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; |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 63 | struct kmem_cache *t10_alua_lba_map_cache; |
| 64 | struct kmem_cache *t10_alua_lba_map_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 66 | static void transport_complete_task_attr(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 67 | static void transport_handle_queue_full(struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 68 | struct se_device *dev); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 69 | static int transport_put_cmd(struct se_cmd *cmd); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 70 | static void target_complete_ok_work(struct work_struct *work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 71 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 72 | int init_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 73 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | se_sess_cache = kmem_cache_create("se_sess_cache", |
| 75 | sizeof(struct se_session), __alignof__(struct se_session), |
| 76 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 77 | if (!se_sess_cache) { |
| 78 | pr_err("kmem_cache_create() for struct se_session" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 79 | " failed\n"); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 80 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 81 | } |
| 82 | se_ua_cache = kmem_cache_create("se_ua_cache", |
| 83 | sizeof(struct se_ua), __alignof__(struct se_ua), |
| 84 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 85 | if (!se_ua_cache) { |
| 86 | pr_err("kmem_cache_create() for struct se_ua failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 87 | goto out_free_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 88 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 89 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
| 90 | sizeof(struct t10_pr_registration), |
| 91 | __alignof__(struct t10_pr_registration), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 92 | if (!t10_pr_reg_cache) { |
| 93 | pr_err("kmem_cache_create() for struct t10_pr_registration" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 94 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 95 | goto out_free_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | } |
| 97 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", |
| 98 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), |
| 99 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 100 | if (!t10_alua_lu_gp_cache) { |
| 101 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 102 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 103 | goto out_free_pr_reg_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 104 | } |
| 105 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", |
| 106 | sizeof(struct t10_alua_lu_gp_member), |
| 107 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 108 | if (!t10_alua_lu_gp_mem_cache) { |
| 109 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 110 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 111 | goto out_free_lu_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 112 | } |
| 113 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", |
| 114 | sizeof(struct t10_alua_tg_pt_gp), |
| 115 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 116 | if (!t10_alua_tg_pt_gp_cache) { |
| 117 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 118 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 119 | goto out_free_lu_gp_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 120 | } |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 121 | t10_alua_lba_map_cache = kmem_cache_create( |
| 122 | "t10_alua_lba_map_cache", |
| 123 | sizeof(struct t10_alua_lba_map), |
| 124 | __alignof__(struct t10_alua_lba_map), 0, NULL); |
| 125 | if (!t10_alua_lba_map_cache) { |
| 126 | pr_err("kmem_cache_create() for t10_alua_lba_map_" |
| 127 | "cache failed\n"); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame^] | 128 | goto out_free_tg_pt_gp_cache; |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 129 | } |
| 130 | t10_alua_lba_map_mem_cache = kmem_cache_create( |
| 131 | "t10_alua_lba_map_mem_cache", |
| 132 | sizeof(struct t10_alua_lba_map_member), |
| 133 | __alignof__(struct t10_alua_lba_map_member), 0, NULL); |
| 134 | if (!t10_alua_lba_map_mem_cache) { |
| 135 | pr_err("kmem_cache_create() for t10_alua_lba_map_mem_" |
| 136 | "cache failed\n"); |
| 137 | goto out_free_lba_map_cache; |
| 138 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 139 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 140 | target_completion_wq = alloc_workqueue("target_completion", |
| 141 | WQ_MEM_RECLAIM, 0); |
| 142 | if (!target_completion_wq) |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 143 | goto out_free_lba_map_mem_cache; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 144 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 145 | return 0; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 146 | |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 147 | out_free_lba_map_mem_cache: |
| 148 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); |
| 149 | out_free_lba_map_cache: |
| 150 | kmem_cache_destroy(t10_alua_lba_map_cache); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 151 | out_free_tg_pt_gp_cache: |
| 152 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 153 | out_free_lu_gp_mem_cache: |
| 154 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 155 | out_free_lu_gp_cache: |
| 156 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 157 | out_free_pr_reg_cache: |
| 158 | kmem_cache_destroy(t10_pr_reg_cache); |
| 159 | out_free_ua_cache: |
| 160 | kmem_cache_destroy(se_ua_cache); |
| 161 | out_free_sess_cache: |
| 162 | kmem_cache_destroy(se_sess_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 163 | out: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 164 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 165 | } |
| 166 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 167 | void release_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 168 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 169 | destroy_workqueue(target_completion_wq); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 170 | kmem_cache_destroy(se_sess_cache); |
| 171 | kmem_cache_destroy(se_ua_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 172 | kmem_cache_destroy(t10_pr_reg_cache); |
| 173 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 174 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 175 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 176 | kmem_cache_destroy(t10_alua_lba_map_cache); |
| 177 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); |
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 | /* This code ensures unique mib indexes are handed out. */ |
| 181 | static DEFINE_SPINLOCK(scsi_mib_index_lock); |
| 182 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 183 | |
| 184 | /* |
| 185 | * Allocate a new row index for the entry type specified |
| 186 | */ |
| 187 | u32 scsi_get_new_index(scsi_index_t type) |
| 188 | { |
| 189 | u32 new_index; |
| 190 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 191 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 192 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 193 | spin_lock(&scsi_mib_index_lock); |
| 194 | new_index = ++scsi_mib_index[type]; |
| 195 | spin_unlock(&scsi_mib_index_lock); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 196 | |
| 197 | return new_index; |
| 198 | } |
| 199 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 200 | void transport_subsystem_check_init(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 201 | { |
| 202 | int ret; |
Andy Grover | 283669d | 2012-07-30 15:54:17 -0700 | [diff] [blame] | 203 | static int sub_api_initialized; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 204 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 205 | if (sub_api_initialized) |
| 206 | return; |
| 207 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 208 | ret = request_module("target_core_iblock"); |
| 209 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 210 | pr_err("Unable to load target_core_iblock\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 211 | |
| 212 | ret = request_module("target_core_file"); |
| 213 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 214 | pr_err("Unable to load target_core_file\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 215 | |
| 216 | ret = request_module("target_core_pscsi"); |
| 217 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 218 | pr_err("Unable to load target_core_pscsi\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 219 | |
Andy Grover | 7c9e7a6 | 2014-10-01 16:07:05 -0700 | [diff] [blame] | 220 | ret = request_module("target_core_user"); |
| 221 | if (ret != 0) |
| 222 | pr_err("Unable to load target_core_user\n"); |
| 223 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 224 | sub_api_initialized = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 225 | } |
| 226 | |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 227 | 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] | 228 | { |
| 229 | struct se_session *se_sess; |
| 230 | |
| 231 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 232 | if (!se_sess) { |
| 233 | pr_err("Unable to allocate struct se_session from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 234 | " se_sess_cache\n"); |
| 235 | return ERR_PTR(-ENOMEM); |
| 236 | } |
| 237 | INIT_LIST_HEAD(&se_sess->sess_list); |
| 238 | INIT_LIST_HEAD(&se_sess->sess_acl_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 239 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 240 | INIT_LIST_HEAD(&se_sess->sess_wait_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 241 | spin_lock_init(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 242 | kref_init(&se_sess->sess_kref); |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 243 | se_sess->sup_prot_ops = sup_prot_ops; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 244 | |
| 245 | return se_sess; |
| 246 | } |
| 247 | EXPORT_SYMBOL(transport_init_session); |
| 248 | |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 249 | int transport_alloc_session_tags(struct se_session *se_sess, |
| 250 | unsigned int tag_num, unsigned int tag_size) |
| 251 | { |
| 252 | int rc; |
| 253 | |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 254 | se_sess->sess_cmd_map = kzalloc(tag_num * tag_size, |
| 255 | GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 256 | if (!se_sess->sess_cmd_map) { |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 257 | se_sess->sess_cmd_map = vzalloc(tag_num * tag_size); |
| 258 | if (!se_sess->sess_cmd_map) { |
| 259 | pr_err("Unable to allocate se_sess->sess_cmd_map\n"); |
| 260 | return -ENOMEM; |
| 261 | } |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); |
| 265 | if (rc < 0) { |
| 266 | pr_err("Unable to init se_sess->sess_tag_pool," |
| 267 | " tag_num: %u\n", tag_num); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 268 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 269 | vfree(se_sess->sess_cmd_map); |
| 270 | else |
| 271 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 272 | se_sess->sess_cmd_map = NULL; |
| 273 | return -ENOMEM; |
| 274 | } |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | EXPORT_SYMBOL(transport_alloc_session_tags); |
| 279 | |
| 280 | struct se_session *transport_init_session_tags(unsigned int tag_num, |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 281 | unsigned int tag_size, |
| 282 | enum target_prot_op sup_prot_ops) |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 283 | { |
| 284 | struct se_session *se_sess; |
| 285 | int rc; |
| 286 | |
Nicholas Bellinger | e70beee | 2014-04-02 12:52:38 -0700 | [diff] [blame] | 287 | se_sess = transport_init_session(sup_prot_ops); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 288 | if (IS_ERR(se_sess)) |
| 289 | return se_sess; |
| 290 | |
| 291 | rc = transport_alloc_session_tags(se_sess, tag_num, tag_size); |
| 292 | if (rc < 0) { |
| 293 | transport_free_session(se_sess); |
| 294 | return ERR_PTR(-ENOMEM); |
| 295 | } |
| 296 | |
| 297 | return se_sess; |
| 298 | } |
| 299 | EXPORT_SYMBOL(transport_init_session_tags); |
| 300 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 301 | /* |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 302 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 303 | */ |
| 304 | void __transport_register_session( |
| 305 | struct se_portal_group *se_tpg, |
| 306 | struct se_node_acl *se_nacl, |
| 307 | struct se_session *se_sess, |
| 308 | void *fabric_sess_ptr) |
| 309 | { |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 310 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | unsigned char buf[PR_REG_ISID_LEN]; |
| 312 | |
| 313 | se_sess->se_tpg = se_tpg; |
| 314 | se_sess->fabric_sess_ptr = fabric_sess_ptr; |
| 315 | /* |
| 316 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t |
| 317 | * |
| 318 | * Only set for struct se_session's that will actually be moving I/O. |
| 319 | * eg: *NOT* discovery sessions. |
| 320 | */ |
| 321 | if (se_nacl) { |
| 322 | /* |
Nicholas Bellinger | bffb512 | 2015-04-14 11:52:22 -0700 | [diff] [blame] | 323 | * |
| 324 | * Determine if fabric allows for T10-PI feature bits exposed to |
| 325 | * initiators for device backends with !dev->dev_attrib.pi_prot_type. |
| 326 | * |
| 327 | * If so, then always save prot_type on a per se_node_acl node |
| 328 | * basis and re-instate the previous sess_prot_type to avoid |
| 329 | * disabling PI from below any previously initiator side |
| 330 | * registered LUNs. |
| 331 | */ |
| 332 | if (se_nacl->saved_prot_type) |
| 333 | se_sess->sess_prot_type = se_nacl->saved_prot_type; |
| 334 | else if (tfo->tpg_check_prot_fabric_only) |
| 335 | se_sess->sess_prot_type = se_nacl->saved_prot_type = |
| 336 | tfo->tpg_check_prot_fabric_only(se_tpg); |
| 337 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 338 | * If the fabric module supports an ISID based TransportID, |
| 339 | * save this value in binary from the fabric I_T Nexus now. |
| 340 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 341 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 342 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 343 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 344 | &buf[0], PR_REG_ISID_LEN); |
| 345 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); |
| 346 | } |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 347 | kref_get(&se_nacl->acl_kref); |
| 348 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 349 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 350 | /* |
| 351 | * The se_nacl->nacl_sess pointer will be set to the |
| 352 | * last active I_T Nexus for each struct se_node_acl. |
| 353 | */ |
| 354 | se_nacl->nacl_sess = se_sess; |
| 355 | |
| 356 | list_add_tail(&se_sess->sess_acl_list, |
| 357 | &se_nacl->acl_sess_list); |
| 358 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 359 | } |
| 360 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); |
| 361 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 362 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 363 | 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] | 364 | } |
| 365 | EXPORT_SYMBOL(__transport_register_session); |
| 366 | |
| 367 | void transport_register_session( |
| 368 | struct se_portal_group *se_tpg, |
| 369 | struct se_node_acl *se_nacl, |
| 370 | struct se_session *se_sess, |
| 371 | void *fabric_sess_ptr) |
| 372 | { |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 373 | unsigned long flags; |
| 374 | |
| 375 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 376 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 377 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | } |
| 379 | EXPORT_SYMBOL(transport_register_session); |
| 380 | |
Fengguang Wu | ecf0dd6 | 2012-10-10 07:30:20 +0800 | [diff] [blame] | 381 | static void target_release_session(struct kref *kref) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 382 | { |
| 383 | struct se_session *se_sess = container_of(kref, |
| 384 | struct se_session, sess_kref); |
| 385 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
| 386 | |
| 387 | se_tpg->se_tpg_tfo->close_session(se_sess); |
| 388 | } |
| 389 | |
| 390 | void target_get_session(struct se_session *se_sess) |
| 391 | { |
| 392 | kref_get(&se_sess->sess_kref); |
| 393 | } |
| 394 | EXPORT_SYMBOL(target_get_session); |
| 395 | |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 396 | void target_put_session(struct se_session *se_sess) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 397 | { |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 398 | kref_put(&se_sess->sess_kref, target_release_session); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 399 | } |
| 400 | EXPORT_SYMBOL(target_put_session); |
| 401 | |
Nicholas Bellinger | f8e471f | 2015-03-06 20:34:32 -0800 | [diff] [blame] | 402 | ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page) |
| 403 | { |
| 404 | struct se_session *se_sess; |
| 405 | ssize_t len = 0; |
| 406 | |
| 407 | spin_lock_bh(&se_tpg->session_lock); |
| 408 | list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) { |
| 409 | if (!se_sess->se_node_acl) |
| 410 | continue; |
| 411 | if (!se_sess->se_node_acl->dynamic_node_acl) |
| 412 | continue; |
| 413 | if (strlen(se_sess->se_node_acl->initiatorname) + 1 + len > PAGE_SIZE) |
| 414 | break; |
| 415 | |
| 416 | len += snprintf(page + len, PAGE_SIZE - len, "%s\n", |
| 417 | se_sess->se_node_acl->initiatorname); |
| 418 | len += 1; /* Include NULL terminator */ |
| 419 | } |
| 420 | spin_unlock_bh(&se_tpg->session_lock); |
| 421 | |
| 422 | return len; |
| 423 | } |
| 424 | EXPORT_SYMBOL(target_show_dynamic_sessions); |
| 425 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 426 | static void target_complete_nacl(struct kref *kref) |
| 427 | { |
| 428 | struct se_node_acl *nacl = container_of(kref, |
| 429 | struct se_node_acl, acl_kref); |
| 430 | |
| 431 | complete(&nacl->acl_free_comp); |
| 432 | } |
| 433 | |
| 434 | void target_put_nacl(struct se_node_acl *nacl) |
| 435 | { |
| 436 | kref_put(&nacl->acl_kref, target_complete_nacl); |
| 437 | } |
| 438 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 439 | void transport_deregister_session_configfs(struct se_session *se_sess) |
| 440 | { |
| 441 | struct se_node_acl *se_nacl; |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 442 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 443 | /* |
| 444 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session |
| 445 | */ |
| 446 | se_nacl = se_sess->se_node_acl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 447 | if (se_nacl) { |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 448 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 449 | if (se_nacl->acl_stop == 0) |
| 450 | list_del(&se_sess->sess_acl_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 451 | /* |
| 452 | * If the session list is empty, then clear the pointer. |
| 453 | * Otherwise, set the struct se_session pointer from the tail |
