Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_transport.c |
| 3 | * |
| 4 | * This file contains the Generic Target Engine Core. |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2002-2013 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/net.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/string.h> |
| 29 | #include <linux/timer.h> |
| 30 | #include <linux/slab.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 32 | #include <linux/kthread.h> |
| 33 | #include <linux/in.h> |
| 34 | #include <linux/cdrom.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 35 | #include <linux/module.h> |
Roland Dreier | 015487b | 2012-02-13 16:18:17 -0800 | [diff] [blame] | 36 | #include <linux/ratelimit.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | #include <asm/unaligned.h> |
| 38 | #include <net/sock.h> |
| 39 | #include <net/tcp.h> |
| 40 | #include <scsi/scsi.h> |
| 41 | #include <scsi/scsi_cmnd.h> |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 42 | #include <scsi/scsi_tcq.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 43 | |
| 44 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 45 | #include <target/target_core_backend.h> |
| 46 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 47 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 48 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | #include "target_core_alua.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 50 | #include "target_core_pr.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 51 | #include "target_core_ua.h" |
| 52 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 53 | #define CREATE_TRACE_POINTS |
| 54 | #include <trace/events/target.h> |
| 55 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 56 | static struct workqueue_struct *target_completion_wq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 57 | static struct kmem_cache *se_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 58 | struct kmem_cache *se_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 59 | struct kmem_cache *t10_pr_reg_cache; |
| 60 | struct kmem_cache *t10_alua_lu_gp_cache; |
| 61 | struct kmem_cache *t10_alua_lu_gp_mem_cache; |
| 62 | struct kmem_cache *t10_alua_tg_pt_gp_cache; |
| 63 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 64 | struct kmem_cache *t10_alua_lba_map_cache; |
| 65 | struct kmem_cache *t10_alua_lba_map_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 66 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | static void transport_complete_task_attr(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 68 | static void transport_handle_queue_full(struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 69 | struct se_device *dev); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 70 | static int transport_put_cmd(struct se_cmd *cmd); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 71 | static void target_complete_ok_work(struct work_struct *work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 72 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 73 | int init_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 75 | se_sess_cache = kmem_cache_create("se_sess_cache", |
| 76 | sizeof(struct se_session), __alignof__(struct se_session), |
| 77 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 78 | if (!se_sess_cache) { |
| 79 | pr_err("kmem_cache_create() for struct se_session" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 80 | " failed\n"); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 81 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 82 | } |
| 83 | se_ua_cache = kmem_cache_create("se_ua_cache", |
| 84 | sizeof(struct se_ua), __alignof__(struct se_ua), |
| 85 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 86 | if (!se_ua_cache) { |
| 87 | pr_err("kmem_cache_create() for struct se_ua failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 88 | goto out_free_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 89 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 90 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
| 91 | sizeof(struct t10_pr_registration), |
| 92 | __alignof__(struct t10_pr_registration), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 93 | if (!t10_pr_reg_cache) { |
| 94 | pr_err("kmem_cache_create() for struct t10_pr_registration" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 95 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 96 | goto out_free_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | } |
| 98 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", |
| 99 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), |
| 100 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 101 | if (!t10_alua_lu_gp_cache) { |
| 102 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 103 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 104 | goto out_free_pr_reg_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 105 | } |
| 106 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", |
| 107 | sizeof(struct t10_alua_lu_gp_member), |
| 108 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 109 | if (!t10_alua_lu_gp_mem_cache) { |
| 110 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 111 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 112 | goto out_free_lu_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 113 | } |
| 114 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", |
| 115 | sizeof(struct t10_alua_tg_pt_gp), |
| 116 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 117 | if (!t10_alua_tg_pt_gp_cache) { |
| 118 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 119 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 120 | goto out_free_lu_gp_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | } |
| 122 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( |
| 123 | "t10_alua_tg_pt_gp_mem_cache", |
| 124 | sizeof(struct t10_alua_tg_pt_gp_member), |
| 125 | __alignof__(struct t10_alua_tg_pt_gp_member), |
| 126 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 127 | if (!t10_alua_tg_pt_gp_mem_cache) { |
| 128 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 129 | "mem_t failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 130 | goto out_free_tg_pt_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 131 | } |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 132 | t10_alua_lba_map_cache = kmem_cache_create( |
| 133 | "t10_alua_lba_map_cache", |
| 134 | sizeof(struct t10_alua_lba_map), |
| 135 | __alignof__(struct t10_alua_lba_map), 0, NULL); |
| 136 | if (!t10_alua_lba_map_cache) { |
| 137 | pr_err("kmem_cache_create() for t10_alua_lba_map_" |
| 138 | "cache failed\n"); |
| 139 | goto out_free_tg_pt_gp_mem_cache; |
| 140 | } |
| 141 | t10_alua_lba_map_mem_cache = kmem_cache_create( |
| 142 | "t10_alua_lba_map_mem_cache", |
| 143 | sizeof(struct t10_alua_lba_map_member), |
| 144 | __alignof__(struct t10_alua_lba_map_member), 0, NULL); |
| 145 | if (!t10_alua_lba_map_mem_cache) { |
| 146 | pr_err("kmem_cache_create() for t10_alua_lba_map_mem_" |
| 147 | "cache failed\n"); |
| 148 | goto out_free_lba_map_cache; |
| 149 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 150 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 151 | target_completion_wq = alloc_workqueue("target_completion", |
| 152 | WQ_MEM_RECLAIM, 0); |
| 153 | if (!target_completion_wq) |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 154 | goto out_free_lba_map_mem_cache; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 155 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 156 | return 0; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 157 | |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 158 | out_free_lba_map_mem_cache: |
| 159 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); |
| 160 | out_free_lba_map_cache: |
| 161 | kmem_cache_destroy(t10_alua_lba_map_cache); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 162 | out_free_tg_pt_gp_mem_cache: |
| 163 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
| 164 | out_free_tg_pt_gp_cache: |
| 165 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 166 | out_free_lu_gp_mem_cache: |
| 167 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 168 | out_free_lu_gp_cache: |
| 169 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 170 | out_free_pr_reg_cache: |
| 171 | kmem_cache_destroy(t10_pr_reg_cache); |
| 172 | out_free_ua_cache: |
| 173 | kmem_cache_destroy(se_ua_cache); |
| 174 | out_free_sess_cache: |
| 175 | kmem_cache_destroy(se_sess_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 176 | out: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 177 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 178 | } |
| 179 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 180 | void release_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 181 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 182 | destroy_workqueue(target_completion_wq); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 183 | kmem_cache_destroy(se_sess_cache); |
| 184 | kmem_cache_destroy(se_ua_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 185 | kmem_cache_destroy(t10_pr_reg_cache); |
| 186 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 187 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 188 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 189 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 190 | kmem_cache_destroy(t10_alua_lba_map_cache); |
| 191 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 192 | } |
| 193 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 194 | /* This code ensures unique mib indexes are handed out. */ |
| 195 | static DEFINE_SPINLOCK(scsi_mib_index_lock); |
| 196 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 197 | |
| 198 | /* |
| 199 | * Allocate a new row index for the entry type specified |
| 200 | */ |
| 201 | u32 scsi_get_new_index(scsi_index_t type) |
| 202 | { |
| 203 | u32 new_index; |
| 204 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 205 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 206 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 207 | spin_lock(&scsi_mib_index_lock); |
| 208 | new_index = ++scsi_mib_index[type]; |
| 209 | spin_unlock(&scsi_mib_index_lock); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 210 | |
| 211 | return new_index; |
| 212 | } |
| 213 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 214 | void transport_subsystem_check_init(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 215 | { |
| 216 | int ret; |
Andy Grover | 283669d | 2012-07-30 15:54:17 -0700 | [diff] [blame] | 217 | static int sub_api_initialized; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 218 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 219 | if (sub_api_initialized) |
| 220 | return; |
| 221 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | ret = request_module("target_core_iblock"); |
| 223 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 224 | pr_err("Unable to load target_core_iblock\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 225 | |
| 226 | ret = request_module("target_core_file"); |
| 227 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 228 | pr_err("Unable to load target_core_file\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | |
| 230 | ret = request_module("target_core_pscsi"); |
| 231 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 232 | pr_err("Unable to load target_core_pscsi\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 233 | |
Andy Grover | 7c9e7a6 | 2014-10-01 16:07:05 -0700 | [diff] [blame] | 234 | ret = request_module("target_core_user"); |
| 235 | if (ret != 0) |
| 236 | pr_err("Unable to load target_core_user\n"); |
| 237 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 238 | sub_api_initialized = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 239 | } |
| 240 | |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 241 | struct se_session *transport_init_session(enum target_prot_op sup_prot_ops) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 242 | { |
| 243 | struct se_session *se_sess; |
| 244 | |
| 245 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 246 | if (!se_sess) { |
| 247 | pr_err("Unable to allocate struct se_session from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 248 | " se_sess_cache\n"); |
| 249 | return ERR_PTR(-ENOMEM); |
| 250 | } |
| 251 | INIT_LIST_HEAD(&se_sess->sess_list); |
| 252 | INIT_LIST_HEAD(&se_sess->sess_acl_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 253 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 254 | INIT_LIST_HEAD(&se_sess->sess_wait_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 255 | spin_lock_init(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 256 | kref_init(&se_sess->sess_kref); |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 257 | se_sess->sup_prot_ops = sup_prot_ops; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 258 | |
| 259 | return se_sess; |
| 260 | } |
| 261 | EXPORT_SYMBOL(transport_init_session); |
| 262 | |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 263 | int transport_alloc_session_tags(struct se_session *se_sess, |
| 264 | unsigned int tag_num, unsigned int tag_size) |
| 265 | { |
| 266 | int rc; |
| 267 | |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 268 | se_sess->sess_cmd_map = kzalloc(tag_num * tag_size, |
| 269 | GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 270 | if (!se_sess->sess_cmd_map) { |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 271 | se_sess->sess_cmd_map = vzalloc(tag_num * tag_size); |
| 272 | if (!se_sess->sess_cmd_map) { |
| 273 | pr_err("Unable to allocate se_sess->sess_cmd_map\n"); |
| 274 | return -ENOMEM; |
| 275 | } |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); |
| 279 | if (rc < 0) { |
| 280 | pr_err("Unable to init se_sess->sess_tag_pool," |
| 281 | " tag_num: %u\n", tag_num); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 282 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 283 | vfree(se_sess->sess_cmd_map); |
| 284 | else |
| 285 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 286 | se_sess->sess_cmd_map = NULL; |
| 287 | return -ENOMEM; |
| 288 | } |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | EXPORT_SYMBOL(transport_alloc_session_tags); |
| 293 | |
| 294 | struct se_session *transport_init_session_tags(unsigned int tag_num, |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 295 | unsigned int tag_size, |
| 296 | enum target_prot_op sup_prot_ops) |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 297 | { |
| 298 | struct se_session *se_sess; |
| 299 | int rc; |
| 300 | |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 301 | se_sess = transport_init_session(sup_prot_ops); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 302 | if (IS_ERR(se_sess)) |
| 303 | return se_sess; |
| 304 | |
| 305 | rc = transport_alloc_session_tags(se_sess, tag_num, tag_size); |
| 306 | if (rc < 0) { |
| 307 | transport_free_session(se_sess); |
| 308 | return ERR_PTR(-ENOMEM); |
| 309 | } |
| 310 | |
| 311 | return se_sess; |
| 312 | } |
| 313 | EXPORT_SYMBOL(transport_init_session_tags); |
| 314 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 315 | /* |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 316 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 317 | */ |
| 318 | void __transport_register_session( |
| 319 | struct se_portal_group *se_tpg, |
| 320 | struct se_node_acl *se_nacl, |
| 321 | struct se_session *se_sess, |
| 322 | void *fabric_sess_ptr) |
| 323 | { |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 324 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 325 | unsigned char buf[PR_REG_ISID_LEN]; |
| 326 | |
| 327 | se_sess->se_tpg = se_tpg; |
| 328 | se_sess->fabric_sess_ptr = fabric_sess_ptr; |
| 329 | /* |
| 330 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t |
| 331 | * |
| 332 | * Only set for struct se_session's that will actually be moving I/O. |
| 333 | * eg: *NOT* discovery sessions. |
| 334 | */ |
| 335 | if (se_nacl) { |
| 336 | /* |
Nicholas Bellinger | bffb512 | 2015-04-14 11:52:22 -0700 | [diff] [blame] | 337 | * |
| 338 | * Determine if fabric allows for T10-PI feature bits exposed to |
| 339 | * initiators for device backends with !dev->dev_attrib.pi_prot_type. |
| 340 | * |
| 341 | * If so, then always save prot_type on a per se_node_acl node |
| 342 | * basis and re-instate the previous sess_prot_type to avoid |
| 343 | * disabling PI from below any previously initiator side |
| 344 | * registered LUNs. |
| 345 | */ |
| 346 | if (se_nacl->saved_prot_type) |
| 347 | se_sess->sess_prot_type = se_nacl->saved_prot_type; |
| 348 | else if (tfo->tpg_check_prot_fabric_only) |
| 349 | se_sess->sess_prot_type = se_nacl->saved_prot_type = |
| 350 | tfo->tpg_check_prot_fabric_only(se_tpg); |
| 351 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 352 | * If the fabric module supports an ISID based TransportID, |
| 353 | * save this value in binary from the fabric I_T Nexus now. |
| 354 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 355 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 356 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 357 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 358 | &buf[0], PR_REG_ISID_LEN); |
| 359 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); |
| 360 | } |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 361 | kref_get(&se_nacl->acl_kref); |
| 362 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 363 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 364 | /* |
| 365 | * The se_nacl->nacl_sess pointer will be set to the |
| 366 | * last active I_T Nexus for each struct se_node_acl. |
| 367 | */ |
| 368 | se_nacl->nacl_sess = se_sess; |
| 369 | |
| 370 | list_add_tail(&se_sess->sess_acl_list, |
| 371 | &se_nacl->acl_sess_list); |
| 372 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 373 | } |
| 374 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); |
| 375 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 376 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 377 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | } |
| 379 | EXPORT_SYMBOL(__transport_register_session); |
| 380 | |
| 381 | void transport_register_session( |
| 382 | struct se_portal_group *se_tpg, |
| 383 | struct se_node_acl *se_nacl, |
| 384 | struct se_session *se_sess, |
| 385 | void *fabric_sess_ptr) |
| 386 | { |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 387 | unsigned long flags; |
| 388 | |
| 389 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 390 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 391 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 392 | } |
| 393 | EXPORT_SYMBOL(transport_register_session); |
| 394 | |
Fengguang Wu | ecf0dd6 | 2012-10-10 07:30:20 +0800 | [diff] [blame] | 395 | static void target_release_session(struct kref *kref) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 396 | { |
| 397 | struct se_session *se_sess = container_of(kref, |
| 398 | struct se_session, sess_kref); |
| 399 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
| 400 | |
| 401 | se_tpg->se_tpg_tfo->close_session(se_sess); |
| 402 | } |
| 403 | |
| 404 | void target_get_session(struct se_session *se_sess) |
| 405 | { |
| 406 | kref_get(&se_sess->sess_kref); |
| 407 | } |
| 408 | EXPORT_SYMBOL(target_get_session); |
| 409 | |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 410 | void target_put_session(struct se_session *se_sess) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 411 | { |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 412 | kref_put(&se_sess->sess_kref, target_release_session); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 413 | } |
