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; |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 65 | struct kmem_cache *t10_alua_lba_map_cache; |
| 66 | struct kmem_cache *t10_alua_lba_map_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 68 | static void transport_complete_task_attr(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 69 | static void transport_handle_queue_full(struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 70 | struct se_device *dev); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 71 | static int transport_put_cmd(struct se_cmd *cmd); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 72 | static void target_complete_ok_work(struct work_struct *work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 73 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 74 | int init_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 75 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | se_sess_cache = kmem_cache_create("se_sess_cache", |
| 77 | sizeof(struct se_session), __alignof__(struct se_session), |
| 78 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 79 | if (!se_sess_cache) { |
| 80 | pr_err("kmem_cache_create() for struct se_session" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 81 | " failed\n"); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 82 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 83 | } |
| 84 | se_ua_cache = kmem_cache_create("se_ua_cache", |
| 85 | sizeof(struct se_ua), __alignof__(struct se_ua), |
| 86 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 87 | if (!se_ua_cache) { |
| 88 | pr_err("kmem_cache_create() for struct se_ua failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 89 | goto out_free_sess_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 90 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 91 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
| 92 | sizeof(struct t10_pr_registration), |
| 93 | __alignof__(struct t10_pr_registration), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 94 | if (!t10_pr_reg_cache) { |
| 95 | pr_err("kmem_cache_create() for struct t10_pr_registration" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 97 | goto out_free_ua_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 98 | } |
| 99 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", |
| 100 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), |
| 101 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 102 | if (!t10_alua_lu_gp_cache) { |
| 103 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 104 | " failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 105 | goto out_free_pr_reg_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 106 | } |
| 107 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", |
| 108 | sizeof(struct t10_alua_lu_gp_member), |
| 109 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 110 | if (!t10_alua_lu_gp_mem_cache) { |
| 111 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 112 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 113 | goto out_free_lu_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 114 | } |
| 115 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", |
| 116 | sizeof(struct t10_alua_tg_pt_gp), |
| 117 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 118 | if (!t10_alua_tg_pt_gp_cache) { |
| 119 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 120 | "cache failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 121 | goto out_free_lu_gp_mem_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 122 | } |
| 123 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( |
| 124 | "t10_alua_tg_pt_gp_mem_cache", |
| 125 | sizeof(struct t10_alua_tg_pt_gp_member), |
| 126 | __alignof__(struct t10_alua_tg_pt_gp_member), |
| 127 | 0, NULL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 128 | if (!t10_alua_tg_pt_gp_mem_cache) { |
| 129 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 130 | "mem_t failed\n"); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 131 | goto out_free_tg_pt_gp_cache; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 132 | } |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 133 | t10_alua_lba_map_cache = kmem_cache_create( |
| 134 | "t10_alua_lba_map_cache", |
| 135 | sizeof(struct t10_alua_lba_map), |
| 136 | __alignof__(struct t10_alua_lba_map), 0, NULL); |
| 137 | if (!t10_alua_lba_map_cache) { |
| 138 | pr_err("kmem_cache_create() for t10_alua_lba_map_" |
| 139 | "cache failed\n"); |
| 140 | goto out_free_tg_pt_gp_mem_cache; |
| 141 | } |
| 142 | t10_alua_lba_map_mem_cache = kmem_cache_create( |
| 143 | "t10_alua_lba_map_mem_cache", |
| 144 | sizeof(struct t10_alua_lba_map_member), |
| 145 | __alignof__(struct t10_alua_lba_map_member), 0, NULL); |
| 146 | if (!t10_alua_lba_map_mem_cache) { |
| 147 | pr_err("kmem_cache_create() for t10_alua_lba_map_mem_" |
| 148 | "cache failed\n"); |
| 149 | goto out_free_lba_map_cache; |
| 150 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 151 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 152 | target_completion_wq = alloc_workqueue("target_completion", |
| 153 | WQ_MEM_RECLAIM, 0); |
| 154 | if (!target_completion_wq) |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 155 | goto out_free_lba_map_mem_cache; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 156 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 157 | return 0; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 158 | |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 159 | out_free_lba_map_mem_cache: |
| 160 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); |
| 161 | out_free_lba_map_cache: |
| 162 | kmem_cache_destroy(t10_alua_lba_map_cache); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 163 | out_free_tg_pt_gp_mem_cache: |
| 164 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
| 165 | out_free_tg_pt_gp_cache: |
| 166 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 167 | out_free_lu_gp_mem_cache: |
| 168 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 169 | out_free_lu_gp_cache: |
| 170 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 171 | out_free_pr_reg_cache: |
| 172 | kmem_cache_destroy(t10_pr_reg_cache); |
| 173 | out_free_ua_cache: |
| 174 | kmem_cache_destroy(se_ua_cache); |
| 175 | out_free_sess_cache: |
| 176 | kmem_cache_destroy(se_sess_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 177 | out: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 178 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 179 | } |
| 180 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 181 | void release_se_kmem_caches(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 182 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 183 | destroy_workqueue(target_completion_wq); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 184 | kmem_cache_destroy(se_sess_cache); |
| 185 | kmem_cache_destroy(se_ua_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 186 | kmem_cache_destroy(t10_pr_reg_cache); |
| 187 | kmem_cache_destroy(t10_alua_lu_gp_cache); |
| 188 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); |
| 189 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); |
| 190 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); |
Hannes Reinecke | 229d4f1 | 2013-12-17 09:18:50 +0100 | [diff] [blame] | 191 | kmem_cache_destroy(t10_alua_lba_map_cache); |
| 192 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 193 | } |
| 194 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 195 | /* This code ensures unique mib indexes are handed out. */ |
| 196 | static DEFINE_SPINLOCK(scsi_mib_index_lock); |
| 197 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 198 | |
| 199 | /* |
| 200 | * Allocate a new row index for the entry type specified |
| 201 | */ |
| 202 | u32 scsi_get_new_index(scsi_index_t type) |
| 203 | { |
| 204 | u32 new_index; |
| 205 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 206 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 207 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 208 | spin_lock(&scsi_mib_index_lock); |
| 209 | new_index = ++scsi_mib_index[type]; |
| 210 | spin_unlock(&scsi_mib_index_lock); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 211 | |
| 212 | return new_index; |
| 213 | } |
| 214 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 215 | void transport_subsystem_check_init(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 216 | { |
| 217 | int ret; |
Andy Grover | 283669d | 2012-07-30 15:54:17 -0700 | [diff] [blame] | 218 | static int sub_api_initialized; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 219 | |
Nicholas Bellinger | dbc5623 | 2011-10-22 01:03:54 -0700 | [diff] [blame] | 220 | if (sub_api_initialized) |
| 221 | return; |
| 222 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 223 | ret = request_module("target_core_iblock"); |
| 224 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 225 | pr_err("Unable to load target_core_iblock\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 226 | |
| 227 | ret = request_module("target_core_file"); |
| 228 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 229 | pr_err("Unable to load target_core_file\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 230 | |
| 231 | ret = request_module("target_core_pscsi"); |
| 232 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 233 | pr_err("Unable to load target_core_pscsi\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 234 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 235 | sub_api_initialized = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | struct se_session *transport_init_session(void) |
| 239 | { |
| 240 | struct se_session *se_sess; |
| 241 | |
| 242 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 243 | if (!se_sess) { |
| 244 | pr_err("Unable to allocate struct se_session from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 245 | " se_sess_cache\n"); |
| 246 | return ERR_PTR(-ENOMEM); |
| 247 | } |
| 248 | INIT_LIST_HEAD(&se_sess->sess_list); |
| 249 | INIT_LIST_HEAD(&se_sess->sess_acl_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 250 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 251 | INIT_LIST_HEAD(&se_sess->sess_wait_list); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 252 | spin_lock_init(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 253 | kref_init(&se_sess->sess_kref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 254 | |
| 255 | return se_sess; |
| 256 | } |
| 257 | EXPORT_SYMBOL(transport_init_session); |
| 258 | |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 259 | int transport_alloc_session_tags(struct se_session *se_sess, |
| 260 | unsigned int tag_num, unsigned int tag_size) |
| 261 | { |
| 262 | int rc; |
| 263 | |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 264 | se_sess->sess_cmd_map = kzalloc(tag_num * tag_size, |
| 265 | GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 266 | if (!se_sess->sess_cmd_map) { |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 267 | se_sess->sess_cmd_map = vzalloc(tag_num * tag_size); |
| 268 | if (!se_sess->sess_cmd_map) { |
| 269 | pr_err("Unable to allocate se_sess->sess_cmd_map\n"); |
| 270 | return -ENOMEM; |
| 271 | } |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); |
| 275 | if (rc < 0) { |
| 276 | pr_err("Unable to init se_sess->sess_tag_pool," |
| 277 | " tag_num: %u\n", tag_num); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 278 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 279 | vfree(se_sess->sess_cmd_map); |
| 280 | else |
| 281 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 282 | se_sess->sess_cmd_map = NULL; |
| 283 | return -ENOMEM; |
| 284 | } |
| 285 | |
| 286 | return 0; |
| 287 | } |
| 288 | EXPORT_SYMBOL(transport_alloc_session_tags); |
| 289 | |
| 290 | struct se_session *transport_init_session_tags(unsigned int tag_num, |
| 291 | unsigned int tag_size) |
| 292 | { |
| 293 | struct se_session *se_sess; |
| 294 | int rc; |
| 295 | |
| 296 | se_sess = transport_init_session(); |
| 297 | if (IS_ERR(se_sess)) |
| 298 | return se_sess; |
| 299 | |
| 300 | rc = transport_alloc_session_tags(se_sess, tag_num, tag_size); |
| 301 | if (rc < 0) { |
| 302 | transport_free_session(se_sess); |
| 303 | return ERR_PTR(-ENOMEM); |
| 304 | } |
| 305 | |
| 306 | return se_sess; |
| 307 | } |
| 308 | EXPORT_SYMBOL(transport_init_session_tags); |
| 309 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 310 | /* |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 311 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 312 | */ |
| 313 | void __transport_register_session( |
| 314 | struct se_portal_group *se_tpg, |
| 315 | struct se_node_acl *se_nacl, |
| 316 | struct se_session *se_sess, |
| 317 | void *fabric_sess_ptr) |
| 318 | { |
| 319 | unsigned char buf[PR_REG_ISID_LEN]; |
| 320 | |
| 321 | se_sess->se_tpg = se_tpg; |
| 322 | se_sess->fabric_sess_ptr = fabric_sess_ptr; |
| 323 | /* |
| 324 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t |
| 325 | * |
| 326 | * Only set for struct se_session's that will actually be moving I/O. |
| 327 | * eg: *NOT* discovery sessions. |
| 328 | */ |
| 329 | if (se_nacl) { |
| 330 | /* |
| 331 | * If the fabric module supports an ISID based TransportID, |
| 332 | * save this value in binary from the fabric I_T Nexus now. |
| 333 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 334 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 335 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 336 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 337 | &buf[0], PR_REG_ISID_LEN); |
| 338 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); |
| 339 | } |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 340 | kref_get(&se_nacl->acl_kref); |
| 341 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 342 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
| 343 | /* |
| 344 | * The se_nacl->nacl_sess pointer will be set to the |
| 345 | * last active I_T Nexus for each struct se_node_acl. |
| 346 | */ |
| 347 | se_nacl->nacl_sess = se_sess; |
| 348 | |
| 349 | list_add_tail(&se_sess->sess_acl_list, |
| 350 | &se_nacl->acl_sess_list); |
| 351 | spin_unlock_irq(&se_nacl->nacl_sess_lock); |
| 352 | } |
| 353 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); |
| 354 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 355 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 356 | 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] | 357 | } |
| 358 | EXPORT_SYMBOL(__transport_register_session); |
| 359 | |
| 360 | void transport_register_session( |
| 361 | struct se_portal_group *se_tpg, |
| 362 | struct se_node_acl *se_nacl, |
| 363 | struct se_session *se_sess, |
| 364 | void *fabric_sess_ptr) |
| 365 | { |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 366 | unsigned long flags; |
| 367 | |
| 368 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 369 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
Nicholas Bellinger | 140854c | 2011-08-31 12:34:39 -0700 | [diff] [blame] | 370 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 371 | } |
| 372 | EXPORT_SYMBOL(transport_register_session); |
| 373 | |
Fengguang Wu | ecf0dd6 | 2012-10-10 07:30:20 +0800 | [diff] [blame] | 374 | static void target_release_session(struct kref *kref) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 375 | { |
| 376 | struct se_session *se_sess = container_of(kref, |
| 377 | struct se_session, sess_kref); |
| 378 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
| 379 | |
| 380 | se_tpg->se_tpg_tfo->close_session(se_sess); |
| 381 | } |
| 382 | |
| 383 | void target_get_session(struct se_session *se_sess) |
| 384 | { |
| 385 | kref_get(&se_sess->sess_kref); |
| 386 | } |
| 387 | EXPORT_SYMBOL(target_get_session); |
| 388 | |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 389 | void target_put_session(struct se_session *se_sess) |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 390 | { |
Joern Engel | 4149268 | 2012-05-18 13:57:19 -0700 | [diff] [blame] | 391 | struct se_portal_group *tpg = se_sess->se_tpg; |
| 392 | |
| 393 | if (tpg->se_tpg_tfo->put_session != NULL) { |
| 394 | tpg->se_tpg_tfo->put_session(se_sess); |
| 395 | return; |
| 396 | } |
Jörn Engel | 33933a0 | 2012-05-11 10:35:08 -0400 | [diff] [blame] | 397 | kref_put(&se_sess->sess_kref, target_release_session); |
Nicholas Bellinger | 41ac82b | 2012-02-26 22:22:10 -0800 | [diff] [blame] | 398 | } |
| 399 | EXPORT_SYMBOL(target_put_session); |
| 400 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 401 | static void target_complete_nacl(struct kref *kref) |
| 402 | { |
| 403 | struct se_node_acl *nacl = container_of(kref, |
| 404 | struct se_node_acl, acl_kref); |
| 405 | |
| 406 | complete(&nacl->acl_free_comp); |
| 407 | } |
| 408 | |
| 409 | void target_put_nacl(struct se_node_acl *nacl) |
| 410 | { |
| 411 | kref_put(&nacl->acl_kref, target_complete_nacl); |
| 412 | } |
| 413 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 414 | void transport_deregister_session_configfs(struct se_session *se_sess) |
| 415 | { |
| 416 | struct se_node_acl *se_nacl; |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 417 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 418 | /* |
| 419 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session |
| 420 | */ |
| 421 | se_nacl = se_sess->se_node_acl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 422 | if (se_nacl) { |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 423 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 424 | if (se_nacl->acl_stop == 0) |
| 425 | list_del(&se_sess->sess_acl_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | /* |
| 427 | * If the session list is empty, then clear the pointer. |
| 428 | * Otherwise, set the struct se_session pointer from the tail |
