |
| 3347 | break; |
| 3348 | case ISCSI_PARAM_LU_RESET_TMO: |
| 3349 | len = sprintf(buf, "%d\n", session->lu_reset_timeout); |
| 3350 | break; |
Mike Christie | 3fe5ae8 | 2009-11-11 16:34:33 -0600 | [diff] [blame] | 3351 | case ISCSI_PARAM_TGT_RESET_TMO: |
| 3352 | len = sprintf(buf, "%d\n", session->tgt_reset_timeout); |
| 3353 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3354 | case ISCSI_PARAM_INITIAL_R2T_EN: |
| 3355 | len = sprintf(buf, "%d\n", session->initial_r2t_en); |
| 3356 | break; |
| 3357 | case ISCSI_PARAM_MAX_R2T: |
| 3358 | len = sprintf(buf, "%hu\n", session->max_r2t); |
| 3359 | break; |
| 3360 | case ISCSI_PARAM_IMM_DATA_EN: |
| 3361 | len = sprintf(buf, "%d\n", session->imm_data_en); |
| 3362 | break; |
| 3363 | case ISCSI_PARAM_FIRST_BURST: |
| 3364 | len = sprintf(buf, "%u\n", session->first_burst); |
| 3365 | break; |
| 3366 | case ISCSI_PARAM_MAX_BURST: |
| 3367 | len = sprintf(buf, "%u\n", session->max_burst); |
| 3368 | break; |
| 3369 | case ISCSI_PARAM_PDU_INORDER_EN: |
| 3370 | len = sprintf(buf, "%d\n", session->pdu_inorder_en); |
| 3371 | break; |
| 3372 | case ISCSI_PARAM_DATASEQ_INORDER_EN: |
| 3373 | len = sprintf(buf, "%d\n", session->dataseq_inorder_en); |
| 3374 | break; |
Adheer Chandravanshi | 5f09e1f | 2013-07-22 07:46:10 -0400 | [diff] [blame] | 3375 | case ISCSI_PARAM_DEF_TASKMGMT_TMO: |
| 3376 | len = sprintf(buf, "%d\n", session->def_taskmgmt_tmo); |
| 3377 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3378 | case ISCSI_PARAM_ERL: |
| 3379 | len = sprintf(buf, "%d\n", session->erl); |
| 3380 | break; |
| 3381 | case ISCSI_PARAM_TARGET_NAME: |
| 3382 | len = sprintf(buf, "%s\n", session->targetname); |
| 3383 | break; |
Vikas Chaudhary | 3c5c480 | 2012-01-19 03:06:53 -0800 | [diff] [blame] | 3384 | case ISCSI_PARAM_TARGET_ALIAS: |
| 3385 | len = sprintf(buf, "%s\n", session->targetalias); |
| 3386 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3387 | case ISCSI_PARAM_TPGT: |
| 3388 | len = sprintf(buf, "%d\n", session->tpgt); |
| 3389 | break; |
Mike Christie | b2c6416 | 2007-05-30 12:57:16 -0500 | [diff] [blame] | 3390 | case ISCSI_PARAM_USERNAME: |
| 3391 | len = sprintf(buf, "%s\n", session->username); |
| 3392 | break; |
| 3393 | case ISCSI_PARAM_USERNAME_IN: |
| 3394 | len = sprintf(buf, "%s\n", session->username_in); |
| 3395 | break; |
| 3396 | case ISCSI_PARAM_PASSWORD: |
| 3397 | len = sprintf(buf, "%s\n", session->password); |
| 3398 | break; |
| 3399 | case ISCSI_PARAM_PASSWORD_IN: |
| 3400 | len = sprintf(buf, "%s\n", session->password_in); |
| 3401 | break; |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3402 | case ISCSI_PARAM_IFACE_NAME: |
| 3403 | len = sprintf(buf, "%s\n", session->ifacename); |
| 3404 | break; |
| 3405 | case ISCSI_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3406 | len = sprintf(buf, "%s\n", session->initiatorname); |