| 454 | * element of the per struct se_node_acl active session list. |
| 455 | */ |
| 456 | if (list_empty(&se_nacl->acl_sess_list)) |
| 457 | se_nacl->nacl_sess = NULL; |
| 458 | else { |
| 459 | se_nacl->nacl_sess = container_of( |
| 460 | se_nacl->acl_sess_list.prev, |
| 461 | struct se_session, sess_acl_list); |
| 462 | } |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 463 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 464 | } |
| 465 | } |
| 466 | EXPORT_SYMBOL(transport_deregister_session_configfs); |
| 467 | |
| 468 | void transport_free_session(struct se_session *se_sess) |
| 469 | { |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 470 | if (se_sess->sess_cmd_map) { |
| 471 | percpu_ida_destroy(&se_sess->sess_tag_pool); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 472 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 473 | vfree(se_sess->sess_cmd_map); |
| 474 | else |
| 475 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 476 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 477 | kmem_cache_free(se_sess_cache, se_sess); |
| 478 | } |
| 479 | EXPORT_SYMBOL(transport_free_session); |
| 480 | |
| 481 | void transport_deregister_session(struct se_session *se_sess) |
| 482 | { |
| 483 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 484 | const struct target_core_fabric_ops *se_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 485 | struct se_node_acl *se_nacl; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 486 | unsigned long flags; |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 487 | bool comp_nacl = true, drop_nacl = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 488 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 489 | if (!se_tpg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 490 | transport_free_session(se_sess); |
| 491 | return; |
| 492 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 493 | se_tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 494 | |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 495 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 496 | list_del(&se_sess->sess_list); |
| 497 | se_sess->se_tpg = NULL; |
| 498 | se_sess->fabric_sess_ptr = NULL; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 499 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 500 | |
| 501 | /* |
| 502 | * Determine if we need to do extra work for this initiator node's |
| 503 | * struct se_node_acl if it had been previously dynamically generated. |
| 504 | */ |
| 505 | se_nacl = se_sess->se_node_acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 506 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 507 | mutex_lock(&se_tpg->acl_node_mutex); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 508 | if (se_nacl && se_nacl->dynamic_node_acl) { |
| 509 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { |
| 510 | list_del(&se_nacl->acl_list); |
| 511 | se_tpg->num_node_acls--; |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 512 | drop_nacl = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 513 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 514 | } |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 515 | mutex_unlock(&se_tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 516 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 517 | if (drop_nacl) { |
| 518 | core_tpg_wait_for_nacl_pr_ref(se_nacl); |
| 519 | core_free_device_list_for_node(se_nacl, se_tpg); |
| 520 | kfree(se_nacl); |
| 521 | comp_nacl = false; |
| 522 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 523 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 524 | se_tpg->se_tpg_tfo->get_fabric_name()); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 525 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 526 | * If last kref is dropping now for an explicit NodeACL, awake sleeping |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 527 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
| 528 | * removal context. |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 529 | */ |
Christophe Vu-Brugier | 0bcc297 | 2014-06-06 17:15:16 +0200 | [diff] [blame] | 530 | if (se_nacl && comp_nacl) |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 531 | target_put_nacl(se_nacl); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 532 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 533 | transport_free_session(se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 534 | } |
| 535 | EXPORT_SYMBOL(transport_deregister_session); |
| 536 | |
| 537 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 538 | * Called with cmd->t_state_lock held. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 539 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 540 | static void target_remove_from_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 541 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 542 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 543 | unsigned long flags; |
| 544 | |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 545 | if (!dev) |
| 546 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 547 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 548 | if (cmd->transport_state & CMD_T_BUSY) |
| 549 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 550 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 551 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 552 | if (cmd->state_active) { |
| 553 | list_del(&cmd->state_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 554 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 555 | } |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 556 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 557 | } |
| 558 | |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 559 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
| 560 | bool write_pending) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 561 | { |
| 562 | unsigned long flags; |
| 563 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 564 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 565 | if (write_pending) |
| 566 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
| 567 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 568 | if (remove_from_lists) { |
| 569 | target_remove_from_state_list(cmd); |
| 570 | |
| 571 | /* |
| 572 | * Clear struct se_cmd->se_lun before the handoff to FE. |
| 573 | */ |
| 574 | cmd->se_lun = NULL; |
| 575 | } |
| 576 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 577 | /* |
| 578 | * Determine if frontend context caller is requesting the stopping of |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 579 | * this command for frontend exceptions. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 580 | */ |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 581 | if (cmd->transport_state & CMD_T_STOP) { |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 582 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08llx\n", |
| 583 | __func__, __LINE__, cmd->tag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 584 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 585 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 586 | |
Nicholas Bellinger | a95d651 | 2014-06-09 23:36:51 +0000 | [diff] [blame] | 587 | complete_all(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 588 | return 1; |
| 589 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 590 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 591 | cmd->transport_state &= ~CMD_T_ACTIVE; |
| 592 | if (remove_from_lists) { |
| 593 | /* |
| 594 | * Some fabric modules like tcm_loop can release |
| 595 | * their internally allocated I/O reference now and |
| 596 | * struct se_cmd now. |
| 597 | * |
| 598 | * Fabric modules are expected to return '1' here if the |
| 599 | * se_cmd being passed is released at this point, |
| 600 | * or zero if not being released. |
| 601 | */ |
| 602 | if (cmd->se_tfo->check_stop_free != NULL) { |
| 603 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 604 | return cmd->se_tfo->check_stop_free(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 605 | } |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 606 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 607 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 608 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) |
| 613 | { |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 614 | return transport_cmd_check_stop(cmd, true, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | static void transport_lun_remove_cmd(struct se_cmd *cmd) |
| 618 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 619 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 620 | |
Nicholas Bellinger | 5259a06 | 2014-01-28 17:56:30 -0800 | [diff] [blame] | 621 | if (!lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 622 | return; |
| 623 | |
Nicholas Bellinger | 5259a06 | 2014-01-28 17:56:30 -0800 | [diff] [blame] | 624 | if (cmpxchg(&cmd->lun_ref_active, true, false)) |
| 625 | percpu_ref_put(&lun->lun_ref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) |
| 629 | { |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 630 | if (cmd->se_cmd_flags & SCF_SE_LUN_CMD) |
| 631 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | 131e6ab | 2014-03-22 14:55:56 -0700 | [diff] [blame] | 632 | /* |
| 633 | * Allow the fabric driver to unmap any resources before |
| 634 | * releasing the descriptor via TFO->release_cmd() |
| 635 | */ |
| 636 | if (remove) |
| 637 | cmd->se_tfo->aborted_task(cmd); |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 638 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 639 | if (transport_cmd_check_stop_to_fabric(cmd)) |
| 640 | return; |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 641 | if (remove) |
Christoph Hellwig | e6a2573 | 2011-09-13 23:08:50 +0200 | [diff] [blame] | 642 | transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 643 | } |
| 644 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 645 | static void target_complete_failure_work(struct work_struct *work) |
| 646 | { |
| 647 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
| 648 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 649 | transport_generic_request_failure(cmd, |
| 650 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 651 | } |
| 652 | |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 653 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 654 | * Used when asking transport to copy Sense Data from the underlying |
| 655 | * Linux/SCSI struct scsi_cmnd |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 656 | */ |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 657 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 658 | { |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 659 | struct se_device *dev = cmd->se_dev; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 660 | |
| 661 | WARN_ON(!cmd->se_lun); |
| 662 | |
| 663 | if (!dev) |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 664 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 665 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 666 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
| 667 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 668 | |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 669 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
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 | 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] | 672 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 673 | return cmd->sense_buffer; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 674 | } |
| 675 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 676 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 677 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 678 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 679 | int success = scsi_status == GOOD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 680 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 681 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 682 | cmd->scsi_status = scsi_status; |
| 683 | |
| 684 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 685 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 686 | cmd->transport_state &= ~CMD_T_BUSY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 687 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 688 | if (dev && dev->transport->transport_complete) { |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 689 | dev->transport->transport_complete(cmd, |
| 690 | cmd->t_data_sg, |
| 691 | transport_get_sense_buffer(cmd)); |
| 692 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 693 | success = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | /* |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 697 | * See if we are waiting to complete for an exception condition. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 698 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 699 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 700 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 701 | complete(&cmd->task_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 702 | return; |
| 703 | } |
Christoph Hellwig | 2235007c | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 704 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 705 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 706 | * Check for case where an explicit ABORT_TASK has been received |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 707 | * and transport_wait_for_tasks() will be waiting for completion.. |
| 708 | */ |
| 709 | if (cmd->transport_state & CMD_T_ABORTED && |
| 710 | cmd->transport_state & CMD_T_STOP) { |
| 711 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a95d651 | 2014-06-09 23:36:51 +0000 | [diff] [blame] | 712 | complete_all(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 713 | return; |
Roland Dreier | 3dca147 | 2014-02-03 14:08:26 -0800 | [diff] [blame] | 714 | } else if (!success) { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 715 | INIT_WORK(&cmd->work, target_complete_failure_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 716 | } else { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 717 | INIT_WORK(&cmd->work, target_complete_ok_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 718 | } |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 719 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 720 | cmd->t_state = TRANSPORT_COMPLETE; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 721 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 722 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 723 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 724 | queue_work(target_completion_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 725 | } |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 726 | EXPORT_SYMBOL(target_complete_cmd); |
| 727 | |
Roland Dreier | 2426bd4 | 2014-06-10 11:07:47 -0700 | [diff] [blame] | 728 | void target_complete_cmd_with_length(struct se_cmd *cmd, u8 scsi_status, int length) |
| 729 | { |
| 730 | if (scsi_status == SAM_STAT_GOOD && length < cmd->data_length) { |
| 731 | if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { |
| 732 | cmd->residual_count += cmd->data_length - length; |
| 733 | } else { |
| 734 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 735 | cmd->residual_count = cmd->data_length - length; |
| 736 | } |
| 737 | |
| 738 | cmd->data_length = length; |
| 739 | } |
| 740 | |
| 741 | target_complete_cmd(cmd, scsi_status); |
| 742 | } |
| 743 | EXPORT_SYMBOL(target_complete_cmd_with_length); |
| 744 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 745 | static void target_add_to_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 746 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 747 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 748 | unsigned long flags; |
| 749 | |
Nicholas Bellinger | 4d2300c | 2011-11-30 18:18:33 -0800 | [diff] [blame] | 750 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 751 | if (!cmd->state_active) { |
| 752 | list_add_tail(&cmd->state_list, &dev->state_list); |
| 753 | cmd->state_active = true; |
| 754 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 755 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 756 | } |
| 757 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 758 | /* |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 759 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 760 | */ |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 761 | static void transport_write_pending_qf(struct se_cmd *cmd); |
| 762 | static void transport_complete_qf(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 763 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 764 | void target_qf_do_work(struct work_struct *work) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 765 | { |
| 766 | struct se_device *dev = container_of(work, struct se_device, |
| 767 | qf_work_queue); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 768 | LIST_HEAD(qf_cmd_list); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 769 | struct se_cmd *cmd, *cmd_tmp; |
| 770 | |
| 771 | spin_lock_irq(&dev->qf_cmd_lock); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 772 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
| 773 | spin_unlock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 774 | |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 775 | 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] | 776 | list_del(&cmd->se_qf_node); |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 777 | atomic_dec_mb(&dev->dev_qf_count); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 778 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 779 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 780 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 781 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 782 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
| 783 | : "UNKNOWN"); |
Christoph Hellwig | f7a5cc0 | 2011-10-17 13:56:42 -0400 | [diff] [blame] | 784 | |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 785 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
| 786 | transport_write_pending_qf(cmd); |
| 787 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) |
| 788 | transport_complete_qf(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 789 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 790 | } |
| 791 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 792 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
| 793 | { |
| 794 | switch (cmd->data_direction) { |
| 795 | case DMA_NONE: |
| 796 | return "NONE"; |
| 797 | case DMA_FROM_DEVICE: |
| 798 | return "READ"; |
| 799 | case DMA_TO_DEVICE: |
| 800 | return "WRITE"; |
| 801 | case DMA_BIDIRECTIONAL: |
| 802 | return "BIDI"; |
| 803 | default: |
| 804 | break; |
| 805 | } |
| 806 | |
| 807 | return "UNKNOWN"; |
| 808 | } |
| 809 | |
| 810 | void transport_dump_dev_state( |
| 811 | struct se_device *dev, |
| 812 | char *b, |
| 813 | int *bl) |
| 814 | { |
