Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_alua.c |
| 3 | * |
| 4 | * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA) |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2009-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 7 | * |
| 8 | * Nicholas A. Bellinger <nab@kernel.org> |
| 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 | ******************************************************************************/ |
| 25 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 26 | #include <linux/slab.h> |
| 27 | #include <linux/spinlock.h> |
| 28 | #include <linux/configfs.h> |
Paul Gortmaker | c53181a | 2011-08-30 18:16:43 -0400 | [diff] [blame] | 29 | #include <linux/export.h> |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 30 | #include <linux/file.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 31 | #include <scsi/scsi.h> |
| 32 | #include <scsi/scsi_cmnd.h> |
Roland Dreier | 33395fb | 2012-02-23 17:22:12 -0800 | [diff] [blame] | 33 | #include <asm/unaligned.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 34 | |
| 35 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 36 | #include <target/target_core_backend.h> |
| 37 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 38 | #include <target/target_core_configfs.h> |
| 39 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 40 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 41 | #include "target_core_alua.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 42 | #include "target_core_ua.h" |
| 43 | |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 44 | static sense_reason_t core_alua_check_transition(int state, int valid, |
| 45 | int *primary); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 46 | static int core_alua_set_tg_pt_secondary_state( |
| 47 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 48 | struct se_port *port, int explicit, int offline); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 50 | static char *core_alua_dump_state(int state); |
| 51 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 52 | static u16 alua_lu_gps_counter; |
| 53 | static u32 alua_lu_gps_count; |
| 54 | |
| 55 | static DEFINE_SPINLOCK(lu_gps_lock); |
| 56 | static LIST_HEAD(lu_gps_list); |
| 57 | |
| 58 | struct t10_alua_lu_gp *default_lu_gp; |
| 59 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | /* |
| 61 | * REPORT_TARGET_PORT_GROUPS |
| 62 | * |
| 63 | * See spc4r17 section 6.27 |
| 64 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 65 | sense_reason_t |
| 66 | target_emulate_report_target_port_groups(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 68 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 69 | struct se_port *port; |
| 70 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 71 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 72 | unsigned char *buf; |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 73 | u32 rd_len = 0, off; |
| 74 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 75 | |
Nicholas Bellinger | 6b20fa9 | 2011-10-18 23:48:04 -0700 | [diff] [blame] | 76 | /* |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 77 | * Skip over RESERVED area to first Target port group descriptor |
| 78 | * depending on the PARAMETER DATA FORMAT type.. |
Nicholas Bellinger | 6b20fa9 | 2011-10-18 23:48:04 -0700 | [diff] [blame] | 79 | */ |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 80 | if (ext_hdr != 0) |
| 81 | off = 8; |
| 82 | else |
| 83 | off = 4; |
| 84 | |
| 85 | if (cmd->data_length < off) { |
| 86 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" |
| 87 | " small for %s header\n", cmd->data_length, |
| 88 | (ext_hdr) ? "extended" : "normal"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 89 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | 6b20fa9 | 2011-10-18 23:48:04 -0700 | [diff] [blame] | 90 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 91 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 92 | if (!buf) |
| 93 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 94 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 95 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
| 96 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | tg_pt_gp_list) { |
| 98 | /* |
Nicholas Bellinger | 6b20fa9 | 2011-10-18 23:48:04 -0700 | [diff] [blame] | 99 | * Check if the Target port group and Target port descriptor list |
| 100 | * based on tg_pt_gp_members count will fit into the response payload. |
| 101 | * Otherwise, bump rd_len to let the initiator know we have exceeded |
| 102 | * the allocation length and the response is truncated. |
| 103 | */ |
| 104 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > |
| 105 | cmd->data_length) { |
| 106 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); |
| 107 | continue; |
| 108 | } |
| 109 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 110 | * PREF: Preferred target port bit, determine if this |
| 111 | * bit should be set for port group. |
| 112 | */ |
| 113 | if (tg_pt_gp->tg_pt_gp_pref) |
| 114 | buf[off] = 0x80; |
| 115 | /* |
| 116 | * Set the ASYMMETRIC ACCESS State |
| 117 | */ |
| 118 | buf[off++] |= (atomic_read( |
| 119 | &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff); |
| 120 | /* |
| 121 | * Set supported ASYMMETRIC ACCESS State bits |
| 122 | */ |
Hannes Reinecke | c0dc941 | 2013-11-19 09:07:49 +0100 | [diff] [blame] | 123 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 124 | /* |
| 125 | * TARGET PORT GROUP |
| 126 | */ |
| 127 | buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff); |
| 128 | buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff); |
| 129 | |
| 130 | off++; /* Skip over Reserved */ |
| 131 | /* |
| 132 | * STATUS CODE |
| 133 | */ |
| 134 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); |
| 135 | /* |
| 136 | * Vendor Specific field |
| 137 | */ |
| 138 | buf[off++] = 0x00; |
| 139 | /* |
| 140 | * TARGET PORT COUNT |
| 141 | */ |
| 142 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); |
| 143 | rd_len += 8; |
| 144 | |
| 145 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 146 | list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, |
| 147 | tg_pt_gp_mem_list) { |
| 148 | port = tg_pt_gp_mem->tg_pt; |
| 149 | /* |
| 150 | * Start Target Port descriptor format |
| 151 | * |
| 152 | * See spc4r17 section 6.2.7 Table 247 |
| 153 | */ |
| 154 | off += 2; /* Skip over Obsolete */ |
| 155 | /* |
| 156 | * Set RELATIVE TARGET PORT IDENTIFIER |
| 157 | */ |
| 158 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 159 | buf[off++] = (port->sep_rtpi & 0xff); |
| 160 | rd_len += 4; |
| 161 | } |
| 162 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 163 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 164 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 165 | /* |
| 166 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload |
| 167 | */ |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 168 | put_unaligned_be32(rd_len, &buf[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 169 | |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 170 | /* |
| 171 | * Fill in the Extended header parameter data format if requested |
| 172 | */ |
| 173 | if (ext_hdr != 0) { |
| 174 | buf[4] = 0x10; |
| 175 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 176 | * Set the implicit transition time (in seconds) for the application |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 177 | * client to use as a base for it's transition timeout value. |
| 178 | * |
| 179 | * Use the current tg_pt_gp_mem -> tg_pt_gp membership from the LUN |
| 180 | * this CDB was received upon to determine this value individually |
| 181 | * for ALUA target port group. |
| 182 | */ |
| 183 | port = cmd->se_lun->lun_sep; |
| 184 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 185 | if (tg_pt_gp_mem) { |
| 186 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 187 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 188 | if (tg_pt_gp) |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 189 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 190 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 191 | } |
| 192 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 193 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 194 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 195 | target_complete_cmd(cmd, GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 200 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 201 | * |
| 202 | * See spc4r17 section 6.35 |
| 203 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 204 | sense_reason_t |
| 205 | target_emulate_set_target_port_groups(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 206 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 207 | struct se_device *dev = cmd->se_dev; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 208 | struct se_port *port, *l_port = cmd->se_lun->lun_sep; |
| 209 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 210 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
| 211 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 212 | unsigned char *buf; |
| 213 | unsigned char *ptr; |
Hannes Reinecke | a0d50f6 | 2012-12-17 09:53:34 +0100 | [diff] [blame] | 214 | sense_reason_t rc = TCM_NO_SENSE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 215 | u32 len = 4; /* Skip over RESERVED area in header */ |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 216 | int alua_access_state, primary = 0, valid_states; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 217 | u16 tg_pt_id, rtpi; |
| 218 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 219 | if (!l_port) |
| 220 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 221 | |
Paolo Bonzini | 0d7f129 | 2012-09-07 17:30:33 +0200 | [diff] [blame] | 222 | if (cmd->data_length < 4) { |
| 223 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" |
| 224 | " small\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 225 | return TCM_INVALID_PARAMETER_LIST; |
Paolo Bonzini | 0d7f129 | 2012-09-07 17:30:33 +0200 | [diff] [blame] | 226 | } |
| 227 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 228 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 229 | if (!buf) |
| 230 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 231 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 232 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 233 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 234 | * for the local tg_pt_gp. |
| 235 | */ |
| 236 | l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 237 | if (!l_tg_pt_gp_mem) { |
| 238 | pr_err("Unable to access l_port->sep_alua_tg_pt_gp_mem\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 239 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 240 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 241 | } |
| 242 | spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 243 | l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 244 | if (!l_tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 245 | spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 246 | pr_err("Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 247 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 248 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 249 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 250 | spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 251 | |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 252 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 253 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 254 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 255 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 256 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 257 | } |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 258 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 259 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 260 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