| 429 | * element of the per struct se_node_acl active session list. |
| 430 | */ |
| 431 | if (list_empty(&se_nacl->acl_sess_list)) |
| 432 | se_nacl->nacl_sess = NULL; |
| 433 | else { |
| 434 | se_nacl->nacl_sess = container_of( |
| 435 | se_nacl->acl_sess_list.prev, |
| 436 | struct se_session, sess_acl_list); |
| 437 | } |
Roland Dreier | 2338886 | 2011-06-22 01:02:21 -0700 | [diff] [blame] | 438 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 439 | } |
| 440 | } |
| 441 | EXPORT_SYMBOL(transport_deregister_session_configfs); |
| 442 | |
| 443 | void transport_free_session(struct se_session *se_sess) |
| 444 | { |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 445 | if (se_sess->sess_cmd_map) { |
| 446 | percpu_ida_destroy(&se_sess->sess_tag_pool); |
Nicholas Bellinger | 8c7f6e9 | 2013-09-23 11:57:38 -0700 | [diff] [blame] | 447 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
| 448 | vfree(se_sess->sess_cmd_map); |
| 449 | else |
| 450 | kfree(se_sess->sess_cmd_map); |
Nicholas Bellinger | c0add7f | 2013-06-07 17:38:58 -0700 | [diff] [blame] | 451 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 452 | kmem_cache_free(se_sess_cache, se_sess); |
| 453 | } |
| 454 | EXPORT_SYMBOL(transport_free_session); |
| 455 | |
| 456 | void transport_deregister_session(struct se_session *se_sess) |
| 457 | { |
| 458 | struct se_portal_group *se_tpg = se_sess->se_tpg; |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 459 | struct target_core_fabric_ops *se_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 460 | struct se_node_acl *se_nacl; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 461 | unsigned long flags; |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 462 | bool comp_nacl = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 463 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 464 | if (!se_tpg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 465 | transport_free_session(se_sess); |
| 466 | return; |
| 467 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 468 | se_tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 469 | |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 470 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 471 | list_del(&se_sess->sess_list); |
| 472 | se_sess->se_tpg = NULL; |
| 473 | se_sess->fabric_sess_ptr = NULL; |
Roland Dreier | e63a8e1 | 2011-08-12 16:01:02 -0700 | [diff] [blame] | 474 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 475 | |
| 476 | /* |
| 477 | * Determine if we need to do extra work for this initiator node's |
| 478 | * struct se_node_acl if it had been previously dynamically generated. |
| 479 | */ |
| 480 | se_nacl = se_sess->se_node_acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 481 | |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 482 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
| 483 | if (se_nacl && se_nacl->dynamic_node_acl) { |
| 484 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { |
| 485 | list_del(&se_nacl->acl_list); |
| 486 | se_tpg->num_node_acls--; |
| 487 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
| 488 | core_tpg_wait_for_nacl_pr_ref(se_nacl); |
| 489 | core_free_device_list_for_node(se_nacl, se_tpg); |
| 490 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); |
| 491 | |
| 492 | comp_nacl = false; |
| 493 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 494 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 495 | } |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 496 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 497 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 498 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 499 | se_tpg->se_tpg_tfo->get_fabric_name()); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 500 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 501 | * If last kref is dropping now for an explicit NodeACL, awake sleeping |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 502 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
| 503 | * removal context. |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 504 | */ |
| 505 | if (se_nacl && comp_nacl == true) |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 506 | target_put_nacl(se_nacl); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 507 | |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 508 | transport_free_session(se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 509 | } |
| 510 | EXPORT_SYMBOL(transport_deregister_session); |
| 511 | |
| 512 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 513 | * Called with cmd->t_state_lock held. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 514 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 515 | static void target_remove_from_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 516 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 517 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 518 | unsigned long flags; |
| 519 | |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 520 | if (!dev) |
| 521 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 522 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 523 | if (cmd->transport_state & CMD_T_BUSY) |
| 524 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 525 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 526 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 527 | if (cmd->state_active) { |
| 528 | list_del(&cmd->state_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 529 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 530 | } |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 531 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 532 | } |
| 533 | |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 534 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
| 535 | bool write_pending) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 536 | { |
| 537 | unsigned long flags; |
| 538 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 539 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 540 | if (write_pending) |
| 541 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
| 542 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 543 | if (remove_from_lists) { |
| 544 | target_remove_from_state_list(cmd); |
| 545 | |
| 546 | /* |
| 547 | * Clear struct se_cmd->se_lun before the handoff to FE. |
| 548 | */ |
| 549 | cmd->se_lun = NULL; |
| 550 | } |
| 551 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 552 | /* |
| 553 | * Determine if frontend context caller is requesting the stopping of |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 554 | * this command for frontend exceptions. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 555 | */ |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 556 | if (cmd->transport_state & CMD_T_STOP) { |
| 557 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", |
| 558 | __func__, __LINE__, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 559 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 560 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 561 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 562 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 563 | complete(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 564 | return 1; |
| 565 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 566 | |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 567 | cmd->transport_state &= ~CMD_T_ACTIVE; |
| 568 | if (remove_from_lists) { |
| 569 | /* |
| 570 | * Some fabric modules like tcm_loop can release |
| 571 | * their internally allocated I/O reference now and |
| 572 | * struct se_cmd now. |
| 573 | * |
| 574 | * Fabric modules are expected to return '1' here if the |
| 575 | * se_cmd being passed is released at this point, |
| 576 | * or zero if not being released. |
| 577 | */ |
| 578 | if (cmd->se_tfo->check_stop_free != NULL) { |
| 579 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 580 | return cmd->se_tfo->check_stop_free(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 581 | } |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 582 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 583 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 584 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) |
| 589 | { |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 590 | return transport_cmd_check_stop(cmd, true, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 591 | } |
| 592 | |
| 593 | static void transport_lun_remove_cmd(struct se_cmd *cmd) |
| 594 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 595 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 596 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 597 | if (!lun || !cmd->lun_ref_active) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 598 | return; |
| 599 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 600 | percpu_ref_put(&lun->lun_ref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 601 | } |
| 602 | |
| 603 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) |
| 604 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 605 | if (transport_cmd_check_stop_to_fabric(cmd)) |
| 606 | return; |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 607 | if (remove) |
Christoph Hellwig | e6a2573 | 2011-09-13 23:08:50 +0200 | [diff] [blame] | 608 | transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 609 | } |
| 610 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 611 | static void target_complete_failure_work(struct work_struct *work) |
| 612 | { |
| 613 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
| 614 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 615 | transport_generic_request_failure(cmd, |
| 616 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 617 | } |
| 618 | |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 619 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 620 | * Used when asking transport to copy Sense Data from the underlying |
| 621 | * Linux/SCSI struct scsi_cmnd |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 622 | */ |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 623 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 624 | { |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 625 | struct se_device *dev = cmd->se_dev; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 626 | |
| 627 | WARN_ON(!cmd->se_lun); |
| 628 | |
| 629 | if (!dev) |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 630 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 631 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 632 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
| 633 | return NULL; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 634 | |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 635 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 636 | |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 637 | 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] | 638 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 639 | return cmd->sense_buffer; |
Paolo Bonzini | 6138ed2 | 2012-09-05 17:09:13 +0200 | [diff] [blame] | 640 | } |
| 641 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 642 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 643 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 644 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 645 | int success = scsi_status == GOOD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 646 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 647 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 648 | cmd->scsi_status = scsi_status; |
| 649 | |
| 650 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 651 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 652 | cmd->transport_state &= ~CMD_T_BUSY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 653 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 654 | if (dev && dev->transport->transport_complete) { |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 655 | dev->transport->transport_complete(cmd, |
| 656 | cmd->t_data_sg, |
| 657 | transport_get_sense_buffer(cmd)); |
| 658 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 659 | success = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | /* |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 663 | * See if we are waiting to complete for an exception condition. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 664 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 665 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 666 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 667 | complete(&cmd->task_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 668 | return; |
| 669 | } |
Christoph Hellwig | 2235007c | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 670 | |
| 671 | if (!success) |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 672 | cmd->transport_state |= CMD_T_FAILED; |
Christoph Hellwig | 2235007c | 2011-11-02 05:06:35 -0700 | [diff] [blame] | 673 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 674 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 675 | * Check for case where an explicit ABORT_TASK has been received |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 676 | * and transport_wait_for_tasks() will be waiting for completion.. |
| 677 | */ |
| 678 | if (cmd->transport_state & CMD_T_ABORTED && |
| 679 | cmd->transport_state & CMD_T_STOP) { |
| 680 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 681 | complete(&cmd->t_transport_stop_comp); |
| 682 | return; |
| 683 | } else if (cmd->transport_state & CMD_T_FAILED) { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 684 | INIT_WORK(&cmd->work, target_complete_failure_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 685 | } else { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 686 | INIT_WORK(&cmd->work, target_complete_ok_work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 687 | } |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 688 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 689 | cmd->t_state = TRANSPORT_COMPLETE; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 690 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 691 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 692 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 693 | queue_work(target_completion_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 694 | } |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 695 | EXPORT_SYMBOL(target_complete_cmd); |
| 696 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 697 | static void target_add_to_state_list(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 698 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 699 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 700 | unsigned long flags; |
| 701 | |
Nicholas Bellinger | 4d2300c | 2011-11-30 18:18:33 -0800 | [diff] [blame] | 702 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 703 | if (!cmd->state_active) { |
| 704 | list_add_tail(&cmd->state_list, &dev->state_list); |
| 705 | cmd->state_active = true; |
| 706 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 707 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 708 | } |
| 709 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 710 | /* |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 711 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 712 | */ |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 713 | static void transport_write_pending_qf(struct se_cmd *cmd); |
| 714 | static void transport_complete_qf(struct se_cmd *cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 715 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 716 | void target_qf_do_work(struct work_struct *work) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 717 | { |
| 718 | struct se_device *dev = container_of(work, struct se_device, |
| 719 | qf_work_queue); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 720 | LIST_HEAD(qf_cmd_list); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 721 | struct se_cmd *cmd, *cmd_tmp; |
| 722 | |
| 723 | spin_lock_irq(&dev->qf_cmd_lock); |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 724 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
| 725 | spin_unlock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 726 | |
Roland Dreier | bcac364 | 2011-08-27 21:33:16 -0700 | [diff] [blame] | 727 | 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] | 728 | list_del(&cmd->se_qf_node); |
| 729 | atomic_dec(&dev->dev_qf_count); |
| 730 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 731 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 732 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 733 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 734 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 735 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
| 736 | : "UNKNOWN"); |
Christoph Hellwig | f7a5cc0 | 2011-10-17 13:56:42 -0400 | [diff] [blame] | 737 | |
Christoph Hellwig | 7a6f0a1 | 2012-07-08 15:58:47 -0400 | [diff] [blame] | 738 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
| 739 | transport_write_pending_qf(cmd); |
| 740 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) |
| 741 | transport_complete_qf(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 742 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 743 | } |
| 744 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 745 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
| 746 | { |
| 747 | switch (cmd->data_direction) { |
| 748 | case DMA_NONE: |
| 749 | return "NONE"; |
| 750 | case DMA_FROM_DEVICE: |
| 751 | return "READ"; |
| 752 | case DMA_TO_DEVICE: |
| 753 | return "WRITE"; |
| 754 | case DMA_BIDIRECTIONAL: |
| 755 | return "BIDI"; |
| 756 | default: |
| 757 | break; |
| 758 | } |
| 759 | |
| 760 | return "UNKNOWN"; |
| 761 | } |
| 762 | |