| 414 | EXPORT_SYMBOL(target_put_session); |
| 415 | |
Nicholas Bellinger | f8e471f | 2015-03-06 20:34:32 -0800 | [diff] [blame] | 416 | ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page) |
| 417 | { |
| 418 | struct se_session *se_sess; |
| 419 | ssize_t len = 0; |
| 420 | |
| 421 | spin_lock_bh(&se_tpg->session_lock); |
| 422 | list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) { |
| 423 | if (!se_sess->se_node_acl) |
| 424 | continue; |
| 425 | if (!se_sess->se_node_acl->dynamic_node_acl) |
| 426 | continue; |
| 427 | if (strlen(se_sess->se_node_acl->initiatorname) + 1 + len > PAGE_SIZE) |
| 428 | break; |
| 429 | |
| 430 | len += snprintf(page + len, PAGE_SIZE - len, "%s\n", |
| 431 | se_sess->se_node_acl->initiatorname); |
| 432 | len += 1; /* Include NULL terminator */ |
| 433 | } |
| 434 | spin_unlock_bh(&se_tpg->session_lock); |
| 435 | |
| 436 | return len; |
| 437 | } |
| 438 | EXPORT_SYMBOL(target_show_dynamic_sessions); |
| 439 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 440 | static void target_complete_nacl(struct kref *kref) |
| 441 | { |
| 442 | struct se_node_acl *nacl = container_of(kref, |
| 443 | struct se_node_acl, acl_kref); |
| 444 | |
| 445 | complete(&nacl->acl_free_comp); |
| 446 | } |
| 447 | |
| 448 | void target_put_nacl(struct se_node_acl *nacl) |
| 449 | { |
| 450 | kref_put(&nacl->acl_kref, target_complete_nacl); |
| 451 | } |
| 452 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 453 | void transport_deregister_session_configfs(struct se_session *se_sess) |
| 454 | { |
| 455 | struct se_node_acl *se_nacl; |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 456 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 457 | /* |
| 458 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session |
| 459 | */ |
| 460 | se_nacl = se_sess->se_node_acl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 461 | if (se_nacl) { |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 462 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 463 | if (se_nacl->acl_stop == 0) |
| 464 | list_del(&se_sess->sess_acl_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 465 | /* |
| 466 | * If the session list is empty, then clear the pointer. |
| 467 | * Otherwise, set the struct se_session pointer from the tail |
| 468 | * element of the per struct se_node_acl active session list. |
| 469 | */ |
| 470 | if (list_empty(&se_nacl->acl_sess_list)) |
| 471 | se_nacl->nacl_sess = NULL; |
| 472 | else { |
| 473 | se_nacl->nacl_sess = container_of( |
| 474 | se_nacl->acl_sess_list.prev, |
| 475 | struct se_session, sess_acl_list); |
| 476 | } |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 477 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 478 | } |
| 479 | } |
| 480 | EXPORT_SYMBOL(transport_deregister_session_configfs); |
| 481 | |
| 482 | void transport_free_session(struct se_session *se_sess) |
| 483 | { |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 484 | if (se_sess->sess_cmd_map) { |
| 485 | percpu_ida_destroy(&se_sess->sess_tag_pool); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 486 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 487 | vfree(se_sess->sess_cmd_map); |
| 488 | else |
| 489 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 490 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 491 | kmem_cache_free(se_sess_cache, se_sess); |
| 492 | } |
| 493 | EXPORT_SYMBOL(transport_free_session); |
| 494 | |
| 495 | void transport_deregister_session(struct se_session *se_sess) |
| 496 | { |
| 497 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 498 | const struct target_core_fabric_ops *se_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 499 | struct se_node_acl *se_nacl; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 500 | unsigned long flags; |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame^] | 501 | bool comp_nacl = true, drop_nacl = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 502 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 503 | if (!se_tpg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 504 | transport_free_session(se_sess); |
| 505 | return; |
| 506 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 507 | se_tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 508 | |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 509 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 510 | list_del(&se_sess->sess_list); |
| 511 | se_sess->se_tpg = NULL; |
| 512 | se_sess->fabric_sess_ptr = NULL; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 513 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 514 | |
| 515 | /* |
| 516 | * Determine if we need to do extra work for this initiator node's |
| 517 | * struct se_node_acl if it had been previously dynamically generated. |
| 518 | */ |
| 519 | se_nacl = se_sess->se_node_acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 520 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame^] | 521 | mutex_lock(&se_tpg->acl_node_mutex); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 522 | if (se_nacl && se_nacl->dynamic_node_acl) { |
| 523 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { |
| 524 | list_del(&se_nacl->acl_list); |
| 525 | se_tpg->num_node_acls--; |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame^] | 526 | drop_nacl = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 527 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 528 | } |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame^] | 529 | mutex_unlock(&se_tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 530 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame^] | 531 | if (drop_nacl) { |
| 532 | core_tpg_wait_for_nacl_pr_ref(se_nacl); |
| 533 | core_free_device_list_for_node(se_nacl, se_tpg); |
| 534 | kfree(se_nacl); |
| 535 | comp_nacl = false; |
| 536 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 537 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 538 | se_tpg->se_tpg_tfo->get_fabric_name()); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 539 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 540 | * If last kref is dropping now for an explicit NodeACL, awake sleeping |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 541 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
| 542 | * removal context. |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 543 | */ |
Christophe Vu-Brugier | 0bcc297 | 2014-06-06 17:15:16 +0200 | [diff] [blame] | 544 | if (se_nacl && comp_nacl) |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 545 | target_put_nacl(se_nacl); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 546 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 547 | transport_free_session(se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 548 | } |
| 549 | EXPORT_SYMBOL(transport_deregister_session); |
| 550 | |
| 551 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 552 | * Called with cmd->t_state_lock held. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 553 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 554 | static void target_remove_from_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 555 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 556 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 557 | unsigned long flags; |
| 558 | |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 559 | if (!dev) |
| 560 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 561 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 562 | if (cmd->transport_state & CMD_T_BUSY) |
| 563 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 564 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 565 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 566 | if (cmd->state_active) { |
| 567 | list_del(&cmd->state_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 568 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 569 | } |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 570 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 571 | } |
| 572 | |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 573 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
| 574 | bool write_pending) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 575 | { |
| 576 | unsigned long flags; |
| 577 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 578 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 579 | if (write_pending) |
| 580 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
| 581 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 582 | if (remove_from_lists) { |
| 583 | target_remove_from_state_list(cmd); |
| 584 | |
| 585 | /* |
| 586 | * Clear struct se_cmd->se_lun before the handoff to FE. |
| 587 | */ |
| 588 | cmd->se_lun = NULL; |
| 589 | } |
| 590 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 591 | /* |
| 592 | * Determine if frontend context caller is requesting the stopping of |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 593 | * this command for frontend exceptions. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 594 | */ |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 595 | if (cmd->transport_state & CMD_T_STOP) { |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 596 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08llx\n", |
| 597 | __func__, __LINE__, cmd->tag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 598 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 599 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 600 | |
Nicholas Bellinger | a95d651 | 2014-06-09 23:36:51 +0000 | [diff] [blame] | 601 | complete_all(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 602 | return 1; |
| 603 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 604 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 605 | cmd->transport_state &= ~CMD_T_ACTIVE; |
| 606 | if (remove_from_lists) { |
| 607 | /* |
| 608 | * Some fabric modules like tcm_loop can release |
| 609 | * their internally allocated I/O reference now and |
| 610 | * struct se_cmd now. |
| 611 | * |
| 612 | * Fabric modules are expected to return '1' here if the |
| 613 | * se_cmd being passed is released at this point, |
| 614 | * or zero if not being released. |
| 615 | */ |
| 616 | if (cmd->se_tfo->check_stop_free != NULL) { |
| 617 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 618 | return cmd->se_tfo->check_stop_free(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 619 | } |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 620 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 621 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 622 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) |
| 627 | { |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 628 | return transport_cmd_check_stop(cmd, true, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | static void transport_lun_remove_cmd(struct se_cmd *cmd) |
| 632 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 633 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 634 | |
Nicholas Bellinger | 5259a06 | 2014-01-28 17:56:30 -0800 | [diff] [blame] | 635 | if (!lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 636 | return; |
| 637 | |
Nicholas Bellinger | 5259a06 | 2014-01-28 17:56:30 -0800 | [diff] [blame] | 638 | if (cmpxchg(&cmd->lun_ref_active, true, false)) |
| 639 | percpu_ref_put(&lun->lun_ref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) |
| 643 | { |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 644 | if (cmd->se_cmd_flags & SCF_SE_LUN_CMD) |
| 645 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | 131e6ab | 2014-03-22 14:55:56 -0700 | [diff] [blame] | 646 | /* |
| 647 | * Allow the fabric driver to unmap any resources before |
| 648 | * releasing the descriptor via TFO->release_cmd() |
| 649 | */ |
| 650 | if (remove) |
| 651 | cmd->se_tfo->aborted_task(cmd); |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 652 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 653 | if (transport_cmd_check_stop_to_fabric(cmd)) |
| 654 | return; |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 655 | if (remove) |
Christoph Hellwig | e6a2573 | 2011-09-13 23:08:50 +0200 | [diff] [blame] | 656 | transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 657 | } |
| 658 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 659 | static void target_complete_failure_work(struct work_struct *work) |
| 660 | { |
| 661 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
| 662 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 663 | transport_generic_request_failure(cmd, |
| 664 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 665 | } |
| 666 | |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 667 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 668 | * Used when asking transport to copy Sense Data from the underlying |
| 669 | * Linux/SCSI struct scsi_cmnd |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 670 | */ |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 671 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 672 | { |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 673 | struct se_device *dev = cmd->se_dev; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 674 | |
| 675 | WARN_ON(!cmd->se_lun); |
| 676 | |
| 677 | if (!dev) |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 678 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 679 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 680 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
| 681 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 682 | |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 683 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 684 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 685 | pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n", |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 686 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 687 | return cmd->sense_buffer; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 688 | } |
| 689 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 690 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 691 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 692 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 693 | int success = scsi_status == GOOD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 694 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 695 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 696 | cmd->scsi_status = scsi_status; |
| 697 | |
| 698 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 699 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 700 | cmd->transport_state &= ~CMD_T_BUSY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 701 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 702 | if (dev && dev->transport->transport_complete) { |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 703 | dev->transport->transport_complete(cmd, |
| 704 | cmd->t_data_sg, |
| 705 | transport_get_sense_buffer(cmd)); |
| 706 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 707 | success = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 708 | } |
| 709 | |
| 710 | /* |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 711 | * See if we are waiting to complete for an exception condition. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 712 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 713 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 714 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 715 | complete(&cmd->task_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 716 | return; |
| 717 | } |
Christoph Hellwig | 2235007 | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 718 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 719 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 720 | * Check for case where an explicit ABORT_TASK has been received |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 721 | * and transport_wait_for_tasks() will be waiting for completion.. |
| 722 | */ |
| 723 | if (cmd->transport_state & CMD_T_ABORTED && |
| 724 | cmd->transport_state & CMD_T_STOP) { |
| 725 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a95d651 | 2014-06-09 23:36:51 +0000 | [diff] [blame] | 726 | complete_all(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 727 | return; |
Roland Dreier | 3dca147 | 2014-02-03 14:08:26 -0800 | [diff] [blame] | 728 | } else if (!success) { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 729 | INIT_WORK(&cmd->work, target_complete_failure_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 730 | } else { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 731 | INIT_WORK(&cmd->work, target_complete_ok_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 732 | } |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 733 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 734 | cmd->t_state = TRANSPORT_COMPLETE; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 735 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 736 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 737 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 738 | queue_work(target_completion_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 739 | } |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 740 | EXPORT_SYMBOL(target_complete_cmd); |
| 741 | |
Roland Dreier | 2426bd4 | 2014-06-10 11:07:47 -0700 | [diff] [blame] | 742 | void target_complete_cmd_with_length(struct se_cmd *cmd, u8 scsi_status, int length) |
| 743 | { |
| 744 | if (scsi_status == SAM_STAT_GOOD && length < cmd->data_length) { |
| 745 | if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { |
| 746 | cmd->residual_count += cmd->data_length - length; |
| 747 | } else { |
| 748 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 749 | cmd->residual_count = cmd->data_length - length; |
| 750 | } |
| 751 | |
| 752 | cmd->data_length = length; |
| 753 | } |
| 754 | |
| 755 | target_complete_cmd(cmd, scsi_status); |
| 756 | } |
| 757 | EXPORT_SYMBOL(target_complete_cmd_with_length); |
| 758 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 759 | static void target_add_to_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 760 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 761 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 762 | unsigned long flags; |
| 763 | |
Nicholas Bellinger | 4d2300c | 2011-11-30 18:18:33 -0800 | [diff] [blame] | 764 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 765 | if (!cmd->state_active) { |
| 766 | list_add_tail(&cmd->state_list, &dev->state_list); |
| 767 | cmd->state_active = true; |
| 768 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 769 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 770 | } |
| 771 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 772 | /* |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 773 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 774 | */ |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 775 | static void transport_write_pending_qf(struct se_cmd *cmd); |
| 776 | static void transport_complete_qf(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 777 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 778 | void target_qf_do_work(struct work_struct *work) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 779 | { |
| 780 | struct se_device *dev = container_of(work, struct se_device, |
| 781 | qf_work_queue); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 782 | LIST_HEAD(qf_cmd_list); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 783 | struct se_cmd *cmd, *cmd_tmp; |
| 784 | |