| 261 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 262 | while (len < cmd->data_length) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 263 | bool found = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 264 | alua_access_state = (ptr[0] & 0x0f); |
| 265 | /* |
| 266 | * Check the received ALUA access state, and determine if |
| 267 | * the state is a primary or secondary target port asymmetric |
| 268 | * access state. |
| 269 | */ |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 270 | rc = core_alua_check_transition(alua_access_state, |
| 271 | valid_states, &primary); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 272 | if (rc) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 273 | /* |
| 274 | * If the SET TARGET PORT GROUPS attempts to establish |
| 275 | * an invalid combination of target port asymmetric |
| 276 | * access states or attempts to establish an |
| 277 | * unsupported target port asymmetric access state, |
| 278 | * then the command shall be terminated with CHECK |
| 279 | * CONDITION status, with the sense key set to ILLEGAL |
| 280 | * REQUEST, and the additional sense code set to INVALID |
| 281 | * FIELD IN PARAMETER LIST. |
| 282 | */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 283 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 284 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 285 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 286 | /* |
| 287 | * If the ASYMMETRIC ACCESS STATE field (see table 267) |
| 288 | * specifies a primary target port asymmetric access state, |
| 289 | * then the TARGET PORT GROUP OR TARGET PORT field specifies |
| 290 | * a primary target port group for which the primary target |
| 291 | * port asymmetric access state shall be changed. If the |
| 292 | * ASYMMETRIC ACCESS STATE field specifies a secondary target |
| 293 | * port asymmetric access state, then the TARGET PORT GROUP OR |
| 294 | * TARGET PORT field specifies the relative target port |
| 295 | * identifier (see 3.1.120) of the target port for which the |
| 296 | * secondary target port asymmetric access state shall be |
| 297 | * changed. |
| 298 | */ |
| 299 | if (primary) { |
Roland Dreier | 33395fb | 2012-02-23 17:22:12 -0800 | [diff] [blame] | 300 | tg_pt_id = get_unaligned_be16(ptr + 2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 301 | /* |
| 302 | * Locate the matching target port group ID from |
| 303 | * the global tg_pt_gp list |
| 304 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 305 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 306 | list_for_each_entry(tg_pt_gp, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 307 | &dev->t10_alua.tg_pt_gps_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 308 | tg_pt_gp_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 309 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 310 | continue; |
| 311 | |
| 312 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) |
| 313 | continue; |
| 314 | |
| 315 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
| 316 | smp_mb__after_atomic_inc(); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 317 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 318 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 319 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 320 | if (!core_alua_do_port_transition(tg_pt_gp, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 321 | dev, l_port, nacl, |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 322 | alua_access_state, 1)) |
| 323 | found = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 324 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 325 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 326 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
| 327 | smp_mb__after_atomic_dec(); |
| 328 | break; |
| 329 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 330 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 331 | } else { |
| 332 | /* |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 333 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 334 | * the Target Port in question for the the incoming |
| 335 | * SET_TARGET_PORT_GROUPS op. |
| 336 | */ |
Roland Dreier | 33395fb | 2012-02-23 17:22:12 -0800 | [diff] [blame] | 337 | rtpi = get_unaligned_be16(ptr + 2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 338 | /* |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 339 | * Locate the matching relative target port identifier |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 340 | * for the struct se_device storage object. |
| 341 | */ |
| 342 | spin_lock(&dev->se_port_lock); |
| 343 | list_for_each_entry(port, &dev->dev_sep_list, |
| 344 | sep_list) { |
| 345 | if (port->sep_rtpi != rtpi) |
| 346 | continue; |
| 347 | |
| 348 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 349 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 350 | spin_unlock(&dev->se_port_lock); |
| 351 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 352 | if (!core_alua_set_tg_pt_secondary_state( |
| 353 | tg_pt_gp_mem, port, 1, 1)) |
| 354 | found = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 355 | |
| 356 | spin_lock(&dev->se_port_lock); |
| 357 | break; |
| 358 | } |
| 359 | spin_unlock(&dev->se_port_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | if (!found) { |
| 363 | rc = TCM_INVALID_PARAMETER_LIST; |
| 364 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | ptr += 4; |
| 368 | len += 4; |
| 369 | } |
| 370 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 371 | out: |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 372 | transport_kunmap_data_sg(cmd); |
Roland Dreier | 59e4f54 | 2012-06-04 23:24:51 -0700 | [diff] [blame] | 373 | if (!rc) |
| 374 | target_complete_cmd(cmd, GOOD); |
| 375 | return rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | static inline int core_alua_state_nonoptimized( |
| 379 | struct se_cmd *cmd, |
| 380 | unsigned char *cdb, |
| 381 | int nonop_delay_msecs, |
| 382 | u8 *alua_ascq) |
| 383 | { |
| 384 | /* |
| 385 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked |
| 386 | * later to determine if processing of this cmd needs to be |
| 387 | * temporarily delayed for the Active/NonOptimized primary access state. |
| 388 | */ |
| 389 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; |
| 390 | cmd->alua_nonop_delay = nonop_delay_msecs; |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | static inline int core_alua_state_standby( |
| 395 | struct se_cmd *cmd, |
| 396 | unsigned char *cdb, |
| 397 | u8 *alua_ascq) |
| 398 | { |
| 399 | /* |
| 400 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by |
| 401 | * spc4r17 section 5.9.2.4.4 |
| 402 | */ |
| 403 | switch (cdb[0]) { |
| 404 | case INQUIRY: |
| 405 | case LOG_SELECT: |
| 406 | case LOG_SENSE: |
| 407 | case MODE_SELECT: |
| 408 | case MODE_SENSE: |
| 409 | case REPORT_LUNS: |
| 410 | case RECEIVE_DIAGNOSTIC: |
| 411 | case SEND_DIAGNOSTIC: |
Nicholas Bellinger | 30f359a | 2013-04-10 15:00:27 -0700 | [diff] [blame] | 412 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 413 | case MAINTENANCE_IN: |
Nicholas Bellinger | ba53974 | 2012-05-16 21:52:10 -0700 | [diff] [blame] | 414 | switch (cdb[1] & 0x1f) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 415 | case MI_REPORT_TARGET_PGS: |
| 416 | return 0; |
| 417 | default: |
| 418 | *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY; |
| 419 | return 1; |
| 420 | } |
| 421 | case MAINTENANCE_OUT: |
| 422 | switch (cdb[1]) { |
| 423 | case MO_SET_TARGET_PGS: |
| 424 | return 0; |
| 425 | default: |
| 426 | *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY; |
| 427 | return 1; |
| 428 | } |
| 429 | case REQUEST_SENSE: |
| 430 | case PERSISTENT_RESERVE_IN: |
| 431 | case PERSISTENT_RESERVE_OUT: |
| 432 | case READ_BUFFER: |
| 433 | case WRITE_BUFFER: |
| 434 | return 0; |
| 435 | default: |
| 436 | *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY; |
| 437 | return 1; |
| 438 | } |
| 439 | |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | static inline int core_alua_state_unavailable( |
| 444 | struct se_cmd *cmd, |
| 445 | unsigned char *cdb, |
| 446 | u8 *alua_ascq) |
| 447 | { |
| 448 | /* |
| 449 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by |
| 450 | * spc4r17 section 5.9.2.4.5 |
| 451 | */ |
| 452 | switch (cdb[0]) { |
| 453 | case INQUIRY: |
| 454 | case REPORT_LUNS: |
Nicholas Bellinger | 30f359a | 2013-04-10 15:00:27 -0700 | [diff] [blame] | 455 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 456 | case MAINTENANCE_IN: |
Nicholas Bellinger | ba53974 | 2012-05-16 21:52:10 -0700 | [diff] [blame] | 457 | switch (cdb[1] & 0x1f) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 458 | case MI_REPORT_TARGET_PGS: |
| 459 | return 0; |
| 460 | default: |
| 461 | *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE; |
| 462 | return 1; |
| 463 | } |
| 464 | case MAINTENANCE_OUT: |
| 465 | switch (cdb[1]) { |
| 466 | case MO_SET_TARGET_PGS: |
| 467 | return 0; |
| 468 | default: |
| 469 | *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE; |
| 470 | return 1; |
| 471 | } |
| 472 | case REQUEST_SENSE: |
| 473 | case READ_BUFFER: |
| 474 | case WRITE_BUFFER: |
| 475 | return 0; |
| 476 | default: |
| 477 | *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE; |
| 478 | return 1; |
| 479 | } |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static inline int core_alua_state_transition( |
| 485 | struct se_cmd *cmd, |
| 486 | unsigned char *cdb, |
| 487 | u8 *alua_ascq) |
| 488 | { |
| 489 | /* |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 490 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 491 | * spc4r17 section 5.9.2.5 |
| 492 | */ |
| 493 | switch (cdb[0]) { |
| 494 | case INQUIRY: |
| 495 | case REPORT_LUNS: |
Nicholas Bellinger | 30f359a | 2013-04-10 15:00:27 -0700 | [diff] [blame] | 496 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 497 | case MAINTENANCE_IN: |
Nicholas Bellinger | ba53974 | 2012-05-16 21:52:10 -0700 | [diff] [blame] | 498 | switch (cdb[1] & 0x1f) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 499 | case MI_REPORT_TARGET_PGS: |
| 500 | return 0; |
| 501 | default: |
| 502 | *alua_ascq = ASCQ_04H_ALUA_STATE_TRANSITION; |
| 503 | return 1; |
| 504 | } |
| 505 | case REQUEST_SENSE: |
| 506 | case READ_BUFFER: |
| 507 | case WRITE_BUFFER: |
| 508 | return 0; |
| 509 | default: |
| 510 | *alua_ascq = ASCQ_04H_ALUA_STATE_TRANSITION; |
| 511 | return 1; |
| 512 | } |
| 513 | |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | /* |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 518 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 519 | * return 0: Used to signal success |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 520 | * return -1: Used to signal failure, and invalid cdb field |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 521 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 522 | sense_reason_t |
| 523 | target_alua_state_check(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 524 | { |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 525 | struct se_device *dev = cmd->se_dev; |
| 526 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 527 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 528 | struct se_port *port = lun->lun_sep; |
| 529 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 530 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 531 | int out_alua_state, nonop_delay_msecs; |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 532 | u8 alua_ascq; |
| 533 | int ret; |
| 534 | |
| 535 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) |
| 536 | return 0; |
| 537 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 538 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 539 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 540 | if (!port) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 541 | return 0; |