| 763 | void transport_dump_dev_state( |
| 764 | struct se_device *dev, |
| 765 | char *b, |
| 766 | int *bl) |
| 767 | { |
| 768 | *bl += sprintf(b + *bl, "Status: "); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 769 | if (dev->export_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 770 | *bl += sprintf(b + *bl, "ACTIVATED"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 771 | else |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 772 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 773 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 774 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
Nicholas Bellinger | 11e764b | 2012-05-09 12:42:09 -0700 | [diff] [blame] | 775 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 776 | dev->dev_attrib.block_size, |
| 777 | dev->dev_attrib.hw_max_sectors); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 778 | *bl += sprintf(b + *bl, " "); |
| 779 | } |
| 780 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 781 | void transport_dump_vpd_proto_id( |
| 782 | struct t10_vpd *vpd, |
| 783 | unsigned char *p_buf, |
| 784 | int p_buf_len) |
| 785 | { |
| 786 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 787 | int len; |
| 788 | |
| 789 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 790 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); |
| 791 | |
| 792 | switch (vpd->protocol_identifier) { |
| 793 | case 0x00: |
| 794 | sprintf(buf+len, "Fibre Channel\n"); |
| 795 | break; |
| 796 | case 0x10: |
| 797 | sprintf(buf+len, "Parallel SCSI\n"); |
| 798 | break; |
| 799 | case 0x20: |
| 800 | sprintf(buf+len, "SSA\n"); |
| 801 | break; |
| 802 | case 0x30: |
| 803 | sprintf(buf+len, "IEEE 1394\n"); |
| 804 | break; |
| 805 | case 0x40: |
| 806 | sprintf(buf+len, "SCSI Remote Direct Memory Access" |
| 807 | " Protocol\n"); |
| 808 | break; |
| 809 | case 0x50: |
| 810 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); |
| 811 | break; |
| 812 | case 0x60: |
| 813 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); |
| 814 | break; |
| 815 | case 0x70: |
| 816 | sprintf(buf+len, "Automation/Drive Interface Transport" |
| 817 | " Protocol\n"); |
| 818 | break; |
| 819 | case 0x80: |
| 820 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); |
| 821 | break; |
| 822 | default: |
| 823 | sprintf(buf+len, "Unknown 0x%02x\n", |
| 824 | vpd->protocol_identifier); |
| 825 | break; |
| 826 | } |
| 827 | |
| 828 | if (p_buf) |
| 829 | strncpy(p_buf, buf, p_buf_len); |
| 830 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 831 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | void |
| 835 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) |
| 836 | { |
| 837 | /* |
| 838 | * Check if the Protocol Identifier Valid (PIV) bit is set.. |
| 839 | * |
| 840 | * from spc3r23.pdf section 7.5.1 |
| 841 | */ |
| 842 | if (page_83[1] & 0x80) { |
| 843 | vpd->protocol_identifier = (page_83[0] & 0xf0); |
| 844 | vpd->protocol_identifier_set = 1; |
| 845 | transport_dump_vpd_proto_id(vpd, NULL, 0); |
| 846 | } |
| 847 | } |
| 848 | EXPORT_SYMBOL(transport_set_vpd_proto_id); |
| 849 | |
| 850 | int transport_dump_vpd_assoc( |
| 851 | struct t10_vpd *vpd, |
| 852 | unsigned char *p_buf, |
| 853 | int p_buf_len) |
| 854 | { |
| 855 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 856 | int ret = 0; |
| 857 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 858 | |
| 859 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 860 | len = sprintf(buf, "T10 VPD Identifier Association: "); |
| 861 | |
| 862 | switch (vpd->association) { |
| 863 | case 0x00: |
| 864 | sprintf(buf+len, "addressed logical unit\n"); |
| 865 | break; |
| 866 | case 0x10: |
| 867 | sprintf(buf+len, "target port\n"); |
| 868 | break; |
| 869 | case 0x20: |
| 870 | sprintf(buf+len, "SCSI target device\n"); |
| 871 | break; |
| 872 | default: |
| 873 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 874 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 875 | break; |
| 876 | } |
| 877 | |
| 878 | if (p_buf) |
| 879 | strncpy(p_buf, buf, p_buf_len); |
| 880 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 881 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 882 | |
| 883 | return ret; |
| 884 | } |
| 885 | |
| 886 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) |
| 887 | { |
| 888 | /* |
| 889 | * The VPD identification association.. |
| 890 | * |
| 891 | * from spc3r23.pdf Section 7.6.3.1 Table 297 |
| 892 | */ |
| 893 | vpd->association = (page_83[1] & 0x30); |
| 894 | return transport_dump_vpd_assoc(vpd, NULL, 0); |
| 895 | } |
| 896 | EXPORT_SYMBOL(transport_set_vpd_assoc); |
| 897 | |
| 898 | int transport_dump_vpd_ident_type( |
| 899 | struct t10_vpd *vpd, |
| 900 | unsigned char *p_buf, |
| 901 | int p_buf_len) |
| 902 | { |
| 903 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 904 | int ret = 0; |
| 905 | int len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 906 | |
| 907 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 908 | len = sprintf(buf, "T10 VPD Identifier Type: "); |
| 909 | |
| 910 | switch (vpd->device_identifier_type) { |
| 911 | case 0x00: |
| 912 | sprintf(buf+len, "Vendor specific\n"); |
| 913 | break; |
| 914 | case 0x01: |
| 915 | sprintf(buf+len, "T10 Vendor ID based\n"); |
| 916 | break; |
| 917 | case 0x02: |
| 918 | sprintf(buf+len, "EUI-64 based\n"); |
| 919 | break; |
| 920 | case 0x03: |
| 921 | sprintf(buf+len, "NAA\n"); |
| 922 | break; |
| 923 | case 0x04: |
| 924 | sprintf(buf+len, "Relative target port identifier\n"); |
| 925 | break; |
| 926 | case 0x08: |
| 927 | sprintf(buf+len, "SCSI name string\n"); |
| 928 | break; |
| 929 | default: |
| 930 | sprintf(buf+len, "Unsupported: 0x%02x\n", |
| 931 | vpd->device_identifier_type); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 932 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 933 | break; |
| 934 | } |
| 935 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 936 | if (p_buf) { |
| 937 | if (p_buf_len < strlen(buf)+1) |
| 938 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 939 | strncpy(p_buf, buf, p_buf_len); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 940 | } else { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 941 | pr_debug("%s", buf); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 942 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 943 | |
| 944 | return ret; |
| 945 | } |
| 946 | |
| 947 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) |
| 948 | { |
| 949 | /* |
| 950 | * The VPD identifier type.. |
| 951 | * |
| 952 | * from spc3r23.pdf Section 7.6.3.1 Table 298 |
| 953 | */ |
| 954 | vpd->device_identifier_type = (page_83[1] & 0x0f); |
| 955 | return transport_dump_vpd_ident_type(vpd, NULL, 0); |
| 956 | } |
| 957 | EXPORT_SYMBOL(transport_set_vpd_ident_type); |
| 958 | |
| 959 | int transport_dump_vpd_ident( |
| 960 | struct t10_vpd *vpd, |
| 961 | unsigned char *p_buf, |
| 962 | int p_buf_len) |
| 963 | { |
| 964 | unsigned char buf[VPD_TMP_BUF_SIZE]; |
| 965 | int ret = 0; |
| 966 | |
| 967 | memset(buf, 0, VPD_TMP_BUF_SIZE); |
| 968 | |
| 969 | switch (vpd->device_identifier_code_set) { |
| 970 | case 0x01: /* Binary */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 971 | snprintf(buf, sizeof(buf), |
| 972 | "T10 VPD Binary Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 973 | &vpd->device_identifier[0]); |
| 974 | break; |
| 975 | case 0x02: /* ASCII */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 976 | snprintf(buf, sizeof(buf), |
| 977 | "T10 VPD ASCII Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 978 | &vpd->device_identifier[0]); |
| 979 | break; |
| 980 | case 0x03: /* UTF-8 */ |
Dan Carpenter | 703d641 | 2013-01-18 16:05:12 +0300 | [diff] [blame] | 981 | snprintf(buf, sizeof(buf), |
| 982 | "T10 VPD UTF-8 Device Identifier: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 983 | &vpd->device_identifier[0]); |
| 984 | break; |
| 985 | default: |
| 986 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" |
| 987 | " 0x%02x", vpd->device_identifier_code_set); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 988 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 989 | break; |
| 990 | } |
| 991 | |
| 992 | if (p_buf) |
| 993 | strncpy(p_buf, buf, p_buf_len); |
| 994 | else |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 995 | pr_debug("%s", buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 996 | |
| 997 | return ret; |
| 998 | } |
| 999 | |
| 1000 | int |
| 1001 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) |
| 1002 | { |
| 1003 | static const char hex_str[] = "0123456789abcdef"; |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 1004 | int j = 0, i = 4; /* offset to start of the identifier */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1005 | |
| 1006 | /* |
| 1007 | * The VPD Code Set (encoding) |
| 1008 | * |
| 1009 | * from spc3r23.pdf Section 7.6.3.1 Table 296 |
| 1010 | */ |
| 1011 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); |
| 1012 | switch (vpd->device_identifier_code_set) { |
| 1013 | case 0x01: /* Binary */ |
| 1014 | vpd->device_identifier[j++] = |
| 1015 | hex_str[vpd->device_identifier_type]; |
| 1016 | while (i < (4 + page_83[3])) { |
| 1017 | vpd->device_identifier[j++] = |
| 1018 | hex_str[(page_83[i] & 0xf0) >> 4]; |
| 1019 | vpd->device_identifier[j++] = |
| 1020 | hex_str[page_83[i] & 0x0f]; |
| 1021 | i++; |
| 1022 | } |
| 1023 | break; |
| 1024 | case 0x02: /* ASCII */ |
| 1025 | case 0x03: /* UTF-8 */ |
| 1026 | while (i < (4 + page_83[3])) |
| 1027 | vpd->device_identifier[j++] = page_83[i++]; |
| 1028 | break; |
| 1029 | default: |
| 1030 | break; |
| 1031 | } |
| 1032 | |
| 1033 | return transport_dump_vpd_ident(vpd, NULL, 0); |
| 1034 | } |
| 1035 | EXPORT_SYMBOL(transport_set_vpd_ident); |
| 1036 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1037 | sense_reason_t |
| 1038 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1039 | { |
| 1040 | struct se_device *dev = cmd->se_dev; |
| 1041 | |
| 1042 | if (cmd->unknown_data_length) { |
| 1043 | cmd->data_length = size; |
| 1044 | } else if (size != cmd->data_length) { |
| 1045 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
| 1046 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
| 1047 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
| 1048 | cmd->data_length, size, cmd->t_task_cdb[0]); |
| 1049 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1050 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 1051 | pr_err("Rejecting underflow/overflow" |
| 1052 | " WRITE data\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1053 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1054 | } |
| 1055 | /* |
| 1056 | * Reject READ_* or WRITE_* with overflow/underflow for |
| 1057 | * type SCF_SCSI_DATA_CDB. |
| 1058 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1059 | if (dev->dev_attrib.block_size != 512) { |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1060 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
| 1061 | " CDB on non 512-byte sector setup subsystem" |
| 1062 | " plugin: %s\n", dev->transport->name); |
| 1063 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1064 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1065 | } |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1066 | /* |
| 1067 | * For the overflow case keep the existing fabric provided |
| 1068 | * ->data_length. Otherwise for the underflow case, reset |
| 1069 | * ->data_length to the smaller SCSI expected data transfer |
| 1070 | * length. |
| 1071 | */ |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1072 | if (size > cmd->data_length) { |
| 1073 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; |
| 1074 | cmd->residual_count = (size - cmd->data_length); |
| 1075 | } else { |
| 1076 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; |
| 1077 | cmd->residual_count = (cmd->data_length - size); |
Nicholas Bellinger | 4c054ba | 2012-08-16 15:33:10 -0700 | [diff] [blame] | 1078 | cmd->data_length = size; |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1079 | } |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1080 | } |
| 1081 | |
| 1082 | return 0; |
| 1083 | |
Christoph Hellwig | 9b3b804 | 2012-05-20 11:59:12 -0400 | [diff] [blame] | 1084 | } |
| 1085 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1086 | /* |
| 1087 | * Used by fabric modules containing a local struct se_cmd within their |
| 1088 | * fabric dependent per I/O descriptor. |
| 1089 | */ |
| 1090 | void transport_init_se_cmd( |
| 1091 | struct se_cmd *cmd, |
| 1092 | struct target_core_fabric_ops *tfo, |
| 1093 | struct se_session *se_sess, |
| 1094 | u32 data_length, |
| 1095 | int data_direction, |
| 1096 | int task_attr, |
| 1097 | unsigned char *sense_buffer) |
| 1098 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1099 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1100 | INIT_LIST_HEAD(&cmd->se_qf_node); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1101 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1102 | INIT_LIST_HEAD(&cmd->state_list); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1103 | init_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 1104 | init_completion(&cmd->cmd_wait_comp); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1105 | init_completion(&cmd->task_stop_comp); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1106 | spin_lock_init(&cmd->t_state_lock); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1107 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1108 | |
| 1109 | cmd->se_tfo = tfo; |
| 1110 | cmd->se_sess = se_sess; |
| 1111 | cmd->data_length = data_length; |
| 1112 | cmd->data_direction = data_direction; |
| 1113 | cmd->sam_task_attr = task_attr; |
| 1114 | cmd->sense_buffer = sense_buffer; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1115 | |
| 1116 | cmd->state_active = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1117 | } |
| 1118 | EXPORT_SYMBOL(transport_init_se_cmd); |
| 1119 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1120 | static sense_reason_t |
| 1121 | transport_check_alloc_task_attr(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1122 | { |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1123 | struct se_device *dev = cmd->se_dev; |
| 1124 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1125 | /* |
| 1126 | * Check if SAM Task Attribute emulation is enabled for this |
| 1127 | * struct se_device storage object |
| 1128 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1129 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1130 | return 0; |
| 1131 | |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1132 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1133 | pr_debug("SAM Task Attribute ACA" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1134 | " emulation is not supported\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1135 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1136 | } |
| 1137 | /* |
| 1138 | * Used to determine when ORDERED commands should go from |
| 1139 | * Dormant to Active status. |
| 1140 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1141 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1142 | smp_mb__after_atomic_inc(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1143 | 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] | 1144 | cmd->se_ordered_id, cmd->sam_task_attr, |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1145 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1146 | return 0; |
| 1147 | } |
| 1148 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1149 | sense_reason_t |
| 1150 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1151 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1152 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1153 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1154 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1155 | /* |
| 1156 | * Ensure that the received CDB is less than the max (252 + 8) bytes |
| 1157 | * for VARIABLE_LENGTH_CMD |
| 1158 | */ |
| 1159 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1160 | pr_err("Received SCSI CDB with command_size: %d that" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1161 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
| 1162 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1163 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1164 | } |
| 1165 | /* |
| 1166 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, |
| 1167 | * allocate the additional extended CDB buffer now.. Otherwise |
| 1168 | * setup the pointer from __t_task_cdb to t_task_cdb. |
| 1169 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1170 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
| 1171 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1172 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1173 | if (!cmd->t_task_cdb) { |
| 1174 | pr_err("Unable to allocate cmd->t_task_cdb" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1175 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1176 | scsi_command_size(cdb), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1177 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1178 | return TCM_OUT_OF_RESOURCES; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1179 | } |
| 1180 | } else |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1181 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1182 | /* |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1183 | * Copy the original CDB into cmd-> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1184 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1185 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1186 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1187 | trace_target_sequencer_start(cmd); |
| 1188 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1189 | /* |
