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 | #include <target/target_core_configfs.h> |
| 48 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 49 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 50 | #include "target_core_alua.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 51 | #include "target_core_pr.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 52 | #include "target_core_ua.h" |
| 53 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 54 | #define CREATE_TRACE_POINTS |
| 55 | #include <trace/events/target.h> |
| 56 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 57 | static struct workqueue_struct *target_completion_wq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 58 | static struct kmem_cache *se_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 59 | struct kmem_cache *se_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | struct kmem_cache *t10_pr_reg_cache; |
| 61 | struct kmem_cache *t10_alua_lu_gp_cache; |
| 62 | struct kmem_cache *t10_alua_lu_gp_mem_cache; |
| 63 | struct kmem_cache *t10_alua_tg_pt_gp_cache; |
| 64 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; |
| 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 | } |
| 121 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( |
| 122 | "t10_alua_tg_pt_gp_mem_cache", |
| 123 | sizeof(struct t10_alua_tg_pt_gp_member), |
| 124 | __alignof__(struct t10_alua_tg_pt_gp_member), |
| 125 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 126 | if (!t10_alua_tg_pt_gp_mem_cache) { |
| 127 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 128 | "mem_t failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 129 | goto out_free_tg_pt_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 130 | } |
| 131 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 132 | target_completion_wq = alloc_workqueue("target_completion", |
| 133 | WQ_MEM_RECLAIM, 0); |
| 134 | if (!target_completion_wq) |
| 135 | goto out_free_tg_pt_gp_mem_cache; |
| 136 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | return 0; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 138 | |
| 139 | out_free_tg_pt_gp_mem_cache: |
| 140 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
| 141 | out_free_tg_pt_gp_cache: |
| 142 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 143 | out_free_lu_gp_mem_cache: |
| 144 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 145 | out_free_lu_gp_cache: |
| 146 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 147 | out_free_pr_reg_cache: |
| 148 | kmem_cache_destroy(t10_pr_reg_cache); |
| 149 | out_free_ua_cache: |
| 150 | kmem_cache_destroy(se_ua_cache); |
| 151 | out_free_sess_cache: |
| 152 | kmem_cache_destroy(se_sess_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 153 | out: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 154 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 155 | } |
| 156 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 157 | void release_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 158 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 159 | destroy_workqueue(target_completion_wq); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 160 | kmem_cache_destroy(se_sess_cache); |
| 161 | kmem_cache_destroy(se_ua_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 162 | kmem_cache_destroy(t10_pr_reg_cache); |
| 163 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 164 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 165 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 166 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 167 | } |
| 168 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 169 | /* This code ensures unique mib indexes are handed out. */ |
| 170 | static DEFINE_SPINLOCK(scsi_mib_index_lock); |
| 171 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 172 | |
| 173 | /* |
| 174 | * Allocate a new row index for the entry type specified |
| 175 | */ |
| 176 | u32 scsi_get_new_index(scsi_index_t type) |
| 177 | { |
| 178 | u32 new_index; |
| 179 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 180 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 181 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 182 | spin_lock(&scsi_mib_index_lock); |
| 183 | new_index = ++scsi_mib_index[type]; |
| 184 | spin_unlock(&scsi_mib_index_lock); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 185 | |
| 186 | return new_index; |
| 187 | } |
| 188 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 189 | void transport_subsystem_check_init(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 190 | { |
| 191 | int ret; |
Andy Grover | 283669d | 2012-07-30 15:54:17 -0700 | [diff] [blame] | 192 | static int sub_api_initialized; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 193 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 194 | if (sub_api_initialized) |
| 195 | return; |
| 196 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 197 | ret = request_module("target_core_iblock"); |
| 198 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 199 | pr_err("Unable to load target_core_iblock\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 200 | |
| 201 | ret = request_module("target_core_file"); |
| 202 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 203 | pr_err("Unable to load target_core_file\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 204 | |
| 205 | ret = request_module("target_core_pscsi"); |
| 206 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 207 | pr_err("Unable to load target_core_pscsi\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 208 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 209 | sub_api_initialized = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | struct se_session *transport_init_session(void) |
| 213 | { |
| 214 | struct se_session *se_sess; |
| 215 | |
| 216 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 217 | if (!se_sess) { |
| 218 | pr_err("Unable to allocate struct se_session from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 219 | " se_sess_cache\n"); |
| 220 | return ERR_PTR(-ENOMEM); |
| 221 | } |
| 222 | INIT_LIST_HEAD(&se_sess->sess_list); |
| 223 | INIT_LIST_HEAD(&se_sess->sess_acl_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 224 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 225 | INIT_LIST_HEAD(&se_sess->sess_wait_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 226 | spin_lock_init(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 227 | kref_init(&se_sess->sess_kref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 228 | |
| 229 | return se_sess; |
| 230 | } |
| 231 | EXPORT_SYMBOL(transport_init_session); |
| 232 | |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 233 | int transport_alloc_session_tags(struct se_session *se_sess, |
| 234 | unsigned int tag_num, unsigned int tag_size) |
| 235 | { |
| 236 | int rc; |
| 237 | |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 238 | se_sess->sess_cmd_map = kzalloc(tag_num * tag_size, |
| 239 | GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 240 | if (!se_sess->sess_cmd_map) { |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 241 | se_sess->sess_cmd_map = vzalloc(tag_num * tag_size); |
| 242 | if (!se_sess->sess_cmd_map) { |
| 243 | pr_err("Unable to allocate se_sess->sess_cmd_map\n"); |
| 244 | return -ENOMEM; |
| 245 | } |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); |
| 249 | if (rc < 0) { |
| 250 | pr_err("Unable to init se_sess->sess_tag_pool," |
| 251 | " tag_num: %u\n", tag_num); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 252 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 253 | vfree(se_sess->sess_cmd_map); |
| 254 | else |
| 255 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 256 | se_sess->sess_cmd_map = NULL; |
| 257 | return -ENOMEM; |
| 258 | } |
| 259 | |
| 260 | return 0; |
| 261 | } |
| 262 | EXPORT_SYMBOL(transport_alloc_session_tags); |
| 263 | |
| 264 | struct se_session *transport_init_session_tags(unsigned int tag_num, |
| 265 | unsigned int tag_size) |
| 266 | { |
| 267 | struct se_session *se_sess; |
| 268 | int rc; |
| 269 | |
| 270 | se_sess = transport_init_session(); |
| 271 | if (IS_ERR(se_sess)) |
| 272 | return se_sess; |
| 273 | |
| 274 | rc = transport_alloc_session_tags(se_sess, tag_num, tag_size); |
| 275 | if (rc < 0) { |
| 276 | transport_free_session(se_sess); |
| 277 | return ERR_PTR(-ENOMEM); |
| 278 | } |
| 279 | |
| 280 | return se_sess; |
| 281 | } |
| 282 | EXPORT_SYMBOL(transport_init_session_tags); |
| 283 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 284 | /* |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 285 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 286 | */ |
| 287 | void __transport_register_session( |
| 288 | struct se_portal_group *se_tpg, |
| 289 | struct se_node_acl *se_nacl, |
| 290 | struct se_session *se_sess, |
| 291 | void *fabric_sess_ptr) |
| 292 | { |
| 293 | unsigned char buf[PR_REG_ISID_LEN]; |
| 294 | |
| 295 | se_sess->se_tpg = se_tpg; |
| 296 | se_sess->fabric_sess_ptr = fabric_sess_ptr; |
| 297 | /* |
| 298 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t |
| 299 | * |
| 300 | * Only set for struct se_session's that will actually be moving I/O. |
| 301 | * eg: *NOT* discovery sessions. |
| 302 | */ |
| 303 | if (se_nacl) { |
| 304 | /* |
| 305 | * If the fabric module supports an ISID based TransportID, |
| 306 | * save this value in binary from the fabric I_T Nexus now. |
| 307 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 308 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 309 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 310 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | &buf[0], PR_REG_ISID_LEN); |
| 312 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); |
| 313 | } |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 314 | kref_get(&se_nacl->acl_kref); |
| 315 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 316 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 317 | /* |
| 318 | * The se_nacl->nacl_sess pointer will be set to the |
| 319 | * last active I_T Nexus for each struct se_node_acl. |
| 320 | */ |
| 321 | se_nacl->nacl_sess = se_sess; |
| 322 | |
| 323 | list_add_tail(&se_sess->sess_acl_list, |
| 324 | &se_nacl->acl_sess_list); |
| 325 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 326 | } |
| 327 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); |
| 328 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 329 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 330 | 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] | 331 | } |
| 332 | EXPORT_SYMBOL(__transport_register_session); |
| 333 | |
| 334 | void transport_register_session( |
| 335 | struct se_portal_group *se_tpg, |
| 336 | struct se_node_acl *se_nacl, |
| 337 | struct se_session *se_sess, |
| 338 | void *fabric_sess_ptr) |
| 339 | { |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 340 | unsigned long flags; |
| 341 | |
| 342 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 343 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 344 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 345 | } |
| 346 | EXPORT_SYMBOL(transport_register_session); |
| 347 | |
Fengguang Wu | ecf0dd6 | 2012-10-10 07:30:20 +0800 | [diff] [blame] | 348 | static void target_release_session(struct kref *kref) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 349 | { |
| 350 | struct se_session *se_sess = container_of(kref, |
| 351 | struct se_session, sess_kref); |
| 352 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
| 353 | |
| 354 | se_tpg->se_tpg_tfo->close_session(se_sess); |
| 355 | } |
| 356 | |
| 357 | void target_get_session(struct se_session *se_sess) |
| 358 | { |
| 359 | kref_get(&se_sess->sess_kref); |
| 360 | } |
| 361 | EXPORT_SYMBOL(target_get_session); |
| 362 | |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 363 | void target_put_session(struct se_session *se_sess) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 364 | { |
Joern Engel | 4149268 | 2012-05-18 13:57:19 -0700 | [diff] [blame] | 365 | struct se_portal_group *tpg = se_sess->se_tpg; |
| 366 | |
| 367 | if (tpg->se_tpg_tfo->put_session != NULL) { |
| 368 | tpg->se_tpg_tfo->put_session(se_sess); |
| 369 | return; |
| 370 | } |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 371 | kref_put(&se_sess->sess_kref, target_release_session); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 372 | } |
| 373 | EXPORT_SYMBOL(target_put_session); |
| 374 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 375 | static void target_complete_nacl(struct kref *kref) |
| 376 | { |
| 377 | struct se_node_acl *nacl = container_of(kref, |
| 378 | struct se_node_acl, acl_kref); |
| 379 | |
| 380 | complete(&nacl->acl_free_comp); |
| 381 | } |
| 382 | |
| 383 | void target_put_nacl(struct se_node_acl *nacl) |
| 384 | { |
| 385 | kref_put(&nacl->acl_kref, target_complete_nacl); |
| 386 | } |
| 387 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 388 | void transport_deregister_session_configfs(struct se_session *se_sess) |
| 389 | { |
| 390 | struct se_node_acl *se_nacl; |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 391 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 392 | /* |
| 393 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session |
| 394 | */ |
| 395 | se_nacl = se_sess->se_node_acl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 396 | if (se_nacl) { |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 397 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 398 | if (se_nacl->acl_stop == 0) |
| 399 | list_del(&se_sess->sess_acl_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 400 | /* |
| 401 | * If the session list is empty, then clear the pointer. |
| 402 | * Otherwise, set the struct se_session pointer from the tail |
| 403 | * element of the per struct se_node_acl active session list. |
| 404 | */ |
| 405 | if (list_empty(&se_nacl->acl_sess_list)) |
| 406 | se_nacl->nacl_sess = NULL; |
| 407 | else { |
| 408 | se_nacl->nacl_sess = container_of( |
| 409 | se_nacl->acl_sess_list.prev, |
| 410 | struct se_session, sess_acl_list); |
| 411 | } |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 412 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 413 | } |
| 414 | } |
| 415 | EXPORT_SYMBOL(transport_deregister_session_configfs); |
| 416 | |
| 417 | void transport_free_session(struct se_session *se_sess) |
| 418 | { |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 419 | if (se_sess->sess_cmd_map) { |
| 420 | percpu_ida_destroy(&se_sess->sess_tag_pool); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 421 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 422 | vfree(se_sess->sess_cmd_map); |
| 423 | else |
| 424 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 425 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | kmem_cache_free(se_sess_cache, se_sess); |
| 427 | } |
| 428 | EXPORT_SYMBOL(transport_free_session); |
| 429 | |
| 430 | void transport_deregister_session(struct se_session *se_sess) |
| 431 | { |
| 432 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 433 | struct target_core_fabric_ops *se_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 434 | struct se_node_acl *se_nacl; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 435 | unsigned long flags; |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 436 | bool comp_nacl = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 437 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 438 | if (!se_tpg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 439 | transport_free_session(se_sess); |
| 440 | return; |
| 441 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 442 | se_tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 443 | |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 444 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 445 | list_del(&se_sess->sess_list); |
| 446 | se_sess->se_tpg = NULL; |
| 447 | se_sess->fabric_sess_ptr = NULL; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 448 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 449 | |
| 450 | /* |
| 451 | * Determine if we need to do extra work for this initiator node's |
| 452 | * struct se_node_acl if it had been previously dynamically generated. |
| 453 | */ |
| 454 | se_nacl = se_sess->se_node_acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 455 | |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 456 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
| 457 | if (se_nacl && se_nacl->dynamic_node_acl) { |
| 458 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { |
| 459 | list_del(&se_nacl->acl_list); |
| 460 | se_tpg->num_node_acls--; |