| 785 | spin_lock_irq(&dev->qf_cmd_lock); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 786 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
| 787 | spin_unlock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 788 | |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 789 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 790 | list_del(&cmd->se_qf_node); |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 791 | atomic_dec_mb(&dev->dev_qf_count); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 792 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 793 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 794 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 795 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 796 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
| 797 | : "UNKNOWN"); |
Christoph Hellwig | f7a5cc0 | 2011-10-17 13:56:42 -0400 | [diff] [blame] | 798 | |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 799 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
| 800 | transport_write_pending_qf(cmd); |
| 801 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) |
| 802 | transport_complete_qf(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 803 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 804 | } |
| 805 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 806 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
| 807 | { |
| 808 | switch (cmd->data_direction) { |
| 809 | case DMA_NONE: |
| 810 | return "NONE"; |
| 811 | case DMA_FROM_DEVICE: |
| 812 | return "READ"; |
| 813 | case DMA_TO_DEVICE: |
| 814 | return "WRITE"; |
| 815 | case DMA_BIDIRECTIONAL: |
| 816 | return "BIDI"; |
| 817 | default: |
| 818 | break; |
| 819 | } |
| 820 | |
| 821 | return "UNKNOWN"; |
| 822 | } |
| 823 | |
| 824 | void transport_dump_dev_state( |
| 825 | struct se_device *dev, |
| 826 | char *b, |
| 827 | int *bl) |
| 828 | { |
| 829 | *bl += sprintf(b + *bl, "Status: "); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 830 | if (dev->export_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 831 | *bl += sprintf(b + *bl, "ACTIVATED"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 832 | else |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 833 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 834 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 835 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
Nicholas Bellinger | 11e764b | 2012-05-09 12:42:09 -0700 | [diff] [blame] | 836 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 837 | dev->dev_attrib.block_size, |
| 838 | dev->dev_attrib.hw_max_sectors); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 839 | *bl += sprintf(b + *bl, " "); |
| 840 | } |
| 841 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 842 | void transport_dump_vpd_proto_id( |
| 843 | struct t10_vpd *vpd, |
| 844 | unsigned char *p_buf, |
| 845 | int p_buf_len) |
| 846 | { |
| 847 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 848 | int len; |
| 849 | |
| 850 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 851 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); |
| 852 | |
| 853 | switch (vpd->protocol_identifier) { |
| 854 | case 0x00: |
| 855 | sprintf(buf+len, "Fibre Channel\n"); |
| 856 | break; |
| 857 | case 0x10: |
| 858 | sprintf(buf+len, "Parallel SCSI\n"); |
| 859 | break; |
| 860 | case 0x20: |
| 861 | sprintf(buf+len, "SSA\n"); |
| 862 | break; |
| 863 | case 0x30: |
| 864 | sprintf(buf+len, "IEEE 1394\n"); |
| 865 | break; |
| 866 | case 0x40: |
| 867 | sprintf(buf+len, "SCSI Remote Direct Memory Access" |
| 868 | " Protocol\n"); |
| 869 | break; |
| 870 | case 0x50: |
| 871 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); |
| 872 | break; |
| 873 | case 0x60: |
| 874 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); |
| 875 | break; |
| 876 | case 0x70: |
| 877 | sprintf(buf+len, "Automation/Drive Interface Transport" |
| 878 | " Protocol\n"); |
| 879 | break; |
| 880 | case 0x80: |
| 881 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); |
| 882 | break; |
| 883 | default: |
| 884 | sprintf(buf+len, "Unknown 0x%02x\n", |
| 885 | vpd->protocol_identifier); |
| 886 | break; |
| 887 | } |
| 888 | |
| 889 | if (p_buf) |
| 890 | strncpy(p_buf, buf, p_buf_len); |
| 891 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 892 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | void |
| 896 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) |
| 897 | { |
| 898 | /* |
| 899 | * Check if the Protocol Identifier Valid (PIV) bit is set.. |
| 900 | * |
| 901 | * from spc3r23.pdf section 7.5.1 |
| 902 | */ |
| 903 | if (page_83[1] & 0x80) { |
| 904 | vpd->protocol_identifier = (page_83[0] & 0xf0); |
| 905 | vpd->protocol_identifier_set = 1; |
| 906 | transport_dump_vpd_proto_id(vpd, NULL, 0); |
| 907 | } |
| 908 | } |
| 909 | EXPORT_SYMBOL(transport_set_vpd_proto_id); |
| 910 | |
| 911 | int transport_dump_vpd_assoc( |
| 912 | struct t10_vpd *vpd, |
| 913 | unsigned char *p_buf, |
| 914 | int p_buf_len) |
| 915 | { |
| 916 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 917 | int ret = 0; |
| 918 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 919 | |
| 920 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 921 | len = sprintf(buf, "T10 VPD Identifier Association: "); |
| 922 | |
| 923 | switch (vpd->association) { |
| 924 | case 0x00: |
| 925 | sprintf(buf+len, "addressed logical unit\n"); |
| 926 | break; |
| 927 | case 0x10: |
| 928 | sprintf(buf+len, "target port\n"); |
| 929 | break; |
| 930 | case 0x20: |
| 931 | sprintf(buf+len, "SCSI target device\n"); |
| 932 | break; |
| 933 | default: |
| 934 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 935 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 936 | break; |
| 937 | } |
| 938 | |
| 939 | if (p_buf) |
| 940 | strncpy(p_buf, buf, p_buf_len); |
| 941 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 942 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 943 | |
| 944 | return ret; |
| 945 | } |
| 946 | |
| 947 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) |
| 948 | { |
| 949 | /* |
| 950 | * The VPD identification association.. |
| 951 | * |
| 952 | * from spc3r23.pdf Section 7.6.3.1 Table 297 |
| 953 | */ |
| 954 | vpd->association = (page_83[1] & 0x30); |
| 955 | return transport_dump_vpd_assoc(vpd, NULL, 0); |
| 956 | } |
| 957 | EXPORT_SYMBOL(transport_set_vpd_assoc); |
| 958 | |
| 959 | int transport_dump_vpd_ident_type( |
| 960 | struct t10_vpd *vpd, |
| 961 | unsigned char *p_buf, |
| 962 | int p_buf_len) |
| 963 | { |
| 964 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 965 | int ret = 0; |
| 966 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 967 | |
| 968 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 969 | len = sprintf(buf, "T10 VPD Identifier Type: "); |
| 970 | |
| 971 | switch (vpd->device_identifier_type) { |
| 972 | case 0x00: |
| 973 | sprintf(buf+len, "Vendor specific\n"); |
| 974 | break; |
| 975 | case 0x01: |
| 976 | sprintf(buf+len, "T10 Vendor ID based\n"); |
| 977 | break; |
| 978 | case 0x02: |
| 979 | sprintf(buf+len, "EUI-64 based\n"); |
| 980 | break; |
| 981 | case 0x03: |
| 982 | sprintf(buf+len, "NAA\n"); |
| 983 | break; |
| 984 | case 0x04: |
| 985 | sprintf(buf+len, "Relative target port identifier\n"); |
| 986 | break; |
| 987 | case 0x08: |
| 988 | sprintf(buf+len, "SCSI name string\n"); |
| 989 | break; |
| 990 | default: |
| 991 | sprintf(buf+len, "Unsupported: 0x%02x\n", |
| 992 | vpd->device_identifier_type); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 993 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 994 | break; |
| 995 | } |
| 996 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 997 | if (p_buf) { |
| 998 | if (p_buf_len < strlen(buf)+1) |
| 999 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1000 | strncpy(p_buf, buf, p_buf_len); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1001 | } else { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1002 | pr_debug("%s", buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1003 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1004 | |
| 1005 | return ret; |
| 1006 | } |
| 1007 | |
| 1008 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) |
| 1009 | { |
| 1010 | /* |
| 1011 | * The VPD identifier type.. |
| 1012 | * |
| 1013 | * from spc3r23.pdf Section 7.6.3.1 Table 298 |
| 1014 | */ |
| 1015 | vpd->device_identifier_type = (page_83[1] & 0x0f); |
| 1016 | return transport_dump_vpd_ident_type(vpd, NULL, 0); |
| 1017 | } |
| 1018 | EXPORT_SYMBOL(transport_set_vpd_ident_type); |
| 1019 | |
| 1020 | int transport_dump_vpd_ident( |
| 1021 | struct t10_vpd *vpd, |
| 1022 | unsigned char *p_buf, |
| 1023 | int p_buf_len) |
| 1024 | { |
| 1025 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 1026 | int ret = 0; |
| 1027 | |
| 1028 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 1029 | |
| 1030 | switch (vpd->device_identifier_code_set) { |
| 1031 | case 0x01: /* Binary */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 1032 | snprintf(buf, sizeof(buf), |
| 1033 | "T10 VPD Binary Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1034 | &vpd->device_identifier[0]); |
| 1035 | break; |
| 1036 | case 0x02: /* ASCII */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 1037 | snprintf(buf, sizeof(buf), |
| 1038 | "T10 VPD ASCII Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1039 | &vpd->device_identifier[0]); |
| 1040 | break; |
| 1041 | case 0x03: /* UTF-8 */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 1042 | snprintf(buf, sizeof(buf), |
| 1043 | "T10 VPD UTF-8 Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1044 | &vpd->device_identifier[0]); |
| 1045 | break; |
| 1046 | default: |
| 1047 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" |
| 1048 | " 0x%02x", vpd->device_identifier_code_set); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1049 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1050 | break; |
| 1051 | } |
| 1052 | |
| 1053 | if (p_buf) |
| 1054 | strncpy(p_buf, buf, p_buf_len); |
| 1055 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1056 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1057 | |
| 1058 | return ret; |
| 1059 | } |
| 1060 | |
| 1061 | int |
| 1062 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) |
| 1063 | { |
| 1064 | static const char hex_str[] = "0123456789abcdef"; |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 1065 | int j = 0, i = 4; /* offset to start of the identifier */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1066 | |
| 1067 | /* |
| 1068 | * The VPD Code Set (encoding) |
| 1069 | * |
| 1070 | * from spc3r23.pdf Section 7.6.3.1 Table 296 |
| 1071 | */ |
| 1072 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); |
| 1073 | switch (vpd->device_identifier_code_set) { |
| 1074 | case 0x01: /* Binary */ |
| 1075 | vpd->device_identifier[j++] = |
| 1076 | hex_str[vpd->device_identifier_type]; |
| 1077 | while (i < (4 + page_83[3])) { |
| 1078 | vpd->device_identifier[j++] = |
| 1079 | hex_str[(page_83[i] & 0xf0) >> 4]; |
| 1080 | vpd->device_identifier[j++] = |
| 1081 | hex_str[page_83[i] & 0x0f]; |
| 1082 | i++; |
| 1083 | } |
| 1084 | break; |
| 1085 | case 0x02: /* ASCII */ |
| 1086 | case 0x03: /* UTF-8 */ |
| 1087 | while (i < (4 + page_83[3])) |
| 1088 | vpd->device_identifier[j++] = page_83[i++]; |
| 1089 | break; |
| 1090 | default: |
| 1091 | break; |
| 1092 | } |
| 1093 | |
| 1094 | return transport_dump_vpd_ident(vpd, NULL, 0); |
| 1095 | } |
| 1096 | EXPORT_SYMBOL(transport_set_vpd_ident); |
| 1097 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1098 | sense_reason_t |
| 1099 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1100 | { |
| 1101 | struct se_device *dev = cmd->se_dev; |
| 1102 | |
| 1103 | if (cmd->unknown_data_length) { |
| 1104 | cmd->data_length = size; |
| 1105 | } else if (size != cmd->data_length) { |
| 1106 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
| 1107 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
| 1108 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
| 1109 | cmd->data_length, size, cmd->t_task_cdb[0]); |
| 1110 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1111 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 1112 | pr_err("Rejecting underflow/overflow" |
| 1113 | " WRITE data\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1114 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1115 | } |
| 1116 | /* |
| 1117 | * Reject READ_* or WRITE_* with overflow/underflow for |
| 1118 | * type SCF_SCSI_DATA_CDB. |
| 1119 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1120 | if (dev->dev_attrib.block_size != 512) { |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1121 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
| 1122 | " CDB on non 512-byte sector setup subsystem" |
| 1123 | " plugin: %s\n", dev->transport->name); |
| 1124 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1125 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1126 | } |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1127 | /* |
| 1128 | * For the overflow case keep the existing fabric provided |
| 1129 | * ->data_length. Otherwise for the underflow case, reset |
| 1130 | * ->data_length to the smaller SCSI expected data transfer |
| 1131 | * length. |
| 1132 | */ |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1133 | if (size > cmd->data_length) { |
| 1134 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; |
| 1135 | cmd->residual_count = (size - cmd->data_length); |
| 1136 | } else { |
| 1137 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 1138 | cmd->residual_count = (cmd->data_length - size); |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1139 | cmd->data_length = size; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1140 | } |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1141 | } |
| 1142 | |
| 1143 | return 0; |
| 1144 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1145 | } |
| 1146 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1147 | /* |
| 1148 | * Used by fabric modules containing a local struct se_cmd within their |
| 1149 | * fabric dependent per I/O descriptor. |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1150 | * |
| 1151 | * Preserves the value of @cmd->tag. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1152 | */ |
| 1153 | void transport_init_se_cmd( |
| 1154 | struct se_cmd *cmd, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1155 | const struct target_core_fabric_ops *tfo, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1156 | struct se_session *se_sess, |
| 1157 | u32 data_length, |
| 1158 | int data_direction, |
| 1159 | int task_attr, |
| 1160 | unsigned char *sense_buffer) |
| 1161 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1162 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1163 | INIT_LIST_HEAD(&cmd->se_qf_node); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1164 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1165 | INIT_LIST_HEAD(&cmd->state_list); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1166 | init_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1167 | init_completion(&cmd->cmd_wait_comp); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1168 | init_completion(&cmd->task_stop_comp); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1169 | spin_lock_init(&cmd->t_state_lock); |
Mikulas Patocka | 1e1110c | 2014-05-17 06:49:22 -0400 | [diff] [blame] | 1170 | kref_init(&cmd->cmd_kref); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1171 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1172 | |
| 1173 | cmd->se_tfo = tfo; |
| 1174 | cmd->se_sess = se_sess; |
| 1175 | cmd->data_length = data_length; |
| 1176 | cmd->data_direction = data_direction; |
| 1177 | cmd->sam_task_attr = task_attr; |
| 1178 | cmd->sense_buffer = sense_buffer; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1179 | |
| 1180 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1181 | } |
| 1182 | EXPORT_SYMBOL(transport_init_se_cmd); |
| 1183 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1184 | static sense_reason_t |
| 1185 | transport_check_alloc_task_attr(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1186 | { |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1187 | struct se_device *dev = cmd->se_dev; |
| 1188 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1189 | /* |
| 1190 | * Check if SAM Task Attribute emulation is enabled for this |
| 1191 | * struct se_device storage object |
| 1192 | */ |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1193 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1194 | return 0; |
| 1195 | |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1196 | if (cmd->sam_task_attr == TCM_ACA_TAG) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1197 | pr_debug("SAM Task Attribute ACA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1198 | " emulation is not supported\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1199 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1200 | } |
| 1201 | /* |
| 1202 | * Used to determine when ORDERED commands should go from |
| 1203 | * Dormant to Active status. |
| 1204 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1205 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1206 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1207 | cmd->se_ordered_id, cmd->sam_task_attr, |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1208 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1209 | return 0; |
| 1210 | } |
| 1211 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1212 | sense_reason_t |
| 1213 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1214 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1215 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1216 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1217 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1218 | /* |
| 1219 | * Ensure that the received CDB is less than the max (252 + 8) bytes |
| 1220 | * for VARIABLE_LENGTH_CMD |
| 1221 | */ |
| 1222 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1223 | pr_err("Received SCSI CDB with command_size: %d that" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1224 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
| 1225 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1226 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1227 | } |
| 1228 | /* |
| 1229 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, |
| 1230 | * allocate the additional extended CDB buffer now.. Otherwise |
| 1231 | * setup the pointer from __t_task_cdb to t_task_cdb. |
| 1232 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1233 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
| 1234 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1235 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1236 | if (!cmd->t_task_cdb) { |
| 1237 | pr_err("Unable to allocate cmd->t_task_cdb" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1238 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1239 | scsi_command_size(cdb), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1240 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1241 | return TCM_OUT_OF_RESOURCES; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1242 | } |
| 1243 | } else |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1244 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1245 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1246 | * Copy the original CDB into cmd-> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1247 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1248 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1249 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1250 | trace_target_sequencer_start(cmd); |