| 1190 | * Check for an existing UNIT ATTENTION condition |
| 1191 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1192 | ret = target_scsi3_ua_check(cmd); |
| 1193 | if (ret) |
| 1194 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1195 | |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1196 | ret = target_alua_state_check(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1197 | if (ret) |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1198 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1199 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1200 | ret = target_check_reservation(cmd); |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1201 | if (ret) { |
| 1202 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1203 | return ret; |
Nicholas Bellinger | f85eda8 | 2013-03-28 23:06:00 -0700 | [diff] [blame] | 1204 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1205 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1206 | ret = dev->transport->parse_cdb(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1207 | if (ret) |
| 1208 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1209 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1210 | ret = transport_check_alloc_task_attr(cmd); |
| 1211 | if (ret) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1212 | return ret; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1213 | |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1214 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 1215 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1216 | spin_lock(&cmd->se_lun->lun_sep_lock); |
| 1217 | if (cmd->se_lun->lun_sep) |
| 1218 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; |
| 1219 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1220 | return 0; |
| 1221 | } |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1222 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1223 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1224 | /* |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1225 | * Used by fabric module frontends to queue tasks directly. |
| 1226 | * Many only be used from process context only |
| 1227 | */ |
| 1228 | int transport_handle_cdb_direct( |
| 1229 | struct se_cmd *cmd) |
| 1230 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1231 | sense_reason_t ret; |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1232 | |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1233 | if (!cmd->se_lun) { |
| 1234 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1235 | pr_err("cmd->se_lun is NULL\n"); |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1236 | return -EINVAL; |
| 1237 | } |
| 1238 | if (in_interrupt()) { |
| 1239 | dump_stack(); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1240 | pr_err("transport_generic_handle_cdb cannot be called" |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1241 | " from interrupt context\n"); |
| 1242 | return -EINVAL; |
| 1243 | } |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1244 | /* |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 1245 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
| 1246 | * outstanding descriptors are handled correctly during shutdown via |
| 1247 | * transport_wait_for_tasks() |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1248 | * |
| 1249 | * Also, we don't take cmd->t_state_lock here as we only expect |
| 1250 | * this to be called for initial descriptor submission. |
| 1251 | */ |
| 1252 | cmd->t_state = TRANSPORT_NEW_CMD; |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1253 | cmd->transport_state |= CMD_T_ACTIVE; |
| 1254 | |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1255 | /* |
| 1256 | * transport_generic_new_cmd() is already handling QUEUE_FULL, |
| 1257 | * so follow TRANSPORT_NEW_CMD processing thread context usage |
| 1258 | * and call transport_generic_request_failure() if necessary.. |
| 1259 | */ |
| 1260 | ret = transport_generic_new_cmd(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1261 | if (ret) |
| 1262 | transport_generic_request_failure(cmd, ret); |
Nicholas Bellinger | dd8ae59 | 2011-07-30 05:03:58 -0700 | [diff] [blame] | 1263 | return 0; |
Nicholas Bellinger | 695434e1 | 2011-06-03 20:59:19 -0700 | [diff] [blame] | 1264 | } |
| 1265 | EXPORT_SYMBOL(transport_handle_cdb_direct); |
| 1266 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 1267 | sense_reason_t |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1268 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
| 1269 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) |
| 1270 | { |
| 1271 | if (!sgl || !sgl_count) |
| 1272 | return 0; |
| 1273 | |
| 1274 | /* |
| 1275 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming |
| 1276 | * scatterlists already have been set to follow what the fabric |
| 1277 | * passes for the original expected data transfer length. |
| 1278 | */ |
| 1279 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { |
| 1280 | pr_warn("Rejecting SCSI DATA overflow for fabric using" |
| 1281 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); |
| 1282 | return TCM_INVALID_CDB_FIELD; |
| 1283 | } |
| 1284 | |
| 1285 | cmd->t_data_sg = sgl; |
| 1286 | cmd->t_data_nents = sgl_count; |
| 1287 | |
| 1288 | if (sgl_bidi && sgl_bidi_count) { |
| 1289 | cmd->t_bidi_data_sg = sgl_bidi; |
| 1290 | cmd->t_bidi_data_nents = sgl_bidi_count; |
| 1291 | } |
| 1292 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1296 | /* |
| 1297 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized |
| 1298 | * se_cmd + use pre-allocated SGL memory. |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1299 | * |
| 1300 | * @se_cmd: command descriptor to submit |
| 1301 | * @se_sess: associated se_sess for endpoint |
| 1302 | * @cdb: pointer to SCSI CDB |
| 1303 | * @sense: pointer to SCSI sense buffer |
| 1304 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1305 | * @data_length: fabric expected data transfer length |
| 1306 | * @task_addr: SAM task attribute |
| 1307 | * @data_dir: DMA data direction |
| 1308 | * @flags: flags for command submission from target_sc_flags_tables |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1309 | * @sgl: struct scatterlist memory for unidirectional mapping |
| 1310 | * @sgl_count: scatterlist count for unidirectional mapping |
| 1311 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping |
| 1312 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame^] | 1313 | * @sgl_prot: struct scatterlist memory protection information |
| 1314 | * @sgl_prot_count: scatterlist count for protection information |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1315 | * |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1316 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1317 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1318 | * but still return zero here. |
| 1319 | * |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1320 | * This may only be called from process context, and also currently |
| 1321 | * assumes internal allocation of fabric payload buffer by target-core. |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1322 | */ |
| 1323 | 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] | 1324 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1325 | u32 data_length, int task_attr, int data_dir, int flags, |
| 1326 | struct scatterlist *sgl, u32 sgl_count, |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame^] | 1327 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count, |
| 1328 | struct scatterlist *sgl_prot, u32 sgl_prot_count) |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1329 | { |
| 1330 | struct se_portal_group *se_tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1331 | sense_reason_t rc; |
| 1332 | int ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1333 | |
| 1334 | se_tpg = se_sess->se_tpg; |
| 1335 | BUG_ON(!se_tpg); |
| 1336 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); |
| 1337 | BUG_ON(in_interrupt()); |
| 1338 | /* |
| 1339 | * Initialize se_cmd for target operation. From this point |
| 1340 | * exceptions are handled by sending exception status via |
| 1341 | * target_core_fabric_ops->queue_status() callback |
| 1342 | */ |
| 1343 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1344 | data_length, data_dir, task_attr, sense); |
Sebastian Andrzej Siewior | b0d7994 | 2012-01-10 14:16:59 +0100 | [diff] [blame] | 1345 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
| 1346 | se_cmd->unknown_data_length = 1; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1347 | /* |
| 1348 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to |
| 1349 | * se_sess->sess_cmd_list. A second kref_get here is necessary |
| 1350 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second |
| 1351 | * kref_put() to happen during fabric packet acknowledgement. |
| 1352 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1353 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
| 1354 | if (ret) |
| 1355 | return ret; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1356 | /* |
| 1357 | * Signal bidirectional data payloads to target-core |
| 1358 | */ |
| 1359 | if (flags & TARGET_SCF_BIDI_OP) |
| 1360 | se_cmd->se_cmd_flags |= SCF_BIDI; |
| 1361 | /* |
| 1362 | * Locate se_lun pointer and attach it to struct se_cmd |
| 1363 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1364 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
| 1365 | if (rc) { |
| 1366 | transport_send_check_condition_and_sense(se_cmd, rc, 0); |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1367 | target_put_sess_cmd(se_sess, se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1368 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1369 | } |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame^] | 1370 | /* |
| 1371 | * Save pointers for SGLs containing protection information, |
| 1372 | * if present. |
| 1373 | */ |
| 1374 | if (sgl_prot_count) { |
| 1375 | se_cmd->t_prot_sg = sgl_prot; |
| 1376 | se_cmd->t_prot_nents = sgl_prot_count; |
| 1377 | } |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1378 | |
Andy Grover | a12f41f | 2012-04-03 15:51:20 -0700 | [diff] [blame] | 1379 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1380 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1381 | transport_generic_request_failure(se_cmd, rc); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1382 | return 0; |
Nicholas Bellinger | 735703c | 2012-01-20 19:02:56 -0800 | [diff] [blame] | 1383 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1384 | /* |
| 1385 | * When a non zero sgl_count has been passed perform SGL passthrough |
| 1386 | * mapping for pre-allocated fabric memory instead of having target |
| 1387 | * core perform an internal SGL allocation.. |
| 1388 | */ |
| 1389 | if (sgl_count != 0) { |
| 1390 | BUG_ON(!sgl); |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1391 | |
Nicholas Bellinger | 944981c | 2012-10-02 14:00:33 -0700 | [diff] [blame] | 1392 | /* |
| 1393 | * A work-around for tcm_loop as some userspace code via |
| 1394 | * scsi-generic do not memset their associated read buffers, |
| 1395 | * so go ahead and do that here for type non-data CDBs. Also |
| 1396 | * note that this is currently guaranteed to be a single SGL |
| 1397 | * for this case by target core in target_setup_cmd_from_cdb() |
| 1398 | * -> transport_generic_cmd_sequencer(). |
| 1399 | */ |
| 1400 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && |
| 1401 | se_cmd->data_direction == DMA_FROM_DEVICE) { |
| 1402 | unsigned char *buf = NULL; |
| 1403 | |
| 1404 | if (sgl) |
| 1405 | buf = kmap(sg_page(sgl)) + sgl->offset; |
| 1406 | |
| 1407 | if (buf) { |
| 1408 | memset(buf, 0, sgl->length); |
| 1409 | kunmap(sg_page(sgl)); |
| 1410 | } |
| 1411 | } |
| 1412 | |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1413 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
| 1414 | sgl_bidi, sgl_bidi_count); |
| 1415 | if (rc != 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1416 | transport_generic_request_failure(se_cmd, rc); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1417 | return 0; |
| 1418 | } |
| 1419 | } |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame^] | 1420 | |
Andy Grover | 11e319e | 2012-04-03 15:51:28 -0700 | [diff] [blame] | 1421 | /* |
| 1422 | * Check if we need to delay processing because of ALUA |
| 1423 | * Active/NonOptimized primary access state.. |
| 1424 | */ |
| 1425 | core_alua_check_nonop_delay(se_cmd); |
| 1426 | |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1427 | transport_handle_cdb_direct(se_cmd); |
Roland Dreier | d6dfc86 | 2012-07-16 11:04:39 -0700 | [diff] [blame] | 1428 | return 0; |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1429 | } |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1430 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
| 1431 | |
| 1432 | /* |
| 1433 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd |
| 1434 | * |
| 1435 | * @se_cmd: command descriptor to submit |
| 1436 | * @se_sess: associated se_sess for endpoint |
| 1437 | * @cdb: pointer to SCSI CDB |
| 1438 | * @sense: pointer to SCSI sense buffer |
| 1439 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1440 | * @data_length: fabric expected data transfer length |
| 1441 | * @task_addr: SAM task attribute |
| 1442 | * @data_dir: DMA data direction |
| 1443 | * @flags: flags for command submission from target_sc_flags_tables |
| 1444 | * |
| 1445 | * Returns non zero to signal active I/O shutdown failure. All other |
| 1446 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, |
| 1447 | * but still return zero here. |
| 1448 | * |
| 1449 | * This may only be called from process context, and also currently |
| 1450 | * assumes internal allocation of fabric payload buffer by target-core. |
| 1451 | * |
| 1452 | * It also assumes interal target core SGL memory allocation. |
| 1453 | */ |
| 1454 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
| 1455 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
| 1456 | u32 data_length, int task_attr, int data_dir, int flags) |
| 1457 | { |
| 1458 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, |
| 1459 | unpacked_lun, data_length, task_attr, data_dir, |
Nicholas Bellinger | def2b33 | 2013-12-23 20:38:30 +0000 | [diff] [blame^] | 1460 | flags, NULL, 0, NULL, 0, NULL, 0); |
Nicholas Bellinger | a026757 | 2012-10-01 17:23:22 -0700 | [diff] [blame] | 1461 | } |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 1462 | EXPORT_SYMBOL(target_submit_cmd); |
| 1463 | |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1464 | static void target_complete_tmr_failure(struct work_struct *work) |
| 1465 | { |
| 1466 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); |
| 1467 | |
| 1468 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; |
| 1469 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); |
Roland Dreier | 5a3b6fc0 | 2013-01-02 12:47:59 -0800 | [diff] [blame] | 1470 | |
| 1471 | transport_cmd_check_stop_to_fabric(se_cmd); |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1472 | } |
| 1473 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1474 | /** |
| 1475 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd |
| 1476 | * for TMR CDBs |
| 1477 | * |
| 1478 | * @se_cmd: command descriptor to submit |
| 1479 | * @se_sess: associated se_sess for endpoint |
| 1480 | * @sense: pointer to SCSI sense buffer |
| 1481 | * @unpacked_lun: unpacked LUN to reference for struct se_lun |
| 1482 | * @fabric_context: fabric context for TMR req |
| 1483 | * @tm_type: Type of TM request |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1484 | * @gfp: gfp type for caller |
| 1485 | * @tag: referenced task tag for TMR_ABORT_TASK |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1486 | * @flags: submit cmd flags |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1487 | * |
| 1488 | * Callable from all contexts. |
| 1489 | **/ |
| 1490 | |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1491 | 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] | 1492 | unsigned char *sense, u32 unpacked_lun, |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1493 | void *fabric_tmr_ptr, unsigned char tm_type, |
| 1494 | gfp_t gfp, unsigned int tag, int flags) |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1495 | { |
| 1496 | struct se_portal_group *se_tpg; |
| 1497 | int ret; |
| 1498 | |
| 1499 | se_tpg = se_sess->se_tpg; |
| 1500 | BUG_ON(!se_tpg); |
| 1501 | |
| 1502 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, |
| 1503 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1504 | /* |
| 1505 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req |
| 1506 | * allocation failure. |
| 1507 | */ |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1508 | 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] | 1509 | if (ret < 0) |
| 1510 | return -ENOMEM; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1511 | |
Nicholas Bellinger | c0974f8 | 2012-02-25 05:10:04 -0800 | [diff] [blame] | 1512 | if (tm_type == TMR_ABORT_TASK) |
| 1513 | se_cmd->se_tmr_req->ref_task_tag = tag; |
| 1514 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1515 | /* See target_submit_cmd for commentary */ |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 1516 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
| 1517 | if (ret) { |
| 1518 | core_tmr_release_req(se_cmd->se_tmr_req); |
| 1519 | return ret; |
| 1520 | } |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1521 | |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1522 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
| 1523 | if (ret) { |
Nicholas Bellinger | 9f0d05c | 2012-02-25 05:02:48 -0800 | [diff] [blame] | 1524 | /* |
| 1525 | * For callback during failure handling, push this work off |