| 461 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
| 462 | core_tpg_wait_for_nacl_pr_ref(se_nacl); |
| 463 | core_free_device_list_for_node(se_nacl, se_tpg); |
| 464 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); |
| 465 | |
| 466 | comp_nacl = false; |
| 467 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 468 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 469 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 470 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 471 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 472 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 473 | se_tpg->se_tpg_tfo->get_fabric_name()); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 474 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 475 | * If last kref is dropping now for an explicit NodeACL, awake sleeping |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 476 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
| 477 | * removal context. |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 478 | */ |
| 479 | if (se_nacl && comp_nacl == true) |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 480 | target_put_nacl(se_nacl); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 481 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 482 | transport_free_session(se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 483 | } |
| 484 | EXPORT_SYMBOL(transport_deregister_session); |
| 485 | |
| 486 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 487 | * Called with cmd->t_state_lock held. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 488 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 489 | static void target_remove_from_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 490 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 491 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 492 | unsigned long flags; |
| 493 | |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 494 | if (!dev) |
| 495 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 496 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 497 | if (cmd->transport_state & CMD_T_BUSY) |
| 498 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 499 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 500 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 501 | if (cmd->state_active) { |
| 502 | list_del(&cmd->state_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 503 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 504 | } |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 505 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 506 | } |
| 507 | |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 508 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
| 509 | bool write_pending) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 510 | { |
| 511 | unsigned long flags; |
| 512 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 513 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 514 | if (write_pending) |
| 515 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
| 516 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 517 | if (remove_from_lists) { |
| 518 | target_remove_from_state_list(cmd); |
| 519 | |
| 520 | /* |
| 521 | * Clear struct se_cmd->se_lun before the handoff to FE. |
| 522 | */ |
| 523 | cmd->se_lun = NULL; |
| 524 | } |
| 525 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 526 | /* |
| 527 | * Determine if frontend context caller is requesting the stopping of |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 528 | * this command for frontend exceptions. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 529 | */ |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 530 | if (cmd->transport_state & CMD_T_STOP) { |
| 531 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", |
| 532 | __func__, __LINE__, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 533 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 534 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 535 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 536 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 537 | complete(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 538 | return 1; |
| 539 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 540 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 541 | cmd->transport_state &= ~CMD_T_ACTIVE; |
| 542 | if (remove_from_lists) { |
| 543 | /* |
| 544 | * Some fabric modules like tcm_loop can release |
| 545 | * their internally allocated I/O reference now and |
| 546 | * struct se_cmd now. |
| 547 | * |
| 548 | * Fabric modules are expected to return '1' here if the |
| 549 | * se_cmd being passed is released at this point, |
| 550 | * or zero if not being released. |
| 551 | */ |
| 552 | if (cmd->se_tfo->check_stop_free != NULL) { |
| 553 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 554 | return cmd->se_tfo->check_stop_free(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 555 | } |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 556 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 557 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 558 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) |
| 563 | { |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 564 | return transport_cmd_check_stop(cmd, true, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | static void transport_lun_remove_cmd(struct se_cmd *cmd) |
| 568 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 569 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 570 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 571 | if (!lun || !cmd->lun_ref_active) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 572 | return; |
| 573 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 574 | percpu_ref_put(&lun->lun_ref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) |
| 578 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 579 | if (transport_cmd_check_stop_to_fabric(cmd)) |
| 580 | return; |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 581 | if (remove) |
Christoph Hellwig | e6a2573 | 2011-09-13 23:08:50 +0200 | [diff] [blame] | 582 | transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 583 | } |
| 584 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 585 | static void target_complete_failure_work(struct work_struct *work) |
| 586 | { |
| 587 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
| 588 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 589 | transport_generic_request_failure(cmd, |
| 590 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 591 | } |
| 592 | |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 593 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 594 | * Used when asking transport to copy Sense Data from the underlying |
| 595 | * Linux/SCSI struct scsi_cmnd |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 596 | */ |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 597 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 598 | { |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 599 | struct se_device *dev = cmd->se_dev; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 600 | |
| 601 | WARN_ON(!cmd->se_lun); |
| 602 | |
| 603 | if (!dev) |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 604 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 605 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 606 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
| 607 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 608 | |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 609 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 610 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 611 | 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] | 612 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 613 | return cmd->sense_buffer; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 614 | } |
| 615 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 616 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 617 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 618 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 619 | int success = scsi_status == GOOD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 620 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 621 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 622 | cmd->scsi_status = scsi_status; |
| 623 | |
| 624 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 625 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 626 | cmd->transport_state &= ~CMD_T_BUSY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 627 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 628 | if (dev && dev->transport->transport_complete) { |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 629 | dev->transport->transport_complete(cmd, |
| 630 | cmd->t_data_sg, |
| 631 | transport_get_sense_buffer(cmd)); |
| 632 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 633 | success = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | /* |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 637 | * See if we are waiting to complete for an exception condition. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 638 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 639 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 640 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 641 | complete(&cmd->task_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 642 | return; |
| 643 | } |
Christoph Hellwig | 2235007 | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 644 | |
| 645 | if (!success) |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 646 | cmd->transport_state |= CMD_T_FAILED; |
Christoph Hellwig | 2235007 | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 647 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 648 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 649 | * Check for case where an explicit ABORT_TASK has been received |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 650 | * and transport_wait_for_tasks() will be waiting for completion.. |
| 651 | */ |
| 652 | if (cmd->transport_state & CMD_T_ABORTED && |
| 653 | cmd->transport_state & CMD_T_STOP) { |
| 654 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 655 | complete(&cmd->t_transport_stop_comp); |
| 656 | return; |
| 657 | } else if (cmd->transport_state & CMD_T_FAILED) { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 658 | INIT_WORK(&cmd->work, target_complete_failure_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 659 | } else { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 660 | INIT_WORK(&cmd->work, target_complete_ok_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 661 | } |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 662 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 663 | cmd->t_state = TRANSPORT_COMPLETE; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 664 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 665 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 666 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 667 | queue_work(target_completion_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 668 | } |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 669 | EXPORT_SYMBOL(target_complete_cmd); |
| 670 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 671 | static void target_add_to_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 672 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 673 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 674 | unsigned long flags; |
| 675 | |
Nicholas Bellinger | 4d2300c | 2011-11-30 18:18:33 -0800 | [diff] [blame] | 676 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 677 | if (!cmd->state_active) { |
| 678 | list_add_tail(&cmd->state_list, &dev->state_list); |
| 679 | cmd->state_active = true; |
| 680 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 681 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 682 | } |
| 683 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 684 | /* |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 685 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 686 | */ |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 687 | static void transport_write_pending_qf(struct se_cmd *cmd); |
| 688 | static void transport_complete_qf(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 689 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 690 | void target_qf_do_work(struct work_struct *work) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 691 | { |
| 692 | struct se_device *dev = container_of(work, struct se_device, |
| 693 | qf_work_queue); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 694 | LIST_HEAD(qf_cmd_list); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 695 | struct se_cmd *cmd, *cmd_tmp; |
| 696 | |
| 697 | spin_lock_irq(&dev->qf_cmd_lock); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 698 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
| 699 | spin_unlock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 700 | |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 701 | 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] | 702 | list_del(&cmd->se_qf_node); |
| 703 | atomic_dec(&dev->dev_qf_count); |
| 704 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 705 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 706 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 707 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 708 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 709 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
| 710 | : "UNKNOWN"); |
Christoph Hellwig | f7a5cc0 | 2011-10-17 13:56:42 -0400 | [diff] [blame] | 711 | |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 712 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
| 713 | transport_write_pending_qf(cmd); |
| 714 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) |
| 715 | transport_complete_qf(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 716 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 717 | } |
| 718 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 719 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
| 720 | { |
| 721 | switch (cmd->data_direction) { |
| 722 | case DMA_NONE: |
| 723 | return "NONE"; |
| 724 | case DMA_FROM_DEVICE: |
| 725 | return "READ"; |
| 726 | case DMA_TO_DEVICE: |
| 727 | return "WRITE"; |
| 728 | case DMA_BIDIRECTIONAL: |
| 729 | return "BIDI"; |
| 730 | default: |
| 731 | break; |
| 732 | } |
| 733 | |
| 734 | return "UNKNOWN"; |
| 735 | } |
| 736 | |
| 737 | void transport_dump_dev_state( |
| 738 | struct se_device *dev, |
| 739 | char *b, |
| 740 | int *bl) |
| 741 | { |
| 742 | *bl += sprintf(b + *bl, "Status: "); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 743 | if (dev->export_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 744 | *bl += sprintf(b + *bl, "ACTIVATED"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 745 | else |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 746 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 747 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 748 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
Nicholas Bellinger | 11e764b | 2012-05-09 12:42:09 -0700 | [diff] [blame] | 749 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 750 | dev->dev_attrib.block_size, |
| 751 | dev->dev_attrib.hw_max_sectors); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 752 | *bl += sprintf(b + *bl, " "); |
| 753 | } |
| 754 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 755 | void transport_dump_vpd_proto_id( |
| 756 | struct t10_vpd *vpd, |
| 757 | unsigned char *p_buf, |
| 758 | int p_buf_len) |
| 759 | { |
| 760 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 761 | int len; |
| 762 | |
| 763 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 764 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); |
| 765 | |
| 766 | switch (vpd->protocol_identifier) { |
| 767 | case 0x00: |
| 768 | sprintf(buf+len, "Fibre Channel\n"); |
| 769 | break; |
| 770 | case 0x10: |
| 771 | sprintf(buf+len, "Parallel SCSI\n"); |
| 772 | break; |
| 773 | case 0x20: |
| 774 | sprintf(buf+len, "SSA\n"); |
| 775 | break; |
| 776 | case 0x30: |
| 777 | sprintf(buf+len, "IEEE 1394\n"); |
| 778 | break; |
| 779 | case 0x40: |
| 780 | sprintf(buf+len, "SCSI Remote Direct Memory Access" |
| 781 | " Protocol\n"); |
| 782 | break; |
| 783 | case 0x50: |
| 784 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); |
| 785 | break; |
| 786 | case 0x60: |
| 787 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); |
| 788 | break; |
| 789 | case 0x70: |