| 542 | /* |
| 543 | * First, check for a struct se_port specific secondary ALUA target port |
| 544 | * access state: OFFLINE |
| 545 | */ |
| 546 | if (atomic_read(&port->sep_tg_pt_secondary_offline)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 547 | pr_debug("ALUA: Got secondary offline status for local" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 548 | " target port\n"); |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 549 | alua_ascq = ASCQ_04H_ALUA_OFFLINE; |
| 550 | ret = 1; |
| 551 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 552 | } |
| 553 | /* |
| 554 | * Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the |
| 555 | * ALUA target port group, to obtain current ALUA access state. |
| 556 | * Otherwise look for the underlying struct se_device association with |
| 557 | * a ALUA logical unit group. |
| 558 | */ |
| 559 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
Nicholas Bellinger | 89c12cc | 2013-08-22 15:35:45 -0700 | [diff] [blame] | 560 | if (!tg_pt_gp_mem) |
| 561 | return 0; |
| 562 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 563 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 564 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 565 | out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); |
| 566 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; |
| 567 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 568 | /* |
Hannes Reinecke | 73f3bf5 | 2013-11-19 09:07:48 +0100 | [diff] [blame] | 569 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 570 | * statement so the compiler knows explicitly to check this case first. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 571 | * For the Optimized ALUA access state case, we want to process the |
| 572 | * incoming fabric cmd ASAP.. |
| 573 | */ |
Hannes Reinecke | 73f3bf5 | 2013-11-19 09:07:48 +0100 | [diff] [blame] | 574 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 575 | return 0; |
| 576 | |
| 577 | switch (out_alua_state) { |
| 578 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 579 | ret = core_alua_state_nonoptimized(cmd, cdb, |
| 580 | nonop_delay_msecs, &alua_ascq); |
| 581 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 582 | case ALUA_ACCESS_STATE_STANDBY: |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 583 | ret = core_alua_state_standby(cmd, cdb, &alua_ascq); |
| 584 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 585 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 586 | ret = core_alua_state_unavailable(cmd, cdb, &alua_ascq); |
| 587 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 588 | case ALUA_ACCESS_STATE_TRANSITION: |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 589 | ret = core_alua_state_transition(cmd, cdb, &alua_ascq); |
| 590 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 591 | /* |
| 592 | * OFFLINE is a secondary ALUA target port group access state, that is |
| 593 | * handled above with struct se_port->sep_tg_pt_secondary_offline=1 |
| 594 | */ |
| 595 | case ALUA_ACCESS_STATE_OFFLINE: |
| 596 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 597 | pr_err("Unknown ALUA access state: 0x%02x\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 598 | out_alua_state); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 599 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 600 | } |
| 601 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 602 | out: |
| 603 | if (ret > 0) { |
| 604 | /* |
| 605 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
| 606 | * The ALUA additional sense code qualifier (ASCQ) is determined |
| 607 | * by the ALUA primary or secondary access state.. |
| 608 | */ |
| 609 | pr_debug("[%s]: ALUA TG Port not available, " |
| 610 | "SenseKey: NOT_READY, ASC/ASCQ: " |
| 611 | "0x04/0x%02x\n", |
| 612 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
| 613 | |
| 614 | cmd->scsi_asc = 0x04; |
| 615 | cmd->scsi_ascq = alua_ascq; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 616 | return TCM_CHECK_CONDITION_NOT_READY; |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 617 | } |
| 618 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 619 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 623 | * Check implicit and explicit ALUA state change request. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 624 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 625 | static sense_reason_t |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 626 | core_alua_check_transition(int state, int valid, int *primary) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 627 | { |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 628 | /* |
| 629 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are |
| 630 | * defined as primary target port asymmetric access states. |
| 631 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 632 | switch (state) { |
Hannes Reinecke | 73f3bf5 | 2013-11-19 09:07:48 +0100 | [diff] [blame] | 633 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 634 | if (!(valid & ALUA_AO_SUP)) |
| 635 | goto not_supported; |
| 636 | *primary = 1; |
| 637 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 638 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 639 | if (!(valid & ALUA_AN_SUP)) |
| 640 | goto not_supported; |
| 641 | *primary = 1; |
| 642 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 643 | case ALUA_ACCESS_STATE_STANDBY: |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 644 | if (!(valid & ALUA_S_SUP)) |
| 645 | goto not_supported; |
| 646 | *primary = 1; |
| 647 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 648 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 649 | if (!(valid & ALUA_U_SUP)) |
| 650 | goto not_supported; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 651 | *primary = 1; |
| 652 | break; |
| 653 | case ALUA_ACCESS_STATE_OFFLINE: |
| 654 | /* |
| 655 | * OFFLINE state is defined as a secondary target port |
| 656 | * asymmetric access state. |
| 657 | */ |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 658 | if (!(valid & ALUA_O_SUP)) |
| 659 | goto not_supported; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 660 | *primary = 0; |
| 661 | break; |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 662 | case ALUA_ACCESS_STATE_TRANSITION: |
| 663 | /* |
| 664 | * Transitioning is set internally, and |
| 665 | * cannot be selected manually. |
| 666 | */ |
| 667 | goto not_supported; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 668 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 669 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 670 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | return 0; |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 674 | |
| 675 | not_supported: |
| 676 | pr_err("ALUA access state %s not supported", |
| 677 | core_alua_dump_state(state)); |
| 678 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | static char *core_alua_dump_state(int state) |
| 682 | { |
| 683 | switch (state) { |
Hannes Reinecke | 73f3bf5 | 2013-11-19 09:07:48 +0100 | [diff] [blame] | 684 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 685 | return "Active/Optimized"; |
| 686 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
| 687 | return "Active/NonOptimized"; |
| 688 | case ALUA_ACCESS_STATE_STANDBY: |
| 689 | return "Standby"; |
| 690 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
| 691 | return "Unavailable"; |
| 692 | case ALUA_ACCESS_STATE_OFFLINE: |
| 693 | return "Offline"; |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 694 | case ALUA_ACCESS_STATE_TRANSITION: |
| 695 | return "Transitioning"; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 696 | default: |
| 697 | return "Unknown"; |
| 698 | } |
| 699 | |
| 700 | return NULL; |
| 701 | } |
| 702 | |
| 703 | char *core_alua_dump_status(int status) |
| 704 | { |
| 705 | switch (status) { |
| 706 | case ALUA_STATUS_NONE: |
| 707 | return "None"; |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 708 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
| 709 | return "Altered by Explicit STPG"; |
| 710 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: |
| 711 | return "Altered by Implicit ALUA"; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 712 | default: |
| 713 | return "Unknown"; |
| 714 | } |
| 715 | |
| 716 | return NULL; |
| 717 | } |
| 718 | |
| 719 | /* |
| 720 | * Used by fabric modules to determine when we need to delay processing |
| 721 | * for the Active/NonOptimized paths.. |
| 722 | */ |
| 723 | int core_alua_check_nonop_delay( |
| 724 | struct se_cmd *cmd) |
| 725 | { |
| 726 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) |
| 727 | return 0; |
| 728 | if (in_interrupt()) |
| 729 | return 0; |
| 730 | /* |
| 731 | * The ALUA Active/NonOptimized access state delay can be disabled |
| 732 | * in via configfs with a value of zero |
| 733 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 734 | if (!cmd->alua_nonop_delay) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 735 | return 0; |
| 736 | /* |
| 737 | * struct se_cmd->alua_nonop_delay gets set by a target port group |
| 738 | * defined interval in core_alua_state_nonoptimized() |
| 739 | */ |
| 740 | msleep_interruptible(cmd->alua_nonop_delay); |
| 741 | return 0; |
| 742 | } |
| 743 | EXPORT_SYMBOL(core_alua_check_nonop_delay); |
| 744 | |
| 745 | /* |
| 746 | * Called with tg_pt_gp->tg_pt_gp_md_mutex or tg_pt_gp_mem->sep_tg_pt_md_mutex |
| 747 | * |
| 748 | */ |
| 749 | static int core_alua_write_tpg_metadata( |
| 750 | const char *path, |
| 751 | unsigned char *md_buf, |
| 752 | u32 md_buf_len) |
| 753 | { |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 754 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
| 755 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 756 | |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 757 | if (IS_ERR(file)) { |
| 758 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 759 | return -ENODEV; |
| 760 | } |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 761 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
| 762 | if (ret < 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 763 | pr_err("Error writing ALUA metadata file: %s\n", path); |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 764 | fput(file); |
Gera Kazakov | f730f91 | 2013-09-09 15:47:06 -0700 | [diff] [blame] | 765 | return (ret < 0) ? -EIO : 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* |
| 769 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held |
| 770 | */ |
| 771 | static int core_alua_update_tpg_primary_metadata( |
| 772 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 773 | int primary_state) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 774 | { |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 775 | unsigned char *md_buf; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 776 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 777 | char path[ALUA_METADATA_PATH_LEN]; |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 778 | int len, rc; |
| 779 | |
| 780 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
| 781 | if (!md_buf) { |
| 782 | pr_err("Unable to allocate buf for ALUA metadata\n"); |
| 783 | return -ENOMEM; |
| 784 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 785 | |
| 786 | memset(path, 0, ALUA_METADATA_PATH_LEN); |
| 787 | |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 788 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 789 | "tg_pt_gp_id=%hu\n" |
| 790 | "alua_access_state=0x%02x\n" |
| 791 | "alua_access_status=0x%02x\n", |
| 792 | tg_pt_gp->tg_pt_gp_id, primary_state, |
| 793 | tg_pt_gp->tg_pt_gp_alua_access_status); |
| 794 | |
| 795 | snprintf(path, ALUA_METADATA_PATH_LEN, |
| 796 | "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0], |
| 797 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); |
| 798 | |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 799 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