| 1526 | * to process context with TMR_LUN_DOES_NOT_EXIST status. |
| 1527 | */ |
| 1528 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); |
| 1529 | schedule_work(&se_cmd->work); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1530 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1531 | } |
| 1532 | transport_generic_handle_tmr(se_cmd); |
Nicholas Bellinger | c7042ca | 2012-02-25 01:40:24 -0800 | [diff] [blame] | 1533 | return 0; |
Andy Grover | ea98d7f | 2012-01-19 13:39:21 -0800 | [diff] [blame] | 1534 | } |
| 1535 | EXPORT_SYMBOL(target_submit_tmr); |
| 1536 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1537 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1538 | * 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] | 1539 | * has completed. |
| 1540 | */ |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1541 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1542 | { |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1543 | bool was_active = false; |
| 1544 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1545 | if (cmd->transport_state & CMD_T_BUSY) { |
| 1546 | cmd->transport_state |= CMD_T_REQUEST_STOP; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1547 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
| 1548 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1549 | pr_debug("cmd %p waiting to complete\n", cmd); |
| 1550 | wait_for_completion(&cmd->task_stop_comp); |
| 1551 | pr_debug("cmd %p stopped successfully\n", cmd); |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1552 | |
| 1553 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 1554 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
| 1555 | cmd->transport_state &= ~CMD_T_BUSY; |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1556 | was_active = true; |
| 1557 | } |
| 1558 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 1559 | return was_active; |
| 1560 | } |
| 1561 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1562 | /* |
| 1563 | * Handle SAM-esque emulation for generic transport request failures. |
| 1564 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1565 | void transport_generic_request_failure(struct se_cmd *cmd, |
| 1566 | sense_reason_t sense_reason) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1567 | { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1568 | int ret = 0; |
| 1569 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1570 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1571 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1572 | cmd->t_task_cdb[0]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1573 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1574 | cmd->se_tfo->get_cmd_state(cmd), |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1575 | cmd->t_state, sense_reason); |
Christoph Hellwig | d43d6ae | 2012-04-24 00:25:08 -0400 | [diff] [blame] | 1576 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 1577 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 1578 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 1579 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1580 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1581 | /* |
| 1582 | * For SAM Task Attribute emulation for failed struct se_cmd |
| 1583 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1584 | transport_complete_task_attr(cmd); |
Nicholas Bellinger | cf6d1f0 | 2013-08-21 19:34:43 -0700 | [diff] [blame] | 1585 | /* |
| 1586 | * Handle special case for COMPARE_AND_WRITE failure, where the |
| 1587 | * callback is expected to drop the per device ->caw_mutex. |
| 1588 | */ |
| 1589 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
| 1590 | cmd->transport_complete_callback) |
| 1591 | cmd->transport_complete_callback(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1592 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1593 | switch (sense_reason) { |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1594 | case TCM_NON_EXISTENT_LUN: |
| 1595 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 1596 | case TCM_INVALID_CDB_FIELD: |
| 1597 | case TCM_INVALID_PARAMETER_LIST: |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 1598 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1599 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 1600 | case TCM_UNKNOWN_MODE_PAGE: |
| 1601 | case TCM_WRITE_PROTECTED: |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 1602 | case TCM_ADDRESS_OUT_OF_RANGE: |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1603 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 1604 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 1605 | case TCM_CHECK_CONDITION_NOT_READY: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1606 | break; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1607 | case TCM_OUT_OF_RESOURCES: |
| 1608 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1609 | break; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1610 | case TCM_RESERVATION_CONFLICT: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1611 | /* |
| 1612 | * No SENSE Data payload for this case, set SCSI Status |
| 1613 | * and queue the response to $FABRIC_MOD. |
| 1614 | * |
| 1615 | * Uses linux/include/scsi/scsi.h SAM status codes defs |
| 1616 | */ |
| 1617 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
| 1618 | /* |
| 1619 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will |
| 1620 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION |
| 1621 | * CONFLICT STATUS. |
| 1622 | * |
| 1623 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 |
| 1624 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1625 | if (cmd->se_sess && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1626 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1627 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1628 | cmd->orig_fe_lun, 0x2C, |
| 1629 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); |
| 1630 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1631 | trace_target_cmd_complete(cmd); |
| 1632 | ret = cmd->se_tfo-> queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1633 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1634 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1635 | goto check_stop; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1636 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1637 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1638 | cmd->t_task_cdb[0], sense_reason); |
| 1639 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1640 | break; |
| 1641 | } |
Christoph Hellwig | f314643 | 2012-07-08 15:58:48 -0400 | [diff] [blame] | 1642 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1643 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1644 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1645 | goto queue_full; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1646 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1647 | check_stop: |
| 1648 | transport_lun_remove_cmd(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1649 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1650 | ; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1651 | return; |
| 1652 | |
| 1653 | queue_full: |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1654 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1655 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1656 | } |
Nicholas Bellinger | 2fbff127 | 2012-02-10 16:18:11 -0800 | [diff] [blame] | 1657 | EXPORT_SYMBOL(transport_generic_request_failure); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1658 | |
Nicholas Bellinger | 76dde50 | 2013-08-21 16:04:10 -0700 | [diff] [blame] | 1659 | void __target_execute_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1660 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1661 | sense_reason_t ret; |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1662 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1663 | if (cmd->execute_cmd) { |
| 1664 | ret = cmd->execute_cmd(cmd); |
| 1665 | if (ret) { |
| 1666 | spin_lock_irq(&cmd->t_state_lock); |
| 1667 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
| 1668 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1669 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1670 | transport_generic_request_failure(cmd, ret); |
| 1671 | } |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1672 | } |
| 1673 | } |
| 1674 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1675 | static bool target_handle_task_attr(struct se_cmd *cmd) |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1676 | { |
| 1677 | struct se_device *dev = cmd->se_dev; |
| 1678 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1679 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 1680 | return false; |
| 1681 | |
| 1682 | /* |
| 1683 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
| 1684 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
| 1685 | */ |
| 1686 | switch (cmd->sam_task_attr) { |
| 1687 | case MSG_HEAD_TAG: |
| 1688 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
| 1689 | "se_ordered_id: %u\n", |
| 1690 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1691 | return false; |
| 1692 | case MSG_ORDERED_TAG: |
| 1693 | atomic_inc(&dev->dev_ordered_sync); |
| 1694 | smp_mb__after_atomic_inc(); |
| 1695 | |
| 1696 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
| 1697 | " se_ordered_id: %u\n", |
| 1698 | cmd->t_task_cdb[0], cmd->se_ordered_id); |
| 1699 | |
| 1700 | /* |
| 1701 | * Execute an ORDERED command if no other older commands |
| 1702 | * exist that need to be completed first. |
| 1703 | */ |
| 1704 | if (!atomic_read(&dev->simple_cmds)) |
| 1705 | return false; |
| 1706 | break; |
| 1707 | default: |
| 1708 | /* |
| 1709 | * For SIMPLE and UNTAGGED Task Attribute commands |
| 1710 | */ |
| 1711 | atomic_inc(&dev->simple_cmds); |
| 1712 | smp_mb__after_atomic_inc(); |
| 1713 | break; |
| 1714 | } |
| 1715 | |
| 1716 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
| 1717 | return false; |
| 1718 | |
| 1719 | spin_lock(&dev->delayed_cmd_lock); |
| 1720 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); |
| 1721 | spin_unlock(&dev->delayed_cmd_lock); |
| 1722 | |
| 1723 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
| 1724 | " delayed CMD list, se_ordered_id: %u\n", |
| 1725 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
| 1726 | cmd->se_ordered_id); |
| 1727 | return true; |
| 1728 | } |
| 1729 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1730 | void target_execute_cmd(struct se_cmd *cmd) |
| 1731 | { |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1732 | /* |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1733 | * If the received CDB has aleady been aborted stop processing it here. |
| 1734 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1735 | if (transport_check_aborted_status(cmd, 1)) |
Christoph Hellwig | d59a02b | 2012-07-08 15:58:40 -0400 | [diff] [blame] | 1736 | return; |
| 1737 | |
| 1738 | /* |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1739 | * Determine if frontend context caller is requesting the stopping of |
| 1740 | * this command for frontend exceptions. |
| 1741 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 1742 | spin_lock_irq(&cmd->t_state_lock); |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1743 | if (cmd->transport_state & CMD_T_STOP) { |
| 1744 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", |
| 1745 | __func__, __LINE__, |
| 1746 | cmd->se_tfo->get_task_tag(cmd)); |
| 1747 | |
| 1748 | spin_unlock_irq(&cmd->t_state_lock); |
| 1749 | complete(&cmd->t_transport_stop_comp); |
| 1750 | return; |
| 1751 | } |
| 1752 | |
| 1753 | cmd->t_state = TRANSPORT_PROCESSING; |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1754 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
Christoph Hellwig | f7113a4 | 2012-07-08 15:58:38 -0400 | [diff] [blame] | 1755 | spin_unlock_irq(&cmd->t_state_lock); |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1756 | |
Nicholas Bellinger | 1a398b9 | 2013-06-06 01:40:27 -0700 | [diff] [blame] | 1757 | if (target_handle_task_attr(cmd)) { |
| 1758 | spin_lock_irq(&cmd->t_state_lock); |
| 1759 | cmd->transport_state &= ~CMD_T_BUSY|CMD_T_SENT; |
| 1760 | spin_unlock_irq(&cmd->t_state_lock); |
| 1761 | return; |
| 1762 | } |
| 1763 | |
| 1764 | __target_execute_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1765 | } |
Christoph Hellwig | 70baf0a | 2012-07-08 15:58:39 -0400 | [diff] [blame] | 1766 | EXPORT_SYMBOL(target_execute_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1767 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1768 | /* |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1769 | * Process all commands up to the last received ORDERED task attribute which |
| 1770 | * requires another blocking boundary |
| 1771 | */ |
| 1772 | static void target_restart_delayed_cmds(struct se_device *dev) |
| 1773 | { |
| 1774 | for (;;) { |
| 1775 | struct se_cmd *cmd; |
| 1776 | |
| 1777 | spin_lock(&dev->delayed_cmd_lock); |
| 1778 | if (list_empty(&dev->delayed_cmd_list)) { |
| 1779 | spin_unlock(&dev->delayed_cmd_lock); |
| 1780 | break; |
| 1781 | } |
| 1782 | |
| 1783 | cmd = list_entry(dev->delayed_cmd_list.next, |
| 1784 | struct se_cmd, se_delayed_node); |
| 1785 | list_del(&cmd->se_delayed_node); |
| 1786 | spin_unlock(&dev->delayed_cmd_lock); |
| 1787 | |
| 1788 | __target_execute_cmd(cmd); |
| 1789 | |
| 1790 | if (cmd->sam_task_attr == MSG_ORDERED_TAG) |
| 1791 | break; |
| 1792 | } |
| 1793 | } |
| 1794 | |
| 1795 | /* |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1796 | * Called from I/O completion to determine which dormant/delayed |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1797 | * and ordered cmds need to have their tasks added to the execution queue. |
| 1798 | */ |
| 1799 | static void transport_complete_task_attr(struct se_cmd *cmd) |
| 1800 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1801 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1802 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1803 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 1804 | return; |
| 1805 | |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1806 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1807 | atomic_dec(&dev->simple_cmds); |
| 1808 | smp_mb__after_atomic_dec(); |
| 1809 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1810 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1811 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
| 1812 | cmd->se_ordered_id); |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1813 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1814 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1815 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1816 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
| 1817 | cmd->se_ordered_id); |
Nicholas Bellinger | e66ecd5 | 2011-05-19 20:19:14 -0700 | [diff] [blame] | 1818 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1819 | atomic_dec(&dev->dev_ordered_sync); |
| 1820 | smp_mb__after_atomic_dec(); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1821 | |
| 1822 | dev->dev_cur_ordered_id++; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1823 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1824 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
| 1825 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1826 | |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 1827 | target_restart_delayed_cmds(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1828 | } |
| 1829 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1830 | static void transport_complete_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1831 | { |
| 1832 | int ret = 0; |
| 1833 | |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1834 | transport_complete_task_attr(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1835 | |
| 1836 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1837 | trace_target_cmd_complete(cmd); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1838 | ret = cmd->se_tfo->queue_status(cmd); |
| 1839 | if (ret) |
| 1840 | goto out; |
| 1841 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1842 | |
| 1843 | switch (cmd->data_direction) { |
| 1844 | case DMA_FROM_DEVICE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1845 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1846 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1847 | break; |
| 1848 | case DMA_TO_DEVICE: |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 1849 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1850 | ret = cmd->se_tfo->queue_data_in(cmd); |
| 1851 | if (ret < 0) |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1852 | break; |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1853 | } |
| 1854 | /* Fall through for DMA_TO_DEVICE */ |
| 1855 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1856 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1857 | ret = cmd->se_tfo->queue_status(cmd); |
| 1858 | break; |
| 1859 | default: |
| 1860 | break; |
| 1861 | } |
| 1862 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1863 | out: |
| 1864 | if (ret < 0) { |
| 1865 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 1866 | return; |
| 1867 | } |
| 1868 | transport_lun_remove_cmd(cmd); |
| 1869 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1870 | } |
| 1871 | |
| 1872 | static void transport_handle_queue_full( |
| 1873 | struct se_cmd *cmd, |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1874 | struct se_device *dev) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1875 | { |
| 1876 | spin_lock_irq(&dev->qf_cmd_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1877 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
| 1878 | atomic_inc(&dev->dev_qf_count); |
| 1879 | smp_mb__after_atomic_inc(); |