| 790 | sprintf(buf+len, "Automation/Drive Interface Transport" |
| 791 | " Protocol\n"); |
| 792 | break; |
| 793 | case 0x80: |
| 794 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); |
| 795 | break; |
| 796 | default: |
| 797 | sprintf(buf+len, "Unknown 0x%02x\n", |
| 798 | vpd->protocol_identifier); |
| 799 | break; |
| 800 | } |
| 801 | |
| 802 | if (p_buf) |
| 803 | strncpy(p_buf, buf, p_buf_len); |
| 804 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 805 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | void |
| 809 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) |
| 810 | { |
| 811 | /* |
| 812 | * Check if the Protocol Identifier Valid (PIV) bit is set.. |
| 813 | * |
| 814 | * from spc3r23.pdf section 7.5.1 |
| 815 | */ |
| 816 | if (page_83[1] & 0x80) { |
| 817 | vpd->protocol_identifier = (page_83[0] & 0xf0); |
| 818 | vpd->protocol_identifier_set = 1; |
| 819 | transport_dump_vpd_proto_id(vpd, NULL, 0); |
| 820 | } |
| 821 | } |
| 822 | EXPORT_SYMBOL(transport_set_vpd_proto_id); |
| 823 | |
| 824 | int transport_dump_vpd_assoc( |
| 825 | struct t10_vpd *vpd, |
| 826 | unsigned char *p_buf, |
| 827 | int p_buf_len) |
| 828 | { |
| 829 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 830 | int ret = 0; |
| 831 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 832 | |
| 833 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 834 | len = sprintf(buf, "T10 VPD Identifier Association: "); |
| 835 | |
| 836 | switch (vpd->association) { |
| 837 | case 0x00: |
| 838 | sprintf(buf+len, "addressed logical unit\n"); |
| 839 | break; |
| 840 | case 0x10: |
| 841 | sprintf(buf+len, "target port\n"); |
| 842 | break; |
| 843 | case 0x20: |
| 844 | sprintf(buf+len, "SCSI target device\n"); |
| 845 | break; |
| 846 | default: |
| 847 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 848 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 849 | break; |
| 850 | } |
| 851 | |
| 852 | if (p_buf) |
| 853 | strncpy(p_buf, buf, p_buf_len); |
| 854 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 855 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 856 | |
| 857 | return ret; |
| 858 | } |
| 859 | |
| 860 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) |
| 861 | { |
| 862 | /* |
| 863 | * The VPD identification association.. |
| 864 | * |
| 865 | * from spc3r23.pdf Section 7.6.3.1 Table 297 |
| 866 | */ |
| 867 | vpd->association = (page_83[1] & 0x30); |
| 868 | return transport_dump_vpd_assoc(vpd, NULL, 0); |
| 869 | } |
| 870 | EXPORT_SYMBOL(transport_set_vpd_assoc); |
| 871 | |
| 872 | int transport_dump_vpd_ident_type( |
| 873 | struct t10_vpd *vpd, |
| 874 | unsigned char *p_buf, |
| 875 | int p_buf_len) |
| 876 | { |
| 877 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 878 | int ret = 0; |
| 879 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 880 | |
| 881 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 882 | len = sprintf(buf, "T10 VPD Identifier Type: "); |
| 883 | |
| 884 | switch (vpd->device_identifier_type) { |
| 885 | case 0x00: |
| 886 | sprintf(buf+len, "Vendor specific\n"); |
| 887 | break; |
| 888 | case 0x01: |
| 889 | sprintf(buf+len, "T10 Vendor ID based\n"); |
| 890 | break; |
| 891 | case 0x02: |
| 892 | sprintf(buf+len, "EUI-64 based\n"); |
| 893 | break; |
| 894 | case 0x03: |
| 895 | sprintf(buf+len, "NAA\n"); |
| 896 | break; |
| 897 | case 0x04: |
| 898 | sprintf(buf+len, "Relative target port identifier\n"); |
| 899 | break; |
| 900 | case 0x08: |
| 901 | sprintf(buf+len, "SCSI name string\n"); |
| 902 | break; |
| 903 | default: |
| 904 | sprintf(buf+len, "Unsupported: 0x%02x\n", |
| 905 | vpd->device_identifier_type); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 906 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 907 | break; |
| 908 | } |
| 909 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 910 | if (p_buf) { |
| 911 | if (p_buf_len < strlen(buf)+1) |
| 912 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 913 | strncpy(p_buf, buf, p_buf_len); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 914 | } else { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 915 | pr_debug("%s", buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 916 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 917 | |
| 918 | return ret; |
| 919 | } |
| 920 | |
| 921 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) |
| 922 | { |
| 923 | /* |
| 924 | * The VPD identifier type.. |
| 925 | * |
| 926 | * from spc3r23.pdf Section 7.6.3.1 Table 298 |
| 927 | */ |
| 928 | vpd->device_identifier_type = (page_83[1] & 0x0f); |
| 929 | return transport_dump_vpd_ident_type(vpd, NULL, 0); |
| 930 | } |
| 931 | EXPORT_SYMBOL(transport_set_vpd_ident_type); |
| 932 | |
| 933 | int transport_dump_vpd_ident( |
| 934 | struct t10_vpd *vpd, |
| 935 | unsigned char *p_buf, |
| 936 | int p_buf_len) |
| 937 | { |
| 938 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 939 | int ret = 0; |
| 940 | |
| 941 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 942 | |
| 943 | switch (vpd->device_identifier_code_set) { |
| 944 | case 0x01: /* Binary */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 945 | snprintf(buf, sizeof(buf), |
| 946 | "T10 VPD Binary Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 947 | &vpd->device_identifier[0]); |
| 948 | break; |
| 949 | case 0x02: /* ASCII */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 950 | snprintf(buf, sizeof(buf), |
| 951 | "T10 VPD ASCII Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 952 | &vpd->device_identifier[0]); |
| 953 | break; |
| 954 | case 0x03: /* UTF-8 */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 955 | snprintf(buf, sizeof(buf), |
| 956 | "T10 VPD UTF-8 Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 957 | &vpd->device_identifier[0]); |
| 958 | break; |
| 959 | default: |
| 960 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" |
| 961 | " 0x%02x", vpd->device_identifier_code_set); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 962 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 963 | break; |
| 964 | } |
| 965 | |
| 966 | if (p_buf) |
| 967 | strncpy(p_buf, buf, p_buf_len); |
| 968 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 969 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 970 | |
| 971 | return ret; |
| 972 | } |
| 973 | |
| 974 | int |
| 975 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) |
| 976 | { |
| 977 | static const char hex_str[] = "0123456789abcdef"; |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 978 | int j = 0, i = 4; /* offset to start of the identifier */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 979 | |
| 980 | /* |
| 981 | * The VPD Code Set (encoding) |
| 982 | * |
| 983 | * from spc3r23.pdf Section 7.6.3.1 Table 296 |
| 984 | */ |
| 985 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); |
| 986 | switch (vpd->device_identifier_code_set) { |
| 987 | case 0x01: /* Binary */ |
| 988 | vpd->device_identifier[j++] = |
| 989 | hex_str[vpd->device_identifier_type]; |
| 990 | while (i < (4 + page_83[3])) { |
| 991 | vpd->device_identifier[j++] = |
| 992 | hex_str[(page_83[i] & 0xf0) >> 4]; |
| 993 | vpd->device_identifier[j++] = |
| 994 | hex_str[page_83[i] & 0x0f]; |
| 995 | i++; |
| 996 | } |
| 997 | break; |
| 998 | case 0x02: /* ASCII */ |
| 999 | case 0x03: /* UTF-8 */ |
| 1000 | while (i < (4 + page_83[3])) |
| 1001 | vpd->device_identifier[j++] = page_83[i++]; |
| 1002 | break; |
| 1003 | default: |
| 1004 | break; |
| 1005 | } |
| 1006 | |
| 1007 | return transport_dump_vpd_ident(vpd, NULL, 0); |
| 1008 | } |
| 1009 | EXPORT_SYMBOL(transport_set_vpd_ident); |
| 1010 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1011 | sense_reason_t |
| 1012 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1013 | { |
| 1014 | struct se_device *dev = cmd->se_dev; |
| 1015 | |
| 1016 | if (cmd->unknown_data_length) { |
| 1017 | cmd->data_length = size; |
| 1018 | } else if (size != cmd->data_length) { |
| 1019 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
| 1020 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
| 1021 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
| 1022 | cmd->data_length, size, cmd->t_task_cdb[0]); |
| 1023 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1024 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 1025 | pr_err("Rejecting underflow/overflow" |
| 1026 | " WRITE data\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1027 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1028 | } |
| 1029 | /* |
| 1030 | * Reject READ_* or WRITE_* with overflow/underflow for |
| 1031 | * type SCF_SCSI_DATA_CDB. |
| 1032 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1033 | if (dev->dev_attrib.block_size != 512) { |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1034 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
| 1035 | " CDB on non 512-byte sector setup subsystem" |
| 1036 | " plugin: %s\n", dev->transport->name); |
| 1037 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1038 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1039 | } |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1040 | /* |
| 1041 | * For the overflow case keep the existing fabric provided |
| 1042 | * ->data_length. Otherwise for the underflow case, reset |
| 1043 | * ->data_length to the smaller SCSI expected data transfer |
| 1044 | * length. |
| 1045 | */ |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1046 | if (size > cmd->data_length) { |
| 1047 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; |
| 1048 | cmd->residual_count = (size - cmd->data_length); |
| 1049 | } else { |
| 1050 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 1051 | cmd->residual_count = (cmd->data_length - size); |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1052 | cmd->data_length = size; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1053 | } |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | return 0; |
| 1057 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1058 | } |
| 1059 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1060 | /* |
| 1061 | * Used by fabric modules containing a local struct se_cmd within their |
| 1062 | * fabric dependent per I/O descriptor. |
| 1063 | */ |
| 1064 | void transport_init_se_cmd( |
| 1065 | struct se_cmd *cmd, |
| 1066 | struct target_core_fabric_ops *tfo, |
| 1067 | struct se_session *se_sess, |
| 1068 | u32 data_length, |
| 1069 | int data_direction, |
| 1070 | int task_attr, |
| 1071 | unsigned char *sense_buffer) |
| 1072 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1073 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1074 | INIT_LIST_HEAD(&cmd->se_qf_node); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1075 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1076 | INIT_LIST_HEAD(&cmd->state_list); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1077 | init_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1078 | init_completion(&cmd->cmd_wait_comp); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1079 | init_completion(&cmd->task_stop_comp); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1080 | spin_lock_init(&cmd->t_state_lock); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1081 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1082 | |
| 1083 | cmd->se_tfo = tfo; |
| 1084 | cmd->se_sess = se_sess; |
| 1085 | cmd->data_length = data_length; |
| 1086 | cmd->data_direction = data_direction; |
| 1087 | cmd->sam_task_attr = task_attr; |
| 1088 | cmd->sense_buffer = sense_buffer; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1089 | |
| 1090 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1091 | } |
| 1092 | EXPORT_SYMBOL(transport_init_se_cmd); |
| 1093 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1094 | static sense_reason_t |
| 1095 | transport_check_alloc_task_attr(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1096 | { |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1097 | struct se_device *dev = cmd->se_dev; |
| 1098 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1099 | /* |
| 1100 | * Check if SAM Task Attribute emulation is enabled for this |
| 1101 | * struct se_device storage object |
| 1102 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1103 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1104 | return 0; |
| 1105 | |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1106 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1107 | pr_debug("SAM Task Attribute ACA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1108 | " emulation is not supported\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1109 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1110 | } |
| 1111 | /* |
| 1112 | * Used to determine when ORDERED commands should go from |
| 1113 | * Dormant to Active status. |
| 1114 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1115 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1116 | smp_mb__after_atomic_inc(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1117 | 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] | 1118 | cmd->se_ordered_id, cmd->sam_task_attr, |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1119 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1120 | return 0; |
| 1121 | } |
| 1122 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1123 | sense_reason_t |
| 1124 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1125 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1126 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1127 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1128 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1129 | /* |
| 1130 | * Ensure that the received CDB is less than the max (252 + 8) bytes |
| 1131 | * for VARIABLE_LENGTH_CMD |
| 1132 | */ |
| 1133 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1134 | pr_err("Received SCSI CDB with command_size: %d that" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1135 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
| 1136 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1137 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1138 | } |
| 1139 | /* |
| 1140 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, |
| 1141 | * allocate the additional extended CDB buffer now.. Otherwise |
| 1142 | * setup the pointer from __t_task_cdb to t_task_cdb. |
| 1143 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1144 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
| 1145 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1146 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1147 | if (!cmd->t_task_cdb) { |
| 1148 | pr_err("Unable to allocate cmd->t_task_cdb" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1149 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1150 | scsi_command_size(cdb), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1151 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1152 | return TCM_OUT_OF_RESOURCES; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1153 | } |
| 1154 | } else |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1155 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1156 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1157 | * Copy the original CDB into cmd-> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1158 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1159 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1160 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1161 | trace_target_sequencer_start(cmd); |
| 1162 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1163 | /* |
| 1164 | * Check for an existing UNIT ATTENTION condition |
| 1165 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1166 | ret = target_scsi3_ua_check(cmd); |
| 1167 | if (ret) |
| 1168 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1169 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1170 | ret = target_alua_state_check(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1171 | if (ret) |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1172 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1173 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1174 | ret = target_check_reservation(cmd); |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1175 | if (ret) { |
| 1176 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1177 | return ret; |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1178 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1179 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1180 | ret = dev->transport->parse_cdb(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1181 | if (ret) |