| 815 | *bl += sprintf(b + *bl, "Status: "); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 816 | if (dev->export_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 817 | *bl += sprintf(b + *bl, "ACTIVATED"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 818 | else |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 819 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 820 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 821 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
Nicholas Bellinger | 11e764b | 2012-05-09 12:42:09 -0700 | [diff] [blame] | 822 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 823 | dev->dev_attrib.block_size, |
| 824 | dev->dev_attrib.hw_max_sectors); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 825 | *bl += sprintf(b + *bl, " "); |
| 826 | } |
| 827 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 828 | void transport_dump_vpd_proto_id( |
| 829 | struct t10_vpd *vpd, |
| 830 | unsigned char *p_buf, |
| 831 | int p_buf_len) |
| 832 | { |
| 833 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 834 | int len; |
| 835 | |
| 836 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 837 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); |
| 838 | |
| 839 | switch (vpd->protocol_identifier) { |
| 840 | case 0x00: |
| 841 | sprintf(buf+len, "Fibre Channel\n"); |
| 842 | break; |
| 843 | case 0x10: |
| 844 | sprintf(buf+len, "Parallel SCSI\n"); |
| 845 | break; |
| 846 | case 0x20: |
| 847 | sprintf(buf+len, "SSA\n"); |
| 848 | break; |
| 849 | case 0x30: |
| 850 | sprintf(buf+len, "IEEE 1394\n"); |
| 851 | break; |
| 852 | case 0x40: |
| 853 | sprintf(buf+len, "SCSI Remote Direct Memory Access" |
| 854 | " Protocol\n"); |
| 855 | break; |
| 856 | case 0x50: |
| 857 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); |
| 858 | break; |
| 859 | case 0x60: |
| 860 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); |
| 861 | break; |
| 862 | case 0x70: |
| 863 | sprintf(buf+len, "Automation/Drive Interface Transport" |
| 864 | " Protocol\n"); |
| 865 | break; |
| 866 | case 0x80: |
| 867 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); |
| 868 | break; |
| 869 | default: |
| 870 | sprintf(buf+len, "Unknown 0x%02x\n", |
| 871 | vpd->protocol_identifier); |
| 872 | break; |
| 873 | } |
| 874 | |
| 875 | if (p_buf) |
| 876 | strncpy(p_buf, buf, p_buf_len); |
| 877 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 878 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | void |
| 882 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) |
| 883 | { |
| 884 | /* |
| 885 | * Check if the Protocol Identifier Valid (PIV) bit is set.. |
| 886 | * |
| 887 | * from spc3r23.pdf section 7.5.1 |
| 888 | */ |
| 889 | if (page_83[1] & 0x80) { |
| 890 | vpd->protocol_identifier = (page_83[0] & 0xf0); |
| 891 | vpd->protocol_identifier_set = 1; |
| 892 | transport_dump_vpd_proto_id(vpd, NULL, 0); |
| 893 | } |
| 894 | } |
| 895 | EXPORT_SYMBOL(transport_set_vpd_proto_id); |
| 896 | |
| 897 | int transport_dump_vpd_assoc( |
| 898 | struct t10_vpd *vpd, |
| 899 | unsigned char *p_buf, |
| 900 | int p_buf_len) |
| 901 | { |
| 902 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 903 | int ret = 0; |
| 904 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 905 | |
| 906 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 907 | len = sprintf(buf, "T10 VPD Identifier Association: "); |
| 908 | |
| 909 | switch (vpd->association) { |
| 910 | case 0x00: |
| 911 | sprintf(buf+len, "addressed logical unit\n"); |
| 912 | break; |
| 913 | case 0x10: |
| 914 | sprintf(buf+len, "target port\n"); |
| 915 | break; |
| 916 | case 0x20: |
| 917 | sprintf(buf+len, "SCSI target device\n"); |
| 918 | break; |
| 919 | default: |
| 920 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 921 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 922 | break; |
| 923 | } |
| 924 | |
| 925 | if (p_buf) |
| 926 | strncpy(p_buf, buf, p_buf_len); |
| 927 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 928 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 929 | |
| 930 | return ret; |
| 931 | } |
| 932 | |
| 933 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) |
| 934 | { |
| 935 | /* |
| 936 | * The VPD identification association.. |
| 937 | * |
| 938 | * from spc3r23.pdf Section 7.6.3.1 Table 297 |
| 939 | */ |
| 940 | vpd->association = (page_83[1] & 0x30); |
| 941 | return transport_dump_vpd_assoc(vpd, NULL, 0); |
| 942 | } |
| 943 | EXPORT_SYMBOL(transport_set_vpd_assoc); |
| 944 | |
| 945 | int transport_dump_vpd_ident_type( |
| 946 | struct t10_vpd *vpd, |
| 947 | unsigned char *p_buf, |
| 948 | int p_buf_len) |
| 949 | { |
| 950 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 951 | int ret = 0; |
| 952 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 953 | |
| 954 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 955 | len = sprintf(buf, "T10 VPD Identifier Type: "); |
| 956 | |
| 957 | switch (vpd->device_identifier_type) { |
| 958 | case 0x00: |
| 959 | sprintf(buf+len, "Vendor specific\n"); |
| 960 | break; |
| 961 | case 0x01: |
| 962 | sprintf(buf+len, "T10 Vendor ID based\n"); |
| 963 | break; |
| 964 | case 0x02: |
| 965 | sprintf(buf+len, "EUI-64 based\n"); |
| 966 | break; |
| 967 | case 0x03: |
| 968 | sprintf(buf+len, "NAA\n"); |
| 969 | break; |
| 970 | case 0x04: |
| 971 | sprintf(buf+len, "Relative target port identifier\n"); |
| 972 | break; |
| 973 | case 0x08: |
| 974 | sprintf(buf+len, "SCSI name string\n"); |
| 975 | break; |
| 976 | default: |
| 977 | sprintf(buf+len, "Unsupported: 0x%02x\n", |
| 978 | vpd->device_identifier_type); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 979 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 980 | break; |
| 981 | } |
| 982 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 983 | if (p_buf) { |
| 984 | if (p_buf_len < strlen(buf)+1) |
| 985 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 986 | strncpy(p_buf, buf, p_buf_len); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 987 | } else { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 988 | pr_debug("%s", buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 989 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 990 | |
| 991 | return ret; |
| 992 | } |
| 993 | |
| 994 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) |
| 995 | { |
| 996 | /* |
| 997 | * The VPD identifier type.. |
| 998 | * |
| 999 | * from spc3r23.pdf Section 7.6.3.1 Table 298 |
| 1000 | */ |
| 1001 | vpd->device_identifier_type = (page_83[1] & 0x0f); |
| 1002 | return transport_dump_vpd_ident_type(vpd, NULL, 0); |
| 1003 | } |
| 1004 | EXPORT_SYMBOL(transport_set_vpd_ident_type); |
| 1005 | |
| 1006 | int transport_dump_vpd_ident( |
| 1007 | struct t10_vpd *vpd, |
| 1008 | unsigned char *p_buf, |
| 1009 | int p_buf_len) |
| 1010 | { |
| 1011 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 1012 | int ret = 0; |
| 1013 | |
| 1014 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 1015 | |
| 1016 | switch (vpd->device_identifier_code_set) { |
| 1017 | case 0x01: /* Binary */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 1018 | snprintf(buf, sizeof(buf), |
| 1019 | "T10 VPD Binary Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1020 | &vpd->device_identifier[0]); |
| 1021 | break; |
| 1022 | case 0x02: /* ASCII */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 1023 | snprintf(buf, sizeof(buf), |
| 1024 | "T10 VPD ASCII Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1025 | &vpd->device_identifier[0]); |
| 1026 | break; |
| 1027 | case 0x03: /* UTF-8 */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 1028 | snprintf(buf, sizeof(buf), |
| 1029 | "T10 VPD UTF-8 Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1030 | &vpd->device_identifier[0]); |
| 1031 | break; |
| 1032 | default: |
| 1033 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" |
| 1034 | " 0x%02x", vpd->device_identifier_code_set); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1035 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1036 | break; |
| 1037 | } |
| 1038 | |
| 1039 | if (p_buf) |
| 1040 | strncpy(p_buf, buf, p_buf_len); |
| 1041 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1042 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1043 | |
| 1044 | return ret; |
| 1045 | } |
| 1046 | |
| 1047 | int |
| 1048 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) |
| 1049 | { |
| 1050 | static const char hex_str[] = "0123456789abcdef"; |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 1051 | int j = 0, i = 4; /* offset to start of the identifier */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1052 | |
| 1053 | /* |
| 1054 | * The VPD Code Set (encoding) |
| 1055 | * |
| 1056 | * from spc3r23.pdf Section 7.6.3.1 Table 296 |
| 1057 | */ |
| 1058 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); |
| 1059 | switch (vpd->device_identifier_code_set) { |
| 1060 | case 0x01: /* Binary */ |
| 1061 | vpd->device_identifier[j++] = |
| 1062 | hex_str[vpd->device_identifier_type]; |
| 1063 | while (i < (4 + page_83[3])) { |
| 1064 | vpd->device_identifier[j++] = |
| 1065 | hex_str[(page_83[i] & 0xf0) >> 4]; |
| 1066 | vpd->device_identifier[j++] = |
| 1067 | hex_str[page_83[i] & 0x0f]; |
| 1068 | i++; |
| 1069 | } |
| 1070 | break; |
| 1071 | case 0x02: /* ASCII */ |
| 1072 | case 0x03: /* UTF-8 */ |
| 1073 | while (i < (4 + page_83[3])) |
| 1074 | vpd->device_identifier[j++] = page_83[i++]; |
| 1075 | break; |
| 1076 | default: |
| 1077 | break; |
| 1078 | } |
| 1079 | |
| 1080 | return transport_dump_vpd_ident(vpd, NULL, 0); |
| 1081 | } |
| 1082 | EXPORT_SYMBOL(transport_set_vpd_ident); |
| 1083 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1084 | sense_reason_t |
| 1085 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1086 | { |
| 1087 | struct se_device *dev = cmd->se_dev; |
| 1088 | |
| 1089 | if (cmd->unknown_data_length) { |
| 1090 | cmd->data_length = size; |
| 1091 | } else if (size != cmd->data_length) { |
| 1092 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
| 1093 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
| 1094 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
| 1095 | cmd->data_length, size, cmd->t_task_cdb[0]); |
| 1096 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1097 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 1098 | pr_err("Rejecting underflow/overflow" |
| 1099 | " WRITE data\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1100 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1101 | } |
| 1102 | /* |
| 1103 | * Reject READ_* or WRITE_* with overflow/underflow for |
| 1104 | * type SCF_SCSI_DATA_CDB. |
| 1105 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1106 | if (dev->dev_attrib.block_size != 512) { |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1107 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
| 1108 | " CDB on non 512-byte sector setup subsystem" |
| 1109 | " plugin: %s\n", dev->transport->name); |
| 1110 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1111 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1112 | } |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1113 | /* |
| 1114 | * For the overflow case keep the existing fabric provided |
| 1115 | * ->data_length. Otherwise for the underflow case, reset |
| 1116 | * ->data_length to the smaller SCSI expected data transfer |
| 1117 | * length. |
| 1118 | */ |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1119 | if (size > cmd->data_length) { |
| 1120 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; |
| 1121 | cmd->residual_count = (size - cmd->data_length); |
| 1122 | } else { |
| 1123 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 1124 | cmd->residual_count = (cmd->data_length - size); |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1125 | cmd->data_length = size; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1126 | } |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | return 0; |
| 1130 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1131 | } |
| 1132 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1133 | /* |
| 1134 | * Used by fabric modules containing a local struct se_cmd within their |
| 1135 | * fabric dependent per I/O descriptor. |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1136 | * |
| 1137 | * Preserves the value of @cmd->tag. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1138 | */ |
| 1139 | void transport_init_se_cmd( |
| 1140 | struct se_cmd *cmd, |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 1141 | const struct target_core_fabric_ops *tfo, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1142 | struct se_session *se_sess, |
| 1143 | u32 data_length, |
| 1144 | int data_direction, |
| 1145 | int task_attr, |
| 1146 | unsigned char *sense_buffer) |
| 1147 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1148 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1149 | INIT_LIST_HEAD(&cmd->se_qf_node); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1150 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1151 | INIT_LIST_HEAD(&cmd->state_list); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1152 | init_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1153 | init_completion(&cmd->cmd_wait_comp); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1154 | init_completion(&cmd->task_stop_comp); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1155 | spin_lock_init(&cmd->t_state_lock); |
Mikulas Patocka | 1e1110c | 2014-05-17 06:49:22 -0400 | [diff] [blame] | 1156 | kref_init(&cmd->cmd_kref); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1157 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1158 | |
| 1159 | cmd->se_tfo = tfo; |
| 1160 | cmd->se_sess = se_sess; |
| 1161 | cmd->data_length = data_length; |
| 1162 | cmd->data_direction = data_direction; |
| 1163 | cmd->sam_task_attr = task_attr; |
| 1164 | cmd->sense_buffer = sense_buffer; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1165 | |
| 1166 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1167 | } |
| 1168 | EXPORT_SYMBOL(transport_init_se_cmd); |
| 1169 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1170 | static sense_reason_t |
| 1171 | transport_check_alloc_task_attr(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1172 | { |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1173 | struct se_device *dev = cmd->se_dev; |
| 1174 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1175 | /* |
| 1176 | * Check if SAM Task Attribute emulation is enabled for this |
| 1177 | * struct se_device storage object |
| 1178 | */ |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1179 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1180 | return 0; |
| 1181 | |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1182 | if (cmd->sam_task_attr == TCM_ACA_TAG) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1183 | pr_debug("SAM Task Attribute ACA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1184 | " emulation is not supported\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1185 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1186 | } |
| 1187 | /* |
| 1188 | * Used to determine when ORDERED commands should go from |
| 1189 | * Dormant to Active status. |
| 1190 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1191 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1192 | 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] | 1193 | cmd->se_ordered_id, cmd->sam_task_attr, |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1194 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1195 | return 0; |
| 1196 | } |
| 1197 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1198 | sense_reason_t |
| 1199 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1200 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1201 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1202 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1203 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1204 | /* |
| 1205 | * Ensure that the received CDB is less than the max (252 + 8) bytes |
| 1206 | * for VARIABLE_LENGTH_CMD |
| 1207 | */ |
| 1208 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1209 | pr_err("Received SCSI CDB with command_size: %d that" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1210 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
| 1211 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1212 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1213 | } |
| 1214 | /* |
| 1215 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, |
| 1216 | * allocate the additional extended CDB buffer now.. Otherwise |
| 1217 | * setup the pointer from __t_task_cdb to t_task_cdb. |
| 1218 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1219 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
| 1220 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1221 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1222 | if (!cmd->t_task_cdb) { |
| 1223 | pr_err("Unable to allocate cmd->t_task_cdb" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1224 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1225 | scsi_command_size(cdb), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1226 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1227 | return TCM_OUT_OF_RESOURCES; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1228 | } |
| 1229 | } else |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1230 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1231 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1232 | * Copy the original CDB into cmd-> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1233 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1234 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1235 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1236 | trace_target_sequencer_start(cmd); |
| 1237 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1238 | /* |
| 1239 | * Check for an existing UNIT ATTENTION condition |
| 1240 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1241 | ret = target_scsi3_ua_check(cmd); |
| 1242 | if (ret) |
| 1243 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1244 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1245 | ret = target_alua_state_check(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1246 | if (ret) |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1247 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1248 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1249 | ret = target_check_reservation(cmd); |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1250 | if (ret) { |
| 1251 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1252 | return ret; |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1253 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1254 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1255 | ret = dev->transport->parse_cdb(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1256 | if (ret) |
| 1257 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1258 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1259 | ret = transport_check_alloc_task_attr(cmd); |