Mike Christie | 88dfd34 | 2008-05-21 15:54:16 -0500 | [diff] [blame] | 3407 | break; |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 3408 | case ISCSI_PARAM_BOOT_ROOT: |
| 3409 | len = sprintf(buf, "%s\n", session->boot_root); |
| 3410 | break; |
| 3411 | case ISCSI_PARAM_BOOT_NIC: |
| 3412 | len = sprintf(buf, "%s\n", session->boot_nic); |
| 3413 | break; |
| 3414 | case ISCSI_PARAM_BOOT_TARGET: |
| 3415 | len = sprintf(buf, "%s\n", session->boot_target); |
Adheer Chandravanshi | 9a2307b | 2013-07-22 07:46:09 -0400 | [diff] [blame] | 3416 | break; |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3417 | case ISCSI_PARAM_AUTO_SND_TGT_DISABLE: |
| 3418 | len = sprintf(buf, "%u\n", session->auto_snd_tgt_disable); |
| 3419 | break; |
| 3420 | case ISCSI_PARAM_DISCOVERY_SESS: |
| 3421 | len = sprintf(buf, "%u\n", session->discovery_sess); |
| 3422 | break; |
| 3423 | case ISCSI_PARAM_PORTAL_TYPE: |
| 3424 | len = sprintf(buf, "%s\n", session->portal_type); |
| 3425 | break; |
| 3426 | case ISCSI_PARAM_CHAP_AUTH_EN: |
| 3427 | len = sprintf(buf, "%u\n", session->chap_auth_en); |
| 3428 | break; |
| 3429 | case ISCSI_PARAM_DISCOVERY_LOGOUT_EN: |
| 3430 | len = sprintf(buf, "%u\n", session->discovery_logout_en); |
| 3431 | break; |
| 3432 | case ISCSI_PARAM_BIDI_CHAP_EN: |
| 3433 | len = sprintf(buf, "%u\n", session->bidi_chap_en); |
| 3434 | break; |
| 3435 | case ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL: |
| 3436 | len = sprintf(buf, "%u\n", session->discovery_auth_optional); |
| 3437 | break; |
| 3438 | case ISCSI_PARAM_DEF_TIME2WAIT: |
| 3439 | len = sprintf(buf, "%d\n", session->time2wait); |
| 3440 | break; |
| 3441 | case ISCSI_PARAM_DEF_TIME2RETAIN: |
| 3442 | len = sprintf(buf, "%d\n", session->time2retain); |
| 3443 | break; |
| 3444 | case ISCSI_PARAM_TSID: |
| 3445 | len = sprintf(buf, "%u\n", session->tsid); |
| 3446 | break; |
| 3447 | case ISCSI_PARAM_ISID: |
| 3448 | len = sprintf(buf, "%02x%02x%02x%02x%02x%02x\n", |
| 3449 | session->isid[0], session->isid[1], |
| 3450 | session->isid[2], session->isid[3], |
| 3451 | session->isid[4], session->isid[5]); |
| 3452 | break; |
| 3453 | case ISCSI_PARAM_DISCOVERY_PARENT_IDX: |
| 3454 | len = sprintf(buf, "%u\n", session->discovery_parent_idx); |
| 3455 | break; |
| 3456 | case ISCSI_PARAM_DISCOVERY_PARENT_TYPE: |
| 3457 | if (session->discovery_parent_type) |
| 3458 | len = sprintf(buf, "%s\n", |
| 3459 | session->discovery_parent_type); |
| 3460 | else |
| 3461 | len = sprintf(buf, "\n"); |
Eddie Wai | 3b9373e | 2013-06-20 10:21:26 -0700 | [diff] [blame] | 3462 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3463 | default: |
| 3464 | return -ENOSYS; |
| 3465 | } |
| 3466 | |
| 3467 | return len; |
| 3468 | } |
| 3469 | EXPORT_SYMBOL_GPL(iscsi_session_get_param); |