| 1182 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1183 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1184 | ret = transport_check_alloc_task_attr(cmd); |
| 1185 | if (ret) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1186 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1187 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1188 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1189 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1190 | spin_lock(&cmd->se_lun->lun_sep_lock); |
| 1191 | if (cmd->se_lun->lun_sep) |
| 1192 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; |
| 1193 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1194 | return 0; |
| 1195 | } |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1196 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1197 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1198 | /* |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1199 | * Used by fabric module frontends to queue tasks directly. |
| 1200 | * Many only be used from process context only |
| 1201 | */ |
| 1202 | int transport_handle_cdb_direct( |
| 1203 | struct se_cmd *cmd) |
| 1204 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1205 | sense_reason_t ret; |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1206 | |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1207 | if (!cmd->se_lun) { |
| 1208 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1209 | pr_err("cmd->se_lun is NULL\n"); |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1210 | return -EINVAL; |
| 1211 | } |
| 1212 | if (in_interrupt()) { |
| 1213 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1214 | pr_err("transport_generic_handle_cdb cannot be called" |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1215 | " from interrupt context\n"); |
| 1216 | return -EINVAL; |
| 1217 | } |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1218 | /* |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 1219 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
| 1220 | * outstanding descriptors are handled correctly during shutdown via |
| 1221 | * transport_wait_for_tasks() |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1222 | * |
| 1223 | * Also, we don't take cmd->t_state_lock here as we only expect |
| 1224 | * this to be called for initial descriptor submission. |
| 1225 | */ |
| 1226 | cmd->t_state = TRANSPORT_NEW_CMD; |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1227 | cmd->transport_state |= CMD_T_ACTIVE; |
| 1228 | |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1229 | /* |
| 1230 | * transport_generic_new_cmd() is already handling QUEUE_FULL, |
| 1231 | * so follow TRANSPORT_NEW_CMD processing thread context usage |
| 1232 | * and call transport_generic_request_failure() if necessary.. |
| 1233 | */ |
| 1234 | ret = transport_generic_new_cmd(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1235 | if (ret) |
| 1236 | transport_generic_request_failure(cmd, ret); |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1237 | return 0; |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1238 | } |
| 1239 | EXPORT_SYMBOL(transport_handle_cdb_direct); |
| 1240 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 1241 | sense_reason_t |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1242 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
| 1243 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
| 1244 | { |
| 1245 | if (!sgl || !sgl_count) |
| 1246 | return 0; |
| 1247 | |
| 1248 | /* |
| 1249 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming |
| 1250 | * scatterlists already have been set to follow what the fabric |
| 1251 | * passes for the original expected data transfer length. |
| 1252 | */ |
| 1253 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { |
| 1254 | pr_warn("Rejecting SCSI DATA overflow for fabric using" |
| 1255 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); |
| 1256 | return TCM_INVALID_CDB_FIELD; |
| 1257 | } |
| 1258 | |
| 1259 | cmd->t_data_sg = sgl; |
| 1260 | cmd->t_data_nents = sgl_count; |
| 1261 | |
| 1262 | if (sgl_bidi && sgl_bidi_count) { |
| 1263 | cmd->t_bidi_data_sg = sgl_bidi; |
| 1264 | cmd->t_bidi_data_nents = sgl_bidi_count; |
| 1265 | } |
| 1266 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 1267 | return 0; |
| 1268 | } |
| 1269 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1270 | /* |
| 1271 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized |
| 1272 | * se_cmd + use pre-allocated SGL memory. |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1273 | * |
| 1274 | * @se_cmd: command descriptor to submit |
| 1275 | * @se_sess: associated se_sess for endpoint |
| 1276 | * @cdb: pointer to SCSI CDB |
| 1277 | * @sense: pointer to SCSI sense buffer |
| 1278 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1279 | * @data_length: fabric expected data transfer length |
| 1280 | * @task_addr: SAM task attribute |
| 1281 | * @data_dir: DMA data direction |
| 1282 | * @flags: flags for command submission from target_sc_flags_tables |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1283 | * @sgl: struct scatterlist memory for unidirectional mapping |
| 1284 | * @sgl_count: scatterlist count for unidirectional mapping |
| 1285 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping |
| 1286 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1287 | * |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1288 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1289 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1290 | * but still return zero here. |
| 1291 | * |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1292 | * This may only be called from process context, and also currently |
| 1293 | * assumes internal allocation of fabric payload buffer by target-core. |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1294 | */ |
| 1295 | 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] | 1296 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1297 | u32 data_length, int task_attr, int data_dir, int flags, |
| 1298 | struct scatterlist *sgl, u32 sgl_count, |
| 1299 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1300 | { |
| 1301 | struct se_portal_group *se_tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1302 | sense_reason_t rc; |
| 1303 | int ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1304 | |
| 1305 | se_tpg = se_sess->se_tpg; |
| 1306 | BUG_ON(!se_tpg); |
| 1307 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); |
| 1308 | BUG_ON(in_interrupt()); |
| 1309 | /* |
| 1310 | * Initialize se_cmd for target operation. From this point |
| 1311 | * exceptions are handled by sending exception status via |
| 1312 | * target_core_fabric_ops->queue_status() callback |
| 1313 | */ |
| 1314 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1315 | data_length, data_dir, task_attr, sense); |
Sebastian Andrzej Siewior | b0d7994 | 2012-01-10 14:16:59 +0100 | [diff] [blame] | 1316 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
| 1317 | se_cmd->unknown_data_length = 1; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1318 | /* |
| 1319 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to |
| 1320 | * se_sess->sess_cmd_list. A second kref_get here is necessary |
| 1321 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second |
| 1322 | * kref_put() to happen during fabric packet acknowledgement. |
| 1323 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1324 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
| 1325 | if (ret) |
| 1326 | return ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1327 | /* |
| 1328 | * Signal bidirectional data payloads to target-core |
| 1329 | */ |
| 1330 | if (flags & TARGET_SCF_BIDI_OP) |
| 1331 | se_cmd->se_cmd_flags |= SCF_BIDI; |
| 1332 | /* |
| 1333 | * Locate se_lun pointer and attach it to struct se_cmd |
| 1334 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1335 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
| 1336 | if (rc) { |
| 1337 | transport_send_check_condition_and_sense(se_cmd, rc, 0); |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1338 | target_put_sess_cmd(se_sess, se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1339 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1340 | } |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1341 | |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1342 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1343 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1344 | transport_generic_request_failure(se_cmd, rc); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1345 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1346 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1347 | /* |
| 1348 | * When a non zero sgl_count has been passed perform SGL passthrough |
| 1349 | * mapping for pre-allocated fabric memory instead of having target |
| 1350 | * core perform an internal SGL allocation.. |
| 1351 | */ |
| 1352 | if (sgl_count != 0) { |
| 1353 | BUG_ON(!sgl); |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1354 | |
Nicholas Bellinger | 944981c | 2012-10-02 14:00:33 -0700 | [diff] [blame] | 1355 | /* |
| 1356 | * A work-around for tcm_loop as some userspace code via |
| 1357 | * scsi-generic do not memset their associated read buffers, |
| 1358 | * so go ahead and do that here for type non-data CDBs. Also |
| 1359 | * note that this is currently guaranteed to be a single SGL |
| 1360 | * for this case by target core in target_setup_cmd_from_cdb() |
| 1361 | * -> transport_generic_cmd_sequencer(). |
| 1362 | */ |
| 1363 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && |
| 1364 | se_cmd->data_direction == DMA_FROM_DEVICE) { |
| 1365 | unsigned char *buf = NULL; |
| 1366 | |
| 1367 | if (sgl) |
| 1368 | buf = kmap(sg_page(sgl)) + sgl->offset; |
| 1369 | |
| 1370 | if (buf) { |
| 1371 | memset(buf, 0, sgl->length); |
| 1372 | kunmap(sg_page(sgl)); |
| 1373 | } |
| 1374 | } |
| 1375 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1376 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
| 1377 | sgl_bidi, sgl_bidi_count); |
| 1378 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1379 | transport_generic_request_failure(se_cmd, rc); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1380 | return 0; |
| 1381 | } |
| 1382 | } |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1383 | /* |
| 1384 | * Check if we need to delay processing because of ALUA |
| 1385 | * Active/NonOptimized primary access state.. |
| 1386 | */ |
| 1387 | core_alua_check_nonop_delay(se_cmd); |
| 1388 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1389 | transport_handle_cdb_direct(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1390 | return 0; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1391 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1392 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
| 1393 | |
| 1394 | /* |
| 1395 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd |
| 1396 | * |
| 1397 | * @se_cmd: command descriptor to submit |
| 1398 | * @se_sess: associated se_sess for endpoint |
| 1399 | * @cdb: pointer to SCSI CDB |
| 1400 | * @sense: pointer to SCSI sense buffer |
| 1401 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1402 | * @data_length: fabric expected data transfer length |
| 1403 | * @task_addr: SAM task attribute |
| 1404 | * @data_dir: DMA data direction |
| 1405 | * @flags: flags for command submission from target_sc_flags_tables |
| 1406 | * |
| 1407 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1408 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1409 | * but still return zero here. |
| 1410 | * |
| 1411 | * This may only be called from process context, and also currently |
| 1412 | * assumes internal allocation of fabric payload buffer by target-core. |
| 1413 | * |
| 1414 | * It also assumes interal target core SGL memory allocation. |
| 1415 | */ |
| 1416 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
| 1417 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
| 1418 | u32 data_length, int task_attr, int data_dir, int flags) |
| 1419 | { |
| 1420 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, |
| 1421 | unpacked_lun, data_length, task_attr, data_dir, |
| 1422 | flags, NULL, 0, NULL, 0); |
| 1423 | } |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1424 | EXPORT_SYMBOL(target_submit_cmd); |
| 1425 | |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1426 | static void target_complete_tmr_failure(struct work_struct *work) |
| 1427 | { |
| 1428 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); |
| 1429 | |
| 1430 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; |
| 1431 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); |
Roland Dreier | 5a3b6fc | 2013-01-02 12:47:59 -0800 | [diff] [blame] | 1432 | |
| 1433 | transport_cmd_check_stop_to_fabric(se_cmd); |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1434 | } |
| 1435 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1436 | /** |
| 1437 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd |
| 1438 | * for TMR CDBs |
| 1439 | * |
| 1440 | * @se_cmd: command descriptor to submit |
| 1441 | * @se_sess: associated se_sess for endpoint |
| 1442 | * @sense: pointer to SCSI sense buffer |
| 1443 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1444 | * @fabric_context: fabric context for TMR req |
| 1445 | * @tm_type: Type of TM request |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1446 | * @gfp: gfp type for caller |
| 1447 | * @tag: referenced task tag for TMR_ABORT_TASK |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1448 | * @flags: submit cmd flags |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1449 | * |
| 1450 | * Callable from all contexts. |
| 1451 | **/ |
| 1452 | |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1453 | 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] | 1454 | unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1455 | void *fabric_tmr_ptr, unsigned char tm_type, |
| 1456 | gfp_t gfp, unsigned int tag, int flags) |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1457 | { |
| 1458 | struct se_portal_group *se_tpg; |
| 1459 | int ret; |
| 1460 | |
| 1461 | se_tpg = se_sess->se_tpg; |
| 1462 | BUG_ON(!se_tpg); |
| 1463 | |
| 1464 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1465 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1466 | /* |
| 1467 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req |
| 1468 | * allocation failure. |
| 1469 | */ |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1470 | 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] | 1471 | if (ret < 0) |
| 1472 | return -ENOMEM; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1473 | |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1474 | if (tm_type == TMR_ABORT_TASK) |
| 1475 | se_cmd->se_tmr_req->ref_task_tag = tag; |
| 1476 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1477 | /* See target_submit_cmd for commentary */ |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 1478 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
| 1479 | if (ret) { |
| 1480 | core_tmr_release_req(se_cmd->se_tmr_req); |
| 1481 | return ret; |
| 1482 | } |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1483 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1484 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
| 1485 | if (ret) { |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1486 | /* |
| 1487 | * For callback during failure handling, push this work off |
| 1488 | * to process context with TMR_LUN_DOES_NOT_EXIST status. |
| 1489 | */ |
| 1490 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); |
| 1491 | schedule_work(&se_cmd->work); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1492 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1493 | } |
| 1494 | transport_generic_handle_tmr(se_cmd); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1495 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1496 | } |
| 1497 | EXPORT_SYMBOL(target_submit_tmr); |
| 1498 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1499 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1500 | * 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] | 1501 | * has completed. |
| 1502 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1503 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1504 | { |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1505 | bool was_active = false; |
| 1506 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1507 | if (cmd->transport_state & CMD_T_BUSY) { |
| 1508 | cmd->transport_state |= CMD_T_REQUEST_STOP; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1509 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