| 800 | kfree(md_buf); |
| 801 | return rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 802 | } |
| 803 | |
| 804 | static int core_alua_do_transition_tg_pt( |
| 805 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 806 | struct se_port *l_port, |
| 807 | struct se_node_acl *nacl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 808 | int new_state, |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 809 | int explicit) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 810 | { |
| 811 | struct se_dev_entry *se_deve; |
| 812 | struct se_lun_acl *lacl; |
| 813 | struct se_port *port; |
| 814 | struct t10_alua_tg_pt_gp_member *mem; |
Hannes Reinecke | dfbce75 | 2013-12-17 09:18:45 +0100 | [diff] [blame^] | 815 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 816 | /* |
| 817 | * Save the old primary ALUA access state, and set the current state |
| 818 | * to ALUA_ACCESS_STATE_TRANSITION. |
| 819 | */ |
Hannes Reinecke | dfbce75 | 2013-12-17 09:18:45 +0100 | [diff] [blame^] | 820 | tg_pt_gp->tg_pt_gp_alua_previous_state = |
| 821 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); |
| 822 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; |
| 823 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 824 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
| 825 | ALUA_ACCESS_STATE_TRANSITION); |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 826 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? |
| 827 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
| 828 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 829 | /* |
| 830 | * Check for the optional ALUA primary state transition delay |
| 831 | */ |
| 832 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) |
| 833 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); |
| 834 | |
| 835 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 836 | list_for_each_entry(mem, &tg_pt_gp->tg_pt_gp_mem_list, |
| 837 | tg_pt_gp_mem_list) { |
| 838 | port = mem->tg_pt; |
| 839 | /* |
| 840 | * After an implicit target port asymmetric access state |
| 841 | * change, a device server shall establish a unit attention |
| 842 | * condition for the initiator port associated with every I_T |
| 843 | * nexus with the additional sense code set to ASYMMETRIC |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 844 | * ACCESS STATE CHANGED. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 845 | * |
| 846 | * After an explicit target port asymmetric access state |
| 847 | * change, a device server shall establish a unit attention |
| 848 | * condition with the additional sense code set to ASYMMETRIC |
| 849 | * ACCESS STATE CHANGED for the initiator port associated with |
| 850 | * every I_T nexus other than the I_T nexus on which the SET |
| 851 | * TARGET PORT GROUPS command |
| 852 | */ |
| 853 | atomic_inc(&mem->tg_pt_gp_mem_ref_cnt); |
| 854 | smp_mb__after_atomic_inc(); |
| 855 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 856 | |
| 857 | spin_lock_bh(&port->sep_alua_lock); |
| 858 | list_for_each_entry(se_deve, &port->sep_alua_list, |
| 859 | alua_port_list) { |
| 860 | lacl = se_deve->se_lun_acl; |
| 861 | /* |
| 862 | * se_deve->se_lun_acl pointer may be NULL for a |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 863 | * entry created without explicit Node+MappedLUN ACLs |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 864 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 865 | if (!lacl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 866 | continue; |
| 867 | |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 868 | if (explicit && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 869 | (nacl != NULL) && (nacl == lacl->se_lun_nacl) && |
| 870 | (l_port != NULL) && (l_port == port)) |
| 871 | continue; |
| 872 | |
| 873 | core_scsi3_ua_allocate(lacl->se_lun_nacl, |
| 874 | se_deve->mapped_lun, 0x2A, |
| 875 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); |
| 876 | } |
| 877 | spin_unlock_bh(&port->sep_alua_lock); |
| 878 | |
| 879 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 880 | atomic_dec(&mem->tg_pt_gp_mem_ref_cnt); |
| 881 | smp_mb__after_atomic_dec(); |
| 882 | } |
| 883 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 884 | /* |
| 885 | * Update the ALUA metadata buf that has been allocated in |
| 886 | * core_alua_do_port_transition(), this metadata will be written |
| 887 | * to struct file. |
| 888 | * |
| 889 | * Note that there is the case where we do not want to update the |
| 890 | * metadata when the saved metadata is being parsed in userspace |
| 891 | * when setting the existing port access state and access status. |
| 892 | * |
| 893 | * Also note that the failure to write out the ALUA metadata to |
| 894 | * struct file does NOT affect the actual ALUA transition. |
| 895 | */ |
| 896 | if (tg_pt_gp->tg_pt_gp_write_metadata) { |
| 897 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 898 | core_alua_update_tpg_primary_metadata(tg_pt_gp, new_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 899 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
| 900 | } |
| 901 | /* |
| 902 | * Set the current primary ALUA access state to the requested new state |
| 903 | */ |
Hannes Reinecke | dfbce75 | 2013-12-17 09:18:45 +0100 | [diff] [blame^] | 904 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
| 905 | tg_pt_gp->tg_pt_gp_alua_pending_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 906 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 907 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 908 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
| 909 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), |
Hannes Reinecke | dfbce75 | 2013-12-17 09:18:45 +0100 | [diff] [blame^] | 910 | tg_pt_gp->tg_pt_gp_id, |
| 911 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), |
| 912 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 913 | |
| 914 | return 0; |
| 915 | } |
| 916 | |
| 917 | int core_alua_do_port_transition( |
| 918 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, |
| 919 | struct se_device *l_dev, |
| 920 | struct se_port *l_port, |
| 921 | struct se_node_acl *l_nacl, |
| 922 | int new_state, |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 923 | int explicit) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 924 | { |
| 925 | struct se_device *dev; |
| 926 | struct se_port *port; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 927 | struct se_node_acl *nacl; |
| 928 | struct t10_alua_lu_gp *lu_gp; |
| 929 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; |
| 930 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 931 | int primary, valid_states; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 932 | |
Hannes Reinecke | bb91c1a | 2013-12-17 09:18:43 +0100 | [diff] [blame] | 933 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
| 934 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 935 | return -EINVAL; |
| 936 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 937 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
| 938 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); |
| 939 | lu_gp = local_lu_gp_mem->lu_gp; |
| 940 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
| 941 | smp_mb__after_atomic_inc(); |
| 942 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
| 943 | /* |
| 944 | * For storage objects that are members of the 'default_lu_gp', |
| 945 | * we only do transition on the passed *l_tp_pt_gp, and not |
| 946 | * on all of the matching target port groups IDs in default_lu_gp. |
| 947 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 948 | if (!lu_gp->lu_gp_id) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 949 | /* |
| 950 | * core_alua_do_transition_tg_pt() will always return |
| 951 | * success. |
| 952 | */ |
| 953 | core_alua_do_transition_tg_pt(l_tg_pt_gp, l_port, l_nacl, |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 954 | new_state, explicit); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 955 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
| 956 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 957 | return 0; |
| 958 | } |
| 959 | /* |
| 960 | * For all other LU groups aside from 'default_lu_gp', walk all of |
| 961 | * the associated storage objects looking for a matching target port |
| 962 | * group ID from the local target port group. |
| 963 | */ |
| 964 | spin_lock(&lu_gp->lu_gp_lock); |
| 965 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, |
| 966 | lu_gp_mem_list) { |
| 967 | |
| 968 | dev = lu_gp_mem->lu_gp_mem_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 969 | atomic_inc(&lu_gp_mem->lu_gp_mem_ref_cnt); |
| 970 | smp_mb__after_atomic_inc(); |
| 971 | spin_unlock(&lu_gp->lu_gp_lock); |
| 972 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 973 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 974 | list_for_each_entry(tg_pt_gp, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 975 | &dev->t10_alua.tg_pt_gps_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 976 | tg_pt_gp_list) { |
| 977 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 978 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 979 | continue; |
| 980 | /* |
| 981 | * If the target behavior port asymmetric access state |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 982 | * is changed for any target port group accessible via |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 983 | * a logical unit within a LU group, the target port |
| 984 | * behavior group asymmetric access states for the same |
| 985 | * target port group accessible via other logical units |
| 986 | * in that LU group will also change. |
| 987 | */ |
| 988 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) |
| 989 | continue; |
| 990 | |
| 991 | if (l_tg_pt_gp == tg_pt_gp) { |
| 992 | port = l_port; |
| 993 | nacl = l_nacl; |
| 994 | } else { |
| 995 | port = NULL; |
| 996 | nacl = NULL; |
| 997 | } |
| 998 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
| 999 | smp_mb__after_atomic_inc(); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1000 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1001 | /* |
| 1002 | * core_alua_do_transition_tg_pt() will always return |
| 1003 | * success. |
| 1004 | */ |
| 1005 | core_alua_do_transition_tg_pt(tg_pt_gp, port, |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1006 | nacl, new_state, explicit); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1007 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1008 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1009 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
| 1010 | smp_mb__after_atomic_dec(); |
| 1011 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1012 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1013 | |
| 1014 | spin_lock(&lu_gp->lu_gp_lock); |
| 1015 | atomic_dec(&lu_gp_mem->lu_gp_mem_ref_cnt); |
| 1016 | smp_mb__after_atomic_dec(); |
| 1017 | } |
| 1018 | spin_unlock(&lu_gp->lu_gp_lock); |
| 1019 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1020 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1021 | " Group IDs: %hu %s transition to primary state: %s\n", |
| 1022 | config_item_name(&lu_gp->lu_gp_group.cg_item), |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1023 | l_tg_pt_gp->tg_pt_gp_id, (explicit) ? "explicit" : "implicit", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1024 | core_alua_dump_state(new_state)); |
| 1025 | |
| 1026 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
| 1027 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1028 | return 0; |
| 1029 | } |
| 1030 | |
| 1031 | /* |
| 1032 | * Called with tg_pt_gp_mem->sep_tg_pt_md_mutex held |
| 1033 | */ |
| 1034 | static int core_alua_update_tpg_secondary_metadata( |