| 3470 | |
Mike Christie | 00f3708 | 2011-02-16 15:04:35 -0600 | [diff] [blame] | 3471 | int iscsi_conn_get_addr_param(struct sockaddr_storage *addr, |
| 3472 | enum iscsi_param param, char *buf) |
| 3473 | { |
| 3474 | struct sockaddr_in6 *sin6 = NULL; |
| 3475 | struct sockaddr_in *sin = NULL; |
| 3476 | int len; |
| 3477 | |
| 3478 | switch (addr->ss_family) { |
| 3479 | case AF_INET: |
| 3480 | sin = (struct sockaddr_in *)addr; |
| 3481 | break; |
| 3482 | case AF_INET6: |
| 3483 | sin6 = (struct sockaddr_in6 *)addr; |
| 3484 | break; |
| 3485 | default: |
| 3486 | return -EINVAL; |
| 3487 | } |
| 3488 | |
| 3489 | switch (param) { |
| 3490 | case ISCSI_PARAM_CONN_ADDRESS: |
| 3491 | case ISCSI_HOST_PARAM_IPADDRESS: |
| 3492 | if (sin) |
| 3493 | len = sprintf(buf, "%pI4\n", &sin->sin_addr.s_addr); |
| 3494 | else |
| 3495 | len = sprintf(buf, "%pI6\n", &sin6->sin6_addr); |
| 3496 | break; |
| 3497 | case ISCSI_PARAM_CONN_PORT: |
| 3498 | if (sin) |
| 3499 | len = sprintf(buf, "%hu\n", be16_to_cpu(sin->sin_port)); |
| 3500 | else |
| 3501 | len = sprintf(buf, "%hu\n", |
| 3502 | be16_to_cpu(sin6->sin6_port)); |
| 3503 | break; |
| 3504 | default: |
| 3505 | return -EINVAL; |
| 3506 | } |
| 3507 | |
| 3508 | return len; |
| 3509 | } |
| 3510 | EXPORT_SYMBOL_GPL(iscsi_conn_get_addr_param); |
| 3511 | |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3512 | int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| 3513 | enum iscsi_param param, char *buf) |
| 3514 | { |
| 3515 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 3516 | int len; |
| 3517 | |
| 3518 | switch(param) { |
Mike Christie | f6d5180 | 2007-12-13 12:43:30 -0600 | [diff] [blame] | 3519 | case ISCSI_PARAM_PING_TMO: |
| 3520 | len = sprintf(buf, "%u\n", conn->ping_timeout); |
| 3521 | break; |
| 3522 | case ISCSI_PARAM_RECV_TMO: |
| 3523 | len = sprintf(buf, "%u\n", conn->recv_timeout); |
| 3524 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3525 | case ISCSI_PARAM_MAX_RECV_DLENGTH: |
| 3526 | len = sprintf(buf, "%u\n", conn->max_recv_dlength); |
| 3527 | break; |
| 3528 | case ISCSI_PARAM_MAX_XMIT_DLENGTH: |
| 3529 | len = sprintf(buf, "%u\n", conn->max_xmit_dlength); |
| 3530 | break; |
| 3531 | case ISCSI_PARAM_HDRDGST_EN: |
| 3532 | len = sprintf(buf, "%d\n", conn->hdrdgst_en); |
| 3533 | break; |
| 3534 | case ISCSI_PARAM_DATADGST_EN: |
| 3535 | len = sprintf(buf, "%d\n", conn->datadgst_en); |
| 3536 | break; |
| 3537 | case ISCSI_PARAM_IFMARKER_EN: |
| 3538 | len = sprintf(buf, "%d\n", conn->ifmarker_en); |
| 3539 | break; |
| 3540 | case ISCSI_PARAM_OFMARKER_EN: |
| 3541 | len = sprintf(buf, "%d\n", conn->ofmarker_en); |
| 3542 | break; |
| 3543 | case ISCSI_PARAM_EXP_STATSN: |
| 3544 | len = sprintf(buf, "%u\n", conn->exp_statsn); |
| 3545 | break; |
| 3546 | case ISCSI_PARAM_PERSISTENT_PORT: |