| 1880 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
| 1881 | |
| 1882 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1883 | } |
| 1884 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1885 | static void target_complete_ok_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1886 | { |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1887 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1888 | int ret; |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 1889 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1890 | /* |
| 1891 | * Check if we need to move delayed/dormant tasks from cmds on the |
| 1892 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task |
| 1893 | * Attribute. |
| 1894 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1895 | transport_complete_task_attr(cmd); |
| 1896 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1897 | /* |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1898 | * Check to schedule QUEUE_FULL work, or execute an existing |
| 1899 | * cmd->transport_qf_callback() |
| 1900 | */ |
| 1901 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) |
| 1902 | schedule_work(&cmd->se_dev->qf_work_queue); |
| 1903 | |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1904 | /* |
Paolo Bonzini | d5829ea | 2012-09-05 17:09:15 +0200 | [diff] [blame] | 1905 | * Check if we need to send a sense buffer from |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1906 | * the struct se_cmd in question. |
| 1907 | */ |
| 1908 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1909 | WARN_ON(!cmd->scsi_status); |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1910 | ret = transport_send_check_condition_and_sense( |
| 1911 | cmd, 0, 1); |
| 1912 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1913 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1914 | |
Paolo Bonzini | 27a2709 | 2012-09-05 17:09:14 +0200 | [diff] [blame] | 1915 | transport_lun_remove_cmd(cmd); |
| 1916 | transport_cmd_check_stop_to_fabric(cmd); |
| 1917 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1918 | } |
| 1919 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1920 | * Check for a callback, used by amongst other things |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1921 | * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1922 | */ |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1923 | if (cmd->transport_complete_callback) { |
| 1924 | sense_reason_t rc; |
| 1925 | |
| 1926 | rc = cmd->transport_complete_callback(cmd); |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 1927 | if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) { |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1928 | return; |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 1929 | } else if (rc) { |
| 1930 | ret = transport_send_check_condition_and_sense(cmd, |
| 1931 | rc, 0); |
| 1932 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 1933 | goto queue_full; |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1934 | |
Nicholas Bellinger | a289008 | 2013-08-21 18:10:04 -0700 | [diff] [blame] | 1935 | transport_lun_remove_cmd(cmd); |
| 1936 | transport_cmd_check_stop_to_fabric(cmd); |
| 1937 | return; |
| 1938 | } |
Nicholas Bellinger | a6b0133 | 2013-08-19 14:34:17 -0700 | [diff] [blame] | 1939 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1940 | |
| 1941 | switch (cmd->data_direction) { |
| 1942 | case DMA_FROM_DEVICE: |
| 1943 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1944 | if (cmd->se_lun->lun_sep) { |
| 1945 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1946 | cmd->data_length; |
| 1947 | } |
| 1948 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1949 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1950 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1951 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1952 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1953 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1954 | break; |
| 1955 | case DMA_TO_DEVICE: |
| 1956 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1957 | if (cmd->se_lun->lun_sep) { |
| 1958 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1959 | cmd->data_length; |
| 1960 | } |
| 1961 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
| 1962 | /* |
| 1963 | * Check if we need to send READ payload for BIDI-COMMAND |
| 1964 | */ |
Nicholas Bellinger | 6457740 | 2013-08-21 14:39:19 -0700 | [diff] [blame] | 1965 | if (cmd->se_cmd_flags & SCF_BIDI) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1966 | spin_lock(&cmd->se_lun->lun_sep_lock); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1967 | if (cmd->se_lun->lun_sep) { |
| 1968 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1969 | cmd->data_length; |
| 1970 | } |
| 1971 | spin_unlock(&cmd->se_lun->lun_sep_lock); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1972 | ret = cmd->se_tfo->queue_data_in(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1973 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1974 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1975 | break; |
| 1976 | } |
| 1977 | /* Fall through for DMA_TO_DEVICE */ |
| 1978 | case DMA_NONE: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 1979 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1980 | ret = cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 1981 | if (ret == -EAGAIN || ret == -ENOMEM) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1982 | goto queue_full; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1983 | break; |
| 1984 | default: |
| 1985 | break; |
| 1986 | } |
| 1987 | |
| 1988 | transport_lun_remove_cmd(cmd); |
| 1989 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1990 | return; |
| 1991 | |
| 1992 | queue_full: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1993 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 1994 | " data_direction: %d\n", cmd, cmd->data_direction); |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 1995 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
| 1996 | transport_handle_queue_full(cmd, cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1997 | } |
| 1998 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1999 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2000 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2001 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2002 | int count; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2003 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2004 | for_each_sg(sgl, sg, nents, count) |
| 2005 | __free_page(sg_page(sg)); |
| 2006 | |
| 2007 | kfree(sgl); |
| 2008 | } |
| 2009 | |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2010 | static inline void transport_reset_sgl_orig(struct se_cmd *cmd) |
| 2011 | { |
| 2012 | /* |
| 2013 | * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE |
| 2014 | * emulation, and free + reset pointers if necessary.. |
| 2015 | */ |
| 2016 | if (!cmd->t_data_sg_orig) |
| 2017 | return; |
| 2018 | |
| 2019 | kfree(cmd->t_data_sg); |
| 2020 | cmd->t_data_sg = cmd->t_data_sg_orig; |
| 2021 | cmd->t_data_sg_orig = NULL; |
| 2022 | cmd->t_data_nents = cmd->t_data_nents_orig; |
| 2023 | cmd->t_data_nents_orig = 0; |
| 2024 | } |
| 2025 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2026 | static inline void transport_free_pages(struct se_cmd *cmd) |
| 2027 | { |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2028 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { |
| 2029 | transport_reset_sgl_orig(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2030 | return; |
Nicholas Bellinger | 47e459e | 2013-08-20 10:45:16 -0700 | [diff] [blame] | 2031 | } |
| 2032 | transport_reset_sgl_orig(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2033 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2034 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2035 | cmd->t_data_sg = NULL; |
| 2036 | cmd->t_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2037 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2038 | 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] | 2039 | cmd->t_bidi_data_sg = NULL; |
| 2040 | cmd->t_bidi_data_nents = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2041 | } |
| 2042 | |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2043 | /** |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2044 | * transport_release_cmd - free a command |
| 2045 | * @cmd: command to free |
| 2046 | * |
| 2047 | * This routine unconditionally frees a command, and reference counting |
| 2048 | * or list removal must be done in the caller. |
| 2049 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2050 | static int transport_release_cmd(struct se_cmd *cmd) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2051 | { |
| 2052 | BUG_ON(!cmd->se_tfo); |
| 2053 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2054 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2055 | core_tmr_release_req(cmd->se_tmr_req); |
| 2056 | if (cmd->t_task_cdb != cmd->__t_task_cdb) |
| 2057 | kfree(cmd->t_task_cdb); |
| 2058 | /* |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2059 | * If this cmd has been setup with target_get_sess_cmd(), drop |
| 2060 | * the kref and call ->release_cmd() in kref callback. |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2061 | */ |
Nicholas Bellinger | ca24976 | 2013-06-06 02:06:14 -0700 | [diff] [blame] | 2062 | return target_put_sess_cmd(cmd->se_sess, cmd); |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 2063 | } |
| 2064 | |
| 2065 | /** |
Christoph Hellwig | d3df782 | 2011-09-13 23:08:32 +0200 | [diff] [blame] | 2066 | * transport_put_cmd - release a reference to a command |
| 2067 | * @cmd: command to release |
| 2068 | * |
| 2069 | * This routine releases our reference to the command and frees it if possible. |
| 2070 | */ |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2071 | static int transport_put_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2072 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2073 | transport_free_pages(cmd); |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2074 | return transport_release_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2075 | } |
| 2076 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2077 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2078 | { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2079 | struct scatterlist *sg = cmd->t_data_sg; |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2080 | struct page **pages; |
| 2081 | int i; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2082 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2083 | /* |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2084 | * We need to take into account a possible offset here for fabrics like |
| 2085 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for |
| 2086 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2087 | */ |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2088 | if (!cmd->t_data_nents) |
| 2089 | return NULL; |
Paolo Bonzini | 3717ef0 | 2012-09-07 17:30:35 +0200 | [diff] [blame] | 2090 | |
| 2091 | BUG_ON(!sg); |
| 2092 | if (cmd->t_data_nents == 1) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2093 | return kmap(sg_page(sg)) + sg->offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2094 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2095 | /* >1 page. use vmap */ |
| 2096 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2097 | if (!pages) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2098 | return NULL; |
| 2099 | |
| 2100 | /* convert sg[] to pages[] */ |
| 2101 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { |
| 2102 | pages[i] = sg_page(sg); |
| 2103 | } |
| 2104 | |
| 2105 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); |
| 2106 | kfree(pages); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2107 | if (!cmd->t_data_vmap) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2108 | return NULL; |
| 2109 | |
| 2110 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2111 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2112 | EXPORT_SYMBOL(transport_kmap_data_sg); |
| 2113 | |
| 2114 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
| 2115 | { |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2116 | if (!cmd->t_data_nents) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2117 | return; |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2118 | } else if (cmd->t_data_nents == 1) { |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2119 | kunmap(sg_page(cmd->t_data_sg)); |
Andy Grover | a1edf9c | 2012-02-09 12:18:06 -0800 | [diff] [blame] | 2120 | return; |
| 2121 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 2122 | |
| 2123 | vunmap(cmd->t_data_vmap); |
| 2124 | cmd->t_data_vmap = NULL; |
| 2125 | } |
| 2126 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2127 | |
Nicholas Bellinger | c5ff8d6 | 2013-08-22 11:58:43 -0700 | [diff] [blame] | 2128 | int |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2129 | target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, |
| 2130 | bool zero_page) |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2131 | { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2132 | struct scatterlist *sg; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2133 | struct page *page; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2134 | gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; |
| 2135 | unsigned int nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2136 | int i = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 2137 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2138 | nent = DIV_ROUND_UP(length, PAGE_SIZE); |
| 2139 | sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL); |
| 2140 | if (!sg) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2141 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2142 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2143 | sg_init_table(sg, nent); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2144 | |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2145 | while (length) { |
| 2146 | u32 page_len = min_t(u32, length, PAGE_SIZE); |
roland@purestorage.com | 9db9da3 | 2012-01-04 15:59:58 -0800 | [diff] [blame] | 2147 | page = alloc_page(GFP_KERNEL | zero_flag); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2148 | if (!page) |
| 2149 | goto out; |
| 2150 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2151 | sg_set_page(&sg[i], page, page_len, 0); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2152 | length -= page_len; |
| 2153 | i++; |
| 2154 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2155 | *sgl = sg; |
| 2156 | *nents = nent; |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2157 | return 0; |
| 2158 | |
| 2159 | out: |
Yi Zou | d0e27c8 | 2012-08-14 16:06:43 -0700 | [diff] [blame] | 2160 | while (i > 0) { |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2161 | i--; |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2162 | __free_page(sg_page(&sg[i])); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2163 | } |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2164 | kfree(sg); |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2165 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2166 | } |
| 2167 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2168 | /* |
Andy Grover | b16a35b | 2012-04-03 15:51:21 -0700 | [diff] [blame] | 2169 | * Allocate any required resources to execute the command. For writes we |
| 2170 | * might not have the payload yet, so notify the fabric via a call to |
| 2171 | * ->write_pending instead. Otherwise place it on the execution queue. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2172 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2173 | sense_reason_t |
| 2174 | transport_generic_new_cmd(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2175 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2176 | int ret = 0; |
| 2177 | |
| 2178 | /* |
| 2179 | * Determine is the TCM fabric module has already allocated physical |
| 2180 | * memory, and is directly calling transport_generic_map_mem_to_cmd() |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2181 | * beforehand. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2182 | */ |
Andy Grover | ec98f78 | 2011-07-20 19:28:46 +0000 | [diff] [blame] | 2183 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
| 2184 | cmd->data_length) { |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2185 | bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB); |
| 2186 | |
Nicholas Bellinger | 8cefe07 | 2013-08-25 16:10:57 -0700 | [diff] [blame] | 2187 | if ((cmd->se_cmd_flags & SCF_BIDI) || |
| 2188 | (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) { |
| 2189 | u32 bidi_length; |
| 2190 | |
| 2191 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) |
| 2192 | bidi_length = cmd->t_task_nolb * |
| 2193 | cmd->se_dev->dev_attrib.block_size; |
| 2194 | else |
| 2195 | bidi_length = cmd->data_length; |
| 2196 | |
| 2197 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, |
| 2198 | &cmd->t_bidi_data_nents, |
| 2199 | bidi_length, zero_flag); |
| 2200 | if (ret < 0) |
| 2201 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 2202 | } |
| 2203 | |
Nicholas Bellinger | 2009399 | 2013-08-25 15:44:03 -0700 | [diff] [blame] | 2204 | ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
| 2205 | cmd->data_length, zero_flag); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2206 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2207 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2208 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2209 | /* |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2210 | * If this command is not a write we can execute it right here, |