| 1035 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1036 | struct se_port *port) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1037 | { |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1038 | unsigned char *md_buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1039 | struct se_portal_group *se_tpg = port->sep_tpg; |
| 1040 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1041 | int len, rc; |
| 1042 | |
| 1043 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
| 1044 | if (!md_buf) { |
| 1045 | pr_err("Unable to allocate buf for ALUA metadata\n"); |
| 1046 | return -ENOMEM; |
| 1047 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1048 | |
| 1049 | memset(path, 0, ALUA_METADATA_PATH_LEN); |
| 1050 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); |
| 1051 | |
| 1052 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1053 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1054 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1055 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1056 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1057 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1058 | |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1059 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1060 | "alua_tg_pt_status=0x%02x\n", |
| 1061 | atomic_read(&port->sep_tg_pt_secondary_offline), |
| 1062 | port->sep_tg_pt_secondary_stat); |
| 1063 | |
| 1064 | snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%u", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1065 | se_tpg->se_tpg_tfo->get_fabric_name(), wwn, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1066 | port->sep_lun->unpacked_lun); |
| 1067 | |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1068 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
| 1069 | kfree(md_buf); |
| 1070 | |
| 1071 | return rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1072 | } |
| 1073 | |
| 1074 | static int core_alua_set_tg_pt_secondary_state( |
| 1075 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, |
| 1076 | struct se_port *port, |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1077 | int explicit, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1078 | int offline) |
| 1079 | { |
| 1080 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1081 | int trans_delay_msecs; |
| 1082 | |
| 1083 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1084 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1085 | if (!tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1086 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1087 | pr_err("Unable to complete secondary state" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1088 | " transition\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1089 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1090 | } |
| 1091 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; |
| 1092 | /* |
| 1093 | * Set the secondary ALUA target port access state to OFFLINE |
| 1094 | * or release the previously secondary state for struct se_port |
| 1095 | */ |
| 1096 | if (offline) |
| 1097 | atomic_set(&port->sep_tg_pt_secondary_offline, 1); |
| 1098 | else |
| 1099 | atomic_set(&port->sep_tg_pt_secondary_offline, 0); |
| 1100 | |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1101 | port->sep_tg_pt_secondary_stat = (explicit) ? |
| 1102 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
| 1103 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1104 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1105 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1106 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
| 1107 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1108 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
| 1109 | |
| 1110 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1111 | /* |
| 1112 | * Do the optional transition delay after we set the secondary |
| 1113 | * ALUA access state. |
| 1114 | */ |
| 1115 | if (trans_delay_msecs != 0) |
| 1116 | msleep_interruptible(trans_delay_msecs); |
| 1117 | /* |
| 1118 | * See if we need to update the ALUA fabric port metadata for |
| 1119 | * secondary state and status |
| 1120 | */ |
| 1121 | if (port->sep_tg_pt_secondary_write_md) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1122 | mutex_lock(&port->sep_tg_pt_md_mutex); |
Hannes Reinecke | 1e0b940 | 2013-12-17 09:18:44 +0100 | [diff] [blame] | 1123 | core_alua_update_tpg_secondary_metadata(tg_pt_gp_mem, port); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1124 | mutex_unlock(&port->sep_tg_pt_md_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1125 | } |
| 1126 | |
| 1127 | return 0; |
| 1128 | } |
| 1129 | |
| 1130 | struct t10_alua_lu_gp * |
| 1131 | core_alua_allocate_lu_gp(const char *name, int def_group) |
| 1132 | { |
| 1133 | struct t10_alua_lu_gp *lu_gp; |
| 1134 | |
| 1135 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1136 | if (!lu_gp) { |
| 1137 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); |
Justin P. Mattock | 6eab04a | 2011-04-08 19:49:08 -0700 | [diff] [blame] | 1138 | return ERR_PTR(-ENOMEM); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1139 | } |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1140 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1141 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
| 1142 | spin_lock_init(&lu_gp->lu_gp_lock); |
| 1143 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); |
| 1144 | |
| 1145 | if (def_group) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1146 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1147 | lu_gp->lu_gp_valid_id = 1; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1148 | alua_lu_gps_count++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | return lu_gp; |
| 1152 | } |
| 1153 | |
| 1154 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) |
| 1155 | { |
| 1156 | struct t10_alua_lu_gp *lu_gp_tmp; |
| 1157 | u16 lu_gp_id_tmp; |
| 1158 | /* |
| 1159 | * The lu_gp->lu_gp_id may only be set once.. |
| 1160 | */ |
| 1161 | if (lu_gp->lu_gp_valid_id) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1162 | pr_warn("ALUA LU Group already has a valid ID," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1163 | " ignoring request\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1164 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1165 | } |
| 1166 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1167 | spin_lock(&lu_gps_lock); |
| 1168 | if (alua_lu_gps_count == 0x0000ffff) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1169 | pr_err("Maximum ALUA alua_lu_gps_count:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1170 | " 0x0000ffff reached\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1171 | spin_unlock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1172 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1173 | return -ENOSPC; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1174 | } |
| 1175 | again: |
| 1176 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1177 | alua_lu_gps_counter++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1178 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1179 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1180 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1181 | if (!lu_gp_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1182 | goto again; |
| 1183 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1184 | pr_warn("ALUA Logical Unit Group ID: %hu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1185 | " already exists, ignoring request\n", |
| 1186 | lu_gp_id); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1187 | spin_unlock(&lu_gps_lock); |
| 1188 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1189 | } |
| 1190 | } |
| 1191 | |
| 1192 | lu_gp->lu_gp_id = lu_gp_id_tmp; |
| 1193 | lu_gp->lu_gp_valid_id = 1; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1194 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
| 1195 | alua_lu_gps_count++; |
| 1196 | spin_unlock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1197 | |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
| 1201 | static struct t10_alua_lu_gp_member * |
| 1202 | core_alua_allocate_lu_gp_mem(struct se_device *dev) |
| 1203 | { |
| 1204 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 1205 | |
| 1206 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1207 | if (!lu_gp_mem) { |
| 1208 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1209 | return ERR_PTR(-ENOMEM); |
| 1210 | } |
| 1211 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); |
| 1212 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); |
| 1213 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); |
| 1214 | |
| 1215 | lu_gp_mem->lu_gp_mem_dev = dev; |
| 1216 | dev->dev_alua_lu_gp_mem = lu_gp_mem; |
| 1217 | |
| 1218 | return lu_gp_mem; |
| 1219 | } |
| 1220 | |
| 1221 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) |
| 1222 | { |
| 1223 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; |
| 1224 | /* |
| 1225 | * Once we have reached this point, config_item_put() has |
| 1226 | * already been called from target_core_alua_drop_lu_gp(). |
| 1227 | * |
| 1228 | * Here, we remove the *lu_gp from the global list so that |
| 1229 | * no associations can be made while we are releasing |
| 1230 | * struct t10_alua_lu_gp. |
| 1231 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1232 | spin_lock(&lu_gps_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1233 | list_del(&lu_gp->lu_gp_node); |
| 1234 | alua_lu_gps_count--; |
| 1235 | spin_unlock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1236 | /* |
| 1237 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() |
| 1238 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be |
| 1239 | * released with core_alua_put_lu_gp_from_name() |
| 1240 | */ |
| 1241 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) |
| 1242 | cpu_relax(); |
| 1243 | /* |
| 1244 | * Release reference to struct t10_alua_lu_gp * from all associated |
| 1245 | * struct se_device. |
| 1246 | */ |
| 1247 | spin_lock(&lu_gp->lu_gp_lock); |
| 1248 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, |
| 1249 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { |
| 1250 | if (lu_gp_mem->lu_gp_assoc) { |
| 1251 | list_del(&lu_gp_mem->lu_gp_mem_list); |
| 1252 | lu_gp->lu_gp_members--; |
| 1253 | lu_gp_mem->lu_gp_assoc = 0; |
| 1254 | } |
| 1255 | spin_unlock(&lu_gp->lu_gp_lock); |
| 1256 | /* |
| 1257 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1258 | * lu_gp_mem is associated with a single |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1259 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
| 1260 | * struct se_device is released via core_alua_free_lu_gp_mem(). |
| 1261 | * |
| 1262 | * If the passed lu_gp does NOT match the default_lu_gp, assume |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 1263 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1264 | */ |
| 1265 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1266 | if (lu_gp != default_lu_gp) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1267 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1268 | default_lu_gp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1269 | else |
| 1270 | lu_gp_mem->lu_gp = NULL; |
| 1271 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 1272 | |
| 1273 | spin_lock(&lu_gp->lu_gp_lock); |
| 1274 | } |
| 1275 | spin_unlock(&lu_gp->lu_gp_lock); |
| 1276 | |
| 1277 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
| 1278 | } |
| 1279 | |
| 1280 | void core_alua_free_lu_gp_mem(struct se_device *dev) |
| 1281 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1282 | struct t10_alua_lu_gp *lu_gp; |
| 1283 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 1284 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1285 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1286 | if (!lu_gp_mem) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1287 | return; |
| 1288 | |
| 1289 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) |