| 1260 | if (ret) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1261 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1262 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1263 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1264 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1265 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame^] | 1266 | cmd->se_lun->lun_stats.cmd_pdus++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1267 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1268 | return 0; |
| 1269 | } |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1270 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1271 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1272 | /* |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1273 | * Used by fabric module frontends to queue tasks directly. |
| 1274 | * Many only be used from process context only |
| 1275 | */ |
| 1276 | int transport_handle_cdb_direct( |
| 1277 | struct se_cmd *cmd) |
| 1278 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1279 | sense_reason_t ret; |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1280 | |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1281 | if (!cmd->se_lun) { |
| 1282 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1283 | pr_err("cmd->se_lun is NULL\n"); |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1284 | return -EINVAL; |
| 1285 | } |
| 1286 | if (in_interrupt()) { |
| 1287 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1288 | pr_err("transport_generic_handle_cdb cannot be called" |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1289 | " from interrupt context\n"); |
| 1290 | return -EINVAL; |
| 1291 | } |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1292 | /* |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 1293 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
| 1294 | * outstanding descriptors are handled correctly during shutdown via |
| 1295 | * transport_wait_for_tasks() |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1296 | * |
| 1297 | * Also, we don't take cmd->t_state_lock here as we only expect |
| 1298 | * this to be called for initial descriptor submission. |
| 1299 | */ |
| 1300 | cmd->t_state = TRANSPORT_NEW_CMD; |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1301 | cmd->transport_state |= CMD_T_ACTIVE; |
| 1302 | |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1303 | /* |
| 1304 | * transport_generic_new_cmd() is already handling QUEUE_FULL, |
| 1305 | * so follow TRANSPORT_NEW_CMD processing thread context usage |
| 1306 | * and call transport_generic_request_failure() if necessary.. |
| 1307 | */ |
| 1308 | ret = transport_generic_new_cmd(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1309 | if (ret) |
| 1310 | transport_generic_request_failure(cmd, ret); |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1311 | return 0; |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1312 | } |
| 1313 | EXPORT_SYMBOL(transport_handle_cdb_direct); |
| 1314 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 1315 | sense_reason_t |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1316 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
| 1317 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
| 1318 | { |
| 1319 | if (!sgl || !sgl_count) |
| 1320 | return 0; |
| 1321 | |
| 1322 | /* |
| 1323 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming |
| 1324 | * scatterlists already have been set to follow what the fabric |
| 1325 | * passes for the original expected data transfer length. |
| 1326 | */ |
| 1327 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { |
| 1328 | pr_warn("Rejecting SCSI DATA overflow for fabric using" |
| 1329 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); |
| 1330 | return TCM_INVALID_CDB_FIELD; |
| 1331 | } |
| 1332 | |
| 1333 | cmd->t_data_sg = sgl; |
| 1334 | cmd->t_data_nents = sgl_count; |
Ilias Tsitsimpis | b32bd0a | 2015-04-23 21:30:07 +0300 | [diff] [blame] | 1335 | cmd->t_bidi_data_sg = sgl_bidi; |
| 1336 | cmd->t_bidi_data_nents = sgl_bidi_count; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1337 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1338 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 1339 | return 0; |
| 1340 | } |
| 1341 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1342 | /* |
| 1343 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized |
| 1344 | * se_cmd + use pre-allocated SGL memory. |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1345 | * |
| 1346 | * @se_cmd: command descriptor to submit |
| 1347 | * @se_sess: associated se_sess for endpoint |
| 1348 | * @cdb: pointer to SCSI CDB |
| 1349 | * @sense: pointer to SCSI sense buffer |
| 1350 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1351 | * @data_length: fabric expected data transfer length |
| 1352 | * @task_addr: SAM task attribute |
| 1353 | * @data_dir: DMA data direction |
| 1354 | * @flags: flags for command submission from target_sc_flags_tables |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1355 | * @sgl: struct scatterlist memory for unidirectional mapping |
| 1356 | * @sgl_count: scatterlist count for unidirectional mapping |
| 1357 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping |
| 1358 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1359 | * @sgl_prot: struct scatterlist memory protection information |
| 1360 | * @sgl_prot_count: scatterlist count for protection information |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1361 | * |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1362 | * Task tags are supported if the caller has set @se_cmd->tag. |
| 1363 | * |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1364 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1365 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1366 | * but still return zero here. |
| 1367 | * |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1368 | * This may only be called from process context, and also currently |
| 1369 | * assumes internal allocation of fabric payload buffer by target-core. |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1370 | */ |
| 1371 | 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] | 1372 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1373 | u32 data_length, int task_attr, int data_dir, int flags, |
| 1374 | struct scatterlist *sgl, u32 sgl_count, |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1375 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count, |
| 1376 | struct scatterlist *sgl_prot, u32 sgl_prot_count) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1377 | { |
| 1378 | struct se_portal_group *se_tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1379 | sense_reason_t rc; |
| 1380 | int ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1381 | |
| 1382 | se_tpg = se_sess->se_tpg; |
| 1383 | BUG_ON(!se_tpg); |
| 1384 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); |
| 1385 | BUG_ON(in_interrupt()); |
| 1386 | /* |
| 1387 | * Initialize se_cmd for target operation. From this point |
| 1388 | * exceptions are handled by sending exception status via |
| 1389 | * target_core_fabric_ops->queue_status() callback |
| 1390 | */ |
| 1391 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1392 | data_length, data_dir, task_attr, sense); |
Sebastian Andrzej Siewior | b0d7994 | 2012-01-10 14:16:59 +0100 | [diff] [blame] | 1393 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
| 1394 | se_cmd->unknown_data_length = 1; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1395 | /* |
| 1396 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to |
| 1397 | * se_sess->sess_cmd_list. A second kref_get here is necessary |
| 1398 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second |
| 1399 | * kref_put() to happen during fabric packet acknowledgement. |
| 1400 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 1401 | ret = target_get_sess_cmd(se_cmd, flags & TARGET_SCF_ACK_KREF); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1402 | if (ret) |
| 1403 | return ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1404 | /* |
| 1405 | * Signal bidirectional data payloads to target-core |
| 1406 | */ |
| 1407 | if (flags & TARGET_SCF_BIDI_OP) |
| 1408 | se_cmd->se_cmd_flags |= SCF_BIDI; |
| 1409 | /* |
| 1410 | * Locate se_lun pointer and attach it to struct se_cmd |
| 1411 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1412 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
| 1413 | if (rc) { |
| 1414 | transport_send_check_condition_and_sense(se_cmd, rc, 0); |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 1415 | target_put_sess_cmd(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1416 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1417 | } |
Sagi Grimberg | b5b8e29 | 2014-02-19 17:50:17 +0200 | [diff] [blame] | 1418 | |
| 1419 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
| 1420 | if (rc != 0) { |
| 1421 | transport_generic_request_failure(se_cmd, rc); |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1425 | /* |
| 1426 | * Save pointers for SGLs containing protection information, |
| 1427 | * if present. |
| 1428 | */ |
| 1429 | if (sgl_prot_count) { |
| 1430 | se_cmd->t_prot_sg = sgl_prot; |
| 1431 | se_cmd->t_prot_nents = sgl_prot_count; |
Akinobu Mita | 5835812 | 2015-05-01 15:23:49 +0900 | [diff] [blame] | 1432 | se_cmd->se_cmd_flags |= SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC; |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1433 | } |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1434 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1435 | /* |
| 1436 | * When a non zero sgl_count has been passed perform SGL passthrough |
| 1437 | * mapping for pre-allocated fabric memory instead of having target |
| 1438 | * core perform an internal SGL allocation.. |
| 1439 | */ |
| 1440 | if (sgl_count != 0) { |
| 1441 | BUG_ON(!sgl); |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1442 | |
Nicholas Bellinger | 944981c | 2012-10-02 14:00:33 -0700 | [diff] [blame] | 1443 | /* |
| 1444 | * A work-around for tcm_loop as some userspace code via |
| 1445 | * scsi-generic do not memset their associated read buffers, |
| 1446 | * so go ahead and do that here for type non-data CDBs. Also |
| 1447 | * note that this is currently guaranteed to be a single SGL |
| 1448 | * for this case by target core in target_setup_cmd_from_cdb() |
| 1449 | * -> transport_generic_cmd_sequencer(). |
| 1450 | */ |
| 1451 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && |
| 1452 | se_cmd->data_direction == DMA_FROM_DEVICE) { |
| 1453 | unsigned char *buf = NULL; |
| 1454 | |
| 1455 | if (sgl) |
| 1456 | buf = kmap(sg_page(sgl)) + sgl->offset; |
| 1457 | |
| 1458 | if (buf) { |
| 1459 | memset(buf, 0, sgl->length); |
| 1460 | kunmap(sg_page(sgl)); |
| 1461 | } |
| 1462 | } |
| 1463 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1464 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
| 1465 | sgl_bidi, sgl_bidi_count); |
| 1466 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1467 | transport_generic_request_failure(se_cmd, rc); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1468 | return 0; |
| 1469 | } |
| 1470 | } |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1471 | |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1472 | /* |
| 1473 | * Check if we need to delay processing because of ALUA |
| 1474 | * Active/NonOptimized primary access state.. |
| 1475 | */ |
| 1476 | core_alua_check_nonop_delay(se_cmd); |
| 1477 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1478 | transport_handle_cdb_direct(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1479 | return 0; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1480 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1481 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
| 1482 | |
| 1483 | /* |
| 1484 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd |
| 1485 | * |
| 1486 | * @se_cmd: command descriptor to submit |
| 1487 | * @se_sess: associated se_sess for endpoint |
| 1488 | * @cdb: pointer to SCSI CDB |
| 1489 | * @sense: pointer to SCSI sense buffer |
| 1490 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1491 | * @data_length: fabric expected data transfer length |
| 1492 | * @task_addr: SAM task attribute |
| 1493 | * @data_dir: DMA data direction |
| 1494 | * @flags: flags for command submission from target_sc_flags_tables |
| 1495 | * |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1496 | * Task tags are supported if the caller has set @se_cmd->tag. |
| 1497 | * |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1498 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1499 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1500 | * but still return zero here. |
| 1501 | * |
| 1502 | * This may only be called from process context, and also currently |
| 1503 | * assumes internal allocation of fabric payload buffer by target-core. |
| 1504 | * |
| 1505 | * It also assumes interal target core SGL memory allocation. |
| 1506 | */ |
| 1507 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
| 1508 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
| 1509 | u32 data_length, int task_attr, int data_dir, int flags) |
| 1510 | { |
| 1511 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, |
| 1512 | unpacked_lun, data_length, task_attr, data_dir, |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame] | 1513 | flags, NULL, 0, NULL, 0, NULL, 0); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1514 | } |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1515 | EXPORT_SYMBOL(target_submit_cmd); |
| 1516 | |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1517 | static void target_complete_tmr_failure(struct work_struct *work) |
| 1518 | { |
| 1519 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); |
| 1520 | |
| 1521 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; |
| 1522 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); |
Roland Dreier | 5a3b6fc0 | 2013-01-02 12:47:59 -0800 | [diff] [blame] | 1523 | |
| 1524 | transport_cmd_check_stop_to_fabric(se_cmd); |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1525 | } |
| 1526 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1527 | /** |
| 1528 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd |
| 1529 | * for TMR CDBs |
| 1530 | * |
| 1531 | * @se_cmd: command descriptor to submit |
| 1532 | * @se_sess: associated se_sess for endpoint |
| 1533 | * @sense: pointer to SCSI sense buffer |
| 1534 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1535 | * @fabric_context: fabric context for TMR req |
| 1536 | * @tm_type: Type of TM request |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1537 | * @gfp: gfp type for caller |
| 1538 | * @tag: referenced task tag for TMR_ABORT_TASK |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1539 | * @flags: submit cmd flags |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1540 | * |
| 1541 | * Callable from all contexts. |
| 1542 | **/ |
| 1543 | |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1544 | 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] | 1545 | unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1546 | void *fabric_tmr_ptr, unsigned char tm_type, |
| 1547 | gfp_t gfp, unsigned int tag, int flags) |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1548 | { |
| 1549 | struct se_portal_group *se_tpg; |
| 1550 | int ret; |
| 1551 | |
| 1552 | se_tpg = se_sess->se_tpg; |
| 1553 | BUG_ON(!se_tpg); |
| 1554 | |
| 1555 | 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] | 1556 | 0, DMA_NONE, TCM_SIMPLE_TAG, sense); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1557 | /* |
| 1558 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req |
| 1559 | * allocation failure. |
| 1560 | */ |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1561 | 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] | 1562 | if (ret < 0) |
| 1563 | return -ENOMEM; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1564 | |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1565 | if (tm_type == TMR_ABORT_TASK) |
| 1566 | se_cmd->se_tmr_req->ref_task_tag = tag; |
| 1567 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1568 | /* See target_submit_cmd for commentary */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 1569 | ret = target_get_sess_cmd(se_cmd, flags & TARGET_SCF_ACK_KREF); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 1570 | if (ret) { |
| 1571 | core_tmr_release_req(se_cmd->se_tmr_req); |
| 1572 | return ret; |
| 1573 | } |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1574 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1575 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
| 1576 | if (ret) { |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1577 | /* |
| 1578 | * For callback during failure handling, push this work off |
| 1579 | * to process context with TMR_LUN_DOES_NOT_EXIST status. |
| 1580 | */ |
| 1581 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); |
| 1582 | schedule_work(&se_cmd->work); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1583 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1584 | } |
| 1585 | transport_generic_handle_tmr(se_cmd); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1586 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1587 | } |
| 1588 | EXPORT_SYMBOL(target_submit_tmr); |
| 1589 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1590 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1591 | * 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] | 1592 | * has completed. |
| 1593 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1594 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
Bart Van Assche | cb0df4d | 2015-04-10 14:49:02 +0200 | [diff] [blame] | 1595 | __releases(&cmd->t_state_lock) |
| 1596 | __acquires(&cmd->t_state_lock) |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1597 | { |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1598 | bool was_active = false; |
| 1599 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1600 | if (cmd->transport_state & CMD_T_BUSY) { |
| 1601 | cmd->transport_state |= CMD_T_REQUEST_STOP; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1602 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
| 1603 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1604 | pr_debug("cmd %p waiting to complete\n", cmd); |
| 1605 | wait_for_completion(&cmd->task_stop_comp); |
| 1606 | pr_debug("cmd %p stopped successfully\n", cmd); |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1607 | |
| 1608 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1609 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
| 1610 | cmd->transport_state &= ~CMD_T_BUSY; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1611 | was_active = true; |
| 1612 | } |
| 1613 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1614 | return was_active; |
| 1615 | } |
| 1616 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1617 | /* |
| 1618 | * Handle SAM-esque emulation for generic transport request failures. |
| 1619 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1620 | void transport_generic_request_failure(struct se_cmd *cmd, |
| 1621 | sense_reason_t sense_reason) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1622 | { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1623 | int ret = 0; |