| 1510 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1511 | pr_debug("cmd %p waiting to complete\n", cmd); |
| 1512 | wait_for_completion(&cmd->task_stop_comp); |
| 1513 | pr_debug("cmd %p stopped successfully\n", cmd); |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1514 | |
| 1515 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1516 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
| 1517 | cmd->transport_state &= ~CMD_T_BUSY; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1518 | was_active = true; |
| 1519 | } |
| 1520 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1521 | return was_active; |
| 1522 | } |
| 1523 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1524 | /* |
| 1525 | * Handle SAM-esque emulation for generic transport request failures. |
| 1526 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1527 | void transport_generic_request_failure(struct se_cmd *cmd, |
| 1528 | sense_reason_t sense_reason) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1529 | { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1530 | int ret = 0; |
| 1531 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1532 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1533 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1534 | cmd->t_task_cdb[0]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1535 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1536 | cmd->se_tfo->get_cmd_state(cmd), |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1537 | cmd->t_state, sense_reason); |
Christoph Hellwig | d43d6ae | 2012-04-24 00:25:08 -0400 | [diff] [blame] | 1538 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1539 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 1540 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 1541 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1542 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1543 | /* |
| 1544 | * For SAM Task Attribute emulation for failed struct se_cmd |
| 1545 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1546 | transport_complete_task_attr(cmd); |
Nicholas Bellinger | cf6d1f0 | 2013-08-21 19:34:43 -0700 | [diff] [blame] | 1547 | /* |
| 1548 | * Handle special case for COMPARE_AND_WRITE failure, where the |
| 1549 | * callback is expected to drop the per device ->caw_mutex. |
| 1550 | */ |
| 1551 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 1552 | cmd->transport_complete_callback) |
| 1553 | cmd->transport_complete_callback(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1554 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1555 | switch (sense_reason) { |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1556 | case TCM_NON_EXISTENT_LUN: |
| 1557 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 1558 | case TCM_INVALID_CDB_FIELD: |
| 1559 | case TCM_INVALID_PARAMETER_LIST: |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 1560 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1561 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 1562 | case TCM_UNKNOWN_MODE_PAGE: |
| 1563 | case TCM_WRITE_PROTECTED: |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 1564 | case TCM_ADDRESS_OUT_OF_RANGE: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1565 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 1566 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 1567 | case TCM_CHECK_CONDITION_NOT_READY: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1568 | break; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1569 | case TCM_OUT_OF_RESOURCES: |
| 1570 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1571 | break; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1572 | case TCM_RESERVATION_CONFLICT: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1573 | /* |
| 1574 | * No SENSE Data payload for this case, set SCSI Status |
| 1575 | * and queue the response to $FABRIC_MOD. |
| 1576 | * |
| 1577 | * Uses linux/include/scsi/scsi.h SAM status codes defs |
| 1578 | */ |
| 1579 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
| 1580 | /* |
| 1581 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will |
| 1582 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION |
| 1583 | * CONFLICT STATUS. |
| 1584 | * |
| 1585 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 |
| 1586 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1587 | if (cmd->se_sess && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1588 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1589 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1590 | cmd->orig_fe_lun, 0x2C, |
| 1591 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); |
| 1592 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1593 | trace_target_cmd_complete(cmd); |
| 1594 | ret = cmd->se_tfo-> queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1595 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1596 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1597 | goto check_stop; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1598 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1599 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1600 | cmd->t_task_cdb[0], sense_reason); |
| 1601 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1602 | break; |
| 1603 | } |
Christoph Hellwig | f314643 | 2012-07-08 15:58:48 -0400 | [diff] [blame] | 1604 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1605 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1606 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1607 | goto queue_full; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1608 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1609 | check_stop: |
| 1610 | transport_lun_remove_cmd(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1611 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1612 | ; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1613 | return; |
| 1614 | |
| 1615 | queue_full: |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1616 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1617 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1618 | } |
Nicholas Bellinger | 2fbff12 | 2012-02-10 16:18:11 -0800 | [diff] [blame] | 1619 | EXPORT_SYMBOL(transport_generic_request_failure); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1620 | |
Nicholas Bellinger | 76dde50 | 2013-08-21 16:04:10 -0700 | [diff] [blame] | 1621 | void __target_execute_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1622 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1623 | sense_reason_t ret; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1624 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1625 | if (cmd->execute_cmd) { |
| 1626 | ret = cmd->execute_cmd(cmd); |
| 1627 | if (ret) { |
| 1628 | spin_lock_irq(&cmd->t_state_lock); |
| 1629 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
| 1630 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1631 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1632 | transport_generic_request_failure(cmd, ret); |
| 1633 | } |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1634 | } |
| 1635 | } |
| 1636 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1637 | static bool target_handle_task_attr(struct se_cmd *cmd) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1638 | { |
| 1639 | struct se_device *dev = cmd->se_dev; |
| 1640 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1641 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 1642 | return false; |
| 1643 | |
| 1644 | /* |
| 1645 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
| 1646 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
| 1647 | */ |
| 1648 | switch (cmd->sam_task_attr) { |
| 1649 | case MSG_HEAD_TAG: |
| 1650 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
| 1651 | "se_ordered_id: %u\n", |
| 1652 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1653 | return false; |
| 1654 | case MSG_ORDERED_TAG: |
| 1655 | atomic_inc(&dev->dev_ordered_sync); |
| 1656 | smp_mb__after_atomic_inc(); |
| 1657 | |
| 1658 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
| 1659 | " se_ordered_id: %u\n", |
| 1660 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1661 | |
| 1662 | /* |
| 1663 | * Execute an ORDERED command if no other older commands |
| 1664 | * exist that need to be completed first. |
| 1665 | */ |
| 1666 | if (!atomic_read(&dev->simple_cmds)) |
| 1667 | return false; |
| 1668 | break; |
| 1669 | default: |
| 1670 | /* |
| 1671 | * For SIMPLE and UNTAGGED Task Attribute commands |
| 1672 | */ |
| 1673 | atomic_inc(&dev->simple_cmds); |
| 1674 | smp_mb__after_atomic_inc(); |
| 1675 | break; |
| 1676 | } |
| 1677 | |
| 1678 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
| 1679 | return false; |
| 1680 | |
| 1681 | spin_lock(&dev->delayed_cmd_lock); |
| 1682 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); |
| 1683 | spin_unlock(&dev->delayed_cmd_lock); |
| 1684 | |
| 1685 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
| 1686 | " delayed CMD list, se_ordered_id: %u\n", |
| 1687 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
| 1688 | cmd->se_ordered_id); |
| 1689 | return true; |
| 1690 | } |
| 1691 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1692 | void target_execute_cmd(struct se_cmd *cmd) |
| 1693 | { |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1694 | /* |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1695 | * If the received CDB has aleady been aborted stop processing it here. |
| 1696 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1697 | if (transport_check_aborted_status(cmd, 1)) |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1698 | return; |
| 1699 | |
| 1700 | /* |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1701 | * Determine if frontend context caller is requesting the stopping of |
| 1702 | * this command for frontend exceptions. |
| 1703 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1704 | spin_lock_irq(&cmd->t_state_lock); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1705 | if (cmd->transport_state & CMD_T_STOP) { |
| 1706 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", |
| 1707 | __func__, __LINE__, |
| 1708 | cmd->se_tfo->get_task_tag(cmd)); |
| 1709 | |
| 1710 | spin_unlock_irq(&cmd->t_state_lock); |
| 1711 | complete(&cmd->t_transport_stop_comp); |
| 1712 | return; |
| 1713 | } |
| 1714 | |
| 1715 | cmd->t_state = TRANSPORT_PROCESSING; |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1716 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1717 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1718 | |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1719 | if (target_handle_task_attr(cmd)) { |
| 1720 | spin_lock_irq(&cmd->t_state_lock); |
| 1721 | cmd->transport_state &= ~CMD_T_BUSY|CMD_T_SENT; |
| 1722 | spin_unlock_irq(&cmd->t_state_lock); |
| 1723 | return; |
| 1724 | } |
| 1725 | |
| 1726 | __target_execute_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1727 | } |
Christoph Hellwig | 70baf0a | 2012-07-08 15:58:39 -0400 | [diff] [blame] | 1728 | EXPORT_SYMBOL(target_execute_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1729 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1730 | /* |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1731 | * Process all commands up to the last received ORDERED task attribute which |
| 1732 | * requires another blocking boundary |
| 1733 | */ |
| 1734 | static void target_restart_delayed_cmds(struct se_device *dev) |
| 1735 | { |
| 1736 | for (;;) { |
| 1737 | struct se_cmd *cmd; |
| 1738 | |
| 1739 | spin_lock(&dev->delayed_cmd_lock); |
| 1740 | if (list_empty(&dev->delayed_cmd_list)) { |
| 1741 | spin_unlock(&dev->delayed_cmd_lock); |
| 1742 | break; |
| 1743 | } |
| 1744 | |
| 1745 | cmd = list_entry(dev->delayed_cmd_list.next, |
| 1746 | struct se_cmd, se_delayed_node); |
| 1747 | list_del(&cmd->se_delayed_node); |
| 1748 | spin_unlock(&dev->delayed_cmd_lock); |
| 1749 | |
| 1750 | __target_execute_cmd(cmd); |
| 1751 | |
| 1752 | if (cmd->sam_task_attr == MSG_ORDERED_TAG) |
| 1753 | break; |
| 1754 | } |
| 1755 | } |
| 1756 | |
| 1757 | /* |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1758 | * Called from I/O completion to determine which dormant/delayed |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1759 | * and ordered cmds need to have their tasks added to the execution queue. |
| 1760 | */ |
| 1761 | static void transport_complete_task_attr(struct se_cmd *cmd) |
| 1762 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1763 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1764 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1765 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 1766 | return; |
| 1767 | |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1768 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1769 | atomic_dec(&dev->simple_cmds); |
| 1770 | smp_mb__after_atomic_dec(); |
| 1771 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1772 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1773 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
| 1774 | cmd->se_ordered_id); |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1775 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1776 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1777 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1778 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
| 1779 | cmd->se_ordered_id); |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1780 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1781 | atomic_dec(&dev->dev_ordered_sync); |
| 1782 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1783 | |
| 1784 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1785 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1786 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
| 1787 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1788 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1789 | target_restart_delayed_cmds(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1790 | } |
| 1791 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1792 | static void transport_complete_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1793 | { |
| 1794 | int ret = 0; |
| 1795 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1796 | transport_complete_task_attr(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1797 | |
| 1798 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1799 | trace_target_cmd_complete(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1800 | ret = cmd->se_tfo->queue_status(cmd); |
| 1801 | if (ret) |
| 1802 | goto out; |
| 1803 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1804 | |
| 1805 | switch (cmd->data_direction) { |
| 1806 | case DMA_FROM_DEVICE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1807 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1808 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1809 | break; |
| 1810 | case DMA_TO_DEVICE: |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 1811 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1812 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1813 | if (ret < 0) |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1814 | break; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1815 | } |
| 1816 | /* Fall through for DMA_TO_DEVICE */ |
| 1817 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1818 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1819 | ret = cmd->se_tfo->queue_status(cmd); |
| 1820 | break; |
| 1821 | default: |
| 1822 | break; |
| 1823 | } |
| 1824 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1825 | out: |
| 1826 | if (ret < 0) { |
| 1827 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 1828 | return; |
| 1829 | } |
| 1830 | transport_lun_remove_cmd(cmd); |
| 1831 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1832 | } |
| 1833 | |
| 1834 | static void transport_handle_queue_full( |
| 1835 | struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1836 | struct se_device *dev) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1837 | { |
| 1838 | spin_lock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1839 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
| 1840 | atomic_inc(&dev->dev_qf_count); |
| 1841 | smp_mb__after_atomic_inc(); |
| 1842 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
| 1843 | |
| 1844 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1845 | } |
| 1846 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1847 | static void target_complete_ok_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1848 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1849 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1850 | int ret; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1851 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1852 | /* |