| 1251 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1252 | /* |
| 1253 | * Check for an existing UNIT ATTENTION condition |
| 1254 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1255 | ret = target_scsi3_ua_check(cmd); |
| 1256 | if (ret) |
| 1257 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1258 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1259 | ret = target_alua_state_check(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1260 | if (ret) |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1261 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1262 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1263 | ret = target_check_reservation(cmd); |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1264 | if (ret) { |
| 1265 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1266 | return ret; |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1267 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1268 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1269 | ret = dev->transport->parse_cdb(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1270 | if (ret) |
| 1271 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1272 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1273 | ret = transport_check_alloc_task_attr(cmd); |
| 1274 | if (ret) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1275 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1276 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1277 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1278 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1279 | spin_lock(&cmd->se_lun->lun_sep_lock); |
| 1280 | if (cmd->se_lun->lun_sep) |
| 1281 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; |
| 1282 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1283 | return 0; |
| 1284 | } |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1285 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1286 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1287 | /* |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1288 | * Used by fabric module frontends to queue tasks directly. |
| 1289 | * Many only be used from process context only |
| 1290 | */ |
| 1291 | int transport_handle_cdb_direct( |
| 1292 | struct se_cmd *cmd) |
| 1293 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1294 | sense_reason_t ret; |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1295 | |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1296 | if (!cmd->se_lun) { |
| 1297 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1298 | pr_err("cmd->se_lun is NULL\n"); |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1299 | return -EINVAL; |
| 1300 | } |
| 1301 | if (in_interrupt()) { |
| 1302 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1303 | pr_err("transport_generic_handle_cdb cannot be called" |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1304 | " from interrupt context\n"); |
| 1305 | return -EINVAL; |
| 1306 | } |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1307 | /* |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 1308 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
| 1309 | * outstanding descriptors are handled correctly during shutdown via |
| 1310 | * transport_wait_for_tasks() |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1311 | * |
| 1312 | * Also, we don't take cmd->t_state_lock here as we only expect |
| 1313 | * this to be called for initial descriptor submission. |
| 1314 | */ |
| 1315 | cmd->t_state = TRANSPORT_NEW_CMD; |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1316 | cmd->transport_state |= CMD_T_ACTIVE; |
| 1317 | |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1318 | /* |
| 1319 | * transport_generic_new_cmd() is already handling QUEUE_FULL, |
| 1320 | * so follow TRANSPORT_NEW_CMD processing thread context usage |
| 1321 | * and call transport_generic_request_failure() if necessary.. |
| 1322 | */ |
| 1323 | ret = transport_generic_new_cmd(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1324 | if (ret) |
| 1325 | transport_generic_request_failure(cmd, ret); |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1326 | return 0; |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1327 | } |
| 1328 | EXPORT_SYMBOL(transport_handle_cdb_direct); |
| 1329 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 1330 | sense_reason_t |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1331 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
| 1332 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
| 1333 | { |
| 1334 | if (!sgl || !sgl_count) |
| 1335 | return 0; |
| 1336 | |
| 1337 | /* |
| 1338 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming |
| 1339 | * scatterlists already have been set to follow what the fabric |
| 1340 | * passes for the original expected data transfer length. |
| 1341 | */ |
| 1342 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { |
| 1343 | pr_warn("Rejecting SCSI DATA overflow for fabric using" |
| 1344 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); |
| 1345 | return TCM_INVALID_CDB_FIELD; |
| 1346 | } |
| 1347 | |
| 1348 | cmd->t_data_sg = sgl; |
| 1349 | cmd->t_data_nents = sgl_count; |
Ilias Tsitsimpis | b32bd0a | 2015-04-23 21:30:07 +0300 | [diff] [blame] | 1350 | cmd->t_bidi_data_sg = sgl_bidi; |
| 1351 | cmd->t_bidi_data_nents = sgl_bidi_count; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1352 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1353 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 1354 | return 0; |
| 1355 | } |
| 1356 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1357 | /* |
| 1358 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized |
| 1359 | * se_cmd + use pre-allocated SGL memory. |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1360 | * |
| 1361 | * @se_cmd: command descriptor to submit |
| 1362 | * @se_sess: associated se_sess for endpoint |
| 1363 | * @cdb: pointer to SCSI CDB |
| 1364 | * @sense: pointer to SCSI sense buffer |
| 1365 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1366 | * @data_length: fabric expected data transfer length |
| 1367 | * @task_addr: SAM task attribute |
| 1368 | * @data_dir: DMA data direction |
| 1369 | * @flags: flags for command submission from target_sc_flags_tables |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1370 | * @sgl: struct scatterlist memory for unidirectional mapping |
| 1371 | * @sgl_count: scatterlist count for unidirectional mapping |
| 1372 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping |
| 1373 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1374 | * @sgl_prot: struct scatterlist memory protection information |
| 1375 | * @sgl_prot_count: scatterlist count for protection information |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1376 | * |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1377 | * Task tags are supported if the caller has set @se_cmd->tag. |
| 1378 | * |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1379 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1380 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1381 | * but still return zero here. |
| 1382 | * |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1383 | * This may only be called from process context, and also currently |
| 1384 | * assumes internal allocation of fabric payload buffer by target-core. |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1385 | */ |
| 1386 | int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess, |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1387 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1388 | u32 data_length, int task_attr, int data_dir, int flags, |
| 1389 | struct scatterlist *sgl, u32 sgl_count, |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1390 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count, |
| 1391 | struct scatterlist *sgl_prot, u32 sgl_prot_count) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1392 | { |
| 1393 | struct se_portal_group *se_tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1394 | sense_reason_t rc; |
| 1395 | int ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1396 | |
| 1397 | se_tpg = se_sess->se_tpg; |
| 1398 | BUG_ON(!se_tpg); |
| 1399 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); |
| 1400 | BUG_ON(in_interrupt()); |
| 1401 | /* |
| 1402 | * Initialize se_cmd for target operation. From this point |
| 1403 | * exceptions are handled by sending exception status via |
| 1404 | * target_core_fabric_ops->queue_status() callback |
| 1405 | */ |
| 1406 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1407 | data_length, data_dir, task_attr, sense); |
Sebastian Andrzej Siewior | b0d7994 | 2012-01-10 14:16:59 +0100 | [diff] [blame] | 1408 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
| 1409 | se_cmd->unknown_data_length = 1; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1410 | /* |
| 1411 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to |
| 1412 | * se_sess->sess_cmd_list. A second kref_get here is necessary |
| 1413 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second |
| 1414 | * kref_put() to happen during fabric packet acknowledgement. |
| 1415 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 1416 | ret = target_get_sess_cmd(se_cmd, flags & TARGET_SCF_ACK_KREF); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1417 | if (ret) |
| 1418 | return ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1419 | /* |
| 1420 | * Signal bidirectional data payloads to target-core |
| 1421 | */ |
| 1422 | if (flags & TARGET_SCF_BIDI_OP) |
| 1423 | se_cmd->se_cmd_flags |= SCF_BIDI; |
| 1424 | /* |
| 1425 | * Locate se_lun pointer and attach it to struct se_cmd |
| 1426 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1427 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
| 1428 | if (rc) { |
| 1429 | transport_send_check_condition_and_sense(se_cmd, rc, 0); |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 1430 | target_put_sess_cmd(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1431 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1432 | } |
Sagi Grimberg | b5b8e29 | 2014-02-19 17:50:17 +0200 | [diff] [blame] | 1433 | |
| 1434 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
| 1435 | if (rc != 0) { |
| 1436 | transport_generic_request_failure(se_cmd, rc); |
| 1437 | return 0; |
| 1438 | } |
| 1439 | |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1440 | /* |
| 1441 | * Save pointers for SGLs containing protection information, |
| 1442 | * if present. |
| 1443 | */ |
| 1444 | if (sgl_prot_count) { |
| 1445 | se_cmd->t_prot_sg = sgl_prot; |
| 1446 | se_cmd->t_prot_nents = sgl_prot_count; |
Akinobu Mita | 5835812 | 2015-05-01 15:23:49 +0900 | [diff] [blame] | 1447 | se_cmd->se_cmd_flags |= SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC; |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1448 | } |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1449 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1450 | /* |
| 1451 | * When a non zero sgl_count has been passed perform SGL passthrough |
| 1452 | * mapping for pre-allocated fabric memory instead of having target |
| 1453 | * core perform an internal SGL allocation.. |
| 1454 | */ |
| 1455 | if (sgl_count != 0) { |
| 1456 | BUG_ON(!sgl); |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1457 | |
Nicholas Bellinger | 944981c | 2012-10-02 14:00:33 -0700 | [diff] [blame] | 1458 | /* |
| 1459 | * A work-around for tcm_loop as some userspace code via |
| 1460 | * scsi-generic do not memset their associated read buffers, |
| 1461 | * so go ahead and do that here for type non-data CDBs. Also |
| 1462 | * note that this is currently guaranteed to be a single SGL |
| 1463 | * for this case by target core in target_setup_cmd_from_cdb() |
| 1464 | * -> transport_generic_cmd_sequencer(). |
| 1465 | */ |
| 1466 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && |
| 1467 | se_cmd->data_direction == DMA_FROM_DEVICE) { |
| 1468 | unsigned char *buf = NULL; |
| 1469 | |
| 1470 | if (sgl) |
| 1471 | buf = kmap(sg_page(sgl)) + sgl->offset; |
| 1472 | |
| 1473 | if (buf) { |
| 1474 | memset(buf, 0, sgl->length); |
| 1475 | kunmap(sg_page(sgl)); |
| 1476 | } |
| 1477 | } |
| 1478 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1479 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
| 1480 | sgl_bidi, sgl_bidi_count); |
| 1481 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1482 | transport_generic_request_failure(se_cmd, rc); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1483 | return 0; |
| 1484 | } |
| 1485 | } |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1486 | |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1487 | /* |
| 1488 | * Check if we need to delay processing because of ALUA |
| 1489 | * Active/NonOptimized primary access state.. |
| 1490 | */ |
| 1491 | core_alua_check_nonop_delay(se_cmd); |
| 1492 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1493 | transport_handle_cdb_direct(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1494 | return 0; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1495 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1496 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
| 1497 | |
| 1498 | /* |
| 1499 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd |
| 1500 | * |
| 1501 | * @se_cmd: command descriptor to submit |
| 1502 | * @se_sess: associated se_sess for endpoint |
| 1503 | * @cdb: pointer to SCSI CDB |
| 1504 | * @sense: pointer to SCSI sense buffer |
| 1505 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1506 | * @data_length: fabric expected data transfer length |
| 1507 | * @task_addr: SAM task attribute |
| 1508 | * @data_dir: DMA data direction |
| 1509 | * @flags: flags for command submission from target_sc_flags_tables |
| 1510 | * |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1511 | * Task tags are supported if the caller has set @se_cmd->tag. |
| 1512 | * |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1513 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1514 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1515 | * but still return zero here. |
| 1516 | * |
| 1517 | * This may only be called from process context, and also currently |
| 1518 | * assumes internal allocation of fabric payload buffer by target-core. |
| 1519 | * |
| 1520 | * It also assumes interal target core SGL memory allocation. |
| 1521 | */ |
| 1522 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
| 1523 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
| 1524 | u32 data_length, int task_attr, int data_dir, int flags) |
| 1525 | { |
| 1526 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, |
| 1527 | unpacked_lun, data_length, task_attr, data_dir, |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1528 | flags, NULL, 0, NULL, 0, NULL, 0); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1529 | } |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1530 | EXPORT_SYMBOL(target_submit_cmd); |
| 1531 | |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1532 | static void target_complete_tmr_failure(struct work_struct *work) |
| 1533 | { |
| 1534 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); |
| 1535 | |
| 1536 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; |
| 1537 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); |
Roland Dreier | 5a3b6fc | 2013-01-02 12:47:59 -0800 | [diff] [blame] | 1538 | |
| 1539 | transport_cmd_check_stop_to_fabric(se_cmd); |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1540 | } |
| 1541 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1542 | /** |
| 1543 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd |
| 1544 | * for TMR CDBs |
| 1545 | * |
| 1546 | * @se_cmd: command descriptor to submit |
| 1547 | * @se_sess: associated se_sess for endpoint |
| 1548 | * @sense: pointer to SCSI sense buffer |
| 1549 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1550 | * @fabric_context: fabric context for TMR req |
| 1551 | * @tm_type: Type of TM request |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1552 | * @gfp: gfp type for caller |
| 1553 | * @tag: referenced task tag for TMR_ABORT_TASK |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1554 | * @flags: submit cmd flags |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1555 | * |
| 1556 | * Callable from all contexts. |
| 1557 | **/ |
| 1558 | |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1559 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1560 | unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1561 | void *fabric_tmr_ptr, unsigned char tm_type, |
| 1562 | gfp_t gfp, unsigned int tag, int flags) |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1563 | { |
| 1564 | struct se_portal_group *se_tpg; |
| 1565 | int ret; |
| 1566 | |
| 1567 | se_tpg = se_sess->se_tpg; |
| 1568 | BUG_ON(!se_tpg); |
| 1569 | |
| 1570 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1571 | 0, DMA_NONE, TCM_SIMPLE_TAG, sense); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1572 | /* |
| 1573 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req |
| 1574 | * allocation failure. |
| 1575 | */ |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1576 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1577 | if (ret < 0) |
| 1578 | return -ENOMEM; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1579 | |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1580 | if (tm_type == TMR_ABORT_TASK) |
| 1581 | se_cmd->se_tmr_req->ref_task_tag = tag; |
| 1582 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1583 | /* See target_submit_cmd for commentary */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 1584 | ret = target_get_sess_cmd(se_cmd, flags & TARGET_SCF_ACK_KREF); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 1585 | if (ret) { |
| 1586 | core_tmr_release_req(se_cmd->se_tmr_req); |
| 1587 | return ret; |
| 1588 | } |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1589 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1590 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
| 1591 | if (ret) { |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1592 | /* |
| 1593 | * For callback during failure handling, push this work off |
| 1594 | * to process context with TMR_LUN_DOES_NOT_EXIST status. |
| 1595 | */ |
| 1596 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); |
| 1597 | schedule_work(&se_cmd->work); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1598 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1599 | } |
| 1600 | transport_generic_handle_tmr(se_cmd); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1601 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1602 | } |
| 1603 | EXPORT_SYMBOL(target_submit_tmr); |
| 1604 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1605 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1606 | * If the cmd is active, request it to be stopped and sleep until it |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1607 | * has completed. |
| 1608 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1609 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
Bart Van Assche | cb0df4d | 2015-04-10 14:49:02 +0200 | [diff] [blame] | 1610 | __releases(&cmd->t_state_lock) |
| 1611 | __acquires(&cmd->t_state_lock) |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1612 | { |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1613 | bool was_active = false; |
| 1614 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1615 | if (cmd->transport_state & CMD_T_BUSY) { |