| 1290 | cpu_relax(); |
| 1291 | |
| 1292 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 1293 | lu_gp = lu_gp_mem->lu_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1294 | if (lu_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1295 | spin_lock(&lu_gp->lu_gp_lock); |
| 1296 | if (lu_gp_mem->lu_gp_assoc) { |
| 1297 | list_del(&lu_gp_mem->lu_gp_mem_list); |
| 1298 | lu_gp->lu_gp_members--; |
| 1299 | lu_gp_mem->lu_gp_assoc = 0; |
| 1300 | } |
| 1301 | spin_unlock(&lu_gp->lu_gp_lock); |
| 1302 | lu_gp_mem->lu_gp = NULL; |
| 1303 | } |
| 1304 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 1305 | |
| 1306 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); |
| 1307 | } |
| 1308 | |
| 1309 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) |
| 1310 | { |
| 1311 | struct t10_alua_lu_gp *lu_gp; |
| 1312 | struct config_item *ci; |
| 1313 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1314 | spin_lock(&lu_gps_lock); |
| 1315 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1316 | if (!lu_gp->lu_gp_valid_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1317 | continue; |
| 1318 | ci = &lu_gp->lu_gp_group.cg_item; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1319 | if (!strcmp(config_item_name(ci), name)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1320 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1321 | spin_unlock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1322 | return lu_gp; |
| 1323 | } |
| 1324 | } |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1325 | spin_unlock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1326 | |
| 1327 | return NULL; |
| 1328 | } |
| 1329 | |
| 1330 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) |
| 1331 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1332 | spin_lock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1333 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1334 | spin_unlock(&lu_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1335 | } |
| 1336 | |
| 1337 | /* |
| 1338 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock |
| 1339 | */ |
| 1340 | void __core_alua_attach_lu_gp_mem( |
| 1341 | struct t10_alua_lu_gp_member *lu_gp_mem, |
| 1342 | struct t10_alua_lu_gp *lu_gp) |
| 1343 | { |
| 1344 | spin_lock(&lu_gp->lu_gp_lock); |
| 1345 | lu_gp_mem->lu_gp = lu_gp; |
| 1346 | lu_gp_mem->lu_gp_assoc = 1; |
| 1347 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); |
| 1348 | lu_gp->lu_gp_members++; |
| 1349 | spin_unlock(&lu_gp->lu_gp_lock); |
| 1350 | } |
| 1351 | |
| 1352 | /* |
| 1353 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock |
| 1354 | */ |
| 1355 | void __core_alua_drop_lu_gp_mem( |
| 1356 | struct t10_alua_lu_gp_member *lu_gp_mem, |
| 1357 | struct t10_alua_lu_gp *lu_gp) |
| 1358 | { |
| 1359 | spin_lock(&lu_gp->lu_gp_lock); |
| 1360 | list_del(&lu_gp_mem->lu_gp_mem_list); |
| 1361 | lu_gp_mem->lu_gp = NULL; |
| 1362 | lu_gp_mem->lu_gp_assoc = 0; |
| 1363 | lu_gp->lu_gp_members--; |
| 1364 | spin_unlock(&lu_gp->lu_gp_lock); |
| 1365 | } |
| 1366 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1367 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
| 1368 | const char *name, int def_group) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1369 | { |
| 1370 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 1371 | |
| 1372 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1373 | if (!tg_pt_gp) { |
| 1374 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1375 | return NULL; |
| 1376 | } |
| 1377 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); |
| 1378 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_mem_list); |
| 1379 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); |
| 1380 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); |
| 1381 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1382 | tg_pt_gp->tg_pt_gp_dev = dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1383 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
Hannes Reinecke | 73f3bf5 | 2013-11-19 09:07:48 +0100 | [diff] [blame] | 1384 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1385 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1386 | * Enable both explicit and implicit ALUA support by default |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1387 | */ |
| 1388 | tg_pt_gp->tg_pt_gp_alua_access_type = |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1389 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1390 | /* |
| 1391 | * Set the default Active/NonOptimized Delay in milliseconds |
| 1392 | */ |
| 1393 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; |
| 1394 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1395 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1396 | |
Hannes Reinecke | c0dc941 | 2013-11-19 09:07:49 +0100 | [diff] [blame] | 1397 | /* |
| 1398 | * Enable all supported states |
| 1399 | */ |
| 1400 | tg_pt_gp->tg_pt_gp_alua_supported_states = |
| 1401 | ALUA_T_SUP | ALUA_O_SUP | |
| 1402 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; |
| 1403 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1404 | if (def_group) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1405 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1406 | tg_pt_gp->tg_pt_gp_id = |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1407 | dev->t10_alua.alua_tg_pt_gps_counter++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1408 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1409 | dev->t10_alua.alua_tg_pt_gps_count++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1410 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1411 | &dev->t10_alua.tg_pt_gps_list); |
| 1412 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1413 | } |
| 1414 | |
| 1415 | return tg_pt_gp; |
| 1416 | } |
| 1417 | |
| 1418 | int core_alua_set_tg_pt_gp_id( |
| 1419 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1420 | u16 tg_pt_gp_id) |
| 1421 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1422 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1423 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
| 1424 | u16 tg_pt_gp_id_tmp; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1425 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1426 | /* |
| 1427 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. |
| 1428 | */ |
| 1429 | if (tg_pt_gp->tg_pt_gp_valid_id) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1430 | pr_warn("ALUA TG PT Group already has a valid ID," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1431 | " ignoring request\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1432 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1433 | } |
| 1434 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1435 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
| 1436 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1437 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1438 | " 0x0000ffff reached\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1439 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1440 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1441 | return -ENOSPC; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1442 | } |
| 1443 | again: |
| 1444 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1445 | dev->t10_alua.alua_tg_pt_gps_counter++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1446 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1447 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1448 | tg_pt_gp_list) { |
| 1449 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1450 | if (!tg_pt_gp_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1451 | goto again; |
| 1452 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1453 | pr_err("ALUA Target Port Group ID: %hu already" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1454 | " exists, ignoring request\n", tg_pt_gp_id); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1455 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1456 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; |
| 1461 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
| 1462 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1463 | &dev->t10_alua.tg_pt_gps_list); |
| 1464 | dev->t10_alua.alua_tg_pt_gps_count++; |
| 1465 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1466 | |
| 1467 | return 0; |
| 1468 | } |
| 1469 | |
| 1470 | struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem( |
| 1471 | struct se_port *port) |
| 1472 | { |
| 1473 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 1474 | |
| 1475 | tg_pt_gp_mem = kmem_cache_zalloc(t10_alua_tg_pt_gp_mem_cache, |
| 1476 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1477 | if (!tg_pt_gp_mem) { |
| 1478 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp_member\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1479 | return ERR_PTR(-ENOMEM); |
| 1480 | } |
| 1481 | INIT_LIST_HEAD(&tg_pt_gp_mem->tg_pt_gp_mem_list); |
| 1482 | spin_lock_init(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1483 | atomic_set(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt, 0); |
| 1484 | |
| 1485 | tg_pt_gp_mem->tg_pt = port; |
| 1486 | port->sep_alua_tg_pt_gp_mem = tg_pt_gp_mem; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1487 | |
| 1488 | return tg_pt_gp_mem; |
| 1489 | } |
| 1490 | |
| 1491 | void core_alua_free_tg_pt_gp( |
| 1492 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
| 1493 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1494 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1495 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1496 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1497 | /* |
| 1498 | * Once we have reached this point, config_item_put() has already |
| 1499 | * been called from target_core_alua_drop_tg_pt_gp(). |
| 1500 | * |
| 1501 | * Here we remove *tg_pt_gp from the global list so that |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 1502 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1503 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
| 1504 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1505 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1506 | list_del(&tg_pt_gp->tg_pt_gp_list); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1507 | dev->t10_alua.alua_tg_pt_gps_counter--; |
| 1508 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
| 1509 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1510 | /* |
| 1511 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by |
| 1512 | * core_alua_get_tg_pt_gp_by_name() in |
| 1513 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() |
| 1514 | * to be released with core_alua_put_tg_pt_gp_from_name(). |
| 1515 | */ |
| 1516 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) |
| 1517 | cpu_relax(); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1518 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1519 | /* |
| 1520 | * Release reference to struct t10_alua_tg_pt_gp from all associated |
| 1521 | * struct se_port. |
| 1522 | */ |
| 1523 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 1524 | list_for_each_entry_safe(tg_pt_gp_mem, tg_pt_gp_mem_tmp, |
| 1525 | &tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) { |
| 1526 | if (tg_pt_gp_mem->tg_pt_gp_assoc) { |
| 1527 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); |
| 1528 | tg_pt_gp->tg_pt_gp_members--; |
| 1529 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; |
| 1530 | } |
| 1531 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 1532 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1533 | * tg_pt_gp_mem is associated with a single |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1534 | * se_port->sep_alua_tg_pt_gp_mem, and is released via |
| 1535 | * core_alua_free_tg_pt_gp_mem(). |
| 1536 | * |
| 1537 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