| 1624 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1625 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08llx" |
| 1626 | " CDB: 0x%02x\n", cmd, cmd->tag, cmd->t_task_cdb[0]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1627 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1628 | cmd->se_tfo->get_cmd_state(cmd), |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1629 | cmd->t_state, sense_reason); |
Christoph Hellwig | d43d6ae | 2012-04-24 00:25:08 -0400 | [diff] [blame] | 1630 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1631 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 1632 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 1633 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1634 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1635 | /* |
| 1636 | * For SAM Task Attribute emulation for failed struct se_cmd |
| 1637 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1638 | transport_complete_task_attr(cmd); |
Nicholas Bellinger | cf6d1f0 | 2013-08-21 19:34:43 -0700 | [diff] [blame] | 1639 | /* |
| 1640 | * Handle special case for COMPARE_AND_WRITE failure, where the |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 1641 | * callback is expected to drop the per device ->caw_sem. |
Nicholas Bellinger | cf6d1f0 | 2013-08-21 19:34:43 -0700 | [diff] [blame] | 1642 | */ |
| 1643 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 1644 | cmd->transport_complete_callback) |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 1645 | cmd->transport_complete_callback(cmd, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1646 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1647 | switch (sense_reason) { |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1648 | case TCM_NON_EXISTENT_LUN: |
| 1649 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 1650 | case TCM_INVALID_CDB_FIELD: |
| 1651 | case TCM_INVALID_PARAMETER_LIST: |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 1652 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1653 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 1654 | case TCM_UNKNOWN_MODE_PAGE: |
| 1655 | case TCM_WRITE_PROTECTED: |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 1656 | case TCM_ADDRESS_OUT_OF_RANGE: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1657 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 1658 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 1659 | case TCM_CHECK_CONDITION_NOT_READY: |
Nicholas Bellinger | 94387aa | 2014-02-23 14:04:09 +0000 | [diff] [blame] | 1660 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
| 1661 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: |
| 1662 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1663 | break; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1664 | case TCM_OUT_OF_RESOURCES: |
| 1665 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1666 | break; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1667 | case TCM_RESERVATION_CONFLICT: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1668 | /* |
| 1669 | * No SENSE Data payload for this case, set SCSI Status |
| 1670 | * and queue the response to $FABRIC_MOD. |
| 1671 | * |
| 1672 | * Uses linux/include/scsi/scsi.h SAM status codes defs |
| 1673 | */ |
| 1674 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
| 1675 | /* |
| 1676 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will |
| 1677 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION |
| 1678 | * CONFLICT STATUS. |
| 1679 | * |
| 1680 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 |
| 1681 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1682 | if (cmd->se_sess && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1683 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1684 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1685 | cmd->orig_fe_lun, 0x2C, |
| 1686 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); |
| 1687 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1688 | trace_target_cmd_complete(cmd); |
| 1689 | ret = cmd->se_tfo-> queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1690 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1691 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1692 | goto check_stop; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1693 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1694 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1695 | cmd->t_task_cdb[0], sense_reason); |
| 1696 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1697 | break; |
| 1698 | } |
Christoph Hellwig | f314643 | 2012-07-08 15:58:48 -0400 | [diff] [blame] | 1699 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1700 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1701 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1702 | goto queue_full; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1703 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1704 | check_stop: |
| 1705 | transport_lun_remove_cmd(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1706 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1707 | ; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1708 | return; |
| 1709 | |
| 1710 | queue_full: |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1711 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1712 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1713 | } |
Nicholas Bellinger | 2fbff127 | 2012-02-10 16:18:11 -0800 | [diff] [blame] | 1714 | EXPORT_SYMBOL(transport_generic_request_failure); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1715 | |
Nicholas Bellinger | 76dde50 | 2013-08-21 16:04:10 -0700 | [diff] [blame] | 1716 | void __target_execute_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1717 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1718 | sense_reason_t ret; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1719 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1720 | if (cmd->execute_cmd) { |
| 1721 | ret = cmd->execute_cmd(cmd); |
| 1722 | if (ret) { |
| 1723 | spin_lock_irq(&cmd->t_state_lock); |
| 1724 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
| 1725 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1726 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1727 | transport_generic_request_failure(cmd, ret); |
| 1728 | } |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1729 | } |
| 1730 | } |
| 1731 | |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1732 | static int target_write_prot_action(struct se_cmd *cmd) |
| 1733 | { |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1734 | u32 sectors; |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1735 | /* |
| 1736 | * Perform WRITE_INSERT of PI using software emulation when backend |
| 1737 | * device has PI enabled, if the transport has not already generated |
| 1738 | * PI using hardware WRITE_INSERT offload. |
| 1739 | */ |
| 1740 | switch (cmd->prot_op) { |
| 1741 | case TARGET_PROT_DOUT_INSERT: |
| 1742 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_INSERT)) |
| 1743 | sbc_dif_generate(cmd); |
| 1744 | break; |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1745 | case TARGET_PROT_DOUT_STRIP: |
| 1746 | if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_STRIP) |
| 1747 | break; |
| 1748 | |
| 1749 | sectors = cmd->data_length >> ilog2(cmd->se_dev->dev_attrib.block_size); |
Sagi Grimberg | f75b6fa | 2015-04-19 20:27:19 +0300 | [diff] [blame] | 1750 | cmd->pi_err = sbc_dif_verify(cmd, cmd->t_task_lba, |
| 1751 | sectors, 0, cmd->t_prot_sg, 0); |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1752 | if (unlikely(cmd->pi_err)) { |
| 1753 | spin_lock_irq(&cmd->t_state_lock); |
Bart Van Assche | 6c2faea | 2015-05-13 09:19:02 +0200 | [diff] [blame] | 1754 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
Nicholas Bellinger | 5132d1e | 2015-02-08 03:06:17 -0800 | [diff] [blame] | 1755 | spin_unlock_irq(&cmd->t_state_lock); |
| 1756 | transport_generic_request_failure(cmd, cmd->pi_err); |
| 1757 | return -1; |
| 1758 | } |
| 1759 | break; |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1760 | default: |
| 1761 | break; |
| 1762 | } |
| 1763 | |
| 1764 | return 0; |
| 1765 | } |
| 1766 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1767 | static bool target_handle_task_attr(struct se_cmd *cmd) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1768 | { |
| 1769 | struct se_device *dev = cmd->se_dev; |
| 1770 | |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1771 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1772 | return false; |
| 1773 | |
| 1774 | /* |
| 1775 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
| 1776 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
| 1777 | */ |
| 1778 | switch (cmd->sam_task_attr) { |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1779 | case TCM_HEAD_TAG: |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1780 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
| 1781 | "se_ordered_id: %u\n", |
| 1782 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1783 | return false; |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1784 | case TCM_ORDERED_TAG: |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1785 | atomic_inc_mb(&dev->dev_ordered_sync); |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1786 | |
| 1787 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
| 1788 | " se_ordered_id: %u\n", |
| 1789 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1790 | |
| 1791 | /* |
| 1792 | * Execute an ORDERED command if no other older commands |
| 1793 | * exist that need to be completed first. |
| 1794 | */ |
| 1795 | if (!atomic_read(&dev->simple_cmds)) |
| 1796 | return false; |
| 1797 | break; |
| 1798 | default: |
| 1799 | /* |
| 1800 | * For SIMPLE and UNTAGGED Task Attribute commands |
| 1801 | */ |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1802 | atomic_inc_mb(&dev->simple_cmds); |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1803 | break; |
| 1804 | } |
| 1805 | |
| 1806 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
| 1807 | return false; |
| 1808 | |
| 1809 | spin_lock(&dev->delayed_cmd_lock); |
| 1810 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); |
| 1811 | spin_unlock(&dev->delayed_cmd_lock); |
| 1812 | |
| 1813 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
| 1814 | " delayed CMD list, se_ordered_id: %u\n", |
| 1815 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
| 1816 | cmd->se_ordered_id); |
| 1817 | return true; |
| 1818 | } |
| 1819 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1820 | void target_execute_cmd(struct se_cmd *cmd) |
| 1821 | { |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1822 | /* |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1823 | * If the received CDB has aleady been aborted stop processing it here. |
| 1824 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1825 | if (transport_check_aborted_status(cmd, 1)) |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1826 | return; |
| 1827 | |
| 1828 | /* |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1829 | * Determine if frontend context caller is requesting the stopping of |
| 1830 | * this command for frontend exceptions. |
| 1831 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1832 | spin_lock_irq(&cmd->t_state_lock); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1833 | if (cmd->transport_state & CMD_T_STOP) { |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 1834 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08llx\n", |
| 1835 | __func__, __LINE__, cmd->tag); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1836 | |
| 1837 | spin_unlock_irq(&cmd->t_state_lock); |
Nicholas Bellinger | a95d651 | 2014-06-09 23:36:51 +0000 | [diff] [blame] | 1838 | complete_all(&cmd->t_transport_stop_comp); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1839 | return; |
| 1840 | } |
| 1841 | |
| 1842 | cmd->t_state = TRANSPORT_PROCESSING; |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1843 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1844 | spin_unlock_irq(&cmd->t_state_lock); |
Nicholas Bellinger | aa58b53 | 2015-02-08 12:39:06 -0800 | [diff] [blame] | 1845 | |
| 1846 | if (target_write_prot_action(cmd)) |
| 1847 | return; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1848 | |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1849 | if (target_handle_task_attr(cmd)) { |
| 1850 | spin_lock_irq(&cmd->t_state_lock); |
Bart Van Assche | 6c2faea | 2015-05-13 09:19:02 +0200 | [diff] [blame] | 1851 | cmd->transport_state &= ~(CMD_T_BUSY | CMD_T_SENT); |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1852 | spin_unlock_irq(&cmd->t_state_lock); |
| 1853 | return; |
| 1854 | } |
| 1855 | |
| 1856 | __target_execute_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1857 | } |
Christoph Hellwig | 70baf0a | 2012-07-08 15:58:39 -0400 | [diff] [blame] | 1858 | EXPORT_SYMBOL(target_execute_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1859 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1860 | /* |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1861 | * Process all commands up to the last received ORDERED task attribute which |
| 1862 | * requires another blocking boundary |
| 1863 | */ |
| 1864 | static void target_restart_delayed_cmds(struct se_device *dev) |
| 1865 | { |
| 1866 | for (;;) { |
| 1867 | struct se_cmd *cmd; |
| 1868 | |
| 1869 | spin_lock(&dev->delayed_cmd_lock); |
| 1870 | if (list_empty(&dev->delayed_cmd_list)) { |
| 1871 | spin_unlock(&dev->delayed_cmd_lock); |
| 1872 | break; |
| 1873 | } |
| 1874 | |
| 1875 | cmd = list_entry(dev->delayed_cmd_list.next, |
| 1876 | struct se_cmd, se_delayed_node); |
| 1877 | list_del(&cmd->se_delayed_node); |
| 1878 | spin_unlock(&dev->delayed_cmd_lock); |
| 1879 | |
| 1880 | __target_execute_cmd(cmd); |
| 1881 | |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1882 | if (cmd->sam_task_attr == TCM_ORDERED_TAG) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1883 | break; |
| 1884 | } |
| 1885 | } |
| 1886 | |
| 1887 | /* |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1888 | * Called from I/O completion to determine which dormant/delayed |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1889 | * and ordered cmds need to have their tasks added to the execution queue. |
| 1890 | */ |
| 1891 | static void transport_complete_task_attr(struct se_cmd *cmd) |
| 1892 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1893 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1894 | |
Andy Grover | a354170 | 2015-05-19 14:44:41 -0700 | [diff] [blame] | 1895 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1896 | return; |
| 1897 | |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1898 | if (cmd->sam_task_attr == TCM_SIMPLE_TAG) { |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1899 | atomic_dec_mb(&dev->simple_cmds); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1900 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1901 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1902 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
| 1903 | cmd->se_ordered_id); |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1904 | } else if (cmd->sam_task_attr == TCM_HEAD_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1905 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1906 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1907 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
| 1908 | cmd->se_ordered_id); |
Christoph Hellwig | 68d81f4 | 2014-11-24 07:07:25 -0800 | [diff] [blame] | 1909 | } else if (cmd->sam_task_attr == TCM_ORDERED_TAG) { |
Joern Engel | 33940d0 | 2014-09-16 16:23:12 -0400 | [diff] [blame] | 1910 | atomic_dec_mb(&dev->dev_ordered_sync); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1911 | |
| 1912 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1913 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1914 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
| 1915 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1916 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1917 | target_restart_delayed_cmds(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1918 | } |
| 1919 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1920 | static void transport_complete_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1921 | { |
| 1922 | int ret = 0; |
| 1923 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1924 | transport_complete_task_attr(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1925 | |
| 1926 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1927 | trace_target_cmd_complete(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1928 | ret = cmd->se_tfo->queue_status(cmd); |
Quinn Tran | 082f58a | 2014-09-25 06:22:28 -0400 | [diff] [blame] | 1929 | goto out; |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1930 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1931 | |
| 1932 | switch (cmd->data_direction) { |
| 1933 | case DMA_FROM_DEVICE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1934 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1935 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1936 | break; |
| 1937 | case DMA_TO_DEVICE: |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 1938 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1939 | ret = cmd->se_tfo->queue_data_in(cmd); |
Bart Van Assche | 63509c6 | 2015-05-13 09:17:54 +0200 | [diff] [blame] | 1940 | break; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1941 | } |
| 1942 | /* Fall through for DMA_TO_DEVICE */ |
| 1943 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1944 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1945 | ret = cmd->se_tfo->queue_status(cmd); |
| 1946 | break; |
| 1947 | default: |
| 1948 | break; |
| 1949 | } |
| 1950 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1951 | out: |
| 1952 | if (ret < 0) { |
| 1953 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 1954 | return; |
| 1955 | } |
| 1956 | transport_lun_remove_cmd(cmd); |
| 1957 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | static void transport_handle_queue_full( |
| 1961 | struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1962 | struct se_device *dev) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1963 | { |
| 1964 | spin_lock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1965 | 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] | 1966 | atomic_inc_mb(&dev->dev_qf_count); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1967 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
| 1968 | |
| 1969 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1970 | } |
| 1971 | |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1972 | static bool target_read_prot_action(struct se_cmd *cmd) |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 1973 | { |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1974 | switch (cmd->prot_op) { |
| 1975 | case TARGET_PROT_DIN_STRIP: |
| 1976 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_STRIP)) { |
Sagi Grimberg | f75b6fa | 2015-04-19 20:27:19 +0300 | [diff] [blame] | 1977 | u32 sectors = cmd->data_length >> |