| 1853 | * Check if we need to move delayed/dormant tasks from cmds on the |
| 1854 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task |
| 1855 | * Attribute. |
| 1856 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1857 | transport_complete_task_attr(cmd); |
| 1858 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1859 | /* |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1860 | * Check to schedule QUEUE_FULL work, or execute an existing |
| 1861 | * cmd->transport_qf_callback() |
| 1862 | */ |
| 1863 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) |
| 1864 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1865 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1866 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 1867 | * Check if we need to send a sense buffer from |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1868 | * the struct se_cmd in question. |
| 1869 | */ |
| 1870 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1871 | WARN_ON(!cmd->scsi_status); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1872 | ret = transport_send_check_condition_and_sense( |
| 1873 | cmd, 0, 1); |
| 1874 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1875 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1876 | |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1877 | transport_lun_remove_cmd(cmd); |
| 1878 | transport_cmd_check_stop_to_fabric(cmd); |
| 1879 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1880 | } |
| 1881 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1882 | * Check for a callback, used by amongst other things |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1883 | * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1884 | */ |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1885 | if (cmd->transport_complete_callback) { |
| 1886 | sense_reason_t rc; |
| 1887 | |
| 1888 | rc = cmd->transport_complete_callback(cmd); |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 1889 | if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) { |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1890 | return; |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 1891 | } else if (rc) { |
| 1892 | ret = transport_send_check_condition_and_sense(cmd, |
| 1893 | rc, 0); |
| 1894 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1895 | goto queue_full; |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1896 | |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 1897 | transport_lun_remove_cmd(cmd); |
| 1898 | transport_cmd_check_stop_to_fabric(cmd); |
| 1899 | return; |
| 1900 | } |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1901 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1902 | |
| 1903 | switch (cmd->data_direction) { |
| 1904 | case DMA_FROM_DEVICE: |
| 1905 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1906 | if (cmd->se_lun->lun_sep) { |
| 1907 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1908 | cmd->data_length; |
| 1909 | } |
| 1910 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1911 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1912 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1913 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1914 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1915 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1916 | break; |
| 1917 | case DMA_TO_DEVICE: |
| 1918 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1919 | if (cmd->se_lun->lun_sep) { |
| 1920 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1921 | cmd->data_length; |
| 1922 | } |
| 1923 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1924 | /* |
| 1925 | * Check if we need to send READ payload for BIDI-COMMAND |
| 1926 | */ |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 1927 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1928 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1929 | if (cmd->se_lun->lun_sep) { |
| 1930 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1931 | cmd->data_length; |
| 1932 | } |
| 1933 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1934 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1935 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1936 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1937 | break; |
| 1938 | } |
| 1939 | /* Fall through for DMA_TO_DEVICE */ |
| 1940 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1941 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1942 | ret = cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1943 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1944 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1945 | break; |
| 1946 | default: |
| 1947 | break; |
| 1948 | } |
| 1949 | |
| 1950 | transport_lun_remove_cmd(cmd); |
| 1951 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1952 | return; |
| 1953 | |
| 1954 | queue_full: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1955 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1956 | " data_direction: %d\n", cmd, cmd->data_direction); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1957 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1958 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1959 | } |
| 1960 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1961 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1962 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1963 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1964 | int count; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1965 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1966 | for_each_sg(sgl, sg, nents, count) |
| 1967 | __free_page(sg_page(sg)); |
| 1968 | |
| 1969 | kfree(sgl); |
| 1970 | } |
| 1971 | |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 1972 | static inline void transport_reset_sgl_orig(struct se_cmd *cmd) |
| 1973 | { |
| 1974 | /* |
| 1975 | * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE |
| 1976 | * emulation, and free + reset pointers if necessary.. |
| 1977 | */ |
| 1978 | if (!cmd->t_data_sg_orig) |
| 1979 | return; |
| 1980 | |
| 1981 | kfree(cmd->t_data_sg); |
| 1982 | cmd->t_data_sg = cmd->t_data_sg_orig; |
| 1983 | cmd->t_data_sg_orig = NULL; |
| 1984 | cmd->t_data_nents = cmd->t_data_nents_orig; |
| 1985 | cmd->t_data_nents_orig = 0; |
| 1986 | } |
| 1987 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1988 | static inline void transport_free_pages(struct se_cmd *cmd) |
| 1989 | { |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 1990 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { |
| 1991 | transport_reset_sgl_orig(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1992 | return; |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 1993 | } |
| 1994 | transport_reset_sgl_orig(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1995 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1996 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 1997 | cmd->t_data_sg = NULL; |
| 1998 | cmd->t_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1999 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2000 | 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] | 2001 | cmd->t_bidi_data_sg = NULL; |
| 2002 | cmd->t_bidi_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2003 | } |
| 2004 | |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2005 | /** |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2006 | * transport_release_cmd - free a command |
| 2007 | * @cmd: command to free |
| 2008 | * |
| 2009 | * This routine unconditionally frees a command, and reference counting |
| 2010 | * or list removal must be done in the caller. |
| 2011 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2012 | static int transport_release_cmd(struct se_cmd *cmd) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2013 | { |
| 2014 | BUG_ON(!cmd->se_tfo); |
| 2015 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2016 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2017 | core_tmr_release_req(cmd->se_tmr_req); |
| 2018 | if (cmd->t_task_cdb != cmd->__t_task_cdb) |
| 2019 | kfree(cmd->t_task_cdb); |
| 2020 | /* |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2021 | * If this cmd has been setup with target_get_sess_cmd(), drop |
| 2022 | * the kref and call ->release_cmd() in kref callback. |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2023 | */ |
Nicholas Bellinger | ca24976 | 2013-06-06 02:06:14 -0700 | [diff] [blame] | 2024 | return target_put_sess_cmd(cmd->se_sess, cmd); |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2025 | } |
| 2026 | |
| 2027 | /** |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2028 | * transport_put_cmd - release a reference to a command |
| 2029 | * @cmd: command to release |
| 2030 | * |
| 2031 | * This routine releases our reference to the command and frees it if possible. |
| 2032 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2033 | static int transport_put_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2034 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2035 | transport_free_pages(cmd); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2036 | return transport_release_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2037 | } |
| 2038 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2039 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2040 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2041 | struct scatterlist *sg = cmd->t_data_sg; |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2042 | struct page **pages; |
| 2043 | int i; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2044 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2045 | /* |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2046 | * We need to take into account a possible offset here for fabrics like |
| 2047 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for |
| 2048 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2049 | */ |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2050 | if (!cmd->t_data_nents) |
| 2051 | return NULL; |
Paolo Bonzini | 3717ef0 | 2012-09-07 17:30:35 +0200 | [diff] [blame] | 2052 | |
| 2053 | BUG_ON(!sg); |
| 2054 | if (cmd->t_data_nents == 1) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2055 | return kmap(sg_page(sg)) + sg->offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2056 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2057 | /* >1 page. use vmap */ |
| 2058 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2059 | if (!pages) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2060 | return NULL; |
| 2061 | |
| 2062 | /* convert sg[] to pages[] */ |
| 2063 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { |
| 2064 | pages[i] = sg_page(sg); |
| 2065 | } |
| 2066 | |
| 2067 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); |
| 2068 | kfree(pages); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2069 | if (!cmd->t_data_vmap) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2070 | return NULL; |
| 2071 | |
| 2072 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2073 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2074 | EXPORT_SYMBOL(transport_kmap_data_sg); |
| 2075 | |
| 2076 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
| 2077 | { |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2078 | if (!cmd->t_data_nents) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2079 | return; |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2080 | } else if (cmd->t_data_nents == 1) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2081 | kunmap(sg_page(cmd->t_data_sg)); |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2082 | return; |
| 2083 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2084 | |
| 2085 | vunmap(cmd->t_data_vmap); |
| 2086 | cmd->t_data_vmap = NULL; |
| 2087 | } |
| 2088 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2089 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 2090 | int |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2091 | target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, |
| 2092 | bool zero_page) |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2093 | { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2094 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2095 | struct page *page; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2096 | gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; |
| 2097 | unsigned int nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2098 | int i = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2099 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2100 | nent = DIV_ROUND_UP(length, PAGE_SIZE); |
| 2101 | sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL); |
| 2102 | if (!sg) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2103 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2104 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2105 | sg_init_table(sg, nent); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2106 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2107 | while (length) { |
| 2108 | u32 page_len = min_t(u32, length, PAGE_SIZE); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2109 | page = alloc_page(GFP_KERNEL | zero_flag); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2110 | if (!page) |
| 2111 | goto out; |
| 2112 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2113 | sg_set_page(&sg[i], page, page_len, 0); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2114 | length -= page_len; |
| 2115 | i++; |
| 2116 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2117 | *sgl = sg; |
| 2118 | *nents = nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2119 | return 0; |
| 2120 | |
| 2121 | out: |
Yi Zou | d0e27c8 | 2012-08-14 16:06:43 -0700 | [diff] [blame] | 2122 | while (i > 0) { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2123 | i--; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2124 | __free_page(sg_page(&sg[i])); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2125 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2126 | kfree(sg); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2127 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2128 | } |
| 2129 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2130 | /* |
Andy Grover | b16a35b | 2012-04-03 15:51:21 -0700 | [diff] [blame] | 2131 | * Allocate any required resources to execute the command. For writes we |
| 2132 | * might not have the payload yet, so notify the fabric via a call to |
| 2133 | * ->write_pending instead. Otherwise place it on the execution queue. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2134 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2135 | sense_reason_t |
| 2136 | transport_generic_new_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2137 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2138 | int ret = 0; |
| 2139 | |
| 2140 | /* |
| 2141 | * Determine is the TCM fabric module has already allocated physical |
| 2142 | * memory, and is directly calling transport_generic_map_mem_to_cmd() |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2143 | * beforehand. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2144 | */ |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2145 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
| 2146 | cmd->data_length) { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2147 | bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB); |
| 2148 | |
Nicholas Bellinger | 8cefe07 | 2013-08-25 16:10:57 -0700 | [diff] [blame] | 2149 | if ((cmd->se_cmd_flags & SCF_BIDI) || |
| 2150 | (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) { |
| 2151 | u32 bidi_length; |
| 2152 | |
| 2153 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) |
| 2154 | bidi_length = cmd->t_task_nolb * |
| 2155 | cmd->se_dev->dev_attrib.block_size; |
| 2156 | else |
| 2157 | bidi_length = cmd->data_length; |
| 2158 | |
| 2159 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, |
| 2160 | &cmd->t_bidi_data_nents, |
| 2161 | bidi_length, zero_flag); |
| 2162 | if (ret < 0) |
| 2163 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 2164 | } |
| 2165 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2166 | ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
| 2167 | cmd->data_length, zero_flag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2168 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2169 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2170 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2171 | /* |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2172 | * If this command is not a write we can execute it right here, |