| 3547 | len = sprintf(buf, "%d\n", conn->persistent_port); |
| 3548 | break; |
| 3549 | case ISCSI_PARAM_PERSISTENT_ADDRESS: |
| 3550 | len = sprintf(buf, "%s\n", conn->persistent_address); |
| 3551 | break; |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3552 | case ISCSI_PARAM_STATSN: |
| 3553 | len = sprintf(buf, "%u\n", conn->statsn); |
| 3554 | break; |
| 3555 | case ISCSI_PARAM_MAX_SEGMENT_SIZE: |
| 3556 | len = sprintf(buf, "%u\n", conn->max_segment_size); |
| 3557 | break; |
| 3558 | case ISCSI_PARAM_KEEPALIVE_TMO: |
| 3559 | len = sprintf(buf, "%u\n", conn->keepalive_tmo); |
| 3560 | break; |
| 3561 | case ISCSI_PARAM_LOCAL_PORT: |
| 3562 | len = sprintf(buf, "%u\n", conn->local_port); |
| 3563 | break; |
| 3564 | case ISCSI_PARAM_TCP_TIMESTAMP_STAT: |
| 3565 | len = sprintf(buf, "%u\n", conn->tcp_timestamp_stat); |
| 3566 | break; |
| 3567 | case ISCSI_PARAM_TCP_NAGLE_DISABLE: |
| 3568 | len = sprintf(buf, "%u\n", conn->tcp_nagle_disable); |
| 3569 | break; |
| 3570 | case ISCSI_PARAM_TCP_WSF_DISABLE: |
| 3571 | len = sprintf(buf, "%u\n", conn->tcp_wsf_disable); |
| 3572 | break; |
| 3573 | case ISCSI_PARAM_TCP_TIMER_SCALE: |
| 3574 | len = sprintf(buf, "%u\n", conn->tcp_timer_scale); |
| 3575 | break; |
| 3576 | case ISCSI_PARAM_TCP_TIMESTAMP_EN: |
| 3577 | len = sprintf(buf, "%u\n", conn->tcp_timestamp_en); |
| 3578 | break; |
| 3579 | case ISCSI_PARAM_IP_FRAGMENT_DISABLE: |
| 3580 | len = sprintf(buf, "%u\n", conn->fragment_disable); |
| 3581 | break; |
| 3582 | case ISCSI_PARAM_IPV4_TOS: |
| 3583 | len = sprintf(buf, "%u\n", conn->ipv4_tos); |
| 3584 | break; |
| 3585 | case ISCSI_PARAM_IPV6_TC: |
| 3586 | len = sprintf(buf, "%u\n", conn->ipv6_traffic_class); |
| 3587 | break; |
Adheer Chandravanshi | 5f09e1f | 2013-07-22 07:46:10 -0400 | [diff] [blame] | 3588 | case ISCSI_PARAM_IPV6_FLOW_LABEL: |
| 3589 | len = sprintf(buf, "%u\n", conn->ipv6_flow_label); |
| 3590 | break; |
Adheer Chandravanshi | f8525eb | 2013-07-01 05:54:12 -0400 | [diff] [blame] | 3591 | case ISCSI_PARAM_IS_FW_ASSIGNED_IPV6: |
| 3592 | len = sprintf(buf, "%u\n", conn->is_fw_assigned_ipv6); |
| 3593 | break; |
| 3594 | case ISCSI_PARAM_TCP_XMIT_WSF: |
| 3595 | len = sprintf(buf, "%u\n", conn->tcp_xmit_wsf); |
| 3596 | break; |
| 3597 | case ISCSI_PARAM_TCP_RECV_WSF: |
| 3598 | len = sprintf(buf, "%u\n", conn->tcp_recv_wsf); |
| 3599 | break; |
Adheer Chandravanshi | ae56ff4 | 2013-11-22 05:28:21 -0500 | [diff] [blame] | 3600 | case ISCSI_PARAM_LOCAL_IPADDR: |
| 3601 | len = sprintf(buf, "%s\n", conn->local_ipaddr); |
| 3602 | break; |
Mike Christie | a54a52c | 2006-06-28 12:00:23 -0500 | [diff] [blame] | 3603 | default: |
| 3604 | return -ENOSYS; |
| 3605 | } |
| 3606 | |
| 3607 | return len; |
| 3608 | } |
| 3609 | EXPORT_SYMBOL_GPL(iscsi_conn_get_param); |