| 1978 | ilog2(cmd->se_dev->dev_attrib.block_size); |
| 1979 | |
| 1980 | cmd->pi_err = sbc_dif_verify(cmd, cmd->t_task_lba, |
| 1981 | sectors, 0, cmd->t_prot_sg, |
| 1982 | 0); |
| 1983 | if (cmd->pi_err) |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1984 | return true; |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 1985 | } |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1986 | break; |
Nicholas Bellinger | 72c03850 | 2015-02-08 04:02:08 -0800 | [diff] [blame] | 1987 | case TARGET_PROT_DIN_INSERT: |
| 1988 | if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_INSERT) |
| 1989 | break; |
| 1990 | |
| 1991 | sbc_dif_generate(cmd); |
| 1992 | break; |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 1993 | default: |
| 1994 | break; |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 1995 | } |
| 1996 | |
| 1997 | return false; |
| 1998 | } |
| 1999 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 2000 | static void target_complete_ok_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2001 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 2002 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2003 | int ret; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 2004 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2005 | /* |
| 2006 | * Check if we need to move delayed/dormant tasks from cmds on the |
| 2007 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task |
| 2008 | * Attribute. |
| 2009 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 2010 | transport_complete_task_attr(cmd); |
| 2011 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2012 | /* |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2013 | * Check to schedule QUEUE_FULL work, or execute an existing |
| 2014 | * cmd->transport_qf_callback() |
| 2015 | */ |
| 2016 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) |
| 2017 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 2018 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2019 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 2020 | * Check if we need to send a sense buffer from |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2021 | * the struct se_cmd in question. |
| 2022 | */ |
| 2023 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2024 | WARN_ON(!cmd->scsi_status); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2025 | ret = transport_send_check_condition_and_sense( |
| 2026 | cmd, 0, 1); |
| 2027 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2028 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2029 | |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 2030 | transport_lun_remove_cmd(cmd); |
| 2031 | transport_cmd_check_stop_to_fabric(cmd); |
| 2032 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2033 | } |
| 2034 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2035 | * Check for a callback, used by amongst other things |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2036 | * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2037 | */ |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2038 | if (cmd->transport_complete_callback) { |
| 2039 | sense_reason_t rc; |
| 2040 | |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2041 | rc = cmd->transport_complete_callback(cmd, true); |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 2042 | if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) { |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2043 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 2044 | !cmd->data_length) |
| 2045 | goto queue_rsp; |
| 2046 | |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2047 | return; |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 2048 | } else if (rc) { |
| 2049 | ret = transport_send_check_condition_and_sense(cmd, |
| 2050 | rc, 0); |
| 2051 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2052 | goto queue_full; |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2053 | |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 2054 | transport_lun_remove_cmd(cmd); |
| 2055 | transport_cmd_check_stop_to_fabric(cmd); |
| 2056 | return; |
| 2057 | } |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 2058 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2059 | |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2060 | queue_rsp: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2061 | switch (cmd->data_direction) { |
| 2062 | case DMA_FROM_DEVICE: |
| 2063 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame^] | 2064 | cmd->se_lun->lun_stats.tx_data_octets += cmd->data_length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2065 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 2066 | /* |
| 2067 | * Perform READ_STRIP of PI using software emulation when |
| 2068 | * backend had PI enabled, if the transport will not be |
| 2069 | * performing hardware READ_STRIP offload. |
| 2070 | */ |
Nicholas Bellinger | fdeab85 | 2015-02-08 02:53:25 -0800 | [diff] [blame] | 2071 | if (target_read_prot_action(cmd)) { |
Nicholas Bellinger | bc00586 | 2014-04-02 14:55:33 -0700 | [diff] [blame] | 2072 | ret = transport_send_check_condition_and_sense(cmd, |
| 2073 | cmd->pi_err, 0); |
| 2074 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2075 | goto queue_full; |
| 2076 | |
| 2077 | transport_lun_remove_cmd(cmd); |
| 2078 | transport_cmd_check_stop_to_fabric(cmd); |
| 2079 | return; |
| 2080 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2081 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2082 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2083 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2084 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2085 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2086 | break; |
| 2087 | case DMA_TO_DEVICE: |
| 2088 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame^] | 2089 | cmd->se_lun->lun_stats.rx_data_octets += cmd->data_length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2090 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 2091 | /* |
| 2092 | * Check if we need to send READ payload for BIDI-COMMAND |
| 2093 | */ |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 2094 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2095 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame^] | 2096 | cmd->se_lun->lun_stats.tx_data_octets += cmd->data_length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2097 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2098 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2099 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2100 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2101 | break; |
| 2102 | } |
| 2103 | /* Fall through for DMA_TO_DEVICE */ |
| 2104 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2105 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2106 | ret = cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2107 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2108 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2109 | break; |
| 2110 | default: |
| 2111 | break; |
| 2112 | } |
| 2113 | |
| 2114 | transport_lun_remove_cmd(cmd); |
| 2115 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2116 | return; |
| 2117 | |
| 2118 | queue_full: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2119 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2120 | " data_direction: %d\n", cmd, cmd->data_direction); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2121 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 2122 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2123 | } |
| 2124 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2125 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2126 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2127 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2128 | int count; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2129 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2130 | for_each_sg(sgl, sg, nents, count) |
| 2131 | __free_page(sg_page(sg)); |
| 2132 | |
| 2133 | kfree(sgl); |
| 2134 | } |
| 2135 | |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2136 | static inline void transport_reset_sgl_orig(struct se_cmd *cmd) |
| 2137 | { |
| 2138 | /* |
| 2139 | * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE |
| 2140 | * emulation, and free + reset pointers if necessary.. |
| 2141 | */ |
| 2142 | if (!cmd->t_data_sg_orig) |
| 2143 | return; |
| 2144 | |
| 2145 | kfree(cmd->t_data_sg); |
| 2146 | cmd->t_data_sg = cmd->t_data_sg_orig; |
| 2147 | cmd->t_data_sg_orig = NULL; |
| 2148 | cmd->t_data_nents = cmd->t_data_nents_orig; |
| 2149 | cmd->t_data_nents_orig = 0; |
| 2150 | } |
| 2151 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2152 | static inline void transport_free_pages(struct se_cmd *cmd) |
| 2153 | { |
Akinobu Mita | 5835812 | 2015-05-01 15:23:49 +0900 | [diff] [blame] | 2154 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC)) { |
| 2155 | transport_free_sgl(cmd->t_prot_sg, cmd->t_prot_nents); |
| 2156 | cmd->t_prot_sg = NULL; |
| 2157 | cmd->t_prot_nents = 0; |
| 2158 | } |
| 2159 | |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2160 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2161 | /* |
| 2162 | * Release special case READ buffer payload required for |
| 2163 | * SG_TO_MEM_NOALLOC to function with COMPARE_AND_WRITE |
| 2164 | */ |
| 2165 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) { |
| 2166 | transport_free_sgl(cmd->t_bidi_data_sg, |
| 2167 | cmd->t_bidi_data_nents); |
| 2168 | cmd->t_bidi_data_sg = NULL; |
| 2169 | cmd->t_bidi_data_nents = 0; |
| 2170 | } |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2171 | transport_reset_sgl_orig(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2172 | return; |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2173 | } |
| 2174 | transport_reset_sgl_orig(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2175 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2176 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2177 | cmd->t_data_sg = NULL; |
| 2178 | cmd->t_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2179 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2180 | 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] | 2181 | cmd->t_bidi_data_sg = NULL; |
| 2182 | cmd->t_bidi_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2183 | } |
| 2184 | |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2185 | /** |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2186 | * transport_release_cmd - free a command |
| 2187 | * @cmd: command to free |
| 2188 | * |
| 2189 | * This routine unconditionally frees a command, and reference counting |
| 2190 | * or list removal must be done in the caller. |
| 2191 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2192 | static int transport_release_cmd(struct se_cmd *cmd) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2193 | { |
| 2194 | BUG_ON(!cmd->se_tfo); |
| 2195 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2196 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2197 | core_tmr_release_req(cmd->se_tmr_req); |
| 2198 | if (cmd->t_task_cdb != cmd->__t_task_cdb) |
| 2199 | kfree(cmd->t_task_cdb); |
| 2200 | /* |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2201 | * If this cmd has been setup with target_get_sess_cmd(), drop |
| 2202 | * the kref and call ->release_cmd() in kref callback. |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2203 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2204 | return target_put_sess_cmd(cmd); |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2205 | } |
| 2206 | |
| 2207 | /** |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2208 | * transport_put_cmd - release a reference to a command |
| 2209 | * @cmd: command to release |
| 2210 | * |
| 2211 | * This routine releases our reference to the command and frees it if possible. |
| 2212 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2213 | static int transport_put_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2214 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2215 | transport_free_pages(cmd); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2216 | return transport_release_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2217 | } |
| 2218 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2219 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2220 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2221 | struct scatterlist *sg = cmd->t_data_sg; |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2222 | struct page **pages; |
| 2223 | int i; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2224 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2225 | /* |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2226 | * We need to take into account a possible offset here for fabrics like |
| 2227 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for |
| 2228 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2229 | */ |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2230 | if (!cmd->t_data_nents) |
| 2231 | return NULL; |
Paolo Bonzini | 3717ef0 | 2012-09-07 17:30:35 +0200 | [diff] [blame] | 2232 | |
| 2233 | BUG_ON(!sg); |
| 2234 | if (cmd->t_data_nents == 1) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2235 | return kmap(sg_page(sg)) + sg->offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2236 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2237 | /* >1 page. use vmap */ |
| 2238 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2239 | if (!pages) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2240 | return NULL; |
| 2241 | |
| 2242 | /* convert sg[] to pages[] */ |
| 2243 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { |
| 2244 | pages[i] = sg_page(sg); |
| 2245 | } |
| 2246 | |
| 2247 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); |
| 2248 | kfree(pages); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2249 | if (!cmd->t_data_vmap) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2250 | return NULL; |
| 2251 | |
| 2252 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; |
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 | EXPORT_SYMBOL(transport_kmap_data_sg); |
| 2255 | |
| 2256 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
| 2257 | { |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2258 | if (!cmd->t_data_nents) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2259 | return; |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2260 | } else if (cmd->t_data_nents == 1) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2261 | kunmap(sg_page(cmd->t_data_sg)); |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2262 | return; |
| 2263 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2264 | |
| 2265 | vunmap(cmd->t_data_vmap); |
| 2266 | cmd->t_data_vmap = NULL; |
| 2267 | } |
| 2268 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2269 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 2270 | int |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2271 | target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, |
| 2272 | bool zero_page) |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2273 | { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2274 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2275 | struct page *page; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2276 | gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; |
| 2277 | unsigned int nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2278 | int i = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2279 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2280 | nent = DIV_ROUND_UP(length, PAGE_SIZE); |
| 2281 | sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL); |
| 2282 | if (!sg) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2283 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2284 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2285 | sg_init_table(sg, nent); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2286 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2287 | while (length) { |
| 2288 | u32 page_len = min_t(u32, length, PAGE_SIZE); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2289 | page = alloc_page(GFP_KERNEL | zero_flag); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2290 | if (!page) |
| 2291 | goto out; |
| 2292 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2293 | sg_set_page(&sg[i], page, page_len, 0); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2294 | length -= page_len; |
| 2295 | i++; |
| 2296 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2297 | *sgl = sg; |
| 2298 | *nents = nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2299 | return 0; |
| 2300 | |
| 2301 | out: |
Yi Zou | d0e27c8 | 2012-08-14 16:06:43 -0700 | [diff] [blame] | 2302 | while (i > 0) { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2303 | i--; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2304 | __free_page(sg_page(&sg[i])); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2305 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2306 | kfree(sg); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2307 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2308 | } |
| 2309 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2310 | /* |
Andy Grover | b16a35b | 2012-04-03 15:51:21 -0700 | [diff] [blame] | 2311 | * Allocate any required resources to execute the command. For writes we |
| 2312 | * might not have the payload yet, so notify the fabric via a call to |
| 2313 | * ->write_pending instead. Otherwise place it on the execution queue. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2314 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2315 | sense_reason_t |
| 2316 | transport_generic_new_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2317 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2318 | int ret = 0; |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2319 | bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2320 | |
Akinobu Mita | 5835812 | 2015-05-01 15:23:49 +0900 | [diff] [blame] | 2321 | if (cmd->prot_op != TARGET_PROT_NORMAL && |
| 2322 | !(cmd->se_cmd_flags & SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC)) { |
| 2323 | ret = target_alloc_sgl(&cmd->t_prot_sg, &cmd->t_prot_nents, |
| 2324 | cmd->prot_length, true); |
| 2325 | if (ret < 0) |
| 2326 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 2327 | } |
| 2328 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2329 | /* |
| 2330 | * Determine is the TCM fabric module has already allocated physical |
| 2331 | * memory, and is directly calling transport_generic_map_mem_to_cmd() |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2332 | * beforehand. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2333 | */ |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2334 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
| 2335 | cmd->data_length) { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2336 | |
Nicholas Bellinger | 8cefe07 | 2013-08-25 16:10:57 -0700 | [diff] [blame] | 2337 | if ((cmd->se_cmd_flags & SCF_BIDI) || |
| 2338 | (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) { |