| 2173 | * for write buffers we need to notify the fabric driver first |
| 2174 | * and let it call back once the write buffers are ready. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2175 | */ |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 2176 | target_add_to_state_list(cmd); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2177 | if (cmd->data_direction != DMA_TO_DEVICE) { |
| 2178 | target_execute_cmd(cmd); |
| 2179 | return 0; |
| 2180 | } |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 2181 | transport_cmd_check_stop(cmd, false, true); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2182 | |
| 2183 | ret = cmd->se_tfo->write_pending(cmd); |
| 2184 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2185 | goto queue_full; |
| 2186 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2187 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
| 2188 | WARN_ON(ret); |
Christoph Hellwig | da0f761 | 2011-10-18 06:57:01 -0400 | [diff] [blame] | 2189 | |
Nicholas Bellinger | b69c1fc | 2012-11-06 15:43:53 -0800 | [diff] [blame] | 2190 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2191 | |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2192 | queue_full: |
| 2193 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
| 2194 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
| 2195 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2196 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2197 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2198 | EXPORT_SYMBOL(transport_generic_new_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2199 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2200 | static void transport_write_pending_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2201 | { |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2202 | int ret; |
| 2203 | |
| 2204 | ret = cmd->se_tfo->write_pending(cmd); |
| 2205 | if (ret == -EAGAIN || ret == -ENOMEM) { |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2206 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
| 2207 | cmd); |
| 2208 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2209 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2210 | } |
| 2211 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2212 | 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] | 2213 | { |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2214 | unsigned long flags; |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2215 | int ret = 0; |
| 2216 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2217 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2218 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2219 | transport_wait_for_tasks(cmd); |
| 2220 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2221 | ret = transport_release_cmd(cmd); |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2222 | } else { |
| 2223 | if (wait_for_tasks) |
| 2224 | transport_wait_for_tasks(cmd); |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2225 | /* |
| 2226 | * Handle WRITE failure case where transport_generic_new_cmd() |
| 2227 | * has already added se_cmd to state_list, but fabric has |
| 2228 | * failed command before I/O submission. |
| 2229 | */ |
| 2230 | if (cmd->state_active) { |
| 2231 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 2232 | target_remove_from_state_list(cmd); |
| 2233 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2234 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2235 | |
Christoph Hellwig | 82f1c8a | 2011-09-13 23:09:01 +0200 | [diff] [blame] | 2236 | if (cmd->se_lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2237 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2238 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2239 | ret = transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2240 | } |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2241 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2242 | } |
| 2243 | EXPORT_SYMBOL(transport_generic_free_cmd); |
| 2244 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2245 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
| 2246 | * @se_sess: session to reference |
| 2247 | * @se_cmd: command descriptor to add |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2248 | * @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] | 2249 | */ |
Nicholas Bellinger | 20361e6 | 2013-03-21 22:54:28 -0700 | [diff] [blame] | 2250 | int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2251 | bool ack_kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2252 | { |
| 2253 | unsigned long flags; |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2254 | int ret = 0; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2255 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2256 | kref_init(&se_cmd->cmd_kref); |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2257 | /* |
| 2258 | * Add a second kref if the fabric caller is expecting to handle |
| 2259 | * fabric acknowledgement that requires two target_put_sess_cmd() |
| 2260 | * invocations before se_cmd descriptor release. |
| 2261 | */ |
Nicholas Bellinger | 8671556 | 2012-02-13 01:07:22 -0800 | [diff] [blame] | 2262 | if (ack_kref == true) { |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2263 | kref_get(&se_cmd->cmd_kref); |
Nicholas Bellinger | 8671556 | 2012-02-13 01:07:22 -0800 | [diff] [blame] | 2264 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
| 2265 | } |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2266 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2267 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2268 | if (se_sess->sess_tearing_down) { |
| 2269 | ret = -ESHUTDOWN; |
| 2270 | goto out; |
| 2271 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2272 | 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] | 2273 | out: |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2274 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2275 | return ret; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2276 | } |
Nicholas Bellinger | 20361e6 | 2013-03-21 22:54:28 -0700 | [diff] [blame] | 2277 | EXPORT_SYMBOL(target_get_sess_cmd); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2278 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2279 | static void target_release_cmd_kref(struct kref *kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2280 | { |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2281 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
| 2282 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2283 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2284 | if (list_empty(&se_cmd->se_cmd_list)) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2285 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | ffc32d5 | 2012-02-13 02:35:01 -0800 | [diff] [blame] | 2286 | se_cmd->se_tfo->release_cmd(se_cmd); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2287 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2288 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2289 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2290 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2291 | complete(&se_cmd->cmd_wait_comp); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2292 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2293 | } |
| 2294 | list_del(&se_cmd->se_cmd_list); |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2295 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2296 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2297 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2298 | } |
| 2299 | |
| 2300 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put |
| 2301 | * @se_sess: session to reference |
| 2302 | * @se_cmd: command descriptor to drop |
| 2303 | */ |
| 2304 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) |
| 2305 | { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2306 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
| 2307 | &se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2308 | } |
| 2309 | EXPORT_SYMBOL(target_put_sess_cmd); |
| 2310 | |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2311 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
| 2312 | * sess_cmd_list to complete cmd_wait_comp. Set |
| 2313 | * sess_tearing_down so no more commands are queued. |
| 2314 | * @se_sess: session to flag |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2315 | */ |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2316 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2317 | { |
| 2318 | struct se_cmd *se_cmd; |
| 2319 | unsigned long flags; |
| 2320 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2321 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2322 | if (se_sess->sess_tearing_down) { |
| 2323 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2324 | return; |
| 2325 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2326 | se_sess->sess_tearing_down = 1; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2327 | 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] | 2328 | |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2329 | 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] | 2330 | se_cmd->cmd_wait_set = 1; |
| 2331 | |
| 2332 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2333 | } |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2334 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2335 | |
| 2336 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors |
| 2337 | * @se_sess: session to wait for active I/O |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2338 | */ |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2339 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2340 | { |
| 2341 | struct se_cmd *se_cmd, *tmp_cmd; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2342 | unsigned long flags; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2343 | |
| 2344 | list_for_each_entry_safe(se_cmd, tmp_cmd, |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2345 | &se_sess->sess_wait_list, se_cmd_list) { |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2346 | list_del(&se_cmd->se_cmd_list); |
| 2347 | |
| 2348 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" |
| 2349 | " %d\n", se_cmd, se_cmd->t_state, |
| 2350 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2351 | |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2352 | wait_for_completion(&se_cmd->cmd_wait_comp); |
| 2353 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" |
| 2354 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2355 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2356 | |
| 2357 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2358 | } |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2359 | |
| 2360 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
| 2361 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); |
| 2362 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2363 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2364 | } |
| 2365 | EXPORT_SYMBOL(target_wait_for_sess_cmds); |
| 2366 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2367 | static int transport_clear_lun_ref_thread(void *p) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2368 | { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 2369 | struct se_lun *lun = p; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2370 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2371 | percpu_ref_kill(&lun->lun_ref); |
| 2372 | |
| 2373 | wait_for_completion(&lun->lun_ref_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2374 | complete(&lun->lun_shutdown_comp); |
| 2375 | |
| 2376 | return 0; |
| 2377 | } |
| 2378 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2379 | int transport_clear_lun_ref(struct se_lun *lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2380 | { |
| 2381 | struct task_struct *kt; |
| 2382 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2383 | kt = kthread_run(transport_clear_lun_ref_thread, lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2384 | "tcm_cl_%u", lun->unpacked_lun); |
| 2385 | if (IS_ERR(kt)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2386 | pr_err("Unable to start clear_lun thread\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2387 | return PTR_ERR(kt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2388 | } |
| 2389 | wait_for_completion(&lun->lun_shutdown_comp); |
| 2390 | |
| 2391 | return 0; |
| 2392 | } |
| 2393 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2394 | /** |
| 2395 | * transport_wait_for_tasks - wait for completion to occur |
| 2396 | * @cmd: command to wait |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2397 | * |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2398 | * Called from frontend fabric context to wait for storage engine |
| 2399 | * to pause and/or release frontend generated struct se_cmd. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2400 | */ |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2401 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2402 | { |
| 2403 | unsigned long flags; |
| 2404 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2405 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2406 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
| 2407 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2408 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2409 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2410 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 2411 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2412 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
| 2413 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2414 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2415 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2416 | } |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2417 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2418 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2419 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2420 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2421 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2422 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2423 | cmd->transport_state |= CMD_T_STOP; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2424 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2425 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2426 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 2427 | cmd, cmd->se_tfo->get_task_tag(cmd), |
| 2428 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2429 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2430 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2431 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2432 | wait_for_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2433 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2434 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2435 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2436 | |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 2437 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2438 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2439 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2440 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2441 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2442 | |
| 2443 | return true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2444 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2445 | EXPORT_SYMBOL(transport_wait_for_tasks); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2446 | |
| 2447 | static int transport_get_sense_codes( |
| 2448 | struct se_cmd *cmd, |
| 2449 | u8 *asc, |
| 2450 | u8 *ascq) |
| 2451 | { |
| 2452 | *asc = cmd->scsi_asc; |
| 2453 | *ascq = cmd->scsi_ascq; |
| 2454 | |
| 2455 | return 0; |
| 2456 | } |
| 2457 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2458 | int |
| 2459 | transport_send_check_condition_and_sense(struct se_cmd *cmd, |
| 2460 | sense_reason_t reason, int from_transport) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2461 | { |
| 2462 | unsigned char *buffer = cmd->sense_buffer; |
| 2463 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2464 | u8 asc = 0, ascq = 0; |
| 2465 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2466 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2467 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2468 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2469 | return 0; |
| 2470 | } |
| 2471 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2472 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2473 | |