| 1616 | cmd->transport_state |= CMD_T_REQUEST_STOP; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1617 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
| 1618 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1619 | pr_debug("cmd %p waiting to complete\n", cmd); |
| 1620 | wait_for_completion(&cmd->task_stop_comp); |
| 1621 | pr_debug("cmd %p stopped successfully\n", cmd); |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1622 | |
| 1623 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1624 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
| 1625 | cmd->transport_state &= ~CMD_T_BUSY; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1626 | was_active = true; |
| 1627 | } |
| 1628 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1629 | return was_active; |
| 1630 | } |
| 1631 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1632 | /* |
| 1633 | * Handle SAM-esque emulation for generic transport request failures. |
| 1634 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1635 | void transport_generic_request_failure(struct se_cmd *cmd, |
| 1636 | sense_reason_t sense_reason) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1637 | { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1638 | int ret = 0; |
| 1639 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1640 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08llx" |
| 1641 | " CDB: 0x%02x\n", cmd, cmd->tag, cmd->t_task_cdb[0]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1642 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1643 | cmd->se_tfo->get_cmd_state(cmd), |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1644 | cmd->t_state, sense_reason); |
Christoph Hellwig | d43d6ae | 2012-04-24 00:25:08 -0400 | [diff] [blame] | 1645 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1646 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 1647 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 1648 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1649 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1650 | /* |
| 1651 | * For SAM Task Attribute emulation for failed struct se_cmd |
| 1652 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1653 | transport_complete_task_attr(cmd); |
Nicholas Bellinger | cf6d1f0 | 2013-08-21 19:34:43 -0700 | [diff] [blame] | 1654 | /* |
| 1655 | * Handle special case for COMPARE_AND_WRITE failure, where the |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 1656 | * callback is expected to drop the per device ->caw_sem. |
Nicholas Bellinger | cf6d1f0 | 2013-08-21 19:34:43 -0700 | [diff] [blame] | 1657 | */ |
| 1658 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 1659 | cmd->transport_complete_callback) |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 1660 | cmd->transport_complete_callback(cmd, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1661 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1662 | switch (sense_reason) { |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1663 | case TCM_NON_EXISTENT_LUN: |
| 1664 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 1665 | case TCM_INVALID_CDB_FIELD: |
| 1666 | case TCM_INVALID_PARAMETER_LIST: |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 1667 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1668 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 1669 | case TCM_UNKNOWN_MODE_PAGE: |
| 1670 | case TCM_WRITE_PROTECTED: |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 1671 | case TCM_ADDRESS_OUT_OF_RANGE: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1672 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 1673 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 1674 | case TCM_CHECK_CONDITION_NOT_READY: |
Nicholas Bellinger | 94387aa | 2014-02-23 14:04:09 +0000 | [diff] [blame] | 1675 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
| 1676 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: |
| 1677 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1678 | break; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1679 | case TCM_OUT_OF_RESOURCES: |
| 1680 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1681 | break; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1682 | case TCM_RESERVATION_CONFLICT: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1683 | /* |
| 1684 | * No SENSE Data payload for this case, set SCSI Status |
| 1685 | * and queue the response to $FABRIC_MOD. |
| 1686 | * |
| 1687 | * Uses linux/include/scsi/scsi.h SAM status codes defs |
| 1688 | */ |
| 1689 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
| 1690 | /* |
| 1691 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will |
| 1692 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION |
| 1693 | * CONFLICT STATUS. |
| 1694 | * |
| 1695 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 |
| 1696 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1697 | if (cmd->se_sess && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1698 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1699 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1700 | cmd->orig_fe_lun, 0x2C, |
| 1701 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); |
| 1702 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1703 | trace_target_cmd_complete(cmd); |
| 1704 | ret = cmd->se_tfo-> queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1705 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1706 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1707 | goto check_stop; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1708 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1709 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1710 | cmd->t_task_cdb[0], sense_reason); |
| 1711 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1712 | break; |
| 1713 | } |
Christoph Hellwig | f314643 | 2012-07-08 15:58:48 -0400 | [diff] [blame] | 1714 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1715 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1716 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1717 | goto queue_full; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1718 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1719 | check_stop: |
| 1720 | transport_lun_remove_cmd(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1721 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1722 | ; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1723 | return; |
| 1724 | |
| 1725 | queue_full: |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1726 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1727 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1728 | } |
Nicholas Bellinger | 2fbff12 | 2012-02-10 16:18:11 -0800 | [diff] [blame] | 1729 | EXPORT_SYMBOL(transport_generic_request_failure); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1730 | |
Nicholas Bellinger | 76dde50 | 2013-08-21 16:04:10 -0700 | [diff] [blame] | 1731 | void __target_execute_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1732 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1733 | sense_reason_t ret; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1734 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1735 | if (cmd->execute_cmd) { |
| 1736 | ret = cmd->execute_cmd(cmd); |
| 1737 | if (ret) { |
| 1738 | spin_lock_irq(&cmd->t_state_lock); |
| 1739 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
| 1740 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1741 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1742 | transport_generic_request_failure(cmd, ret); |
| 1743 | } |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1744 | } |
| 1745 | } |
| 1746 | |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1747 | static int target_write_prot_action(struct se_cmd *cmd) |
| 1748 | { |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1749 | u32 sectors; |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1750 | /* |
| 1751 | * Perform WRITE_INSERT of PI using software emulation when backend |
| 1752 | * device has PI enabled, if the transport has not already generated |
| 1753 | * PI using hardware WRITE_INSERT offload. |
| 1754 | */ |
| 1755 | switch (cmd->prot_op) { |
| 1756 | case TARGET_PROT_DOUT_INSERT: |
| 1757 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_INSERT)) |
| 1758 | sbc_dif_generate(cmd); |
| 1759 | break; |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1760 | case TARGET_PROT_DOUT_STRIP: |
| 1761 | if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_STRIP) |
| 1762 | break; |
| 1763 | |
| 1764 | sectors = cmd->data_length >> ilog2(cmd->se_dev->dev_attrib.block_size); |
Sagi Grimberg | f75b6fa | 2015-04-19 20:27:19 +0300 | [diff] [blame] | 1765 | cmd->pi_err = sbc_dif_verify(cmd, cmd->t_task_lba, |
| 1766 | sectors, 0, cmd->t_prot_sg, 0); |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1767 | if (unlikely(cmd->pi_err)) { |
| 1768 | spin_lock_irq(&cmd->t_state_lock); |
Bart Van Assche | 6c2faea | 2015-05-13 09:19:02 +0200 | [diff] [blame] | 1769 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1770 | spin_unlock_irq(&cmd->t_state_lock); |
| 1771 | transport_generic_request_failure(cmd, cmd->pi_err); |
| 1772 | return -1; |
| 1773 | } |
| 1774 | break; |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1775 | default: |
| 1776 | break; |
| 1777 | } |
| 1778 | |
| 1779 | return 0; |
| 1780 | } |
| 1781 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1782 | static bool target_handle_task_attr(struct se_cmd *cmd) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1783 | { |
| 1784 | struct se_device *dev = cmd->se_dev; |
| 1785 | |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1786 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1787 | return false; |
| 1788 | |
| 1789 | /* |
| 1790 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
| 1791 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
| 1792 | */ |
| 1793 | switch (cmd->sam_task_attr) { |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1794 | case TCM_HEAD_TAG: |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1795 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
| 1796 | "se_ordered_id: %u\n", |
| 1797 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1798 | return false; |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1799 | case TCM_ORDERED_TAG: |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1800 | atomic_inc_mb(&dev->dev_ordered_sync); |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1801 | |
| 1802 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
| 1803 | " se_ordered_id: %u\n", |
| 1804 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1805 | |
| 1806 | /* |
| 1807 | * Execute an ORDERED command if no other older commands |
| 1808 | * exist that need to be completed first. |
| 1809 | */ |
| 1810 | if (!atomic_read(&dev->simple_cmds)) |
| 1811 | return false; |
| 1812 | break; |
| 1813 | default: |
| 1814 | /* |
| 1815 | * For SIMPLE and UNTAGGED Task Attribute commands |
| 1816 | */ |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1817 | atomic_inc_mb(&dev->simple_cmds); |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1818 | break; |
| 1819 | } |
| 1820 | |
| 1821 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
| 1822 | return false; |
| 1823 | |
| 1824 | spin_lock(&dev->delayed_cmd_lock); |
| 1825 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); |
| 1826 | spin_unlock(&dev->delayed_cmd_lock); |
| 1827 | |
| 1828 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
| 1829 | " delayed CMD list, se_ordered_id: %u\n", |
| 1830 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
| 1831 | cmd->se_ordered_id); |
| 1832 | return true; |
| 1833 | } |
| 1834 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1835 | void target_execute_cmd(struct se_cmd *cmd) |
| 1836 | { |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1837 | /* |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1838 | * If the received CDB has aleady been aborted stop processing it here. |
| 1839 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1840 | if (transport_check_aborted_status(cmd, 1)) |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1841 | return; |
| 1842 | |
| 1843 | /* |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1844 | * Determine if frontend context caller is requesting the stopping of |
| 1845 | * this command for frontend exceptions. |
| 1846 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1847 | spin_lock_irq(&cmd->t_state_lock); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1848 | if (cmd->transport_state & CMD_T_STOP) { |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1849 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08llx\n", |
| 1850 | __func__, __LINE__, cmd->tag); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1851 | |
| 1852 | spin_unlock_irq(&cmd->t_state_lock); |
Nicholas Bellinger | a95d651 | 2014-06-09 23:36:51 +0000 | [diff] [blame] | 1853 | complete_all(&cmd->t_transport_stop_comp); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1854 | return; |
| 1855 | } |
| 1856 | |
| 1857 | cmd->t_state = TRANSPORT_PROCESSING; |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1858 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1859 | spin_unlock_irq(&cmd->t_state_lock); |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1860 | |
| 1861 | if (target_write_prot_action(cmd)) |
| 1862 | return; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1863 | |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1864 | if (target_handle_task_attr(cmd)) { |
| 1865 | spin_lock_irq(&cmd->t_state_lock); |
Bart Van Assche | 6c2faea | 2015-05-13 09:19:02 +0200 | [diff] [blame] | 1866 | cmd->transport_state &= ~(CMD_T_BUSY | CMD_T_SENT); |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1867 | spin_unlock_irq(&cmd->t_state_lock); |
| 1868 | return; |
| 1869 | } |
| 1870 | |
| 1871 | __target_execute_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1872 | } |
Christoph Hellwig | 70baf0a | 2012-07-08 15:58:39 -0400 | [diff] [blame] | 1873 | EXPORT_SYMBOL(target_execute_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1874 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1875 | /* |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1876 | * Process all commands up to the last received ORDERED task attribute which |
| 1877 | * requires another blocking boundary |
| 1878 | */ |
| 1879 | static void target_restart_delayed_cmds(struct se_device *dev) |
| 1880 | { |
| 1881 | for (;;) { |
| 1882 | struct se_cmd *cmd; |
| 1883 | |
| 1884 | spin_lock(&dev->delayed_cmd_lock); |
| 1885 | if (list_empty(&dev->delayed_cmd_list)) { |
| 1886 | spin_unlock(&dev->delayed_cmd_lock); |
| 1887 | break; |
| 1888 | } |
| 1889 | |
| 1890 | cmd = list_entry(dev->delayed_cmd_list.next, |
| 1891 | struct se_cmd, se_delayed_node); |
| 1892 | list_del(&cmd->se_delayed_node); |
| 1893 | spin_unlock(&dev->delayed_cmd_lock); |
| 1894 | |
| 1895 | __target_execute_cmd(cmd); |
| 1896 | |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1897 | if (cmd->sam_task_attr == TCM_ORDERED_TAG) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1898 | break; |
| 1899 | } |
| 1900 | } |
| 1901 | |
| 1902 | /* |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1903 | * Called from I/O completion to determine which dormant/delayed |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1904 | * and ordered cmds need to have their tasks added to the execution queue. |
| 1905 | */ |
| 1906 | static void transport_complete_task_attr(struct se_cmd *cmd) |
| 1907 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1908 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1909 | |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1910 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1911 | return; |
| 1912 | |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1913 | if (cmd->sam_task_attr == TCM_SIMPLE_TAG) { |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1914 | atomic_dec_mb(&dev->simple_cmds); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1915 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1916 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1917 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
| 1918 | cmd->se_ordered_id); |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1919 | } else if (cmd->sam_task_attr == TCM_HEAD_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1920 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1921 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1922 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
| 1923 | cmd->se_ordered_id); |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1924 | } else if (cmd->sam_task_attr == TCM_ORDERED_TAG) { |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1925 | atomic_dec_mb(&dev->dev_ordered_sync); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1926 | |
| 1927 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1928 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1929 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
| 1930 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1931 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1932 | target_restart_delayed_cmds(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1933 | } |
| 1934 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1935 | static void transport_complete_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1936 | { |
| 1937 | int ret = 0; |
| 1938 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1939 | transport_complete_task_attr(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1940 | |
| 1941 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1942 | trace_target_cmd_complete(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1943 | ret = cmd->se_tfo->queue_status(cmd); |
Quinn Tran | 082f58a | 2014-09-25 06:22:28 -0400 | [diff] [blame] | 1944 | goto out; |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1945 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1946 | |
| 1947 | switch (cmd->data_direction) { |
| 1948 | case DMA_FROM_DEVICE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1949 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1950 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1951 | break; |
| 1952 | case DMA_TO_DEVICE: |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 1953 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1954 | ret = cmd->se_tfo->queue_data_in(cmd); |
Bart Van Assche | 63509c6 | 2015-05-13 09:17:54 +0200 | [diff] [blame] | 1955 | break; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1956 | } |
| 1957 | /* Fall through for DMA_TO_DEVICE */ |
| 1958 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1959 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1960 | ret = cmd->se_tfo->queue_status(cmd); |
| 1961 | break; |
| 1962 | default: |
| 1963 | break; |
| 1964 | } |
| 1965 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1966 | out: |
| 1967 | if (ret < 0) { |
| 1968 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 1969 | return; |
| 1970 | } |
| 1971 | transport_lun_remove_cmd(cmd); |
| 1972 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1973 | } |
| 1974 | |
| 1975 | static void transport_handle_queue_full( |
| 1976 | struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1977 | struct se_device *dev) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1978 | { |
| 1979 | spin_lock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1980 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1981 | atomic_inc_mb(&dev->dev_qf_count); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1982 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