| 2211 | * for write buffers we need to notify the fabric driver first |
| 2212 | * and let it call back once the write buffers are ready. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2213 | */ |
Christoph Hellwig | 5f41a31 | 2012-05-20 14:34:44 -0400 | [diff] [blame] | 2214 | target_add_to_state_list(cmd); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2215 | if (cmd->data_direction != DMA_TO_DEVICE) { |
| 2216 | target_execute_cmd(cmd); |
| 2217 | return 0; |
| 2218 | } |
Nicholas Bellinger | 862e638 | 2013-06-06 01:35:18 -0700 | [diff] [blame] | 2219 | transport_cmd_check_stop(cmd, false, true); |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2220 | |
| 2221 | ret = cmd->se_tfo->write_pending(cmd); |
| 2222 | if (ret == -EAGAIN || ret == -ENOMEM) |
| 2223 | goto queue_full; |
| 2224 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2225 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
| 2226 | WARN_ON(ret); |
Christoph Hellwig | da0f761 | 2011-10-18 06:57:01 -0400 | [diff] [blame] | 2227 | |
Nicholas Bellinger | b69c1fc | 2012-11-06 15:43:53 -0800 | [diff] [blame] | 2228 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2229 | |
Christoph Hellwig | c3196f0 | 2012-07-08 15:58:41 -0400 | [diff] [blame] | 2230 | queue_full: |
| 2231 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
| 2232 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
| 2233 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2234 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2235 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2236 | EXPORT_SYMBOL(transport_generic_new_cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2237 | |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2238 | static void transport_write_pending_qf(struct se_cmd *cmd) |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2239 | { |
Nicholas Bellinger | f147abb | 2011-10-25 23:57:41 -0700 | [diff] [blame] | 2240 | int ret; |
| 2241 | |
| 2242 | ret = cmd->se_tfo->write_pending(cmd); |
| 2243 | if (ret == -EAGAIN || ret == -ENOMEM) { |
Christoph Hellwig | e057f53 | 2011-10-17 13:56:41 -0400 | [diff] [blame] | 2244 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
| 2245 | cmd); |
| 2246 | transport_handle_queue_full(cmd, cmd->se_dev); |
| 2247 | } |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2248 | } |
| 2249 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2250 | 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] | 2251 | { |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2252 | unsigned long flags; |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2253 | int ret = 0; |
| 2254 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2255 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2256 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2257 | transport_wait_for_tasks(cmd); |
| 2258 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2259 | ret = transport_release_cmd(cmd); |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2260 | } else { |
| 2261 | if (wait_for_tasks) |
| 2262 | transport_wait_for_tasks(cmd); |
Nicholas Bellinger | c130480 | 2013-08-31 15:12:01 -0700 | [diff] [blame] | 2263 | /* |
| 2264 | * Handle WRITE failure case where transport_generic_new_cmd() |
| 2265 | * has already added se_cmd to state_list, but fabric has |
| 2266 | * failed command before I/O submission. |
| 2267 | */ |
| 2268 | if (cmd->state_active) { |
| 2269 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 2270 | target_remove_from_state_list(cmd); |
| 2271 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2272 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2273 | |
Christoph Hellwig | 82f1c8a | 2011-09-13 23:09:01 +0200 | [diff] [blame] | 2274 | if (cmd->se_lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2275 | transport_lun_remove_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2276 | |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2277 | ret = transport_put_cmd(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2278 | } |
Nicholas Bellinger | d5ddad416 | 2013-05-31 00:46:11 -0700 | [diff] [blame] | 2279 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2280 | } |
| 2281 | EXPORT_SYMBOL(transport_generic_free_cmd); |
| 2282 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2283 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
| 2284 | * @se_sess: session to reference |
| 2285 | * @se_cmd: command descriptor to add |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2286 | * @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] | 2287 | */ |
Nicholas Bellinger | 20361e6 | 2013-03-21 22:54:28 -0700 | [diff] [blame] | 2288 | 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] | 2289 | bool ack_kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2290 | { |
| 2291 | unsigned long flags; |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2292 | int ret = 0; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2293 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2294 | kref_init(&se_cmd->cmd_kref); |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2295 | /* |
| 2296 | * Add a second kref if the fabric caller is expecting to handle |
| 2297 | * fabric acknowledgement that requires two target_put_sess_cmd() |
| 2298 | * invocations before se_cmd descriptor release. |
| 2299 | */ |
Nicholas Bellinger | 8671556 | 2012-02-13 01:07:22 -0800 | [diff] [blame] | 2300 | if (ack_kref == true) { |
Nicholas Bellinger | a636078 | 2011-11-18 20:36:22 -0800 | [diff] [blame] | 2301 | kref_get(&se_cmd->cmd_kref); |
Nicholas Bellinger | 8671556 | 2012-02-13 01:07:22 -0800 | [diff] [blame] | 2302 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
| 2303 | } |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2304 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2305 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2306 | if (se_sess->sess_tearing_down) { |
| 2307 | ret = -ESHUTDOWN; |
| 2308 | goto out; |
| 2309 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2310 | 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] | 2311 | out: |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2312 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
Roland Dreier | bc187ea | 2012-07-16 11:04:40 -0700 | [diff] [blame] | 2313 | return ret; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2314 | } |
Nicholas Bellinger | 20361e6 | 2013-03-21 22:54:28 -0700 | [diff] [blame] | 2315 | EXPORT_SYMBOL(target_get_sess_cmd); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2316 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2317 | static void target_release_cmd_kref(struct kref *kref) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2318 | { |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2319 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
| 2320 | struct se_session *se_sess = se_cmd->se_sess; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2321 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2322 | if (list_empty(&se_cmd->se_cmd_list)) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2323 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | ffc32d5 | 2012-02-13 02:35:01 -0800 | [diff] [blame] | 2324 | se_cmd->se_tfo->release_cmd(se_cmd); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2325 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2326 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2327 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2328 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2329 | complete(&se_cmd->cmd_wait_comp); |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2330 | return; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2331 | } |
| 2332 | list_del(&se_cmd->se_cmd_list); |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2333 | spin_unlock(&se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2334 | |
Nicholas Bellinger | 7481deb | 2011-11-12 00:32:17 -0800 | [diff] [blame] | 2335 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2336 | } |
| 2337 | |
| 2338 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put |
| 2339 | * @se_sess: session to reference |
| 2340 | * @se_cmd: command descriptor to drop |
| 2341 | */ |
| 2342 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) |
| 2343 | { |
Joern Engel | ccf5ae8 | 2013-05-13 16:30:06 -0400 | [diff] [blame] | 2344 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
| 2345 | &se_sess->sess_cmd_lock); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2346 | } |
| 2347 | EXPORT_SYMBOL(target_put_sess_cmd); |
| 2348 | |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2349 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
| 2350 | * sess_cmd_list to complete cmd_wait_comp. Set |
| 2351 | * sess_tearing_down so no more commands are queued. |
| 2352 | * @se_sess: session to flag |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2353 | */ |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2354 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2355 | { |
| 2356 | struct se_cmd *se_cmd; |
| 2357 | unsigned long flags; |
| 2358 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2359 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2360 | if (se_sess->sess_tearing_down) { |
| 2361 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2362 | return; |
| 2363 | } |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2364 | se_sess->sess_tearing_down = 1; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2365 | 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] | 2366 | |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2367 | 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] | 2368 | se_cmd->cmd_wait_set = 1; |
| 2369 | |
| 2370 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2371 | } |
Roland Dreier | 1c7b13f | 2012-07-16 11:04:42 -0700 | [diff] [blame] | 2372 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2373 | |
| 2374 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors |
| 2375 | * @se_sess: session to wait for active I/O |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2376 | */ |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2377 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2378 | { |
| 2379 | struct se_cmd *se_cmd, *tmp_cmd; |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2380 | unsigned long flags; |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2381 | |
| 2382 | list_for_each_entry_safe(se_cmd, tmp_cmd, |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2383 | &se_sess->sess_wait_list, se_cmd_list) { |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2384 | list_del(&se_cmd->se_cmd_list); |
| 2385 | |
| 2386 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" |
| 2387 | " %d\n", se_cmd, se_cmd->t_state, |
| 2388 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
| 2389 | |
Joern Engel | be646c2d | 2013-05-15 00:44:07 -0700 | [diff] [blame] | 2390 | wait_for_completion(&se_cmd->cmd_wait_comp); |
| 2391 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" |
| 2392 | " fabric state: %d\n", se_cmd, se_cmd->t_state, |
| 2393 | se_cmd->se_tfo->get_cmd_state(se_cmd)); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2394 | |
| 2395 | se_cmd->se_tfo->release_cmd(se_cmd); |
| 2396 | } |
Nicholas Bellinger | 9b31a32 | 2013-05-15 00:52:44 -0700 | [diff] [blame] | 2397 | |
| 2398 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
| 2399 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); |
| 2400 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 2401 | |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2402 | } |
| 2403 | EXPORT_SYMBOL(target_wait_for_sess_cmds); |
| 2404 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2405 | static int transport_clear_lun_ref_thread(void *p) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2406 | { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 2407 | struct se_lun *lun = p; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2408 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2409 | percpu_ref_kill(&lun->lun_ref); |
| 2410 | |
| 2411 | wait_for_completion(&lun->lun_ref_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2412 | complete(&lun->lun_shutdown_comp); |
| 2413 | |
| 2414 | return 0; |
| 2415 | } |
| 2416 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2417 | int transport_clear_lun_ref(struct se_lun *lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2418 | { |
| 2419 | struct task_struct *kt; |
| 2420 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 2421 | kt = kthread_run(transport_clear_lun_ref_thread, lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2422 | "tcm_cl_%u", lun->unpacked_lun); |
| 2423 | if (IS_ERR(kt)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2424 | pr_err("Unable to start clear_lun thread\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2425 | return PTR_ERR(kt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2426 | } |
| 2427 | wait_for_completion(&lun->lun_shutdown_comp); |
| 2428 | |
| 2429 | return 0; |
| 2430 | } |
| 2431 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2432 | /** |
| 2433 | * transport_wait_for_tasks - wait for completion to occur |
| 2434 | * @cmd: command to wait |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2435 | * |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2436 | * Called from frontend fabric context to wait for storage engine |
| 2437 | * to pause and/or release frontend generated struct se_cmd. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2438 | */ |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2439 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2440 | { |
| 2441 | unsigned long flags; |
| 2442 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2443 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2444 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
| 2445 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2446 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2447 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2448 | } |
Christoph Hellwig | cb4f4d3 | 2012-05-20 11:59:10 -0400 | [diff] [blame] | 2449 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 2450 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
| 2451 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2452 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2453 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2454 | } |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2455 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2456 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2457 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2458 | return false; |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2459 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2460 | |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2461 | cmd->transport_state |= CMD_T_STOP; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2462 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2463 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2464 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 2465 | cmd, cmd->se_tfo->get_task_tag(cmd), |
| 2466 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2467 | |
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 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2470 | wait_for_completion(&cmd->t_transport_stop_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2471 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2472 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2473 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2474 | |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 2475 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2476 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2477 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2478 | |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2479 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | a17f091 | 2011-11-02 21:52:08 -0700 | [diff] [blame] | 2480 | |
| 2481 | return true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2482 | } |
Nicholas Bellinger | d14921d | 2011-10-09 01:00:58 -0700 | [diff] [blame] | 2483 | EXPORT_SYMBOL(transport_wait_for_tasks); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2484 | |
| 2485 | static int transport_get_sense_codes( |
| 2486 | struct se_cmd *cmd, |
| 2487 | u8 *asc, |
| 2488 | u8 *ascq) |
| 2489 | { |
| 2490 | *asc = cmd->scsi_asc; |
| 2491 | *ascq = cmd->scsi_ascq; |
| 2492 | |
| 2493 | return 0; |
| 2494 | } |
| 2495 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2496 | int |
| 2497 | transport_send_check_condition_and_sense(struct se_cmd *cmd, |
| 2498 | sense_reason_t reason, int from_transport) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2499 | { |
| 2500 | unsigned char *buffer = cmd->sense_buffer; |
| 2501 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2502 | u8 asc = 0, ascq = 0; |
| 2503 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2504 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2505 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2506 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2507 | return 0; |
| 2508 | } |
| 2509 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2510 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2511 | |
| 2512 | if (!reason && from_transport) |
| 2513 | goto after_reason; |
| 2514 | |
| 2515 | if (!from_transport) |
| 2516 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2517 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2518 | /* |
| 2519 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses |
| 2520 | * SENSE KEY values from include/scsi/scsi.h |
| 2521 | */ |
| 2522 | switch (reason) { |
Hannes Reinecke | ba82913 | 2012-12-17 09:53:33 +0100 | [diff] [blame] | 2523 | case TCM_NO_SENSE: |
| 2524 | /* CURRENT ERROR */ |