| 2474 | if (!reason && from_transport) |
| 2475 | goto after_reason; |
| 2476 | |
| 2477 | if (!from_transport) |
| 2478 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2479 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2480 | /* |
| 2481 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses |
| 2482 | * SENSE KEY values from include/scsi/scsi.h |
| 2483 | */ |
| 2484 | switch (reason) { |
Hannes Reinecke | ba82913 | 2012-12-17 09:53:33 +0100 | [diff] [blame] | 2485 | case TCM_NO_SENSE: |
| 2486 | /* CURRENT ERROR */ |
| 2487 | buffer[0] = 0x70; |
| 2488 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2489 | /* Not Ready */ |
| 2490 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
| 2491 | /* NO ADDITIONAL SENSE INFORMATION */ |
| 2492 | buffer[SPC_ASC_KEY_OFFSET] = 0; |
| 2493 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; |
| 2494 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2495 | case TCM_NON_EXISTENT_LUN: |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2496 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2497 | buffer[0] = 0x70; |
| 2498 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2499 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2500 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2501 | /* LOGICAL UNIT NOT SUPPORTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2502 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2503 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2504 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 2505 | case TCM_SECTOR_COUNT_TOO_MANY: |
| 2506 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2507 | buffer[0] = 0x70; |
| 2508 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2509 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2510 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2511 | /* INVALID COMMAND OPERATION CODE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2512 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2513 | break; |
| 2514 | case TCM_UNKNOWN_MODE_PAGE: |
| 2515 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2516 | buffer[0] = 0x70; |
| 2517 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2518 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2519 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2520 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2521 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2522 | break; |
| 2523 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 2524 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2525 | buffer[0] = 0x70; |
| 2526 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2527 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2528 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2529 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2530 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
| 2531 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2532 | break; |
| 2533 | case TCM_INCORRECT_AMOUNT_OF_DATA: |
| 2534 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2535 | buffer[0] = 0x70; |
| 2536 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2537 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2538 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2539 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2540 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2541 | /* NOT ENOUGH UNSOLICITED DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2542 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2543 | break; |
| 2544 | case TCM_INVALID_CDB_FIELD: |
| 2545 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2546 | buffer[0] = 0x70; |
| 2547 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2548 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2549 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2550 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2551 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2552 | break; |
| 2553 | case TCM_INVALID_PARAMETER_LIST: |
| 2554 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2555 | buffer[0] = 0x70; |
| 2556 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2557 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2558 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2559 | /* INVALID FIELD IN PARAMETER LIST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2560 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2561 | break; |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 2562 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
| 2563 | /* CURRENT ERROR */ |
| 2564 | buffer[0] = 0x70; |
| 2565 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2566 | /* ILLEGAL REQUEST */ |
| 2567 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2568 | /* PARAMETER LIST LENGTH ERROR */ |
| 2569 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; |
| 2570 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2571 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
| 2572 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2573 | buffer[0] = 0x70; |
| 2574 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2575 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2576 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2577 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2578 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2579 | /* UNEXPECTED_UNSOLICITED_DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2580 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2581 | break; |
| 2582 | case TCM_SERVICE_CRC_ERROR: |
| 2583 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2584 | buffer[0] = 0x70; |
| 2585 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2586 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2587 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2588 | /* PROTOCOL SERVICE CRC ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2589 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2590 | /* N/A */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2591 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2592 | break; |
| 2593 | case TCM_SNACK_REJECTED: |
| 2594 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2595 | buffer[0] = 0x70; |
| 2596 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2597 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2598 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2599 | /* READ ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2600 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2601 | /* FAILED RETRANSMISSION REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2602 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2603 | break; |
| 2604 | case TCM_WRITE_PROTECTED: |
| 2605 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2606 | buffer[0] = 0x70; |
| 2607 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2608 | /* DATA PROTECT */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2609 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2610 | /* WRITE PROTECTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2611 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2612 | break; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2613 | case TCM_ADDRESS_OUT_OF_RANGE: |
| 2614 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2615 | buffer[0] = 0x70; |
| 2616 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2617 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2618 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2619 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2620 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2621 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2622 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 2623 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2624 | buffer[0] = 0x70; |
| 2625 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2626 | /* UNIT ATTENTION */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2627 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2628 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2629 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2630 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2631 | break; |
| 2632 | case TCM_CHECK_CONDITION_NOT_READY: |
| 2633 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2634 | buffer[0] = 0x70; |
| 2635 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2636 | /* Not Ready */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2637 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2638 | transport_get_sense_codes(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2639 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2640 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2641 | break; |
Nicholas Bellinger | 818b571 | 2013-08-19 15:10:38 -0700 | [diff] [blame] | 2642 | case TCM_MISCOMPARE_VERIFY: |
| 2643 | /* CURRENT ERROR */ |
| 2644 | buffer[0] = 0x70; |
| 2645 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2646 | buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE; |
| 2647 | /* MISCOMPARE DURING VERIFY OPERATION */ |
| 2648 | buffer[SPC_ASC_KEY_OFFSET] = 0x1d; |
| 2649 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x00; |
| 2650 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2651 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 2652 | default: |
| 2653 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2654 | buffer[0] = 0x70; |
| 2655 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Jörn Engel | ad67328 | 2013-03-18 18:30:31 -0400 | [diff] [blame] | 2656 | /* |
| 2657 | * Returning ILLEGAL REQUEST would cause immediate IO errors on |
| 2658 | * Solaris initiators. Returning NOT READY instead means the |
| 2659 | * operations will be retried a finite number of times and we |
| 2660 | * can survive intermittent errors. |
| 2661 | */ |
| 2662 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2663 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
Hannes Reinecke | 18a9df4 | 2012-12-17 09:53:32 +0100 | [diff] [blame] | 2664 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2665 | break; |
| 2666 | } |
| 2667 | /* |
| 2668 | * This code uses linux/include/scsi/scsi.h SAM status codes! |
| 2669 | */ |
| 2670 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; |
| 2671 | /* |
| 2672 | * Automatically padded, this value is encoded in the fabric's |
| 2673 | * data_length response PDU containing the SCSI defined sense data. |
| 2674 | */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2675 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2676 | |
| 2677 | after_reason: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2678 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2679 | return cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2680 | } |
| 2681 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); |
| 2682 | |
| 2683 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) |
| 2684 | { |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2685 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
| 2686 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2687 | |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2688 | if (!send_status || (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
| 2689 | return 1; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2690 | |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2691 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n", |
| 2692 | cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2693 | |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2694 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2695 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2696 | trace_target_cmd_complete(cmd); |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2697 | cmd->se_tfo->queue_status(cmd); |
| 2698 | |
| 2699 | return 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2700 | } |
| 2701 | EXPORT_SYMBOL(transport_check_aborted_status); |
| 2702 | |
| 2703 | void transport_send_task_abort(struct se_cmd *cmd) |
| 2704 | { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2705 | unsigned long flags; |
| 2706 | |
| 2707 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Roland Dreier | 3ea160b | 2012-11-16 08:06:16 -0800 | [diff] [blame] | 2708 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION | SCF_SENT_DELAYED_TAS)) { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2709 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2710 | return; |
| 2711 | } |
| 2712 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2713 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2714 | /* |
| 2715 | * If there are still expected incoming fabric WRITEs, we wait |
| 2716 | * until until they have completed before sending a TASK_ABORTED |
| 2717 | * response. This response with TASK_ABORTED status will be |
| 2718 | * queued back to fabric module by transport_check_aborted_status(). |
| 2719 | */ |
| 2720 | if (cmd->data_direction == DMA_TO_DEVICE) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2721 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2722 | cmd->transport_state |= CMD_T_ABORTED; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2723 | smp_mb__after_atomic_inc(); |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2724 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2725 | } |
| 2726 | } |
| 2727 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2728 | |
Roland Dreier | 72b59d6e | 2013-01-02 12:47:58 -0800 | [diff] [blame] | 2729 | transport_lun_remove_cmd(cmd); |
| 2730 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2731 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2732 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2733 | cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2734 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2735 | trace_target_cmd_complete(cmd); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2736 | cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2737 | } |
| 2738 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2739 | static void target_tmr_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2740 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2741 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2742 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2743 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
| 2744 | int ret; |
| 2745 | |
| 2746 | switch (tmr->function) { |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2747 | case TMR_ABORT_TASK: |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2748 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2749 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2750 | case TMR_ABORT_TASK_SET: |
| 2751 | case TMR_CLEAR_ACA: |
| 2752 | case TMR_CLEAR_TASK_SET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2753 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
| 2754 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2755 | case TMR_LUN_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2756 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
| 2757 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : |
| 2758 | TMR_FUNCTION_REJECTED; |
| 2759 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2760 | case TMR_TARGET_WARM_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2761 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2762 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2763 | case TMR_TARGET_COLD_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2764 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2765 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2766 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2767 | pr_err("Uknown TMR function: 0x%02x.\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2768 | tmr->function); |
| 2769 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2770 | break; |
| 2771 | } |
| 2772 | |
| 2773 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2774 | cmd->se_tfo->queue_tm_rsp(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2775 | |
Christoph Hellwig | b7b8bef | 2011-10-17 13:56:44 -0400 | [diff] [blame] | 2776 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2777 | } |
| 2778 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2779 | int transport_generic_handle_tmr( |
| 2780 | struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2781 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2782 | INIT_WORK(&cmd->work, target_tmr_work); |
| 2783 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2784 | return 0; |
| 2785 | } |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2786 | EXPORT_SYMBOL(transport_generic_handle_tmr); |