Hannes Reinecke | f1ae05d | 2013-11-19 09:07:47 +0100 | [diff] [blame] | 1538 | * assume we want to re-associate a given tg_pt_gp_mem with |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1539 | * default_tg_pt_gp. |
| 1540 | */ |
| 1541 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1542 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1543 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1544 | dev->t10_alua.default_tg_pt_gp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1545 | } else |
| 1546 | tg_pt_gp_mem->tg_pt_gp = NULL; |
| 1547 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1548 | |
| 1549 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 1550 | } |
| 1551 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 1552 | |
| 1553 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
| 1554 | } |
| 1555 | |
| 1556 | void core_alua_free_tg_pt_gp_mem(struct se_port *port) |
| 1557 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1558 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 1559 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 1560 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1561 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1562 | if (!tg_pt_gp_mem) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1563 | return; |
| 1564 | |
| 1565 | while (atomic_read(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt)) |
| 1566 | cpu_relax(); |
| 1567 | |
| 1568 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1569 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1570 | if (tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1571 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 1572 | if (tg_pt_gp_mem->tg_pt_gp_assoc) { |
| 1573 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); |
| 1574 | tg_pt_gp->tg_pt_gp_members--; |
| 1575 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; |
| 1576 | } |
| 1577 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 1578 | tg_pt_gp_mem->tg_pt_gp = NULL; |
| 1579 | } |
| 1580 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1581 | |
| 1582 | kmem_cache_free(t10_alua_tg_pt_gp_mem_cache, tg_pt_gp_mem); |
| 1583 | } |
| 1584 | |
| 1585 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1586 | struct se_device *dev, const char *name) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1587 | { |
| 1588 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 1589 | struct config_item *ci; |
| 1590 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1591 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
| 1592 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1593 | tg_pt_gp_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1594 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1595 | continue; |
| 1596 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1597 | if (!strcmp(config_item_name(ci), name)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1598 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1599 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1600 | return tg_pt_gp; |
| 1601 | } |
| 1602 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1603 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1604 | |
| 1605 | return NULL; |
| 1606 | } |
| 1607 | |
| 1608 | static void core_alua_put_tg_pt_gp_from_name( |
| 1609 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
| 1610 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1611 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1612 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1613 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1614 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1615 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1616 | } |
| 1617 | |
| 1618 | /* |
| 1619 | * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held |
| 1620 | */ |
| 1621 | void __core_alua_attach_tg_pt_gp_mem( |
| 1622 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, |
| 1623 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
| 1624 | { |
| 1625 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 1626 | tg_pt_gp_mem->tg_pt_gp = tg_pt_gp; |
| 1627 | tg_pt_gp_mem->tg_pt_gp_assoc = 1; |
| 1628 | list_add_tail(&tg_pt_gp_mem->tg_pt_gp_mem_list, |
| 1629 | &tg_pt_gp->tg_pt_gp_mem_list); |
| 1630 | tg_pt_gp->tg_pt_gp_members++; |
| 1631 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 1632 | } |
| 1633 | |
| 1634 | /* |
| 1635 | * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held |
| 1636 | */ |
| 1637 | static void __core_alua_drop_tg_pt_gp_mem( |
| 1638 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, |
| 1639 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
| 1640 | { |
| 1641 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| 1642 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); |
| 1643 | tg_pt_gp_mem->tg_pt_gp = NULL; |
| 1644 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; |
| 1645 | tg_pt_gp->tg_pt_gp_members--; |
| 1646 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
| 1647 | } |
| 1648 | |
| 1649 | ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page) |
| 1650 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1651 | struct config_item *tg_pt_ci; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1652 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 1653 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 1654 | ssize_t len = 0; |
| 1655 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1656 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1657 | if (!tg_pt_gp_mem) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1658 | return len; |
| 1659 | |
| 1660 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1661 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1662 | if (tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1663 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
| 1664 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" |
| 1665 | " %hu\nTG Port Primary Access State: %s\nTG Port " |
| 1666 | "Primary Access Status: %s\nTG Port Secondary Access" |
| 1667 | " State: %s\nTG Port Secondary Access Status: %s\n", |
| 1668 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, |
| 1669 | core_alua_dump_state(atomic_read( |
| 1670 | &tg_pt_gp->tg_pt_gp_alua_access_state)), |
| 1671 | core_alua_dump_status( |
| 1672 | tg_pt_gp->tg_pt_gp_alua_access_status), |
| 1673 | (atomic_read(&port->sep_tg_pt_secondary_offline)) ? |
| 1674 | "Offline" : "None", |
| 1675 | core_alua_dump_status(port->sep_tg_pt_secondary_stat)); |
| 1676 | } |
| 1677 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1678 | |
| 1679 | return len; |
| 1680 | } |
| 1681 | |
| 1682 | ssize_t core_alua_store_tg_pt_gp_info( |
| 1683 | struct se_port *port, |
| 1684 | const char *page, |
| 1685 | size_t count) |
| 1686 | { |
| 1687 | struct se_portal_group *tpg; |
| 1688 | struct se_lun *lun; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1689 | struct se_device *dev = port->sep_lun->lun_se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1690 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
| 1691 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 1692 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
| 1693 | int move = 0; |
| 1694 | |
| 1695 | tpg = port->sep_tpg; |
| 1696 | lun = port->sep_lun; |
| 1697 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1698 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 1699 | if (!tg_pt_gp_mem) |
| 1700 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1701 | |
| 1702 | if (count > TG_PT_GROUP_NAME_BUF) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1703 | pr_err("ALUA Target Port Group alias too large!\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1704 | return -EINVAL; |
| 1705 | } |
| 1706 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); |
| 1707 | memcpy(buf, page, count); |
| 1708 | /* |
| 1709 | * Any ALUA target port group alias besides "NULL" means we will be |
| 1710 | * making a new group association. |
| 1711 | */ |
| 1712 | if (strcmp(strstrip(buf), "NULL")) { |
| 1713 | /* |
| 1714 | * core_alua_get_tg_pt_gp_by_name() will increment reference to |
| 1715 | * struct t10_alua_tg_pt_gp. This reference is released with |
| 1716 | * core_alua_put_tg_pt_gp_from_name() below. |
| 1717 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1718 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1719 | strstrip(buf)); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1720 | if (!tg_pt_gp_new) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1721 | return -ENODEV; |
| 1722 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1723 | |
| 1724 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1725 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1726 | if (tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1727 | /* |
| 1728 | * Clearing an existing tg_pt_gp association, and replacing |
| 1729 | * with the default_tg_pt_gp. |
| 1730 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1731 | if (!tg_pt_gp_new) { |
| 1732 | pr_debug("Target_Core_ConfigFS: Moving" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1733 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
| 1734 | " alua/%s, ID: %hu back to" |
| 1735 | " default_tg_pt_gp\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1736 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
| 1737 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1738 | config_item_name(&lun->lun_group.cg_item), |
| 1739 | config_item_name( |
| 1740 | &tg_pt_gp->tg_pt_gp_group.cg_item), |
| 1741 | tg_pt_gp->tg_pt_gp_id); |
| 1742 | |
| 1743 | __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp); |
| 1744 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1745 | dev->t10_alua.default_tg_pt_gp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1746 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 1747 | |
| 1748 | return count; |
| 1749 | } |
| 1750 | /* |
| 1751 | * Removing existing association of tg_pt_gp_mem with tg_pt_gp |
| 1752 | */ |
| 1753 | __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp); |
| 1754 | move = 1; |
| 1755 | } |
| 1756 | /* |
| 1757 | * Associate tg_pt_gp_mem with tg_pt_gp_new. |
| 1758 | */ |
| 1759 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp_new); |
| 1760 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1761 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1762 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1763 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
| 1764 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1765 | config_item_name(&lun->lun_group.cg_item), |
| 1766 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), |
| 1767 | tg_pt_gp_new->tg_pt_gp_id); |
| 1768 | |
| 1769 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); |
| 1770 | return count; |
| 1771 | } |
| 1772 | |
| 1773 | ssize_t core_alua_show_access_type( |
| 1774 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1775 | char *page) |
| 1776 | { |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1777 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
| 1778 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) |
| 1779 | return sprintf(page, "Implicit and Explicit\n"); |
| 1780 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) |
| 1781 | return sprintf(page, "Implicit\n"); |
| 1782 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) |
| 1783 | return sprintf(page, "Explicit\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1784 | else |
| 1785 | return sprintf(page, "None\n"); |
| 1786 | } |
| 1787 | |
| 1788 | ssize_t core_alua_store_access_type( |
| 1789 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1790 | const char *page, |
| 1791 | size_t count) |
| 1792 | { |
| 1793 | unsigned long tmp; |
| 1794 | int ret; |
| 1795 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1796 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1797 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1798 | pr_err("Unable to extract alua_access_type\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1799 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1800 | } |