| 3610 | |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3611 | int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, |
| 3612 | char *buf) |
| 3613 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3614 | struct iscsi_host *ihost = shost_priv(shost); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3615 | int len; |
| 3616 | |
| 3617 | switch (param) { |
Mike Christie | d8196ed | 2007-05-30 12:57:25 -0500 | [diff] [blame] | 3618 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3619 | len = sprintf(buf, "%s\n", ihost->netdev); |
Mike Christie | d8196ed | 2007-05-30 12:57:25 -0500 | [diff] [blame] | 3620 | break; |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3621 | case ISCSI_HOST_PARAM_HWADDRESS: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3622 | len = sprintf(buf, "%s\n", ihost->hwaddress); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3623 | break; |
Mike Christie | 8ad5781 | 2007-05-30 12:57:13 -0500 | [diff] [blame] | 3624 | case ISCSI_HOST_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3625 | len = sprintf(buf, "%s\n", ihost->initiatorname); |
Mike Christie | 8ad5781 | 2007-05-30 12:57:13 -0500 | [diff] [blame] | 3626 | break; |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3627 | default: |
| 3628 | return -ENOSYS; |
| 3629 | } |
| 3630 | |
| 3631 | return len; |
| 3632 | } |
| 3633 | EXPORT_SYMBOL_GPL(iscsi_host_get_param); |
| 3634 | |
| 3635 | int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param, |
| 3636 | char *buf, int buflen) |
| 3637 | { |
Mike Christie | 7561352 | 2008-05-21 15:53:59 -0500 | [diff] [blame] | 3638 | struct iscsi_host *ihost = shost_priv(shost); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3639 | |
| 3640 | switch (param) { |
Mike Christie | d8196ed | 2007-05-30 12:57:25 -0500 | [diff] [blame] | 3641 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3642 | return iscsi_switch_str_param(&ihost->netdev, buf); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3643 | case ISCSI_HOST_PARAM_HWADDRESS: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3644 | return iscsi_switch_str_param(&ihost->hwaddress, buf); |
Mike Christie | 8ad5781 | 2007-05-30 12:57:13 -0500 | [diff] [blame] | 3645 | case ISCSI_HOST_PARAM_INITIATOR_NAME: |
Mike Christie | 5700b1a | 2009-05-13 17:57:40 -0500 | [diff] [blame] | 3646 | return iscsi_switch_str_param(&ihost->initiatorname, buf); |
Mike Christie | 0801c24 | 2007-05-30 12:57:12 -0500 | [diff] [blame] | 3647 | default: |
| 3648 | return -ENOSYS; |
| 3649 | } |
| 3650 | |
| 3651 | return 0; |
| 3652 | } |
| 3653 | EXPORT_SYMBOL_GPL(iscsi_host_set_param); |
| 3654 | |
Mike Christie | 7996a77 | 2006-04-06 21:13:41 -0500 | [diff] [blame] | 3655 | MODULE_AUTHOR("Mike Christie"); |
| 3656 | MODULE_DESCRIPTION("iSCSI library functions"); |
| 3657 | MODULE_LICENSE("GPL"); |