| 1983 | |
| 1984 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1985 | } |
| 1986 | |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1987 | static bool target_read_prot_action(struct se_cmd *cmd) |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 1988 | { |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1989 | switch (cmd->prot_op) { |
| 1990 | case TARGET_PROT_DIN_STRIP: |
| 1991 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_STRIP)) { |
Sagi Grimberg | f75b6fa | 2015-04-19 20:27:19 +0300 | [diff] [blame] | 1992 | u32 sectors = cmd->data_length >> |
| 1993 | ilog2(cmd->se_dev->dev_attrib.block_size); |
| 1994 | |
| 1995 | cmd->pi_err = sbc_dif_verify(cmd, cmd->t_task_lba, |
| 1996 | sectors, 0, cmd->t_prot_sg, |
| 1997 | 0); |
| 1998 | if (cmd->pi_err) |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1999 | return true; |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 2000 | } |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 2001 | break; |
Nicholas Bellinger | 72c03850 | 2015-02-08 04:02:08 -0800 | [diff] [blame] | 2002 | case TARGET_PROT_DIN_INSERT: |
| 2003 | if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_INSERT) |
| 2004 | break; |
| 2005 | |
| 2006 | sbc_dif_generate(cmd); |
| 2007 | break; |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 2008 | default: |
| 2009 | break; |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 2010 | } |
| 2011 | |
| 2012 | return false; |
| 2013 | } |
| 2014 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 2015 | static void target_complete_ok_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2016 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 2017 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2018 | int ret; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 2019 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2020 | /* |
| 2021 | * Check if we need to move delayed/dormant tasks from cmds on the |
| 2022 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task |
| 2023 | * Attribute. |
| 2024 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 2025 | transport_complete_task_attr(cmd); |
| 2026 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2027 | /* |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2028 | * Check to schedule QUEUE_FULL work, or execute an existing |
| 2029 | * cmd->transport_qf_callback() |
| 2030 | */ |
| 2031 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) |
| 2032 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 2033 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2034 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 2035 | * Check if we need to send a sense buffer from |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2036 | * the struct se_cmd in question. |
| 2037 | */ |
| 2038 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2039 | WARN_ON(!cmd->scsi_status); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2040 | ret = transport_send_check_condition_and_sense( |
| 2041 | cmd, 0, 1); |
| 2042 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2043 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2044 | |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2045 | transport_lun_remove_cmd(cmd); |
| 2046 | transport_cmd_check_stop_to_fabric(cmd); |
| 2047 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2048 | } |
| 2049 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2050 | * Check for a callback, used by amongst other things |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2051 | * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2052 | */ |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2053 | if (cmd->transport_complete_callback) { |
| 2054 | sense_reason_t rc; |
| 2055 | |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2056 | rc = cmd->transport_complete_callback(cmd, true); |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 2057 | if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) { |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2058 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 2059 | !cmd->data_length) |
| 2060 | goto queue_rsp; |
| 2061 | |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2062 | return; |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 2063 | } else if (rc) { |
| 2064 | ret = transport_send_check_condition_and_sense(cmd, |
| 2065 | rc, 0); |
| 2066 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2067 | goto queue_full; |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2068 | |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 2069 | transport_lun_remove_cmd(cmd); |
| 2070 | transport_cmd_check_stop_to_fabric(cmd); |
| 2071 | return; |
| 2072 | } |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2073 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2074 | |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2075 | queue_rsp: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2076 | switch (cmd->data_direction) { |
| 2077 | case DMA_FROM_DEVICE: |
| 2078 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2079 | if (cmd->se_lun->lun_sep) { |
| 2080 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2081 | cmd->data_length; |
| 2082 | } |
| 2083 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 2084 | /* |
| 2085 | * Perform READ_STRIP of PI using software emulation when |
| 2086 | * backend had PI enabled, if the transport will not be |
| 2087 | * performing hardware READ_STRIP offload. |
| 2088 | */ |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 2089 | if (target_read_prot_action(cmd)) { |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 2090 | ret = transport_send_check_condition_and_sense(cmd, |
| 2091 | cmd->pi_err, 0); |
| 2092 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2093 | goto queue_full; |
| 2094 | |
| 2095 | transport_lun_remove_cmd(cmd); |
| 2096 | transport_cmd_check_stop_to_fabric(cmd); |
| 2097 | return; |
| 2098 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2099 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2100 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2101 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2102 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2103 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2104 | break; |
| 2105 | case DMA_TO_DEVICE: |
| 2106 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2107 | if (cmd->se_lun->lun_sep) { |
| 2108 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2109 | cmd->data_length; |
| 2110 | } |
| 2111 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 2112 | /* |
| 2113 | * Check if we need to send READ payload for BIDI-COMMAND |
| 2114 | */ |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 2115 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2116 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2117 | if (cmd->se_lun->lun_sep) { |
| 2118 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2119 | cmd->data_length; |
| 2120 | } |
| 2121 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2122 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2123 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2124 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2125 | break; |
| 2126 | } |
| 2127 | /* Fall through for DMA_TO_DEVICE */ |
| 2128 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2129 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2130 | ret = cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2131 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2132 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2133 | break; |
| 2134 | default: |
| 2135 | break; |
| 2136 | } |
| 2137 | |
| 2138 | transport_lun_remove_cmd(cmd); |
| 2139 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2140 | return; |
| 2141 | |
| 2142 | queue_full: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2143 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2144 | " data_direction: %d\n", cmd, cmd->data_direction); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2145 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 2146 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2147 | } |
| 2148 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2149 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2150 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2151 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2152 | int count; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2153 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2154 | for_each_sg(sgl, sg, nents, count) |
| 2155 | __free_page(sg_page(sg)); |
| 2156 | |
| 2157 | kfree(sgl); |
| 2158 | } |
| 2159 | |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2160 | static inline void transport_reset_sgl_orig(struct se_cmd *cmd) |
| 2161 | { |
| 2162 | /* |
| 2163 | * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE |
| 2164 | * emulation, and free + reset pointers if necessary.. |
| 2165 | */ |
| 2166 | if (!cmd->t_data_sg_orig) |
| 2167 | return; |
| 2168 | |
| 2169 | kfree(cmd->t_data_sg); |
| 2170 | cmd->t_data_sg = cmd->t_data_sg_orig; |
| 2171 | cmd->t_data_sg_orig = NULL; |
| 2172 | cmd->t_data_nents = cmd->t_data_nents_orig; |
| 2173 | cmd->t_data_nents_orig = 0; |
| 2174 | } |
| 2175 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2176 | static inline void transport_free_pages(struct se_cmd *cmd) |
| 2177 | { |
Akinobu Mita | 5835812 | 2015-05-01 15:23:49 +0900 | [diff] [blame] | 2178 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC)) { |
| 2179 | transport_free_sgl(cmd->t_prot_sg, cmd->t_prot_nents); |
| 2180 | cmd->t_prot_sg = NULL; |
| 2181 | cmd->t_prot_nents = 0; |
| 2182 | } |
| 2183 | |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2184 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2185 | /* |
| 2186 | * Release special case READ buffer payload required for |
| 2187 | * SG_TO_MEM_NOALLOC to function with COMPARE_AND_WRITE |
| 2188 | */ |
| 2189 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) { |
| 2190 | transport_free_sgl(cmd->t_bidi_data_sg, |
| 2191 | cmd->t_bidi_data_nents); |
| 2192 | cmd->t_bidi_data_sg = NULL; |
| 2193 | cmd->t_bidi_data_nents = 0; |
| 2194 | } |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2195 | transport_reset_sgl_orig(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2196 | return; |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2197 | } |
| 2198 | transport_reset_sgl_orig(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2199 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2200 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2201 | cmd->t_data_sg = NULL; |
| 2202 | cmd->t_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2203 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2204 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2205 | cmd->t_bidi_data_sg = NULL; |
| 2206 | cmd->t_bidi_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2207 | } |
| 2208 | |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2209 | /** |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2210 | * transport_release_cmd - free a command |
| 2211 | * @cmd: command to free |
| 2212 | * |
| 2213 | * This routine unconditionally frees a command, and reference counting |
| 2214 | * or list removal must be done in the caller. |
| 2215 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2216 | static int transport_release_cmd(struct se_cmd *cmd) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2217 | { |
| 2218 | BUG_ON(!cmd->se_tfo); |
| 2219 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2220 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2221 | core_tmr_release_req(cmd->se_tmr_req); |
| 2222 | if (cmd->t_task_cdb != cmd->__t_task_cdb) |
| 2223 | kfree(cmd->t_task_cdb); |
| 2224 | /* |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2225 | * If this cmd has been setup with target_get_sess_cmd(), drop |
| 2226 | * the kref and call ->release_cmd() in kref callback. |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2227 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2228 | return target_put_sess_cmd(cmd); |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2229 | } |
| 2230 | |
| 2231 | /** |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2232 | * transport_put_cmd - release a reference to a command |
| 2233 | * @cmd: command to release |
| 2234 | * |
| 2235 | * This routine releases our reference to the command and frees it if possible. |
| 2236 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2237 | static int transport_put_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2238 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2239 | transport_free_pages(cmd); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2240 | return transport_release_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2241 | } |
| 2242 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2243 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2244 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2245 | struct scatterlist *sg = cmd->t_data_sg; |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2246 | struct page **pages; |
| 2247 | int i; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2248 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2249 | /* |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2250 | * We need to take into account a possible offset here for fabrics like |
| 2251 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for |
| 2252 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2253 | */ |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2254 | if (!cmd->t_data_nents) |
| 2255 | return NULL; |
Paolo Bonzini | 3717ef0 | 2012-09-07 17:30:35 +0200 | [diff] [blame] | 2256 | |
| 2257 | BUG_ON(!sg); |
| 2258 | if (cmd->t_data_nents == 1) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2259 | return kmap(sg_page(sg)) + sg->offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2260 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2261 | /* >1 page. use vmap */ |
| 2262 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2263 | if (!pages) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2264 | return NULL; |
| 2265 | |
| 2266 | /* convert sg[] to pages[] */ |
| 2267 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { |
| 2268 | pages[i] = sg_page(sg); |
| 2269 | } |
| 2270 | |
| 2271 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); |
| 2272 | kfree(pages); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2273 | if (!cmd->t_data_vmap) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2274 | return NULL; |
| 2275 | |
| 2276 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2277 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2278 | EXPORT_SYMBOL(transport_kmap_data_sg); |
| 2279 | |
| 2280 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
| 2281 | { |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2282 | if (!cmd->t_data_nents) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2283 | return; |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2284 | } else if (cmd->t_data_nents == 1) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2285 | kunmap(sg_page(cmd->t_data_sg)); |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2286 | return; |
| 2287 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2288 | |
| 2289 | vunmap(cmd->t_data_vmap); |
| 2290 | cmd->t_data_vmap = NULL; |
| 2291 | } |
| 2292 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2293 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 2294 | int |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2295 | target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, |
| 2296 | bool zero_page) |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2297 | { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2298 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2299 | struct page *page; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2300 | gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; |
| 2301 | unsigned int nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2302 | int i = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2303 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2304 | nent = DIV_ROUND_UP(length, PAGE_SIZE); |
| 2305 | sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL); |
| 2306 | if (!sg) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2307 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2308 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2309 | sg_init_table(sg, nent); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2310 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2311 | while (length) { |
| 2312 | u32 page_len = min_t(u32, length, PAGE_SIZE); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2313 | page = alloc_page(GFP_KERNEL | zero_flag); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2314 | if (!page) |
| 2315 | goto out; |
| 2316 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2317 | sg_set_page(&sg[i], page, page_len, 0); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2318 | length -= page_len; |
| 2319 | i++; |
| 2320 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2321 | *sgl = sg; |
| 2322 | *nents = nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2323 | return 0; |
| 2324 | |
| 2325 | out: |
Yi Zou | d0e27c8 | 2012-08-14 16:06:43 -0700 | [diff] [blame] | 2326 | while (i > 0) { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2327 | i--; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2328 | __free_page(sg_page(&sg[i])); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2329 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2330 | kfree(sg); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2331 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2332 | } |
| 2333 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2334 | /* |
Andy Grover | b16a35b | 2012-04-03 15:51:21 -0700 | [diff] [blame] | 2335 | * Allocate any required resources to execute the command. For writes we |
| 2336 | * might not have the payload yet, so notify the fabric via a call to |
| 2337 | * ->write_pending instead. Otherwise place it on the execution queue. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2338 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2339 | sense_reason_t |
| 2340 | transport_generic_new_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2341 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2342 | int ret = 0; |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2343 | bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2344 | |
Akinobu Mita | 5835812 | 2015-05-01 15:23:49 +0900 | [diff] [blame] | 2345 | if (cmd->prot_op != TARGET_PROT_NORMAL && |
| 2346 | !(cmd->se_cmd_flags & SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC)) { |
| 2347 | ret = target_alloc_sgl(&cmd->t_prot_sg, &cmd->t_prot_nents, |
| 2348 | cmd->prot_length, true); |
| 2349 | if (ret < 0) |
| 2350 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 2351 | } |
| 2352 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2353 | /* |
| 2354 | * Determine is the TCM fabric module has already allocated physical |
| 2355 | * memory, and is directly calling transport_generic_map_mem_to_cmd() |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2356 | * beforehand. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2357 | */ |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2358 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
| 2359 | cmd->data_length) { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2360 | |
Nicholas Bellinger | 8cefe07 | 2013-08-25 16:10:57 -0700 | [diff] [blame] | 2361 | if ((cmd->se_cmd_flags & SCF_BIDI) || |