| 1801 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1802 | pr_err("Illegal value for alua_access_type:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1803 | " %lu\n", tmp); |
| 1804 | return -EINVAL; |
| 1805 | } |
| 1806 | if (tmp == 3) |
| 1807 | tg_pt_gp->tg_pt_gp_alua_access_type = |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1808 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1809 | else if (tmp == 2) |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1810 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1811 | else if (tmp == 1) |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1812 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1813 | else |
| 1814 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; |
| 1815 | |
| 1816 | return count; |
| 1817 | } |
| 1818 | |
| 1819 | ssize_t core_alua_show_nonop_delay_msecs( |
| 1820 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1821 | char *page) |
| 1822 | { |
| 1823 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); |
| 1824 | } |
| 1825 | |
| 1826 | ssize_t core_alua_store_nonop_delay_msecs( |
| 1827 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1828 | const char *page, |
| 1829 | size_t count) |
| 1830 | { |
| 1831 | unsigned long tmp; |
| 1832 | int ret; |
| 1833 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1834 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1835 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1836 | pr_err("Unable to extract nonop_delay_msecs\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1837 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1838 | } |
| 1839 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1840 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1841 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
| 1842 | ALUA_MAX_NONOP_DELAY_MSECS); |
| 1843 | return -EINVAL; |
| 1844 | } |
| 1845 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; |
| 1846 | |
| 1847 | return count; |
| 1848 | } |
| 1849 | |
| 1850 | ssize_t core_alua_show_trans_delay_msecs( |
| 1851 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1852 | char *page) |
| 1853 | { |
| 1854 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); |
| 1855 | } |
| 1856 | |
| 1857 | ssize_t core_alua_store_trans_delay_msecs( |
| 1858 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1859 | const char *page, |
| 1860 | size_t count) |
| 1861 | { |
| 1862 | unsigned long tmp; |
| 1863 | int ret; |
| 1864 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1865 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1866 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1867 | pr_err("Unable to extract trans_delay_msecs\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1868 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1869 | } |
| 1870 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1871 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1872 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
| 1873 | ALUA_MAX_TRANS_DELAY_MSECS); |
| 1874 | return -EINVAL; |
| 1875 | } |
| 1876 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; |
| 1877 | |
| 1878 | return count; |
| 1879 | } |
| 1880 | |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1881 | ssize_t core_alua_show_implicit_trans_secs( |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1882 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1883 | char *page) |
| 1884 | { |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1885 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1886 | } |
| 1887 | |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1888 | ssize_t core_alua_store_implicit_trans_secs( |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1889 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1890 | const char *page, |
| 1891 | size_t count) |
| 1892 | { |
| 1893 | unsigned long tmp; |
| 1894 | int ret; |
| 1895 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1896 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1897 | if (ret < 0) { |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1898 | pr_err("Unable to extract implicit_trans_secs\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1899 | return ret; |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1900 | } |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1901 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
| 1902 | pr_err("Passed implicit_trans_secs: %lu, exceeds" |
| 1903 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, |
| 1904 | ALUA_MAX_IMPLICIT_TRANS_SECS); |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1905 | return -EINVAL; |
| 1906 | } |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1907 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
Nicholas Bellinger | 5b9a4d7 | 2012-05-16 22:02:34 -0700 | [diff] [blame] | 1908 | |
| 1909 | return count; |
| 1910 | } |
| 1911 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1912 | ssize_t core_alua_show_preferred_bit( |
| 1913 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1914 | char *page) |
| 1915 | { |
| 1916 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); |
| 1917 | } |
| 1918 | |
| 1919 | ssize_t core_alua_store_preferred_bit( |
| 1920 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
| 1921 | const char *page, |
| 1922 | size_t count) |
| 1923 | { |
| 1924 | unsigned long tmp; |
| 1925 | int ret; |
| 1926 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1927 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1928 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1929 | pr_err("Unable to extract preferred ALUA value\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1930 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1931 | } |
| 1932 | if ((tmp != 0) && (tmp != 1)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1933 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1934 | return -EINVAL; |
| 1935 | } |
| 1936 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; |
| 1937 | |
| 1938 | return count; |
| 1939 | } |
| 1940 | |
| 1941 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) |
| 1942 | { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1943 | if (!lun->lun_sep) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1944 | return -ENODEV; |
| 1945 | |
| 1946 | return sprintf(page, "%d\n", |
| 1947 | atomic_read(&lun->lun_sep->sep_tg_pt_secondary_offline)); |
| 1948 | } |
| 1949 | |
| 1950 | ssize_t core_alua_store_offline_bit( |
| 1951 | struct se_lun *lun, |
| 1952 | const char *page, |
| 1953 | size_t count) |
| 1954 | { |
| 1955 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 1956 | unsigned long tmp; |
| 1957 | int ret; |
| 1958 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1959 | if (!lun->lun_sep) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1960 | return -ENODEV; |
| 1961 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1962 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1963 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1964 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 1965 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1966 | } |
| 1967 | if ((tmp != 0) && (tmp != 1)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1968 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1969 | tmp); |
| 1970 | return -EINVAL; |
| 1971 | } |
| 1972 | tg_pt_gp_mem = lun->lun_sep->sep_alua_tg_pt_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1973 | if (!tg_pt_gp_mem) { |
| 1974 | pr_err("Unable to locate *tg_pt_gp_mem\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1975 | return -EINVAL; |
| 1976 | } |
| 1977 | |
| 1978 | ret = core_alua_set_tg_pt_secondary_state(tg_pt_gp_mem, |
| 1979 | lun->lun_sep, 0, (int)tmp); |
| 1980 | if (ret < 0) |
| 1981 | return -EINVAL; |
| 1982 | |
| 1983 | return count; |
| 1984 | } |
| 1985 | |
| 1986 | ssize_t core_alua_show_secondary_status( |
| 1987 | struct se_lun *lun, |
| 1988 | char *page) |
| 1989 | { |
| 1990 | return sprintf(page, "%d\n", lun->lun_sep->sep_tg_pt_secondary_stat); |
| 1991 | } |
| 1992 | |
| 1993 | ssize_t core_alua_store_secondary_status( |
| 1994 | struct se_lun *lun, |
| 1995 | const char *page, |
| 1996 | size_t count) |
| 1997 | { |
| 1998 | unsigned long tmp; |
| 1999 | int ret; |
| 2000 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 2001 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2002 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2003 | pr_err("Unable to extract alua_tg_pt_status\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 2004 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2005 | } |
| 2006 | if ((tmp != ALUA_STATUS_NONE) && |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 2007 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
| 2008 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2009 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2010 | tmp); |
| 2011 | return -EINVAL; |
| 2012 | } |
| 2013 | lun->lun_sep->sep_tg_pt_secondary_stat = (int)tmp; |
| 2014 | |
| 2015 | return count; |
| 2016 | } |
| 2017 | |
| 2018 | ssize_t core_alua_show_secondary_write_metadata( |
| 2019 | struct se_lun *lun, |
| 2020 | char *page) |
| 2021 | { |
| 2022 | return sprintf(page, "%d\n", |
| 2023 | lun->lun_sep->sep_tg_pt_secondary_write_md); |
| 2024 | } |
| 2025 | |
| 2026 | ssize_t core_alua_store_secondary_write_metadata( |
| 2027 | struct se_lun *lun, |
| 2028 | const char *page, |
| 2029 | size_t count) |
| 2030 | { |
| 2031 | unsigned long tmp; |
| 2032 | int ret; |
| 2033 | |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 2034 | ret = kstrtoul(page, 0, &tmp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2035 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2036 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 2037 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2038 | } |
| 2039 | if ((tmp != 0) && (tmp != 1)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2040 | pr_err("Illegal value for alua_tg_pt_write_md:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2041 | " %lu\n", tmp); |
| 2042 | return -EINVAL; |
| 2043 | } |
| 2044 | lun->lun_sep->sep_tg_pt_secondary_write_md = (int)tmp; |
| 2045 | |
| 2046 | return count; |
| 2047 | } |
| 2048 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2049 | int core_setup_alua(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2050 | { |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 2051 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && |
| 2052 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
| 2053 | struct t10_alua_lu_gp_member *lu_gp_mem; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2054 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2055 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2056 | * Associate this struct se_device with the default ALUA |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2057 | * LUN Group. |
| 2058 | */ |
| 2059 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2060 | if (IS_ERR(lu_gp_mem)) |
| 2061 | return PTR_ERR(lu_gp_mem); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2062 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2063 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 2064 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2065 | default_lu_gp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2066 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 2067 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2068 | pr_debug("%s: Adding to default ALUA LU Group:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2069 | " core/alua/lu_gps/default_lu_gp\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2070 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2071 | } |
| 2072 | |
| 2073 | return 0; |
| 2074 | } |