| 2339 | u32 bidi_length; |
| 2340 | |
| 2341 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) |
| 2342 | bidi_length = cmd->t_task_nolb * |
| 2343 | cmd->se_dev->dev_attrib.block_size; |
| 2344 | else |
| 2345 | bidi_length = cmd->data_length; |
| 2346 | |
| 2347 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, |
| 2348 | &cmd->t_bidi_data_nents, |
| 2349 | bidi_length, zero_flag); |
| 2350 | if (ret < 0) |
| 2351 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 2352 | } |
| 2353 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2354 | ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
| 2355 | cmd->data_length, zero_flag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2356 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2357 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c8e6398 | 2015-04-07 21:53:27 +0000 | [diff] [blame] | 2358 | } else if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 2359 | cmd->data_length) { |
| 2360 | /* |
| 2361 | * Special case for COMPARE_AND_WRITE with fabrics |
| 2362 | * using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC. |
| 2363 | */ |
| 2364 | u32 caw_length = cmd->t_task_nolb * |
| 2365 | cmd->se_dev->dev_attrib.block_size; |
| 2366 | |
| 2367 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, |
| 2368 | &cmd->t_bidi_data_nents, |
| 2369 | caw_length, zero_flag); |
| 2370 | if (ret < 0) |
| 2371 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2372 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2373 | /* |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2374 | * If this command is not a write we can execute it right here, |
| 2375 | * for write buffers we need to notify the fabric driver first |
| 2376 | * and let it call back once the write buffers are ready. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2377 | */ |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 2378 | target_add_to_state_list(cmd); |
Roland Dreier | 885e7b0 | 2014-10-14 14:16:24 -0700 | [diff] [blame] | 2379 | if (cmd->data_direction != DMA_TO_DEVICE || cmd->data_length == 0) { |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2380 | target_execute_cmd(cmd); |
| 2381 | return 0; |
| 2382 | } |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 2383 | transport_cmd_check_stop(cmd, false, true); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2384 | |
| 2385 | ret = cmd->se_tfo->write_pending(cmd); |
| 2386 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2387 | goto queue_full; |
| 2388 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2389 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
| 2390 | WARN_ON(ret); |
Christoph Hellwig | da0f761 | 2011-10-18 06:57:01 -0400 | [diff] [blame] | 2391 | |
Nicholas Bellinger | b69c1fc | 2012-11-06 15:43:53 -0800 | [diff] [blame] | 2392 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2393 | |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2394 | queue_full: |
| 2395 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
| 2396 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
| 2397 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2398 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2399 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2400 | EXPORT_SYMBOL(transport_generic_new_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2401 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2402 | static void transport_write_pending_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2403 | { |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2404 | int ret; |
| 2405 | |
| 2406 | ret = cmd->se_tfo->write_pending(cmd); |
| 2407 | if (ret == -EAGAIN || ret == -ENOMEM) { |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2408 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
| 2409 | cmd); |
| 2410 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2411 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2412 | } |
| 2413 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2414 | 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] | 2415 | { |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2416 | unsigned long flags; |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2417 | int ret = 0; |
| 2418 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2419 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2420 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2421 | transport_wait_for_tasks(cmd); |
| 2422 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2423 | ret = transport_release_cmd(cmd); |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2424 | } else { |
| 2425 | if (wait_for_tasks) |
| 2426 | transport_wait_for_tasks(cmd); |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2427 | /* |
| 2428 | * Handle WRITE failure case where transport_generic_new_cmd() |
| 2429 | * has already added se_cmd to state_list, but fabric has |
| 2430 | * failed command before I/O submission. |
| 2431 | */ |
| 2432 | if (cmd->state_active) { |
| 2433 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 2434 | target_remove_from_state_list(cmd); |
| 2435 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2436 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2437 | |
Christoph Hellwig | 82f1c8a | 2011-09-13 23:09:01 +0200 | [diff] [blame] | 2438 | if (cmd->se_lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2439 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2440 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2441 | ret = transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2442 | } |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2443 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2444 | } |
| 2445 | EXPORT_SYMBOL(transport_generic_free_cmd); |
| 2446 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2447 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2448 | * @se_cmd: command descriptor to add |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2449 | * @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] | 2450 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2451 | 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] | 2452 | { |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2453 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2454 | unsigned long flags; |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2455 | int ret = 0; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2456 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2457 | /* |
| 2458 | * Add a second kref if the fabric caller is expecting to handle |
| 2459 | * fabric acknowledgement that requires two target_put_sess_cmd() |
| 2460 | * invocations before se_cmd descriptor release. |
| 2461 | */ |
Bart Van Assche | 054922b | 2015-04-10 14:49:44 +0200 | [diff] [blame] | 2462 | if (ack_kref) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2463 | kref_get(&se_cmd->cmd_kref); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2464 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2465 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2466 | if (se_sess->sess_tearing_down) { |
| 2467 | ret = -ESHUTDOWN; |
| 2468 | goto out; |
| 2469 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2470 | 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] | 2471 | out: |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2472 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
Bart Van Assche | 7544e597 | 2015-02-18 15:33:58 +0100 | [diff] [blame] | 2473 | |
| 2474 | if (ret && ack_kref) |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2475 | target_put_sess_cmd(se_cmd); |
Bart Van Assche | 7544e597 | 2015-02-18 15:33:58 +0100 | [diff] [blame] | 2476 | |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2477 | return ret; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2478 | } |
Nicholas Bellinger | 20361e6 | 2013-03-21 22:54:28 -0700 | [diff] [blame] | 2479 | EXPORT_SYMBOL(target_get_sess_cmd); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2480 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2481 | static void target_release_cmd_kref(struct kref *kref) |
Christoph Hellwig | 077aa3b | 2015-03-26 12:27:34 +0100 | [diff] [blame] | 2482 | __releases(&se_cmd->se_sess->sess_cmd_lock) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2483 | { |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2484 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
| 2485 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2486 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2487 | if (list_empty(&se_cmd->se_cmd_list)) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2488 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | ffc32d5 | 2012-02-13 02:35:01 -0800 | [diff] [blame] | 2489 | se_cmd->se_tfo->release_cmd(se_cmd); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2490 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2491 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2492 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2493 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2494 | complete(&se_cmd->cmd_wait_comp); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2495 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2496 | } |
| 2497 | list_del(&se_cmd->se_cmd_list); |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2498 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2499 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2500 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2501 | } |
| 2502 | |
| 2503 | /* 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] | 2504 | * @se_cmd: command descriptor to drop |
| 2505 | */ |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2506 | int target_put_sess_cmd(struct se_cmd *se_cmd) |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2507 | { |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 2508 | struct se_session *se_sess = se_cmd->se_sess; |
| 2509 | |
Nicholas Bellinger | 0ed6e18 | 2014-06-12 12:45:02 -0700 | [diff] [blame] | 2510 | if (!se_sess) { |
| 2511 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2512 | return 1; |
| 2513 | } |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2514 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
| 2515 | &se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2516 | } |
| 2517 | EXPORT_SYMBOL(target_put_sess_cmd); |
| 2518 | |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2519 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
| 2520 | * sess_cmd_list to complete cmd_wait_comp. Set |
| 2521 | * sess_tearing_down so no more commands are queued. |
| 2522 | * @se_sess: session to flag |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2523 | */ |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2524 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2525 | { |
| 2526 | struct se_cmd *se_cmd; |
| 2527 | unsigned long flags; |
| 2528 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2529 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2530 | if (se_sess->sess_tearing_down) { |
| 2531 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2532 | return; |
| 2533 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2534 | se_sess->sess_tearing_down = 1; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2535 | 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] | 2536 | |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2537 | 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] | 2538 | se_cmd->cmd_wait_set = 1; |
| 2539 | |
| 2540 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2541 | } |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2542 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2543 | |
| 2544 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors |
| 2545 | * @se_sess: session to wait for active I/O |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2546 | */ |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2547 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2548 | { |
| 2549 | struct se_cmd *se_cmd, *tmp_cmd; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2550 | unsigned long flags; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2551 | |
| 2552 | list_for_each_entry_safe(se_cmd, tmp_cmd, |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2553 | &se_sess->sess_wait_list, se_cmd_list) { |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2554 | list_del(&se_cmd->se_cmd_list); |
| 2555 | |
| 2556 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" |
| 2557 | " %d\n", se_cmd, se_cmd->t_state, |
| 2558 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2559 | |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2560 | wait_for_completion(&se_cmd->cmd_wait_comp); |
| 2561 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" |
| 2562 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2563 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2564 | |
| 2565 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2566 | } |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2567 | |
| 2568 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
| 2569 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); |
| 2570 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2571 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2572 | } |
| 2573 | EXPORT_SYMBOL(target_wait_for_sess_cmds); |
| 2574 | |
Bart Van Assche | b3eeea6 | 2015-05-19 16:16:01 +0200 | [diff] [blame] | 2575 | void transport_clear_lun_ref(struct se_lun *lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2576 | { |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2577 | percpu_ref_kill(&lun->lun_ref); |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2578 | wait_for_completion(&lun->lun_ref_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2579 | } |
| 2580 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2581 | /** |
| 2582 | * transport_wait_for_tasks - wait for completion to occur |
| 2583 | * @cmd: command to wait |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2584 | * |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2585 | * Called from frontend fabric context to wait for storage engine |
| 2586 | * to pause and/or release frontend generated struct se_cmd. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2587 | */ |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2588 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2589 | { |
| 2590 | unsigned long flags; |
| 2591 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2592 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2593 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
| 2594 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2595 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2596 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2597 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 2598 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2599 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
| 2600 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2601 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2602 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2603 | } |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2604 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2605 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2606 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2607 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2608 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2609 | |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2610 | cmd->transport_state |= CMD_T_STOP; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2611 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2612 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08llx i_state: %d, t_state: %d, CMD_T_STOP\n", |
| 2613 | 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] | 2614 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2615 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2616 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2617 | wait_for_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2618 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2619 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2620 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2621 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2622 | pr_debug("wait_for_tasks: Stopped wait_for_completion(&cmd->t_transport_stop_comp) for ITT: 0x%08llx\n", |
| 2623 | cmd->tag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2624 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2625 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2626 | |
| 2627 | return true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2628 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2629 | EXPORT_SYMBOL(transport_wait_for_tasks); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2630 | |
| 2631 | static int transport_get_sense_codes( |
| 2632 | struct se_cmd *cmd, |
| 2633 | u8 *asc, |
| 2634 | u8 *ascq) |
| 2635 | { |
| 2636 | *asc = cmd->scsi_asc; |
| 2637 | *ascq = cmd->scsi_ascq; |
| 2638 | |
| 2639 | return 0; |
| 2640 | } |
| 2641 | |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2642 | static |
| 2643 | void transport_err_sector_info(unsigned char *buffer, sector_t bad_sector) |
| 2644 | { |
| 2645 | /* Place failed LBA in sense data information descriptor 0. */ |
| 2646 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 0xc; |
| 2647 | buffer[SPC_DESC_TYPE_OFFSET] = 0; /* Information */ |
| 2648 | buffer[SPC_ADDITIONAL_DESC_LEN_OFFSET] = 0xa; |
| 2649 | buffer[SPC_VALIDITY_OFFSET] = 0x80; |
| 2650 | |
| 2651 | /* Descriptor Information: failing sector */ |
| 2652 | put_unaligned_be64(bad_sector, &buffer[12]); |
| 2653 | } |
| 2654 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2655 | int |
| 2656 | transport_send_check_condition_and_sense(struct se_cmd *cmd, |
| 2657 | sense_reason_t reason, int from_transport) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2658 | { |
| 2659 | unsigned char *buffer = cmd->sense_buffer; |
| 2660 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2661 | u8 asc = 0, ascq = 0; |
| 2662 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2663 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2664 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2665 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2666 | return 0; |
| 2667 | } |
| 2668 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2669 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2670 | |
| 2671 | if (!reason && from_transport) |
| 2672 | goto after_reason; |
| 2673 | |
| 2674 | if (!from_transport) |
| 2675 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2676 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2677 | /* |
| 2678 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses |
| 2679 | * SENSE KEY values from include/scsi/scsi.h |
| 2680 | */ |
| 2681 | switch (reason) { |
Hannes Reinecke | ba82913 | 2012-12-17 09:53:33 +0100 | [diff] [blame] | 2682 | case TCM_NO_SENSE: |
| 2683 | /* CURRENT ERROR */ |
| 2684 | buffer[0] = 0x70; |
| 2685 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2686 | /* Not Ready */ |