| 2362 | (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) { |
| 2363 | u32 bidi_length; |
| 2364 | |
| 2365 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) |
| 2366 | bidi_length = cmd->t_task_nolb * |
| 2367 | cmd->se_dev->dev_attrib.block_size; |
| 2368 | else |
| 2369 | bidi_length = cmd->data_length; |
| 2370 | |
| 2371 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, |
| 2372 | &cmd->t_bidi_data_nents, |
| 2373 | bidi_length, zero_flag); |
| 2374 | if (ret < 0) |
| 2375 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 2376 | } |
| 2377 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2378 | ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
| 2379 | cmd->data_length, zero_flag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2380 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2381 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2382 | } else if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 2383 | cmd->data_length) { |
| 2384 | /* |
| 2385 | * Special case for COMPARE_AND_WRITE with fabrics |
| 2386 | * using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC. |
| 2387 | */ |
| 2388 | u32 caw_length = cmd->t_task_nolb * |
| 2389 | cmd->se_dev->dev_attrib.block_size; |
| 2390 | |
| 2391 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, |
| 2392 | &cmd->t_bidi_data_nents, |
| 2393 | caw_length, zero_flag); |
| 2394 | if (ret < 0) |
| 2395 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2396 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2397 | /* |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2398 | * If this command is not a write we can execute it right here, |
| 2399 | * for write buffers we need to notify the fabric driver first |
| 2400 | * and let it call back once the write buffers are ready. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2401 | */ |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 2402 | target_add_to_state_list(cmd); |
Roland Dreier | 885e7b0 | 2014-10-14 14:16:24 -0700 | [diff] [blame] | 2403 | if (cmd->data_direction != DMA_TO_DEVICE || cmd->data_length == 0) { |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2404 | target_execute_cmd(cmd); |
| 2405 | return 0; |
| 2406 | } |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 2407 | transport_cmd_check_stop(cmd, false, true); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2408 | |
| 2409 | ret = cmd->se_tfo->write_pending(cmd); |
| 2410 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2411 | goto queue_full; |
| 2412 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2413 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
| 2414 | WARN_ON(ret); |
Christoph Hellwig | da0f761 | 2011-10-18 06:57:01 -0400 | [diff] [blame] | 2415 | |
Nicholas Bellinger | b69c1fc | 2012-11-06 15:43:53 -0800 | [diff] [blame] | 2416 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2417 | |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2418 | queue_full: |
| 2419 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
| 2420 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
| 2421 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2422 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2423 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2424 | EXPORT_SYMBOL(transport_generic_new_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2425 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2426 | static void transport_write_pending_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2427 | { |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2428 | int ret; |
| 2429 | |
| 2430 | ret = cmd->se_tfo->write_pending(cmd); |
| 2431 | if (ret == -EAGAIN || ret == -ENOMEM) { |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2432 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
| 2433 | cmd); |
| 2434 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2435 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2436 | } |
| 2437 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2438 | int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2439 | { |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2440 | unsigned long flags; |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2441 | int ret = 0; |
| 2442 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2443 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2444 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2445 | transport_wait_for_tasks(cmd); |
| 2446 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2447 | ret = transport_release_cmd(cmd); |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2448 | } else { |
| 2449 | if (wait_for_tasks) |
| 2450 | transport_wait_for_tasks(cmd); |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2451 | /* |
| 2452 | * Handle WRITE failure case where transport_generic_new_cmd() |
| 2453 | * has already added se_cmd to state_list, but fabric has |
| 2454 | * failed command before I/O submission. |
| 2455 | */ |
| 2456 | if (cmd->state_active) { |
| 2457 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 2458 | target_remove_from_state_list(cmd); |
| 2459 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2460 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2461 | |
Christoph Hellwig | 82f1c8a | 2011-09-13 23:09:01 +0200 | [diff] [blame] | 2462 | if (cmd->se_lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2463 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2464 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2465 | ret = transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2466 | } |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2467 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2468 | } |
| 2469 | EXPORT_SYMBOL(transport_generic_free_cmd); |
| 2470 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2471 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2472 | * @se_cmd: command descriptor to add |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2473 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2474 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2475 | int target_get_sess_cmd(struct se_cmd *se_cmd, bool ack_kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2476 | { |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2477 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2478 | unsigned long flags; |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2479 | int ret = 0; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2480 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2481 | /* |
| 2482 | * Add a second kref if the fabric caller is expecting to handle |
| 2483 | * fabric acknowledgement that requires two target_put_sess_cmd() |
| 2484 | * invocations before se_cmd descriptor release. |
| 2485 | */ |
Bart Van Assche | 054922b | 2015-04-10 14:49:44 +0200 | [diff] [blame] | 2486 | if (ack_kref) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2487 | kref_get(&se_cmd->cmd_kref); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2488 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2489 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2490 | if (se_sess->sess_tearing_down) { |
| 2491 | ret = -ESHUTDOWN; |
| 2492 | goto out; |
| 2493 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2494 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2495 | out: |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2496 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
Bart Van Assche | 7544e597 | 2015-02-18 15:33:58 +0100 | [diff] [blame] | 2497 | |
| 2498 | if (ret && ack_kref) |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2499 | target_put_sess_cmd(se_cmd); |
Bart Van Assche | 7544e597 | 2015-02-18 15:33:58 +0100 | [diff] [blame] | 2500 | |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2501 | return ret; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2502 | } |
Nicholas Bellinger | 20361e6 | 2013-03-21 22:54:28 -0700 | [diff] [blame] | 2503 | EXPORT_SYMBOL(target_get_sess_cmd); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2504 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2505 | static void target_release_cmd_kref(struct kref *kref) |
Christoph Hellwig | 077aa3b | 2015-03-26 12:27:34 +0100 | [diff] [blame] | 2506 | __releases(&se_cmd->se_sess->sess_cmd_lock) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2507 | { |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2508 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
| 2509 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2510 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2511 | if (list_empty(&se_cmd->se_cmd_list)) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2512 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | ffc32d5 | 2012-02-13 02:35:01 -0800 | [diff] [blame] | 2513 | se_cmd->se_tfo->release_cmd(se_cmd); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2514 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2515 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2516 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2517 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2518 | complete(&se_cmd->cmd_wait_comp); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2519 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2520 | } |
| 2521 | list_del(&se_cmd->se_cmd_list); |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2522 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2523 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2524 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2525 | } |
| 2526 | |
| 2527 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2528 | * @se_cmd: command descriptor to drop |
| 2529 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2530 | int target_put_sess_cmd(struct se_cmd *se_cmd) |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2531 | { |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2532 | struct se_session *se_sess = se_cmd->se_sess; |
| 2533 | |
Nicholas Bellinger | 0ed6e18 | 2014-06-12 12:45:02 -0700 | [diff] [blame] | 2534 | if (!se_sess) { |
| 2535 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2536 | return 1; |
| 2537 | } |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2538 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
| 2539 | &se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2540 | } |
| 2541 | EXPORT_SYMBOL(target_put_sess_cmd); |
| 2542 | |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2543 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
| 2544 | * sess_cmd_list to complete cmd_wait_comp. Set |
| 2545 | * sess_tearing_down so no more commands are queued. |
| 2546 | * @se_sess: session to flag |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2547 | */ |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2548 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2549 | { |
| 2550 | struct se_cmd *se_cmd; |
| 2551 | unsigned long flags; |
| 2552 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2553 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2554 | if (se_sess->sess_tearing_down) { |
| 2555 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2556 | return; |
| 2557 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2558 | se_sess->sess_tearing_down = 1; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2559 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2560 | |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2561 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2562 | se_cmd->cmd_wait_set = 1; |
| 2563 | |
| 2564 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2565 | } |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2566 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2567 | |
| 2568 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors |
| 2569 | * @se_sess: session to wait for active I/O |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2570 | */ |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2571 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2572 | { |
| 2573 | struct se_cmd *se_cmd, *tmp_cmd; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2574 | unsigned long flags; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2575 | |
| 2576 | list_for_each_entry_safe(se_cmd, tmp_cmd, |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2577 | &se_sess->sess_wait_list, se_cmd_list) { |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2578 | list_del(&se_cmd->se_cmd_list); |
| 2579 | |
| 2580 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" |
| 2581 | " %d\n", se_cmd, se_cmd->t_state, |
| 2582 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2583 | |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2584 | wait_for_completion(&se_cmd->cmd_wait_comp); |
| 2585 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" |
| 2586 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2587 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2588 | |
| 2589 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2590 | } |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2591 | |
| 2592 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
| 2593 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); |
| 2594 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2595 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2596 | } |
| 2597 | EXPORT_SYMBOL(target_wait_for_sess_cmds); |
| 2598 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2599 | static int transport_clear_lun_ref_thread(void *p) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2600 | { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 2601 | struct se_lun *lun = p; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2602 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2603 | percpu_ref_kill(&lun->lun_ref); |
| 2604 | |
| 2605 | wait_for_completion(&lun->lun_ref_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2606 | complete(&lun->lun_shutdown_comp); |
| 2607 | |
| 2608 | return 0; |
| 2609 | } |
| 2610 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2611 | int transport_clear_lun_ref(struct se_lun *lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2612 | { |
| 2613 | struct task_struct *kt; |
| 2614 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2615 | kt = kthread_run(transport_clear_lun_ref_thread, lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2616 | "tcm_cl_%u", lun->unpacked_lun); |
| 2617 | if (IS_ERR(kt)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2618 | pr_err("Unable to start clear_lun thread\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2619 | return PTR_ERR(kt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2620 | } |
| 2621 | wait_for_completion(&lun->lun_shutdown_comp); |
| 2622 | |
| 2623 | return 0; |
| 2624 | } |
| 2625 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2626 | /** |
| 2627 | * transport_wait_for_tasks - wait for completion to occur |
| 2628 | * @cmd: command to wait |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2629 | * |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2630 | * Called from frontend fabric context to wait for storage engine |
| 2631 | * to pause and/or release frontend generated struct se_cmd. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2632 | */ |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2633 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2634 | { |
| 2635 | unsigned long flags; |
| 2636 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2637 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2638 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
| 2639 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2640 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2641 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2642 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 2643 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2644 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
| 2645 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2646 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2647 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2648 | } |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2649 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2650 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2651 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2652 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2653 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2654 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2655 | cmd->transport_state |= CMD_T_STOP; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2656 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2657 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08llx i_state: %d, t_state: %d, CMD_T_STOP\n", |
| 2658 | cmd, cmd->tag, cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2659 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2660 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2661 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2662 | wait_for_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2663 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2664 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2665 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2666 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2667 | pr_debug("wait_for_tasks: Stopped wait_for_completion(&cmd->t_transport_stop_comp) for ITT: 0x%08llx\n", |
| 2668 | cmd->tag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2669 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2670 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2671 | |
| 2672 | return true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2673 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2674 | EXPORT_SYMBOL(transport_wait_for_tasks); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2675 | |
| 2676 | static int transport_get_sense_codes( |
| 2677 | struct se_cmd *cmd, |
| 2678 | u8 *asc, |
| 2679 | u8 *ascq) |
| 2680 | { |
| 2681 | *asc = cmd->scsi_asc; |
| 2682 | *ascq = cmd->scsi_ascq; |
| 2683 | |
| 2684 | return 0; |
| 2685 | } |
| 2686 | |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2687 | static |
| 2688 | void transport_err_sector_info(unsigned char *buffer, sector_t bad_sector) |
| 2689 | { |
| 2690 | /* Place failed LBA in sense data information descriptor 0. */ |
| 2691 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 0xc; |
| 2692 | buffer[SPC_DESC_TYPE_OFFSET] = 0; /* Information */ |
| 2693 | buffer[SPC_ADDITIONAL_DESC_LEN_OFFSET] = 0xa; |
| 2694 | buffer[SPC_VALIDITY_OFFSET] = 0x80; |
| 2695 | |
| 2696 | /* Descriptor Information: failing sector */ |
| 2697 | put_unaligned_be64(bad_sector, &buffer[12]); |
| 2698 | } |
| 2699 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2700 | int |
| 2701 | transport_send_check_condition_and_sense(struct se_cmd *cmd, |
| 2702 | sense_reason_t reason, int from_transport) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2703 | { |
| 2704 | unsigned char *buffer = cmd->sense_buffer; |
| 2705 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2706 | u8 asc = 0, ascq = 0; |
| 2707 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2708 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2709 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2710 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2711 | return 0; |
| 2712 | } |
| 2713 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2714 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2715 | |
| 2716 | if (!reason && from_transport) |
| 2717 | goto after_reason; |
| 2718 | |
| 2719 | if (!from_transport) |