| 2525 | buffer[0] = 0x70; |
| 2526 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2527 | /* Not Ready */ |
| 2528 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
| 2529 | /* NO ADDITIONAL SENSE INFORMATION */ |
| 2530 | buffer[SPC_ASC_KEY_OFFSET] = 0; |
| 2531 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; |
| 2532 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2533 | case TCM_NON_EXISTENT_LUN: |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 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 | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2537 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2538 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2539 | /* LOGICAL UNIT NOT SUPPORTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2540 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
Nicholas Bellinger | eb39d34 | 2011-07-26 16:59:00 -0700 | [diff] [blame] | 2541 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2542 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 2543 | case TCM_SECTOR_COUNT_TOO_MANY: |
| 2544 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2545 | buffer[0] = 0x70; |
| 2546 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2547 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2548 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2549 | /* INVALID COMMAND OPERATION CODE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2550 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2551 | break; |
| 2552 | case TCM_UNKNOWN_MODE_PAGE: |
| 2553 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2554 | buffer[0] = 0x70; |
| 2555 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2556 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2557 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2558 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2559 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2560 | break; |
| 2561 | case TCM_CHECK_CONDITION_ABORT_CMD: |
| 2562 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2563 | buffer[0] = 0x70; |
| 2564 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2565 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2566 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2567 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2568 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
| 2569 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2570 | break; |
| 2571 | case TCM_INCORRECT_AMOUNT_OF_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 | /* NOT ENOUGH UNSOLICITED DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2580 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2581 | break; |
| 2582 | case TCM_INVALID_CDB_FIELD: |
| 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; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2586 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2587 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2588 | /* INVALID FIELD IN CDB */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2589 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2590 | break; |
| 2591 | case TCM_INVALID_PARAMETER_LIST: |
| 2592 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2593 | buffer[0] = 0x70; |
| 2594 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | 9fbc890 | 2012-01-09 17:54:00 -0800 | [diff] [blame] | 2595 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2596 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2597 | /* INVALID FIELD IN PARAMETER LIST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2598 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2599 | break; |
Roland Dreier | bb992e7 | 2013-02-08 15:18:39 -0800 | [diff] [blame] | 2600 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
| 2601 | /* CURRENT ERROR */ |
| 2602 | buffer[0] = 0x70; |
| 2603 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2604 | /* ILLEGAL REQUEST */ |
| 2605 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2606 | /* PARAMETER LIST LENGTH ERROR */ |
| 2607 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; |
| 2608 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2609 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
| 2610 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2611 | buffer[0] = 0x70; |
| 2612 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2613 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2614 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2615 | /* WRITE ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2616 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2617 | /* UNEXPECTED_UNSOLICITED_DATA */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2618 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2619 | break; |
| 2620 | case TCM_SERVICE_CRC_ERROR: |
| 2621 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2622 | buffer[0] = 0x70; |
| 2623 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2624 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2625 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2626 | /* PROTOCOL SERVICE CRC ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2627 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2628 | /* N/A */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2629 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2630 | break; |
| 2631 | case TCM_SNACK_REJECTED: |
| 2632 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2633 | buffer[0] = 0x70; |
| 2634 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2635 | /* ABORTED COMMAND */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2636 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2637 | /* READ ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2638 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2639 | /* FAILED RETRANSMISSION REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2640 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2641 | break; |
| 2642 | case TCM_WRITE_PROTECTED: |
| 2643 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2644 | buffer[0] = 0x70; |
| 2645 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2646 | /* DATA PROTECT */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2647 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2648 | /* WRITE PROTECTED */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2649 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2650 | break; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2651 | case TCM_ADDRESS_OUT_OF_RANGE: |
| 2652 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2653 | buffer[0] = 0x70; |
| 2654 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2655 | /* ILLEGAL REQUEST */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2656 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2657 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2658 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
Roland Dreier | e2397c7 | 2012-07-16 15:34:21 -0700 | [diff] [blame] | 2659 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2660 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
| 2661 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2662 | buffer[0] = 0x70; |
| 2663 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2664 | /* UNIT ATTENTION */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2665 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2666 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2667 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2668 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2669 | break; |
| 2670 | case TCM_CHECK_CONDITION_NOT_READY: |
| 2671 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2672 | buffer[0] = 0x70; |
| 2673 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2674 | /* Not Ready */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2675 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2676 | transport_get_sense_codes(cmd, &asc, &ascq); |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2677 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
| 2678 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2679 | break; |
Nicholas Bellinger | 818b571 | 2013-08-19 15:10:38 -0700 | [diff] [blame] | 2680 | case TCM_MISCOMPARE_VERIFY: |
| 2681 | /* CURRENT ERROR */ |
| 2682 | buffer[0] = 0x70; |
| 2683 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2684 | buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE; |
| 2685 | /* MISCOMPARE DURING VERIFY OPERATION */ |
| 2686 | buffer[SPC_ASC_KEY_OFFSET] = 0x1d; |
| 2687 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x00; |
| 2688 | break; |
Nicholas Bellinger | fcc4f17b | 2014-01-07 23:39:33 +0000 | [diff] [blame] | 2689 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
| 2690 | /* CURRENT ERROR */ |
| 2691 | buffer[0] = 0x70; |
| 2692 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2693 | /* ILLEGAL REQUEST */ |
| 2694 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2695 | /* LOGICAL BLOCK GUARD CHECK FAILED */ |
| 2696 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2697 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x01; |
| 2698 | break; |
| 2699 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: |
| 2700 | /* CURRENT ERROR */ |
| 2701 | buffer[0] = 0x70; |
| 2702 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2703 | /* ILLEGAL REQUEST */ |
| 2704 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2705 | /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */ |
| 2706 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2707 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x02; |
| 2708 | break; |
| 2709 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: |
| 2710 | /* CURRENT ERROR */ |
| 2711 | buffer[0] = 0x70; |
| 2712 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
| 2713 | /* ILLEGAL REQUEST */ |
| 2714 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
| 2715 | /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */ |
| 2716 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; |
| 2717 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; |
| 2718 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2719 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 2720 | default: |
| 2721 | /* CURRENT ERROR */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2722 | buffer[0] = 0x70; |
| 2723 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; |
Jörn Engel | ad67328 | 2013-03-18 18:30:31 -0400 | [diff] [blame] | 2724 | /* |
| 2725 | * Returning ILLEGAL REQUEST would cause immediate IO errors on |
| 2726 | * Solaris initiators. Returning NOT READY instead means the |
| 2727 | * operations will be retried a finite number of times and we |
| 2728 | * can survive intermittent errors. |
| 2729 | */ |
| 2730 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2731 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
Hannes Reinecke | 18a9df4 | 2012-12-17 09:53:32 +0100 | [diff] [blame] | 2732 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2733 | break; |
| 2734 | } |
| 2735 | /* |
| 2736 | * This code uses linux/include/scsi/scsi.h SAM status codes! |
| 2737 | */ |
| 2738 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; |
| 2739 | /* |
| 2740 | * Automatically padded, this value is encoded in the fabric's |
| 2741 | * data_length response PDU containing the SCSI defined sense data. |
| 2742 | */ |
Roland Dreier | 9c58b7d | 2012-08-15 14:35:25 -0700 | [diff] [blame] | 2743 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2744 | |
| 2745 | after_reason: |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2746 | trace_target_cmd_complete(cmd); |
Nicholas Bellinger | 07bde79 | 2011-06-13 14:46:09 -0700 | [diff] [blame] | 2747 | return cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2748 | } |
| 2749 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); |
| 2750 | |
| 2751 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) |
| 2752 | { |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2753 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
| 2754 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2755 | |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2756 | if (!send_status || (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
| 2757 | return 1; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2758 | |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2759 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n", |
| 2760 | cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2761 | |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2762 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2763 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2764 | trace_target_cmd_complete(cmd); |
Roland Dreier | c18bc7d | 2012-11-16 08:06:19 -0800 | [diff] [blame] | 2765 | cmd->se_tfo->queue_status(cmd); |
| 2766 | |
| 2767 | return 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2768 | } |
| 2769 | EXPORT_SYMBOL(transport_check_aborted_status); |
| 2770 | |
| 2771 | void transport_send_task_abort(struct se_cmd *cmd) |
| 2772 | { |
Nicholas Bellinger | c252f00 | 2011-09-29 14:22:13 -0700 | [diff] [blame] | 2773 | unsigned long flags; |
| 2774 | |
| 2775 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Roland Dreier | 3ea160b | 2012-11-16 08:06:16 -0800 | [diff] [blame] | 2776 | 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] | 2777 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2778 | return; |
| 2779 | } |
| 2780 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
| 2781 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2782 | /* |
| 2783 | * If there are still expected incoming fabric WRITEs, we wait |
| 2784 | * until until they have completed before sending a TASK_ABORTED |
| 2785 | * response. This response with TASK_ABORTED status will be |
| 2786 | * queued back to fabric module by transport_check_aborted_status(). |
| 2787 | */ |
| 2788 | if (cmd->data_direction == DMA_TO_DEVICE) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2789 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 2790 | cmd->transport_state |= CMD_T_ABORTED; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2791 | smp_mb__after_atomic_inc(); |
Nicholas Bellinger | 29f4c09 | 2013-11-13 14:39:14 -0800 | [diff] [blame] | 2792 | return; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2793 | } |
| 2794 | } |
| 2795 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2796 | |
Roland Dreier | 72b59d6e | 2013-01-02 12:47:58 -0800 | [diff] [blame] | 2797 | transport_lun_remove_cmd(cmd); |
| 2798 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2799 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 2800 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2801 | cmd->se_tfo->get_task_tag(cmd)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 2802 | |
Roland Dreier | e5c0d6a | 2013-06-26 17:36:17 -0700 | [diff] [blame] | 2803 | trace_target_cmd_complete(cmd); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2804 | cmd->se_tfo->queue_status(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2805 | } |
| 2806 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2807 | static void target_tmr_work(struct work_struct *work) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2808 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2809 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2810 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2811 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
| 2812 | int ret; |
| 2813 | |
| 2814 | switch (tmr->function) { |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2815 | case TMR_ABORT_TASK: |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 2816 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2817 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2818 | case TMR_ABORT_TASK_SET: |
| 2819 | case TMR_CLEAR_ACA: |
| 2820 | case TMR_CLEAR_TASK_SET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2821 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
| 2822 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2823 | case TMR_LUN_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2824 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
| 2825 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : |
| 2826 | TMR_FUNCTION_REJECTED; |
| 2827 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2828 | case TMR_TARGET_WARM_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2829 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2830 | break; |
Nicholas Bellinger | 5c6cd61 | 2011-03-14 04:06:04 -0700 | [diff] [blame] | 2831 | case TMR_TARGET_COLD_RESET: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2832 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2833 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2834 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2835 | pr_err("Uknown TMR function: 0x%02x.\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2836 | tmr->function); |
| 2837 | tmr->response = TMR_FUNCTION_REJECTED; |
| 2838 | break; |
| 2839 | } |
| 2840 | |
| 2841 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2842 | cmd->se_tfo->queue_tm_rsp(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2843 | |
Christoph Hellwig | b7b8bef | 2011-10-17 13:56:44 -0400 | [diff] [blame] | 2844 | transport_cmd_check_stop_to_fabric(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2845 | } |
| 2846 | |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2847 | int transport_generic_handle_tmr( |
| 2848 | struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2849 | { |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2850 | INIT_WORK(&cmd->work, target_tmr_work); |
| 2851 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2852 | return 0; |
| 2853 | } |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 2854 | EXPORT_SYMBOL(transport_generic_handle_tmr); |