| 2687 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
| 2688 | /* NO ADDITIONAL SENSE INFORMATION */ |
| 2689 | buffer[SPC_ASC_KEY_OFFSET] = 0; |
| 2690 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; |
| 2691 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2692 | case TCM_NON_EXISTENT_LUN: |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2693 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2694 | buffer[0] = 0x70; |
| 2695 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2696 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2697 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2698 | /* LOGICAL UNIT NOT SUPPORTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2699 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2700 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2701 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 2702 | case TCM_SECTOR_COUNT_TOO_MANY: |
| 2703 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2704 | buffer[0] = 0x70; |
| 2705 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2706 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2707 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2708 | /* INVALID COMMAND OPERATION CODE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2709 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2710 | break; |
| 2711 | case TCM_UNKNOWN_MODE_PAGE: |
| 2712 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2713 | buffer[0] = 0x70; |
| 2714 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2715 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2716 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2717 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2718 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2719 | break; |
| 2720 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 2721 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2722 | buffer[0] = 0x70; |
| 2723 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2724 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2725 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2726 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2727 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
| 2728 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2729 | break; |
| 2730 | case TCM_INCORRECT_AMOUNT_OF_DATA: |
| 2731 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2732 | buffer[0] = 0x70; |
| 2733 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2734 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2735 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2736 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2737 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2738 | /* NOT ENOUGH UNSOLICITED DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2739 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2740 | break; |
| 2741 | case TCM_INVALID_CDB_FIELD: |
| 2742 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2743 | buffer[0] = 0x70; |
| 2744 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2745 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2746 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2747 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2748 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2749 | break; |
| 2750 | case TCM_INVALID_PARAMETER_LIST: |
| 2751 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2752 | buffer[0] = 0x70; |
| 2753 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2754 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2755 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2756 | /* INVALID FIELD IN PARAMETER LIST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2757 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2758 | break; |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 2759 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
| 2760 | /* CURRENT ERROR */ |
| 2761 | buffer[0] = 0x70; |
| 2762 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2763 | /* ILLEGAL REQUEST */ |
| 2764 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2765 | /* PARAMETER LIST LENGTH ERROR */ |
| 2766 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; |
| 2767 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2768 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
| 2769 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2770 | buffer[0] = 0x70; |
| 2771 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2772 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2773 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2774 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2775 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2776 | /* UNEXPECTED_UNSOLICITED_DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2777 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2778 | break; |
| 2779 | case TCM_SERVICE_CRC_ERROR: |
| 2780 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2781 | buffer[0] = 0x70; |
| 2782 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2783 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2784 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2785 | /* PROTOCOL SERVICE CRC ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2786 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2787 | /* N/A */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2788 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2789 | break; |
| 2790 | case TCM_SNACK_REJECTED: |
| 2791 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2792 | buffer[0] = 0x70; |
| 2793 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2794 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2795 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2796 | /* READ ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2797 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2798 | /* FAILED RETRANSMISSION REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2799 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2800 | break; |
| 2801 | case TCM_WRITE_PROTECTED: |
| 2802 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2803 | buffer[0] = 0x70; |
| 2804 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2805 | /* DATA PROTECT */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2806 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2807 | /* WRITE PROTECTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2808 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2809 | break; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2810 | case TCM_ADDRESS_OUT_OF_RANGE: |
| 2811 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2812 | buffer[0] = 0x70; |
| 2813 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2814 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2815 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2816 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2817 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2818 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2819 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 2820 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2821 | buffer[0] = 0x70; |
| 2822 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2823 | /* UNIT ATTENTION */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2824 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2825 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2826 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2827 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2828 | break; |
| 2829 | case TCM_CHECK_CONDITION_NOT_READY: |
| 2830 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2831 | buffer[0] = 0x70; |
| 2832 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2833 | /* Not Ready */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2834 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2835 | transport_get_sense_codes(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2836 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2837 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2838 | break; |
Nicholas Bellinger | 818b571 | 2013-08-19 15:10:38 -0700 | [diff] [blame] | 2839 | case TCM_MISCOMPARE_VERIFY: |
| 2840 | /* CURRENT ERROR */ |
| 2841 | buffer[0] = 0x70; |
| 2842 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2843 | buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE; |
| 2844 | /* MISCOMPARE DURING VERIFY OPERATION */ |
| 2845 | buffer[SPC_ASC_KEY_OFFSET] = 0x1d; |
| 2846 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x00; |
| 2847 | break; |
Nicholas Bellinger | fcc4f17b | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2848 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
| 2849 | /* CURRENT ERROR */ |
| 2850 | buffer[0] = 0x70; |
| 2851 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2852 | /* ILLEGAL REQUEST */ |
| 2853 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2854 | /* LOGICAL BLOCK GUARD CHECK FAILED */ |
| 2855 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2856 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x01; |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2857 | transport_err_sector_info(buffer, cmd->bad_sector); |
Nicholas Bellinger | fcc4f17b | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2858 | break; |
| 2859 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: |
| 2860 | /* CURRENT ERROR */ |
| 2861 | buffer[0] = 0x70; |
| 2862 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2863 | /* ILLEGAL REQUEST */ |
| 2864 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2865 | /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */ |
| 2866 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2867 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x02; |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2868 | transport_err_sector_info(buffer, cmd->bad_sector); |
Nicholas Bellinger | fcc4f17b | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2869 | break; |
| 2870 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: |
| 2871 | /* CURRENT ERROR */ |
| 2872 | buffer[0] = 0x70; |
| 2873 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2874 | /* ILLEGAL REQUEST */ |
| 2875 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2876 | /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */ |
| 2877 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2878 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Sagi Grimberg | 76736db | 2014-01-23 19:29:38 +0200 | [diff] [blame] | 2879 | transport_err_sector_info(buffer, cmd->bad_sector); |
Nicholas Bellinger | fcc4f17b | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2880 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2881 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 2882 | default: |
| 2883 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2884 | buffer[0] = 0x70; |
| 2885 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Jörn Engel | ad67328 | 2013-03-18 18:30:31 -0400 | [diff] [blame] | 2886 | /* |
| 2887 | * Returning ILLEGAL REQUEST would cause immediate IO errors on |
| 2888 | * Solaris initiators. Returning NOT READY instead means the |
| 2889 | * operations will be retried a finite number of times and we |
| 2890 | * can survive intermittent errors. |
| 2891 | */ |
| 2892 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2893 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
Hannes Reinecke | 18a9df4 | 2012-12-17 09:53:32 +0100 | [diff] [blame] | 2894 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2895 | break; |
| 2896 | } |
| 2897 | /* |
| 2898 | * This code uses linux/include/scsi/scsi.h SAM status codes! |
| 2899 | */ |
| 2900 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; |
| 2901 | /* |
| 2902 | * Automatically padded, this value is encoded in the fabric's |
| 2903 | * data_length response PDU containing the SCSI defined sense data. |
| 2904 | */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2905 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2906 | |
| 2907 | after_reason: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2908 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2909 | return cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2910 | } |
| 2911 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); |
| 2912 | |
| 2913 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) |
| 2914 | { |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2915 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
| 2916 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2917 | |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2918 | /* |
| 2919 | * If cmd has been aborted but either no status is to be sent or it has |
| 2920 | * already been sent, just return |
| 2921 | */ |
| 2922 | if (!send_status || !(cmd->se_cmd_flags & SCF_SEND_DELAYED_TAS)) |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2923 | return 1; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2924 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2925 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08llx\n", |
| 2926 | cmd->t_task_cdb[0], cmd->tag); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2927 | |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2928 | cmd->se_cmd_flags &= ~SCF_SEND_DELAYED_TAS; |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2929 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2930 | trace_target_cmd_complete(cmd); |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2931 | cmd->se_tfo->queue_status(cmd); |
| 2932 | |
| 2933 | return 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2934 | } |
| 2935 | EXPORT_SYMBOL(transport_check_aborted_status); |
| 2936 | |
| 2937 | void transport_send_task_abort(struct se_cmd *cmd) |
| 2938 | { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2939 | unsigned long flags; |
| 2940 | |
| 2941 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2942 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION)) { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2943 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2944 | return; |
| 2945 | } |
| 2946 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2947 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2948 | /* |
| 2949 | * If there are still expected incoming fabric WRITEs, we wait |
| 2950 | * until until they have completed before sending a TASK_ABORTED |
| 2951 | * response. This response with TASK_ABORTED status will be |
| 2952 | * queued back to fabric module by transport_check_aborted_status(). |
| 2953 | */ |
| 2954 | if (cmd->data_direction == DMA_TO_DEVICE) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2955 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2956 | cmd->transport_state |= CMD_T_ABORTED; |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 2957 | cmd->se_cmd_flags |= SCF_SEND_DELAYED_TAS; |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2958 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2959 | } |
| 2960 | } |
| 2961 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2962 | |
Roland Dreier | 72b59d6e | 2013-01-02 12:47:58 -0800 | [diff] [blame] | 2963 | transport_lun_remove_cmd(cmd); |
| 2964 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 2965 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x, ITT: 0x%08llx\n", |
| 2966 | cmd->t_task_cdb[0], cmd->tag); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2967 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2968 | trace_target_cmd_complete(cmd); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2969 | cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2970 | } |
| 2971 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2972 | static void target_tmr_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2973 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2974 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2975 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2976 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
| 2977 | int ret; |
| 2978 | |
| 2979 | switch (tmr->function) { |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2980 | case TMR_ABORT_TASK: |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2981 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2982 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2983 | case TMR_ABORT_TASK_SET: |
| 2984 | case TMR_CLEAR_ACA: |
| 2985 | case TMR_CLEAR_TASK_SET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2986 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
| 2987 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2988 | case TMR_LUN_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2989 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
| 2990 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : |
| 2991 | TMR_FUNCTION_REJECTED; |
| 2992 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2993 | case TMR_TARGET_WARM_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2994 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2995 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2996 | case TMR_TARGET_COLD_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2997 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2998 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2999 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3000 | pr_err("Uknown TMR function: 0x%02x.\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3001 | tmr->function); |
| 3002 | tmr->response = TMR_FUNCTION_REJECTED; |
| 3003 | break; |
| 3004 | } |
| 3005 | |
| 3006 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3007 | cmd->se_tfo->queue_tm_rsp(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3008 | |
Christoph Hellwig | b7b8bef | 2011-10-17 13:56:44 -0400 | [diff] [blame] | 3009 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3010 | } |
| 3011 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3012 | int transport_generic_handle_tmr( |
| 3013 | struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3014 | { |
Nicholas Bellinger | f15e9cd | 2014-06-09 23:13:20 +0000 | [diff] [blame] | 3015 | unsigned long flags; |
| 3016 | |
| 3017 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 3018 | cmd->transport_state |= CMD_T_ACTIVE; |
| 3019 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 3020 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3021 | INIT_WORK(&cmd->work, target_tmr_work); |
| 3022 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3023 | return 0; |
| 3024 | } |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 3025 | EXPORT_SYMBOL(transport_generic_handle_tmr); |
Christoph Hellwig | 814e5b4 | 2015-04-20 15:00:30 +0200 | [diff] [blame] | 3026 | |
| 3027 | bool |
| 3028 | target_check_wce(struct se_device *dev) |
| 3029 | { |
| 3030 | bool wce = false; |
| 3031 | |
| 3032 | if (dev->transport->get_write_cache) |
| 3033 | wce = dev->transport->get_write_cache(dev); |
| 3034 | else if (dev->dev_attrib.emulate_write_cache > 0) |
| 3035 | wce = true; |
| 3036 | |
| 3037 | return wce; |
| 3038 | } |
| 3039 | |
| 3040 | bool |
| 3041 | target_check_fua(struct se_device *dev) |
| 3042 | { |
| 3043 | return target_check_wce(dev) && dev->dev_attrib.emulate_fua_write > 0; |
| 3044 | } |