| 2720 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2721 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2722 | /* |
| 2723 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses |
| 2724 | * SENSE KEY values from include/scsi/scsi.h |
| 2725 | */ |
| 2726 | switch (reason) { |
Hannes Reinecke | ba82913 | 2012-12-17 09:53:33 +0100 | [diff] [blame] | 2727 | case TCM_NO_SENSE: |
| 2728 | /* CURRENT ERROR */ |
| 2729 | buffer[0] = 0x70; |
| 2730 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2731 | /* Not Ready */ |
| 2732 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
| 2733 | /* NO ADDITIONAL SENSE INFORMATION */ |
| 2734 | buffer[SPC_ASC_KEY_OFFSET] = 0; |
| 2735 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; |
| 2736 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2737 | case TCM_NON_EXISTENT_LUN: |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2738 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2739 | buffer[0] = 0x70; |
| 2740 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2741 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2742 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2743 | /* LOGICAL UNIT NOT SUPPORTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2744 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2745 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2746 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 2747 | case TCM_SECTOR_COUNT_TOO_MANY: |
| 2748 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2749 | buffer[0] = 0x70; |
| 2750 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2751 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2752 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2753 | /* INVALID COMMAND OPERATION CODE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2754 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2755 | break; |
| 2756 | case TCM_UNKNOWN_MODE_PAGE: |
| 2757 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2758 | buffer[0] = 0x70; |
| 2759 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2760 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2761 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2762 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2763 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2764 | break; |
| 2765 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 2766 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2767 | buffer[0] = 0x70; |
| 2768 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2769 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2770 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2771 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2772 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
| 2773 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2774 | break; |
| 2775 | case TCM_INCORRECT_AMOUNT_OF_DATA: |
| 2776 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2777 | buffer[0] = 0x70; |
| 2778 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2779 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2780 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2781 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2782 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2783 | /* NOT ENOUGH UNSOLICITED DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2784 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2785 | break; |
| 2786 | case TCM_INVALID_CDB_FIELD: |
| 2787 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2788 | buffer[0] = 0x70; |
| 2789 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2790 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2791 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2792 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2793 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2794 | break; |
| 2795 | case TCM_INVALID_PARAMETER_LIST: |
| 2796 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2797 | buffer[0] = 0x70; |
| 2798 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2799 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2800 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2801 | /* INVALID FIELD IN PARAMETER LIST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2802 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2803 | break; |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 2804 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
| 2805 | /* CURRENT ERROR */ |
| 2806 | buffer[0] = 0x70; |
| 2807 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2808 | /* ILLEGAL REQUEST */ |
| 2809 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2810 | /* PARAMETER LIST LENGTH ERROR */ |
| 2811 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; |
| 2812 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2813 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
| 2814 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2815 | buffer[0] = 0x70; |
| 2816 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2817 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2818 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2819 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2820 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2821 | /* UNEXPECTED_UNSOLICITED_DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2822 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2823 | break; |
| 2824 | case TCM_SERVICE_CRC_ERROR: |
| 2825 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2826 | buffer[0] = 0x70; |
| 2827 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2828 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2829 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2830 | /* PROTOCOL SERVICE CRC ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2831 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2832 | /* N/A */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2833 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2834 | break; |
| 2835 | case TCM_SNACK_REJECTED: |
| 2836 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2837 | buffer[0] = 0x70; |
| 2838 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2839 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2840 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2841 | /* READ ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2842 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2843 | /* FAILED RETRANSMISSION REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2844 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2845 | break; |
| 2846 | case TCM_WRITE_PROTECTED: |
| 2847 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2848 | buffer[0] = 0x70; |
| 2849 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2850 | /* DATA PROTECT */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2851 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2852 | /* WRITE PROTECTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2853 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2854 | break; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2855 | case TCM_ADDRESS_OUT_OF_RANGE: |
| 2856 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2857 | buffer[0] = 0x70; |
| 2858 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2859 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2860 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2861 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2862 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2863 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2864 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 2865 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2866 | buffer[0] = 0x70; |
| 2867 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2868 | /* UNIT ATTENTION */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2869 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2870 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2871 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2872 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2873 | break; |
| 2874 | case TCM_CHECK_CONDITION_NOT_READY: |
| 2875 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2876 | buffer[0] = 0x70; |
| 2877 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2878 | /* Not Ready */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2879 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2880 | transport_get_sense_codes(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2881 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2882 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2883 | break; |
Nicholas Bellinger | 818b571 | 2013-08-19 15:10:38 -0700 | [diff] [blame] | 2884 | case TCM_MISCOMPARE_VERIFY: |
| 2885 | /* CURRENT ERROR */ |
| 2886 | buffer[0] = 0x70; |
| 2887 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2888 | buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE; |
| 2889 | /* MISCOMPARE DURING VERIFY OPERATION */ |
| 2890 | buffer[SPC_ASC_KEY_OFFSET] = 0x1d; |
| 2891 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x00; |
| 2892 | break; |
Nicholas Bellinger | fcc4f17 | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2893 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
| 2894 | /* CURRENT ERROR */ |
| 2895 | buffer[0] = 0x70; |
| 2896 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2897 | /* ILLEGAL REQUEST */ |
| 2898 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2899 | /* LOGICAL BLOCK GUARD CHECK FAILED */ |
| 2900 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2901 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x01; |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2902 | transport_err_sector_info(buffer, cmd->bad_sector); |
Nicholas Bellinger | fcc4f17 | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2903 | break; |
| 2904 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: |
| 2905 | /* CURRENT ERROR */ |
| 2906 | buffer[0] = 0x70; |
| 2907 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2908 | /* ILLEGAL REQUEST */ |
| 2909 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2910 | /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */ |
| 2911 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2912 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x02; |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2913 | transport_err_sector_info(buffer, cmd->bad_sector); |
Nicholas Bellinger | fcc4f17 | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2914 | break; |
| 2915 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: |
| 2916 | /* CURRENT ERROR */ |
| 2917 | buffer[0] = 0x70; |
| 2918 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2919 | /* ILLEGAL REQUEST */ |
| 2920 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2921 | /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */ |
| 2922 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2923 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2924 | transport_err_sector_info(buffer, cmd->bad_sector); |
Nicholas Bellinger | fcc4f17 | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2925 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2926 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 2927 | default: |
| 2928 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2929 | buffer[0] = 0x70; |
| 2930 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Jörn Engel | ad67328 | 2013-03-18 18:30:31 -0400 | [diff] [blame] | 2931 | /* |
| 2932 | * Returning ILLEGAL REQUEST would cause immediate IO errors on |
| 2933 | * Solaris initiators. Returning NOT READY instead means the |
| 2934 | * operations will be retried a finite number of times and we |
| 2935 | * can survive intermittent errors. |
| 2936 | */ |
| 2937 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2938 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
Hannes Reinecke | 18a9df4 | 2012-12-17 09:53:32 +0100 | [diff] [blame] | 2939 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2940 | break; |
| 2941 | } |
| 2942 | /* |
| 2943 | * This code uses linux/include/scsi/scsi.h SAM status codes! |
| 2944 | */ |
| 2945 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; |
| 2946 | /* |
| 2947 | * Automatically padded, this value is encoded in the fabric's |
| 2948 | * data_length response PDU containing the SCSI defined sense data. |
| 2949 | */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2950 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2951 | |
| 2952 | after_reason: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2953 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2954 | return cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2955 | } |
| 2956 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); |
| 2957 | |
| 2958 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) |
| 2959 | { |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2960 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
| 2961 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2962 | |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2963 | /* |
| 2964 | * If cmd has been aborted but either no status is to be sent or it has |
| 2965 | * already been sent, just return |
| 2966 | */ |
| 2967 | if (!send_status || !(cmd->se_cmd_flags & SCF_SEND_DELAYED_TAS)) |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2968 | return 1; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2969 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2970 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08llx\n", |
| 2971 | cmd->t_task_cdb[0], cmd->tag); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2972 | |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2973 | cmd->se_cmd_flags &= ~SCF_SEND_DELAYED_TAS; |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2974 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2975 | trace_target_cmd_complete(cmd); |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2976 | cmd->se_tfo->queue_status(cmd); |
| 2977 | |
| 2978 | return 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2979 | } |
| 2980 | EXPORT_SYMBOL(transport_check_aborted_status); |
| 2981 | |
| 2982 | void transport_send_task_abort(struct se_cmd *cmd) |
| 2983 | { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2984 | unsigned long flags; |
| 2985 | |
| 2986 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2987 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION)) { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2988 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2989 | return; |
| 2990 | } |
| 2991 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2992 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2993 | /* |
| 2994 | * If there are still expected incoming fabric WRITEs, we wait |
| 2995 | * until until they have completed before sending a TASK_ABORTED |
| 2996 | * response. This response with TASK_ABORTED status will be |
| 2997 | * queued back to fabric module by transport_check_aborted_status(). |
| 2998 | */ |
| 2999 | if (cmd->data_direction == DMA_TO_DEVICE) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3000 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 3001 | cmd->transport_state |= CMD_T_ABORTED; |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 3002 | cmd->se_cmd_flags |= SCF_SEND_DELAYED_TAS; |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 3003 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3004 | } |
| 3005 | } |
| 3006 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3007 | |
Roland Dreier | 72b59d6e | 2013-01-02 12:47:58 -0800 | [diff] [blame] | 3008 | transport_lun_remove_cmd(cmd); |
| 3009 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 3010 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x, ITT: 0x%08llx\n", |
| 3011 | cmd->t_task_cdb[0], cmd->tag); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3012 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 3013 | trace_target_cmd_complete(cmd); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3014 | cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3015 | } |
| 3016 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3017 | static void target_tmr_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3018 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3019 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 3020 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3021 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
| 3022 | int ret; |
| 3023 | |
| 3024 | switch (tmr->function) { |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 3025 | case TMR_ABORT_TASK: |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 3026 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3027 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 3028 | case TMR_ABORT_TASK_SET: |
| 3029 | case TMR_CLEAR_ACA: |
| 3030 | case TMR_CLEAR_TASK_SET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3031 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
| 3032 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 3033 | case TMR_LUN_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3034 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
| 3035 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : |
| 3036 | TMR_FUNCTION_REJECTED; |
| 3037 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 3038 | case TMR_TARGET_WARM_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3039 | tmr->response = TMR_FUNCTION_REJECTED; |
| 3040 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 3041 | case TMR_TARGET_COLD_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3042 | tmr->response = TMR_FUNCTION_REJECTED; |
| 3043 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3044 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3045 | pr_err("Uknown TMR function: 0x%02x.\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3046 | tmr->function); |
| 3047 | tmr->response = TMR_FUNCTION_REJECTED; |
| 3048 | break; |
| 3049 | } |
| 3050 | |
| 3051 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3052 | cmd->se_tfo->queue_tm_rsp(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3053 | |
Christoph Hellwig | b7b8bef | 2011-10-17 13:56:44 -0400 | [diff] [blame] | 3054 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3055 | } |
| 3056 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3057 | int transport_generic_handle_tmr( |
| 3058 | struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3059 | { |
Nicholas Bellinger | f15e9cd | 2014-06-09 23:13:20 +0000 | [diff] [blame] | 3060 | unsigned long flags; |
| 3061 | |
| 3062 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 3063 | cmd->transport_state |= CMD_T_ACTIVE; |
| 3064 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 3065 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3066 | INIT_WORK(&cmd->work, target_tmr_work); |
| 3067 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3068 | return 0; |
| 3069 | } |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3070 | EXPORT_SYMBOL(transport_generic_handle_tmr); |
Christoph Hellwig | 814e5b4 | 2015-04-20 15:00:30 +0200 | [diff] [blame] | 3071 | |
| 3072 | bool |
| 3073 | target_check_wce(struct se_device *dev) |
| 3074 | { |
| 3075 | bool wce = false; |
| 3076 | |
| 3077 | if (dev->transport->get_write_cache) |
| 3078 | wce = dev->transport->get_write_cache(dev); |
| 3079 | else if (dev->dev_attrib.emulate_write_cache > 0) |
| 3080 | wce = true; |
| 3081 | |
| 3082 | return wce; |
| 3083 | } |
| 3084 | |
| 3085 | bool |
| 3086 | target_check_fua(struct se_device *dev) |
| 3087 | { |
| 3088 | return target_check_wce(dev) && dev->dev_attrib.emulate_fua_write > 0; |
| 3089 | } |